Merge pull request 'Got rid of bools in 2fa provider' (#144) from SEND014 into main

Reviewed-on: #144

.gitignore

@@ -9,3 +9,5 @@ untranslated.txt
 generate_protos.sh
 update_dep.sh
 .vscode/
+.gocache/
+.cache/

api/billing/fees/go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver v1.17.6
 	go.uber.org/zap v1.27.1
-	google.golang.org/grpc v1.77.0
+	google.golang.org/grpc v1.78.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -31,7 +31,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/prometheus/client_golang v1.23.2
@@ -49,6 +49,6 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
-	google.golang.org/protobuf v1.36.10
+	google.golang.org/protobuf v1.36.11
 )

api/billing/fees/go.sum

@@ -95,8 +95,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -212,12 +212,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/billing/fees/internal/service/fees/internal/calculator/impl.go

@@ -90,10 +90,6 @@ func (c *quoteCalculator) Compute(ctx context.Context, plan *model.FeePlan, inte
 		}
 
 		ledgerAccountRef := strings.TrimSpace(rule.LedgerAccountRef)
-		if ledgerAccountRef == "" {
-			c.logger.Warn("fee rule missing ledger account reference", zap.String("rule_id", rule.RuleID))
-			continue
-		}
 
 		amount, scale, calcErr := c.calculateRuleAmount(baseAmount, baseScale, rule)
 		if calcErr != nil {
@@ -113,7 +109,8 @@ func (c *quoteCalculator) Compute(ctx context.Context, plan *model.FeePlan, inte
 
 		entrySide := mapEntrySide(rule.EntrySide)
 		if entrySide == accountingv1.EntrySide_ENTRY_SIDE_UNSPECIFIED {
-			entrySide = accountingv1.EntrySide_ENTRY_SIDE_CREDIT
+			// Default fees to debit (i.e. charge the customer) when entry side is not specified.
+			entrySide = accountingv1.EntrySide_ENTRY_SIDE_DEBIT
 		}
 
 		meta := map[string]string{

api/billing/fees/internal/service/fees/internal/resolver/impl.go

@@ -38,23 +38,23 @@ func New(plans storage.PlansStore, logger *zap.Logger) *feeResolver {
 	}
 }
 
-func (r *feeResolver) ResolveFeeRule(ctx context.Context, orgID *primitive.ObjectID, trigger model.Trigger, at time.Time, attrs map[string]string) (*model.FeePlan, *model.FeeRule, error) {
+func (r *feeResolver) ResolveFeeRule(ctx context.Context, orgRef *primitive.ObjectID, trigger model.Trigger, at time.Time, attrs map[string]string) (*model.FeePlan, *model.FeeRule, error) {
 	if r.plans == nil {
 		return nil, nil, merrors.InvalidArgument("fees: plans store is required")
 	}
 
 	// Try org-specific first if provided.
-	if orgID != nil && !orgID.IsZero() {
+	if orgRef != nil && !orgRef.IsZero() {
-		if plan, err := r.getOrgPlan(ctx, *orgID, at); err == nil {
+		if plan, err := r.getOrgPlan(ctx, *orgRef, at); err == nil {
 			if rule, selErr := selectRule(plan, trigger, at, attrs); selErr == nil {
 				return plan, rule, nil
 			} else if !errors.Is(selErr, ErrNoFeeRuleFound) {
-				r.logger.Warn("failed selecting rule for org plan", zap.Error(selErr), zap.String("org_ref", orgID.Hex()))
+				r.logger.Warn("failed selecting rule for org plan", zap.Error(selErr), zap.String("org_ref", orgRef.Hex()))
 				return nil, nil, selErr
 			}
-			r.logger.Debug("no matching rule in org plan; falling back to global", zap.String("org_ref", orgID.Hex()))
+			r.logger.Debug("no matching rule in org plan; falling back to global", zap.String("org_ref", orgRef.Hex()))
 		} else if !errors.Is(err, storage.ErrFeePlanNotFound) {
-			r.logger.Warn("failed resolving org fee plan", zap.Error(err), zap.String("org_ref", orgID.Hex()))
+			r.logger.Warn("failed resolving org fee plan", zap.Error(err), zap.String("org_ref", orgRef.Hex()))
 			return nil, nil, err
 		}
 	}

api/billing/fees/internal/service/fees/internal/resolver/resolver_test.go

@@ -32,8 +32,8 @@ func TestResolver_GlobalFallbackWhenOrgMissing(t *testing.T) {
 	if err != nil {
 		t.Fatalf("expected fallback to global, got error: %v", err)
 	}
-	if !plan.GetOrganizationRef().IsZero() {
+	if plan.OrganizationRef != nil && !plan.OrganizationRef.IsZero() {
-		t.Fatalf("expected global plan, got orgRef %s", plan.GetOrganizationRef().Hex())
+		t.Fatalf("expected global plan, got orgRef %s", plan.OrganizationRef.Hex())
 	}
 	if rule.RuleID != "global_capture" {
 		t.Fatalf("unexpected rule selected: %s", rule.RuleID)
@@ -59,8 +59,7 @@ func TestResolver_OrgOverridesGlobal(t *testing.T) {
 			{RuleID: "org_capture", Trigger: model.TriggerCapture, Priority: 10, Percentage: "0.03", EffectiveFrom: now.Add(-time.Hour)},
 		},
 	}
-	orgPlan.SetOrganizationRef(org)
+	orgPlan.OrganizationRef = &org
-
 	store := &memoryPlansStore{plans: []*model.FeePlan{globalPlan, orgPlan}}
 	resolver := New(store, zap.NewNop())
 
@@ -95,7 +94,7 @@ func TestResolver_SelectsHighestPriority(t *testing.T) {
 			{RuleID: "high", Trigger: model.TriggerCapture, Priority: 200, Percentage: "0.03", EffectiveFrom: now.Add(-time.Hour)},
 		},
 	}
-	plan.SetOrganizationRef(org)
+	plan.OrganizationRef = &org
 
 	store := &memoryPlansStore{plans: []*model.FeePlan{plan}}
 	resolver := New(store, zap.NewNop())
@@ -136,7 +135,7 @@ func TestResolver_EffectiveDateFiltering(t *testing.T) {
 			{RuleID: "expired", Trigger: model.TriggerCapture, Priority: 100, Percentage: "0.05", EffectiveFrom: past, EffectiveTo: &past},
 		},
 	}
-	orgPlan.SetOrganizationRef(org)
+	orgPlan.OrganizationRef = &org
 
 	globalPlan := &model.FeePlan{
 		Active:        true,
@@ -221,7 +220,7 @@ func TestResolver_MultipleActivePlansConflict(t *testing.T) {
 			{RuleID: "r1", Trigger: model.TriggerCapture, Priority: 10, Percentage: "0.05", EffectiveFrom: now.Add(-time.Hour)},
 		},
 	}
-	p1.SetOrganizationRef(org)
+	p1.OrganizationRef = &org
 	p2 := &model.FeePlan{
 		Active:        true,
 		EffectiveFrom: now.Add(-30 * time.Minute),
@@ -229,7 +228,7 @@ func TestResolver_MultipleActivePlansConflict(t *testing.T) {
 			{RuleID: "r2", Trigger: model.TriggerCapture, Priority: 20, Percentage: "0.03", EffectiveFrom: now.Add(-time.Hour)},
 		},
 	}
-	p2.SetOrganizationRef(org)
+	p2.OrganizationRef = &org
 
 	store := &memoryPlansStore{plans: []*model.FeePlan{p1, p2}}
 	resolver := New(store, zap.NewNop())
@@ -263,7 +262,7 @@ func (m *memoryPlansStore) GetActivePlan(ctx context.Context, orgRef primitive.O
 func (m *memoryPlansStore) FindActiveOrgPlan(_ context.Context, orgRef primitive.ObjectID, at time.Time) (*model.FeePlan, error) {
 	var matches []*model.FeePlan
 	for _, plan := range m.plans {
-		if plan == nil || plan.GetOrganizationRef() != orgRef {
+		if plan == nil || plan.OrganizationRef == nil || plan.OrganizationRef.IsZero() || (*plan.OrganizationRef != orgRef) {
 			continue
 		}
 		if !plan.Active {
@@ -289,7 +288,7 @@ func (m *memoryPlansStore) FindActiveOrgPlan(_ context.Context, orgRef primitive
 func (m *memoryPlansStore) FindActiveGlobalPlan(_ context.Context, at time.Time) (*model.FeePlan, error) {
 	var matches []*model.FeePlan
 	for _, plan := range m.plans {
-		if plan == nil || !plan.GetOrganizationRef().IsZero() {
+		if plan == nil || ((plan.OrganizationRef != nil) && !plan.OrganizationRef.IsZero()) {
 			continue
 		}
 		if !plan.Active {

api/billing/fees/internal/service/fees/logging.go

@@ -0,0 +1,88 @@
+package fees
+
+import (
+	"strings"
+	"time"
+
+	feesv1 "github.com/tech/sendico/pkg/proto/billing/fees/v1"
+	tracev1 "github.com/tech/sendico/pkg/proto/common/trace/v1"
+	"go.uber.org/zap"
+)
+
+func requestLogFields(meta *feesv1.RequestMeta, intent *feesv1.Intent) []zap.Field {
+	fields := logFieldsFromRequestMeta(meta)
+	fields = append(fields, logFieldsFromIntent(intent)...)
+	return fields
+}
+
+func logFieldsFromRequestMeta(meta *feesv1.RequestMeta) []zap.Field {
+	if meta == nil {
+		return nil
+	}
+	fields := make([]zap.Field, 0, 4)
+	if org := strings.TrimSpace(meta.GetOrganizationRef()); org != "" {
+		fields = append(fields, zap.String("organization_ref", org))
+	}
+	fields = append(fields, logFieldsFromTrace(meta.GetTrace())...)
+	return fields
+}
+
+func logFieldsFromIntent(intent *feesv1.Intent) []zap.Field {
+	if intent == nil {
+		return nil
+	}
+	fields := make([]zap.Field, 0, 5)
+	if trigger := intent.GetTrigger(); trigger != feesv1.Trigger_TRIGGER_UNSPECIFIED {
+		fields = append(fields, zap.String("trigger", trigger.String()))
+	}
+	if base := intent.GetBaseAmount(); base != nil {
+		if amount := strings.TrimSpace(base.GetAmount()); amount != "" {
+			fields = append(fields, zap.String("base_amount", amount))
+		}
+		if currency := strings.TrimSpace(base.GetCurrency()); currency != "" {
+			fields = append(fields, zap.String("base_currency", currency))
+		}
+	}
+	if booked := intent.GetBookedAt(); booked != nil && booked.IsValid() {
+		fields = append(fields, zap.Time("booked_at", booked.AsTime()))
+	}
+	if attrs := intent.GetAttributes(); len(attrs) > 0 {
+		fields = append(fields, zap.Int("attributes_count", len(attrs)))
+	}
+	return fields
+}
+
+func logFieldsFromTrace(trace *tracev1.TraceContext) []zap.Field {
+	if trace == nil {
+		return nil
+	}
+	fields := make([]zap.Field, 0, 3)
+	if reqRef := strings.TrimSpace(trace.GetRequestRef()); reqRef != "" {
+		fields = append(fields, zap.String("request_ref", reqRef))
+	}
+	if idem := strings.TrimSpace(trace.GetIdempotencyKey()); idem != "" {
+		fields = append(fields, zap.String("idempotency_key", idem))
+	}
+	if traceRef := strings.TrimSpace(trace.GetTraceRef()); traceRef != "" {
+		fields = append(fields, zap.String("trace_ref", traceRef))
+	}
+	return fields
+}
+
+func logFieldsFromTokenPayload(payload *feeQuoteTokenPayload) []zap.Field {
+	if payload == nil {
+		return nil
+	}
+	fields := make([]zap.Field, 0, 6)
+	if org := strings.TrimSpace(payload.OrganizationRef); org != "" {
+		fields = append(fields, zap.String("organization_ref", org))
+	}
+	if payload.ExpiresAtUnixMs > 0 {
+		fields = append(fields,
+			zap.Int64("expires_at_unix_ms", payload.ExpiresAtUnixMs),
+			zap.Time("expires_at", time.UnixMilli(payload.ExpiresAtUnixMs)))
+	}
+	fields = append(fields, logFieldsFromIntent(payload.Intent)...)
+	fields = append(fields, logFieldsFromTrace(payload.Trace)...)
+	return fields
+}

api/billing/fees/internal/service/fees/service.go

@@ -72,26 +72,57 @@ func (s *Service) Register(router routers.GRPC) error {
 }
 
 func (s *Service) QuoteFees(ctx context.Context, req *feesv1.QuoteFeesRequest) (resp *feesv1.QuoteFeesResponse, err error) {
+	var (
+		meta   *feesv1.RequestMeta
+		intent *feesv1.Intent
+	)
+	if req != nil {
+		meta = req.GetMeta()
+		intent = req.GetIntent()
+	}
+	logger := s.logger.With(requestLogFields(meta, intent)...)
+
 	start := s.clock.Now()
 	trigger := feesv1.Trigger_TRIGGER_UNSPECIFIED
-	if req != nil && req.GetIntent() != nil {
+	if intent != nil {
-		trigger = req.GetIntent().GetTrigger()
+		trigger = intent.GetTrigger()
 	}
 	var fxUsed bool
 	defer func() {
 		statusLabel := statusFromError(err)
+		linesCount := 0
+		appliedCount := 0
 		if err == nil && resp != nil {
 			fxUsed = resp.GetFxUsed() != nil
+			linesCount = len(resp.GetLines())
+			appliedCount = len(resp.GetApplied())
 		}
 		observeMetrics("quote", trigger, statusLabel, fxUsed, time.Since(start))
+
+		logFields := []zap.Field{
+			zap.String("status", statusLabel),
+			zap.Duration("duration", time.Since(start)),
+			zap.Bool("fx_used", fxUsed),
+			zap.String("trigger", trigger.String()),
+			zap.Int("lines", linesCount),
+			zap.Int("applied_rules", appliedCount),
+		}
+		if err != nil {
+			logger.Warn("QuoteFees finished", append(logFields, zap.Error(err))...)
+			return
+		}
+		logger.Info("QuoteFees finished", logFields...)
 	}()
 
+	logger.Debug("QuoteFees request received")
+
 	if err = s.validateQuoteRequest(req); err != nil {
 		return nil, err
 	}
 
 	orgRef, parseErr := primitive.ObjectIDFromHex(req.GetMeta().GetOrganizationRef())
 	if parseErr != nil {
+		logger.Warn("QuoteFees invalid organization_ref", zap.Error(parseErr))
 		err = status.Error(codes.InvalidArgument, "invalid organization_ref")
 		return nil, err
 	}
@@ -112,20 +143,59 @@ func (s *Service) QuoteFees(ctx context.Context, req *feesv1.QuoteFeesRequest) (
 }
 
 func (s *Service) PrecomputeFees(ctx context.Context, req *feesv1.PrecomputeFeesRequest) (resp *feesv1.PrecomputeFeesResponse, err error) {
+	var (
+		meta   *feesv1.RequestMeta
+		intent *feesv1.Intent
+	)
+	if req != nil {
+		meta = req.GetMeta()
+		intent = req.GetIntent()
+	}
+	logger := s.logger.With(requestLogFields(meta, intent)...)
+
 	start := s.clock.Now()
 	trigger := feesv1.Trigger_TRIGGER_UNSPECIFIED
-	if req != nil && req.GetIntent() != nil {
+	if intent != nil {
-		trigger = req.GetIntent().GetTrigger()
+		trigger = intent.GetTrigger()
 	}
-	var fxUsed bool
+	var (
+		fxUsed    bool
+		expiresAt time.Time
+	)
 	defer func() {
 		statusLabel := statusFromError(err)
+		linesCount := 0
+		appliedCount := 0
 		if err == nil && resp != nil {
 			fxUsed = resp.GetFxUsed() != nil
+			linesCount = len(resp.GetLines())
+			appliedCount = len(resp.GetApplied())
+			if ts := resp.GetExpiresAt(); ts != nil {
+				expiresAt = ts.AsTime()
+			}
 		}
 		observeMetrics("precompute", trigger, statusLabel, fxUsed, time.Since(start))
+
+		logFields := []zap.Field{
+			zap.String("status", statusLabel),
+			zap.Duration("duration", time.Since(start)),
+			zap.Bool("fx_used", fxUsed),
+			zap.String("trigger", trigger.String()),
+			zap.Int("lines", linesCount),
+			zap.Int("applied_rules", appliedCount),
+		}
+		if !expiresAt.IsZero() {
+			logFields = append(logFields, zap.Time("expires_at", expiresAt))
+		}
+		if err != nil {
+			logger.Warn("PrecomputeFees finished", append(logFields, zap.Error(err))...)
+			return
+		}
+		logger.Info("PrecomputeFees finished", logFields...)
 	}()
 
+	logger.Debug("PrecomputeFees request received")
+
 	if err = s.validatePrecomputeRequest(req); err != nil {
 		return nil, err
 	}
@@ -134,6 +204,7 @@ func (s *Service) PrecomputeFees(ctx context.Context, req *feesv1.PrecomputeFees
 
 	orgRef, parseErr := primitive.ObjectIDFromHex(req.GetMeta().GetOrganizationRef())
 	if parseErr != nil {
+		logger.Warn("PrecomputeFees invalid organization_ref", zap.Error(parseErr))
 		err = status.Error(codes.InvalidArgument, "invalid organization_ref")
 		return nil, err
 	}
@@ -148,7 +219,7 @@ func (s *Service) PrecomputeFees(ctx context.Context, req *feesv1.PrecomputeFees
 	if ttl <= 0 {
 		ttl = 60000
 	}
-	expiresAt := now.Add(time.Duration(ttl) * time.Millisecond)
+	expiresAt = now.Add(time.Duration(ttl) * time.Millisecond)
 
 	payload := feeQuoteTokenPayload{
 		OrganizationRef: req.GetMeta().GetOrganizationRef(),
@@ -159,7 +230,7 @@ func (s *Service) PrecomputeFees(ctx context.Context, req *feesv1.PrecomputeFees
 
 	var token string
 	if token, err = encodeTokenPayload(payload); err != nil {
-		s.logger.Warn("failed to encode fee quote token", zap.Error(err))
+		logger.Warn("failed to encode fee quote token", zap.Error(err))
 		err = status.Error(codes.Internal, "failed to encode fee quote token")
 		return nil, err
 	}
@@ -176,9 +247,18 @@ func (s *Service) PrecomputeFees(ctx context.Context, req *feesv1.PrecomputeFees
 }
 
 func (s *Service) ValidateFeeToken(ctx context.Context, req *feesv1.ValidateFeeTokenRequest) (resp *feesv1.ValidateFeeTokenResponse, err error) {
+	tokenLen := 0
+	if req != nil {
+		tokenLen = len(strings.TrimSpace(req.GetFeeQuoteToken()))
+	}
+	logger := s.logger.With(zap.Int("token_length", tokenLen))
+
 	start := s.clock.Now()
 	trigger := feesv1.Trigger_TRIGGER_UNSPECIFIED
-	var fxUsed bool
+	var (
+		fxUsed       bool
+		resultReason string
+	)
 	defer func() {
 		statusLabel := statusFromError(err)
 		if err == nil && resp != nil {
@@ -191,9 +271,28 @@ func (s *Service) ValidateFeeToken(ctx context.Context, req *feesv1.ValidateFeeT
 			}
 		}
 		observeMetrics("validate", trigger, statusLabel, fxUsed, time.Since(start))
+
+		logFields := []zap.Field{
+			zap.String("status", statusLabel),
+			zap.Duration("duration", time.Since(start)),
+			zap.Bool("fx_used", fxUsed),
+			zap.String("trigger", trigger.String()),
+			zap.Bool("valid", resp != nil && resp.GetValid()),
+		}
+		if resultReason != "" {
+			logFields = append(logFields, zap.String("reason", resultReason))
+		}
+		if err != nil {
+			logger.Warn("ValidateFeeToken finished", append(logFields, zap.Error(err))...)
+			return
+		}
+		logger.Info("ValidateFeeToken finished", logFields...)
 	}()
 
+	logger.Debug("ValidateFeeToken request received")
+
 	if req == nil || strings.TrimSpace(req.GetFeeQuoteToken()) == "" {
+		resultReason = "missing_token"
 		err = status.Error(codes.InvalidArgument, "fee_quote_token is required")
 		return nil, err
 	}
@@ -202,21 +301,29 @@ func (s *Service) ValidateFeeToken(ctx context.Context, req *feesv1.ValidateFeeT
 
 	payload, decodeErr := decodeTokenPayload(req.GetFeeQuoteToken())
 	if decodeErr != nil {
-		s.logger.Warn("failed to decode fee quote token", zap.Error(decodeErr))
+		resultReason = "invalid_token"
+		logger.Warn("failed to decode fee quote token", zap.Error(decodeErr))
 		resp = &feesv1.ValidateFeeTokenResponse{Meta: &feesv1.ResponseMeta{}, Valid: false, Reason: "invalid_token"}
 		return resp, nil
 	}
 
+	logger = logger.With(logFieldsFromTokenPayload(&payload)...)
+
+	if payload.Intent != nil {
 		trigger = payload.Intent.GetTrigger()
+	}
 
 	if now.UnixMilli() > payload.ExpiresAtUnixMs {
+		resultReason = "expired"
+		logger.Info("fee quote token expired")
 		resp = &feesv1.ValidateFeeTokenResponse{Meta: &feesv1.ResponseMeta{}, Valid: false, Reason: "expired"}
 		return resp, nil
 	}
 
 	orgRef, parseErr := primitive.ObjectIDFromHex(payload.OrganizationRef)
 	if parseErr != nil {
-		s.logger.Warn("token contained invalid organization reference", zap.Error(parseErr))
+		resultReason = "invalid_token"
+		logger.Warn("token contained invalid organization reference", zap.Error(parseErr))
 		resp = &feesv1.ValidateFeeTokenResponse{Meta: &feesv1.ResponseMeta{}, Valid: false, Reason: "invalid_token"}
 		return resp, nil
 	}
@@ -280,6 +387,16 @@ func (s *Service) computeQuoteWithTime(ctx context.Context, orgRef primitive.Obj
 		bookedAt = intent.GetBookedAt().AsTime()
 	}
 
+	logFields := []zap.Field{
+		zap.Time("booked_at_used", bookedAt),
+	}
+	if !orgRef.IsZero() {
+		logFields = append(logFields, zap.String("organization_ref", orgRef.Hex()))
+	}
+	logFields = append(logFields, logFieldsFromIntent(intent)...)
+	logFields = append(logFields, logFieldsFromTrace(trace)...)
+	logger := s.logger.With(logFields...)
+
 	var orgPtr *primitive.ObjectID
 	if !orgRef.IsZero() {
 		orgPtr = &orgRef
@@ -297,7 +414,7 @@ func (s *Service) computeQuoteWithTime(ctx context.Context, orgRef primitive.Obj
 		case errors.Is(err, storage.ErrFeePlanNotFound):
 			return nil, nil, nil, status.Error(codes.NotFound, "fee plan not found")
 		default:
-			s.logger.Warn("failed to resolve fee rule", zap.Error(err))
+			logger.Warn("failed to resolve fee rule", zap.Error(err))
 			return nil, nil, nil, status.Error(codes.Internal, "failed to resolve fee rule")
 		}
 	}
@@ -313,7 +430,7 @@ func (s *Service) computeQuoteWithTime(ctx context.Context, orgRef primitive.Obj
 		if errors.Is(calcErr, merrors.ErrInvalidArg) {
 			return nil, nil, nil, status.Error(codes.InvalidArgument, calcErr.Error())
 		}
-		s.logger.Warn("failed to compute fee quote", zap.Error(calcErr))
+		logger.Warn("failed to compute fee quote", zap.Error(calcErr))
 		return nil, nil, nil, status.Error(codes.Internal, "failed to compute fee quote")
 	}
 

api/billing/fees/internal/service/fees/service_test.go

@@ -49,7 +49,7 @@ func TestQuoteFees_ComputesDerivedLines(t *testing.T) {
 		},
 	}
 	plan.SetID(primitive.NewObjectID())
-	plan.SetOrganizationRef(orgRef)
+	plan.OrganizationRef = &orgRef
 
 	service := NewService(
 		zap.NewNop(),
@@ -163,7 +163,7 @@ func TestQuoteFees_FiltersByAttributesAndDates(t *testing.T) {
 		},
 	}
 	plan.SetID(primitive.NewObjectID())
-	plan.SetOrganizationRef(orgRef)
+	plan.OrganizationRef = &orgRef
 
 	service := NewService(
 		zap.NewNop(),
@@ -224,7 +224,7 @@ func TestQuoteFees_RoundingDown(t *testing.T) {
 		},
 	}
 	plan.SetID(primitive.NewObjectID())
-	plan.SetOrganizationRef(orgRef)
+	plan.OrganizationRef = &orgRef
 
 	service := NewService(
 		zap.NewNop(),
@@ -277,7 +277,7 @@ func TestQuoteFees_UsesInjectedCalculator(t *testing.T) {
 		},
 	}
 	plan.SetID(primitive.NewObjectID())
-	plan.SetOrganizationRef(orgRef)
+	plan.OrganizationRef = &orgRef
 
 	result := &types.CalculationResult{
 		Lines: []*feesv1.DerivedPostingLine{
@@ -353,7 +353,7 @@ func TestQuoteFees_PopulatesFxUsed(t *testing.T) {
 		},
 	}
 	plan.SetID(primitive.NewObjectID())
-	plan.SetOrganizationRef(orgRef)
+	plan.OrganizationRef = &orgRef
 
 	fakeOracle := &oracleclient.Fake{
 		LatestRateFn: func(ctx context.Context, req oracleclient.LatestRateParams) (*oracleclient.RateSnapshot, error) {
@@ -452,7 +452,7 @@ func (s *stubPlansStore) FindActiveOrgPlan(_ context.Context, orgRef primitive.O
 	if s.plan == nil {
 		return nil, storage.ErrFeePlanNotFound
 	}
-	if s.plan.GetOrganizationRef() != orgRef {
+	if (s.plan.OrganizationRef != nil) && (*s.plan.OrganizationRef != orgRef) {
 		return nil, storage.ErrFeePlanNotFound
 	}
 	if !s.plan.Active {

api/billing/fees/storage/model/plan.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/tech/sendico/pkg/db/storable"
 	"github.com/tech/sendico/pkg/model"
+	"go.mongodb.org/mongo-driver/bson/primitive"
 )
 
 const (
@@ -26,8 +27,8 @@ const (
 // FeePlan describes a collection of fee rules for an organisation.
 type FeePlan struct {
 	storable.Base     `bson:",inline" json:",inline"`
-	model.OrganizationBoundBase `bson:",inline" json:",inline"`
 	model.Describable `bson:",inline" json:",inline"`
+	OrganizationRef   *primitive.ObjectID `bson:"organizationRef,omitempty" json:"organizationRef,omitempty"`
 	Active            bool                `bson:"active"             json:"active"`
 	EffectiveFrom     time.Time           `bson:"effectiveFrom"      json:"effectiveFrom"`
 	EffectiveTo       *time.Time          `bson:"effectiveTo,omitempty" json:"effectiveTo,omitempty"`

api/fx/ingestor/config.yml

@@ -11,12 +11,18 @@ market:
     - driver: CBR
       settings:
         base_url: "https://www.cbr.ru"
+        user_agent: "Mozilla/5.0 (compatible; SendicoFX/1.0; +https://app.sendico.io)"
+        accept_header: "application/xml,text/xml;q=0.9,*/*;q=0.8"
   pairs:
     BINANCE:
       - base: "USDT"
         quote: "EUR"
         symbol: "EURUSDT"
         invert: true
+      - base: "USD"
+        quote: "USDT"
+        symbol: "USDTUSD"
+        invert: true
       - base: "UAH"
         quote: "USDT"
         symbol: "USDTUAH"

api/fx/ingestor/go.mod

@@ -32,7 +32,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
@@ -49,7 +49,7 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
-	google.golang.org/grpc v1.77.0 // indirect
+	google.golang.org/grpc v1.78.0 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 )

api/fx/ingestor/go.sum

@@ -95,8 +95,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -212,12 +212,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/fx/ingestor/internal/ingestor/service.go

@@ -85,6 +85,7 @@ func (s *Service) executePoll(ctx context.Context) error {
 
 func (s *Service) pollOnce(ctx context.Context) error {
 	var firstErr error
+	failures := 0
 	for _, pair := range s.pairs {
 		start := time.Now()
 		err := s.upsertPair(ctx, pair)
@@ -96,14 +97,24 @@ func (s *Service) pollOnce(ctx context.Context) error {
 			if firstErr == nil {
 				firstErr = err
 			}
+			failures++
 			s.logger.Warn("Failed to ingest pair",
 				zap.String("symbol", pair.Symbol),
 				zap.String("source", pair.Source.String()),
+				zap.String("provider", pair.Provider),
+				zap.String("base", pair.Base),
+				zap.String("quote", pair.Quote),
+				zap.Bool("invert", pair.Invert),
 				zap.Duration("elapsed", elapsed),
 				zap.Error(err),
 			)
 		}
 	}
+	if failures > 0 {
+		s.logger.Warn("Ingestion poll completed with failures", zap.Int("failures", failures), zap.Int("total", len(s.pairs)))
+	} else {
+		s.logger.Info("Ingestion poll completed", zap.Int("total", len(s.pairs)))
+	}
 	return firstErr
 }
 
@@ -115,7 +126,7 @@ func (s *Service) upsertPair(ctx context.Context, pair config.Pair) error {
 
 	ticker, err := connector.FetchTicker(ctx, pair.Symbol)
 	if err != nil {
-		return merrors.InternalWrap(err, "fetch ticker")
+		return merrors.InternalWrap(err, "fetch ticker: "+pair.Symbol)
 	}
 
 	bid, err := parseDecimal(ticker.BidPrice)
@@ -172,9 +183,14 @@ func (s *Service) upsertPair(ctx context.Context, pair config.Pair) error {
 	s.logger.Debug("Snapshot ingested",
 		zap.String("pair", pair.Base+"/"+pair.Quote),
 		zap.String("provider", pair.Provider),
+		zap.String("source", pair.Source.String()),
+		zap.String("provider_ref", snapshot.ProviderRef),
 		zap.String("bid", snapshot.Bid),
 		zap.String("ask", snapshot.Ask),
 		zap.String("mid", snapshot.Mid),
+		zap.String("spread_bps", snapshot.SpreadBps),
+		zap.Int64("asof_unix_ms", snapshot.AsOfUnixMs),
+		zap.String("rate_ref", snapshot.RateRef),
 	)
 
 	return nil

api/fx/ingestor/internal/market/cbr/connector.go

@@ -23,7 +23,7 @@ import (
 type cbrConnector struct {
 	id            mmodel.Driver
 	provider      string
-	client        *http.Client
+	http          *httpClient
 	base          string
 	dailyPath     string
 	directoryPath string
@@ -60,6 +60,8 @@ func NewConnector(logger mlogger.Logger, settings model.SettingsT) (mmodel.Conne
 	directoryPath := defaultDirectoryPath
 	dailyPath := defaultDailyPath
 	dynamicPath := defaultDynamicPath
+	userAgent := defaultUserAgent
+	acceptHeader := defaultAccept
 
 	if settings != nil {
 		if value, ok := settings["base_url"].(string); ok && strings.TrimSpace(value) != "" {
@@ -77,6 +79,12 @@ func NewConnector(logger mlogger.Logger, settings model.SettingsT) (mmodel.Conne
 		if value, ok := settings["dynamic_path"].(string); ok && strings.TrimSpace(value) != "" {
 			dynamicPath = strings.TrimSpace(value)
 		}
+		if value, ok := settings["user_agent"].(string); ok && strings.TrimSpace(value) != "" {
+			userAgent = strings.TrimSpace(value)
+		}
+		if value, ok := settings["accept_header"].(string); ok && strings.TrimSpace(value) != "" {
+			acceptHeader = strings.TrimSpace(value)
+		}
 		dialTimeout = common.DurationSetting(settings, "dial_timeout_seconds", dialTimeout)
 		dialKeepAlive = common.DurationSetting(settings, "dial_keep_alive_seconds", dialKeepAlive)
 		tlsHandshakeTimeout = common.DurationSetting(settings, "tls_handshake_timeout_seconds", tlsHandshakeTimeout)
@@ -99,13 +107,24 @@ func NewConnector(logger mlogger.Logger, settings model.SettingsT) (mmodel.Conne
 		transport = customTransport
 	}
 
+	client := &http.Client{
+		Timeout:   requestTimeout,
+		Transport: transport,
+	}
+	referer := parsed.String()
+
 	connector := &cbrConnector{
 		id:       mmodel.DriverCBR,
 		provider: provider,
-		client: &http.Client{
+		http: newHTTPClient(
-			Timeout:   requestTimeout,
+			logger,
-			Transport: transport,
+			client,
+			httpClientOptions{
+				userAgent: userAgent,
+				accept:    acceptHeader,
+				referer:   referer,
 			},
+		),
 		base:          strings.TrimRight(parsed.String(), "/"),
 		dailyPath:     dailyPath,
 		directoryPath: directoryPath,
@@ -161,20 +180,32 @@ func (c *cbrConnector) refreshDirectory() error {
 		return err
 	}
 
-	req, err := http.NewRequest(http.MethodGet, endpoint, nil)
+	req, err := c.http.NewRequest(context.Background(), http.MethodGet, endpoint)
 	if err != nil {
 		return merrors.InternalWrap(err, "cbr: build directory request")
 	}
 
-	resp, err := c.client.Do(req)
+	resp, err := c.http.Do(req)
 	if err != nil {
-		c.logger.Warn("CBR directory request failed", zap.Error(err))
+		c.logger.Warn(
+			"CBR directory request failed",
+			zap.Error(err),
+			zap.String("endpoint", endpoint),
+			zap.String("referer", c.http.headerValue("Referer")),
+			zap.String("user_agent", c.http.headerValue("User-Agent")),
+		)
 		return merrors.InternalWrap(err, "cbr: directory request failed")
 	}
 	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {
-		c.logger.Warn("CBR directory returned non-OK status", zap.Int("status", resp.StatusCode))
+		c.logger.Warn(
+			"CBR directory returned non-OK status",
+			zap.Int("status", resp.StatusCode),
+			zap.String("endpoint", endpoint),
+			zap.String("referer", c.http.headerValue("Referer")),
+			zap.String("user_agent", c.http.headerValue("User-Agent")),
+		)
 		return merrors.Internal("cbr: unexpected status " + strconv.Itoa(resp.StatusCode))
 	}
 
@@ -183,12 +214,13 @@ func (c *cbrConnector) refreshDirectory() error {
 
 	var directory valuteDirectory
 	if err := decoder.Decode(&directory); err != nil {
-		c.logger.Warn("CBR directory decode failed", zap.Error(err))
+		c.logger.Warn("CBR directory decode failed", zap.Error(err), zap.String("endpoint", endpoint))
 		return merrors.InternalWrap(err, "cbr: decode directory")
 	}
 
-	mapping, err := buildValuteMapping(directory.Items)
+	mapping, err := buildValuteMapping(c.logger.Named("mapper"), directory.Items)
 	if err != nil {
+		c.logger.Warn("Failed to build currencies mapping", zap.Error(err), zap.String("endpoint", endpoint))
 		return err
 	}
 
@@ -200,23 +232,32 @@ func (c *cbrConnector) refreshDirectory() error {
 func (c *cbrConnector) fetchDailyRate(ctx context.Context, valute valuteInfo) (string, error) {
 	endpoint, err := c.buildURL(c.dailyPath, nil)
 	if err != nil {
+		c.logger.Warn("Failed to build daily fetch URL", zap.Error(err), zap.String("path", c.dailyPath))
 		return "", err
 	}
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
+	req, err := c.http.NewRequest(ctx, http.MethodGet, endpoint)
 	if err != nil {
+		c.logger.Warn("Failed to request daily rate", zap.Error(err), zap.String("endpoint", endpoint))
 		return "", merrors.InternalWrap(err, "cbr: build daily request")
 	}
 
-	resp, err := c.client.Do(req)
+	resp, err := c.http.Do(req)
 	if err != nil {
-		c.logger.Warn("CBR daily request failed", zap.String("currency", valute.ISOCharCode), zap.Error(err))
+		c.logger.Warn("CBR daily request failed",
+			zap.Error(err), zap.String("currency", valute.ISOCharCode),
+			zap.String("endpoint", endpoint), zap.String("referer", c.http.headerValue("Referer")),
+			zap.String("user_agent", c.http.headerValue("User-Agent")),
+		)
 		return "", merrors.InternalWrap(err, "cbr: daily request failed")
 	}
 	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {
-		c.logger.Warn("CBR daily returned non-OK status", zap.Int("status", resp.StatusCode))
+		c.logger.Warn(
+			"CBR daily returned non-OK status", zap.Int("status", resp.StatusCode),
+			zap.String("currency", valute.ISOCharCode), zap.String("endpoint", endpoint),
+		)
 		return "", merrors.Internal("cbr: unexpected status " + strconv.Itoa(resp.StatusCode))
 	}
 
@@ -225,7 +266,9 @@ func (c *cbrConnector) fetchDailyRate(ctx context.Context, valute valuteInfo) (s
 
 	var payload dailyRates
 	if err := decoder.Decode(&payload); err != nil {
-		c.logger.Warn("CBR daily decode failed", zap.Error(err))
+		c.logger.Warn("CBR daily decode failed", zap.Error(err),
+			zap.String("currency", valute.ISOCharCode), zap.String("endpoint", endpoint),
+		)
 		return "", merrors.InternalWrap(err, "cbr: decode daily response")
 	}
 
@@ -247,25 +290,40 @@ func (c *cbrConnector) fetchHistoricalRate(ctx context.Context, valute valuteInf
 		"date_req2": date.Format("02/01/2006"),
 		"VAL_NM_RQ": valute.ID,
 	}
+	dateStr := date.Format("2006-01-02")
 	endpoint, err := c.buildURL(c.dynamicPath, query)
 	if err != nil {
 		return "", err
 	}
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
+	req, err := c.http.NewRequest(ctx, http.MethodGet, endpoint)
 	if err != nil {
 		return "", merrors.InternalWrap(err, "cbr: build historical request")
 	}
 
-	resp, err := c.client.Do(req)
+	resp, err := c.http.Do(req)
 	if err != nil {
-		c.logger.Warn("CBR historical request failed", zap.String("currency", valute.ISOCharCode), zap.Error(err))
+		c.logger.Warn(
+			"CBR historical request failed",
+			zap.String("currency", valute.ISOCharCode),
+			zap.String("date", dateStr),
+			zap.String("endpoint", endpoint),
+			zap.String("referer", c.http.headerValue("Referer")),
+			zap.String("user_agent", c.http.headerValue("User-Agent")),
+			zap.Error(err),
+		)
 		return "", merrors.InternalWrap(err, "cbr: historical request failed")
 	}
 	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {
-		c.logger.Warn("CBR historical returned non-OK status", zap.Int("status", resp.StatusCode))
+		c.logger.Warn(
+			"CBR historical returned non-OK status",
+			zap.Int("status", resp.StatusCode),
+			zap.String("currency", valute.ISOCharCode),
+			zap.String("date", dateStr),
+			zap.String("endpoint", endpoint),
+		)
 		return "", merrors.Internal("cbr: unexpected status " + strconv.Itoa(resp.StatusCode))
 	}
 
@@ -274,7 +332,13 @@ func (c *cbrConnector) fetchHistoricalRate(ctx context.Context, valute valuteInf
 
 	var payload dynamicRates
 	if err := decoder.Decode(&payload); err != nil {
-		c.logger.Warn("CBR historical decode failed", zap.Error(err))
+		c.logger.Warn(
+			"CBR historical decode failed",
+			zap.String("currency", valute.ISOCharCode),
+			zap.String("date", dateStr),
+			zap.String("endpoint", endpoint),
+			zap.Error(err),
+		)
 		return "", merrors.InternalWrap(err, "cbr: decode historical response")
 	}
 
@@ -337,7 +401,7 @@ type valuteMapping struct {
 	byID  map[string]valuteInfo
 }
 
-func buildValuteMapping(items []valuteItem) (*valuteMapping, error) {
+func buildValuteMapping(logger *zap.Logger, items []valuteItem) (*valuteMapping, error) {
 	byISO := make(map[string]valuteInfo, len(items))
 	byID := make(map[string]valuteInfo, len(items))
 	byNum := make(map[string]string, len(items))
@@ -348,12 +412,19 @@ func buildValuteMapping(items []valuteItem) (*valuteMapping, error) {
 		isoNum := strings.TrimSpace(item.ISONum)
 		name := strings.TrimSpace(item.Name)
 		engName := strings.TrimSpace(item.EngName)
+
 		nominal, err := parseNominal(item.NominalStr)
 		if err != nil {
 			return nil, merrors.InvalidDataType("cbr: parse directory nominal: " + err.Error())
 		}
+
 		if id == "" || isoChar == "" {
-			return nil, merrors.InvalidDataType("cbr: directory contains entry with empty id or iso code")
+			logger.Info("Skipping invalid currency entry",
+				zap.String("id", id),
+				zap.String("iso_char", isoChar),
+				zap.String("name", name),
+			)
+			continue
 		}
 
 		info := valuteInfo{
@@ -365,12 +436,60 @@ func buildValuteMapping(items []valuteItem) (*valuteMapping, error) {
 			Nominal:     nominal,
 		}
 
-		if existing, ok := byISO[isoChar]; ok && existing.ID != id {
+		// Handle duplicate ISO char codes (e.g. DEM with different IDs / nominals).
-			return nil, merrors.InvalidDataType("cbr: duplicate ISO code " + isoChar)
+		if existing, ok := byISO[isoChar]; ok {
+			// Same ISO + same ID: duplicate entry, just ignore.
+			if existing.ID == id {
+				logger.Debug("Duplicate directory entry for same ISO and ID, ignoring",
+					zap.String("iso_code", isoChar),
+					zap.String("id", id),
+				)
+				continue
 			}
-		if existing, ok := byID[id]; ok && existing.ISOCharCode != isoChar {
+
-			return nil, merrors.InvalidDataType("cbr: duplicate valute id " + id)
+			// Different IDs but same ISO char.
+			// Choose canonical entry:
+			//  1) Prefer nominal == 1
+			//  2) Otherwise prefer smaller nominal
+			keepExisting := true
+
+			if existing.Nominal != 1 && info.Nominal == 1 {
+				keepExisting = false
+			} else if existing.Nominal == 1 && info.Nominal != 1 {
+				keepExisting = true
+			} else if info.Nominal < existing.Nominal {
+				keepExisting = false
 			}
+
+			if keepExisting {
+				logger.Warn("Ignoring duplicate ISO currency entry with less preferred nominal",
+					zap.String("iso_code", isoChar),
+					zap.String("existing_id", existing.ID),
+					zap.Int64("existing_nominal", existing.Nominal),
+					zap.String("new_id", info.ID),
+					zap.Int64("new_nominal", info.Nominal),
+				)
+				// We keep the old one, just skip the new.
+				continue
+			}
+
+			// Replace existing mapping with the new, more canonical one.
+			logger.Warn("Replacing currency mapping due to more canonical nominal",
+				zap.String("iso_code", isoChar),
+				zap.String("old_id", existing.ID),
+				zap.Int64("old_nominal", existing.Nominal),
+				zap.String("new_id", info.ID),
+				zap.Int64("new_nominal", info.Nominal),
+			)
+
+			// Update byID: drop old ID, add new one
+			delete(byID, existing.ID)
+			byID[id] = info
+
+			// Update ISO mapping
+			byISO[isoChar] = info
+
+			// Update numeric-code index if present
 			if isoNum != "" {
 				if existingID, ok := byNum[isoNum]; ok && existingID != id {
 					return nil, merrors.InvalidDataType("cbr: duplicate ISO numeric code " + isoNum)
@@ -378,6 +497,24 @@ func buildValuteMapping(items []valuteItem) (*valuteMapping, error) {
 				byNum[isoNum] = id
 			}
 
