outbox for gateways

api/billing/documents/go.mod

@@ -6,8 +6,8 @@ replace github.com/tech/sendico/pkg => ../../pkg
 
 require (
 	github.com/aws/aws-sdk-go-v2 v1.41.1
-	github.com/aws/aws-sdk-go-v2/config v1.32.7
+	github.com/aws/aws-sdk-go-v2/config v1.32.8
-	github.com/aws/aws-sdk-go-v2/credentials v1.19.7
+	github.com/aws/aws-sdk-go-v2/credentials v1.19.8
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.96.0
 	github.com/jung-kurt/gofpdf v1.16.2
 	github.com/prometheus/client_golang v1.23.2
@@ -32,7 +32,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.17 // indirect
 	github.com/aws/aws-sdk-go-v2/service/signin v1.0.5 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.30.9 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.13 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.14 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.41.6 // indirect
 	github.com/aws/smithy-go v1.24.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
@@ -65,6 +65,6 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 )

api/billing/documents/go.sum

@@ -8,10 +8,10 @@ github.com/aws/aws-sdk-go-v2 v1.41.1 h1:ABlyEARCDLN034NhxlRUSZr4l71mh+T5KAeGh6ce
 github.com/aws/aws-sdk-go-v2 v1.41.1/go.mod h1:MayyLB8y+buD9hZqkCW3kX1AKq07Y5pXxtgB+rRFhz0=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.4 h1:489krEF9xIGkOaaX3CE/Be2uWjiXrkCH6gUX+bZA/BU=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.4/go.mod h1:IOAPF6oT9KCsceNTvvYMNHy0+kMF8akOjeDvPENWxp4=
-github.com/aws/aws-sdk-go-v2/config v1.32.7 h1:vxUyWGUwmkQ2g19n7JY/9YL8MfAIl7bTesIUykECXmY=
+github.com/aws/aws-sdk-go-v2/config v1.32.8 h1:iu+64gwDKEoKnyTQskSku72dAwggKI5sV6rNvgSMpMs=
-github.com/aws/aws-sdk-go-v2/config v1.32.7/go.mod h1:2/Qm5vKUU/r7Y+zUk/Ptt2MDAEKAfUtKc1+3U1Mo3oY=
+github.com/aws/aws-sdk-go-v2/config v1.32.8/go.mod h1:MI2XvA+qDi3i9AJxX1E2fu730syEBzp/jnXrjxuHwgI=
-github.com/aws/aws-sdk-go-v2/credentials v1.19.7 h1:tHK47VqqtJxOymRrNtUXN5SP/zUTvZKeLx4tH6PGQc8=
+github.com/aws/aws-sdk-go-v2/credentials v1.19.8 h1:Jp2JYH1lRT3KhX4mshHPvVYsR5qqRec3hGvEarNYoR0=
-github.com/aws/aws-sdk-go-v2/credentials v1.19.7/go.mod h1:qOZk8sPDrxhf+4Wf4oT2urYJrYt3RejHSzgAquYeppw=
+github.com/aws/aws-sdk-go-v2/credentials v1.19.8/go.mod h1:fZG9tuvyVfxknv1rKibIz3DobRaFw1Poe8IKtXB3XYY=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.17 h1:I0GyV8wiYrP8XpA70g1HBcQO1JlQxCMTW9npl5UbDHY=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.17/go.mod h1:tyw7BOl5bBe/oqvoIeECFJjMdzXoa/dfVz3QQ5lgHGA=
 github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.17 h1:xOLELNKGp2vsiteLsvLPwxC+mYmO6OZ8PYgiuPJzF8U=
@@ -36,8 +36,8 @@ github.com/aws/aws-sdk-go-v2/service/signin v1.0.5 h1:VrhDvQib/i0lxvr3zqlUwLwJP4
 github.com/aws/aws-sdk-go-v2/service/signin v1.0.5/go.mod h1:k029+U8SY30/3/ras4G/Fnv/b88N4mAfliNn08Dem4M=
 github.com/aws/aws-sdk-go-v2/service/sso v1.30.9 h1:v6EiMvhEYBoHABfbGB4alOYmCIrcgyPPiBE1wZAEbqk=
 github.com/aws/aws-sdk-go-v2/service/sso v1.30.9/go.mod h1:yifAsgBxgJWn3ggx70A3urX2AN49Y5sJTD1UQFlfqBw=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.13 h1:gd84Omyu9JLriJVCbGApcLzVR3XtmC4ZDPcAI6Ftvds=
+github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.14 h1:0jbJeuEHlwKJ9PfXtpSFc4MF+WIWORdhN1n30ITZGFM=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.13/go.mod h1:sTGThjphYE4Ohw8vJiRStAcu3rbjtXRsdNB0TvZ5wwo=
+github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.14/go.mod h1:sTGThjphYE4Ohw8vJiRStAcu3rbjtXRsdNB0TvZ5wwo=
 github.com/aws/aws-sdk-go-v2/service/sts v1.41.6 h1:5fFjR/ToSOzB2OQ/XqWpZBmNvmP/pJ1jOWYlFDJTjRQ=
 github.com/aws/aws-sdk-go-v2/service/sts v1.41.6/go.mod h1:qgFDZQSD/Kys7nJnVqYlWKnh0SSdMjAi0uSwON4wgYQ=
 github.com/aws/smithy-go v1.24.0 h1:LpilSUItNPFr1eY85RYgTIg5eIEPtvFbskaFcmmIUnk=
@@ -258,8 +258,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