+			continue
+		}
+
+		// No existing ISO entry, do normal uniqueness checks.
+
+		if existing, ok := byID[id]; ok && existing.ISOCharCode != isoChar {
+			return nil, merrors.InvalidDataType("cbr: duplicate valute id " + id)
+		}
+
+		if isoNum != "" {
+			if existingID, ok := byNum[isoNum]; ok && existingID != id {
+				return nil, merrors.InvalidDataType("cbr: duplicate ISO numeric code " + isoNum)
+			}
+			byNum[isoNum] = id
+		}
+
+		logger.Info("Installing currency code", zap.String("iso_code", isoChar), zap.String("id", id), zap.Int64("nominal", nominal))
+
 		byISO[isoChar] = info
 		byID[id] = info
 	}

api/fx/ingestor/internal/market/cbr/http_client.go

@@ -0,0 +1,85 @@
+package cbr
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"go.uber.org/zap"
+)
+
+const (
+	defaultUserAgent = "Mozilla/5.0 (compatible; SendicoFX/1.0; +https://app.sendico.io)"
+	defaultAccept    = "application/xml,text/xml;q=0.9,*/*;q=0.8"
+)
+
+// httpClient wraps http.Client to ensure CBR requests always carry required headers.
+type httpClient struct {
+	client  *http.Client
+	headers http.Header
+	logger  *zap.Logger
+}
+
+type httpClientOptions struct {
+	userAgent string
+	accept    string
+	referer   string
+}
+
+func newHTTPClient(logger *zap.Logger, client *http.Client, opts httpClientOptions) *httpClient {
+	userAgent := opts.userAgent
+	if strings.TrimSpace(userAgent) == "" {
+		userAgent = defaultUserAgent
+	}
+
+	accept := opts.accept
+	if strings.TrimSpace(accept) == "" {
+		accept = defaultAccept
+	}
+
+	referer := opts.referer
+	if strings.TrimSpace(referer) == "" {
+		referer = defaultCBRBaseURL
+	}
+	l := logger.Named("http_client")
+
+	headers := make(http.Header, 3)
+	headers.Set("User-Agent", userAgent)
+	headers.Set("Accept", accept)
+	headers.Set("Referer", referer)
+
+	l.Info("HTTP client initialized", zap.String("user_agent", userAgent),
+		zap.String("accept", accept), zap.String("referrer", referer))
+
+	return &httpClient{
+		client:  client,
+		headers: headers,
+		logger:  l,
+	}
+}
+
+func (h *httpClient) NewRequest(ctx context.Context, method, endpoint string) (*http.Request, error) {
+	return http.NewRequestWithContext(ctx, method, endpoint, nil)
+}
+
+func (h *httpClient) Do(req *http.Request) (*http.Response, error) {
+	enriched := req.Clone(req.Context())
+	for key, values := range h.headers {
+		if enriched.Header.Get(key) != "" {
+			continue
+		}
+		for _, value := range values {
+			enriched.Header.Add(key, value)
+		}
+	}
+	r, err := h.client.Do(enriched)
+	if err != nil {
+		h.logger.Warn("HTTP request failed", zap.Error(err), zap.String("method", req.Method),
+			zap.String("url", req.URL.String()))
+	}
+	return r, err
+}
+
+func (h *httpClient) headerValue(name string) string {
+	return h.headers.Get(name)
+}

api/fx/ingestor/main.go

@@ -40,15 +40,15 @@ func main() {
 
 	application, err := app.New(logger, *configFile)
 	if err != nil {
-		logger.Fatal("Failed to initialise application", zap.Error(err))
+		logger.Error("Failed to initialise application", zap.Error(err))
-	}
+	} else {
-
 		if err := application.Run(ctx); err != nil {
 			if errors.Is(err, context.Canceled) {
 				logger.Info("FX ingestor stopped")
 				return
 			}
-		logger.Fatal("Ingestor terminated with error", zap.Error(err))
+			logger.Error("Ingestor terminated with error", zap.Error(err))
+		}
 	}
 
 	logger.Info("FX ingestor stopped")

api/fx/oracle/go.mod

@@ -13,8 +13,8 @@ require (
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver v1.17.6
 	go.uber.org/zap v1.27.1
-	google.golang.org/grpc v1.77.0
+	google.golang.org/grpc v1.78.0
-	google.golang.org/protobuf v1.36.10
+	google.golang.org/protobuf v1.36.11
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -33,7 +33,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
@@ -50,5 +50,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
 )

api/fx/oracle/go.sum

@@ -95,8 +95,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -212,12 +212,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/fx/oracle/internal/service/oracle/calculator.go

@@ -8,9 +8,9 @@ import (
 	"github.com/google/uuid"
 	"github.com/tech/sendico/fx/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
+	smodel "github.com/tech/sendico/pkg/model"
 	fxv1 "github.com/tech/sendico/pkg/proto/common/fx/v1"
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
-	tracev1 "github.com/tech/sendico/pkg/proto/common/trace/v1"
 	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 )
@@ -138,11 +138,11 @@ func (qc *quoteComputation) buildModelQuote(firm bool, expiryMillis int64, req *
 		Pair:     qc.pair.Pair,
 		Side:     qc.sideModel,
 		Price:    formatRat(qc.priceRounded, qc.priceScale),
-		BaseAmount: model.Money{
+		BaseAmount: smodel.Money{
 			Currency: qc.pair.Pair.Base,
 			Amount:   formatRat(qc.baseRounded, qc.baseScale),
 		},
-		QuoteAmount: model.Money{
+		QuoteAmount: smodel.Money{
 			Currency: qc.pair.Pair.Quote,
 			Amount:   formatRat(qc.quoteRounded, qc.quoteScale),
 		},
@@ -170,10 +170,13 @@ func buildQuoteMeta(meta *oraclev1.RequestMeta) *model.QuoteMeta {
 	}
 	trace := meta.GetTrace()
 	qm := &model.QuoteMeta{
-		RequestRef:     deriveRequestRef(meta, trace),
 		TenantRef: meta.GetTenantRef(),
-		TraceRef:       deriveTraceRef(meta, trace),
+	}
-		IdempotencyKey: deriveIdempotencyKey(meta, trace),
+
+	if trace != nil {
+		qm.RequestRef = trace.GetRequestRef()
+		qm.TraceRef = trace.GetTraceRef()
+		qm.IdempotencyKey = trace.GetIdempotencyKey()
 	}
 	if org := strings.TrimSpace(meta.GetOrganizationRef()); org != "" {
 		if objID, err := primitive.ObjectIDFromHex(org); err == nil {
@@ -200,24 +203,3 @@ func computeExpiry(now time.Time, ttlMs int64) (int64, error) {
 	}
 	return now.Add(time.Duration(ttlMs) * time.Millisecond).UnixMilli(), nil
 }
-
-func deriveRequestRef(meta *oraclev1.RequestMeta, trace *tracev1.TraceContext) string {
-	if trace != nil && trace.GetRequestRef() != "" {
-		return trace.GetRequestRef()
-	}
-	return meta.GetRequestRef()
-}
-
-func deriveTraceRef(meta *oraclev1.RequestMeta, trace *tracev1.TraceContext) string {
-	if trace != nil && trace.GetTraceRef() != "" {
-		return trace.GetTraceRef()
-	}
-	return meta.GetTraceRef()
-}
-
-func deriveIdempotencyKey(meta *oraclev1.RequestMeta, trace *tracev1.TraceContext) string {
-	if trace != nil && trace.GetIdempotencyKey() != "" {
-		return trace.GetIdempotencyKey()
-	}
-	return meta.GetIdempotencyKey()
-}

api/fx/oracle/internal/service/oracle/logging.go

@@ -0,0 +1,90 @@
+package oracle
+
+import (
+	"strings"
+
+	fxv1 "github.com/tech/sendico/pkg/proto/common/fx/v1"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	tracev1 "github.com/tech/sendico/pkg/proto/common/trace/v1"
+	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
+	"go.uber.org/zap"
+)
+
+func quoteRequestFields(req *oraclev1.GetQuoteRequest) []zap.Field {
+	if req == nil {
+		return nil
+	}
+	fields := requestMetaFields(req.GetMeta())
+	if pair := req.GetPair(); pair != nil {
+		if base := strings.TrimSpace(pair.GetBase()); base != "" {
+			fields = append(fields, zap.String("pair_base", base))
+		}
+		if quote := strings.TrimSpace(pair.GetQuote()); quote != "" {
+			fields = append(fields, zap.String("pair_quote", quote))
+		}
+	}
+	if side := req.GetSide(); side != fxv1.Side_SIDE_UNSPECIFIED {
+		fields = append(fields, zap.String("side", side.String()))
+	}
+	if req.GetFirm() {
+		fields = append(fields, zap.Bool("firm", req.GetFirm()))
+	}
+	if ttl := req.GetTtlMs(); ttl > 0 {
+		fields = append(fields, zap.Int64("ttl_ms", ttl))
+	}
+	if maxAge := req.GetMaxAgeMs(); maxAge > 0 {
+		fields = append(fields, zap.Int32("max_age_ms", maxAge))
+	}
+	if provider := strings.TrimSpace(req.GetPreferredProvider()); provider != "" {
+		fields = append(fields, zap.String("preferred_provider", provider))
+	}
+	fields = append(fields, moneyFields("base_amount", req.GetBaseAmount())...)
+	fields = append(fields, moneyFields("quote_amount", req.GetQuoteAmount())...)
+	return fields
+}
+
+func requestMetaFields(meta *oraclev1.RequestMeta) []zap.Field {
+	if meta == nil {
+		return nil
+	}
+	fields := make([]zap.Field, 0, 4)
+	if org := strings.TrimSpace(meta.GetOrganizationRef()); org != "" {
+		fields = append(fields, zap.String("organization_ref", org))
+	}
+	if tenant := strings.TrimSpace(meta.GetTenantRef()); tenant != "" {
+		fields = append(fields, zap.String("tenant_ref", tenant))
+	}
+	fields = append(fields, traceFields(meta.GetTrace())...)
+	return fields
+}
+
+func moneyFields(prefix string, money *moneyv1.Money) []zap.Field {
+	if money == nil {
+		return nil
+	}
+	fields := make([]zap.Field, 0, 2)
+	if amt := strings.TrimSpace(money.GetAmount()); amt != "" {
+		fields = append(fields, zap.String(prefix, amt))
+	}
+	if ccy := strings.TrimSpace(money.GetCurrency()); ccy != "" {
+		fields = append(fields, zap.String(prefix+"_currency", ccy))
+	}
+	return fields
+}
+
+func traceFields(trace *tracev1.TraceContext) []zap.Field {
+	if trace == nil {
+		return nil
+	}
+	fields := make([]zap.Field, 0, 3)
+	if ref := strings.TrimSpace(trace.GetTraceRef()); ref != "" {
+		fields = append(fields, zap.String("trace_ref", ref))
+	}
+	if idem := strings.TrimSpace(trace.GetIdempotencyKey()); idem != "" {
+		fields = append(fields, zap.String("idempotency_key", idem))
+	}
+	if req := strings.TrimSpace(trace.GetRequestRef()); req != "" {
+		fields = append(fields, zap.String("request_ref", req))
+	}
+	return fields
+}

api/fx/oracle/internal/service/oracle/math.go

@@ -3,7 +3,6 @@ package oracle
 import (
 	"math/big"
 	"strings"
-	"time"
 
 	"github.com/tech/sendico/fx/storage/model"
 	"github.com/tech/sendico/pkg/decimal"
@@ -61,7 +60,3 @@ func priceFromRate(rate *model.RateSnapshot, side fxv1.Side) (*big.Rat, error) {
 
 	return ratFromString(priceStr)
 }
-
-func timeFromUnixMilli(ms int64) time.Time {
-	return time.Unix(0, ms*int64(time.Millisecond))
-}

api/fx/oracle/internal/service/oracle/service.go

@@ -101,22 +101,27 @@ func (s *Service) getQuoteResponder(ctx context.Context, req *oraclev1.GetQuoteR
 	if req == nil {
 		req = &oraclev1.GetQuoteRequest{}
 	}
-	s.logger.Debug("Handling GetQuote", zap.String("pair", req.GetPair().GetBase()+"/"+req.GetPair().GetQuote()), zap.Bool("firm", req.GetFirm()))
+	logger := s.logger.With(quoteRequestFields(req)...)
+	logger.Debug("Handling GetQuote")
 	if req.GetSide() == fxv1.Side_SIDE_UNSPECIFIED {
+		logger.Warn("GetQuote invalid: side missing")
 		return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, errSideRequired)
 	}
 	if req.GetBaseAmount() != nil && req.GetQuoteAmount() != nil {
+		logger.Warn("GetQuote invalid: both base_amount and quote_amount provided")
 		return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, errAmountsMutuallyExclusive)
 	}
 	if req.GetBaseAmount() == nil && req.GetQuoteAmount() == nil {
+		logger.Warn("GetQuote invalid: amount missing")
 		return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, errAmountRequired)
 	}
 	if err := s.pingStorage(ctx); err != nil {
-		s.logger.Warn("Storage unavailable during GetQuote", zap.Error(err))
+		logger.Warn("Storage unavailable during GetQuote", zap.Error(err))
 		return gsresponse.Unavailable[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 	}
 	pairMsg := req.GetPair()
 	if pairMsg == nil || strings.TrimSpace(pairMsg.GetBase()) == "" || strings.TrimSpace(pairMsg.GetQuote()) == "" {
+		logger.Warn("GetQuote invalid: pair missing")
 		return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, errEmptyRequest)
 	}
 	pairKey := model.CurrencyPair{Base: strings.ToUpper(pairMsg.GetBase()), Quote: strings.ToUpper(pairMsg.GetQuote())}
@@ -125,8 +130,10 @@ func (s *Service) getQuoteResponder(ctx context.Context, req *oraclev1.GetQuoteR
 	if err != nil {
 		switch {
 		case errors.Is(err, merrors.ErrNoData):
+			logger.Warn("pair not supported", zap.String("pair", pairKey.Base+"/"+pairKey.Quote))
 			return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, merrors.InvalidArgument("pair_not_supported"))
 		default:
+			logger.Warn("GetQuote failed to load pair", zap.Error(err))
 			return gsresponse.Internal[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 		}
 	}
@@ -143,8 +150,10 @@ func (s *Service) getQuoteResponder(ctx context.Context, req *oraclev1.GetQuoteR
 	if err != nil {
 		switch {
 		case errors.Is(err, merrors.ErrNoData):
+			logger.Warn("rate not found", zap.String("pair", pairKey.Base+"/"+pairKey.Quote), zap.String("provider", provider))
 			return gsresponse.FailedPrecondition[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, "rate_not_found", err)
 		default:
+			logger.Warn("GetQuote failed to load rate", zap.Error(err), zap.String("pair", pairKey.Base+"/"+pairKey.Quote), zap.String("provider", provider))
 			return gsresponse.Internal[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 		}
 	}
@@ -153,27 +162,31 @@ func (s *Service) getQuoteResponder(ctx context.Context, req *oraclev1.GetQuoteR
 	if maxAge := req.GetMaxAgeMs(); maxAge > 0 {
 		age := now.UnixMilli() - rate.AsOfUnixMs
 		if age > int64(maxAge) {
-			s.logger.Warn("Rate snapshot stale", zap.Int64("age_ms", age), zap.Int32("max_age_ms", req.GetMaxAgeMs()), zap.String("pair", pairKey.Base+"/"+pairKey.Quote), zap.String("provider", provider))
+			logger.Warn("Rate snapshot stale", zap.Int64("age_ms", age), zap.Int32("max_age_ms", req.GetMaxAgeMs()), zap.String("pair", pairKey.Base+"/"+pairKey.Quote), zap.String("provider", provider))
 			return gsresponse.FailedPrecondition[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, "stale_rate", merrors.InvalidArgument("rate older than allowed window"))
 		}
 	}
 
 	comp, err := newQuoteComputation(pair, rate, req.GetSide(), provider)
 	if err != nil {
+		logger.Warn("GetQuote invalid input", zap.Error(err))
 		return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 	}
 
 	if req.GetBaseAmount() != nil {
 		if err := comp.withBaseInput(req.GetBaseAmount()); err != nil {
+			logger.Warn("GetQuote invalid base input", zap.Error(err))
 			return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 		}
 	} else if req.GetQuoteAmount() != nil {
 		if err := comp.withQuoteInput(req.GetQuoteAmount()); err != nil {
+			logger.Warn("GetQuote invalid quote input", zap.Error(err))
 			return gsresponse.InvalidArgument[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 		}
 	}
 
 	if err := comp.compute(); err != nil {
+		logger.Warn("GetQuote computation failed", zap.Error(err))
 		return gsresponse.Internal[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 	}
 
@@ -195,12 +208,14 @@ func (s *Service) getQuoteResponder(ctx context.Context, req *oraclev1.GetQuoteR
 		if err := s.storage.Quotes().Issue(ctx, quoteModel); err != nil {
 			switch {
 			case errors.Is(err, merrors.ErrDataConflict):
+				logger.Warn("GetQuote conflict issuing firm quote", zap.Error(err), zap.String("quote_ref", quoteModel.QuoteRef))
 				return gsresponse.Conflict[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 			default:
+				logger.Warn("GetQuote failed to issue firm quote", zap.Error(err), zap.String("quote_ref", quoteModel.QuoteRef))
 				return gsresponse.Internal[oraclev1.GetQuoteResponse](s.logger, mservice.FXOracle, err)
 			}
 		}
-		s.logger.Info("Firm quote stored", zap.String("quote_ref", quoteModel.QuoteRef), zap.String("pair", pairKey.Base+"/"+pairKey.Quote), zap.String("provider", quoteModel.Provider), zap.Int64("expires_at_ms", quoteModel.ExpiresAtUnixMs))
+		logger.Info("Firm quote stored", zap.String("quote_ref", quoteModel.QuoteRef), zap.String("pair", pairKey.Base+"/"+pairKey.Quote), zap.String("provider", quoteModel.Provider), zap.Int64("expires_at_ms", quoteModel.ExpiresAtUnixMs))
 	}
 
 	resp := &oraclev1.GetQuoteResponse{
@@ -214,18 +229,24 @@ func (s *Service) validateQuoteResponder(ctx context.Context, req *oraclev1.Vali
 	if req == nil {
 		req = &oraclev1.ValidateQuoteRequest{}
 	}
-	s.logger.Debug("Handling ValidateQuote", zap.String("quote_ref", req.GetQuoteRef()))
+	logger := s.logger.With(requestMetaFields(req.GetMeta())...)
+	if ref := strings.TrimSpace(req.GetQuoteRef()); ref != "" {
+		logger = logger.With(zap.String("quote_ref", ref))
+	}
+	logger.Debug("Handling ValidateQuote")
 	if req.GetQuoteRef() == "" {
+		logger.Warn("ValidateQuote invalid: quote_ref missing")
 		return gsresponse.InvalidArgument[oraclev1.ValidateQuoteResponse](s.logger, mservice.FXOracle, errQuoteRefRequired)
 	}
 	if err := s.pingStorage(ctx); err != nil {
-		s.logger.Warn("Storage unavailable during ValidateQuote", zap.Error(err))
+		logger.Warn("Storage unavailable during ValidateQuote", zap.Error(err))
 		return gsresponse.Unavailable[oraclev1.ValidateQuoteResponse](s.logger, mservice.FXOracle, err)
 	}
 	quote, err := s.storage.Quotes().GetByRef(ctx, req.GetQuoteRef())
 	if err != nil {
 		switch {
 		case errors.Is(err, merrors.ErrNoData):
+			logger.Warn("ValidateQuote: quote not found", zap.String("quote_ref", req.GetQuoteRef()))
 			resp := &oraclev1.ValidateQuoteResponse{
 				Meta:   buildResponseMeta(req.GetMeta()),
 				Quote:  nil,
@@ -234,6 +255,7 @@ func (s *Service) validateQuoteResponder(ctx context.Context, req *oraclev1.Vali
 			}
 			return gsresponse.Success(resp)
 		default:
+			logger.Warn("ValidateQuote failed", zap.Error(err))
 			return gsresponse.Internal[oraclev1.ValidateQuoteResponse](s.logger, mservice.FXOracle, err)
 		}
 	}
@@ -255,6 +277,11 @@ func (s *Service) validateQuoteResponder(ctx context.Context, req *oraclev1.Vali
 		Valid:  valid,
 		Reason: reason,
 	}
+	if !valid {
+		logger.Info("ValidateQuote invalid", zap.String("reason", reason), zap.Bool("firm", quote.Firm))
+	} else {
+		logger.Debug("ValidateQuote valid", zap.Bool("firm", quote.Firm))
+	}
 	return gsresponse.Success(resp)
 }
 
@@ -262,29 +289,43 @@ func (s *Service) consumeQuoteResponder(ctx context.Context, req *oraclev1.Consu
 	if req == nil {
 		req = &oraclev1.ConsumeQuoteRequest{}
 	}
-	s.logger.Debug("Handling ConsumeQuote", zap.String("quote_ref", req.GetQuoteRef()), zap.String("ledger_txn_ref", req.GetLedgerTxnRef()))
+	logger := s.logger.With(requestMetaFields(req.GetMeta())...)
+	if ref := strings.TrimSpace(req.GetQuoteRef()); ref != "" {
+		logger = logger.With(zap.String("quote_ref", ref))
+	}
+	if ledger := strings.TrimSpace(req.GetLedgerTxnRef()); ledger != "" {
+		logger = logger.With(zap.String("ledger_txn_ref", ledger))
+	}
+	logger.Debug("Handling ConsumeQuote")
 	if req.GetQuoteRef() == "" {
+		logger.Warn("ConsumeQuote invalid: quote_ref missing")
 		return gsresponse.InvalidArgument[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, errQuoteRefRequired)
 	}
 	if req.GetLedgerTxnRef() == "" {
+		logger.Warn("ConsumeQuote invalid: ledger_txn_ref missing")
 		return gsresponse.InvalidArgument[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, errLedgerTxnRefRequired)
 	}
 	if err := s.pingStorage(ctx); err != nil {
-		s.logger.Warn("Storage unavailable during ConsumeQuote", zap.Error(err))
+		logger.Warn("Storage unavailable during ConsumeQuote", zap.Error(err))
 		return gsresponse.Unavailable[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, err)
 	}
 	_, err := s.storage.Quotes().Consume(ctx, req.GetQuoteRef(), req.GetLedgerTxnRef(), time.Now())
 	if err != nil {
 		switch {
 		case errors.Is(err, storage.ErrQuoteExpired):
+			logger.Warn("ConsumeQuote failed: expired")
 			return gsresponse.FailedPrecondition[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, "expired", err)
 		case errors.Is(err, storage.ErrQuoteConsumed):
+			logger.Warn("ConsumeQuote failed: already consumed")
 			return gsresponse.FailedPrecondition[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, "consumed", err)
 		case errors.Is(err, storage.ErrQuoteNotFirm):
+			logger.Warn("ConsumeQuote failed: quote not firm")
 			return gsresponse.FailedPrecondition[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, "not_firm", err)
 		case errors.Is(err, merrors.ErrNoData):
+			logger.Warn("ConsumeQuote failed: quote not found")
 			return gsresponse.NotFound[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, err)
 		default:
+			logger.Warn("ConsumeQuote failed", zap.Error(err))
 			return gsresponse.Internal[oraclev1.ConsumeQuoteResponse](s.logger, mservice.FXOracle, err)
 		}
 	}
@@ -294,7 +335,7 @@ func (s *Service) consumeQuoteResponder(ctx context.Context, req *oraclev1.Consu
 		Consumed: true,
 		Reason:   "consumed",
 	}
-	s.logger.Debug("Quote consumed", zap.String("quote_ref", req.GetQuoteRef()), zap.String("ledger_txn_ref", req.GetLedgerTxnRef()))
+	logger.Info("Quote consumed")
 	return gsresponse.Success(resp)
 }
 
@@ -302,13 +343,21 @@ func (s *Service) latestRateResponder(ctx context.Context, req *oraclev1.LatestR
 	if req == nil {
 		req = &oraclev1.LatestRateRequest{}
 	}
-	s.logger.Debug("Handling LatestRate", zap.String("pair", req.GetPair().GetBase()+"/"+req.GetPair().GetQuote()))
+	logger := s.logger.With(requestMetaFields(req.GetMeta())...)
+	if pair := req.GetPair(); pair != nil {
+		logger = logger.With(zap.String("pair_base", strings.TrimSpace(pair.GetBase())), zap.String("pair_quote", strings.TrimSpace(pair.GetQuote())))
+	}
+	if provider := strings.TrimSpace(req.GetProvider()); provider != "" {
+		logger = logger.With(zap.String("provider", provider))
+	}
+	logger.Debug("Handling LatestRate")
 	if err := s.pingStorage(ctx); err != nil {
-		s.logger.Warn("Storage unavailable during LatestRate", zap.Error(err))
+		logger.Warn("Storage unavailable during LatestRate", zap.Error(err))
 		return gsresponse.Unavailable[oraclev1.LatestRateResponse](s.logger, mservice.FXOracle, err)
 	}
 	pairMsg := req.GetPair()
 	if pairMsg == nil || strings.TrimSpace(pairMsg.GetBase()) == "" || strings.TrimSpace(pairMsg.GetQuote()) == "" {
+		logger.Warn("LatestRate invalid: pair missing")
 		return gsresponse.InvalidArgument[oraclev1.LatestRateResponse](s.logger, mservice.FXOracle, errEmptyRequest)
 	}
 	pair := model.CurrencyPair{Base: strings.ToUpper(pairMsg.GetBase()), Quote: strings.ToUpper(pairMsg.GetQuote())}
@@ -317,8 +366,10 @@ func (s *Service) latestRateResponder(ctx context.Context, req *oraclev1.LatestR
 	if err != nil {
 		switch {
 		case errors.Is(err, merrors.ErrNoData):
+			logger.Warn("LatestRate pair not found")
 			return gsresponse.NotFound[oraclev1.LatestRateResponse](s.logger, mservice.FXOracle, err)
 		default:
+			logger.Warn("LatestRate failed to load pair", zap.Error(err))
 			return gsresponse.Internal[oraclev1.LatestRateResponse](s.logger, mservice.FXOracle, err)
 		}
 	}
@@ -335,8 +386,10 @@ func (s *Service) latestRateResponder(ctx context.Context, req *oraclev1.LatestR
 	if err != nil {
 		switch {
 		case errors.Is(err, merrors.ErrNoData):
+			logger.Warn("LatestRate not found", zap.String("provider", provider))
 			return gsresponse.NotFound[oraclev1.LatestRateResponse](s.logger, mservice.FXOracle, err)
 		default:
+			logger.Warn("LatestRate failed", zap.Error(err))
 			return gsresponse.Internal[oraclev1.LatestRateResponse](s.logger, mservice.FXOracle, err)
 		}
 	}
@@ -345,6 +398,7 @@ func (s *Service) latestRateResponder(ctx context.Context, req *oraclev1.LatestR
 		Meta: buildResponseMeta(req.GetMeta()),
 		Rate: rateModelToProto(rate),
 	}
+	logger.Debug("LatestRate succeeded", zap.String("provider", provider), zap.Int64("asof_unix_ms", rate.AsOfUnixMs))
 	return gsresponse.Success(resp)
 }
 
@@ -352,13 +406,15 @@ func (s *Service) listPairsResponder(ctx context.Context, req *oraclev1.ListPair
 	if req == nil {
 		req = &oraclev1.ListPairsRequest{}
 	}
-	s.logger.Debug("Handling ListPairs")
+	logger := s.logger.With(requestMetaFields(req.GetMeta())...)
+	logger.Debug("Handling ListPairs")
 	if err := s.pingStorage(ctx); err != nil {
-		s.logger.Warn("Storage unavailable during ListPairs", zap.Error(err))
+		logger.Warn("Storage unavailable during ListPairs", zap.Error(err))
 		return gsresponse.Unavailable[oraclev1.ListPairsResponse](s.logger, mservice.FXOracle, err)
 	}
 	pairs, err := s.storage.Pairs().ListEnabled(ctx)
 	if err != nil {
+		logger.Warn("ListPairs failed", zap.Error(err))
 		return gsresponse.Internal[oraclev1.ListPairsResponse](s.logger, mservice.FXOracle, err)
 	}
 	result := make([]*oraclev1.PairMeta, 0, len(pairs))
@@ -369,7 +425,7 @@ func (s *Service) listPairsResponder(ctx context.Context, req *oraclev1.ListPair
 		Meta:  buildResponseMeta(req.GetMeta()),
 		Pairs: result,
 	}
-	s.logger.Debug("ListPairs returning metadata", zap.Int("pairs", len(resp.GetPairs())))
+	logger.Debug("ListPairs returning metadata", zap.Int("pairs", len(resp.GetPairs())))
 	return gsresponse.Success(resp)
 }
 

api/fx/oracle/internal/service/oracle/service_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/tech/sendico/fx/storage"
 	"github.com/tech/sendico/fx/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
+	smodel "github.com/tech/sendico/pkg/model"
 	fxv1 "github.com/tech/sendico/pkg/proto/common/fx/v1"
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
 	tracev1 "github.com/tech/sendico/pkg/proto/common/trace/v1"
@@ -381,8 +382,8 @@ func TestServiceValidateQuote(t *testing.T) {
 					Pair:            model.CurrencyPair{Base: "USD", Quote: "EUR"},
 					Side:            model.QuoteSideBuyBaseSellQuote,
 					Price:           "1.10",
-					BaseAmount:      model.Money{Currency: "USD", Amount: "100"},
+					BaseAmount:      smodel.Money{Currency: "USD", Amount: "100"},
-					QuoteAmount:     model.Money{Currency: "EUR", Amount: "110"},
+					QuoteAmount:     smodel.Money{Currency: "EUR", Amount: "110"},
 					ExpiresAtUnixMs: now.UnixMilli(),
 					Status:          model.QuoteStatusIssued,
 				}, nil

api/fx/oracle/internal/service/oracle/transform.go

@@ -4,9 +4,9 @@ import (
 	"strings"
 
 	"github.com/tech/sendico/fx/storage/model"
+	smodel "github.com/tech/sendico/pkg/model"
 	fxv1 "github.com/tech/sendico/pkg/proto/common/fx/v1"
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
-	tracev1 "github.com/tech/sendico/pkg/proto/common/trace/v1"
 	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
 )
 
@@ -15,18 +15,11 @@ func buildResponseMeta(meta *oraclev1.RequestMeta) *oraclev1.ResponseMeta {
 	if meta == nil {
 		return resp
 	}
-	resp.RequestRef = meta.GetRequestRef()
-	resp.TraceRef = meta.GetTraceRef()
 
 	trace := meta.GetTrace()
-	if trace == nil {
+	if trace != nil {
-		trace = &tracev1.TraceContext{
-			RequestRef:     meta.GetRequestRef(),
-			IdempotencyKey: meta.GetIdempotencyKey(),
-			TraceRef:       meta.GetTraceRef(),
-		}
-	}
 		resp.Trace = trace
+	}
 	return resp
 }
 
@@ -49,7 +42,7 @@ func quoteModelToProto(q *model.Quote) *oraclev1.Quote {
 	}
 }
 
-func moneyModelToProto(m *model.Money) *moneyv1.Money {
+func moneyModelToProto(m *smodel.Money) *moneyv1.Money {
 	if m == nil {
 		return nil
 	}

api/fx/storage/go.mod

@@ -28,5 +28,5 @@ require (
 	golang.org/x/crypto v0.46.0 // indirect
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 )

api/fx/storage/go.sum

@@ -169,7 +169,7 @@ golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBn
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

api/fx/storage/model/quote.go

@@ -4,6 +4,7 @@ import (
 	"time"
 
 	"github.com/tech/sendico/pkg/db/storable"
+	"github.com/tech/sendico/pkg/model"
 )
 
 // Quote represents a firm or indicative quote persisted by the oracle.
@@ -16,8 +17,8 @@ type Quote struct {
 	Pair                   CurrencyPair    `bson:"pair" json:"pair"`
 	Side                   QuoteSide       `bson:"side" json:"side"`
 	Price                  string          `bson:"price" json:"price"`
-	BaseAmount             Money           `bson:"baseAmount" json:"baseAmount"`
+	BaseAmount             model.Money     `bson:"baseAmount" json:"baseAmount"`
-	QuoteAmount            Money           `bson:"quoteAmount" json:"quoteAmount"`
+	QuoteAmount            model.Money     `bson:"quoteAmount" json:"quoteAmount"`
 	AmountType             QuoteAmountType `bson:"amountType" json:"amountType"`
 	ExpiresAtUnixMs        int64           `bson:"expiresAtUnixMs" json:"expiresAtUnixMs"`
 	ExpiresAt              *time.Time      `bson:"expiresAt,omitempty" json:"expiresAt,omitempty"`

api/fx/storage/model/types.go

@@ -51,12 +51,6 @@ type CurrencyPair struct {
 	Quote string `bson:"quote" json:"quote"`
 }
 
-// Money represents an exact decimal amount with its currency.
-type Money struct {
-	Currency string `bson:"currency" json:"currency"`
-	Amount   string `bson:"amount" json:"amount"`
-}
-
 // QuoteMeta carries request-scoped metadata associated with a quote.
 type QuoteMeta struct {
 	model.OrganizationBoundBase `bson:",inline" json:",inline"`

api/gateway/chain/config.yml

@@ -34,16 +34,18 @@ messaging:
     reconnect_wait: 5
 
 chains:
-  - name: arbitrum_one
+  - name: tron_mainnet
-    rpc_url_env: CHAIN_GATEWAY_ARBITRUM_RPC_URL
+    chain_id: 728126428 # 0x2b6653dc
+    native_token: TRX
+    rpc_url_env: CHAIN_GATEWAY_RPC_URL
     tokens:
-      - symbol: USDC
-        contract: "0xaf88d065e77c8cc2239327c5edb3a432268e5831"
       - symbol: USDT
-        contract: "0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9"
+        contract: "0xa614f803b6fd780986a42c78ec9c7f77e6ded13c"
+      - symbol: USDC
+        contract: "0x3487b63d30b5b2c87fb7ffa8bcfade38eaac1abe"
 
 service_wallet:
-  chain: arbitrum_one
+  chain: tron_mainnet
   address_env: CHAIN_GATEWAY_SERVICE_WALLET_ADDRESS
   private_key_env: CHAIN_GATEWAY_SERVICE_WALLET_KEY
 
@@ -58,3 +60,4 @@ key_management:
 
 cache:
   wallet_balance_ttl_seconds: 120
+  rpc_request_timeout_seconds: 15

api/gateway/chain/go.mod

@@ -15,14 +15,14 @@ require (
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver v1.17.6
 	go.uber.org/zap v1.27.1
-	google.golang.org/grpc v1.77.0
+	google.golang.org/grpc v1.78.0
-	google.golang.org/protobuf v1.36.10
+	google.golang.org/protobuf v1.36.11
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251208031133-be43a854e4be // indirect
+	github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251223223124-03e3cef63e04 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bits-and-blooms/bitset v1.24.4 // indirect
 	github.com/bmatcuk/doublestar/v4 v4.9.1 // indirect
@@ -60,7 +60,7 @@ require (
 	github.com/mitchellh/go-homedir v1.1.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
@@ -86,5 +86,5 @@ require (
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
 	golang.org/x/time v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
 )

api/gateway/chain/go.sum

@@ -6,8 +6,8 @@ github.com/DataDog/zstd v1.4.5 h1:EndNeuB0l9syBZhut0wns3gV1hL8zX8LIu6ZiVHWLIQ=
 github.com/DataDog/zstd v1.4.5/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
-github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251208031133-be43a854e4be h1:1LtMLkGIqE5IQZ7Vdh4zv8A6LECInKF86/fTVxKxYLE=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251223223124-03e3cef63e04 h1:wCr/SrKzMrtW9wG85ApPfncRr7ajzkRevhsWnCkl2sE=
-github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251208031133-be43a854e4be/go.mod h1:ioLG6R+5bUSO1oeGSDxOV3FADARuMoytZCSX6MEMQkI=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251223223124-03e3cef63e04/go.mod h1:ioLG6R+5bUSO1oeGSDxOV3FADARuMoytZCSX6MEMQkI=
 github.com/VictoriaMetrics/fastcache v1.13.0 h1:AW4mheMR5Vd9FkAPUv+NH6Nhw+fmbTMGMsNAoA/+4G0=
 github.com/VictoriaMetrics/fastcache v1.13.0/go.mod h1:hHXhl4DA2fTL2HTZDJFXWgW0LNjo6B+4aj2Wmng3TjU=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -207,8 +207,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -362,12 +362,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/gateway/chain/internal/server/internal/serverimp.go

@@ -2,6 +2,7 @@ package serverimp
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"strings"
 	"time"
@@ -10,6 +11,8 @@ import (
 	"github.com/tech/sendico/gateway/chain/internal/keymanager"
 	vaultmanager "github.com/tech/sendico/gateway/chain/internal/keymanager/vault"
 	gatewayservice "github.com/tech/sendico/gateway/chain/internal/service/gateway"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/drivers"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/rpcclient"
 	gatewayshared "github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	"github.com/tech/sendico/gateway/chain/storage"
 	gatewaymongo "github.com/tech/sendico/gateway/chain/storage/mongo"
@@ -30,6 +33,8 @@ type Imp struct {
 
 	config *config
 	app    *grpcapp.App[storage.Repository]
+
+	rpcClients *rpcclient.Clients
 }
 
 type config struct {
@@ -84,6 +89,9 @@ func (i *Imp) Shutdown() {
 	defer cancel()
 
 	i.app.Shutdown(ctx)
+	if i.rpcClients != nil {
+		i.rpcClients.Close()
+	}
 }
 
 func (i *Imp) Start() error {
@@ -98,20 +106,34 @@ func (i *Imp) Start() error {
 	}
 
 	cl := i.logger.Named("config")
-	networkConfigs := resolveNetworkConfigs(cl.Named("network"), cfg.Chains)
+	networkConfigs, err := resolveNetworkConfigs(cl.Named("network"), cfg.Chains)
+	if err != nil {
+		i.logger.Error("invalid chain network configuration", zap.Error(err))
+		return err
+	}
+	rpcClients, err := rpcclient.Prepare(context.Background(), i.logger.Named("rpc"), networkConfigs)
+	if err != nil {
+		i.logger.Error("failed to prepare rpc clients", zap.Error(err))
+		return err
+	}
+	i.rpcClients = rpcClients
 	walletConfig := resolveServiceWallet(cl.Named("wallet"), cfg.ServiceWallet)
 	keyManager, err := resolveKeyManager(i.logger.Named("key_manager"), cfg.KeyManagement)
 	if err != nil {
 		return err
 	}
+	driverRegistry, err := drivers.NewRegistry(i.logger.Named("drivers"), networkConfigs)
+	if err != nil {
+		return err
+	}
 
 	serviceFactory := func(logger mlogger.Logger, repo storage.Repository, producer msg.Producer) (grpcapp.Service, error) {
-		executor := gatewayservice.NewOnChainExecutor(logger, keyManager)
 		opts := []gatewayservice.Option{
 			gatewayservice.WithNetworks(networkConfigs),
 			gatewayservice.WithServiceWallet(walletConfig),
 			gatewayservice.WithKeyManager(keyManager),
-			gatewayservice.WithTransferExecutor(executor),
+			gatewayservice.WithRPCClients(rpcClients),
+			gatewayservice.WithDriverRegistry(driverRegistry),
 			gatewayservice.WithSettings(cfg.Settings),
 		}
 		return gatewayservice.NewService(logger, repo, producer, opts...), nil
@@ -157,7 +179,7 @@ func (i *Imp) loadConfig() (*config, error) {
 	return cfg, nil
 }
 
-func resolveNetworkConfigs(logger mlogger.Logger, chains []chainConfig) []gatewayshared.Network {
+func resolveNetworkConfigs(logger mlogger.Logger, chains []chainConfig) ([]gatewayshared.Network, error) {
 	result := make([]gatewayshared.Network, 0, len(chains))
 	for _, chain := range chains {
 		if strings.TrimSpace(chain.Name) == "" {
@@ -166,7 +188,8 @@ func resolveNetworkConfigs(logger mlogger.Logger, chains []chainConfig) []gatewa
 		}
 		rpcURL := strings.TrimSpace(os.Getenv(chain.RPCURLEnv))
 		if rpcURL == "" {
-			logger.Warn("chain RPC endpoint not configured", zap.String("chain", chain.Name), zap.String("env", chain.RPCURLEnv))
+			logger.Error("RPC url not configured", zap.String("chain", chain.Name), zap.String("env", chain.RPCURLEnv))
+			return nil, merrors.InvalidArgument(fmt.Sprintf("chain RPC endpoint not configured (chain=%s env=%s)", chain.Name, chain.RPCURLEnv))
 		}
 		contracts := make([]gatewayshared.TokenContract, 0, len(chain.Tokens))
 		for _, token := range chain.Tokens {
@@ -202,7 +225,7 @@ func resolveNetworkConfigs(logger mlogger.Logger, chains []chainConfig) []gatewa
 			TokenConfigs: contracts,
 		})
 	}
-	return result
+	return result, nil
 }
 
 func resolveServiceWallet(logger mlogger.Logger, cfg serviceWalletConfig) gatewayshared.ServiceWallet {

api/gateway/chain/internal/service/gateway/commands/transfer/deps.go

@@ -2,7 +2,10 @@ package transfer
 
 import (
 	"context"
+	"time"
 
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/drivers"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/rpcclient"
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	"github.com/tech/sendico/gateway/chain/storage"
 	clockpkg "github.com/tech/sendico/pkg/clock"
@@ -11,9 +14,11 @@ import (
 
 type Deps struct {
 	Logger           mlogger.Logger
-	Networks         map[string]shared.Network
+	Drivers          *drivers.Registry
+	Networks         *rpcclient.Registry
 	Storage          storage.Repository
 	Clock            clockpkg.Clock
+	RPCTimeout       time.Duration
 	EnsureRepository func(context.Context) error
 	LaunchExecution  func(transferRef, sourceWalletRef string, network shared.Network)
 }

api/gateway/chain/internal/service/gateway/commands/transfer/destination.go

@@ -43,8 +43,22 @@ func resolveDestination(ctx context.Context, deps Deps, dest *chainv1.TransferDe
 		deps.Logger.Warn("destination external address missing")
 		return model.TransferDestination{}, merrors.InvalidArgument("destination is required")
 	}
+	if deps.Drivers == nil {
+		deps.Logger.Warn("chain drivers missing", zap.String("network", source.Network))
+		return model.TransferDestination{}, merrors.Internal("chain drivers not configured")
+	}
+	chainDriver, err := deps.Drivers.Driver(source.Network)
+	if err != nil {
+		deps.Logger.Warn("unsupported chain driver", zap.String("network", source.Network), zap.Error(err))
+		return model.TransferDestination{}, merrors.InvalidArgument("unsupported chain for wallet")
+	}
+	normalized, err := chainDriver.NormalizeAddress(external)
+	if err != nil {
+		deps.Logger.Warn("invalid external address", zap.Error(err))
+		return model.TransferDestination{}, err
+	}
 	return model.TransferDestination{
-		ExternalAddress: strings.ToLower(external),
+		ExternalAddress: normalized,
 		Memo:            strings.TrimSpace(dest.GetMemo()),
 	}, nil
 }

api/gateway/chain/internal/service/gateway/commands/transfer/destination_address.go

@@ -4,11 +4,12 @@ import (
 	"context"
 	"strings"
 
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
 	"github.com/tech/sendico/gateway/chain/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
 )
 
-func destinationAddress(ctx context.Context, deps Deps, dest model.TransferDestination) (string, error) {
+func destinationAddress(ctx context.Context, deps Deps, chainDriver driver.Driver, dest model.TransferDestination) (string, error) {
 	if ref := strings.TrimSpace(dest.ManagedWalletRef); ref != "" {
 		wallet, err := deps.Storage.Wallets().Get(ctx, ref)
 		if err != nil {
@@ -17,10 +18,10 @@ func destinationAddress(ctx context.Context, deps Deps, dest model.TransferDesti
 		if strings.TrimSpace(wallet.DepositAddress) == "" {
 			return "", merrors.Internal("destination wallet missing deposit address")
 		}
-		return wallet.DepositAddress, nil
+		return chainDriver.NormalizeAddress(wallet.DepositAddress)
 	}
 	if addr := strings.TrimSpace(dest.ExternalAddress); addr != "" {
-		return strings.ToLower(addr), nil
+		return chainDriver.NormalizeAddress(addr)
 	}
 	return "", merrors.InvalidArgument("transfer destination address not resolved")
 }

api/gateway/chain/internal/service/gateway/commands/transfer/fee.go

@@ -3,22 +3,12 @@ package transfer
 import (
 	"context"
 	"errors"
-	"math/big"
 	"strings"
-	"time"
 
-	"github.com/ethereum/go-ethereum"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
-	"github.com/ethereum/go-ethereum/accounts/abi"
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/ethclient"
-	"github.com/shopspring/decimal"
-	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
-	"github.com/tech/sendico/gateway/chain/storage/model"
 	"github.com/tech/sendico/pkg/api/routers/gsresponse"
 	"github.com/tech/sendico/pkg/merrors"
-	"github.com/tech/sendico/pkg/mlogger"
 	"github.com/tech/sendico/pkg/mservice"
-	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
 	"go.uber.org/zap"
 )
@@ -63,11 +53,20 @@ func (c *estimateTransferFeeCommand) Execute(ctx context.Context, req *chainv1.E
 	}
 
 	networkKey := strings.ToLower(strings.TrimSpace(sourceWallet.Network))
-	networkCfg, ok := c.deps.Networks[networkKey]
+	networkCfg, ok := c.deps.Networks.Network(networkKey)
 	if !ok {
 		c.deps.Logger.Warn("unsupported chain", zap.String("network", networkKey))
 		return gsresponse.InvalidArgument[chainv1.EstimateTransferFeeResponse](c.deps.Logger, mservice.ChainGateway, merrors.InvalidArgument("unsupported chain for wallet"))
 	}
+	if c.deps.Drivers == nil {
+		c.deps.Logger.Warn("chain drivers missing", zap.String("network", networkKey))
+		return gsresponse.Internal[chainv1.EstimateTransferFeeResponse](c.deps.Logger, mservice.ChainGateway, merrors.Internal("chain drivers not configured"))
+	}
+	chainDriver, err := c.deps.Drivers.Driver(networkKey)
+	if err != nil {
+		c.deps.Logger.Warn("unsupported chain driver", zap.String("network", networkKey), zap.Error(err))
+		return gsresponse.InvalidArgument[chainv1.EstimateTransferFeeResponse](c.deps.Logger, mservice.ChainGateway, merrors.InvalidArgument("unsupported chain for wallet"))
+	}
 
 	dest, err := resolveDestination(ctx, c.deps, req.GetDestination(), sourceWallet)
 	if err != nil {
@@ -79,13 +78,18 @@ func (c *estimateTransferFeeCommand) Execute(ctx context.Context, req *chainv1.E
 		return gsresponse.InvalidArgument[chainv1.EstimateTransferFeeResponse](c.deps.Logger, mservice.ChainGateway, err)
 	}
 
-	destinationAddress, err := destinationAddress(ctx, c.deps, dest)
+	destinationAddress, err := destinationAddress(ctx, c.deps, chainDriver, dest)
 	if err != nil {
 		c.deps.Logger.Warn("failed to resolve destination address", zap.Error(err))
 		return gsresponse.InvalidArgument[chainv1.EstimateTransferFeeResponse](c.deps.Logger, mservice.ChainGateway, err)
 	}
 