api/billing/documents/internal/service/documents/service.go

@@ -111,7 +111,7 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 	}
 	if svc.template == nil {
 		if tmpl, err := newTemplateRenderer(svc.config.AcceptanceTemplatePath()); err != nil {
-			svc.logger.Warn("failed to load acceptance template", zap.Error(err))
+			svc.logger.Warn("Failed to load acceptance template", zap.Error(err))
 		} else {
 			svc.template = tmpl
 		}

api/billing/documents/internal/service/documents/template.go

@@ -20,7 +20,7 @@ type templateRenderer struct {
 func newTemplateRenderer(path string) (*templateRenderer, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
-		return nil, fmt.Errorf("read template: %w", err)
+		return nil, fmt.Errorf("Read template: %w", err)
 	}
 
 	funcs := template.FuncMap{
@@ -30,7 +30,7 @@ func newTemplateRenderer(path string) (*templateRenderer, error) {
 
 	tpl, err := template.New("acceptance").Funcs(funcs).Option("missingkey=error").Parse(string(data))
 	if err != nil {
-		return nil, fmt.Errorf("parse template: %w", err)
+		return nil, fmt.Errorf("Parse template: %w", err)
 	}
 
 	return &templateRenderer{tpl: tpl}, nil
@@ -39,7 +39,7 @@ func newTemplateRenderer(path string) (*templateRenderer, error) {
 func (r *templateRenderer) Render(snapshot model.ActSnapshot) ([]renderer.Block, error) {
 	var buf bytes.Buffer
 	if err := r.tpl.Execute(&buf, snapshot); err != nil {
-		return nil, fmt.Errorf("execute template: %w", err)
+		return nil, fmt.Errorf("Execute template: %w", err)
 	}
 	return renderer.ParseBlocks(buf.String())
 }

api/billing/documents/renderer/tags.go

@@ -79,7 +79,7 @@ func ParseBlocks(input string) ([]Block, error) {
 	}
 
 	if err := scanner.Err(); err != nil {
-		return nil, fmt.Errorf("parse blocks: %w", err)
+		return nil, fmt.Errorf("Parse blocks: %w", err)
 	}
 
 	flush()

api/billing/documents/storage/mongo/repository.go

@@ -42,13 +42,13 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Store, error) {
 	defer cancel()
 
 	if err := result.Ping(ctx); err != nil {
-		result.logger.Error("mongo ping failed during store init", zap.Error(err))
+		result.logger.Error("Mongo ping failed during store init", zap.Error(err))
 		return nil, err
 	}
 
 	documentsStore, err := store.NewDocuments(result.logger, database)
 	if err != nil {
-		result.logger.Error("failed to initialise documents store", zap.Error(err))
+		result.logger.Error("Failed to initialise documents store", zap.Error(err))
 		return nil, err
 	}
 	result.documents = documentsStore

api/billing/documents/storage/mongo/store/documents.go

@@ -38,13 +38,13 @@ func NewDocuments(logger mlogger.Logger, db *mongo.Database) (*Documents, error)
 
 	for _, def := range indexes {
 		if err := repo.CreateIndex(def); err != nil {
-			logger.Error("failed to ensure documents index", zap.Error(err), zap.String("collection", repo.Collection()))
+			logger.Error("Failed to ensure documents index", zap.Error(err), zap.String("collection", repo.Collection()))
 			return nil, err
 		}
 	}
 
 	childLogger := logger.Named("documents")
-	childLogger.Debug("documents store initialised")
+	childLogger.Debug("Documents store initialised")
 
 	return &Documents{
 		logger: childLogger,
@@ -68,7 +68,7 @@ func (d *Documents) Create(ctx context.Context, record *model.DocumentRecord) er
 		}
 		return err
 	}
-	d.logger.Debug("document record created", zap.String("payment_ref", record.PaymentRef))
+	d.logger.Debug("Document record created", zap.String("payment_ref", record.PaymentRef))
 	return nil
 }
 