-	feeMoney, err := estimateNetworkFee(ctx, c.deps.Logger, networkCfg, sourceWallet, destinationAddress, amount)
+	driverDeps := driver.Deps{
+		Logger:     c.deps.Logger,
+		Registry:   c.deps.Networks,
+		RPCTimeout: c.deps.RPCTimeout,
+	}
+	feeMoney, err := chainDriver.EstimateFee(ctx, driverDeps, networkCfg, sourceWallet, destinationAddress, amount)
 	if err != nil {
 		c.deps.Logger.Warn("fee estimation failed", zap.Error(err))
 		return gsresponse.Auto[chainv1.EstimateTransferFeeResponse](c.deps.Logger, mservice.ChainGateway, err)
@@ -97,152 +101,3 @@ func (c *estimateTransferFeeCommand) Execute(ctx context.Context, req *chainv1.E
 	}
 	return gsresponse.Success(resp)
 }
-
-func estimateNetworkFee(ctx context.Context, logger mlogger.Logger, network shared.Network, wallet *model.ManagedWallet, destination string, amount *moneyv1.Money) (*moneyv1.Money, error) {
-	rpcURL := strings.TrimSpace(network.RPCURL)
-	if rpcURL == "" {
-		return nil, merrors.InvalidArgument("network rpc url not configured")
-	}
-	if strings.TrimSpace(wallet.ContractAddress) == "" {
-		return nil, merrors.NotImplemented("native token transfers not supported")
-	}
-	if !common.IsHexAddress(wallet.ContractAddress) {
-		return nil, merrors.InvalidArgument("invalid token contract address")
-	}
-	if !common.IsHexAddress(wallet.DepositAddress) {
-		return nil, merrors.InvalidArgument("invalid source wallet address")
-	}
-	if !common.IsHexAddress(destination) {
-		return nil, merrors.InvalidArgument("invalid destination address")
-	}
-
-	client, err := ethclient.DialContext(ctx, rpcURL)
-	if err != nil {
-		return nil, merrors.Internal("failed to connect to rpc: " + err.Error())
-	}
-	defer client.Close()
-
-	timeoutCtx, cancel := context.WithTimeout(ctx, 15*time.Second)
-	defer cancel()
-
-	tokenABI, err := abi.JSON(strings.NewReader(erc20TransferABI))
-	if err != nil {
-		return nil, merrors.Internal("failed to parse erc20 abi: " + err.Error())
-	}
-	tokenAddr := common.HexToAddress(wallet.ContractAddress)
-	toAddr := common.HexToAddress(destination)
-	fromAddr := common.HexToAddress(wallet.DepositAddress)
-
-	decimals, err := erc20Decimals(timeoutCtx, client, tokenABI, tokenAddr)
-	if err != nil {
-		logger.Warn("failed to read token decimals", zap.Error(err))
-		return nil, err
-	}
-
-	amountBase, err := toBaseUnits(strings.TrimSpace(amount.GetAmount()), decimals)
-	if err != nil {
-		return nil, err
-	}
-
-	input, err := tokenABI.Pack("transfer", toAddr, amountBase)
-	if err != nil {
-		return nil, merrors.Internal("failed to encode transfer call: " + err.Error())
-	}
-
-	gasPrice, err := client.SuggestGasPrice(timeoutCtx)
-	if err != nil {
-		return nil, merrors.Internal("failed to suggest gas price: " + err.Error())
-	}
-
-	callMsg := ethereum.CallMsg{
-		From:     fromAddr,
-		To:       &tokenAddr,
-		GasPrice: gasPrice,
-		Data:     input,
-	}
-	gasLimit, err := client.EstimateGas(timeoutCtx, callMsg)
-	if err != nil {
-		return nil, merrors.Internal("failed to estimate gas: " + err.Error())
-	}
-
-	fee := new(big.Int).Mul(gasPrice, new(big.Int).SetUint64(gasLimit))
-	feeDec := decimal.NewFromBigInt(fee, 0)
-
-	currency := strings.ToUpper(strings.TrimSpace(network.NativeToken))
-	if currency == "" {
-		currency = strings.ToUpper(network.Name)
-	}
-
-	return &moneyv1.Money{
-		Currency: currency,
-		Amount:   feeDec.String(),
-	}, nil
-}
-
-func erc20Decimals(ctx context.Context, client *ethclient.Client, tokenABI abi.ABI, token common.Address) (uint8, error) {
-	callData, err := tokenABI.Pack("decimals")
-	if err != nil {
-		return 0, merrors.Internal("failed to encode decimals call: " + err.Error())
-	}
-	msg := ethereum.CallMsg{
-		To:   &token,
-		Data: callData,
-	}
-	output, err := client.CallContract(ctx, msg, nil)
-	if err != nil {
-		return 0, merrors.Internal("decimals call failed: " + err.Error())
-	}
-	values, err := tokenABI.Unpack("decimals", output)
-	if err != nil {
-		return 0, merrors.Internal("failed to unpack decimals: " + err.Error())
-	}
-	if len(values) == 0 {
-		return 0, merrors.Internal("decimals call returned no data")
-	}
-	decimals, ok := values[0].(uint8)
-	if !ok {
-		return 0, merrors.Internal("decimals call returned unexpected type")
-	}
-	return decimals, nil
-}
-
-func toBaseUnits(amount string, decimals uint8) (*big.Int, error) {
-	value, err := decimal.NewFromString(strings.TrimSpace(amount))
-	if err != nil {
-		return nil, merrors.InvalidArgument("invalid amount " + amount + ": " + err.Error())
-	}
-	if value.IsNegative() {
-		return nil, merrors.InvalidArgument("amount must be positive")
-	}
-	multiplier := decimal.NewFromInt(1).Shift(int32(decimals))
-	scaled := value.Mul(multiplier)
-	if !scaled.Equal(scaled.Truncate(0)) {
-		return nil, merrors.InvalidArgument("amount " + amount + " exceeds token precision")
-	}
-	return scaled.BigInt(), nil
-}
-
-const erc20TransferABI = `
-[
-	{
-		"constant": true,
-		"inputs": [],
-		"name": "decimals",
-		"outputs": [{ "name": "", "type": "uint8" }],
-		"payable": false,
-		"stateMutability": "view",
-        "type": "function"
-	},
-	{
-		"constant": false,
-		"inputs": [
-			{ "name": "_to", "type": "address" },
-			{ "name": "_value", "type": "uint256" }
-		],
-		"name": "transfer",
-		"outputs": [{ "name": "", "type": "bool" }],
-		"payable": false,
-		"stateMutability": "nonpayable",
-		"type": "function"
-	}
-]`

api/gateway/chain/internal/service/gateway/commands/transfer/submit.go

@@ -78,7 +78,7 @@ func (c *submitTransferCommand) Execute(ctx context.Context, req *chainv1.Submit
 		return gsresponse.InvalidArgument[chainv1.SubmitTransferResponse](c.deps.Logger, mservice.ChainGateway, merrors.InvalidArgument("organization_ref mismatch with wallet"))
 	}
 	networkKey := strings.ToLower(strings.TrimSpace(sourceWallet.Network))
-	networkCfg, ok := c.deps.Networks[networkKey]
+	networkCfg, ok := c.deps.Networks.Network(networkKey)
 	if !ok {
 		c.deps.Logger.Warn("unsupported chain", zap.String("network", networkKey))
 		return gsresponse.InvalidArgument[chainv1.SubmitTransferResponse](c.deps.Logger, mservice.ChainGateway, merrors.InvalidArgument("unsupported chain for wallet"))

api/gateway/chain/internal/service/gateway/commands/wallet/create.go

@@ -9,6 +9,7 @@ import (
 	"github.com/tech/sendico/gateway/chain/storage/model"
 	"github.com/tech/sendico/pkg/api/routers/gsresponse"
 	"github.com/tech/sendico/pkg/merrors"
+	pkgmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
 	"go.uber.org/zap"
@@ -59,11 +60,20 @@ func (c *createManagedWalletCommand) Execute(ctx context.Context, req *chainv1.C
 		c.deps.Logger.Warn("unsupported chain", zap.Any("chain", asset.GetChain()))
 		return gsresponse.InvalidArgument[chainv1.CreateManagedWalletResponse](c.deps.Logger, mservice.ChainGateway, merrors.InvalidArgument("unsupported chain"))
 	}
-	networkCfg, ok := c.deps.Networks[chainKey]
+	networkCfg, ok := c.deps.Networks.Network(chainKey)
 	if !ok {
 		c.deps.Logger.Warn("unsupported chain in config", zap.String("chain", chainKey))
 		return gsresponse.InvalidArgument[chainv1.CreateManagedWalletResponse](c.deps.Logger, mservice.ChainGateway, merrors.InvalidArgument("unsupported chain"))
 	}
+	if c.deps.Drivers == nil {
+		c.deps.Logger.Warn("chain drivers missing", zap.String("chain", chainKey))
+		return gsresponse.Internal[chainv1.CreateManagedWalletResponse](c.deps.Logger, mservice.ChainGateway, merrors.Internal("chain drivers not configured"))
+	}
+	chainDriver, err := c.deps.Drivers.Driver(chainKey)
+	if err != nil {
+		c.deps.Logger.Warn("unsupported chain driver", zap.String("chain", chainKey), zap.Error(err))
+		return gsresponse.InvalidArgument[chainv1.CreateManagedWalletResponse](c.deps.Logger, mservice.ChainGateway, merrors.InvalidArgument("unsupported chain"))
+	}
 
 	tokenSymbol := strings.ToUpper(strings.TrimSpace(asset.GetTokenSymbol()))
 	if tokenSymbol == "" {
@@ -94,8 +104,37 @@ func (c *createManagedWalletCommand) Execute(ctx context.Context, req *chainv1.C
 		c.deps.Logger.Warn("key manager returned empty address")
 		return gsresponse.Internal[chainv1.CreateManagedWalletResponse](c.deps.Logger, mservice.ChainGateway, merrors.Internal("key manager returned empty address"))
 	}
+	depositAddress, err := chainDriver.FormatAddress(keyInfo.Address)
+	if err != nil {
+		c.deps.Logger.Warn("invalid derived deposit address", zap.String("wallet_ref", walletRef), zap.Error(err))
+		return gsresponse.InvalidArgument[chainv1.CreateManagedWalletResponse](c.deps.Logger, mservice.ChainGateway, err)
+	}
+
+	metadata := shared.CloneMetadata(req.GetMetadata())
+	desc := req.GetDescribable()
+	name := strings.TrimSpace(desc.GetName())
+	if name == "" {
+		name = strings.TrimSpace(metadata["name"])
+	}
+	var description *string
+	if desc != nil && desc.Description != nil {
+		if trimmed := strings.TrimSpace(desc.GetDescription()); trimmed != "" {
+			description = &trimmed
+		}
+	}
+	if description == nil {
+		if trimmed := strings.TrimSpace(metadata["description"]); trimmed != "" {
+			description = &trimmed
+		}
+	}
+	if name == "" {
+		name = walletRef
+	}
 
 	wallet := &model.ManagedWallet{
+		Describable: pkgmodel.Describable{
+			Name: name,
+		},
 		IdempotencyKey:  idempotencyKey,
 		WalletRef:       walletRef,
 		OrganizationRef: organizationRef,
@@ -103,10 +142,13 @@ func (c *createManagedWalletCommand) Execute(ctx context.Context, req *chainv1.C
 		Network:         chainKey,
 		TokenSymbol:     tokenSymbol,
 		ContractAddress: contractAddress,
-		DepositAddress:  strings.ToLower(keyInfo.Address),
+		DepositAddress:  depositAddress,
 		KeyReference:    keyInfo.KeyID,
 		Status:          model.ManagedWalletStatusActive,
-		Metadata:        shared.CloneMetadata(req.GetMetadata()),
+		Metadata:        metadata,
+	}
+	if description != nil {
+		wallet.Describable.Description = description
 	}
 
 	created, err := c.deps.Storage.Wallets().Create(ctx, wallet)

api/gateway/chain/internal/service/gateway/commands/wallet/deps.go

@@ -5,7 +5,8 @@ import (
 	"time"
 
 	"github.com/tech/sendico/gateway/chain/internal/keymanager"
-	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/drivers"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/rpcclient"
 	"github.com/tech/sendico/gateway/chain/storage"
 	clockpkg "github.com/tech/sendico/pkg/clock"
 	"github.com/tech/sendico/pkg/mlogger"
@@ -13,17 +14,20 @@ import (
 
 type Deps struct {
 	Logger           mlogger.Logger
-	Networks         map[string]shared.Network
+	Drivers          *drivers.Registry
+	Networks         *rpcclient.Registry
 	KeyManager       keymanager.Manager
 	Storage          storage.Repository
 	Clock            clockpkg.Clock
 	BalanceCacheTTL  time.Duration
+	RPCTimeout       time.Duration
 	EnsureRepository func(context.Context) error
 }
 
 func (d Deps) WithLogger(name string) Deps {
-	if d.Logger != nil {
+	if d.Logger == nil {
-		d.Logger = d.Logger.Named(name)
+		panic("wallet deps: logger is required")
 	}
+	d.Logger = d.Logger.Named(name)
 	return d
 }

api/gateway/chain/internal/service/gateway/commands/wallet/onchain_balance.go

@@ -2,123 +2,53 @@ package wallet
 
 import (
 	"context"
-	"math/big"
+	"fmt"
 	"strings"
-	"time"
 
-	"github.com/ethereum/go-ethereum"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
-	"github.com/ethereum/go-ethereum/accounts/abi"
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/ethclient"
-	"github.com/shopspring/decimal"
 	"github.com/tech/sendico/gateway/chain/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	"go.uber.org/zap"
 )
 
 func onChainWalletBalance(ctx context.Context, deps Deps, wallet *model.ManagedWallet) (*moneyv1.Money, error) {
-	network := deps.Networks[strings.ToLower(strings.TrimSpace(wallet.Network))]
+	logger := deps.Logger
-	rpcURL := strings.TrimSpace(network.RPCURL)
+	if wallet == nil {
-	if rpcURL == "" {
+		return nil, merrors.InvalidArgument("wallet is required")
-		return nil, merrors.Internal("network rpc url is not configured")
 	}
-	contract := strings.TrimSpace(wallet.ContractAddress)
+	if deps.Networks == nil {
-	if contract == "" || !common.IsHexAddress(contract) {
+		return nil, merrors.Internal("rpc clients not initialised")
-		return nil, merrors.InvalidArgument("invalid contract address")
 	}
-	if wallet.DepositAddress == "" || !common.IsHexAddress(wallet.DepositAddress) {
+	if deps.Drivers == nil {
-		return nil, merrors.InvalidArgument("invalid wallet address")
+		return nil, merrors.Internal("chain drivers not configured")
 	}
 
-	client, err := ethclient.DialContext(ctx, rpcURL)
+	networkKey := strings.ToLower(strings.TrimSpace(wallet.Network))
-	if err != nil {
+	network, ok := deps.Networks.Network(networkKey)
-		return nil, merrors.Internal("failed to connect rpc: " + err.Error())
-	}
-	defer client.Close()
-
-	timeoutCtx, cancel := context.WithTimeout(ctx, 10*time.Second)
-	defer cancel()
-
-	tokenABI, err := abi.JSON(strings.NewReader(erc20ABIJSON))
-	if err != nil {
-		return nil, merrors.Internal("failed to parse erc20 abi: " + err.Error())
-	}
-	tokenAddr := common.HexToAddress(contract)
-	walletAddr := common.HexToAddress(wallet.DepositAddress)
-
-	decimals, err := readDecimals(timeoutCtx, client, tokenABI, tokenAddr)
-	if err != nil {
-		return nil, err
-	}
-
-	bal, err := readBalanceOf(timeoutCtx, client, tokenABI, tokenAddr, walletAddr)
-	if err != nil {
-		return nil, err
-	}
-
-	dec := decimal.NewFromBigInt(bal, 0).Shift(-int32(decimals))
-	return &moneyv1.Money{Currency: wallet.TokenSymbol, Amount: dec.String()}, nil
-}
-
-func readDecimals(ctx context.Context, client *ethclient.Client, tokenABI abi.ABI, token common.Address) (uint8, error) {
-	data, err := tokenABI.Pack("decimals")
-	if err != nil {
-		return 0, merrors.Internal("failed to encode decimals call: " + err.Error())
-	}
-	msg := ethereum.CallMsg{To: &token, Data: data}
-	out, err := client.CallContract(ctx, msg, nil)
-	if err != nil {
-		return 0, merrors.Internal("decimals call failed: " + err.Error())
-	}
-	values, err := tokenABI.Unpack("decimals", out)
-	if err != nil || len(values) == 0 {
-		return 0, merrors.Internal("failed to unpack decimals")
-	}
-	if val, ok := values[0].(uint8); ok {
-		return val, nil
-	}
-	return 0, merrors.Internal("decimals returned unexpected type")
-}
-
-func readBalanceOf(ctx context.Context, client *ethclient.Client, tokenABI abi.ABI, token common.Address, wallet common.Address) (*big.Int, error) {
-	data, err := tokenABI.Pack("balanceOf", wallet)
-	if err != nil {
-		return nil, merrors.Internal("failed to encode balanceOf: " + err.Error())
-	}
-	msg := ethereum.CallMsg{To: &token, Data: data}
-	out, err := client.CallContract(ctx, msg, nil)
-	if err != nil {
-		return nil, merrors.Internal("balanceOf call failed: " + err.Error())
-	}
-	values, err := tokenABI.Unpack("balanceOf", out)
-	if err != nil || len(values) == 0 {
-		return nil, merrors.Internal("failed to unpack balanceOf")
-	}
-	raw, ok := values[0].(*big.Int)
 	if !ok {
-		return nil, merrors.Internal("balanceOf returned unexpected type")
+		logger.Warn("Requested network is not configured",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", networkKey),
+		)
+		return nil, merrors.Internal(fmt.Sprintf("Requested network '%s' is not configured", networkKey))
 	}
-	return decimal.NewFromBigInt(raw, 0).BigInt(), nil
-}
 
-const erc20ABIJSON = `
+	chainDriver, err := deps.Drivers.Driver(networkKey)
-[
+	if err != nil {
-	{
+		logger.Warn("Chain driver not configured",
-		"constant": true,
+			zap.String("wallet_ref", wallet.WalletRef),
-		"inputs": [],
+			zap.String("network", networkKey),
-		"name": "decimals",
+			zap.Error(err),
-		"outputs": [{ "name": "", "type": "uint8" }],
+		)
-		"payable": false,
+		return nil, merrors.InvalidArgument("unsupported chain")
-		"stateMutability": "view",
-        "type": "function"
-	},
-	{
-		"constant": true,
-		"inputs": [{ "name": "_owner", "type": "address" }],
-		"name": "balanceOf",
-		"outputs": [{ "name": "balance", "type": "uint256" }],
-		"payable": false,
-		"stateMutability": "view",
-		"type": "function"
 	}
-]`
+
+	driverDeps := driver.Deps{
+		Logger:     deps.Logger,
+		Registry:   deps.Networks,
+		KeyManager: deps.KeyManager,
+		RPCTimeout: deps.RPCTimeout,
+	}
+	return chainDriver.Balance(ctx, driverDeps, network, wallet)
+}

api/gateway/chain/internal/service/gateway/commands/wallet/proto.go

@@ -1,8 +1,11 @@
 package wallet
 
 import (
+	"strings"
+
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	"github.com/tech/sendico/gateway/chain/storage/model"
+	describablev1 "github.com/tech/sendico/pkg/proto/common/describable/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
@@ -16,6 +19,25 @@ func toProtoManagedWallet(wallet *model.ManagedWallet) *chainv1.ManagedWallet {
 		TokenSymbol:     wallet.TokenSymbol,
 		ContractAddress: wallet.ContractAddress,
 	}
+	name := strings.TrimSpace(wallet.Name)
+	if name == "" {
+		name = strings.TrimSpace(wallet.Metadata["name"])
+	}
+	if name == "" {
+		name = wallet.WalletRef
+	}
+	description := ""
+	switch {
+	case wallet.Description != nil:
+		description = strings.TrimSpace(*wallet.Description)
+	default:
+		description = strings.TrimSpace(wallet.Metadata["description"])
+	}
+	desc := &describablev1.Describable{Name: name}
+	if description != "" {
+		desc.Description = &description
+	}
+
 	return &chainv1.ManagedWallet{
 		WalletRef:       wallet.WalletRef,
 		OrganizationRef: wallet.OrganizationRef,
@@ -26,6 +48,7 @@ func toProtoManagedWallet(wallet *model.ManagedWallet) *chainv1.ManagedWallet {
 		Metadata:        shared.CloneMetadata(wallet.Metadata),
 		CreatedAt:       timestamppb.New(wallet.CreatedAt.UTC()),
 		UpdatedAt:       timestamppb.New(wallet.UpdatedAt.UTC()),
+		Describable:     desc,
 	}
 }
 

api/gateway/chain/internal/service/gateway/driver/arbitrum/driver.go

@@ -0,0 +1,148 @@
+package arbitrum
+
+import (
+	"context"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver/evm"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/gateway/chain/storage/model"
+	"github.com/tech/sendico/pkg/mlogger"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	"go.uber.org/zap"
+)
+
+// Driver implements Arbitrum-specific behavior using the shared EVM logic.
+type Driver struct {
+	logger mlogger.Logger
+}
+
+func New(logger mlogger.Logger) *Driver {
+	return &Driver{logger: logger.Named("arbitrum")}
+}
+
+func (d *Driver) Name() string {
+	return "arbitrum"
+}
+
+func (d *Driver) FormatAddress(address string) (string, error) {
+	d.logger.Debug("format address", zap.String("address", address))
+	normalized, err := evm.NormalizeAddress(address)
+	if err != nil {
+		d.logger.Warn("format address failed", zap.String("address", address), zap.Error(err))
+	}
+	return normalized, err
+}
+
+func (d *Driver) NormalizeAddress(address string) (string, error) {
+	d.logger.Debug("normalize address", zap.String("address", address))
+	normalized, err := evm.NormalizeAddress(address)
+	if err != nil {
+		d.logger.Warn("normalize address failed", zap.String("address", address), zap.Error(err))
+	}
+	return normalized, err
+}
+
+func (d *Driver) Balance(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet) (*moneyv1.Money, error) {
+	d.logger.Debug("balance request",
+		zap.String("wallet_ref", wallet.WalletRef),
+		zap.String("network", network.Name),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	result, err := evm.Balance(ctx, driverDeps, network, wallet, wallet.DepositAddress)
+	if err != nil {
+		d.logger.Warn("balance failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if result != nil {
+		d.logger.Debug("balance result",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.String("amount", result.Amount),
+			zap.String("currency", result.Currency),
+		)
+	}
+	return result, err
+}
+
+func (d *Driver) EstimateFee(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet, destination string, amount *moneyv1.Money) (*moneyv1.Money, error) {
+	d.logger.Debug("estimate fee request",
+		zap.String("wallet_ref", wallet.WalletRef),
+		zap.String("network", network.Name),
+		zap.String("destination", destination),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	result, err := evm.EstimateFee(ctx, driverDeps, network, wallet, wallet.DepositAddress, destination, amount)
+	if err != nil {
+		d.logger.Warn("estimate fee failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if result != nil {
+		d.logger.Debug("estimate fee result",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.String("amount", result.Amount),
+			zap.String("currency", result.Currency),
+		)
+	}
+	return result, err
+}
+
+func (d *Driver) SubmitTransfer(ctx context.Context, deps driver.Deps, network shared.Network, transfer *model.Transfer, source *model.ManagedWallet, destination string) (string, error) {
+	d.logger.Debug("submit transfer request",
+		zap.String("transfer_ref", transfer.TransferRef),
+		zap.String("network", network.Name),
+		zap.String("destination", destination),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	txHash, err := evm.SubmitTransfer(ctx, driverDeps, network, transfer, source, source.DepositAddress, destination)
+	if err != nil {
+		d.logger.Warn("submit transfer failed",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else {
+		d.logger.Debug("submit transfer result",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("network", network.Name),
+			zap.String("tx_hash", txHash),
+		)
+	}
+	return txHash, err
+}
+
+func (d *Driver) AwaitConfirmation(ctx context.Context, deps driver.Deps, network shared.Network, txHash string) (*types.Receipt, error) {
+	d.logger.Debug("await confirmation",
+		zap.String("tx_hash", txHash),
+		zap.String("network", network.Name),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	receipt, err := evm.AwaitConfirmation(ctx, driverDeps, network, txHash)
+	if err != nil {
+		d.logger.Warn("await confirmation failed",
+			zap.String("tx_hash", txHash),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if receipt != nil {
+		d.logger.Debug("await confirmation result",
+			zap.String("tx_hash", txHash),
+			zap.String("network", network.Name),
+			zap.Uint64("block_number", receipt.BlockNumber.Uint64()),
+			zap.Uint64("status", receipt.Status),
+		)
+	}
+	return receipt, err
+}
+
+var _ driver.Driver = (*Driver)(nil)

api/gateway/chain/internal/service/gateway/driver/driver.go

@@ -0,0 +1,33 @@
+package driver
+
+import (
+	"context"
+	"time"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/tech/sendico/gateway/chain/internal/keymanager"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/rpcclient"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/gateway/chain/storage/model"
+	"github.com/tech/sendico/pkg/mlogger"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+)
+
+// Deps bundles dependencies shared across chain drivers.
+type Deps struct {
+	Logger     mlogger.Logger
+	Registry   *rpcclient.Registry
+	KeyManager keymanager.Manager
+	RPCTimeout time.Duration
+}
+
+// Driver defines chain-specific behavior for wallet and transfer operations.
+type Driver interface {
+	Name() string
+	FormatAddress(address string) (string, error)
+	NormalizeAddress(address string) (string, error)
+	Balance(ctx context.Context, deps Deps, network shared.Network, wallet *model.ManagedWallet) (*moneyv1.Money, error)
+	EstimateFee(ctx context.Context, deps Deps, network shared.Network, wallet *model.ManagedWallet, destination string, amount *moneyv1.Money) (*moneyv1.Money, error)
+	SubmitTransfer(ctx context.Context, deps Deps, network shared.Network, transfer *model.Transfer, source *model.ManagedWallet, destination string) (string, error)
+	AwaitConfirmation(ctx context.Context, deps Deps, network shared.Network, txHash string) (*types.Receipt, error)
+}

api/gateway/chain/internal/service/gateway/driver/ethereum/driver.go

@@ -0,0 +1,148 @@
+package ethereum
+
+import (
+	"context"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver/evm"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/gateway/chain/storage/model"
+	"github.com/tech/sendico/pkg/mlogger"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	"go.uber.org/zap"
+)
+
+// Driver implements Ethereum-specific behavior using the shared EVM logic.
+type Driver struct {
+	logger mlogger.Logger
+}
+
+func New(logger mlogger.Logger) *Driver {
+	return &Driver{logger: logger.Named("ethereum")}
+}
+
+func (d *Driver) Name() string {
+	return "ethereum"
+}
+
+func (d *Driver) FormatAddress(address string) (string, error) {
+	d.logger.Debug("format address", zap.String("address", address))
+	normalized, err := evm.NormalizeAddress(address)
+	if err != nil {
+		d.logger.Warn("format address failed", zap.String("address", address), zap.Error(err))
+	}
+	return normalized, err
+}
+
+func (d *Driver) NormalizeAddress(address string) (string, error) {
+	d.logger.Debug("normalize address", zap.String("address", address))
+	normalized, err := evm.NormalizeAddress(address)
+	if err != nil {
+		d.logger.Warn("normalize address failed", zap.String("address", address), zap.Error(err))
+	}
+	return normalized, err
+}
+
+func (d *Driver) Balance(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet) (*moneyv1.Money, error) {
+	d.logger.Debug("balance request",
+		zap.String("wallet_ref", wallet.WalletRef),
+		zap.String("network", network.Name),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	result, err := evm.Balance(ctx, driverDeps, network, wallet, wallet.DepositAddress)
+	if err != nil {
+		d.logger.Warn("balance failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if result != nil {
+		d.logger.Debug("balance result",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.String("amount", result.Amount),
+			zap.String("currency", result.Currency),
+		)
+	}
+	return result, err
+}
+
+func (d *Driver) EstimateFee(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet, destination string, amount *moneyv1.Money) (*moneyv1.Money, error) {
+	d.logger.Debug("estimate fee request",
+		zap.String("wallet_ref", wallet.WalletRef),
+		zap.String("network", network.Name),
+		zap.String("destination", destination),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	result, err := evm.EstimateFee(ctx, driverDeps, network, wallet, wallet.DepositAddress, destination, amount)
+	if err != nil {
+		d.logger.Warn("estimate fee failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if result != nil {
+		d.logger.Debug("estimate fee result",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.String("amount", result.Amount),
+			zap.String("currency", result.Currency),
+		)
+	}
+	return result, err
+}
+
+func (d *Driver) SubmitTransfer(ctx context.Context, deps driver.Deps, network shared.Network, transfer *model.Transfer, source *model.ManagedWallet, destination string) (string, error) {
+	d.logger.Debug("submit transfer request",
+		zap.String("transfer_ref", transfer.TransferRef),
+		zap.String("network", network.Name),
+		zap.String("destination", destination),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	txHash, err := evm.SubmitTransfer(ctx, driverDeps, network, transfer, source, source.DepositAddress, destination)
+	if err != nil {
+		d.logger.Warn("submit transfer failed",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else {
+		d.logger.Debug("submit transfer result",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("network", network.Name),
+			zap.String("tx_hash", txHash),
+		)
+	}
+	return txHash, err
+}
+
+func (d *Driver) AwaitConfirmation(ctx context.Context, deps driver.Deps, network shared.Network, txHash string) (*types.Receipt, error) {
+	d.logger.Debug("await confirmation",
+		zap.String("tx_hash", txHash),
+		zap.String("network", network.Name),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	receipt, err := evm.AwaitConfirmation(ctx, driverDeps, network, txHash)
+	if err != nil {
+		d.logger.Warn("await confirmation failed",
+			zap.String("tx_hash", txHash),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if receipt != nil {
+		d.logger.Debug("await confirmation result",
+			zap.String("tx_hash", txHash),
+			zap.String("network", network.Name),
+			zap.Uint64("block_number", receipt.BlockNumber.Uint64()),
+			zap.Uint64("status", receipt.Status),
+		)
+	}
+	return receipt, err
+}
+
+var _ driver.Driver = (*Driver)(nil)

api/gateway/chain/internal/service/gateway/driver/evm/evm.go

@@ -0,0 +1,554 @@
+package evm
+
+import (
+	"context"
+	"errors"
+	"math/big"
+	"strings"
+	"time"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/shopspring/decimal"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/gateway/chain/storage/model"
+	"github.com/tech/sendico/pkg/merrors"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	"go.uber.org/zap"
+)
+
+var (
+	erc20ABI abi.ABI
+)
+
+func init() {
+	var err error
+	erc20ABI, err = abi.JSON(strings.NewReader(erc20ABIJSON))
+	if err != nil {
+		panic("evm driver: failed to parse erc20 abi: " + err.Error())
+	}
+}
+
+const erc20ABIJSON = `
+[
+	{
+		"constant": false,
+		"inputs": [
+			{ "name": "_to", "type": "address" },
+			{ "name": "_value", "type": "uint256" }
+		],
+		"name": "transfer",
+		"outputs": [{ "name": "", "type": "bool" }],
+		"payable": false,
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"constant": true,
+		"inputs": [],
+		"name": "decimals",
+		"outputs": [{ "name": "", "type": "uint8" }],
+		"payable": false,
+		"stateMutability": "view",
+        "type": "function"
+	}
+]`
+
+// NormalizeAddress validates and normalizes EVM hex addresses.
+func NormalizeAddress(address string) (string, error) {
+	trimmed := strings.TrimSpace(address)
+	if trimmed == "" {
+		return "", merrors.InvalidArgument("address is required")
+	}
+	if !common.IsHexAddress(trimmed) {
+		return "", merrors.InvalidArgument("invalid hex address")
+	}
+	return strings.ToLower(common.HexToAddress(trimmed).Hex()), nil
+}
+
+// Balance fetches ERC20 token balance for the provided address.
+func Balance(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet, address string) (*moneyv1.Money, error) {
+	logger := deps.Logger
+	registry := deps.Registry
+
+	if registry == nil {
+		return nil, merrors.Internal("rpc clients not initialised")
+	}
+	if wallet == nil {
+		return nil, merrors.InvalidArgument("wallet is required")
+	}
+
+	normalizedAddress, err := NormalizeAddress(address)
+	if err != nil {
+		return nil, err
+	}
+
+	rpcURL := strings.TrimSpace(network.RPCURL)
+	logFields := []zap.Field{
+		zap.String("wallet_ref", wallet.WalletRef),
+		zap.String("network", strings.ToLower(strings.TrimSpace(network.Name))),
+		zap.String("token_symbol", strings.ToUpper(strings.TrimSpace(wallet.TokenSymbol))),
+		zap.String("contract", strings.ToLower(strings.TrimSpace(wallet.ContractAddress))),
+		zap.String("wallet_address", normalizedAddress),
+	}
+	if rpcURL == "" {
+		logger.Warn("Network rpc url is not configured", logFields...)
+		return nil, merrors.Internal("network rpc url is not configured")
+	}
+
+	contract := strings.TrimSpace(wallet.ContractAddress)
+	if contract == "" || !common.IsHexAddress(contract) {
+		logger.Warn("Invalid contract address for balance fetch", logFields...)
+		return nil, merrors.InvalidArgument("invalid contract address")
+	}
+
+	logger.Info("Fetching on-chain wallet balance", logFields...)
+
+	rpcClient, err := registry.RPCClient(network.Name)
+	if err != nil {
+		logger.Warn("Failed to fetch rpc client", append(logFields, zap.Error(err))...)
+		return nil, err
+	}
+
+	timeout := deps.RPCTimeout
+	if timeout <= 0 {
+		timeout = 10 * time.Second
+	}
+	timeoutCtx, cancel := context.WithTimeout(ctx, timeout)
+	defer cancel()
+
+	logger.Debug("Calling token decimals", logFields...)
+	decimals, err := readDecimals(timeoutCtx, rpcClient, contract)
+	if err != nil {
+		logger.Warn("Token decimals call failed", append(logFields, zap.Error(err))...)
+		return nil, err
+	}
+
+	logger.Debug("Calling token balanceOf", append(logFields, zap.Uint8("decimals", decimals))...)
+	bal, err := readBalanceOf(timeoutCtx, rpcClient, contract, normalizedAddress)
+	if err != nil {
+		logger.Warn("Token balanceOf call failed", append(logFields, zap.Uint8("decimals", decimals), zap.Error(err))...)
+		return nil, err
+	}
+
+	dec := decimal.NewFromBigInt(bal, 0).Shift(-int32(decimals))
+	logger.Info("On-chain wallet balance fetched",
+		append(logFields,
+			zap.Uint8("decimals", decimals),
+			zap.String("balance_raw", bal.String()),
+			zap.String("balance", dec.String()),
+		)...,
+	)
+	return &moneyv1.Money{Currency: wallet.TokenSymbol, Amount: dec.String()}, nil
+}
+
+// EstimateFee estimates ERC20 transfer fees for the given parameters.
+func EstimateFee(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet, fromAddress, destination string, amount *moneyv1.Money) (*moneyv1.Money, error) {
+	logger := deps.Logger
+	registry := deps.Registry
+
+	if registry == nil {
+		return nil, merrors.Internal("rpc clients not initialised")
+	}
+	if wallet == nil {
+		return nil, merrors.InvalidArgument("wallet is required")
+	}
+	if amount == nil {
+		return nil, merrors.InvalidArgument("amount is required")
+	}
+
+	rpcURL := strings.TrimSpace(network.RPCURL)
+	if rpcURL == "" {
+		return nil, merrors.InvalidArgument("network rpc url not configured")
+	}
+	if strings.TrimSpace(wallet.ContractAddress) == "" {
+		return nil, merrors.NotImplemented("native token transfers not supported")
+	}
+	if !common.IsHexAddress(wallet.ContractAddress) {
+		return nil, merrors.InvalidArgument("invalid token contract address")
+	}
+	if _, err := NormalizeAddress(fromAddress); err != nil {
+		return nil, merrors.InvalidArgument("invalid source wallet address")
+	}
+	if _, err := NormalizeAddress(destination); err != nil {
+		return nil, merrors.InvalidArgument("invalid destination address")
+	}
+
+	client, err := registry.Client(network.Name)
+	if err != nil {
+		return nil, err
+	}
+	rpcClient, err := registry.RPCClient(network.Name)
+	if err != nil {
+		return nil, err
+	}
+
+	timeout := deps.RPCTimeout
+	if timeout <= 0 {
+		timeout = 15 * time.Second
+	}
+	timeoutCtx, cancel := context.WithTimeout(ctx, timeout)
+	defer cancel()
+
+	tokenAddr := common.HexToAddress(wallet.ContractAddress)
+	toAddr := common.HexToAddress(destination)
+	fromAddr := common.HexToAddress(fromAddress)
+
+	decimals, err := erc20Decimals(timeoutCtx, rpcClient, tokenAddr)
+	if err != nil {
+		logger.Warn("Failed to read token decimals", zap.Error(err))
+		return nil, err
+	}
+
+	amountBase, err := toBaseUnits(strings.TrimSpace(amount.GetAmount()), decimals)
+	if err != nil {
+		return nil, err
+	}
+
+	input, err := erc20ABI.Pack("transfer", toAddr, amountBase)
+	if err != nil {
+		return nil, merrors.Internal("failed to encode transfer call: " + err.Error())
+	}
+
+	gasPrice, err := client.SuggestGasPrice(timeoutCtx)
+	if err != nil {
+		return nil, merrors.Internal("failed to suggest gas price: " + err.Error())
+	}
+
+	callMsg := ethereum.CallMsg{
+		From:     fromAddr,
+		To:       &tokenAddr,
+		GasPrice: gasPrice,
+		Data:     input,
+	}
+	gasLimit, err := client.EstimateGas(timeoutCtx, callMsg)
+	if err != nil {
+		return nil, merrors.Internal("failed to estimate gas: " + err.Error())
+	}
+
+	fee := new(big.Int).Mul(gasPrice, new(big.Int).SetUint64(gasLimit))
+	feeDec := decimal.NewFromBigInt(fee, 0)
+
+	currency := strings.ToUpper(strings.TrimSpace(network.NativeToken))
+	if currency == "" {
+		currency = strings.ToUpper(network.Name)
+	}
+
+	return &moneyv1.Money{
+		Currency: currency,
+		Amount:   feeDec.String(),
+	}, nil
+}
+
+// SubmitTransfer submits an ERC20 transfer on an EVM-compatible chain.
+func SubmitTransfer(ctx context.Context, deps driver.Deps, network shared.Network, transfer *model.Transfer, source *model.ManagedWallet, fromAddress, destination string) (string, error) {
+	logger := deps.Logger
+	registry := deps.Registry
+
+	if deps.KeyManager == nil {
+		logger.Warn("Key manager not configured")
+		return "", executorInternal("key manager is not configured", nil)
+	}
+	if registry == nil {
+		return "", executorInternal("rpc clients not initialised", nil)
+	}
+	rpcURL := strings.TrimSpace(network.RPCURL)
+	if rpcURL == "" {
+		logger.Warn("Network rpc url missing", zap.String("network", network.Name))
+		return "", executorInvalid("network rpc url is not configured")
+	}
+	if source == nil || transfer == nil {
+		logger.Warn("Transfer context missing")
+		return "", executorInvalid("transfer context missing")
+	}
+	if strings.TrimSpace(source.KeyReference) == "" {
+		logger.Warn("Source wallet missing key reference", zap.String("wallet_ref", source.WalletRef))
+		return "", executorInvalid("source wallet missing key reference")
+	}
+	if _, err := NormalizeAddress(fromAddress); err != nil {
+		logger.Warn("Invalid source wallet address", zap.String("wallet_ref", source.WalletRef))
+		return "", executorInvalid("invalid source wallet address")
+	}
+	if _, err := NormalizeAddress(destination); err != nil {
+		logger.Warn("Invalid destination address", zap.String("transfer_ref", transfer.TransferRef), zap.String("address", destination))
+		return "", executorInvalid("invalid destination address " + destination)
+	}
+
+	logger.Info("submitting transfer",
+		zap.String("transfer_ref", transfer.TransferRef),
+		zap.String("source_wallet_ref", source.WalletRef),
+		zap.String("network", network.Name),
+		zap.String("destination", strings.ToLower(destination)),
+	)
+
+	client, err := registry.Client(network.Name)
+	if err != nil {
+		logger.Warn("Failed to initialise rpc client", zap.Error(err), zap.String("network", network.Name))
+		return "", err
+	}
+	rpcClient, err := registry.RPCClient(network.Name)
+	if err != nil {
+		logger.Warn("failed to initialise rpc client", zap.String("network", network.Name))
+		return "", err
+	}
+
+	sourceAddress := common.HexToAddress(fromAddress)
+	destinationAddr := common.HexToAddress(destination)
+
+	ctx, cancel := context.WithTimeout(ctx, 60*time.Second)
+	defer cancel()
+
+	nonce, err := client.PendingNonceAt(ctx, sourceAddress)
+	if err != nil {
+		logger.Warn("Failed to fetch nonce", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("wallet_ref", source.WalletRef),
+		)
+		return "", executorInternal("failed to fetch nonce", err)
+	}
+
+	gasPrice, err := client.SuggestGasPrice(ctx)
+	if err != nil {
+		logger.Warn("Failed to suggest gas price", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("network", network.Name),
+		)
+		return "", executorInternal("failed to suggest gas price", err)
+	}
+
+	chainID := new(big.Int).SetUint64(network.ChainID)
+
+	if strings.TrimSpace(transfer.ContractAddress) == "" {
+		logger.Warn("Native token transfer requested but not supported", zap.String("transfer_ref", transfer.TransferRef))
+		return "", merrors.NotImplemented("executor: native token transfers not yet supported")
+	}
+
+	if !common.IsHexAddress(transfer.ContractAddress) {
+		logger.Warn("Invalid token contract address",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("contract", transfer.ContractAddress),
+		)
+		return "", executorInvalid("invalid token contract address " + transfer.ContractAddress)
+	}
+	tokenAddress := common.HexToAddress(transfer.ContractAddress)
+
+	decimals, err := erc20Decimals(ctx, rpcClient, tokenAddress)
+	if err != nil {
+		logger.Warn("Failed to read token decimals", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("contract", transfer.ContractAddress),
+		)
+		return "", err
+	}
+
+	amount := transfer.NetAmount
+	if amount == nil || strings.TrimSpace(amount.Amount) == "" {
+		logger.Warn("Transfer missing net amount", zap.String("transfer_ref", transfer.TransferRef))
+		return "", executorInvalid("transfer missing net amount")
+	}
+	amountInt, err := toBaseUnits(amount.Amount, decimals)
+	if err != nil {
+		logger.Warn("Failed to convert amount to base units", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("amount", amount.Amount),
+		)
+		return "", err
+	}
+
+	input, err := erc20ABI.Pack("transfer", destinationAddr, amountInt)
+	if err != nil {
+		logger.Warn("Failed to encode transfer call", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+		)
+		return "", executorInternal("failed to encode transfer call", err)
+	}
+
+	callMsg := ethereum.CallMsg{
+		From:     sourceAddress,
+		To:       &tokenAddress,
+		GasPrice: gasPrice,
+		Data:     input,
+	}
+	gasLimit, err := client.EstimateGas(ctx, callMsg)
+	if err != nil {
+		logger.Warn("Failed to estimate gas", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+		)
+		return "", executorInternal("failed to estimate gas", err)
+	}
+
+	tx := types.NewTransaction(nonce, tokenAddress, big.NewInt(0), gasLimit, gasPrice, input)
+
+	signedTx, err := deps.KeyManager.SignTransaction(ctx, source.KeyReference, tx, chainID)
+	if err != nil {
+		logger.Warn("Failed to sign transaction", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("wallet_ref", source.WalletRef),
+		)
+		return "", err
+	}
+
+	if err := client.SendTransaction(ctx, signedTx); err != nil {
+		logger.Warn("Failed to send transaction", zap.Error(err),
+			zap.String("transfer_ref", transfer.TransferRef),
+		)
+		return "", executorInternal("failed to send transaction", err)
+	}
+
+	txHash := signedTx.Hash().Hex()
+	logger.Info("Transaction submitted",
+		zap.String("transfer_ref", transfer.TransferRef),
+		zap.String("tx_hash", txHash),
+		zap.String("network", network.Name),
+	)
+
+	return txHash, nil
+}
+
+// AwaitConfirmation waits for the transaction receipt.
+func AwaitConfirmation(ctx context.Context, deps driver.Deps, network shared.Network, txHash string) (*types.Receipt, error) {
+	logger := deps.Logger
+	registry := deps.Registry
+
+	if strings.TrimSpace(txHash) == "" {
+		logger.Warn("Missing transaction hash for confirmation", zap.String("network", network.Name))
+		return nil, executorInvalid("tx hash is required")
+	}
+	rpcURL := strings.TrimSpace(network.RPCURL)
+	if rpcURL == "" {
+		logger.Warn("Network rpc url missing while awaiting confirmation", zap.String("tx_hash", txHash))
+		return nil, executorInvalid("network rpc url is not configured")
+	}
+	if registry == nil {
+		return nil, executorInternal("rpc clients not initialised", nil)
+	}
+
+	client, err := registry.Client(network.Name)
+	if err != nil {
+		return nil, err
+	}
+
+	hash := common.HexToHash(txHash)
+	ticker := time.NewTicker(3 * time.Second)
+	defer ticker.Stop()
+
+	for {
+		receipt, err := client.TransactionReceipt(ctx, hash)
+		if err != nil {
+			if errors.Is(err, ethereum.NotFound) {
+				select {
+				case <-ticker.C:
+					logger.Debug("Transaction not yet mined",
+						zap.String("tx_hash", txHash),
+						zap.String("network", network.Name),
+					)
+					continue
+				case <-ctx.Done():
+					logger.Warn("Context cancelled while awaiting confirmation",
+						zap.String("tx_hash", txHash),
+						zap.String("network", network.Name),
+					)
+					return nil, ctx.Err()
+				}
+			}
+			logger.Warn("Failed to fetch transaction receipt",
+				zap.String("tx_hash", txHash),
+				zap.String("network", network.Name),
+				zap.Error(err),
+			)
+			return nil, executorInternal("failed to fetch transaction receipt", err)
+		}
+		logger.Info("Transaction confirmed",
+			zap.String("tx_hash", txHash),
+			zap.String("network", network.Name),
+			zap.Uint64("block_number", receipt.BlockNumber.Uint64()),
+			zap.Uint64("status", receipt.Status),
+		)
+		return receipt, nil
+	}
+}
+
+func readDecimals(ctx context.Context, client *rpc.Client, token string) (uint8, error) {
+	call := map[string]string{
+		"to":   strings.ToLower(common.HexToAddress(token).Hex()),
+		"data": "0x313ce567",
+	}
+	var hexResp string
+	if err := client.CallContext(ctx, &hexResp, "eth_call", call, "latest"); err != nil {
+		return 0, merrors.Internal("decimals call failed: " + err.Error())
+	}
+	val, err := shared.DecodeHexUint8(hexResp)
+	if err != nil {
+		return 0, merrors.Internal("decimals decode failed: " + err.Error())
+	}
+	return val, nil
+}
+
+func readBalanceOf(ctx context.Context, client *rpc.Client, token string, wallet string) (*big.Int, error) {
+	tokenAddr := common.HexToAddress(token)
+	walletAddr := common.HexToAddress(wallet)
+	addr := strings.TrimPrefix(walletAddr.Hex(), "0x")
+	if len(addr) < 64 {
+		addr = strings.Repeat("0", 64-len(addr)) + addr
+	}
+	call := map[string]string{
+		"to":   strings.ToLower(tokenAddr.Hex()),
+		"data": "0x70a08231" + addr,
+	}
+	var hexResp string
+	if err := client.CallContext(ctx, &hexResp, "eth_call", call, "latest"); err != nil {
+		return nil, merrors.Internal("balanceOf call failed: " + err.Error())
+	}
+	bigVal, err := shared.DecodeHexBig(hexResp)
+	if err != nil {
+		return nil, merrors.Internal("balanceOf decode failed: " + err.Error())
+	}
+	return bigVal, nil
+}
+
+func erc20Decimals(ctx context.Context, client *rpc.Client, token common.Address) (uint8, error) {
+	call := map[string]string{
+		"to":   strings.ToLower(token.Hex()),
+		"data": "0x313ce567",
+	}
+	var hexResp string
+	if err := client.CallContext(ctx, &hexResp, "eth_call", call, "latest"); err != nil {
+		return 0, executorInternal("decimals call failed", err)
+	}
+	val, err := shared.DecodeHexUint8(hexResp)
+	if err != nil {
+		return 0, executorInternal("decimals decode failed", err)
+	}
+	return val, nil
+}
+
+func toBaseUnits(amount string, decimals uint8) (*big.Int, error) {
+	value, err := decimal.NewFromString(strings.TrimSpace(amount))
+	if err != nil {
+		return nil, merrors.InvalidArgument("invalid amount " + amount + ": " + err.Error())
+	}
+	if value.IsNegative() {
+		return nil, merrors.InvalidArgument("amount must be positive")
+	}
+	multiplier := decimal.NewFromInt(1).Shift(int32(decimals))
+	scaled := value.Mul(multiplier)
+	if !scaled.Equal(scaled.Truncate(0)) {
+		return nil, merrors.InvalidArgument("amount " + amount + " exceeds token precision")
+	}
+	return scaled.BigInt(), nil
+}
+
+func executorInvalid(msg string) error {
+	return merrors.InvalidArgument("executor: " + msg)
+}
+
+func executorInternal(msg string, err error) error {
+	if err != nil {
+		msg = msg + ": " + err.Error()
+	}
+	return merrors.Internal("executor: " + msg)
+}

api/gateway/chain/internal/service/gateway/driver/tron/address.go

@@ -0,0 +1,193 @@
+package tron
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"math/big"
+	"strings"
+
+	"github.com/tech/sendico/pkg/merrors"
+)
+
+const tronHexPrefix = "0x"
+
+var base58Alphabet = []byte("123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz")
+
+func normalizeAddress(address string) (string, error) {
+	trimmed := strings.TrimSpace(address)
+	if trimmed == "" {
+		return "", merrors.InvalidArgument("address is required")
+	}
+	if strings.HasPrefix(trimmed, tronHexPrefix) || isHexString(trimmed) {
+		return hexToBase58(trimmed)
+	}
+	decoded, err := base58Decode(trimmed)
+	if err != nil {
+		return "", err
+	}
+	if err := validateChecksum(decoded); err != nil {
+		return "", err
+	}
+	return base58Encode(decoded), nil
+}
+
+func rpcAddress(address string) (string, error) {
+	trimmed := strings.TrimSpace(address)
+	if trimmed == "" {
+		return "", merrors.InvalidArgument("address is required")
+	}
+	if strings.HasPrefix(trimmed, tronHexPrefix) || isHexString(trimmed) {
+		return normalizeHexRPC(trimmed)
+	}
+	return base58ToHex(trimmed)
+}
+
+func hexToBase58(address string) (string, error) {
+	bytesAddr, err := parseHexAddress(address)
+	if err != nil {
+		return "", err
+	}
+	payload := append(bytesAddr, checksum(bytesAddr)...)
+	return base58Encode(payload), nil
+}
+
+func base58ToHex(address string) (string, error) {
+	decoded, err := base58Decode(address)
+	if err != nil {
+		return "", err
+	}
+	if err := validateChecksum(decoded); err != nil {
+		return "", err
+	}
+	return tronHexPrefix + hex.EncodeToString(decoded[1:21]), nil
+}
+
+func parseHexAddress(address string) ([]byte, error) {
+	trimmed := strings.TrimPrefix(strings.TrimSpace(address), tronHexPrefix)
+	if trimmed == "" {
+		return nil, merrors.InvalidArgument("address is required")
+	}
+	if len(trimmed)%2 == 1 {
+		trimmed = "0" + trimmed
+	}
+	decoded, err := hex.DecodeString(trimmed)
+	if err != nil {
+		return nil, merrors.InvalidArgument("invalid hex address")
+	}
+	switch len(decoded) {
+	case 20:
+		prefixed := make([]byte, 21)
+		prefixed[0] = 0x41
+		copy(prefixed[1:], decoded)
+		return prefixed, nil
+	case 21:
+		if decoded[0] != 0x41 {
+			return nil, merrors.InvalidArgument("invalid tron address prefix")
+		}
+		return decoded, nil
+	default:
+		return nil, merrors.InvalidArgument(fmt.Sprintf("invalid tron address length %d", len(decoded)))
+	}
+}
+
+func normalizeHexRPC(address string) (string, error) {
+	decoded, err := parseHexAddress(address)
+	if err != nil {
+		return "", err
+	}
+	return tronHexPrefix + hex.EncodeToString(decoded[1:21]), nil
+}
+
+func validateChecksum(decoded []byte) error {
+	if len(decoded) != 25 {
+		return merrors.InvalidArgument("invalid tron address length")
+	}
+	payload := decoded[:21]
+	expected := checksum(payload)
+	if !bytes.Equal(expected, decoded[21:]) {
+		return merrors.InvalidArgument("invalid tron address checksum")
+	}
+	if payload[0] != 0x41 {
+		return merrors.InvalidArgument("invalid tron address prefix")
+	}
+	return nil
+}
+
+func checksum(payload []byte) []byte {
+	first := sha256.Sum256(payload)
+	second := sha256.Sum256(first[:])
+	return second[:4]
+}
+
+func base58Encode(input []byte) string {
+	if len(input) == 0 {
+		return ""
+	}
+	x := new(big.Int).SetBytes(input)
+	base := big.NewInt(58)
+	zero := big.NewInt(0)
+	mod := new(big.Int)
+
+	encoded := make([]byte, 0, len(input))
+	for x.Cmp(zero) > 0 {
+		x.DivMod(x, base, mod)
+		encoded = append(encoded, base58Alphabet[mod.Int64()])
+	}
+	for _, b := range input {
+		if b != 0 {
+			break
+		}
+		encoded = append(encoded, base58Alphabet[0])
+	}
+	reverse(encoded)
+	return string(encoded)
+}
+
+func base58Decode(input string) ([]byte, error) {
+	result := big.NewInt(0)
+	base := big.NewInt(58)
+
+	for i := 0; i < len(input); i++ {
+		idx := bytes.IndexByte(base58Alphabet, input[i])
+		if idx < 0 {
+			return nil, merrors.InvalidArgument("invalid base58 address")
+		}
+		result.Mul(result, base)
+		result.Add(result, big.NewInt(int64(idx)))
+	}
+
+	decoded := result.Bytes()
+	zeroCount := 0
+	for zeroCount < len(input) && input[zeroCount] == base58Alphabet[0] {
+		zeroCount++
+	}
+	if zeroCount > 0 {
+		decoded = append(make([]byte, zeroCount), decoded...)
+	}
+	return decoded, nil
+}
+
+func reverse(data []byte) {
+	for i, j := 0, len(data)-1; i < j; i, j = i+1, j-1 {
+		data[i], data[j] = data[j], data[i]
+	}
+}
+
+func isHexString(value string) bool {
+	trimmed := strings.TrimPrefix(strings.TrimSpace(value), tronHexPrefix)
+	if trimmed == "" {
+		return false
+	}
+	for _, r := range trimmed {
+		switch {
+		case r >= '0' && r <= '9':
+		case r >= 'a' && r <= 'f':
+		case r >= 'A' && r <= 'F':
+		default:
+			return false
+		}
+	}
+	return true
+}

api/gateway/chain/internal/service/gateway/driver/tron/driver.go

@@ -0,0 +1,203 @@
+package tron
+
+import (
+	"context"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver/evm"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/gateway/chain/storage/model"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	"go.uber.org/zap"
+)
+
+// Driver implements Tron-specific behavior, including address conversion.
+type Driver struct {
+	logger mlogger.Logger
+}
+
+func New(logger mlogger.Logger) *Driver {
+	return &Driver{logger: logger.Named("tron")}
+}
+
+func (d *Driver) Name() string {
+	return "tron"
+}
+
+func (d *Driver) FormatAddress(address string) (string, error) {
+	d.logger.Debug("format address", zap.String("address", address))
+	normalized, err := normalizeAddress(address)
+	if err != nil {
+		d.logger.Warn("format address failed", zap.String("address", address), zap.Error(err))
+	}
+	return normalized, err
+}
+
+func (d *Driver) NormalizeAddress(address string) (string, error) {
+	d.logger.Debug("normalize address", zap.String("address", address))
+	normalized, err := normalizeAddress(address)
+	if err != nil {
+		d.logger.Warn("normalize address failed", zap.String("address", address), zap.Error(err))
+	}
+	return normalized, err
+}
+
+func (d *Driver) Balance(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet) (*moneyv1.Money, error) {
+	if wallet == nil {
+		return nil, merrors.InvalidArgument("wallet is required")
+	}
+	d.logger.Debug("balance request",
+		zap.String("wallet_ref", wallet.WalletRef),
+		zap.String("network", network.Name),
+	)
+	rpcAddr, err := rpcAddress(wallet.DepositAddress)
+	if err != nil {
+		d.logger.Warn("balance address conversion failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("address", wallet.DepositAddress),
+			zap.Error(err),
+		)
+		return nil, err
+	}
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	result, err := evm.Balance(ctx, driverDeps, network, wallet, rpcAddr)
+	if err != nil {
+		d.logger.Warn("balance failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if result != nil {
+		d.logger.Debug("balance result",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.String("amount", result.Amount),
+			zap.String("currency", result.Currency),
+		)
+	}
+	return result, err
+}
+
+func (d *Driver) EstimateFee(ctx context.Context, deps driver.Deps, network shared.Network, wallet *model.ManagedWallet, destination string, amount *moneyv1.Money) (*moneyv1.Money, error) {
+	if wallet == nil {
+		return nil, merrors.InvalidArgument("wallet is required")
+	}
+	d.logger.Debug("estimate fee request",
+		zap.String("wallet_ref", wallet.WalletRef),
+		zap.String("network", network.Name),
+		zap.String("destination", destination),
+	)
+	rpcFrom, err := rpcAddress(wallet.DepositAddress)
+	if err != nil {
+		d.logger.Warn("estimate fee address conversion failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("address", wallet.DepositAddress),
+			zap.Error(err),
+		)
+		return nil, err
+	}
+	rpcTo, err := rpcAddress(destination)
+	if err != nil {
+		d.logger.Warn("estimate fee destination conversion failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("destination", destination),
+			zap.Error(err),
+		)
+		return nil, err
+	}
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	result, err := evm.EstimateFee(ctx, driverDeps, network, wallet, rpcFrom, rpcTo, amount)
+	if err != nil {
+		d.logger.Warn("estimate fee failed",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if result != nil {
+		d.logger.Debug("estimate fee result",
+			zap.String("wallet_ref", wallet.WalletRef),
+			zap.String("network", network.Name),
+			zap.String("amount", result.Amount),
+			zap.String("currency", result.Currency),
+		)
+	}
+	return result, err
+}
+
+func (d *Driver) SubmitTransfer(ctx context.Context, deps driver.Deps, network shared.Network, transfer *model.Transfer, source *model.ManagedWallet, destination string) (string, error) {
+	if source == nil {
+		return "", merrors.InvalidArgument("source wallet is required")
+	}
+	d.logger.Debug("submit transfer request",
+		zap.String("transfer_ref", transfer.TransferRef),
+		zap.String("network", network.Name),
+		zap.String("destination", destination),
+	)
+	rpcFrom, err := rpcAddress(source.DepositAddress)
+	if err != nil {
+		d.logger.Warn("submit transfer address conversion failed",
+			zap.String("wallet_ref", source.WalletRef),
+			zap.String("address", source.DepositAddress),
+			zap.Error(err),
+		)
+		return "", err
+	}
+	rpcTo, err := rpcAddress(destination)
+	if err != nil {
+		d.logger.Warn("submit transfer destination conversion failed",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("destination", destination),
+			zap.Error(err),
+		)
+		return "", err
+	}
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	txHash, err := evm.SubmitTransfer(ctx, driverDeps, network, transfer, source, rpcFrom, rpcTo)
+	if err != nil {
+		d.logger.Warn("submit transfer failed",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else {
+		d.logger.Debug("submit transfer result",
+			zap.String("transfer_ref", transfer.TransferRef),
+			zap.String("network", network.Name),
+			zap.String("tx_hash", txHash),
+		)
+	}
+	return txHash, err
+}
+
+func (d *Driver) AwaitConfirmation(ctx context.Context, deps driver.Deps, network shared.Network, txHash string) (*types.Receipt, error) {
+	d.logger.Debug("await confirmation",
+		zap.String("tx_hash", txHash),
+		zap.String("network", network.Name),
+	)
+	driverDeps := deps
+	driverDeps.Logger = d.logger
+	receipt, err := evm.AwaitConfirmation(ctx, driverDeps, network, txHash)
+	if err != nil {
+		d.logger.Warn("await confirmation failed",
+			zap.String("tx_hash", txHash),
+			zap.String("network", network.Name),
+			zap.Error(err),
+		)
+	} else if receipt != nil {
+		d.logger.Debug("await confirmation result",
+			zap.String("tx_hash", txHash),
+			zap.String("network", network.Name),
+			zap.Uint64("block_number", receipt.BlockNumber.Uint64()),
+			zap.Uint64("status", receipt.Status),
+		)
+	}
+	return receipt, err
+}
+
+var _ driver.Driver = (*Driver)(nil)

api/gateway/chain/internal/service/gateway/drivers/registry.go

@@ -0,0 +1,74 @@
+package drivers
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver/arbitrum"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver/ethereum"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver/tron"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"go.uber.org/zap"
+)
+
+// Registry maps configured network keys to chain drivers.
+type Registry struct {
+	byNetwork map[string]driver.Driver
+}
+
+// NewRegistry selects drivers for the configured networks.
+func NewRegistry(logger mlogger.Logger, networks []shared.Network) (*Registry, error) {
+	if logger == nil {
+		return nil, merrors.InvalidArgument("driver registry: logger is required")
+	}
+	result := &Registry{byNetwork: map[string]driver.Driver{}}
+	for _, network := range networks {
+		name := strings.ToLower(strings.TrimSpace(network.Name))
+		if name == "" {
+			continue
+		}
+		chainDriver, err := resolveDriver(logger, name)
+		if err != nil {
+			logger.Error("unsupported chain driver", zap.String("network", name), zap.Error(err))
+			return nil, err
+		}
+		result.byNetwork[name] = chainDriver
+	}
+	if len(result.byNetwork) == 0 {
+		return nil, merrors.InvalidArgument("driver registry: no supported networks configured")
+	}
+	logger.Info("chain drivers configured", zap.Int("count", len(result.byNetwork)))
+	return result, nil
+}
+
+// Driver resolves a driver for the provided network key.
+func (r *Registry) Driver(network string) (driver.Driver, error) {
+	if r == nil || len(r.byNetwork) == 0 {
+		return nil, merrors.Internal("driver registry is not configured")
+	}
+	key := strings.ToLower(strings.TrimSpace(network))
+	if key == "" {
+		return nil, merrors.InvalidArgument("network is required")
+	}
+	chainDriver, ok := r.byNetwork[key]
+	if !ok {
+		return nil, merrors.InvalidArgument(fmt.Sprintf("unsupported chain network %s", key))
+	}
+	return chainDriver, nil
+}
+
+func resolveDriver(logger mlogger.Logger, network string) (driver.Driver, error) {
+	switch {
+	case strings.HasPrefix(network, "tron"):
+		return tron.New(logger), nil
+	case strings.HasPrefix(network, "arbitrum"):
+		return arbitrum.New(logger), nil
+	case strings.HasPrefix(network, "ethereum"):
+		return ethereum.New(logger), nil
+	default:
+		return nil, merrors.InvalidArgument("unsupported chain network " + network)
+	}
+}

api/gateway/chain/internal/service/gateway/executor.go

@@ -5,15 +5,15 @@ import (
 	"errors"
 	"math/big"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/shopspring/decimal"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/rpcclient"
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	"go.uber.org/zap"
 
@@ -30,11 +30,11 @@ type TransferExecutor interface {
 }
 
 // NewOnChainExecutor constructs a TransferExecutor that talks to an EVM-compatible chain.
-func NewOnChainExecutor(logger mlogger.Logger, keyManager keymanager.Manager) TransferExecutor {
+func NewOnChainExecutor(logger mlogger.Logger, keyManager keymanager.Manager, clients *rpcclient.Clients) TransferExecutor {
 	return &onChainExecutor{
 		logger:     logger.Named("executor"),
 		keyManager: keyManager,
-		clients:    map[string]*ethclient.Client{},
+		clients:    clients,
 	}
 }
 
@@ -42,34 +42,33 @@ type onChainExecutor struct {
 	logger     mlogger.Logger
 	keyManager keymanager.Manager
 
-	mu      sync.Mutex
+	clients *rpcclient.Clients
-	clients map[string]*ethclient.Client
 }
 
 func (o *onChainExecutor) SubmitTransfer(ctx context.Context, transfer *model.Transfer, source *model.ManagedWallet, destinationAddress string, network shared.Network) (string, error) {
 	if o.keyManager == nil {
-		o.logger.Error("key manager not configured")
+		o.logger.Warn("key manager not configured")
 		return "", executorInternal("key manager is not configured", nil)
 	}
 	rpcURL := strings.TrimSpace(network.RPCURL)
 	if rpcURL == "" {
-		o.logger.Error("network rpc url missing", zap.String("network", network.Name))
+		o.logger.Warn("network rpc url missing", zap.String("network", network.Name))
 		return "", executorInvalid("network rpc url is not configured")
 	}
 	if source == nil || transfer == nil {
-		o.logger.Error("transfer context missing")
+		o.logger.Warn("transfer context missing")
 		return "", executorInvalid("transfer context missing")
 	}
 	if strings.TrimSpace(source.KeyReference) == "" {
-		o.logger.Error("source wallet missing key reference", zap.String("wallet_ref", source.WalletRef))
+		o.logger.Warn("source wallet missing key reference", zap.String("wallet_ref", source.WalletRef))
 		return "", executorInvalid("source wallet missing key reference")
 	}
 	if strings.TrimSpace(source.DepositAddress) == "" {
-		o.logger.Error("source wallet missing deposit address", zap.String("wallet_ref", source.WalletRef))
+		o.logger.Warn("source wallet missing deposit address", zap.String("wallet_ref", source.WalletRef))
 		return "", executorInvalid("source wallet missing deposit address")
 	}
 	if !common.IsHexAddress(destinationAddress) {
-		o.logger.Error("invalid destination address", zap.String("transfer_ref", transfer.TransferRef), zap.String("address", destinationAddress))
+		o.logger.Warn("invalid destination address", zap.String("transfer_ref", transfer.TransferRef), zap.String("address", destinationAddress))
 		return "", executorInvalid("invalid destination address " + destinationAddress)
 	}
 
@@ -80,11 +79,15 @@ func (o *onChainExecutor) SubmitTransfer(ctx context.Context, transfer *model.Tr
 		zap.String("destination", strings.ToLower(destinationAddress)),
 	)
 
-	client, err := o.getClient(ctx, rpcURL)
+	client, err := o.clients.Client(network.Name)
+	if err != nil {
+		o.logger.Warn("failed to initialise rpc client", zap.Error(err), zap.String("network", network.Name))
+		return "", err
+	}
+	rpcClient, err := o.clients.RPCClient(network.Name)
 	if err != nil {
 		o.logger.Warn("failed to initialise rpc client",
 			zap.String("network", network.Name),
-			zap.String("rpc_url", rpcURL),
 			zap.Error(err),
 		)
 		return "", err
@@ -98,10 +101,9 @@ func (o *onChainExecutor) SubmitTransfer(ctx context.Context, transfer *model.Tr
 
 	nonce, err := client.PendingNonceAt(ctx, sourceAddress)
 	if err != nil {
-		o.logger.Warn("failed to fetch nonce",
+		o.logger.Warn("failed to fetch nonce", zap.Error(err),
 			zap.String("transfer_ref", transfer.TransferRef),
 			zap.String("wallet_ref", source.WalletRef),
-			zap.Error(err),
 		)
 		return "", executorInternal("failed to fetch nonce", err)
 	}
@@ -135,12 +137,11 @@ func (o *onChainExecutor) SubmitTransfer(ctx context.Context, transfer *model.Tr
 	}
 	tokenAddress := common.HexToAddress(transfer.ContractAddress)
 
-	decimals, err := erc20Decimals(ctx, client, tokenAddress)
+	decimals, err := erc20Decimals(ctx, rpcClient, tokenAddress)
 	if err != nil {
-		o.logger.Warn("failed to read token decimals",
+		o.logger.Warn("failed to read token decimals", zap.Error(err),
 			zap.String("transfer_ref", transfer.TransferRef),
 			zap.String("contract", transfer.ContractAddress),
-			zap.Error(err),
 		)
 		return "", err
 	}
@@ -152,10 +153,9 @@ func (o *onChainExecutor) SubmitTransfer(ctx context.Context, transfer *model.Tr
 	}
 	amountInt, err := toBaseUnits(amount.Amount, decimals)
 	if err != nil {
-		o.logger.Warn("failed to convert amount to base units",
+		o.logger.Warn("failed to convert amount to base units", zap.Error(err),
 			zap.String("transfer_ref", transfer.TransferRef),
 			zap.String("amount", amount.Amount),
-			zap.Error(err),
 		)
 		return "", err
 	}
@@ -188,18 +188,16 @@ func (o *onChainExecutor) SubmitTransfer(ctx context.Context, transfer *model.Tr
 
 	signedTx, err := o.keyManager.SignTransaction(ctx, source.KeyReference, tx, chainID)
 	if err != nil {
-		o.logger.Warn("failed to sign transaction",
+		o.logger.Warn("failed to sign transaction", zap.Error(err),
 			zap.String("transfer_ref", transfer.TransferRef),
 			zap.String("wallet_ref", source.WalletRef),
-			zap.Error(err),
 		)
 		return "", err
 	}
 
 	if err := client.SendTransaction(ctx, signedTx); err != nil {
-		o.logger.Warn("failed to send transaction",
+		o.logger.Warn("failed to send transaction", zap.Error(err),
 			zap.String("transfer_ref", transfer.TransferRef),
-			zap.Error(err),
 		)
 		return "", executorInternal("failed to send transaction", err)
 	}
@@ -214,30 +212,6 @@ func (o *onChainExecutor) SubmitTransfer(ctx context.Context, transfer *model.Tr
 	return txHash, nil
 }
 
-func (o *onChainExecutor) getClient(ctx context.Context, rpcURL string) (*ethclient.Client, error) {
-	o.mu.Lock()
-	client, ok := o.clients[rpcURL]
-	o.mu.Unlock()
-	if ok {
-		return client, nil
-	}
-
-	c, err := ethclient.DialContext(ctx, rpcURL)
-	if err != nil {
-		return nil, executorInternal("failed to connect to rpc "+rpcURL, err)
-	}
-
-	o.mu.Lock()
-	defer o.mu.Unlock()
-	if existing, ok := o.clients[rpcURL]; ok {
-		// Another routine initialised it in the meantime; prefer the existing client and close the new one.
-		c.Close()
-		return existing, nil
-	}
-	o.clients[rpcURL] = c
-	return c, nil
-}
-
 func (o *onChainExecutor) AwaitConfirmation(ctx context.Context, network shared.Network, txHash string) (*types.Receipt, error) {
 	if strings.TrimSpace(txHash) == "" {
 		o.logger.Warn("missing transaction hash for confirmation", zap.String("network", network.Name))
@@ -249,7 +223,7 @@ func (o *onChainExecutor) AwaitConfirmation(ctx context.Context, network shared.
 		return nil, executorInvalid("network rpc url is not configured")
 	}
 
-	client, err := o.getClient(ctx, rpcURL)
+	client, err := o.clients.Client(network.Name)
 	if err != nil {
 		return nil, err
 	}
@@ -331,31 +305,20 @@ const erc20ABIJSON = `
 	}
 ]`
 
-func erc20Decimals(ctx context.Context, client *ethclient.Client, token common.Address) (uint8, error) {
+func erc20Decimals(ctx context.Context, client *rpc.Client, token common.Address) (uint8, error) {
-	callData, err := erc20ABI.Pack("decimals")
+	call := map[string]string{
-	if err != nil {
+		"to":   strings.ToLower(token.Hex()),
-		return 0, executorInternal("failed to encode decimals call", err)
+		"data": "0x313ce567",
 	}
-	msg := ethereum.CallMsg{
+	var hexResp string
-		To:   &token,
+	if err := client.CallContext(ctx, &hexResp, "eth_call", call, "latest"); err != nil {
-		Data: callData,
-	}
-	output, err := client.CallContract(ctx, msg, nil)
-	if err != nil {
 		return 0, executorInternal("decimals call failed", err)
 	}
-	values, err := erc20ABI.Unpack("decimals", output)
+	val, err := shared.DecodeHexUint8(hexResp)
 	if err != nil {
-		return 0, executorInternal("failed to unpack decimals", err)
+		return 0, executorInternal("decimals decode failed", err)
 	}
-	if len(values) == 0 {
+	return val, nil
-		return 0, executorInternal("decimals call returned no data", nil)
-	}
-	decimals, ok := values[0].(uint8)
-	if !ok {
-		return 0, executorInternal("decimals call returned unexpected type", nil)
-	}
-	return decimals, nil
 }
 
 func toBaseUnits(amount string, decimals uint8) (*big.Int, error) {

api/gateway/chain/internal/service/gateway/options.go

@@ -4,6 +4,8 @@ import (
 	"strings"
 
 	"github.com/tech/sendico/gateway/chain/internal/keymanager"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/drivers"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/rpcclient"
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	clockpkg "github.com/tech/sendico/pkg/clock"
 )
@@ -18,10 +20,10 @@ func WithKeyManager(manager keymanager.Manager) Option {
 	}
 }
 
-// WithTransferExecutor configures the executor responsible for on-chain submissions.
+// WithRPCClients configures pre-initialised RPC clients.
-func WithTransferExecutor(executor TransferExecutor) Option {
+func WithRPCClients(clients *rpcclient.Clients) Option {
 	return func(s *Service) {
-		s.executor = executor
+		s.rpcClients = clients
 	}
 }
 
@@ -59,6 +61,13 @@ func WithServiceWallet(wallet shared.ServiceWallet) Option {
 	}
 }
 
+// WithDriverRegistry configures the chain driver registry.
+func WithDriverRegistry(registry *drivers.Registry) Option {
+	return func(s *Service) {
+		s.drivers = registry
+	}
+}
+
 // WithClock overrides the service clock.
 func WithClock(clk clockpkg.Clock) Option {
 	return func(s *Service) {

api/gateway/chain/internal/service/gateway/rpcclient/clients.go

@@ -0,0 +1,199 @@
+package rpcclient
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"go.uber.org/zap"
+)
+
+// Clients holds pre-initialised RPC clients keyed by network name.
+type Clients struct {
+	logger  mlogger.Logger
+	clients map[string]clientEntry
+}
+
+type clientEntry struct {
+	eth *ethclient.Client
+	rpc *rpc.Client
+}
+
+// Prepare dials all configured networks up front and returns a ready-to-use client set.
+func Prepare(ctx context.Context, logger mlogger.Logger, networks []shared.Network) (*Clients, error) {
+	if logger == nil {
+		return nil, merrors.Internal("rpc clients: logger is required")
+	}
+	clientLogger := logger.Named("rpc_client")
+	result := &Clients{
+		logger:  clientLogger,
+		clients: make(map[string]clientEntry),
+	}
+
+	for _, network := range networks {
+		name := strings.ToLower(strings.TrimSpace(network.Name))
+		rpcURL := strings.TrimSpace(network.RPCURL)
+		if name == "" {
+			clientLogger.Warn("Skipping network with empty name during rpc client preparation")
+			continue
+		}
+		if rpcURL == "" {
+			result.Close()
+			err := merrors.InvalidArgument(fmt.Sprintf("rpc url not configured for network %s", name))
+			clientLogger.Warn("rpc url missing", zap.String("network", name))
+			return nil, err
+		}
+
+		fields := []zap.Field{
+			zap.String("network", name),
+		}
+		clientLogger.Info("initialising rpc client", fields...)
+
+		dialCtx, cancel := context.WithTimeout(ctx, 15*time.Second)
+		httpClient := &http.Client{
+			Transport: &loggingRoundTripper{
+				logger:   clientLogger,
+				network:  name,
+				endpoint: rpcURL,
+				base:     http.DefaultTransport,
+			},
+		}
+		rpcCli, err := rpc.DialOptions(dialCtx, rpcURL, rpc.WithHTTPClient(httpClient))
+		cancel()
+		if err != nil {
+			result.Close()
+			clientLogger.Warn("failed to dial rpc endpoint", append(fields, zap.Error(err))...)
+			return nil, merrors.Internal(fmt.Sprintf("rpc dial failed for %s: %s", name, err.Error()))
+		}
+		client := ethclient.NewClient(rpcCli)
+		result.clients[name] = clientEntry{
+			eth: client,
+			rpc: rpcCli,
+		}
+		clientLogger.Info("rpc client ready", fields...)
+	}
+
+	if len(result.clients) == 0 {
+		clientLogger.Warn("No rpc clients were initialised")
+		return nil, merrors.InvalidArgument("no rpc clients initialised")
+	} else {
+		clientLogger.Info("RPC clients initialised", zap.Int("count", len(result.clients)))
+	}
+
+	return result, nil
+}
+
+// Client returns a prepared client for the given network name.
+func (c *Clients) Client(network string) (*ethclient.Client, error) {
+	if c == nil {
+		return nil, merrors.Internal("rpc clients not initialised")
+	}
+	name := strings.ToLower(strings.TrimSpace(network))
+	entry, ok := c.clients[name]
+	if !ok || entry.eth == nil {
+		return nil, merrors.InvalidArgument(fmt.Sprintf("rpc client not configured for network %s", name))
+	}
+	return entry.eth, nil
+}
+
+// RPCClient returns the raw RPC client for low-level calls.
+func (c *Clients) RPCClient(network string) (*rpc.Client, error) {
+	if c == nil {
+		return nil, merrors.Internal("rpc clients not initialised")
+	}
+	name := strings.ToLower(strings.TrimSpace(network))
+	entry, ok := c.clients[name]
+	if !ok || entry.rpc == nil {
+		return nil, merrors.InvalidArgument(fmt.Sprintf("rpc client not configured for network %s", name))
+	}
+	return entry.rpc, nil
+}
+
+// Close tears down all RPC clients, logging each close.
+func (c *Clients) Close() {
+	if c == nil {
+		return
+	}
+	for name, entry := range c.clients {
+		if entry.rpc != nil {
+			entry.rpc.Close()
+		} else if entry.eth != nil {
+			entry.eth.Close()
+		}
+		if c.logger != nil {
+			c.logger.Info("rpc client closed", zap.String("network", name))
+		}
+	}
+}
+
+type loggingRoundTripper struct {
+	logger   mlogger.Logger
+	network  string
+	endpoint string
+	base     http.RoundTripper
+}
+
+func (l *loggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if l.base == nil {
+		l.base = http.DefaultTransport
+	}
+
+	var reqBody []byte
+	if req.Body != nil {
+		raw, _ := io.ReadAll(req.Body)
+		reqBody = raw
+		req.Body = io.NopCloser(strings.NewReader(string(raw)))
+	}
+
+	fields := []zap.Field{
+		zap.String("network", l.network),
+		zap.String("rpc_endpoint", l.endpoint),
+	}
+	if len(reqBody) > 0 {
+		fields = append(fields, zap.String("rpc_request", truncate(string(reqBody), 2048)))
+	}
+	l.logger.Debug("rpc request", fields...)
+
+	resp, err := l.base.RoundTrip(req)
+	if err != nil {
+		l.logger.Warn("rpc http request failed", append(fields, zap.Error(err))...)
+		return nil, err
+	}
+
+	bodyBytes, _ := io.ReadAll(resp.Body)
+	resp.Body.Close()
+	resp.Body = io.NopCloser(strings.NewReader(string(bodyBytes)))
+
+	respFields := append(fields,
+		zap.Int("status_code", resp.StatusCode),
+	)
+	if len(bodyBytes) > 0 {
+		respFields = append(respFields, zap.String("rpc_response", truncate(string(bodyBytes), 2048)))
+	}
+	if resp.StatusCode >= 400 {
+		l.logger.Warn("RPC response error", respFields...)
+	} else {
+		// Log response content so downstream parse failures can be inspected without debug logs.
+		l.logger.Warn("RPC response", respFields...)
+	}
+
+	return resp, nil
+}
+
+func truncate(s string, max int) string {
+	if len(s) <= max {
+		return s
+	}
+	if max <= 3 {
+		return s[:max]
+	}
+	return s[:max-3] + "..."
+}

api/gateway/chain/internal/service/gateway/rpcclient/registry.go

@@ -0,0 +1,54 @@
+package rpcclient
+
+import (
+	"strings"
+
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/pkg/merrors"
+)
+
+// Registry binds static network metadata with prepared RPC clients.
+type Registry struct {
+	networks map[string]shared.Network
+	clients  *Clients
+}
+
+// NewRegistry constructs a registry keyed by lower-cased network name.
+func NewRegistry(networks map[string]shared.Network, clients *Clients) *Registry {
+	return &Registry{
+		networks: networks,
+		clients:  clients,
+	}
+}
+
+// Network fetches network metadata by key (case-insensitive).
+func (r *Registry) Network(key string) (shared.Network, bool) {
+	if r == nil || len(r.networks) == 0 {
+		return shared.Network{}, false
+	}
+	n, ok := r.networks[strings.ToLower(strings.TrimSpace(key))]
+	return n, ok
+}
+
+// Client returns the prepared RPC client for the given network name.
+func (r *Registry) Client(key string) (*ethclient.Client, error) {
+	if r == nil || r.clients == nil {
+		return nil, merrors.Internal("rpc clients not initialised")
+	}
+	return r.clients.Client(strings.ToLower(strings.TrimSpace(key)))
+}
+
+// RPCClient returns the raw RPC client for low-level calls.
+func (r *Registry) RPCClient(key string) (*rpc.Client, error) {
+	if r == nil || r.clients == nil {
+		return nil, merrors.Internal("rpc clients not initialised")
+	}
+	return r.clients.RPCClient(strings.ToLower(strings.TrimSpace(key)))
+}
+
+// Networks exposes the registry map for iteration when needed.
+func (r *Registry) Networks() map[string]shared.Network {
+	return r.networks
+}

api/gateway/chain/internal/service/gateway/service.go

@@ -7,6 +7,8 @@ import (
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/commands"
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/commands/transfer"
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/commands/wallet"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/drivers"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/rpcclient"
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	"github.com/tech/sendico/gateway/chain/storage"
 	"github.com/tech/sendico/pkg/api/routers"
@@ -41,7 +43,9 @@ type Service struct {
 	networks        map[string]shared.Network
 	serviceWallet   shared.ServiceWallet
 	keyManager      keymanager.Manager
-	executor      TransferExecutor
+	rpcClients      *rpcclient.Clients
+	networkRegistry *rpcclient.Registry
+	drivers         *drivers.Registry
 	commands        commands.Registry
 
 	chainv1.UnimplementedChainGatewayServiceServer
@@ -73,6 +77,7 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 		svc.networks = map[string]shared.Network{}
 	}
 	svc.settings = svc.settings.withDefaults()
+	svc.networkRegistry = rpcclient.NewRegistry(svc.networks, svc.rpcClients)
 
 	svc.commands = commands.NewRegistry(commands.RegistryDeps{
 		Wallet:   commandsWalletDeps(svc),
@@ -131,11 +136,13 @@ func (s *Service) ensureRepository(ctx context.Context) error {
 func commandsWalletDeps(s *Service) wallet.Deps {
 	return wallet.Deps{
 		Logger:           s.logger.Named("command"),
-		Networks:         s.networks,
+		Drivers:          s.drivers,
+		Networks:         s.networkRegistry,
 		KeyManager:       s.keyManager,
 		Storage:          s.storage,
 		Clock:            s.clock,
 		BalanceCacheTTL:  s.settings.walletBalanceCacheTTL(),
+		RPCTimeout:       s.settings.rpcTimeout(),
 		EnsureRepository: s.ensureRepository,
 	}
 }
@@ -143,9 +150,11 @@ func commandsWalletDeps(s *Service) wallet.Deps {
 func commandsTransferDeps(s *Service) transfer.Deps {
 	return transfer.Deps{
 		Logger:           s.logger.Named("transfer_cmd"),
-		Networks:         s.networks,
+		Drivers:          s.drivers,
+		Networks:         s.networkRegistry,
 		Storage:          s.storage,
 		Clock:            s.clock,
+		RPCTimeout:       s.settings.rpcTimeout(),
 		EnsureRepository: s.ensureRepository,
 		LaunchExecution:  s.launchTransferExecution,
 	}

api/gateway/chain/internal/service/gateway/service_test.go

@@ -18,6 +18,7 @@ import (
 	"google.golang.org/grpc/status"
 
 	"github.com/tech/sendico/gateway/chain/internal/keymanager"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/drivers"
 	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	"github.com/tech/sendico/gateway/chain/storage"
 	"github.com/tech/sendico/gateway/chain/storage/model"
@@ -526,18 +527,22 @@ func sanitizeLimit(requested int32, def, max int64) int64 {
 	return int64(requested)
 }
 
-func newTestService(_ *testing.T) (*Service, *inMemoryRepository) {
+func newTestService(t *testing.T) (*Service, *inMemoryRepository) {
 	repo := newInMemoryRepository()
 	logger := zap.NewNop()
-	svc := NewService(logger, repo, nil,
+	networks := []shared.Network{{
-		WithKeyManager(&fakeKeyManager{}),
-		WithNetworks([]shared.Network{{
 		Name: "ethereum_mainnet",
 		TokenConfigs: []shared.TokenContract{
 			{Symbol: "USDC", ContractAddress: "0xusdc"},
 		},
-		}}),
+	}}
+	driverRegistry, err := drivers.NewRegistry(logger.Named("drivers"), networks)
+	require.NoError(t, err)
+	svc := NewService(logger, repo, nil,
+		WithKeyManager(&fakeKeyManager{}),
+		WithNetworks(networks),
 		WithServiceWallet(shared.ServiceWallet{Network: "ethereum_mainnet", Address: "0xservice"}),
+		WithDriverRegistry(driverRegistry),
 	)
 	return svc, repo
 }

api/gateway/chain/internal/service/gateway/settings.go

@@ -3,15 +3,18 @@ package gateway
 import "time"
 
 const defaultWalletBalanceCacheTTL = 120 * time.Second
+const defaultRPCRequestTimeout = 15 * time.Second
 
 // CacheSettings holds tunable gateway behaviour.
 type CacheSettings struct {
 	WalletBalanceCacheTTLSeconds int `yaml:"wallet_balance_ttl_seconds"`
+	RPCRequestTimeoutSeconds     int `yaml:"rpc_request_timeout_seconds"`
 }
 
 func defaultSettings() CacheSettings {
 	return CacheSettings{
 		WalletBalanceCacheTTLSeconds: int(defaultWalletBalanceCacheTTL.Seconds()),
+		RPCRequestTimeoutSeconds:     int(defaultRPCRequestTimeout.Seconds()),
 	}
 }
 
@@ -19,6 +22,9 @@ func (s CacheSettings) withDefaults() CacheSettings {
 	if s.WalletBalanceCacheTTLSeconds <= 0 {
 		s.WalletBalanceCacheTTLSeconds = int(defaultWalletBalanceCacheTTL.Seconds())
 	}
+	if s.RPCRequestTimeoutSeconds <= 0 {
+		s.RPCRequestTimeoutSeconds = int(defaultRPCRequestTimeout.Seconds())
+	}
 	return s
 }
 
@@ -28,3 +34,10 @@ func (s CacheSettings) walletBalanceCacheTTL() time.Duration {
 	}
 	return time.Duration(s.WalletBalanceCacheTTLSeconds) * time.Second
 }
+
+func (s CacheSettings) rpcTimeout() time.Duration {
+	if s.RPCRequestTimeoutSeconds <= 0 {
+		return defaultRPCRequestTimeout
+	}
+	return time.Duration(s.RPCRequestTimeoutSeconds) * time.Second
+}

api/gateway/chain/internal/service/gateway/shared/hex.go

@@ -0,0 +1,49 @@
+package shared
+
+import (
+	"errors"
+	"math/big"
+	"strings"
+)
+
+var (
+	errHexEmpty      = errors.New("hex value is empty")
+	errHexInvalid    = errors.New("invalid hex number")
+	errHexOutOfRange = errors.New("hex number out of range")
+)
+
+// DecodeHexBig parses a hex string that may include leading zero digits.
+func DecodeHexBig(input string) (*big.Int, error) {
+	trimmed := strings.TrimSpace(input)
+	if trimmed == "" {
+		return nil, errHexEmpty
+	}
+	noPrefix := strings.TrimPrefix(trimmed, "0x")
+	if noPrefix == "" {
+		return nil, errHexEmpty
+	}
+	value := strings.TrimLeft(noPrefix, "0")
+	if value == "" {
+		return big.NewInt(0), nil
+	}
+	val := new(big.Int)
+	if _, ok := val.SetString(value, 16); !ok {
+		return nil, errHexInvalid
+	}
+	return val, nil
+}
+
+// DecodeHexUint8 parses a hex string into uint8, allowing leading zeros.
+func DecodeHexUint8(input string) (uint8, error) {
+	val, err := DecodeHexBig(input)
+	if err != nil {
+		return 0, err
+	}
+	if val == nil {
+		return 0, errHexInvalid
+	}
+	if val.BitLen() > 8 {
+		return 0, errHexOutOfRange
+	}
+	return uint8(val.Uint64()), nil
+}

api/gateway/chain/internal/service/gateway/shared/hex_test.go

@@ -0,0 +1,16 @@
+package shared
+
+import "testing"
+
+func TestDecodeHexUint8_LeadingZeros(t *testing.T) {
+	t.Parallel()
+
+	const resp = "0x0000000000000000000000000000000000000000000000000000000000000006"
+	val, err := DecodeHexUint8(resp)
+	if err != nil {
+		t.Fatalf("DecodeHexUint8 error: %v", err)
+	}
+	if val != 6 {
+		t.Fatalf("DecodeHexUint8 value = %d, want 6", val)
+	}
+}

api/gateway/chain/internal/service/gateway/transfer_execution.go

@@ -7,15 +7,15 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/driver"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 	"github.com/tech/sendico/gateway/chain/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
 	"go.uber.org/zap"
-
-	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
 )
 
 func (s *Service) launchTransferExecution(transferRef, sourceWalletRef string, network shared.Network) {
-	if s.executor == nil {
+	if s.drivers == nil {
 		return
 	}
 
@@ -24,7 +24,7 @@ func (s *Service) launchTransferExecution(transferRef, sourceWalletRef string, n
 		defer cancel()
 
 		if err := s.executeTransfer(ctx, ref, walletRef, net); err != nil {
-			s.logger.Error("failed to execute transfer", zap.String("transfer_ref", ref), zap.Error(err))
+			s.logger.Warn("failed to execute transfer", zap.String("transfer_ref", ref), zap.Error(err))
 		}
 	}(transferRef, sourceWalletRef, network)
 }
@@ -44,13 +44,20 @@ func (s *Service) executeTransfer(ctx context.Context, transferRef, sourceWallet
 		s.logger.Warn("failed to update transfer status to signing", zap.String("transfer_ref", transferRef), zap.Error(err))
 	}
 
-	destinationAddress, err := s.destinationAddress(ctx, transfer.Destination)
+	driverDeps := s.driverDeps()
+	chainDriver, err := s.driverForNetwork(network.Name)
 	if err != nil {
 		_, _ = s.storage.Transfers().UpdateStatus(ctx, transferRef, model.TransferStatusFailed, err.Error(), "")
 		return err
 	}
 
-	txHash, err := s.executor.SubmitTransfer(ctx, transfer, sourceWallet, destinationAddress, network)
+	destinationAddress, err := s.destinationAddress(ctx, chainDriver, transfer.Destination)
+	if err != nil {
+		_, _ = s.storage.Transfers().UpdateStatus(ctx, transferRef, model.TransferStatusFailed, err.Error(), "")
+		return err
+	}
+
+	txHash, err := chainDriver.SubmitTransfer(ctx, driverDeps, network, transfer, sourceWallet, destinationAddress)
 	if err != nil {
 		_, _ = s.storage.Transfers().UpdateStatus(ctx, transferRef, model.TransferStatusFailed, err.Error(), "")
 		return err
@@ -62,7 +69,7 @@ func (s *Service) executeTransfer(ctx context.Context, transferRef, sourceWallet
 
 	receiptCtx, cancel := context.WithTimeout(ctx, 10*time.Minute)
 	defer cancel()
-	receipt, err := s.executor.AwaitConfirmation(receiptCtx, network, txHash)
+	receipt, err := chainDriver.AwaitConfirmation(receiptCtx, driverDeps, network, txHash)
 	if err != nil {
 		if !errors.Is(err, context.DeadlineExceeded) && !errors.Is(err, context.Canceled) {
 			s.logger.Warn("failed to await transfer confirmation", zap.String("transfer_ref", transferRef), zap.Error(err))
@@ -83,7 +90,7 @@ func (s *Service) executeTransfer(ctx context.Context, transferRef, sourceWallet
 	return nil
 }
 
-func (s *Service) destinationAddress(ctx context.Context, dest model.TransferDestination) (string, error) {
+func (s *Service) destinationAddress(ctx context.Context, chainDriver driver.Driver, dest model.TransferDestination) (string, error) {
 	if ref := strings.TrimSpace(dest.ManagedWalletRef); ref != "" {
 		wallet, err := s.storage.Wallets().Get(ctx, ref)
 		if err != nil {
@@ -92,10 +99,26 @@ func (s *Service) destinationAddress(ctx context.Context, dest model.TransferDes
 		if strings.TrimSpace(wallet.DepositAddress) == "" {
 			return "", merrors.Internal("destination wallet missing deposit address")
 		}
-		return wallet.DepositAddress, nil
+		return chainDriver.NormalizeAddress(wallet.DepositAddress)
 	}
 	if addr := strings.TrimSpace(dest.ExternalAddress); addr != "" {
-		return strings.ToLower(addr), nil
+		return chainDriver.NormalizeAddress(addr)
 	}
 	return "", merrors.InvalidArgument("transfer destination address not resolved")
 }
+
+func (s *Service) driverDeps() driver.Deps {
+	return driver.Deps{
+		Logger:     s.logger.Named("driver"),
+		Registry:   s.networkRegistry,
+		KeyManager: s.keyManager,
+		RPCTimeout: s.settings.rpcTimeout(),
+	}
+}
+
+func (s *Service) driverForNetwork(network string) (driver.Driver, error) {
+	if s.drivers == nil {
+		return nil, merrors.Internal("chain drivers not configured")
+	}
+	return s.drivers.Driver(network)
+}

api/gateway/chain/storage/model/wallet.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/tech/sendico/pkg/db/storable"
+	pkgmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
 )
@@ -20,6 +21,7 @@ const (
 // ManagedWallet represents a user-controlled on-chain wallet managed by the service.
 type ManagedWallet struct {
 	storable.Base        `bson:",inline" json:",inline"`
+	pkgmodel.Describable `bson:",inline" json:",inline"`
 
 	IdempotencyKey  string              `bson:"idempotencyKey" json:"idempotencyKey"`
 	WalletRef       string              `bson:"walletRef" json:"walletRef"`
@@ -77,10 +79,19 @@ func (m *ManagedWallet) Normalize() {
 	m.WalletRef = strings.TrimSpace(m.WalletRef)
 	m.OrganizationRef = strings.TrimSpace(m.OrganizationRef)
 	m.OwnerRef = strings.TrimSpace(m.OwnerRef)
+	m.Name = strings.TrimSpace(m.Name)
+	if m.Description != nil {
+		desc := strings.TrimSpace(*m.Description)
+		if desc == "" {
+			m.Description = nil
+		} else {
+			m.Description = &desc
+		}
+	}
 	m.Network = strings.TrimSpace(strings.ToLower(m.Network))
 	m.TokenSymbol = strings.TrimSpace(strings.ToUpper(m.TokenSymbol))
 	m.ContractAddress = strings.TrimSpace(strings.ToLower(m.ContractAddress))
-	m.DepositAddress = strings.TrimSpace(strings.ToLower(m.DepositAddress))
+	m.DepositAddress = normalizeWalletAddress(m.DepositAddress)
 	m.KeyReference = strings.TrimSpace(m.KeyReference)
 }
 
@@ -88,3 +99,31 @@ func (m *ManagedWallet) Normalize() {
 func (b *WalletBalance) Normalize() {
 	b.WalletRef = strings.TrimSpace(b.WalletRef)
 }
+
+func normalizeWalletAddress(address string) string {
+	trimmed := strings.TrimSpace(address)
+	if trimmed == "" {
+		return ""
+	}
+	if isHexAddress(trimmed) {
+		return strings.ToLower(trimmed)
+	}
+	return trimmed
+}
+
+func isHexAddress(value string) bool {
+	trimmed := strings.TrimPrefix(strings.TrimSpace(value), "0x")
+	if len(trimmed) != 40 && len(trimmed) != 42 {
+		return false
+	}
+	for _, r := range trimmed {
+		switch {
+		case r >= '0' && r <= '9':
+		case r >= 'a' && r <= 'f':
+		case r >= 'A' && r <= 'F':
+		default:
+			return false
+		}
+	}
+	return true
+}

api/gateway/mntx/client/client.go

@@ -0,0 +1,84 @@
+package client
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/tech/sendico/pkg/merrors"
+	mntxv1 "github.com/tech/sendico/pkg/proto/gateway/mntx/v1"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+// Client wraps the Monetix gateway gRPC API.
+type Client interface {
+	CreateCardPayout(ctx context.Context, req *mntxv1.CardPayoutRequest) (*mntxv1.CardPayoutResponse, error)
+	CreateCardTokenPayout(ctx context.Context, req *mntxv1.CardTokenPayoutRequest) (*mntxv1.CardTokenPayoutResponse, error)
+	GetCardPayoutStatus(ctx context.Context, req *mntxv1.GetCardPayoutStatusRequest) (*mntxv1.GetCardPayoutStatusResponse, error)
+	Close() error
+}
+
+type gatewayClient struct {
+	conn   *grpc.ClientConn
+	client mntxv1.MntxGatewayServiceClient
+	cfg    Config
+}
+
+// New dials the Monetix gateway.
+func New(ctx context.Context, cfg Config, opts ...grpc.DialOption) (Client, error) {
+	cfg.setDefaults()
+	if strings.TrimSpace(cfg.Address) == "" {
+		return nil, merrors.InvalidArgument("mntx: address is required")
+	}
+	dialCtx, cancel := context.WithTimeout(ctx, cfg.DialTimeout)
+	defer cancel()
+
+	dialOpts := make([]grpc.DialOption, 0, len(opts)+1)
+	dialOpts = append(dialOpts, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	dialOpts = append(dialOpts, opts...)
+
+	conn, err := grpc.DialContext(dialCtx, cfg.Address, dialOpts...)
+	if err != nil {
+		return nil, merrors.Internal("mntx: dial failed: " + err.Error())
+	}
+
+	return &gatewayClient{
+		conn:   conn,
+		client: mntxv1.NewMntxGatewayServiceClient(conn),
+		cfg:    cfg,
+	}, nil
+}
+
+func (g *gatewayClient) Close() error {
+	if g.conn != nil {
+		return g.conn.Close()
+	}
+	return nil
+}
+
+func (g *gatewayClient) callContext(ctx context.Context) (context.Context, context.CancelFunc) {
+	timeout := g.cfg.CallTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	return context.WithTimeout(ctx, timeout)
+}
+
+func (g *gatewayClient) CreateCardPayout(ctx context.Context, req *mntxv1.CardPayoutRequest) (*mntxv1.CardPayoutResponse, error) {
+	ctx, cancel := g.callContext(ctx)
+	defer cancel()
+	return g.client.CreateCardPayout(ctx, req)
+}
+
+func (g *gatewayClient) CreateCardTokenPayout(ctx context.Context, req *mntxv1.CardTokenPayoutRequest) (*mntxv1.CardTokenPayoutResponse, error) {
+	ctx, cancel := g.callContext(ctx)
+	defer cancel()
+	return g.client.CreateCardTokenPayout(ctx, req)
+}
+
+func (g *gatewayClient) GetCardPayoutStatus(ctx context.Context, req *mntxv1.GetCardPayoutStatusRequest) (*mntxv1.GetCardPayoutStatusResponse, error) {
+	ctx, cancel := g.callContext(ctx)
+	defer cancel()
+	return g.client.GetCardPayoutStatus(ctx, req)
+}

api/gateway/mntx/client/config.go

@@ -0,0 +1,19 @@
+package client
+
+import "time"
+
+// Config holds Monetix gateway client settings.
+type Config struct {
+	Address     string
+	DialTimeout time.Duration
+	CallTimeout time.Duration
+}
+
+func (c *Config) setDefaults() {
+	if c.DialTimeout <= 0 {
+		c.DialTimeout = 5 * time.Second
+	}
+	if c.CallTimeout <= 0 {
+		c.CallTimeout = 10 * time.Second
+	}
+}

api/gateway/mntx/client/fake.go

@@ -0,0 +1,37 @@
+package client
+
+import (
+	"context"
+
+	mntxv1 "github.com/tech/sendico/pkg/proto/gateway/mntx/v1"
+)
+
+// Fake implements Client for tests.
+type Fake struct {
+	CreateCardPayoutFn      func(ctx context.Context, req *mntxv1.CardPayoutRequest) (*mntxv1.CardPayoutResponse, error)
+	CreateCardTokenPayoutFn func(ctx context.Context, req *mntxv1.CardTokenPayoutRequest) (*mntxv1.CardTokenPayoutResponse, error)
+	GetCardPayoutStatusFn   func(ctx context.Context, req *mntxv1.GetCardPayoutStatusRequest) (*mntxv1.GetCardPayoutStatusResponse, error)
+}
+
+func (f *Fake) CreateCardPayout(ctx context.Context, req *mntxv1.CardPayoutRequest) (*mntxv1.CardPayoutResponse, error) {
+	if f.CreateCardPayoutFn != nil {
+		return f.CreateCardPayoutFn(ctx, req)
+	}
+	return &mntxv1.CardPayoutResponse{}, nil
+}
+
+func (f *Fake) CreateCardTokenPayout(ctx context.Context, req *mntxv1.CardTokenPayoutRequest) (*mntxv1.CardTokenPayoutResponse, error) {
+	if f.CreateCardTokenPayoutFn != nil {
+		return f.CreateCardTokenPayoutFn(ctx, req)
+	}
+	return &mntxv1.CardTokenPayoutResponse{}, nil
+}
+
+func (f *Fake) GetCardPayoutStatus(ctx context.Context, req *mntxv1.GetCardPayoutStatusRequest) (*mntxv1.GetCardPayoutStatusResponse, error) {
+	if f.GetCardPayoutStatusFn != nil {
+		return f.GetCardPayoutStatusFn(ctx, req)
+	}
+	return &mntxv1.GetCardPayoutStatusResponse{}, nil
+}
+
+func (f *Fake) Close() error { return nil }

api/gateway/mntx/go.mod

@@ -11,8 +11,8 @@ require (
 	github.com/shopspring/decimal v1.4.0
 	github.com/tech/sendico/pkg v0.1.0
 	go.uber.org/zap v1.27.1
-	google.golang.org/grpc v1.77.0
+	google.golang.org/grpc v1.78.0
-	google.golang.org/protobuf v1.36.10
+	google.golang.org/protobuf v1.36.11
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -30,7 +30,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
@@ -50,5 +50,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
 )

api/gateway/mntx/go.sum

@@ -95,8 +95,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -214,12 +214,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/ledger/go.mod

@@ -11,8 +11,8 @@ require (
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver v1.17.6
 	go.uber.org/zap v1.27.1
-	google.golang.org/grpc v1.77.0
+	google.golang.org/grpc v1.78.0
-	google.golang.org/protobuf v1.36.10
+	google.golang.org/protobuf v1.36.11
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -33,7 +33,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
@@ -51,5 +51,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
 )

api/ledger/go.sum

@@ -95,8 +95,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -214,12 +214,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/ledger/storage/model/types.go

@@ -62,12 +62,6 @@ const (
 	OutboxStatusFailed  OutboxStatus = "failed"
 )
 
-// Money represents an exact decimal amount with its currency.
-type Money struct {
-	Currency string `bson:"currency" json:"currency"`
-	Amount   string `bson:"amount" json:"amount"` // stored as string for exact decimal representation
-}
-
 // LedgerMeta carries organization-scoped metadata for ledger entities.
 type LedgerMeta struct {
 	model.OrganizationBoundBase `bson:",inline" json:",inline"`

api/notification/go.mod

@@ -33,7 +33,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/prometheus/client_golang v1.23.2 // indirect
@@ -52,7 +52,7 @@ require (
 	golang.org/x/net v0.48.0 // indirect
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
-	google.golang.org/grpc v1.77.0 // indirect
+	google.golang.org/grpc v1.78.0 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 )

api/notification/go.sum

@@ -99,8 +99,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -227,12 +227,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/payments/orchestrator/client/client.go

@@ -17,6 +17,8 @@ import (
 // Client exposes typed helpers around the payment orchestrator gRPC API.
 type Client interface {
 	QuotePayment(ctx context.Context, req *orchestratorv1.QuotePaymentRequest) (*orchestratorv1.QuotePaymentResponse, error)
+	QuotePayments(ctx context.Context, req *orchestratorv1.QuotePaymentsRequest) (*orchestratorv1.QuotePaymentsResponse, error)
+	InitiatePayments(ctx context.Context, req *orchestratorv1.InitiatePaymentsRequest) (*orchestratorv1.InitiatePaymentsResponse, error)
 	InitiatePayment(ctx context.Context, req *orchestratorv1.InitiatePaymentRequest) (*orchestratorv1.InitiatePaymentResponse, error)
 	CancelPayment(ctx context.Context, req *orchestratorv1.CancelPaymentRequest) (*orchestratorv1.CancelPaymentResponse, error)
 	GetPayment(ctx context.Context, req *orchestratorv1.GetPaymentRequest) (*orchestratorv1.GetPaymentResponse, error)
@@ -29,6 +31,8 @@ type Client interface {
 
 type grpcOrchestratorClient interface {
 	QuotePayment(ctx context.Context, in *orchestratorv1.QuotePaymentRequest, opts ...grpc.CallOption) (*orchestratorv1.QuotePaymentResponse, error)
+	QuotePayments(ctx context.Context, in *orchestratorv1.QuotePaymentsRequest, opts ...grpc.CallOption) (*orchestratorv1.QuotePaymentsResponse, error)
+	InitiatePayments(ctx context.Context, in *orchestratorv1.InitiatePaymentsRequest, opts ...grpc.CallOption) (*orchestratorv1.InitiatePaymentsResponse, error)
 	InitiatePayment(ctx context.Context, in *orchestratorv1.InitiatePaymentRequest, opts ...grpc.CallOption) (*orchestratorv1.InitiatePaymentResponse, error)
 	CancelPayment(ctx context.Context, in *orchestratorv1.CancelPaymentRequest, opts ...grpc.CallOption) (*orchestratorv1.CancelPaymentResponse, error)
 	GetPayment(ctx context.Context, in *orchestratorv1.GetPaymentRequest, opts ...grpc.CallOption) (*orchestratorv1.GetPaymentResponse, error)
@@ -97,6 +101,18 @@ func (c *orchestratorClient) QuotePayment(ctx context.Context, req *orchestrator
 	return c.client.QuotePayment(ctx, req)
 }
 
+func (c *orchestratorClient) QuotePayments(ctx context.Context, req *orchestratorv1.QuotePaymentsRequest) (*orchestratorv1.QuotePaymentsResponse, error) {
+	ctx, cancel := c.callContext(ctx)
+	defer cancel()
+	return c.client.QuotePayments(ctx, req)
+}
+
+func (c *orchestratorClient) InitiatePayments(ctx context.Context, req *orchestratorv1.InitiatePaymentsRequest) (*orchestratorv1.InitiatePaymentsResponse, error) {
+	ctx, cancel := c.callContext(ctx)
+	defer cancel()
+	return c.client.InitiatePayments(ctx, req)
+}
+
 func (c *orchestratorClient) InitiatePayment(ctx context.Context, req *orchestratorv1.InitiatePaymentRequest) (*orchestratorv1.InitiatePaymentResponse, error) {
 	ctx, cancel := c.callContext(ctx)
 	defer cancel()

api/payments/orchestrator/client/fake.go

@@ -9,6 +9,8 @@ import (
 // Fake implements Client for tests.
 type Fake struct {
 	QuotePaymentFn           func(ctx context.Context, req *orchestratorv1.QuotePaymentRequest) (*orchestratorv1.QuotePaymentResponse, error)
+	QuotePaymentsFn          func(ctx context.Context, req *orchestratorv1.QuotePaymentsRequest) (*orchestratorv1.QuotePaymentsResponse, error)
+	InitiatePaymentsFn       func(ctx context.Context, req *orchestratorv1.InitiatePaymentsRequest) (*orchestratorv1.InitiatePaymentsResponse, error)
 	InitiatePaymentFn        func(ctx context.Context, req *orchestratorv1.InitiatePaymentRequest) (*orchestratorv1.InitiatePaymentResponse, error)
 	CancelPaymentFn          func(ctx context.Context, req *orchestratorv1.CancelPaymentRequest) (*orchestratorv1.CancelPaymentResponse, error)
 	GetPaymentFn             func(ctx context.Context, req *orchestratorv1.GetPaymentRequest) (*orchestratorv1.GetPaymentResponse, error)
@@ -26,6 +28,20 @@ func (f *Fake) QuotePayment(ctx context.Context, req *orchestratorv1.QuotePaymen
 	return &orchestratorv1.QuotePaymentResponse{}, nil
 }
 
+func (f *Fake) QuotePayments(ctx context.Context, req *orchestratorv1.QuotePaymentsRequest) (*orchestratorv1.QuotePaymentsResponse, error) {
+	if f.QuotePaymentsFn != nil {
+		return f.QuotePaymentsFn(ctx, req)
+	}
+	return &orchestratorv1.QuotePaymentsResponse{}, nil
+}
+
+func (f *Fake) InitiatePayments(ctx context.Context, req *orchestratorv1.InitiatePaymentsRequest) (*orchestratorv1.InitiatePaymentsResponse, error) {
+	if f.InitiatePaymentsFn != nil {
+		return f.InitiatePaymentsFn(ctx, req)
+	}
+	return &orchestratorv1.InitiatePaymentsResponse{}, nil
+}
+
 func (f *Fake) InitiatePayment(ctx context.Context, req *orchestratorv1.InitiatePaymentRequest) (*orchestratorv1.InitiatePaymentResponse, error) {
 	if f.InitiatePaymentFn != nil {
 		return f.InitiatePaymentFn(ctx, req)

api/payments/orchestrator/config.yml

@@ -56,3 +56,11 @@ oracle:
   dial_timeout_seconds: 5
   call_timeout_seconds: 3
   insecure: true
+
+card_gateways:
+  monetix:
+    funding_address: "wallet_funding_monetix"
+    fee_address: "wallet_fee_monetix"
+
+fee_ledger_accounts:
+  monetix: "ledger:fees:monetix"

api/payments/orchestrator/go.mod

@@ -8,6 +8,8 @@ replace github.com/tech/sendico/billing/fees => ../../billing/fees
 
 replace github.com/tech/sendico/gateway/chain => ../../gateway/chain
 
+replace github.com/tech/sendico/gateway/mntx => ../../gateway/mntx
+
 replace github.com/tech/sendico/fx/oracle => ../../fx/oracle
 
 replace github.com/tech/sendico/ledger => ../../ledger
@@ -17,12 +19,13 @@ require (
 	github.com/shopspring/decimal v1.4.0
 	github.com/tech/sendico/fx/oracle v0.0.0-00010101000000-000000000000
 	github.com/tech/sendico/gateway/chain v0.0.0-00010101000000-000000000000
+	github.com/tech/sendico/gateway/mntx v0.0.0-00010101000000-000000000000
 	github.com/tech/sendico/ledger v0.0.0-00010101000000-000000000000
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver v1.17.6
 	go.uber.org/zap v1.27.1
-	google.golang.org/grpc v1.77.0
+	google.golang.org/grpc v1.78.0
-	google.golang.org/protobuf v1.36.10
+	google.golang.org/protobuf v1.36.11
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -42,7 +45,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.47.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
 	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
@@ -59,5 +62,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b // indirect
 )

api/payments/orchestrator/go.sum

@@ -95,8 +95,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.48.0 h1:pSFyXApG+yWU/TgbKCjmm5K4wrHu86231/w84qRVR+U=
-github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.48.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.12 h1:nssm7JKOG9/x4J8II47VWCL1Ds29avyiQDRn0ckMvDc=
 github.com/nats-io/nkeys v0.4.12/go.mod h1:MT59A1HYcjIcyQDJStTfaOY6vhy9XTUjOFo+SVsvpBg=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -119,8 +119,8 @@ github.com/prometheus/common v0.67.4 h1:yR3NqWO1/UyO1w2PhUvXlGQs/PtFmoveVO0KZ4+L
 github.com/prometheus/common v0.67.4/go.mod h1:gP0fq6YjjNCLssJCQp0yk4M8W6ikLURwkdd/YKtTbyI=
 github.com/prometheus/procfs v0.19.2 h1:zUMhqEW66Ex7OXIiDkll3tl9a1ZdilUOd/F6ZXw4Vws=
 github.com/prometheus/procfs v0.19.2/go.mod h1:M0aotyiemPhBCM0z5w87kL22CxfcH05ZpYlu+b4J7mw=
-github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
+github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
-github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/shirou/gopsutil v3.21.11+incompatible h1:+1+c1VGhc88SSonWP6foOcLhvnKlUeu/erjjvaPEYiI=
 github.com/shirou/gopsutil/v3 v3.24.5 h1:i0t8kL+kQTvpAYToeuiVk3TgDeKOFioZO3Ztz/iZ9pI=
 github.com/shirou/gopsutil/v3 v3.24.5/go.mod h1:bsoOS1aStSs9ErQ1WWfxllSeS1K5D+U30r2NfcubMVk=
@@ -215,12 +215,12 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 h1:gRkg/vSppuSQoDjxyiGfN4Upv/h/DQmIR10ZU8dh4Ww=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b h1:Mv8VFug0MP9e5vUxfBcE3vUkV6CImK3cMNMIDFjmzxU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20251222181119-0a764e51fe1b/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.77.0 h1:wVVY6/8cGA6vvffn+wWK5ToddbgdU3d8MNENr4evgXM=
+google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.77.0/go.mod h1:z0BY1iVj0q8E1uSQCjL9cppRj+gnZjzDnzV0dHhrNig=
+google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

api/payments/orchestrator/internal/server/internal/serverimp.go

@@ -7,8 +7,8 @@ import (
 	"strings"
 	"time"
 
-	chainclient "github.com/tech/sendico/gateway/chain/client"
 	oracleclient "github.com/tech/sendico/fx/oracle/client"
+	chainclient "github.com/tech/sendico/gateway/chain/client"
 	ledgerclient "github.com/tech/sendico/ledger/client"
 	"github.com/tech/sendico/payments/orchestrator/internal/service/orchestrator"
 	"github.com/tech/sendico/payments/orchestrator/storage"
@@ -45,6 +45,8 @@ type config struct {
 	Ledger          clientConfig                      `yaml:"ledger"`
 	Gateway         clientConfig                      `yaml:"gateway"`
 	Oracle          clientConfig                      `yaml:"oracle"`
+	CardGateways    map[string]cardGatewayRouteConfig `yaml:"card_gateways"`
+	FeeAccounts     map[string]string                 `yaml:"fee_ledger_accounts"`
 }
 
 type clientConfig struct {
@@ -54,6 +56,11 @@ type clientConfig struct {
 	InsecureTransport bool   `yaml:"insecure"`
 }
 
+type cardGatewayRouteConfig struct {
+	FundingAddress string `yaml:"funding_address"`
+	FeeAddress     string `yaml:"fee_address"`
+}
+
 func (c clientConfig) address() string {
 	return strings.TrimSpace(c.Address)
 }
@@ -150,6 +157,12 @@ func (i *Imp) Start() error {
 		if oracleClient != nil {
 			opts = append(opts, orchestrator.WithOracleClient(oracleClient))
 		}
+		if routes := buildCardGatewayRoutes(cfg.CardGateways); len(routes) > 0 {
+			opts = append(opts, orchestrator.WithCardGatewayRoutes(routes))
+		}
+		if feeAccounts := buildFeeLedgerAccounts(cfg.FeeAccounts); len(feeAccounts) > 0 {
+			opts = append(opts, orchestrator.WithFeeLedgerAccounts(feeAccounts))
+		}
 		return orchestrator.NewService(logger, repo, opts...), nil
 	}
 
@@ -296,3 +309,37 @@ func (i *Imp) loadConfig() (*config, error) {
 
 	return cfg, nil
 }
+
+func buildCardGatewayRoutes(src map[string]cardGatewayRouteConfig) map[string]orchestrator.CardGatewayRoute {
+	if len(src) == 0 {
+		return nil
+	}
+	result := make(map[string]orchestrator.CardGatewayRoute, len(src))
+	for key, route := range src {
+		trimmedKey := strings.TrimSpace(key)
+		if trimmedKey == "" {
+			continue
+		}
+		result[trimmedKey] = orchestrator.CardGatewayRoute{
+			FundingAddress: strings.TrimSpace(route.FundingAddress),
+			FeeAddress:     strings.TrimSpace(route.FeeAddress),
+		}
+	}
+	return result
+}
+
+func buildFeeLedgerAccounts(src map[string]string) map[string]string {
+	if len(src) == 0 {
+		return nil
+	}
+	result := make(map[string]string, len(src))
+	for key, account := range src {
+		k := strings.ToLower(strings.TrimSpace(key))
+		v := strings.TrimSpace(account)
+		if k == "" || v == "" {
+			continue
+		}
+		result[k] = v
+	}
+	return result
+}

api/payments/orchestrator/internal/service/orchestrator/card_payout.go

@@ -0,0 +1,252 @@
+package orchestrator
+
+import (
+	"context"
+	"strings"
+
+	"github.com/shopspring/decimal"
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	"github.com/tech/sendico/pkg/merrors"
+	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
+	mntxv1 "github.com/tech/sendico/pkg/proto/gateway/mntx/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+	"go.uber.org/zap"
+)
+
+const defaultCardGateway = "monetix"
+
+func (s *Service) cardRoute(gateway string) (CardGatewayRoute, error) {
+	if len(s.deps.cardRoutes) == 0 {
+		s.logger.Warn("card routing not configured", zap.String("gateway", gateway))
+		return CardGatewayRoute{}, merrors.InvalidArgument("card routing not configured")
+	}
+	key := strings.ToLower(strings.TrimSpace(gateway))
+	if key == "" {
+		key = defaultCardGateway
+	}
+	route, ok := s.deps.cardRoutes[key]
+	if !ok {
+		s.logger.Warn("card routing missing for gateway", zap.String("gateway", key))
+		return CardGatewayRoute{}, merrors.InvalidArgument("card routing missing for gateway " + key)
+	}
+	if strings.TrimSpace(route.FundingAddress) == "" {
+		s.logger.Warn("card routing missing funding address", zap.String("gateway", key))
+		return CardGatewayRoute{}, merrors.InvalidArgument("card funding address is required for gateway " + key)
+	}
+	return route, nil
+}
+
+func (s *Service) submitCardFundingTransfers(ctx context.Context, payment *model.Payment, quote *orchestratorv1.PaymentQuote) error {
+	if payment == nil {
+		return merrors.InvalidArgument("payment is required")
+	}
+	intent := payment.Intent
+	source := intent.Source.ManagedWallet
+	if source == nil || strings.TrimSpace(source.ManagedWalletRef) == "" {
+		return merrors.InvalidArgument("card funding: source managed wallet is required")
+	}
+	if !s.deps.gateway.available() {
+		s.logger.Warn("card funding aborted: chain gateway unavailable")
+		return merrors.InvalidArgument("card funding: chain gateway unavailable")
+	}
+
+	route, err := s.cardRoute(defaultCardGateway)
+	if err != nil {
+		return err
+	}
+
+	amount := cloneMoney(intent.Amount)
+	if amount == nil {
+		return merrors.InvalidArgument("card funding: amount is required")
+	}
+
+	exec := payment.Execution
+	if exec == nil {
+		exec = &model.ExecutionRefs{}
+	}
+
+	// Transfer payout amount to funding wallet.
+	fundReq := &chainv1.SubmitTransferRequest{
+		IdempotencyKey:  payment.IdempotencyKey + ":card:fund",
+		OrganizationRef: payment.OrganizationRef.Hex(),
+		SourceWalletRef: strings.TrimSpace(source.ManagedWalletRef),
+		Destination: &chainv1.TransferDestination{
+			Destination: &chainv1.TransferDestination_ExternalAddress{ExternalAddress: strings.TrimSpace(route.FundingAddress)},
+		},
+		Amount:          amount,
+		Metadata:        cloneMetadata(payment.Metadata),
+		ClientReference: payment.PaymentRef,
+	}
+	fundResp, err := s.deps.gateway.client.SubmitTransfer(ctx, fundReq)
+	if err != nil {
+		s.logger.Warn("card funding transfer failed", zap.Error(err), zap.String("payment_ref", payment.PaymentRef))
+		return err
+	}
+	if fundResp != nil && fundResp.GetTransfer() != nil {
+		exec.ChainTransferRef = strings.TrimSpace(fundResp.GetTransfer().GetTransferRef())
+	}
+	s.logger.Info("card funding transfer submitted", zap.String("payment_ref", payment.PaymentRef), zap.String("transfer_ref", exec.ChainTransferRef))
+
+	feeMoney := quote.GetExpectedFeeTotal()
+	if feeMoney != nil && strings.TrimSpace(feeMoney.GetAmount()) != "" {
+		if strings.TrimSpace(route.FeeAddress) == "" {
+			return merrors.InvalidArgument("card funding: fee address is required when fee exists")
+		}
+		feeDecimal, err := decimalFromMoney(feeMoney)
+		if err != nil {
+			return err
+		}
+		if feeDecimal.IsPositive() {
+			feeReq := &chainv1.SubmitTransferRequest{
+				IdempotencyKey:  payment.IdempotencyKey + ":card:fee",
+				OrganizationRef: payment.OrganizationRef.Hex(),
+				SourceWalletRef: strings.TrimSpace(source.ManagedWalletRef),
+				Destination: &chainv1.TransferDestination{
+					Destination: &chainv1.TransferDestination_ExternalAddress{ExternalAddress: strings.TrimSpace(route.FeeAddress)},
+				},
+				Amount:          feeMoney,
+				Metadata:        cloneMetadata(payment.Metadata),
+				ClientReference: payment.PaymentRef,
+			}
+			feeResp, feeErr := s.deps.gateway.client.SubmitTransfer(ctx, feeReq)
+			if feeErr != nil {
+				s.logger.Warn("card fee transfer failed", zap.Error(feeErr), zap.String("payment_ref", payment.PaymentRef))
+				return feeErr
+			}
+			if feeResp != nil && feeResp.GetTransfer() != nil {
+				exec.FeeTransferRef = strings.TrimSpace(feeResp.GetTransfer().GetTransferRef())
+			}
+			s.logger.Info("card fee transfer submitted", zap.String("payment_ref", payment.PaymentRef), zap.String("transfer_ref", exec.FeeTransferRef))
+		}
+	}
+
+	payment.Execution = exec
+	return nil
+}
+
+func (s *Service) submitCardPayout(ctx context.Context, payment *model.Payment) error {
+	if payment == nil {
+		return merrors.InvalidArgument("payment is required")
+	}
+	intent := payment.Intent
+	card := intent.Destination.Card
+	if card == nil {
+		return merrors.InvalidArgument("card payout: card endpoint is required")
+	}
+	amount := cloneMoney(intent.Amount)
+	if amount == nil || strings.TrimSpace(amount.GetAmount()) == "" || strings.TrimSpace(amount.GetCurrency()) == "" {
+		return merrors.InvalidArgument("card payout: amount is required")
+	}
+	amtDec, err := decimalFromMoney(amount)
+	if err != nil {
+		return err
+	}
+	minor := amtDec.Mul(decimal.NewFromInt(100)).IntPart()
+
+	payoutID := payment.PaymentRef
+	currency := strings.TrimSpace(amount.GetCurrency())
+	holder := strings.TrimSpace(card.Cardholder)
+	meta := cloneMetadata(payment.Metadata)
+
+	var (
+		state *mntxv1.CardPayoutState
+	)
+
+	if token := strings.TrimSpace(card.Token); token != "" {
+		req := &mntxv1.CardTokenPayoutRequest{
+			PayoutId:    payoutID,
+			AmountMinor: minor,
+			Currency:    currency,
+			CardToken:   token,
+			CardHolder:  holder,
+			MaskedPan:   strings.TrimSpace(card.MaskedPan),
+			Metadata:    meta,
+		}
+		resp, err := s.deps.mntx.client.CreateCardTokenPayout(ctx, req)
+		if err != nil {
+			s.logger.Warn("card token payout failed", zap.Error(err), zap.String("payment_ref", payment.PaymentRef))
+			return err
+		}
+		state = resp.GetPayout()
+	} else if pan := strings.TrimSpace(card.Pan); pan != "" {
+		req := &mntxv1.CardPayoutRequest{
+			PayoutId:     payoutID,
+			AmountMinor:  minor,
+			Currency:     currency,
+			CardPan:      pan,
+			CardExpYear:  card.ExpYear,
+			CardExpMonth: card.ExpMonth,
+			CardHolder:   holder,
+			Metadata:     meta,
+		}
+		resp, err := s.deps.mntx.client.CreateCardPayout(ctx, req)
+		if err != nil {
+			s.logger.Warn("card payout failed", zap.Error(err), zap.String("payment_ref", payment.PaymentRef))
+			return err
+		}
+		state = resp.GetPayout()
+	} else {
+		return merrors.InvalidArgument("card payout: either token or pan must be provided")
+	}
+
+	if state == nil {
+		return merrors.Internal("card payout: missing payout state")
+	}
+	recordCardPayoutState(payment, state)
+	if payment.Execution == nil {
+		payment.Execution = &model.ExecutionRefs{}
+	}
+	if payment.Execution.CardPayoutRef == "" {
+		payment.Execution.CardPayoutRef = strings.TrimSpace(state.GetPayoutId())
+	}
+	s.logger.Info("card payout submitted", zap.String("payment_ref", payment.PaymentRef), zap.String("payout_id", payment.Execution.CardPayoutRef))
+
+	return nil
+}
+
+func recordCardPayoutState(payment *model.Payment, state *mntxv1.CardPayoutState) {
+	if payment == nil || state == nil {
+		return
+	}
+	if payment.CardPayout == nil {
+		payment.CardPayout = &model.CardPayout{}
+	}
+	payment.CardPayout.PayoutRef = strings.TrimSpace(state.GetPayoutId())
+	payment.CardPayout.ProviderPaymentID = strings.TrimSpace(state.GetProviderPaymentId())
+	payment.CardPayout.Status = state.GetStatus().String()
+	payment.CardPayout.FailureReason = strings.TrimSpace(state.GetProviderMessage())
+	payment.CardPayout.ProviderCode = strings.TrimSpace(state.GetProviderCode())
+	if payment.CardPayout.CardCountry == "" && payment.Intent.Destination.Card != nil {
+		payment.CardPayout.CardCountry = strings.TrimSpace(payment.Intent.Destination.Card.Country)
+	}
+	if payment.CardPayout.MaskedPan == "" && payment.Intent.Destination.Card != nil {
+		payment.CardPayout.MaskedPan = strings.TrimSpace(payment.Intent.Destination.Card.MaskedPan)
+	}
+	payment.CardPayout.GatewayReference = strings.TrimSpace(state.GetPayoutId())
+}
+
+func applyCardPayoutUpdate(payment *model.Payment, payout *mntxv1.CardPayoutState) {
+	if payment == nil || payout == nil {
+		return
+	}
+	recordCardPayoutState(payment, payout)
+
+	if payment.Execution == nil {
+		payment.Execution = &model.ExecutionRefs{}
+	}
+	if payment.Execution.CardPayoutRef == "" {
+		payment.Execution.CardPayoutRef = strings.TrimSpace(payout.GetPayoutId())
+	}
+
+	payment.State = mapMntxStatusToState(payout.GetStatus())
+	switch payout.GetStatus() {
+	case mntxv1.PayoutStatus_PAYOUT_STATUS_PROCESSED:
+		payment.FailureCode = model.PaymentFailureCodeUnspecified
+		payment.FailureReason = ""
+	case mntxv1.PayoutStatus_PAYOUT_STATUS_FAILED:
+		payment.FailureCode = model.PaymentFailureCodePolicy
+		payment.FailureReason = strings.TrimSpace(payout.GetProviderMessage())
+	default:
+		// leave as-is for pending/unspecified
+	}
+}

api/payments/orchestrator/internal/service/orchestrator/command_factory.go

@@ -0,0 +1,97 @@
+package orchestrator
+
+import (
+	"context"
+	"time"
+
+	"github.com/tech/sendico/payments/orchestrator/storage"
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	"github.com/tech/sendico/pkg/mlogger"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+)
+
+type paymentEngine interface {
+	EnsureRepository(ctx context.Context) error
+	BuildPaymentQuote(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest) (*orchestratorv1.PaymentQuote, time.Time, error)
+	ResolvePaymentQuote(ctx context.Context, in quoteResolutionInput) (*orchestratorv1.PaymentQuote, error)
+	ExecutePayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment, quote *orchestratorv1.PaymentQuote) error
+	Repository() storage.Repository
+}
+
+type defaultPaymentEngine struct {
+	svc *Service
+}
+
+func (e defaultPaymentEngine) EnsureRepository(ctx context.Context) error {
+	return e.svc.ensureRepository(ctx)
+}
+
+func (e defaultPaymentEngine) BuildPaymentQuote(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest) (*orchestratorv1.PaymentQuote, time.Time, error) {
+	return e.svc.buildPaymentQuote(ctx, orgRef, req)
+}
+
+func (e defaultPaymentEngine) ResolvePaymentQuote(ctx context.Context, in quoteResolutionInput) (*orchestratorv1.PaymentQuote, error) {
+	return e.svc.resolvePaymentQuote(ctx, in)
+}
+
+func (e defaultPaymentEngine) ExecutePayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment, quote *orchestratorv1.PaymentQuote) error {
+	return e.svc.executePayment(ctx, store, payment, quote)
+}
+
+func (e defaultPaymentEngine) Repository() storage.Repository {
+	return e.svc.storage
+}
+
+type paymentCommandFactory struct {
+	engine paymentEngine
+	logger mlogger.Logger
+}
+
+func newPaymentCommandFactory(engine paymentEngine, logger mlogger.Logger) *paymentCommandFactory {
+	return &paymentCommandFactory{
+		engine: engine,
+		logger: logger.Named("commands"),
+	}
+}
+
+func (f *paymentCommandFactory) QuotePayment() *quotePaymentCommand {
+	return &quotePaymentCommand{
+		engine: f.engine,
+		logger: f.logger.Named("quote_payment"),
+	}
+}
+
+func (f *paymentCommandFactory) QuotePayments() *quotePaymentsCommand {
+	return &quotePaymentsCommand{
+		engine: f.engine,
+		logger: f.logger.Named("quote_payments"),
+	}
+}
+
+func (f *paymentCommandFactory) InitiatePayment() *initiatePaymentCommand {
+	return &initiatePaymentCommand{
+		engine: f.engine,
+		logger: f.logger.Named("initiate_payment"),
+	}
+}
+
+func (f *paymentCommandFactory) InitiatePayments() *initiatePaymentsCommand {
+	return &initiatePaymentsCommand{
+		engine: f.engine,
+		logger: f.logger.Named("initiate_payments"),
+	}
+}
+
+func (f *paymentCommandFactory) CancelPayment() *cancelPaymentCommand {
+	return &cancelPaymentCommand{
+		engine: f.engine,
+		logger: f.logger.Named("cancel_payment"),
+	}
+}
+
+func (f *paymentCommandFactory) InitiateConversion() *initiateConversionCommand {
+	return &initiateConversionCommand{
+		engine: f.engine,
+		logger: f.logger.Named("initiate_conversion"),
+	}
+}

api/payments/orchestrator/internal/service/orchestrator/convert.go

@@ -5,9 +5,7 @@ import (
 	"time"
 
 	"github.com/tech/sendico/payments/orchestrator/storage/model"
-	"github.com/tech/sendico/pkg/merrors"
 	fxv1 "github.com/tech/sendico/pkg/proto/common/fx/v1"
-	paginationv1 "github.com/tech/sendico/pkg/proto/common/pagination/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
 	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
 	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
@@ -26,6 +24,7 @@ func intentFromProto(src *orchestratorv1.PaymentIntent) model.PaymentIntent {
 		Amount:         cloneMoney(src.GetAmount()),
 		RequiresFX:     src.GetRequiresFx(),
 		FeePolicy:      src.GetFeePolicy(),
+		SettlementMode: src.GetSettlementMode(),
 		Attributes:     cloneMetadata(src.GetAttributes()),
 	}
 	if src.GetFx() != nil {
@@ -67,6 +66,19 @@ func endpointFromProto(src *orchestratorv1.PaymentEndpoint) model.PaymentEndpoin
 		}
 		return result
 	}
+	if card := src.GetCard(); card != nil {
+		result.Type = model.EndpointTypeCard
+		result.Card = &model.CardEndpoint{
+			Pan:        strings.TrimSpace(card.GetPan()),
+			Token:      strings.TrimSpace(card.GetToken()),
+			Cardholder: strings.TrimSpace(card.GetCardholderName()),
+			ExpMonth:   card.GetExpMonth(),
+			ExpYear:    card.GetExpYear(),
+			Country:    strings.TrimSpace(card.GetCountry()),
+			MaskedPan:  strings.TrimSpace(card.GetMaskedPan()),
+		}
+		return result
+	}
 	return result
 }
 
@@ -96,7 +108,6 @@ func quoteSnapshotToModel(src *orchestratorv1.PaymentQuote) *model.PaymentQuoteS
 		FeeRules:                 cloneFeeRules(src.GetFeeRules()),
 		FXQuote:                  cloneFXQuote(src.GetFxQuote()),
 		NetworkFee:               cloneNetworkEstimate(src.GetNetworkFee()),
-		FeeQuoteToken:            strings.TrimSpace(src.GetFeeQuoteToken()),
 		QuoteRef:                 strings.TrimSpace(src.GetQuoteRef()),
 	}
 }
@@ -116,6 +127,18 @@ func toProtoPayment(src *model.Payment) *orchestratorv1.Payment {
 		Execution:      protoExecutionFromModel(src.Execution),
 		Metadata:       cloneMetadata(src.Metadata),
 	}
+	if src.CardPayout != nil {
+		payment.CardPayout = &orchestratorv1.CardPayout{
+			PayoutRef:         src.CardPayout.PayoutRef,
+			ProviderPaymentId: src.CardPayout.ProviderPaymentID,
+			Status:            src.CardPayout.Status,
+			FailureReason:     src.CardPayout.FailureReason,
+			CardCountry:       src.CardPayout.CardCountry,
+			MaskedPan:         src.CardPayout.MaskedPan,
+			ProviderCode:      src.CardPayout.ProviderCode,
+			GatewayReference:  src.CardPayout.GatewayReference,
+		}
+	}
 	if src.CreatedAt.IsZero() {
 		payment.CreatedAt = timestamppb.New(time.Now().UTC())
 	} else {
@@ -135,6 +158,7 @@ func protoIntentFromModel(src model.PaymentIntent) *orchestratorv1.PaymentIntent
 		Amount:         cloneMoney(src.Amount),
 		RequiresFx:     src.RequiresFX,
 		FeePolicy:      src.FeePolicy,
+		SettlementMode: src.SettlementMode,
 		Attributes:     cloneMetadata(src.Attributes),
 	}
 	if src.FX != nil {
@@ -176,6 +200,23 @@ func protoEndpointFromModel(src model.PaymentEndpoint) *orchestratorv1.PaymentEn
 				},
 			}
 		}
+	case model.EndpointTypeCard:
+		if src.Card != nil {
+			card := &orchestratorv1.CardEndpoint{
+				CardholderName: src.Card.Cardholder,
+				ExpMonth:       src.Card.ExpMonth,
+				ExpYear:        src.Card.ExpYear,
+				Country:        src.Card.Country,
+				MaskedPan:      src.Card.MaskedPan,
+			}
+			if pan := strings.TrimSpace(src.Card.Pan); pan != "" {
+				card.Card = &orchestratorv1.CardEndpoint_Pan{Pan: pan}
+			}
+			if token := strings.TrimSpace(src.Card.Token); token != "" {
+				card.Card = &orchestratorv1.CardEndpoint_Token{Token: token}
+			}
+			endpoint.Endpoint = &orchestratorv1.PaymentEndpoint_Card{Card: card}
+		}
 	default:
 		// leave unspecified
 	}
@@ -205,6 +246,8 @@ func protoExecutionFromModel(src *model.ExecutionRefs) *orchestratorv1.Execution
 		CreditEntryRef:   src.CreditEntryRef,
 		FxEntryRef:       src.FXEntryRef,
 		ChainTransferRef: src.ChainTransferRef,
+		CardPayoutRef:    src.CardPayoutRef,
+		FeeTransferRef:   src.FeeTransferRef,
 	}
 }
 
@@ -220,7 +263,6 @@ func modelQuoteToProto(src *model.PaymentQuoteSnapshot) *orchestratorv1.PaymentQ
 		FeeRules:                 cloneFeeRules(src.FeeRules),
 		FxQuote:                  cloneFXQuote(src.FXQuote),
 		NetworkFee:               cloneNetworkEstimate(src.NetworkFee),
-		FeeQuoteToken:            src.FeeQuoteToken,
 		QuoteRef:                 strings.TrimSpace(src.QuoteRef),
 	}
 }
@@ -369,60 +411,3 @@ func cloneNetworkEstimate(resp *chainv1.EstimateTransferFeeResponse) *chainv1.Es
 	}
 	return nil
 }
-
-func protoFailureToModel(code orchestratorv1.PaymentFailureCode) model.PaymentFailureCode {
-	switch code {
-	case orchestratorv1.PaymentFailureCode_PAYMENT_FAILURE_CODE_BALANCE:
-		return model.PaymentFailureCodeBalance
-	case orchestratorv1.PaymentFailureCode_PAYMENT_FAILURE_CODE_LEDGER:
-		return model.PaymentFailureCodeLedger
-	case orchestratorv1.PaymentFailureCode_PAYMENT_FAILURE_CODE_FX:
-		return model.PaymentFailureCodeFX
-	case orchestratorv1.PaymentFailureCode_PAYMENT_FAILURE_CODE_CHAIN:
-		return model.PaymentFailureCodeChain
-	case orchestratorv1.PaymentFailureCode_PAYMENT_FAILURE_CODE_FEES:
-		return model.PaymentFailureCodeFees
-	case orchestratorv1.PaymentFailureCode_PAYMENT_FAILURE_CODE_POLICY:
-		return model.PaymentFailureCodePolicy
-	default:
-		return model.PaymentFailureCodeUnspecified
-	}
-}
-
-func applyProtoPaymentToModel(src *orchestratorv1.Payment, dst *model.Payment) error {
-	if src == nil || dst == nil {
-		return merrors.InvalidArgument("payment payload is required")
-	}
-	dst.PaymentRef = strings.TrimSpace(src.GetPaymentRef())
-	dst.IdempotencyKey = strings.TrimSpace(src.GetIdempotencyKey())
-	dst.Intent = intentFromProto(src.GetIntent())
-	dst.State = modelStateFromProto(src.GetState())
-	dst.FailureCode = protoFailureToModel(src.GetFailureCode())
-	dst.FailureReason = strings.TrimSpace(src.GetFailureReason())
-	dst.Metadata = cloneMetadata(src.GetMetadata())
-	dst.LastQuote = quoteSnapshotToModel(src.GetLastQuote())
-	dst.Execution = executionFromProto(src.GetExecution())
-	return nil
-}
-
-func executionFromProto(src *orchestratorv1.ExecutionRefs) *model.ExecutionRefs {
-	if src == nil {
-		return nil
-	}
-	return &model.ExecutionRefs{
-		DebitEntryRef:    strings.TrimSpace(src.GetDebitEntryRef()),
-		CreditEntryRef:   strings.TrimSpace(src.GetCreditEntryRef()),
-		FXEntryRef:       strings.TrimSpace(src.GetFxEntryRef()),
-		ChainTransferRef: strings.TrimSpace(src.GetChainTransferRef()),
-	}
-}
-
-func ensurePageRequest(req *orchestratorv1.ListPaymentsRequest) *paginationv1.CursorPageRequest {
-	if req == nil {
-		return &paginationv1.CursorPageRequest{}
-	}
-	if req.GetPage() == nil {
-		return &paginationv1.CursorPageRequest{}
-	}
-	return req.GetPage()
-}

api/payments/orchestrator/internal/service/orchestrator/convert_card_test.go

@@ -0,0 +1,69 @@
+package orchestrator
+
+import (
+	"testing"
+
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+)
+
+func TestEndpointFromProtoCard(t *testing.T) {
+	protoEndpoint := &orchestratorv1.PaymentEndpoint{
+		Endpoint: &orchestratorv1.PaymentEndpoint_Card{
+			Card: &orchestratorv1.CardEndpoint{
+				Card:           &orchestratorv1.CardEndpoint_Pan{Pan: " 411111 "},
+				CardholderName: " Jane Doe ",
+				ExpMonth:       12,
+				ExpYear:        2030,
+				Country:        " US ",
+				MaskedPan:      " ****1111 ",
+			},
+		},
+		Metadata: map[string]string{"k": "v"},
+	}
+
+	modelEndpoint := endpointFromProto(protoEndpoint)
+	if modelEndpoint.Type != model.EndpointTypeCard {
+		t.Fatalf("expected card type, got %s", modelEndpoint.Type)
+	}
+	if modelEndpoint.Card == nil {
+		t.Fatalf("card payload missing")
+	}
+	if modelEndpoint.Card.Pan != "411111" || modelEndpoint.Card.Cardholder != "Jane Doe" || modelEndpoint.Card.Country != "US" || modelEndpoint.Card.MaskedPan != "****1111" {
+		t.Fatalf("card payload not trimmed as expected: %#v", modelEndpoint.Card)
+	}
+	if modelEndpoint.Metadata["k"] != "v" {
+		t.Fatalf("metadata not preserved")
+	}
+}
+
+func TestProtoEndpointFromModelCard(t *testing.T) {
+	modelEndpoint := model.PaymentEndpoint{
+		Type: model.EndpointTypeCard,
+		Card: &model.CardEndpoint{
+			Token:      "tok_123",
+			Cardholder: "Jane",
+			ExpMonth:   1,
+			ExpYear:    2028,
+			Country:    "GB",
+			MaskedPan:  "****1234",
+		},
+		Metadata: map[string]string{"k": "v"},
+	}
+
+	protoEndpoint := protoEndpointFromModel(modelEndpoint)
+	card := protoEndpoint.GetCard()
+	if card == nil {
+		t.Fatalf("card payload missing in proto")
+	}
+	token, ok := card.Card.(*orchestratorv1.CardEndpoint_Token)
+	if !ok || token.Token != "tok_123" {
+		t.Fatalf("expected token payload, got %T %#v", card.Card, card.Card)
+	}
+	if card.GetCardholderName() != "Jane" || card.GetCountry() != "GB" || card.GetMaskedPan() != "****1234" {
+		t.Fatalf("card details mismatch: %#v", card)
+	}
+	if protoEndpoint.GetMetadata()["k"] != "v" {
+		t.Fatalf("metadata not preserved in proto endpoint")
+	}
+}

api/payments/orchestrator/internal/service/orchestrator/handlers_commands.go

@@ -0,0 +1,446 @@
+package orchestrator
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"time"
+
+	"github.com/tech/sendico/payments/orchestrator/storage"
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	"github.com/tech/sendico/pkg/api/routers/gsresponse"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"github.com/tech/sendico/pkg/mservice"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.uber.org/zap"
+)
+
+type quotePaymentCommand struct {
+	engine paymentEngine
+	logger mlogger.Logger
+}
+
+func (h *quotePaymentCommand) Execute(ctx context.Context, req *orchestratorv1.QuotePaymentRequest) gsresponse.Responder[orchestratorv1.QuotePaymentResponse] {
+	if err := h.engine.EnsureRepository(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.QuotePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	orgRef, orgID, err := validateMetaAndOrgRef(req.GetMeta())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if err := requireNonNilIntent(req.GetIntent()); err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	intent := req.GetIntent()
+
+	quote, expiresAt, err := h.engine.BuildPaymentQuote(ctx, orgRef, req)
+	if err != nil {
+		return gsresponse.Auto[orchestratorv1.QuotePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	if !req.GetPreviewOnly() {
+		quotesStore, err := ensureQuotesStore(h.engine.Repository())
+		if err != nil {
+			return gsresponse.Unavailable[orchestratorv1.QuotePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		quoteRef := primitive.NewObjectID().Hex()
+		quote.QuoteRef = quoteRef
+		record := &model.PaymentQuoteRecord{
+			QuoteRef:  quoteRef,
+			Intent:    intentFromProto(intent),
+			Quote:     quoteSnapshotToModel(quote),
+			ExpiresAt: expiresAt,
+		}
+		record.SetID(primitive.NewObjectID())
+		record.SetOrganizationRef(orgID)
+		if err := quotesStore.Create(ctx, record); err != nil {
+			return gsresponse.Auto[orchestratorv1.QuotePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		h.logger.Info("stored payment quote", zap.String("quote_ref", quoteRef), zap.String("org_ref", orgID.Hex()))
+	}
+
+	return gsresponse.Success(&orchestratorv1.QuotePaymentResponse{Quote: quote})
+}
+
+type quotePaymentsCommand struct {
+	engine paymentEngine
+	logger mlogger.Logger
+}
+
+func (h *quotePaymentsCommand) Execute(ctx context.Context, req *orchestratorv1.QuotePaymentsRequest) gsresponse.Responder[orchestratorv1.QuotePaymentsResponse] {
+	if err := h.engine.EnsureRepository(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	orgRef, orgID, err := validateMetaAndOrgRef(req.GetMeta())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	intents := req.GetIntents()
+	if len(intents) == 0 {
+		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("intents are required"))
+	}
+
+	baseKey := strings.TrimSpace(req.GetIdempotencyKey())
+	quotes := make([]*orchestratorv1.PaymentQuote, 0, len(intents))
+	expires := make([]time.Time, 0, len(intents))
+	for i, intent := range intents {
+		if err := requireNonNilIntent(intent); err != nil {
+			return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		quoteReq := &orchestratorv1.QuotePaymentRequest{
+			Meta:           req.GetMeta(),
+			IdempotencyKey: perIntentIdempotencyKey(baseKey, i, len(intents)),
+			Intent:         intent,
+			PreviewOnly:    req.GetPreviewOnly(),
+		}
+		quote, expiresAt, err := h.engine.BuildPaymentQuote(ctx, orgRef, quoteReq)
+		if err != nil {
+			return gsresponse.Auto[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		quotes = append(quotes, quote)
+		expires = append(expires, expiresAt)
+	}
+
+	aggregate, err := aggregatePaymentQuotes(quotes)
+	if err != nil {
+		return gsresponse.Auto[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InternalWrap(err, "quote aggregation failed"))
+	}
+	expiresAt, ok := minQuoteExpiry(expires)
+	if !ok {
+		return gsresponse.Auto[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.Internal("quote expiry missing"))
+	}
+
+	quoteRef := ""
+	if !req.GetPreviewOnly() {
+		quotesStore, err := ensureQuotesStore(h.engine.Repository())
+		if err != nil {
+			return gsresponse.Unavailable[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		quoteRef = primitive.NewObjectID().Hex()
+		record := &model.PaymentQuoteRecord{
+			QuoteRef:  quoteRef,
+			Intents:   intentsFromProto(intents),
+			Quotes:    quoteSnapshotsFromProto(quotes),
+			ExpiresAt: expiresAt,
+		}
+		record.SetID(primitive.NewObjectID())
+		record.SetOrganizationRef(orgID)
+		if err := quotesStore.Create(ctx, record); err != nil {
+			return gsresponse.Auto[orchestratorv1.QuotePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		h.logger.Info("stored payment quotes", zap.String("quote_ref", quoteRef), zap.String("org_ref", orgID.Hex()))
+	}
+
+	return gsresponse.Success(&orchestratorv1.QuotePaymentsResponse{
+		QuoteRef:  quoteRef,
+		Aggregate: aggregate,
+		Quotes:    quotes,
+	})
+}
+
+type initiatePaymentsCommand struct {
+	engine paymentEngine
+	logger mlogger.Logger
+}
+
+func (h *initiatePaymentsCommand) Execute(ctx context.Context, req *orchestratorv1.InitiatePaymentsRequest) gsresponse.Responder[orchestratorv1.InitiatePaymentsResponse] {
+	if err := h.engine.EnsureRepository(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	_, orgID, err := validateMetaAndOrgRef(req.GetMeta())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	idempotencyKey, err := requireIdempotencyKey(req.GetIdempotencyKey())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	quoteRef := strings.TrimSpace(req.GetQuoteRef())
+	if quoteRef == "" {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("quote_ref is required"))
+	}
+
+	quotesStore, err := ensureQuotesStore(h.engine.Repository())
+	if err != nil {
+		return gsresponse.Unavailable[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	record, err := quotesStore.GetByRef(ctx, orgID, quoteRef)
+	if err != nil {
+		if errors.Is(err, storage.ErrQuoteNotFound) {
+			return gsresponse.FailedPrecondition[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, "quote_not_found", merrors.InvalidArgument("quote_ref not found or expired"))
+		}
+		return gsresponse.Auto[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	intents := record.Intents
+	quotes := record.Quotes
+	if len(intents) == 0 && record.Intent.Kind != "" && record.Intent.Kind != model.PaymentKindUnspecified {
+		intents = []model.PaymentIntent{record.Intent}
+	}
+	if len(quotes) == 0 && record.Quote != nil {
+		quotes = []*model.PaymentQuoteSnapshot{record.Quote}
+	}
+	if len(intents) == 0 || len(quotes) == 0 || len(intents) != len(quotes) {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("stored quote payload is incomplete"))
+	}
+
+	store, err := ensurePaymentsStore(h.engine.Repository())
+	if err != nil {
+		return gsresponse.Unavailable[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	payments := make([]*orchestratorv1.Payment, 0, len(intents))
+	for i := range intents {
+		intentProto := protoIntentFromModel(intents[i])
+		if err := requireNonNilIntent(intentProto); err != nil {
+			return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		quoteProto := modelQuoteToProto(quotes[i])
+		if quoteProto == nil {
+			return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("stored quote is empty"))
+		}
+		quoteProto.QuoteRef = quoteRef
+
+		perKey := perIntentIdempotencyKey(idempotencyKey, i, len(intents))
+		if existing, err := getPaymentByIdempotencyKey(ctx, store, orgID, perKey); err == nil && existing != nil {
+			payments = append(payments, toProtoPayment(existing))
+			continue
+		} else if err != nil && !errors.Is(err, storage.ErrPaymentNotFound) {
+			return gsresponse.Auto[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+
+		entity := newPayment(orgID, intentProto, perKey, req.GetMetadata(), quoteProto)
+		if err = store.Create(ctx, entity); err != nil {
+			if errors.Is(err, storage.ErrDuplicatePayment) {
+				return gsresponse.Auto[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.DataConflict("payment already exists"))
+			}
+			return gsresponse.Auto[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+
+		if err := h.engine.ExecutePayment(ctx, store, entity, quoteProto); err != nil {
+			return gsresponse.Auto[orchestratorv1.InitiatePaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+
+		payments = append(payments, toProtoPayment(entity))
+	}
+
+	return gsresponse.Success(&orchestratorv1.InitiatePaymentsResponse{Payments: payments})
+}
+
+type initiatePaymentCommand struct {
+	engine paymentEngine
+	logger mlogger.Logger
+}
+
+func (h *initiatePaymentCommand) Execute(ctx context.Context, req *orchestratorv1.InitiatePaymentRequest) gsresponse.Responder[orchestratorv1.InitiatePaymentResponse] {
+	if err := h.engine.EnsureRepository(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	orgRef, orgID, err := validateMetaAndOrgRef(req.GetMeta())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	intent := req.GetIntent()
+	if err := requireNonNilIntent(intent); err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	idempotencyKey, err := requireIdempotencyKey(req.GetIdempotencyKey())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	store, err := ensurePaymentsStore(h.engine.Repository())
+	if err != nil {
+		return gsresponse.Unavailable[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	if existing, err := getPaymentByIdempotencyKey(ctx, store, orgID, idempotencyKey); err == nil && existing != nil {
+		h.logger.Debug("idempotent payment request reused", zap.String("payment_ref", existing.PaymentRef), zap.String("org_ref", orgID.Hex()))
+		return gsresponse.Success(&orchestratorv1.InitiatePaymentResponse{Payment: toProtoPayment(existing)})
+	} else if err != nil && !errors.Is(err, storage.ErrPaymentNotFound) {
+		return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	quoteSnapshot, err := h.engine.ResolvePaymentQuote(ctx, quoteResolutionInput{
+		OrgRef:         orgRef,
+		OrgID:          orgID,
+		Meta:           req.GetMeta(),
+		Intent:         intent,
+		QuoteRef:       req.GetQuoteRef(),
+		IdempotencyKey: req.GetIdempotencyKey(),
+	})
+	if err != nil {
+		if qerr, ok := err.(quoteResolutionError); ok {
+			switch qerr.code {
+			case "quote_not_found":
+				return gsresponse.FailedPrecondition[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, qerr.code, qerr.err)
+			case "quote_expired":
+				return gsresponse.FailedPrecondition[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, qerr.code, qerr.err)
+			case "quote_intent_mismatch":
+				return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, qerr.err)
+			default:
+				return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, qerr.err)
+			}
+		}
+		return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if quoteSnapshot == nil {
+		quoteSnapshot = &orchestratorv1.PaymentQuote{}
+	}
+
+	entity := newPayment(orgID, intent, idempotencyKey, req.GetMetadata(), quoteSnapshot)
+
+	if err = store.Create(ctx, entity); err != nil {
+		if errors.Is(err, storage.ErrDuplicatePayment) {
+			return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, merrors.DataConflict("payment already exists"))
+		}
+		return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	if err := h.engine.ExecutePayment(ctx, store, entity, quoteSnapshot); err != nil {
+		return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	h.logger.Info("payment initiated", zap.String("payment_ref", entity.PaymentRef), zap.String("org_ref", orgID.Hex()), zap.String("kind", intent.GetKind().String()))
+	return gsresponse.Success(&orchestratorv1.InitiatePaymentResponse{
+		Payment: toProtoPayment(entity),
+	})
+}
+
+type cancelPaymentCommand struct {
+	engine paymentEngine
+	logger mlogger.Logger
+}
+
+func (h *cancelPaymentCommand) Execute(ctx context.Context, req *orchestratorv1.CancelPaymentRequest) gsresponse.Responder[orchestratorv1.CancelPaymentResponse] {
+	if err := h.engine.EnsureRepository(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.CancelPaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.CancelPaymentResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	paymentRef, err := requirePaymentRef(req.GetPaymentRef())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.CancelPaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	store, err := ensurePaymentsStore(h.engine.Repository())
+	if err != nil {
+		return gsresponse.Unavailable[orchestratorv1.CancelPaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	payment, err := store.GetByPaymentRef(ctx, paymentRef)
+	if err != nil {
+		return paymentNotFoundResponder[orchestratorv1.CancelPaymentResponse](mservice.PaymentOrchestrator, h.logger, err)
+	}
+	if payment.State != model.PaymentStateAccepted {
+		reason := merrors.InvalidArgument("payment cannot be cancelled in current state")
+		return gsresponse.FailedPrecondition[orchestratorv1.CancelPaymentResponse](h.logger, mservice.PaymentOrchestrator, "payment_not_cancellable", reason)
+	}
+	payment.State = model.PaymentStateCancelled
+	payment.FailureCode = model.PaymentFailureCodePolicy
+	payment.FailureReason = strings.TrimSpace(req.GetReason())
+	if err := store.Update(ctx, payment); err != nil {
+		return gsresponse.Auto[orchestratorv1.CancelPaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	h.logger.Info("payment cancelled", zap.String("payment_ref", payment.PaymentRef), zap.String("org_ref", payment.OrganizationRef.Hex()))
+	return gsresponse.Success(&orchestratorv1.CancelPaymentResponse{Payment: toProtoPayment(payment)})
+}
+
+type initiateConversionCommand struct {
+	engine paymentEngine
+	logger mlogger.Logger
+}
+
+func (h *initiateConversionCommand) Execute(ctx context.Context, req *orchestratorv1.InitiateConversionRequest) gsresponse.Responder[orchestratorv1.InitiateConversionResponse] {
+	if err := h.engine.EnsureRepository(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	orgRef, orgID, err := validateMetaAndOrgRef(req.GetMeta())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	idempotencyKey, err := requireIdempotencyKey(req.GetIdempotencyKey())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req.GetSource() == nil || req.GetSource().GetLedger() == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("source ledger endpoint is required"))
+	}
+	if req.GetDestination() == nil || req.GetDestination().GetLedger() == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("destination ledger endpoint is required"))
+	}
+	fxIntent := req.GetFx()
+	if fxIntent == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("fx intent is required"))
+	}
+
+	store, err := ensurePaymentsStore(h.engine.Repository())
+	if err != nil {
+		return gsresponse.Unavailable[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	if existing, err := getPaymentByIdempotencyKey(ctx, store, orgID, idempotencyKey); err == nil && existing != nil {
+		h.logger.Debug("idempotent conversion request reused", zap.String("payment_ref", existing.PaymentRef), zap.String("org_ref", orgID.Hex()))
+		return gsresponse.Success(&orchestratorv1.InitiateConversionResponse{Conversion: toProtoPayment(existing)})
+	} else if err != nil && !errors.Is(err, storage.ErrPaymentNotFound) {
+		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	amount, err := conversionAmountFromMetadata(req.GetMetadata(), fxIntent)
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	intentProto := &orchestratorv1.PaymentIntent{
+		Kind:        orchestratorv1.PaymentKind_PAYMENT_KIND_FX_CONVERSION,
+		Source:      req.GetSource(),
+		Destination: req.GetDestination(),
+		Amount:      amount,
+		RequiresFx:  true,
+		Fx:          fxIntent,
+		FeePolicy:   req.GetFeePolicy(),
+	}
+
+	quote, _, err := h.engine.BuildPaymentQuote(ctx, orgRef, &orchestratorv1.QuotePaymentRequest{
+		Meta:           req.GetMeta(),
+		IdempotencyKey: req.GetIdempotencyKey(),
+		Intent:         intentProto,
+	})
+	if err != nil {
+		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	entity := newPayment(orgID, intentProto, idempotencyKey, req.GetMetadata(), quote)
+
+	if err = store.Create(ctx, entity); err != nil {
+		if errors.Is(err, storage.ErrDuplicatePayment) {
+			return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, merrors.DataConflict("payment already exists"))
+		}
+		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	if err := h.engine.ExecutePayment(ctx, store, entity, quote); err != nil {
+		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	h.logger.Info("conversion initiated", zap.String("payment_ref", entity.PaymentRef), zap.String("org_ref", orgID.Hex()))
+	return gsresponse.Success(&orchestratorv1.InitiateConversionResponse{
+		Conversion: toProtoPayment(entity),
+	})
+}

api/payments/orchestrator/internal/service/orchestrator/handlers_events.go

@@ -0,0 +1,139 @@
+package orchestrator
+
+import (
+	"context"
+	"strings"
+
+	"github.com/tech/sendico/payments/orchestrator/storage"
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	"github.com/tech/sendico/pkg/api/routers/gsresponse"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"github.com/tech/sendico/pkg/mservice"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+	"go.uber.org/zap"
+)
+
+type paymentEventHandler struct {
+	repo       storage.Repository
+	ensureRepo func(ctx context.Context) error
+	logger     mlogger.Logger
+}
+
+func newPaymentEventHandler(repo storage.Repository, ensure func(ctx context.Context) error, logger mlogger.Logger) *paymentEventHandler {
+	return &paymentEventHandler{
+		repo:       repo,
+		ensureRepo: ensure,
+		logger:     logger,
+	}
+}
+
+func (h *paymentEventHandler) processTransferUpdate(ctx context.Context, req *orchestratorv1.ProcessTransferUpdateRequest) gsresponse.Responder[orchestratorv1.ProcessTransferUpdateResponse] {
+	if err := h.ensureRepo(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.ProcessTransferUpdateResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil || req.GetEvent() == nil || req.GetEvent().GetTransfer() == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.ProcessTransferUpdateResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("transfer event is required"))
+	}
+	transfer := req.GetEvent().GetTransfer()
+	transferRef := strings.TrimSpace(transfer.GetTransferRef())
+	if transferRef == "" {
+		return gsresponse.InvalidArgument[orchestratorv1.ProcessTransferUpdateResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("transfer_ref is required"))
+	}
+	store := h.repo.Payments()
+	if store == nil {
+		return gsresponse.Unavailable[orchestratorv1.ProcessTransferUpdateResponse](h.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
+	}
+	payment, err := store.GetByChainTransferRef(ctx, transferRef)
+	if err != nil {
+		return paymentNotFoundResponder[orchestratorv1.ProcessTransferUpdateResponse](mservice.PaymentOrchestrator, h.logger, err)
+	}
+	applyTransferStatus(req.GetEvent(), payment)
+	if err := store.Update(ctx, payment); err != nil {
+		return gsresponse.Auto[orchestratorv1.ProcessTransferUpdateResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	h.logger.Info("transfer update applied", zap.String("payment_ref", payment.PaymentRef), zap.String("transfer_ref", transferRef), zap.Any("state", payment.State))
+	return gsresponse.Success(&orchestratorv1.ProcessTransferUpdateResponse{Payment: toProtoPayment(payment)})
+}
+
+func (h *paymentEventHandler) processDepositObserved(ctx context.Context, req *orchestratorv1.ProcessDepositObservedRequest) gsresponse.Responder[orchestratorv1.ProcessDepositObservedResponse] {
+	if err := h.ensureRepo(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.ProcessDepositObservedResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil || req.GetEvent() == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.ProcessDepositObservedResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("deposit event is required"))
+	}
+	event := req.GetEvent()
+	walletRef := strings.TrimSpace(event.GetWalletRef())
+	if walletRef == "" {
+		return gsresponse.InvalidArgument[orchestratorv1.ProcessDepositObservedResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("wallet_ref is required"))
+	}
+	store := h.repo.Payments()
+	if store == nil {
+		return gsresponse.Unavailable[orchestratorv1.ProcessDepositObservedResponse](h.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
+	}
+	filter := &model.PaymentFilter{
+		States:         []model.PaymentState{model.PaymentStateSubmitted, model.PaymentStateFundsReserved},
+		DestinationRef: walletRef,
+	}
+	result, err := store.List(ctx, filter)
+	if err != nil {
+		return gsresponse.Auto[orchestratorv1.ProcessDepositObservedResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	for _, payment := range result.Items {
+		if payment.Intent.Destination.Type != model.EndpointTypeManagedWallet {
+			continue
+		}
+		if !moneyEquals(payment.Intent.Amount, event.GetAmount()) {
+			continue
+		}
+		payment.State = model.PaymentStateSettled
+		payment.FailureCode = model.PaymentFailureCodeUnspecified
+		payment.FailureReason = ""
+		if payment.Execution == nil {
+			payment.Execution = &model.ExecutionRefs{}
+		}
+		if payment.Execution.ChainTransferRef == "" {
+			payment.Execution.ChainTransferRef = strings.TrimSpace(event.GetTransactionHash())
+		}
+		if err := store.Update(ctx, payment); err != nil {
+			return gsresponse.Auto[orchestratorv1.ProcessDepositObservedResponse](h.logger, mservice.PaymentOrchestrator, err)
+		}
+		h.logger.Info("deposit observed matched payment", zap.String("payment_ref", payment.PaymentRef), zap.String("wallet_ref", walletRef))
+		return gsresponse.Success(&orchestratorv1.ProcessDepositObservedResponse{Payment: toProtoPayment(payment)})
+	}
+	return gsresponse.Success(&orchestratorv1.ProcessDepositObservedResponse{})
+}
+
+func (h *paymentEventHandler) processCardPayoutUpdate(ctx context.Context, req *orchestratorv1.ProcessCardPayoutUpdateRequest) gsresponse.Responder[orchestratorv1.ProcessCardPayoutUpdateResponse] {
+	if err := h.ensureRepo(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.ProcessCardPayoutUpdateResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil || req.GetEvent() == nil || req.GetEvent().GetPayout() == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.ProcessCardPayoutUpdateResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("event is required"))
+	}
+	payout := req.GetEvent().GetPayout()
+	paymentRef := strings.TrimSpace(payout.GetPayoutId())
+	if paymentRef == "" {
+		return gsresponse.InvalidArgument[orchestratorv1.ProcessCardPayoutUpdateResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("payout_id is required"))
+	}
+
+	store := h.repo.Payments()
+	if store == nil {
+		return gsresponse.Unavailable[orchestratorv1.ProcessCardPayoutUpdateResponse](h.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
+	}
+	payment, err := store.GetByPaymentRef(ctx, paymentRef)
+	if err != nil {
+		return paymentNotFoundResponder[orchestratorv1.ProcessCardPayoutUpdateResponse](mservice.PaymentOrchestrator, h.logger, err)
+	}
+
+	applyCardPayoutUpdate(payment, payout)
+	if err := store.Update(ctx, payment); err != nil {
+		return gsresponse.Auto[orchestratorv1.ProcessCardPayoutUpdateResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+
+	h.logger.Info("card payout update applied", zap.String("payment_ref", payment.PaymentRef), zap.String("payout_id", paymentRef), zap.Any("state", payment.State))
+	return gsresponse.Success(&orchestratorv1.ProcessCardPayoutUpdateResponse{
+		Payment: toProtoPayment(payment),
+	})
+}

api/payments/orchestrator/internal/service/orchestrator/handlers_queries.go

@@ -0,0 +1,80 @@
+package orchestrator
+
+import (
+	"context"
+
+	"github.com/tech/sendico/payments/orchestrator/storage"
+	"github.com/tech/sendico/pkg/api/routers/gsresponse"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"github.com/tech/sendico/pkg/mservice"
+	paginationv1 "github.com/tech/sendico/pkg/proto/common/pagination/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+	"go.uber.org/zap"
+)
+
+type paymentQueryHandler struct {
+	repo       storage.Repository
+	ensureRepo func(ctx context.Context) error
+	logger     mlogger.Logger
+}
+
+func newPaymentQueryHandler(repo storage.Repository, ensure func(ctx context.Context) error, logger mlogger.Logger) *paymentQueryHandler {
+	return &paymentQueryHandler{
+		repo:       repo,
+		ensureRepo: ensure,
+		logger:     logger,
+	}
+}
+
+func (h *paymentQueryHandler) getPayment(ctx context.Context, req *orchestratorv1.GetPaymentRequest) gsresponse.Responder[orchestratorv1.GetPaymentResponse] {
+	if err := h.ensureRepo(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.GetPaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.GetPaymentResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	paymentRef, err := requirePaymentRef(req.GetPaymentRef())
+	if err != nil {
+		return gsresponse.InvalidArgument[orchestratorv1.GetPaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	store, err := ensurePaymentsStore(h.repo)
+	if err != nil {
+		return gsresponse.Unavailable[orchestratorv1.GetPaymentResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	entity, err := store.GetByPaymentRef(ctx, paymentRef)
+	if err != nil {
+		return paymentNotFoundResponder[orchestratorv1.GetPaymentResponse](mservice.PaymentOrchestrator, h.logger, err)
+	}
+	h.logger.Debug("payment fetched", zap.String("payment_ref", paymentRef))
+	return gsresponse.Success(&orchestratorv1.GetPaymentResponse{Payment: toProtoPayment(entity)})
+}
+
+func (h *paymentQueryHandler) listPayments(ctx context.Context, req *orchestratorv1.ListPaymentsRequest) gsresponse.Responder[orchestratorv1.ListPaymentsResponse] {
+	if err := h.ensureRepo(ctx); err != nil {
+		return gsresponse.Unavailable[orchestratorv1.ListPaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	if req == nil {
+		return gsresponse.InvalidArgument[orchestratorv1.ListPaymentsResponse](h.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
+	}
+	store, err := ensurePaymentsStore(h.repo)
+	if err != nil {
+		return gsresponse.Unavailable[orchestratorv1.ListPaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	filter := filterFromProto(req)
+	result, err := store.List(ctx, filter)
+	if err != nil {
+		return gsresponse.Auto[orchestratorv1.ListPaymentsResponse](h.logger, mservice.PaymentOrchestrator, err)
+	}
+	resp := &orchestratorv1.ListPaymentsResponse{
+		Page: &paginationv1.CursorPageResponse{
+			NextCursor: result.NextCursor,
+		},
+	}
+	resp.Payments = make([]*orchestratorv1.Payment, 0, len(result.Items))
+	for _, item := range result.Items {
+		resp.Payments = append(resp.Payments, toProtoPayment(item))
+	}
+	h.logger.Debug("payments listed", zap.Int("count", len(resp.Payments)), zap.String("next_cursor", resp.GetPage().GetNextCursor()))
+	return gsresponse.Success(resp)
+}

api/payments/orchestrator/internal/service/orchestrator/helpers.go

@@ -145,7 +145,7 @@ func resolveTradeAmounts(intentAmount *moneyv1.Money, fxQuote *oraclev1.Quote, s
 	}
 }
 
-func computeAggregates(pay, settlement, fee *moneyv1.Money, network *chainv1.EstimateTransferFeeResponse, fxQuote *oraclev1.Quote) (*moneyv1.Money, *moneyv1.Money) {
+func computeAggregates(pay, settlement, fee *moneyv1.Money, network *chainv1.EstimateTransferFeeResponse, fxQuote *oraclev1.Quote, mode orchestratorv1.SettlementMode) (*moneyv1.Money, *moneyv1.Money) {
 	if pay == nil {
 		return nil, nil
 	}
@@ -166,7 +166,7 @@ func computeAggregates(pay, settlement, fee *moneyv1.Money, network *chainv1.Est
 		}
 	}
 
-	adjustDebit := func(m *moneyv1.Money) {
+	applyChargeToDebit := func(m *moneyv1.Money) {
 		converted, err := ensureCurrency(m, pay.GetCurrency(), fxQuote)
 		if err != nil || converted == nil {
 			return
@@ -176,7 +176,7 @@ func computeAggregates(pay, settlement, fee *moneyv1.Money, network *chainv1.Est
 		}
 	}
 
-	adjustSettlement := func(m *moneyv1.Money) {
+	applyChargeToSettlement := func(m *moneyv1.Money) {
 		converted, err := ensureCurrency(m, settlementCurrency, fxQuote)
 		if err != nil || converted == nil {
 			return
@@ -186,12 +186,22 @@ func computeAggregates(pay, settlement, fee *moneyv1.Money, network *chainv1.Est
 		}
 	}
 
-	adjustDebit(fee)
+	switch mode {
-	adjustSettlement(fee)
+	case orchestratorv1.SettlementMode_SETTLEMENT_MODE_FIX_RECEIVED:
+		// Sender pays the fee: keep settlement fixed, increase debit.
+		applyChargeToDebit(fee)
+	default:
+		// Recipient pays the fee (default): reduce settlement, keep debit fixed.
+		applyChargeToSettlement(fee)
+	}
 
 	if network != nil && network.GetNetworkFee() != nil {
-		adjustDebit(network.GetNetworkFee())
+		switch mode {
-		adjustSettlement(network.GetNetworkFee())
+		case orchestratorv1.SettlementMode_SETTLEMENT_MODE_FIX_RECEIVED:
+			applyChargeToDebit(network.GetNetworkFee())
+		default:
+			applyChargeToSettlement(network.GetNetworkFee())
+		}
 	}
 
 	return makeMoney(pay.GetCurrency(), debitDecimal), makeMoney(settlementCurrency, settlementDecimal)
@@ -204,20 +214,6 @@ func decimalFromMoney(m *moneyv1.Money) (decimal.Decimal, error) {
 	return decimal.NewFromString(m.GetAmount())
 }
 
-func decimalFromMoneyMatching(reference, candidate *moneyv1.Money) (*decimal.Decimal, error) {
-	if reference == nil || candidate == nil {
-		return nil, nil
-	}
-	if !strings.EqualFold(reference.GetCurrency(), candidate.GetCurrency()) {
-		return nil, nil
-	}
-	value, err := decimal.NewFromString(candidate.GetAmount())
-	if err != nil {
-		return nil, err
-	}
-	return &value, nil
-}
-
 func makeMoney(currency string, value decimal.Decimal) *moneyv1.Money {
 	return &moneyv1.Money{
 		Currency: currency,
@@ -383,6 +379,22 @@ func feeBreakdownFromQuote(quote *orchestratorv1.PaymentQuote) []*chainv1.Servic
 	return breakdown
 }
 
+func assignLedgerAccounts(lines []*feesv1.DerivedPostingLine, account string) []*feesv1.DerivedPostingLine {
+	if account == "" || len(lines) == 0 {
+		return lines
+	}
+	for _, line := range lines {
+		if line == nil {
+			continue
+		}
+		if strings.TrimSpace(line.GetLedgerAccountRef()) != "" {
+			continue
+		}
+		line.LedgerAccountRef = account
+	}
+	return lines
+}
+
 func moneyEquals(a, b *moneyv1.Money) bool {
 	if a == nil || b == nil {
 		return false

api/payments/orchestrator/internal/service/orchestrator/helpers_test.go

@@ -7,6 +7,7 @@ import (
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
 	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
 )
 
 func TestResolveTradeAmountsBuyBase(t *testing.T) {
@@ -47,11 +48,32 @@ func TestComputeAggregatesConvertsCurrencies(t *testing.T) {
 		},
 	}
 
-	debit, settlement := computeAggregates(pay, settle, fee, network, fxQuote)
+	debit, settlement := computeAggregates(pay, settle, fee, network, fxQuote, orchestratorv1.SettlementMode_SETTLEMENT_MODE_FIX_RECEIVED)
 	if debit.GetCurrency() != "USD" || debit.GetAmount() != "115" {
 		t.Fatalf("expected debit 115 USD, got %s %s", debit.GetCurrency(), debit.GetAmount())
 	}
-	if settlement.GetCurrency() != "EUR" || settlement.GetAmount() != "42.5" {
+	if settlement.GetCurrency() != "EUR" || settlement.GetAmount() != "50" {
-		t.Fatalf("expected settlement 42.5 EUR, got %s %s", settlement.GetCurrency(), settlement.GetAmount())
+		t.Fatalf("expected settlement 50 EUR, got %s %s", settlement.GetCurrency(), settlement.GetAmount())
+	}
+}
+
+func TestComputeAggregatesRecipientPaysFee(t *testing.T) {
+	pay := &moneyv1.Money{Currency: "USDT", Amount: "100"}
+	settle := &moneyv1.Money{Currency: "RUB", Amount: "7932"} // 100 * 79.32
+	fee := &moneyv1.Money{Currency: "USDT", Amount: "7"}      // 7% of 100
+	fxQuote := &oraclev1.Quote{
+		Pair: &fxv1.CurrencyPair{Base: "USDT", Quote: "RUB"},
+		Side: fxv1.Side_SELL_BASE_BUY_QUOTE,
+		Price: &moneyv1.Decimal{
+			Value: "79.32",
+		},
+	}
+
+	debit, settlement := computeAggregates(pay, settle, fee, nil, fxQuote, orchestratorv1.SettlementMode_SETTLEMENT_MODE_FIX_SOURCE)
+	if debit.GetCurrency() != "USDT" || debit.GetAmount() != "100" {
+		t.Fatalf("expected debit 100 USDT, got %s %s", debit.GetCurrency(), debit.GetAmount())
+	}
+	if settlement.GetCurrency() != "RUB" || settlement.GetAmount() != "7376.76" {
+		t.Fatalf("expected settlement 7376.76 RUB, got %s %s", settlement.GetCurrency(), settlement.GetAmount())
 	}
 }

api/payments/orchestrator/internal/service/orchestrator/internal_helpers.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"time"
 
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
 	"github.com/tech/sendico/pkg/api/routers/gsresponse"
 	"github.com/tech/sendico/pkg/mservice"
 	feesv1 "github.com/tech/sendico/pkg/proto/billing/fees/v1"
+	mntxv1 "github.com/tech/sendico/pkg/proto/gateway/mntx/v1"
 	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
 )
 
@@ -51,10 +53,17 @@ func shouldEstimateNetworkFee(intent *orchestratorv1.PaymentIntent) bool {
 	if intent == nil {
 		return false
 	}
+	dest := intent.GetDestination()
+	if dest == nil {
+		return false
+	}
+	if dest.GetCard() != nil {
+		return false
+	}
 	if intent.GetKind() == orchestratorv1.PaymentKind_PAYMENT_KIND_PAYOUT {
 		return true
 	}
-	if intent.GetDestination().GetManagedWallet() != nil || intent.GetDestination().GetExternalChain() != nil {
+	if dest.GetManagedWallet() != nil || dest.GetExternalChain() != nil {
 		return true
 	}
 	return false
@@ -69,3 +78,16 @@ func shouldRequestFX(intent *orchestratorv1.PaymentIntent) bool {
 	}
 	return intent.GetFx() != nil && intent.GetFx().GetPair() != nil
 }
+
+func mapMntxStatusToState(status mntxv1.PayoutStatus) model.PaymentState {
+	switch status {
+	case mntxv1.PayoutStatus_PAYOUT_STATUS_PROCESSED:
+		return model.PaymentStateSettled
+	case mntxv1.PayoutStatus_PAYOUT_STATUS_FAILED:
+		return model.PaymentStateFailed
+	case mntxv1.PayoutStatus_PAYOUT_STATUS_PENDING:
+		return model.PaymentStateSubmitted
+	default:
+		return model.PaymentStateUnspecified
+	}
+}

api/payments/orchestrator/internal/service/orchestrator/internal_helpers_test.go

@@ -0,0 +1,51 @@
+package orchestrator
+
+import (
+	"testing"
+
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	mntxv1 "github.com/tech/sendico/pkg/proto/gateway/mntx/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+)
+
+func TestShouldEstimateNetworkFeeSkipsCard(t *testing.T) {
+	intent := &orchestratorv1.PaymentIntent{
+		Kind: orchestratorv1.PaymentKind_PAYMENT_KIND_PAYOUT,
+		Destination: &orchestratorv1.PaymentEndpoint{
+			Endpoint: &orchestratorv1.PaymentEndpoint_Card{
+				Card: &orchestratorv1.CardEndpoint{},
+			},
+		},
+	}
+	if shouldEstimateNetworkFee(intent) {
+		t.Fatalf("expected network fee estimation to be skipped for card payouts")
+	}
+}
+
+func TestShouldEstimateNetworkFeeManagedWallet(t *testing.T) {
+	intent := &orchestratorv1.PaymentIntent{
+		Destination: &orchestratorv1.PaymentEndpoint{
+			Endpoint: &orchestratorv1.PaymentEndpoint_ManagedWallet{
+				ManagedWallet: &orchestratorv1.ManagedWalletEndpoint{ManagedWalletRef: "mw"},
+			},
+		},
+	}
+	if !shouldEstimateNetworkFee(intent) {
+		t.Fatalf("expected network fee estimation when destination is managed wallet")
+	}
+}
+
+func TestMapMntxStatusToState(t *testing.T) {
+	if mapMntxStatusToState(mntxv1.PayoutStatus_PAYOUT_STATUS_PROCESSED) != model.PaymentStateSettled {
+		t.Fatalf("processed should map to settled")
+	}
+	if mapMntxStatusToState(mntxv1.PayoutStatus_PAYOUT_STATUS_FAILED) != model.PaymentStateFailed {
+		t.Fatalf("failed should map to failed")
+	}
+	if mapMntxStatusToState(mntxv1.PayoutStatus_PAYOUT_STATUS_PENDING) != model.PaymentStateSubmitted {
+		t.Fatalf("pending should map to submitted")
+	}
+	if mapMntxStatusToState(mntxv1.PayoutStatus_PAYOUT_STATUS_UNSPECIFIED) != model.PaymentStateUnspecified {
+		t.Fatalf("unspecified should map to unspecified")
+	}
+}

api/payments/orchestrator/internal/service/orchestrator/options.go

@@ -1,10 +1,12 @@
 package orchestrator
 
 import (
+	"strings"
 	"time"
 
 	oracleclient "github.com/tech/sendico/fx/oracle/client"
 	chainclient "github.com/tech/sendico/gateway/chain/client"
+	mntxclient "github.com/tech/sendico/gateway/mntx/client"
 	ledgerclient "github.com/tech/sendico/ledger/client"
 	clockpkg "github.com/tech/sendico/pkg/clock"
 	feesv1 "github.com/tech/sendico/pkg/proto/billing/fees/v1"
@@ -46,10 +48,24 @@ func (o oracleDependency) available() bool {
 	return o.client != nil
 }
 
+type mntxDependency struct {
+	client mntxclient.Client
+}
+
+func (m mntxDependency) available() bool {
+	return m.client != nil
+}
+
+// CardGatewayRoute maps a gateway to its funding and fee destinations (addresses).
+type CardGatewayRoute struct {
+	FundingAddress string
+	FeeAddress     string
+}
+
 // WithFeeEngine wires the fee engine client.
 func WithFeeEngine(client feesv1.FeeEngineClient, timeout time.Duration) Option {
 	return func(s *Service) {
-		s.fees = feesDependency{
+		s.deps.fees = feesDependency{
 			client:  client,
 			timeout: timeout,
 		}
@@ -59,21 +75,59 @@ func WithFeeEngine(client feesv1.FeeEngineClient, timeout time.Duration) Option
 // WithLedgerClient wires the ledger client.
 func WithLedgerClient(client ledgerclient.Client) Option {
 	return func(s *Service) {
-		s.ledger = ledgerDependency{client: client}
+		s.deps.ledger = ledgerDependency{client: client}
 	}
 }
 
 // WithChainGatewayClient wires the chain gateway client.
 func WithChainGatewayClient(client chainclient.Client) Option {
 	return func(s *Service) {
-		s.gateway = gatewayDependency{client: client}
+		s.deps.gateway = gatewayDependency{client: client}
 	}
 }
 
 // WithOracleClient wires the FX oracle client.
 func WithOracleClient(client oracleclient.Client) Option {
 	return func(s *Service) {
-		s.oracle = oracleDependency{client: client}
+		s.deps.oracle = oracleDependency{client: client}
+	}
+}
+
+// WithMntxGateway wires the Monetix gateway client.
+func WithMntxGateway(client mntxclient.Client) Option {
+	return func(s *Service) {
+		s.deps.mntx = mntxDependency{client: client}
+	}
+}
+
+// WithCardGatewayRoutes configures funding/fee wallet routing per gateway.
+func WithCardGatewayRoutes(routes map[string]CardGatewayRoute) Option {
+	return func(s *Service) {
+		if len(routes) == 0 {
+			return
+		}
+		s.deps.cardRoutes = make(map[string]CardGatewayRoute, len(routes))
+		for k, v := range routes {
+			s.deps.cardRoutes[strings.ToLower(strings.TrimSpace(k))] = v
+		}
+	}
+}
+
+// WithFeeLedgerAccounts maps gateway identifiers to ledger accounts used for fees.
+func WithFeeLedgerAccounts(routes map[string]string) Option {
+	return func(s *Service) {
+		if len(routes) == 0 {
+			return
+		}
+		s.deps.feeLedgerAccounts = make(map[string]string, len(routes))
+		for k, v := range routes {
+			key := strings.ToLower(strings.TrimSpace(k))
+			val := strings.TrimSpace(v)
+			if key == "" || val == "" {
+				continue
+			}
+			s.deps.feeLedgerAccounts[key] = val
+		}
 	}
 }
 

api/payments/orchestrator/internal/service/orchestrator/payment_executor.go

@@ -3,215 +3,30 @@ package orchestrator
 import (
 	"context"
 	"strings"
-	"time"
 
-	oracleclient "github.com/tech/sendico/fx/oracle/client"
 	"github.com/tech/sendico/payments/orchestrator/storage"
 	"github.com/tech/sendico/payments/orchestrator/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
-	feesv1 "github.com/tech/sendico/pkg/proto/billing/fees/v1"
+	"github.com/tech/sendico/pkg/mlogger"
 	fxv1 "github.com/tech/sendico/pkg/proto/common/fx/v1"
-	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
 	ledgerv1 "github.com/tech/sendico/pkg/proto/ledger/v1"
-	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
 	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 	"go.uber.org/zap"
-	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
-func (s *Service) buildPaymentQuote(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest) (*orchestratorv1.PaymentQuote, time.Time, error) {
+type paymentExecutor struct {
-	intent := req.GetIntent()
+	deps   *serviceDependencies
-	amount := intent.GetAmount()
+	logger mlogger.Logger
-	fxSide := fxv1.Side_SIDE_UNSPECIFIED
+	svc    *Service
-	if intent.GetFx() != nil {
-		fxSide = intent.GetFx().GetSide()
-	}
-
-	var fxQuote *oraclev1.Quote
-	var err error
-	if shouldRequestFX(intent) {
-		fxQuote, err = s.requestFXQuote(ctx, orgRef, req)
-		if err != nil {
-			return nil, time.Time{}, err
-		}
-	}
-
-	payAmount, settlementAmountBeforeFees := resolveTradeAmounts(amount, fxQuote, fxSide)
-
-	feeBaseAmount := payAmount
-	if feeBaseAmount == nil {
-		feeBaseAmount = cloneMoney(amount)
-	}
-
-	feeQuote, err := s.quoteFees(ctx, orgRef, req, feeBaseAmount)
-	if err != nil {
-		return nil, time.Time{}, err
-	}
-	feeCurrency := ""
-	if feeBaseAmount != nil {
-		feeCurrency = feeBaseAmount.GetCurrency()
-	} else if amount != nil {
-		feeCurrency = amount.GetCurrency()
-	}
-	feeTotal := extractFeeTotal(feeQuote.GetLines(), feeCurrency)
-
-	var networkFee *chainv1.EstimateTransferFeeResponse
-	if shouldEstimateNetworkFee(intent) {
-		networkFee, err = s.estimateNetworkFee(ctx, intent)
-		if err != nil {
-			return nil, time.Time{}, err
-		}
-	}
-
-	debitAmount, settlementAmount := computeAggregates(payAmount, settlementAmountBeforeFees, feeTotal, networkFee, fxQuote)
-
-	quote := &orchestratorv1.PaymentQuote{
-		DebitAmount:              debitAmount,
-		ExpectedSettlementAmount: settlementAmount,
-		ExpectedFeeTotal:         feeTotal,
-		FeeLines:                 cloneFeeLines(feeQuote.GetLines()),
-		FeeRules:                 cloneFeeRules(feeQuote.GetApplied()),
-		FxQuote:                  fxQuote,
-		NetworkFee:               networkFee,
-		FeeQuoteToken:            feeQuote.GetFeeQuoteToken(),
-	}
-
-	expiresAt := quoteExpiry(s.clock.Now(), feeQuote, fxQuote)
-
-	return quote, expiresAt, nil
 }
 
-func (s *Service) quoteFees(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest, baseAmount *moneyv1.Money) (*feesv1.PrecomputeFeesResponse, error) {
+func newPaymentExecutor(deps *serviceDependencies, logger mlogger.Logger, svc *Service) *paymentExecutor {
-	if !s.fees.available() {
+	return &paymentExecutor{deps: deps, logger: logger, svc: svc}
-		return &feesv1.PrecomputeFeesResponse{}, nil
-	}
-	intent := req.GetIntent()
-	amount := cloneMoney(baseAmount)
-	if amount == nil {
-		amount = cloneMoney(intent.GetAmount())
-	}
-	feeIntent := &feesv1.Intent{
-		Trigger:    triggerFromKind(intent.GetKind(), intent.GetRequiresFx()),
-		BaseAmount: amount,
-		BookedAt:   timestamppb.New(s.clock.Now()),
-		OriginType: "payments.orchestrator.quote",
-		OriginRef:  strings.TrimSpace(req.GetIdempotencyKey()),
-		Attributes: cloneMetadata(intent.GetAttributes()),
-	}
-	timeout := req.GetMeta().GetTrace()
-	ctxTimeout, cancel := s.withTimeout(ctx, s.fees.timeout)
-	defer cancel()
-	resp, err := s.fees.client.PrecomputeFees(ctxTimeout, &feesv1.PrecomputeFeesRequest{
-		Meta: &feesv1.RequestMeta{
-			OrganizationRef: orgRef,
-			Trace:           timeout,
-		},
-		Intent: feeIntent,
-		TtlMs:  defaultFeeQuoteTTLMillis,
-	})
-	if err != nil {
-		s.logger.Error("fees precompute failed", zap.Error(err))
-		return nil, merrors.Internal("fees_precompute_failed")
-	}
-	return resp, nil
 }
 
-func (s *Service) estimateNetworkFee(ctx context.Context, intent *orchestratorv1.PaymentIntent) (*chainv1.EstimateTransferFeeResponse, error) {
+func (p *paymentExecutor) executePayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment, quote *orchestratorv1.PaymentQuote) error {
-	if !s.gateway.available() {
-		return nil, nil
-	}
-
-	req := &chainv1.EstimateTransferFeeRequest{
-		Amount: cloneMoney(intent.GetAmount()),
-	}
-	if src := intent.GetSource().GetManagedWallet(); src != nil {
-		req.SourceWalletRef = strings.TrimSpace(src.GetManagedWalletRef())
-	}
-	if dst := intent.GetDestination().GetManagedWallet(); dst != nil {
-		req.Destination = &chainv1.TransferDestination{
-			Destination: &chainv1.TransferDestination_ManagedWalletRef{ManagedWalletRef: strings.TrimSpace(dst.GetManagedWalletRef())},
-		}
-	}
-	if dst := intent.GetDestination().GetExternalChain(); dst != nil {
-		req.Destination = &chainv1.TransferDestination{
-			Destination: &chainv1.TransferDestination_ExternalAddress{ExternalAddress: strings.TrimSpace(dst.GetAddress())},
-			Memo:        strings.TrimSpace(dst.GetMemo()),
-		}
-		req.Asset = dst.GetAsset()
-	}
-	if req.Asset == nil {
-		if src := intent.GetSource().GetManagedWallet(); src != nil {
-			req.Asset = src.GetAsset()
-		}
-	}
-
-	resp, err := s.gateway.client.EstimateTransferFee(ctx, req)
-	if err != nil {
-		s.logger.Error("chain gateway fee estimation failed", zap.Error(err))
-		return nil, merrors.Internal("chain_gateway_fee_estimation_failed")
-	}
-	return resp, nil
-}
-
-func (s *Service) requestFXQuote(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest) (*oraclev1.Quote, error) {
-	if !s.oracle.available() {
-		return nil, nil
-	}
-	intent := req.GetIntent()
-	meta := req.GetMeta()
-	fxIntent := intent.GetFx()
-	if fxIntent == nil {
-		return nil, nil
-	}
-
-	ttl := fxIntent.GetTtlMs()
-	if ttl <= 0 {
-		ttl = defaultOracleTTLMillis
-	}
-
-	params := oracleclient.GetQuoteParams{
-		Meta: oracleclient.RequestMeta{
-			OrganizationRef: orgRef,
-			Trace:           meta.GetTrace(),
-		},
-		Pair:              fxIntent.GetPair(),
-		Side:              fxIntent.GetSide(),
-		Firm:              fxIntent.GetFirm(),
-		TTL:               time.Duration(ttl) * time.Millisecond,
-		PreferredProvider: strings.TrimSpace(fxIntent.GetPreferredProvider()),
-	}
-
-	if fxIntent.GetMaxAgeMs() > 0 {
-		params.MaxAge = time.Duration(fxIntent.GetMaxAgeMs()) * time.Millisecond
-	}
-
-	if amount := intent.GetAmount(); amount != nil {
-		pair := fxIntent.GetPair()
-		if pair != nil {
-			switch {
-			case strings.EqualFold(amount.GetCurrency(), pair.GetBase()):
-				params.BaseAmount = cloneMoney(amount)
-			case strings.EqualFold(amount.GetCurrency(), pair.GetQuote()):
-				params.QuoteAmount = cloneMoney(amount)
-			default:
-				params.BaseAmount = cloneMoney(amount)
-			}
-		} else {
-			params.BaseAmount = cloneMoney(amount)
-		}
-	}
-
-	quote, err := s.oracle.client.GetQuote(ctx, params)
-	if err != nil {
-		s.logger.Error("fx oracle quote failed", zap.Error(err))
-		return nil, merrors.Internal("fx_quote_failed")
-	}
-	return quoteToProto(quote), nil
-}
-
-func (s *Service) executePayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment, quote *orchestratorv1.PaymentQuote) error {
 	if store == nil {
 		return errStorageUnavailable
 	}
@@ -219,6 +34,7 @@ func (s *Service) executePayment(ctx context.Context, store storage.PaymentsStor
 	charges := ledgerChargesFromFeeLines(quote.GetFeeLines())
 	ledgerNeeded := requiresLedger(payment)
 	chainNeeded := requiresChain(payment)
+	cardNeeded := payment.Intent.Destination.Type == model.EndpointTypeCard
 
 	exec := payment.Execution
 	if exec == nil {
@@ -226,25 +42,26 @@ func (s *Service) executePayment(ctx context.Context, store storage.PaymentsStor
 	}
 
 	if ledgerNeeded {
-		if !s.ledger.available() {
+		if !p.deps.ledger.available() {
-			return s.failPayment(ctx, store, payment, model.PaymentFailureCodeLedger, "ledger_client_unavailable", merrors.Internal("ledger_client_unavailable"))
+			return p.failPayment(ctx, store, payment, model.PaymentFailureCodeLedger, "ledger_client_unavailable", merrors.Internal("ledger_client_unavailable"))
 		}
-		if err := s.performLedgerOperation(ctx, payment, quote, charges); err != nil {
+		if err := p.performLedgerOperation(ctx, payment, quote, charges); err != nil {
-			return s.failPayment(ctx, store, payment, model.PaymentFailureCodeLedger, strings.TrimSpace(err.Error()), err)
+			return p.failPayment(ctx, store, payment, model.PaymentFailureCodeLedger, strings.TrimSpace(err.Error()), err)
 		}
 		payment.State = model.PaymentStateFundsReserved
-		if err := s.persistPayment(ctx, store, payment); err != nil {
+		if err := p.persistPayment(ctx, store, payment); err != nil {
 			return err
 		}
+		p.logger.Info("ledger reservation completed", zap.String("payment_ref", payment.PaymentRef))
 	}
 
 	if chainNeeded {
-		if !s.gateway.available() {
+		if !p.deps.gateway.available() {
-			return s.failPayment(ctx, store, payment, model.PaymentFailureCodeChain, "chain_client_unavailable", merrors.Internal("chain_client_unavailable"))
+			return p.failPayment(ctx, store, payment, model.PaymentFailureCodeChain, "chain_client_unavailable", merrors.Internal("chain_client_unavailable"))
 		}
-		resp, err := s.submitChainTransfer(ctx, payment, quote)
+		resp, err := p.submitChainTransfer(ctx, payment, quote)
 		if err != nil {
-			return s.failPayment(ctx, store, payment, model.PaymentFailureCodeChain, strings.TrimSpace(err.Error()), err)
+			return p.failPayment(ctx, store, payment, model.PaymentFailureCodeChain, strings.TrimSpace(err.Error()), err)
 		}
 		exec = payment.Execution
 		if exec == nil {
@@ -255,17 +72,42 @@ func (s *Service) executePayment(ctx context.Context, store storage.PaymentsStor
 		}
 		payment.Execution = exec
 		payment.State = model.PaymentStateSubmitted
-		if err := s.persistPayment(ctx, store, payment); err != nil {
+		if err := p.persistPayment(ctx, store, payment); err != nil {
 			return err
 		}
+		p.logger.Info("chain transfer submitted", zap.String("payment_ref", payment.PaymentRef), zap.String("transfer_ref", exec.ChainTransferRef))
+		if !cardNeeded {
+			return nil
+		}
+	}
+
+	if cardNeeded {
+		if !p.deps.mntx.available() {
+			return p.failPayment(ctx, store, payment, model.PaymentFailureCodePolicy, "card_gateway_unavailable", merrors.Internal("card_gateway_unavailable"))
+		}
+		if err := p.svc.submitCardFundingTransfers(ctx, payment, quote); err != nil {
+			return p.failPayment(ctx, store, payment, model.PaymentFailureCodeChain, strings.TrimSpace(err.Error()), err)
+		}
+		if err := p.svc.submitCardPayout(ctx, payment); err != nil {
+			return p.failPayment(ctx, store, payment, model.PaymentFailureCodePolicy, strings.TrimSpace(err.Error()), err)
+		}
+		payment.State = model.PaymentStateSubmitted
+		if err := p.persistPayment(ctx, store, payment); err != nil {
+			return err
+		}
+		p.logger.Info("card payout submitted", zap.String("payment_ref", payment.PaymentRef), zap.String("card_payout_ref", payment.Execution.CardPayoutRef))
 		return nil
 	}
 
 	payment.State = model.PaymentStateSettled
-	return s.persistPayment(ctx, store, payment)
+	if err := p.persistPayment(ctx, store, payment); err != nil {
+		return err
+	}
+	p.logger.Info("payment settled without chain", zap.String("payment_ref", payment.PaymentRef))
+	return nil
 }
 
-func (s *Service) performLedgerOperation(ctx context.Context, payment *model.Payment, quote *orchestratorv1.PaymentQuote, charges []*ledgerv1.PostingLine) error {
+func (p *paymentExecutor) performLedgerOperation(ctx context.Context, payment *model.Payment, quote *orchestratorv1.PaymentQuote, charges []*ledgerv1.PostingLine) error {
 	intent := payment.Intent
 	if payment.OrganizationRef == primitive.NilObjectID {
 		return merrors.InvalidArgument("ledger: organization_ref is required")
@@ -285,7 +127,7 @@ func (s *Service) performLedgerOperation(ctx context.Context, payment *model.Pay
 
 	switch intent.Kind {
 	case model.PaymentKindFXConversion:
-		if err := s.applyFX(ctx, payment, quote, charges, description, metadata, exec); err != nil {
+		if err := p.applyFX(ctx, payment, quote, charges, description, metadata, exec); err != nil {
 			return err
 		}
 	case model.PaymentKindInternalTransfer, model.PaymentKindPayout, model.PaymentKindUnspecified:
@@ -303,7 +145,7 @@ func (s *Service) performLedgerOperation(ctx context.Context, payment *model.Pay
 			Charges:              charges,
 			Metadata:             metadata,
 		}
-		resp, err := s.ledger.client.TransferInternal(ctx, req)
+		resp, err := p.deps.ledger.client.TransferInternal(ctx, req)
 		if err != nil {
 			return err
 		}
@@ -316,7 +158,7 @@ func (s *Service) performLedgerOperation(ctx context.Context, payment *model.Pay
 	return nil
 }
 
-func (s *Service) applyFX(ctx context.Context, payment *model.Payment, quote *orchestratorv1.PaymentQuote, charges []*ledgerv1.PostingLine, description string, metadata map[string]string, exec *model.ExecutionRefs) error {
+func (p *paymentExecutor) applyFX(ctx context.Context, payment *model.Payment, quote *orchestratorv1.PaymentQuote, charges []*ledgerv1.PostingLine, description string, metadata map[string]string, exec *model.ExecutionRefs) error {
 	intent := payment.Intent
 	source := intent.Source.Ledger
 	destination := intent.Destination.Ledger
@@ -354,7 +196,7 @@ func (s *Service) applyFX(ctx context.Context, payment *model.Payment, quote *or
 		Charges:              charges,
 		Metadata:             metadata,
 	}
-	resp, err := s.ledger.client.ApplyFXWithCharges(ctx, req)
+	resp, err := p.deps.ledger.client.ApplyFXWithCharges(ctx, req)
 	if err != nil {
 		return err
 	}
@@ -363,7 +205,7 @@ func (s *Service) applyFX(ctx context.Context, payment *model.Payment, quote *or
 	return nil
 }
 
-func (s *Service) submitChainTransfer(ctx context.Context, payment *model.Payment, quote *orchestratorv1.PaymentQuote) (*chainv1.SubmitTransferResponse, error) {
+func (p *paymentExecutor) submitChainTransfer(ctx context.Context, payment *model.Payment, quote *orchestratorv1.PaymentQuote) (*chainv1.SubmitTransferResponse, error) {
 	intent := payment.Intent
 	source := intent.Source.ManagedWallet
 	destination := intent.Destination
@@ -389,23 +231,23 @@ func (s *Service) submitChainTransfer(ctx context.Context, payment *model.Paymen
 		Metadata:        cloneMetadata(payment.Metadata),
 		ClientReference: payment.PaymentRef,
 	}
-	return s.gateway.client.SubmitTransfer(ctx, req)
+	return p.deps.gateway.client.SubmitTransfer(ctx, req)
 }
 
-func (s *Service) persistPayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment) error {
+func (p *paymentExecutor) persistPayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment) error {
 	if store == nil {
 		return errStorageUnavailable
 	}
 	return store.Update(ctx, payment)
 }
 
-func (s *Service) failPayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment, code model.PaymentFailureCode, reason string, err error) error {
+func (p *paymentExecutor) failPayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment, code model.PaymentFailureCode, reason string, err error) error {
 	payment.State = model.PaymentStateFailed
 	payment.FailureCode = code
 	payment.FailureReason = strings.TrimSpace(reason)
 	if store != nil {
 		if updateErr := store.Update(ctx, payment); updateErr != nil {
-			s.logger.Error("failed to persist payment failure", zap.Error(updateErr), zap.String("payment_ref", payment.PaymentRef))
+			p.logger.Error("failed to persist payment failure", zap.Error(updateErr), zap.String("payment_ref", payment.PaymentRef))
 		}
 	}
 	if err != nil {
@@ -414,6 +256,21 @@ func (s *Service) failPayment(ctx context.Context, store storage.PaymentsStore,
 	return merrors.Internal(reason)
 }
 
+func paymentDescription(payment *model.Payment) string {
+	if payment == nil {
+		return ""
+	}
+	if val := strings.TrimSpace(payment.Intent.Attributes["description"]); val != "" {
+		return val
+	}
+	if payment.Metadata != nil {
+		if val := strings.TrimSpace(payment.Metadata["description"]); val != "" {
+			return val
+		}
+	}
+	return payment.PaymentRef
+}
+
 func resolveLedgerAccounts(intent model.PaymentIntent) (string, string, error) {
 	source := intent.Source.Ledger
 	destination := intent.Destination.Ledger
@@ -432,21 +289,6 @@ func resolveLedgerAccounts(intent model.PaymentIntent) (string, string, error) {
 	return strings.TrimSpace(source.LedgerAccountRef), to, nil
 }
 
-func paymentDescription(payment *model.Payment) string {
-	if payment == nil {
-		return ""
-	}
-	if val := strings.TrimSpace(payment.Intent.Attributes["description"]); val != "" {
-		return val
-	}
-	if payment.Metadata != nil {
-		if val := strings.TrimSpace(payment.Metadata["description"]); val != "" {
-			return val
-		}
-	}
-	return payment.PaymentRef
-}
-
 func requiresLedger(payment *model.Payment) bool {
 	if payment == nil {
 		return false

api/payments/orchestrator/internal/service/orchestrator/quote_batch.go

@@ -0,0 +1,145 @@
+package orchestrator
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/shopspring/decimal"
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+)
+
+func perIntentIdempotencyKey(base string, index int, total int) string {
+	base = strings.TrimSpace(base)
+	if base == "" {
+		return ""
+	}
+	if total <= 1 {
+		return base
+	}
+	return fmt.Sprintf("%s:%d", base, index+1)
+}
+
+func minQuoteExpiry(expires []time.Time) (time.Time, bool) {
+	var min time.Time
+	for _, exp := range expires {
+		if exp.IsZero() {
+			continue
+		}
+		if min.IsZero() || exp.Before(min) {
+			min = exp
+		}
+	}
+	if min.IsZero() {
+		return time.Time{}, false
+	}
+	return min, true
+}
+
+func aggregatePaymentQuotes(quotes []*orchestratorv1.PaymentQuote) (*orchestratorv1.PaymentQuoteAggregate, error) {
+	if len(quotes) == 0 {
+		return nil, nil
+	}
+	debitTotals := map[string]decimal.Decimal{}
+	settlementTotals := map[string]decimal.Decimal{}
+	feeTotals := map[string]decimal.Decimal{}
+	networkTotals := map[string]decimal.Decimal{}
+
+	for _, quote := range quotes {
+		if quote == nil {
+			continue
+		}
+		if err := accumulateMoney(debitTotals, quote.GetDebitAmount()); err != nil {
+			return nil, err
+		}
+		if err := accumulateMoney(settlementTotals, quote.GetExpectedSettlementAmount()); err != nil {
+			return nil, err
+		}
+		if err := accumulateMoney(feeTotals, quote.GetExpectedFeeTotal()); err != nil {
+			return nil, err
+		}
+		if nf := quote.GetNetworkFee(); nf != nil {
+			if err := accumulateMoney(networkTotals, nf.GetNetworkFee()); err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	return &orchestratorv1.PaymentQuoteAggregate{
+		DebitAmounts:              totalsToMoney(debitTotals),
+		ExpectedSettlementAmounts: totalsToMoney(settlementTotals),
+		ExpectedFeeTotals:         totalsToMoney(feeTotals),
+		NetworkFeeTotals:          totalsToMoney(networkTotals),
+	}, nil
+}
+
+func accumulateMoney(totals map[string]decimal.Decimal, money *moneyv1.Money) error {
+	if money == nil {
+		return nil
+	}
+	currency := strings.TrimSpace(money.GetCurrency())
+	if currency == "" {
+		return nil
+	}
+	amount, err := decimal.NewFromString(money.GetAmount())
+	if err != nil {
+		return err
+	}
+	if current, ok := totals[currency]; ok {
+		totals[currency] = current.Add(amount)
+		return nil
+	}
+	totals[currency] = amount
+	return nil
+}
+
+func totalsToMoney(totals map[string]decimal.Decimal) []*moneyv1.Money {
+	if len(totals) == 0 {
+		return nil
+	}
+	currencies := make([]string, 0, len(totals))
+	for currency := range totals {
+		currencies = append(currencies, currency)
+	}
+	sort.Strings(currencies)
+
+	result := make([]*moneyv1.Money, 0, len(currencies))
+	for _, currency := range currencies {
+		amount := totals[currency]
+		result = append(result, &moneyv1.Money{
+			Amount:   amount.String(),
+			Currency: currency,
+		})
+	}
+	return result
+}
+
+func intentsFromProto(intents []*orchestratorv1.PaymentIntent) []model.PaymentIntent {
+	if len(intents) == 0 {
+		return nil
+	}
+	result := make([]model.PaymentIntent, 0, len(intents))
+	for _, intent := range intents {
+		result = append(result, intentFromProto(intent))
+	}
+	return result
+}
+
+func quoteSnapshotsFromProto(quotes []*orchestratorv1.PaymentQuote) []*model.PaymentQuoteSnapshot {
+	if len(quotes) == 0 {
+		return nil
+	}
+	result := make([]*model.PaymentQuoteSnapshot, 0, len(quotes))
+	for _, quote := range quotes {
+		if quote == nil {
+			continue
+		}
+		if snapshot := quoteSnapshotToModel(quote); snapshot != nil {
+			result = append(result, snapshot)
+		}
+	}
+	return result
+}

api/payments/orchestrator/internal/service/orchestrator/quote_batch_test.go

@@ -0,0 +1,102 @@
+package orchestrator
+
+import (
+	"testing"
+	"time"
+
+	"github.com/shopspring/decimal"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+)
+
+func TestAggregatePaymentQuotes(t *testing.T) {
+	quotes := []*orchestratorv1.PaymentQuote{
+		{
+			DebitAmount:              &moneyv1.Money{Amount: "10", Currency: "USD"},
+			ExpectedSettlementAmount: &moneyv1.Money{Amount: "8", Currency: "EUR"},
+			ExpectedFeeTotal:         &moneyv1.Money{Amount: "1", Currency: "USD"},
+			NetworkFee: &chainv1.EstimateTransferFeeResponse{
+				NetworkFee: &moneyv1.Money{Amount: "0.5", Currency: "USD"},
+			},
+		},
+		{
+			DebitAmount:              &moneyv1.Money{Amount: "5", Currency: "USD"},
+			ExpectedSettlementAmount: &moneyv1.Money{Amount: "1000", Currency: "NGN"},
+			ExpectedFeeTotal:         &moneyv1.Money{Amount: "2", Currency: "USD"},
+			NetworkFee: &chainv1.EstimateTransferFeeResponse{
+				NetworkFee: &moneyv1.Money{Amount: "100", Currency: "NGN"},
+			},
+		},
+	}
+
+	agg, err := aggregatePaymentQuotes(quotes)
+	if err != nil {
+		t.Fatalf("aggregatePaymentQuotes returned error: %v", err)
+	}
+
+	assertMoneyTotals(t, agg.GetDebitAmounts(), map[string]string{"USD": "15"})
+	assertMoneyTotals(t, agg.GetExpectedSettlementAmounts(), map[string]string{"EUR": "8", "NGN": "1000"})
+	assertMoneyTotals(t, agg.GetExpectedFeeTotals(), map[string]string{"USD": "3"})
+	assertMoneyTotals(t, agg.GetNetworkFeeTotals(), map[string]string{"USD": "0.5", "NGN": "100"})
+}
+
+func TestAggregatePaymentQuotesInvalidAmount(t *testing.T) {
+	quotes := []*orchestratorv1.PaymentQuote{
+		{
+			DebitAmount: &moneyv1.Money{Amount: "bad", Currency: "USD"},
+		},
+	}
+	if _, err := aggregatePaymentQuotes(quotes); err == nil {
+		t.Fatal("expected error for invalid amount")
+	}
+}
+
+func TestMinQuoteExpiry(t *testing.T) {
+	now := time.Now().UTC()
+	later := now.Add(10 * time.Minute)
+	earliest := now.Add(5 * time.Minute)
+
+	min, ok := minQuoteExpiry([]time.Time{later, {}, earliest})
+	if !ok {
+		t.Fatal("expected min expiry to be set")
+	}
+	if !min.Equal(earliest) {
+		t.Fatalf("expected min expiry %v, got %v", earliest, min)
+	}
+
+	if _, ok := minQuoteExpiry([]time.Time{{}}); ok {
+		t.Fatal("expected min expiry to be unset")
+	}
+}
+
+func assertMoneyTotals(t *testing.T, list []*moneyv1.Money, expected map[string]string) {
+	t.Helper()
+	got := make(map[string]decimal.Decimal, len(list))
+	for _, item := range list {
+		if item == nil {
+			continue
+		}
+		val, err := decimal.NewFromString(item.GetAmount())
+		if err != nil {
+			t.Fatalf("invalid money amount %q: %v", item.GetAmount(), err)
+		}
+		got[item.GetCurrency()] = val
+	}
+	if len(got) != len(expected) {
+		t.Fatalf("expected %d totals, got %d", len(expected), len(got))
+	}
+	for currency, amount := range expected {
+		val, err := decimal.NewFromString(amount)
+		if err != nil {
+			t.Fatalf("invalid expected amount %q: %v", amount, err)
+		}
+		gotVal, ok := got[currency]
+		if !ok {
+			t.Fatalf("missing currency %s", currency)
+		}
+		if !gotVal.Equal(val) {
+			t.Fatalf("expected %s %s, got %s", amount, currency, gotVal.String())
+		}
+	}
+}

api/payments/orchestrator/internal/service/orchestrator/quote_engine.go

@@ -0,0 +1,261 @@
+package orchestrator
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	oracleclient "github.com/tech/sendico/fx/oracle/client"
+	"github.com/tech/sendico/pkg/merrors"
+	feesv1 "github.com/tech/sendico/pkg/proto/billing/fees/v1"
+	fxv1 "github.com/tech/sendico/pkg/proto/common/fx/v1"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
+	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+	"go.uber.org/zap"
+	"google.golang.org/protobuf/types/known/timestamppb"
+)
+
+func (s *Service) buildPaymentQuote(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest) (*orchestratorv1.PaymentQuote, time.Time, error) {
+	intent := req.GetIntent()
+	amount := intent.GetAmount()
+	fxSide := fxv1.Side_SIDE_UNSPECIFIED
+	if intent.GetFx() != nil {
+		fxSide = intent.GetFx().GetSide()
+	}
+
+	var fxQuote *oraclev1.Quote
+	var err error
+	if shouldRequestFX(intent) {
+		fxQuote, err = s.requestFXQuote(ctx, orgRef, req)
+		if err != nil {
+			return nil, time.Time{}, err
+		}
+		s.logger.Debug("fx quote attached to payment quote", zap.String("org_ref", orgRef))
+	}
+
+	payAmount, settlementAmountBeforeFees := resolveTradeAmounts(amount, fxQuote, fxSide)
+
+	feeBaseAmount := payAmount
+	if feeBaseAmount == nil {
+		feeBaseAmount = cloneMoney(amount)
+	}
+
+	feeQuote, err := s.quoteFees(ctx, orgRef, req, feeBaseAmount)
+	if err != nil {
+		return nil, time.Time{}, err
+	}
+	feeCurrency := ""
+	if feeBaseAmount != nil {
+		feeCurrency = feeBaseAmount.GetCurrency()
+	} else if amount != nil {
+		feeCurrency = amount.GetCurrency()
+	}
+	feeLines := cloneFeeLines(feeQuote.GetLines())
+	s.assignFeeLedgerAccounts(intent, feeLines)
+	feeTotal := extractFeeTotal(feeLines, feeCurrency)
+
+	var networkFee *chainv1.EstimateTransferFeeResponse
+	if shouldEstimateNetworkFee(intent) {
+		networkFee, err = s.estimateNetworkFee(ctx, intent)
+		if err != nil {
+			return nil, time.Time{}, err
+		}
+		s.logger.Debug("network fee estimated", zap.String("org_ref", orgRef))
+	}
+
+	debitAmount, settlementAmount := computeAggregates(payAmount, settlementAmountBeforeFees, feeTotal, networkFee, fxQuote, intent.GetSettlementMode())
+
+	quote := &orchestratorv1.PaymentQuote{
+		DebitAmount:              debitAmount,
+		ExpectedSettlementAmount: settlementAmount,
+		ExpectedFeeTotal:         feeTotal,
+		FeeLines:                 feeLines,
+		FeeRules:                 cloneFeeRules(feeQuote.GetApplied()),
+		FxQuote:                  fxQuote,
+		NetworkFee:               networkFee,
+	}
+
+	expiresAt := quoteExpiry(s.clock.Now(), feeQuote, fxQuote)
+
+	return quote, expiresAt, nil
+}
+
+func (s *Service) quoteFees(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest, baseAmount *moneyv1.Money) (*feesv1.PrecomputeFeesResponse, error) {
+	if !s.deps.fees.available() {
+		return &feesv1.PrecomputeFeesResponse{}, nil
+	}
+	intent := req.GetIntent()
+	amount := cloneMoney(baseAmount)
+	if amount == nil {
+		amount = cloneMoney(intent.GetAmount())
+	}
+	feeIntent := &feesv1.Intent{
+		Trigger:    triggerFromKind(intent.GetKind(), intent.GetRequiresFx()),
+		BaseAmount: amount,
+		BookedAt:   timestamppb.New(s.clock.Now()),
+		OriginType: "payments.orchestrator.quote",
+		OriginRef:  strings.TrimSpace(req.GetIdempotencyKey()),
+		Attributes: cloneMetadata(intent.GetAttributes()),
+	}
+	timeout := req.GetMeta().GetTrace()
+	ctxTimeout, cancel := s.withTimeout(ctx, s.deps.fees.timeout)
+	defer cancel()
+	resp, err := s.deps.fees.client.PrecomputeFees(ctxTimeout, &feesv1.PrecomputeFeesRequest{
+		Meta: &feesv1.RequestMeta{
+			OrganizationRef: orgRef,
+			Trace:           timeout,
+		},
+		Intent: feeIntent,
+		TtlMs:  defaultFeeQuoteTTLMillis,
+	})
+	if err != nil {
+		s.logger.Warn("fees precompute failed", zap.Error(err))
+		return nil, merrors.Internal("fees_precompute_failed")
+	}
+	return resp, nil
+}
+
+func (s *Service) estimateNetworkFee(ctx context.Context, intent *orchestratorv1.PaymentIntent) (*chainv1.EstimateTransferFeeResponse, error) {
+	if !s.deps.gateway.available() {
+		return nil, nil
+	}
+
+	req := &chainv1.EstimateTransferFeeRequest{
+		Amount: cloneMoney(intent.GetAmount()),
+	}
+	if src := intent.GetSource().GetManagedWallet(); src != nil {
+		req.SourceWalletRef = strings.TrimSpace(src.GetManagedWalletRef())
+	}
+	if dst := intent.GetDestination().GetManagedWallet(); dst != nil {
+		req.Destination = &chainv1.TransferDestination{
+			Destination: &chainv1.TransferDestination_ManagedWalletRef{ManagedWalletRef: strings.TrimSpace(dst.GetManagedWalletRef())},
+		}
+	}
+	if dst := intent.GetDestination().GetExternalChain(); dst != nil {
+		req.Destination = &chainv1.TransferDestination{
+			Destination: &chainv1.TransferDestination_ExternalAddress{ExternalAddress: strings.TrimSpace(dst.GetAddress())},
+			Memo:        strings.TrimSpace(dst.GetMemo()),
+		}
+		req.Asset = dst.GetAsset()
+	}
+	if req.Asset == nil {
+		if src := intent.GetSource().GetManagedWallet(); src != nil {
+			req.Asset = src.GetAsset()
+		}
+	}
+
+	resp, err := s.deps.gateway.client.EstimateTransferFee(ctx, req)
+	if err != nil {
+		s.logger.Warn("chain gateway fee estimation failed", zap.Error(err))
+		return nil, merrors.Internal("chain_gateway_fee_estimation_failed")
+	}
+	return resp, nil
+}
+
+func (s *Service) requestFXQuote(ctx context.Context, orgRef string, req *orchestratorv1.QuotePaymentRequest) (*oraclev1.Quote, error) {
+	if !s.deps.oracle.available() {
+		return nil, nil
+	}
+	intent := req.GetIntent()
+	meta := req.GetMeta()
+	fxIntent := intent.GetFx()
+	if fxIntent == nil {
+		return nil, nil
+	}
+
+	ttl := fxIntent.GetTtlMs()
+	if ttl <= 0 {
+		ttl = defaultOracleTTLMillis
+	}
+
+	params := oracleclient.GetQuoteParams{
+		Meta: oracleclient.RequestMeta{
+			OrganizationRef: orgRef,
+			Trace:           meta.GetTrace(),
+		},
+		Pair:              fxIntent.GetPair(),
+		Side:              fxIntent.GetSide(),
+		Firm:              fxIntent.GetFirm(),
+		TTL:               time.Duration(ttl) * time.Millisecond,
+		PreferredProvider: strings.TrimSpace(fxIntent.GetPreferredProvider()),
+	}
+
+	if fxIntent.GetMaxAgeMs() > 0 {
+		params.MaxAge = time.Duration(fxIntent.GetMaxAgeMs()) * time.Millisecond
+	}
+
+	if amount := intent.GetAmount(); amount != nil {
+		pair := fxIntent.GetPair()
+		if pair != nil {
+			switch {
+			case strings.EqualFold(amount.GetCurrency(), pair.GetBase()):
+				params.BaseAmount = cloneMoney(amount)
+			case strings.EqualFold(amount.GetCurrency(), pair.GetQuote()):
+				params.QuoteAmount = cloneMoney(amount)
+			default:
+				params.BaseAmount = cloneMoney(amount)
+			}
+		} else {
+			params.BaseAmount = cloneMoney(amount)
+		}
+	}
+
+	quote, err := s.deps.oracle.client.GetQuote(ctx, params)
+	if err != nil {
+		s.logger.Warn("fx oracle quote failed", zap.Error(err))
+		return nil, merrors.Internal("fx_quote_failed")
+	}
+	return quoteToProto(quote), nil
+}
+
+func (s *Service) feeLedgerAccountForIntent(intent *orchestratorv1.PaymentIntent) string {
+	if intent == nil || len(s.deps.feeLedgerAccounts) == 0 {
+		return ""
+	}
+
+	key := s.gatewayKeyFromIntent(intent)
+	if key == "" {
+		return ""
+	}
+	return strings.TrimSpace(s.deps.feeLedgerAccounts[key])
+}
+
+func (s *Service) assignFeeLedgerAccounts(intent *orchestratorv1.PaymentIntent, lines []*feesv1.DerivedPostingLine) {
+	account := s.feeLedgerAccountForIntent(intent)
+	key := s.gatewayKeyFromIntent(intent)
+
+	missing := 0
+	for _, line := range lines {
+		if line == nil {
+			continue
+		}
+		if strings.TrimSpace(line.GetLedgerAccountRef()) == "" {
+			missing++
+		}
+	}
+	if missing == 0 {
+		return
+	}
+
+	if account == "" {
+		s.logger.Debug("no fee ledger account mapping found", zap.String("gateway", key), zap.Int("missing_lines", missing))
+		return
+	}
+	assignLedgerAccounts(lines, account)
+	s.logger.Debug("applied fee ledger account mapping", zap.String("gateway", key), zap.String("ledger_account", account), zap.Int("lines", missing))
+}
+
+func (s *Service) gatewayKeyFromIntent(intent *orchestratorv1.PaymentIntent) string {
+	if intent == nil {
+		return ""
+	}
+	key := strings.TrimSpace(intent.GetAttributes()["gateway"])
+	if key == "" {
+		if dest := intent.GetDestination(); dest != nil && dest.GetCard() != nil {
+			key = defaultCardGateway
+		}
+	}
+	return strings.ToLower(key)
+}

api/payments/orchestrator/internal/service/orchestrator/quote_request_test.go

@@ -19,6 +19,7 @@ func TestRequestFXQuoteUsesQuoteAmountWhenCurrencyMatchesQuote(t *testing.T) {
 	svc := &Service{
 		logger: zap.NewNop(),
 		clock:  testClock{now: time.Now()},
+		deps: serviceDependencies{
 			oracle: oracleDependency{
 				client: &oracleclient.Fake{
 					GetQuoteFn: func(ctx context.Context, params oracleclient.GetQuoteParams) (*oracleclient.Quote, error) {
@@ -35,6 +36,7 @@ func TestRequestFXQuoteUsesQuoteAmountWhenCurrencyMatchesQuote(t *testing.T) {
 					},
 				},
 			},
+		},
 	}
 
 	req := &orchestratorv1.QuotePaymentRequest{

api/payments/orchestrator/internal/service/orchestrator/service.go

@@ -2,21 +2,14 @@ package orchestrator
 
 import (
 	"context"
-	"strings"
 
 	"github.com/tech/sendico/payments/orchestrator/storage"
 	"github.com/tech/sendico/payments/orchestrator/storage/model"
 	"github.com/tech/sendico/pkg/api/routers"
-	"github.com/tech/sendico/pkg/api/routers/gsresponse"
 	clockpkg "github.com/tech/sendico/pkg/clock"
-	"github.com/tech/sendico/pkg/merrors"
 	"github.com/tech/sendico/pkg/mlogger"
-	"github.com/tech/sendico/pkg/mservice"
-	paginationv1 "github.com/tech/sendico/pkg/proto/common/pagination/v1"
 	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
-	"go.mongodb.org/mongo-driver/bson/primitive"
 	"google.golang.org/grpc"
-	"google.golang.org/protobuf/proto"
 )
 
 type serviceError string
@@ -40,12 +33,31 @@ type Service struct {
 	storage storage.Repository
 	clock   clockpkg.Clock
 
+	deps serviceDependencies
+	h    handlerSet
+	comp componentSet
+
+	orchestratorv1.UnimplementedPaymentOrchestratorServer
+}
+
+type serviceDependencies struct {
 	fees              feesDependency
 	ledger            ledgerDependency
 	gateway           gatewayDependency
 	oracle            oracleDependency
+	mntx              mntxDependency
+	cardRoutes        map[string]CardGatewayRoute
+	feeLedgerAccounts map[string]string
+}
 
-	orchestratorv1.UnimplementedPaymentOrchestratorServer
+type handlerSet struct {
+	commands *paymentCommandFactory
+	queries  *paymentQueryHandler
+	events   *paymentEventHandler
+}
+
+type componentSet struct {
+	executor *paymentExecutor
 }
 
 // NewService constructs a payment orchestrator service.
@@ -68,9 +80,30 @@ func NewService(logger mlogger.Logger, repo storage.Repository, opts ...Option)
 		svc.clock = clockpkg.NewSystem()
 	}
 
+	engine := defaultPaymentEngine{svc: svc}
+	svc.h.commands = newPaymentCommandFactory(engine, svc.logger)
+	svc.h.queries = newPaymentQueryHandler(svc.storage, svc.ensureRepository, svc.logger.Named("queries"))
+	svc.h.events = newPaymentEventHandler(svc.storage, svc.ensureRepository, svc.logger.Named("events"))
+	svc.comp.executor = newPaymentExecutor(&svc.deps, svc.logger.Named("payment_executor"), svc)
+
 	return svc
 }
 
+func (s *Service) ensureHandlers() {
+	if s.h.commands == nil {
+		s.h.commands = newPaymentCommandFactory(defaultPaymentEngine{svc: s}, s.logger)
+	}
+	if s.h.queries == nil {
+		s.h.queries = newPaymentQueryHandler(s.storage, s.ensureRepository, s.logger.Named("queries"))
+	}
+	if s.h.events == nil {
+		s.h.events = newPaymentEventHandler(s.storage, s.ensureRepository, s.logger.Named("events"))
+	}
+	if s.comp.executor == nil {
+		s.comp.executor = newPaymentExecutor(&s.deps, s.logger.Named("payment_executor"), s)
+	}
+}
+
 // Register attaches the service to the supplied gRPC router.
 func (s *Service) Register(router routers.GRPC) error {
 	return router.Register(func(reg grpc.ServiceRegistrar) {
@@ -80,474 +113,71 @@ func (s *Service) Register(router routers.GRPC) error {
 
 // QuotePayment aggregates downstream quotes.
 func (s *Service) QuotePayment(ctx context.Context, req *orchestratorv1.QuotePaymentRequest) (*orchestratorv1.QuotePaymentResponse, error) {
-	return executeUnary(ctx, s, "QuotePayment", s.quotePaymentHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "QuotePayment", s.h.commands.QuotePayment().Execute, req)
+}
+
+// QuotePayments aggregates downstream quotes for multiple intents.
+func (s *Service) QuotePayments(ctx context.Context, req *orchestratorv1.QuotePaymentsRequest) (*orchestratorv1.QuotePaymentsResponse, error) {
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "QuotePayments", s.h.commands.QuotePayments().Execute, req)
 }
 
 // InitiatePayment captures a payment intent and reserves funds orchestration.
 func (s *Service) InitiatePayment(ctx context.Context, req *orchestratorv1.InitiatePaymentRequest) (*orchestratorv1.InitiatePaymentResponse, error) {
-	return executeUnary(ctx, s, "InitiatePayment", s.initiatePaymentHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "InitiatePayment", s.h.commands.InitiatePayment().Execute, req)
+}
+
+// InitiatePayments executes multiple payments using a stored quote reference.
+func (s *Service) InitiatePayments(ctx context.Context, req *orchestratorv1.InitiatePaymentsRequest) (*orchestratorv1.InitiatePaymentsResponse, error) {
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "InitiatePayments", s.h.commands.InitiatePayments().Execute, req)
 }
 
 // CancelPayment attempts to cancel an in-flight payment.
 func (s *Service) CancelPayment(ctx context.Context, req *orchestratorv1.CancelPaymentRequest) (*orchestratorv1.CancelPaymentResponse, error) {
-	return executeUnary(ctx, s, "CancelPayment", s.cancelPaymentHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "CancelPayment", s.h.commands.CancelPayment().Execute, req)
 }
 
 // GetPayment returns a stored payment record.
 func (s *Service) GetPayment(ctx context.Context, req *orchestratorv1.GetPaymentRequest) (*orchestratorv1.GetPaymentResponse, error) {
-	return executeUnary(ctx, s, "GetPayment", s.getPaymentHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "GetPayment", s.h.queries.getPayment, req)
 }
 
 // ListPayments lists stored payment records.
 func (s *Service) ListPayments(ctx context.Context, req *orchestratorv1.ListPaymentsRequest) (*orchestratorv1.ListPaymentsResponse, error) {
-	return executeUnary(ctx, s, "ListPayments", s.listPaymentsHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "ListPayments", s.h.queries.listPayments, req)
 }
 
 // InitiateConversion orchestrates standalone FX conversions.
 func (s *Service) InitiateConversion(ctx context.Context, req *orchestratorv1.InitiateConversionRequest) (*orchestratorv1.InitiateConversionResponse, error) {
-	return executeUnary(ctx, s, "InitiateConversion", s.initiateConversionHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "InitiateConversion", s.h.commands.InitiateConversion().Execute, req)
 }
 
 // ProcessTransferUpdate reconciles chain events back into payment state.
 func (s *Service) ProcessTransferUpdate(ctx context.Context, req *orchestratorv1.ProcessTransferUpdateRequest) (*orchestratorv1.ProcessTransferUpdateResponse, error) {
-	return executeUnary(ctx, s, "ProcessTransferUpdate", s.processTransferUpdateHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "ProcessTransferUpdate", s.h.events.processTransferUpdate, req)
 }
 
 // ProcessDepositObserved reconciles deposit events to ledger.
 func (s *Service) ProcessDepositObserved(ctx context.Context, req *orchestratorv1.ProcessDepositObservedRequest) (*orchestratorv1.ProcessDepositObservedResponse, error) {
-	return executeUnary(ctx, s, "ProcessDepositObserved", s.processDepositObservedHandler, req)
+	s.ensureHandlers()
+	return executeUnary(ctx, s, "ProcessDepositObserved", s.h.events.processDepositObserved, req)
 }
 
-func (s *Service) quotePaymentHandler(ctx context.Context, req *orchestratorv1.QuotePaymentRequest) gsresponse.Responder[orchestratorv1.QuotePaymentResponse] {
+// ProcessCardPayoutUpdate reconciles card payout events back into payment state.
-	if err := s.ensureRepository(ctx); err != nil {
+func (s *Service) ProcessCardPayoutUpdate(ctx context.Context, req *orchestratorv1.ProcessCardPayoutUpdateRequest) (*orchestratorv1.ProcessCardPayoutUpdateResponse, error) {
-		return gsresponse.Unavailable[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
+	s.ensureHandlers()
-	}
+	return executeUnary(ctx, s, "ProcessCardPayoutUpdate", s.h.events.processCardPayoutUpdate, req)
-	if req == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
-	}
-	meta := req.GetMeta()
-	if meta == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("meta is required"))
-	}
-	orgRef := strings.TrimSpace(meta.GetOrganizationRef())
-	if orgRef == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("organization_ref is required"))
-	}
-	orgObjectID, parseErr := primitive.ObjectIDFromHex(orgRef)
-	if parseErr != nil {
-		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("organization_ref must be a valid objectID"))
-	}
-	intent := req.GetIntent()
-	if intent == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("intent is required"))
-	}
-	if intent.GetAmount() == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("intent.amount is required"))
-	}
-
-	quote, expiresAt, err := s.buildPaymentQuote(ctx, orgRef, req)
-	if err != nil {
-		return gsresponse.Auto[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	if !req.GetPreviewOnly() {
-		quotesStore := s.storage.Quotes()
-		if quotesStore == nil {
-			return gsresponse.Unavailable[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-		}
-		quoteRef := primitive.NewObjectID().Hex()
-		quote.QuoteRef = quoteRef
-		record := &model.PaymentQuoteRecord{
-			QuoteRef:  quoteRef,
-			Intent:    intentFromProto(intent),
-			Quote:     quoteSnapshotToModel(quote),
-			ExpiresAt: expiresAt,
-		}
-		record.SetID(primitive.NewObjectID())
-		record.SetOrganizationRef(orgObjectID)
-		if err := quotesStore.Create(ctx, record); err != nil {
-			return gsresponse.Auto[orchestratorv1.QuotePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-		}
-	}
-
-	return gsresponse.Success(&orchestratorv1.QuotePaymentResponse{Quote: quote})
 }
 
-func (s *Service) initiatePaymentHandler(ctx context.Context, req *orchestratorv1.InitiatePaymentRequest) gsresponse.Responder[orchestratorv1.InitiatePaymentResponse] {
+func (s *Service) executePayment(ctx context.Context, store storage.PaymentsStore, payment *model.Payment, quote *orchestratorv1.PaymentQuote) error {
-	if err := s.ensureRepository(ctx); err != nil {
+	s.ensureHandlers()
-		return gsresponse.Unavailable[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
+	return s.comp.executor.executePayment(ctx, store, payment, quote)
-	}
-	if req == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
-	}
-	meta := req.GetMeta()
-	if meta == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("meta is required"))
-	}
-	orgRef := strings.TrimSpace(meta.GetOrganizationRef())
-	if orgRef == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("organization_ref is required"))
-	}
-	orgObjectID, parseErr := primitive.ObjectIDFromHex(orgRef)
-	if parseErr != nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("organization_ref must be a valid objectID"))
-	}
-	intent := req.GetIntent()
-	if intent == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("intent is required"))
-	}
-	if intent.GetAmount() == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("intent.amount is required"))
-	}
-	idempotencyKey := strings.TrimSpace(req.GetIdempotencyKey())
-	if idempotencyKey == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("idempotency_key is required"))
-	}
-
-	store := s.storage.Payments()
-	if store == nil {
-		return gsresponse.Unavailable[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-	}
-
-	existing, err := store.GetByIdempotencyKey(ctx, orgObjectID, idempotencyKey)
-	if err == nil && existing != nil {
-		return gsresponse.Success(&orchestratorv1.InitiatePaymentResponse{
-			Payment: toProtoPayment(existing),
-		})
-	}
-	if err != nil && err != storage.ErrPaymentNotFound {
-		return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	quoteRef := strings.TrimSpace(req.GetQuoteRef())
-	quote := strings.TrimSpace(req.GetFeeQuoteToken())
-	var quoteSnapshot *orchestratorv1.PaymentQuote
-	if quoteRef != "" {
-		quotesStore := s.storage.Quotes()
-		if quotesStore == nil {
-			return gsresponse.Unavailable[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-		}
-		record, err := quotesStore.GetByRef(ctx, orgObjectID, quoteRef)
-		if err != nil {
-			if err == storage.ErrQuoteNotFound {
-				return gsresponse.FailedPrecondition[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, "quote_not_found", merrors.InvalidArgument("quote_ref not found or expired"))
-			}
-			return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-		}
-		if !record.ExpiresAt.IsZero() && s.clock.Now().After(record.ExpiresAt) {
-			return gsresponse.FailedPrecondition[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, "quote_expired", merrors.InvalidArgument("quote_ref expired"))
-		}
-		if !proto.Equal(protoIntentFromModel(record.Intent), intent) {
-			return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("quote_ref does not match intent"))
-		}
-		quoteSnapshot = modelQuoteToProto(record.Quote)
-		if quoteSnapshot == nil {
-			return gsresponse.InvalidArgument[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("stored quote is empty"))
-		}
-		quoteSnapshot.QuoteRef = quoteRef
-	} else if quote == "" {
-		quoteSnapshot, _, err = s.buildPaymentQuote(ctx, orgRef, &orchestratorv1.QuotePaymentRequest{
-			Meta:           req.GetMeta(),
-			IdempotencyKey: req.GetIdempotencyKey(),
-			Intent:         req.GetIntent(),
-			PreviewOnly:    false,
-		})
-		if err != nil {
-			return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-		}
-	} else {
-		quoteSnapshot = &orchestratorv1.PaymentQuote{FeeQuoteToken: quote}
-	}
-
-	entity := &model.Payment{}
-	entity.SetID(primitive.NewObjectID())
-	entity.SetOrganizationRef(orgObjectID)
-	entity.PaymentRef = entity.GetID().Hex()
-	entity.IdempotencyKey = idempotencyKey
-	entity.State = model.PaymentStateAccepted
-	entity.Intent = intentFromProto(intent)
-	entity.Metadata = cloneMetadata(req.GetMetadata())
-	entity.LastQuote = quoteSnapshotToModel(quoteSnapshot)
-	entity.Normalize()
-
-	if err = store.Create(ctx, entity); err != nil {
-		if err == storage.ErrDuplicatePayment {
-			return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.DataConflict("payment already exists"))
-		}
-		return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	if quoteSnapshot == nil {
-		quoteSnapshot = &orchestratorv1.PaymentQuote{}
-	}
-
-	if err := s.executePayment(ctx, store, entity, quoteSnapshot); err != nil {
-		return gsresponse.Auto[orchestratorv1.InitiatePaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	return gsresponse.Success(&orchestratorv1.InitiatePaymentResponse{
-		Payment: toProtoPayment(entity),
-	})
-}
-
-func (s *Service) cancelPaymentHandler(ctx context.Context, req *orchestratorv1.CancelPaymentRequest) gsresponse.Responder[orchestratorv1.CancelPaymentResponse] {
-	if err := s.ensureRepository(ctx); err != nil {
-		return gsresponse.Unavailable[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	if req == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
-	}
-	paymentRef := strings.TrimSpace(req.GetPaymentRef())
-	if paymentRef == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("payment_ref is required"))
-	}
-	store := s.storage.Payments()
-	if store == nil {
-		return gsresponse.Unavailable[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-	}
-	payment, err := store.GetByPaymentRef(ctx, paymentRef)
-	if err != nil {
-		if err == storage.ErrPaymentNotFound {
-			return gsresponse.NotFound[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-		}
-		return gsresponse.Auto[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	if payment.State != model.PaymentStateAccepted {
-		reason := merrors.InvalidArgument("payment cannot be cancelled in current state")
-		return gsresponse.FailedPrecondition[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, "payment_not_cancellable", reason)
-	}
-	payment.State = model.PaymentStateCancelled
-	payment.FailureCode = model.PaymentFailureCodePolicy
-	payment.FailureReason = strings.TrimSpace(req.GetReason())
-	if err := store.Update(ctx, payment); err != nil {
-		return gsresponse.Auto[orchestratorv1.CancelPaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	return gsresponse.Success(&orchestratorv1.CancelPaymentResponse{Payment: toProtoPayment(payment)})
-}
-
-func (s *Service) getPaymentHandler(ctx context.Context, req *orchestratorv1.GetPaymentRequest) gsresponse.Responder[orchestratorv1.GetPaymentResponse] {
-	if err := s.ensureRepository(ctx); err != nil {
-		return gsresponse.Unavailable[orchestratorv1.GetPaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	if req == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.GetPaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
-	}
-	paymentRef := strings.TrimSpace(req.GetPaymentRef())
-	if paymentRef == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.GetPaymentResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("payment_ref is required"))
-	}
-	store := s.storage.Payments()
-	if store == nil {
-		return gsresponse.Unavailable[orchestratorv1.GetPaymentResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-	}
-	entity, err := store.GetByPaymentRef(ctx, paymentRef)
-	if err != nil {
-		if err == storage.ErrPaymentNotFound {
-			return gsresponse.NotFound[orchestratorv1.GetPaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-		}
-		return gsresponse.Auto[orchestratorv1.GetPaymentResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	return gsresponse.Success(&orchestratorv1.GetPaymentResponse{Payment: toProtoPayment(entity)})
-}
-
-func (s *Service) listPaymentsHandler(ctx context.Context, req *orchestratorv1.ListPaymentsRequest) gsresponse.Responder[orchestratorv1.ListPaymentsResponse] {
-	if err := s.ensureRepository(ctx); err != nil {
-		return gsresponse.Unavailable[orchestratorv1.ListPaymentsResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	if req == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.ListPaymentsResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
-	}
-	store := s.storage.Payments()
-	if store == nil {
-		return gsresponse.Unavailable[orchestratorv1.ListPaymentsResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-	}
-	filter := filterFromProto(req)
-	result, err := store.List(ctx, filter)
-	if err != nil {
-		return gsresponse.Auto[orchestratorv1.ListPaymentsResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	resp := &orchestratorv1.ListPaymentsResponse{
-		Page: &paginationv1.CursorPageResponse{
-			NextCursor: result.NextCursor,
-		},
-	}
-	resp.Payments = make([]*orchestratorv1.Payment, 0, len(result.Items))
-	for _, item := range result.Items {
-		resp.Payments = append(resp.Payments, toProtoPayment(item))
-	}
-	return gsresponse.Success(resp)
-}
-
-func (s *Service) initiateConversionHandler(ctx context.Context, req *orchestratorv1.InitiateConversionRequest) gsresponse.Responder[orchestratorv1.InitiateConversionResponse] {
-	if err := s.ensureRepository(ctx); err != nil {
-		return gsresponse.Unavailable[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	if req == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("nil request"))
-	}
-	meta := req.GetMeta()
-	if meta == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("meta is required"))
-	}
-	orgRef := strings.TrimSpace(meta.GetOrganizationRef())
-	if orgRef == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("organization_ref is required"))
-	}
-	orgObjectID, parseErr := primitive.ObjectIDFromHex(orgRef)
-	if parseErr != nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("organization_ref must be a valid objectID"))
-	}
-	idempotencyKey := strings.TrimSpace(req.GetIdempotencyKey())
-	if idempotencyKey == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("idempotency_key is required"))
-	}
-	if req.GetSource() == nil || req.GetSource().GetLedger() == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("source ledger endpoint is required"))
-	}
-	if req.GetDestination() == nil || req.GetDestination().GetLedger() == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("destination ledger endpoint is required"))
-	}
-	fxIntent := req.GetFx()
-	if fxIntent == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("fx intent is required"))
-	}
-
-	store := s.storage.Payments()
-	if store == nil {
-		return gsresponse.Unavailable[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-	}
-
-	if existing, err := store.GetByIdempotencyKey(ctx, orgObjectID, idempotencyKey); err == nil && existing != nil {
-		return gsresponse.Success(&orchestratorv1.InitiateConversionResponse{Conversion: toProtoPayment(existing)})
-	} else if err != nil && err != storage.ErrPaymentNotFound {
-		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	amount, err := conversionAmountFromMetadata(req.GetMetadata(), fxIntent)
-	if err != nil {
-		return gsresponse.InvalidArgument[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	intentProto := &orchestratorv1.PaymentIntent{
-		Kind:        orchestratorv1.PaymentKind_PAYMENT_KIND_FX_CONVERSION,
-		Source:      req.GetSource(),
-		Destination: req.GetDestination(),
-		Amount:      amount,
-		RequiresFx:  true,
-		Fx:          fxIntent,
-		FeePolicy:   req.GetFeePolicy(),
-	}
-
-	quote, _, err := s.buildPaymentQuote(ctx, orgRef, &orchestratorv1.QuotePaymentRequest{
-		Meta:           req.GetMeta(),
-		IdempotencyKey: req.GetIdempotencyKey(),
-		Intent:         intentProto,
-	})
-	if err != nil {
-		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	entity := &model.Payment{}
-	entity.SetID(primitive.NewObjectID())
-	entity.SetOrganizationRef(orgObjectID)
-	entity.PaymentRef = entity.GetID().Hex()
-	entity.IdempotencyKey = idempotencyKey
-	entity.State = model.PaymentStateAccepted
-	entity.Intent = intentFromProto(intentProto)
-	entity.Metadata = cloneMetadata(req.GetMetadata())
-	entity.LastQuote = quoteSnapshotToModel(quote)
-	entity.Normalize()
-
-	if err = store.Create(ctx, entity); err != nil {
-		if err == storage.ErrDuplicatePayment {
-			return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, merrors.DataConflict("payment already exists"))
-		}
-		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	if err := s.executePayment(ctx, store, entity, quote); err != nil {
-		return gsresponse.Auto[orchestratorv1.InitiateConversionResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-
-	return gsresponse.Success(&orchestratorv1.InitiateConversionResponse{
-		Conversion: toProtoPayment(entity),
-	})
-}
-
-func (s *Service) processTransferUpdateHandler(ctx context.Context, req *orchestratorv1.ProcessTransferUpdateRequest) gsresponse.Responder[orchestratorv1.ProcessTransferUpdateResponse] {
-	if err := s.ensureRepository(ctx); err != nil {
-		return gsresponse.Unavailable[orchestratorv1.ProcessTransferUpdateResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	if req == nil || req.GetEvent() == nil || req.GetEvent().GetTransfer() == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.ProcessTransferUpdateResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("transfer event is required"))
-	}
-	transfer := req.GetEvent().GetTransfer()
-	transferRef := strings.TrimSpace(transfer.GetTransferRef())
-	if transferRef == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.ProcessTransferUpdateResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("transfer_ref is required"))
-	}
-	store := s.storage.Payments()
-	if store == nil {
-		return gsresponse.Unavailable[orchestratorv1.ProcessTransferUpdateResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-	}
-	payment, err := store.GetByChainTransferRef(ctx, transferRef)
-	if err != nil {
-		if err == storage.ErrPaymentNotFound {
-			return gsresponse.NotFound[orchestratorv1.ProcessTransferUpdateResponse](s.logger, mservice.PaymentOrchestrator, err)
-		}
-		return gsresponse.Auto[orchestratorv1.ProcessTransferUpdateResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	applyTransferStatus(req.GetEvent(), payment)
-	if err := store.Update(ctx, payment); err != nil {
-		return gsresponse.Auto[orchestratorv1.ProcessTransferUpdateResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	return gsresponse.Success(&orchestratorv1.ProcessTransferUpdateResponse{Payment: toProtoPayment(payment)})
-}
-
-func (s *Service) processDepositObservedHandler(ctx context.Context, req *orchestratorv1.ProcessDepositObservedRequest) gsresponse.Responder[orchestratorv1.ProcessDepositObservedResponse] {
-	if err := s.ensureRepository(ctx); err != nil {
-		return gsresponse.Unavailable[orchestratorv1.ProcessDepositObservedResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	if req == nil || req.GetEvent() == nil {
-		return gsresponse.InvalidArgument[orchestratorv1.ProcessDepositObservedResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("deposit event is required"))
-	}
-	event := req.GetEvent()
-	walletRef := strings.TrimSpace(event.GetWalletRef())
-	if walletRef == "" {
-		return gsresponse.InvalidArgument[orchestratorv1.ProcessDepositObservedResponse](s.logger, mservice.PaymentOrchestrator, merrors.InvalidArgument("wallet_ref is required"))
-	}
-	store := s.storage.Payments()
-	if store == nil {
-		return gsresponse.Unavailable[orchestratorv1.ProcessDepositObservedResponse](s.logger, mservice.PaymentOrchestrator, errStorageUnavailable)
-	}
-	filter := &model.PaymentFilter{
-		States:         []model.PaymentState{model.PaymentStateSubmitted, model.PaymentStateFundsReserved},
-		DestinationRef: walletRef,
-	}
-	result, err := store.List(ctx, filter)
-	if err != nil {
-		return gsresponse.Auto[orchestratorv1.ProcessDepositObservedResponse](s.logger, mservice.PaymentOrchestrator, err)
-	}
-	for _, payment := range result.Items {
-		if payment.Intent.Destination.Type != model.EndpointTypeManagedWallet {
-			continue
-		}
-		if !moneyEquals(payment.Intent.Amount, event.GetAmount()) {
-			continue
-		}
-		payment.State = model.PaymentStateSettled
-		payment.FailureCode = model.PaymentFailureCodeUnspecified
-		payment.FailureReason = ""
-		if payment.Execution == nil {
-			payment.Execution = &model.ExecutionRefs{}
-		}
-		if payment.Execution.ChainTransferRef == "" {
-			payment.Execution.ChainTransferRef = strings.TrimSpace(event.GetTransactionHash())
-		}
-		if err := store.Update(ctx, payment); err != nil {
-			return gsresponse.Auto[orchestratorv1.ProcessDepositObservedResponse](s.logger, mservice.PaymentOrchestrator, err)
-		}
-		return gsresponse.Success(&orchestratorv1.ProcessDepositObservedResponse{Payment: toProtoPayment(payment)})
-	}
-	return gsresponse.Success(&orchestratorv1.ProcessDepositObservedResponse{})
 }

api/payments/orchestrator/internal/service/orchestrator/service_helpers.go

@@ -0,0 +1,165 @@
+package orchestrator
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"github.com/tech/sendico/payments/orchestrator/storage"
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	"github.com/tech/sendico/pkg/api/routers/gsresponse"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"github.com/tech/sendico/pkg/mservice"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"google.golang.org/protobuf/proto"
+)
+
+func validateMetaAndOrgRef(meta *orchestratorv1.RequestMeta) (string, primitive.ObjectID, error) {
+	if meta == nil {
+		return "", primitive.NilObjectID, merrors.InvalidArgument("meta is required")
+	}
+	orgRef := strings.TrimSpace(meta.GetOrganizationRef())
+	if orgRef == "" {
+		return "", primitive.NilObjectID, merrors.InvalidArgument("organization_ref is required")
+	}
+	orgID, err := primitive.ObjectIDFromHex(orgRef)
+	if err != nil {
+		return "", primitive.NilObjectID, merrors.InvalidArgument("organization_ref must be a valid objectID")
+	}
+	return orgRef, orgID, nil
+}
+
+func requireIdempotencyKey(k string) (string, error) {
+	key := strings.TrimSpace(k)
+	if key == "" {
+		return "", merrors.InvalidArgument("idempotency_key is required")
+	}
+	return key, nil
+}
+
+func requirePaymentRef(ref string) (string, error) {
+	val := strings.TrimSpace(ref)
+	if val == "" {
+		return "", merrors.InvalidArgument("payment_ref is required")
+	}
+	return val, nil
+}
+
+func requireNonNilIntent(intent *orchestratorv1.PaymentIntent) error {
+	if intent == nil {
+		return merrors.InvalidArgument("intent is required")
+	}
+	if intent.GetAmount() == nil {
+		return merrors.InvalidArgument("intent.amount is required")
+	}
+	return nil
+}
+
+func ensurePaymentsStore(repo storage.Repository) (storage.PaymentsStore, error) {
+	if repo == nil {
+		return nil, errStorageUnavailable
+	}
+	store := repo.Payments()
+	if store == nil {
+		return nil, errStorageUnavailable
+	}
+	return store, nil
+}
+
+func ensureQuotesStore(repo storage.Repository) (storage.QuotesStore, error) {
+	if repo == nil {
+		return nil, errStorageUnavailable
+	}
+	store := repo.Quotes()
+	if store == nil {
+		return nil, errStorageUnavailable
+	}
+	return store, nil
+}
+
+func getPaymentByIdempotencyKey(ctx context.Context, store storage.PaymentsStore, orgID primitive.ObjectID, key string) (*model.Payment, error) {
+	payment, err := store.GetByIdempotencyKey(ctx, orgID, key)
+	if err != nil {
+		return nil, err
+	}
+	return payment, nil
+}
+
+type quoteResolutionInput struct {
+	OrgRef         string
+	OrgID          primitive.ObjectID
+	Meta           *orchestratorv1.RequestMeta
+	Intent         *orchestratorv1.PaymentIntent
+	QuoteRef       string
+	IdempotencyKey string
+}
+
+type quoteResolutionError struct {
+	code string
+	err  error
+}
+
+func (e quoteResolutionError) Error() string { return e.err.Error() }
+
+func (s *Service) resolvePaymentQuote(ctx context.Context, in quoteResolutionInput) (*orchestratorv1.PaymentQuote, error) {
+	if ref := strings.TrimSpace(in.QuoteRef); ref != "" {
+		quotesStore, err := ensureQuotesStore(s.storage)
+		if err != nil {
+			return nil, err
+		}
+		record, err := quotesStore.GetByRef(ctx, in.OrgID, ref)
+		if err != nil {
+			if errors.Is(err, storage.ErrQuoteNotFound) {
+				return nil, quoteResolutionError{code: "quote_not_found", err: merrors.InvalidArgument("quote_ref not found or expired")}
+			}
+			return nil, err
+		}
+		if !record.ExpiresAt.IsZero() && s.clock.Now().After(record.ExpiresAt) {
+			return nil, quoteResolutionError{code: "quote_expired", err: merrors.InvalidArgument("quote_ref expired")}
+		}
+		if !proto.Equal(protoIntentFromModel(record.Intent), in.Intent) {
+			return nil, quoteResolutionError{code: "quote_intent_mismatch", err: merrors.InvalidArgument("quote_ref does not match intent")}
+		}
+		quote := modelQuoteToProto(record.Quote)
+		if quote == nil {
+			return nil, merrors.InvalidArgument("stored quote is empty")
+		}
+		quote.QuoteRef = ref
+		return quote, nil
+	}
+
+	req := &orchestratorv1.QuotePaymentRequest{
+		Meta:           in.Meta,
+		IdempotencyKey: in.IdempotencyKey,
+		Intent:         in.Intent,
+		PreviewOnly:    false,
+	}
+	quote, _, err := s.buildPaymentQuote(ctx, in.OrgRef, req)
+	if err != nil {
+		return nil, err
+	}
+	return quote, nil
+}
+
+func newPayment(orgID primitive.ObjectID, intent *orchestratorv1.PaymentIntent, idempotencyKey string, metadata map[string]string, quote *orchestratorv1.PaymentQuote) *model.Payment {
+	entity := &model.Payment{}
+	entity.SetID(primitive.NewObjectID())
+	entity.SetOrganizationRef(orgID)
+	entity.PaymentRef = entity.GetID().Hex()
+	entity.IdempotencyKey = idempotencyKey
+	entity.State = model.PaymentStateAccepted
+	entity.Intent = intentFromProto(intent)
+	entity.Metadata = cloneMetadata(metadata)
+	entity.LastQuote = quoteSnapshotToModel(quote)
+	entity.Normalize()
+	return entity
+}
+
+func paymentNotFoundResponder[T any](svc mservice.Type, logger mlogger.Logger, err error) gsresponse.Responder[T] {
+	if errors.Is(err, storage.ErrPaymentNotFound) {
+		return gsresponse.NotFound[T](logger, svc, err)
+	}
+	return gsresponse.Auto[T](logger, svc, err)
+}

api/payments/orchestrator/internal/service/orchestrator/service_helpers_test.go

@@ -0,0 +1,236 @@
+package orchestrator
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/tech/sendico/payments/orchestrator/storage"
+	"github.com/tech/sendico/payments/orchestrator/storage/model"
+	clockpkg "github.com/tech/sendico/pkg/clock"
+	mloggerfactory "github.com/tech/sendico/pkg/mlogger/factory"
+	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+func TestValidateMetaAndOrgRef(t *testing.T) {
+	org := primitive.NewObjectID()
+	meta := &orchestratorv1.RequestMeta{OrganizationRef: org.Hex()}
+	ref, id, err := validateMetaAndOrgRef(meta)
+	if err != nil {
+		t.Fatalf("expected nil error: %v", err)
+	}
+	if ref != org.Hex() || id != org {
+		t.Fatalf("unexpected org parsing: %s %s", ref, id.Hex())
+	}
+	if _, _, err := validateMetaAndOrgRef(nil); err == nil {
+		t.Fatalf("expected error on nil meta")
+	}
+	if _, _, err := validateMetaAndOrgRef(&orchestratorv1.RequestMeta{OrganizationRef: ""}); err == nil {
+		t.Fatalf("expected error on empty orgRef")
+	}
+	if _, _, err := validateMetaAndOrgRef(&orchestratorv1.RequestMeta{OrganizationRef: "bad"}); err == nil {
+		t.Fatalf("expected error on invalid orgRef")
+	}
+}
+
+func TestRequireIdempotencyKey(t *testing.T) {
+	if _, err := requireIdempotencyKey("   "); err == nil {
+		t.Fatalf("expected error for empty key")
+	}
+	val, err := requireIdempotencyKey(" key ")
+	if err != nil || val != "key" {
+		t.Fatalf("unexpected result %s err %v", val, err)
+	}
+}
+
+func TestNewPayment(t *testing.T) {
+	org := primitive.NewObjectID()
+	intent := &orchestratorv1.PaymentIntent{
+		Amount:         &moneyv1.Money{Currency: "USD", Amount: "10"},
+		SettlementMode: orchestratorv1.SettlementMode_SETTLEMENT_MODE_FIX_RECEIVED,
+	}
+	quote := &orchestratorv1.PaymentQuote{QuoteRef: "q1"}
+	p := newPayment(org, intent, "idem", map[string]string{"k": "v"}, quote)
+	if p.PaymentRef == "" || p.IdempotencyKey != "idem" || p.State != model.PaymentStateAccepted {
+		t.Fatalf("unexpected payment fields: %+v", p)
+	}
+	if p.Intent.Amount == nil || p.Intent.Amount.GetAmount() != "10" {
+		t.Fatalf("intent not copied")
+	}
+	if p.Intent.SettlementMode != orchestratorv1.SettlementMode_SETTLEMENT_MODE_FIX_RECEIVED {
+		t.Fatalf("settlement mode not preserved")
+	}
+	if p.LastQuote == nil || p.LastQuote.QuoteRef != "q1" {
+		t.Fatalf("quote not copied")
+	}
+}
+
+func TestResolvePaymentQuote_NotFound(t *testing.T) {
+	org := primitive.NewObjectID()
+	svc := &Service{
+		storage: stubRepo{quotes: &helperQuotesStore{}},
+		clock:   clockpkg.NewSystem(),
+	}
+	_, err := svc.resolvePaymentQuote(context.Background(), quoteResolutionInput{
+		OrgRef:   org.Hex(),
+		OrgID:    org,
+		Meta:     &orchestratorv1.RequestMeta{OrganizationRef: org.Hex()},
+		Intent:   &orchestratorv1.PaymentIntent{Amount: &moneyv1.Money{Currency: "USD", Amount: "1"}},
+		QuoteRef: "missing",
+	})
+	if qerr, ok := err.(quoteResolutionError); !ok || qerr.code != "quote_not_found" {
+		t.Fatalf("expected quote_not_found, got %v", err)
+	}
+}
+
+func TestResolvePaymentQuote_Expired(t *testing.T) {
+	org := primitive.NewObjectID()
+	intent := &orchestratorv1.PaymentIntent{Amount: &moneyv1.Money{Currency: "USD", Amount: "1"}}
+	record := &model.PaymentQuoteRecord{
+		QuoteRef:  "q1",
+		Intent:    intentFromProto(intent),
+		Quote:     &model.PaymentQuoteSnapshot{},
+		ExpiresAt: time.Now().Add(-time.Minute),
+	}
+	svc := &Service{
+		storage: stubRepo{quotes: &helperQuotesStore{records: map[string]*model.PaymentQuoteRecord{"q1": record}}},
+		clock:   clockpkg.NewSystem(),
+	}
+	_, err := svc.resolvePaymentQuote(context.Background(), quoteResolutionInput{
+		OrgRef:   org.Hex(),
+		OrgID:    org,
+		Meta:     &orchestratorv1.RequestMeta{OrganizationRef: org.Hex()},
+		Intent:   intent,
+		QuoteRef: "q1",
+	})
+	if qerr, ok := err.(quoteResolutionError); !ok || qerr.code != "quote_expired" {
+		t.Fatalf("expected quote_expired, got %v", err)
+	}
+}
+
+func TestInitiatePaymentIdempotency(t *testing.T) {
+	logger := mloggerfactory.NewLogger(false)
+	org := primitive.NewObjectID()
+	store := newHelperPaymentStore()
+	svc := NewService(logger, stubRepo{
+		payments: store,
+	}, WithClock(clockpkg.NewSystem()))
+	svc.ensureHandlers()
+
+	intent := &orchestratorv1.PaymentIntent{
+		Amount: &moneyv1.Money{Currency: "USD", Amount: "1"},
+	}
+	req := &orchestratorv1.InitiatePaymentRequest{
+		Meta:           &orchestratorv1.RequestMeta{OrganizationRef: org.Hex()},
+		Intent:         intent,
+		IdempotencyKey: "k1",
+	}
+	resp, err := svc.h.commands.InitiatePayment().Execute(context.Background(), req)(context.Background())
+	if err != nil {
+		t.Fatalf("first call failed: %v", err)
+	}
+	resp2, err := svc.h.commands.InitiatePayment().Execute(context.Background(), req)(context.Background())
+	if err != nil {
+		t.Fatalf("second call failed: %v", err)
+	}
+	if resp == nil || resp2 == nil || resp.Payment.GetPaymentRef() != resp2.Payment.GetPaymentRef() {
+		t.Fatalf("idempotent call returned different payments")
+	}
+}
+
+// --- test doubles ---
+
+type stubRepo struct {
+	payments storage.PaymentsStore
+	quotes   storage.QuotesStore
+	pingErr  error
+}
+
+func (s stubRepo) Ping(context.Context) error      { return s.pingErr }
+func (s stubRepo) Payments() storage.PaymentsStore { return s.payments }
+func (s stubRepo) Quotes() storage.QuotesStore     { return s.quotes }
+
+type helperPaymentStore struct {
+	byRef   map[string]*model.Payment
+	byIdem  map[string]*model.Payment
+	byChain map[string]*model.Payment
+}
+
+func newHelperPaymentStore() *helperPaymentStore {
+	return &helperPaymentStore{
+		byRef:   make(map[string]*model.Payment),
+		byIdem:  make(map[string]*model.Payment),
+		byChain: make(map[string]*model.Payment),
+	}
+}
+
+func (s *helperPaymentStore) Create(_ context.Context, p *model.Payment) error {
+	if _, ok := s.byRef[p.PaymentRef]; ok {
+		return storage.ErrDuplicatePayment
+	}
+	s.byRef[p.PaymentRef] = p
+	if p.IdempotencyKey != "" {
+		s.byIdem[p.IdempotencyKey] = p
+	}
+	if p.Execution != nil && p.Execution.ChainTransferRef != "" {
+		s.byChain[p.Execution.ChainTransferRef] = p
+	}
+	return nil
+}
+
+func (s *helperPaymentStore) Update(_ context.Context, p *model.Payment) error {
+	if p == nil {
+		return storage.ErrPaymentNotFound
+	}
+	if _, ok := s.byRef[p.PaymentRef]; !ok {
+		return storage.ErrPaymentNotFound
+	}
+	s.byRef[p.PaymentRef] = p
+	if p.IdempotencyKey != "" {
+		s.byIdem[p.IdempotencyKey] = p
+	}
+	return nil
+}
+
+func (s *helperPaymentStore) GetByPaymentRef(_ context.Context, ref string) (*model.Payment, error) {
+	if p, ok := s.byRef[ref]; ok {
+		return p, nil
+	}
+	return nil, storage.ErrPaymentNotFound
+}
+
+func (s *helperPaymentStore) GetByIdempotencyKey(_ context.Context, _ primitive.ObjectID, key string) (*model.Payment, error) {
+	if p, ok := s.byIdem[key]; ok {
+		return p, nil
+	}
+	return nil, storage.ErrPaymentNotFound
+}
+
+func (s *helperPaymentStore) GetByChainTransferRef(_ context.Context, ref string) (*model.Payment, error) {
+	if p, ok := s.byChain[ref]; ok {
+		return p, nil
+	}
+	return nil, storage.ErrPaymentNotFound
+}
+
+func (s *helperPaymentStore) List(_ context.Context, _ *model.PaymentFilter) (*model.PaymentList, error) {
+	return &model.PaymentList{}, nil
+}
+
+type helperQuotesStore struct {
+	records map[string]*model.PaymentQuoteRecord
+}
+
+func (s *helperQuotesStore) Create(_ context.Context, _ *model.PaymentQuoteRecord) error { return nil }
+
+func (s *helperQuotesStore) GetByRef(_ context.Context, _ primitive.ObjectID, ref string) (*model.PaymentQuoteRecord, error) {
+	if s.records == nil {
+		return nil, storage.ErrQuoteNotFound
+	}
+	if rec, ok := s.records[ref]; ok {
+		return rec, nil
+	}
+	return nil, storage.ErrQuoteNotFound
+}

api/payments/orchestrator/internal/service/orchestrator/service_test.go

@@ -32,11 +32,13 @@ func TestExecutePayment_FXConversionSettled(t *testing.T) {
 		logger:  zap.NewNop(),
 		clock:   testClock{now: time.Now()},
 		storage: repo,
+		deps: serviceDependencies{
 			ledger: ledgerDependency{client: &ledgerclient.Fake{
 				ApplyFXWithChargesFn: func(ctx context.Context, req *ledgerv1.FXRequest) (*ledgerv1.PostResponse, error) {
 					return &ledgerv1.PostResponse{JournalEntryRef: "fx-entry"}, nil
 				},
 			}},
+		},
 	}
 
 	payment := &model.Payment{
@@ -88,11 +90,13 @@ func TestExecutePayment_ChainFailure(t *testing.T) {
 		logger:  zap.NewNop(),
 		clock:   testClock{now: time.Now()},
 		storage: repo,
+		deps: serviceDependencies{
 			gateway: gatewayDependency{client: &chainclient.Fake{
 				SubmitTransferFn: func(ctx context.Context, req *chainv1.SubmitTransferRequest) (*chainv1.SubmitTransferResponse, error) {
 					return nil, errors.New("chain failure")
 				},
 			}},
+		},
 	}
 
 	payment := &model.Payment{
@@ -146,6 +150,7 @@ func TestProcessTransferUpdateHandler_Settled(t *testing.T) {
 		clock:   testClock{now: time.Now()},
 		storage: &stubRepository{store: store},
 	}
+	svc.h.events = newPaymentEventHandler(svc.storage, svc.ensureRepository, svc.logger)
 
 	req := &orchestratorv1.ProcessTransferUpdateRequest{
 		Event: &chainv1.TransferStatusChangedEvent{
@@ -156,7 +161,7 @@ func TestProcessTransferUpdateHandler_Settled(t *testing.T) {
 		},
 	}
 
-	reSP, err := gsresponse.Execute(ctx, svc.processTransferUpdateHandler(ctx, req))
+	reSP, err := gsresponse.Execute(ctx, svc.h.events.processTransferUpdate(ctx, req))
 	if err != nil {
 		t.Fatalf("handler returned error: %v", err)
 	}
@@ -189,6 +194,7 @@ func TestProcessDepositObservedHandler_MatchesPayment(t *testing.T) {
 		clock:   testClock{now: time.Now()},
 		storage: &stubRepository{store: store},
 	}
+	svc.h.events = newPaymentEventHandler(svc.storage, svc.ensureRepository, svc.logger)
 
 	req := &orchestratorv1.ProcessDepositObservedRequest{
 		Event: &chainv1.WalletDepositObservedEvent{
@@ -197,7 +203,7 @@ func TestProcessDepositObservedHandler_MatchesPayment(t *testing.T) {
 		},
 	}
 
-	reSP, err := gsresponse.Execute(ctx, svc.processDepositObservedHandler(ctx, req))
+	reSP, err := gsresponse.Execute(ctx, svc.h.events.processDepositObserved(ctx, req))
 	if err != nil {
 		t.Fatalf("handler returned error: %v", err)
 	}

api/payments/orchestrator/storage/model/payment.go

@@ -11,6 +11,7 @@ import (
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
 	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
+	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
 )
 
 // PaymentKind captures the orchestrator intent type.
@@ -57,6 +58,7 @@ const (
 	EndpointTypeLedger        PaymentEndpointType = "ledger"
 	EndpointTypeManagedWallet PaymentEndpointType = "managed_wallet"
 	EndpointTypeExternalChain PaymentEndpointType = "external_chain"
+	EndpointTypeCard          PaymentEndpointType = "card"
 )
 
 // LedgerEndpoint describes ledger routing.
@@ -78,12 +80,36 @@ type ExternalChainEndpoint struct {
 	Memo    string         `bson:"memo,omitempty" json:"memo,omitempty"`
 }
 
+// CardEndpoint describes a card payout destination.
+type CardEndpoint struct {
+	Pan        string `bson:"pan,omitempty" json:"pan,omitempty"`
+	Token      string `bson:"token,omitempty" json:"token,omitempty"`
+	Cardholder string `bson:"cardholder,omitempty" json:"cardholder,omitempty"`
+	ExpMonth   uint32 `bson:"expMonth,omitempty" json:"expMonth,omitempty"`
+	ExpYear    uint32 `bson:"expYear,omitempty" json:"expYear,omitempty"`
+	Country    string `bson:"country,omitempty" json:"country,omitempty"`
+	MaskedPan  string `bson:"maskedPan,omitempty" json:"maskedPan,omitempty"`
+}
+
+// CardPayout stores gateway payout tracking info.
+type CardPayout struct {
+	PayoutRef         string `bson:"payoutRef,omitempty" json:"payoutRef,omitempty"`
+	ProviderPaymentID string `bson:"providerPaymentId,omitempty" json:"providerPaymentId,omitempty"`
+	Status            string `bson:"status,omitempty" json:"status,omitempty"`
+	FailureReason     string `bson:"failureReason,omitempty" json:"failureReason,omitempty"`
+	CardCountry       string `bson:"cardCountry,omitempty" json:"cardCountry,omitempty"`
+	MaskedPan         string `bson:"maskedPan,omitempty" json:"maskedPan,omitempty"`
+	ProviderCode      string `bson:"providerCode,omitempty" json:"providerCode,omitempty"`
+	GatewayReference  string `bson:"gatewayReference,omitempty" json:"gatewayReference,omitempty"`
+}
+
 // PaymentEndpoint is a polymorphic payment destination/source.
 type PaymentEndpoint struct {
 	Type          PaymentEndpointType    `bson:"type" json:"type"`
 	Ledger        *LedgerEndpoint        `bson:"ledger,omitempty" json:"ledger,omitempty"`
 	ManagedWallet *ManagedWalletEndpoint `bson:"managedWallet,omitempty" json:"managedWallet,omitempty"`
 	ExternalChain *ExternalChainEndpoint `bson:"externalChain,omitempty" json:"externalChain,omitempty"`
+	Card          *CardEndpoint          `bson:"card,omitempty" json:"card,omitempty"`
 	Metadata      map[string]string      `bson:"metadata,omitempty" json:"metadata,omitempty"`
 }
 
@@ -106,6 +132,7 @@ type PaymentIntent struct {
 	RequiresFX     bool                          `bson:"requiresFx,omitempty" json:"requiresFx,omitempty"`
 	FX             *FXIntent                     `bson:"fx,omitempty" json:"fx,omitempty"`
 	FeePolicy      *feesv1.PolicyOverrides       `bson:"feePolicy,omitempty" json:"feePolicy,omitempty"`
+	SettlementMode orchestratorv1.SettlementMode `bson:"settlementMode,omitempty" json:"settlementMode,omitempty"`
 	Attributes     map[string]string             `bson:"attributes,omitempty" json:"attributes,omitempty"`
 }
 
@@ -118,7 +145,6 @@ type PaymentQuoteSnapshot struct {
 	FeeRules                 []*feesv1.AppliedRule                `bson:"feeRules,omitempty" json:"feeRules,omitempty"`
 	FXQuote                  *oraclev1.Quote                      `bson:"fxQuote,omitempty" json:"fxQuote,omitempty"`
 	NetworkFee               *chainv1.EstimateTransferFeeResponse `bson:"networkFee,omitempty" json:"networkFee,omitempty"`
-	FeeQuoteToken            string                               `bson:"feeQuoteToken,omitempty" json:"feeQuoteToken,omitempty"`
 	QuoteRef                 string                               `bson:"quoteRef,omitempty" json:"quoteRef,omitempty"`
 }
 
@@ -128,6 +154,8 @@ type ExecutionRefs struct {
 	CreditEntryRef   string `bson:"creditEntryRef,omitempty" json:"creditEntryRef,omitempty"`
 	FXEntryRef       string `bson:"fxEntryRef,omitempty" json:"fxEntryRef,omitempty"`
 	ChainTransferRef string `bson:"chainTransferRef,omitempty" json:"chainTransferRef,omitempty"`
+	CardPayoutRef    string `bson:"cardPayoutRef,omitempty" json:"cardPayoutRef,omitempty"`
+	FeeTransferRef   string `bson:"feeTransferRef,omitempty" json:"feeTransferRef,omitempty"`
 }
 
 // Payment persists orchestrated payment lifecycle.
@@ -144,6 +172,7 @@ type Payment struct {
 	LastQuote      *PaymentQuoteSnapshot `bson:"lastQuote,omitempty" json:"lastQuote,omitempty"`
 	Execution      *ExecutionRefs        `bson:"execution,omitempty" json:"execution,omitempty"`
 	Metadata       map[string]string     `bson:"metadata,omitempty" json:"metadata,omitempty"`
+	CardPayout     *CardPayout           `bson:"cardPayout,omitempty" json:"cardPayout,omitempty"`
 }
 
 // Collection implements storable.Storable.
@@ -223,5 +252,13 @@ func normalizeEndpoint(ep *PaymentEndpoint) {
 				ep.ExternalChain.Asset.ContractAddress = strings.TrimSpace(strings.ToLower(ep.ExternalChain.Asset.ContractAddress))
 			}
 		}
+	case EndpointTypeCard:
+		if ep.Card != nil {
+			ep.Card.Pan = strings.TrimSpace(ep.Card.Pan)
+			ep.Card.Token = strings.TrimSpace(ep.Card.Token)
+			ep.Card.Cardholder = strings.TrimSpace(ep.Card.Cardholder)
+			ep.Card.Country = strings.TrimSpace(ep.Card.Country)
+			ep.Card.MaskedPan = strings.TrimSpace(ep.Card.MaskedPan)
+		}
 	}
 }

api/payments/orchestrator/storage/model/quote.go

@@ -13,8 +13,10 @@ type PaymentQuoteRecord struct {
 	model.OrganizationBoundBase `bson:",inline" json:",inline"`
 
 	QuoteRef  string                  `bson:"quoteRef" json:"quoteRef"`
-	Intent    PaymentIntent         `bson:"intent" json:"intent"`
+	Intent    PaymentIntent           `bson:"intent,omitempty" json:"intent,omitempty"`
-	Quote     *PaymentQuoteSnapshot `bson:"quote" json:"quote"`
+	Intents   []PaymentIntent         `bson:"intents,omitempty" json:"intents,omitempty"`
+	Quote     *PaymentQuoteSnapshot   `bson:"quote,omitempty" json:"quote,omitempty"`
+	Quotes    []*PaymentQuoteSnapshot `bson:"quotes,omitempty" json:"quotes,omitempty"`
 	ExpiresAt time.Time               `bson:"expiresAt" json:"expiresAt"`
 }
 

api/payments/orchestrator/storage/mongo/store/quotes.go

@@ -73,6 +73,16 @@ func (q *Quotes) Create(ctx context.Context, quote *model.PaymentQuoteRecord) er
 			quote.Intent.Attributes[k] = strings.TrimSpace(v)
 		}
 	}
+	if len(quote.Intents) > 0 {
+		for i := range quote.Intents {
+			if quote.Intents[i].Attributes == nil {
+				continue
+			}
+			for k, v := range quote.Intents[i].Attributes {
+				quote.Intents[i].Attributes[k] = strings.TrimSpace(v)
+			}
+		}
+	}
 	quote.Update()
 
 	filter := repository.OrgFilter(quote.OrganizationRef).And(