@@ -124,7 +124,7 @@ func (d *Documents) ListByPaymentRefs(ctx context.Context, paymentRefs []string)
 	decoder := func(cur *mongo.Cursor) error {
 		var rec model.DocumentRecord
 		if err := cur.Decode(&rec); err != nil {
-			d.logger.Warn("failed to decode document record", zap.Error(err))
+			d.logger.Warn("Failed to decode document record", zap.Error(err))
 			return err
 		}
 		records = append(records, &rec)

api/billing/fees/go.mod

@@ -50,6 +50,6 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 	google.golang.org/protobuf v1.36.11
 )

api/billing/fees/go.sum

@@ -208,8 +208,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

api/billing/fees/internal/server/internal/serverimp.go

@@ -116,11 +116,11 @@ func (i *Imp) Start() error {
 			Insecure:    cfg.Oracle.InsecureTransport,
 		})
 		if err != nil {
-			i.logger.Warn("failed to initialise oracle client", zap.String("address", addr), zap.Error(err))
+			i.logger.Warn("Failed to initialise oracle client", zap.String("address", addr), zap.Error(err))
 		} else {
 			oracleClient = oc
 			i.oracleClient = oc
-			i.logger.Info("connected to oracle service", zap.String("address", addr))
+			i.logger.Info("Connected to oracle service", zap.String("address", addr))
 		}
 	}
 

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

@@ -94,7 +94,7 @@ func (c *quoteCalculator) Compute(ctx context.Context, plan *model.FeePlan, inte
 		amount, scale, calcErr := c.calculateRuleAmount(baseAmount, baseScale, rule)
 		if calcErr != nil {
 			if !errors.Is(calcErr, merrors.ErrInvalidArg) {
-				c.logger.Warn("failed to calculate fee rule amount", zap.String("rule_id", rule.RuleID), zap.Error(calcErr))
+				c.logger.Warn("Failed to calculate fee rule amount", zap.String("rule_id", rule.RuleID), zap.Error(calcErr))
 			}
 			continue
 		}
@@ -247,7 +247,7 @@ func (c *quoteCalculator) buildFxUsed(ctx context.Context, intent *feesv1.Intent
 		Provider: provider,
 	})
 	if err != nil {
-		c.logger.Warn("fees: failed to fetch FX context", zap.Error(err))
+		c.logger.Warn("Fees: failed to fetch FX context", zap.Error(err))
 		return nil
 	}
 	if snapshot == nil {

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

@@ -261,7 +261,7 @@ func (s *Service) PrecomputeFees(ctx context.Context, req *feesv1.PrecomputeFees
 
 	var token string
 	if token, err = encodeTokenPayload(payload); err != nil {
-		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
 	}
@@ -333,7 +333,7 @@ func (s *Service) ValidateFeeToken(ctx context.Context, req *feesv1.ValidateFeeT
 	payload, decodeErr := decodeTokenPayload(req.GetFeeQuoteToken())
 	if decodeErr != nil {
 		resultReason = "invalid_token"
-		logger.Warn("failed to decode fee quote token", zap.Error(decodeErr))
+		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
 	}
@@ -346,7 +346,7 @@ func (s *Service) ValidateFeeToken(ctx context.Context, req *feesv1.ValidateFeeT
 
 	if now.UnixMilli() > payload.ExpiresAtUnixMs {
 		resultReason = "expired"
-		logger.Info("fee quote token expired")
+		logger.Info("Fee quote token expired")
 		resp = &feesv1.ValidateFeeTokenResponse{Meta: &feesv1.ResponseMeta{}, Valid: false, Reason: "expired"}
 		return resp, nil
 	}
@@ -354,7 +354,7 @@ func (s *Service) ValidateFeeToken(ctx context.Context, req *feesv1.ValidateFeeT
 	orgRef, parseErr := bson.ObjectIDFromHex(payload.OrganizationRef)
 	if parseErr != nil {
 		resultReason = "invalid_token"
-		logger.Warn("token contained invalid organization reference", zap.Error(parseErr))
+		logger.Warn("Token contained invalid organization reference", zap.Error(parseErr))
 		resp = &feesv1.ValidateFeeTokenResponse{Meta: &feesv1.ResponseMeta{}, Valid: false, Reason: "invalid_token"}
 		return resp, nil
 	}
@@ -461,7 +461,7 @@ func (s *Service) computeQuoteWithTime(ctx context.Context, orgRef bson.ObjectID
 		if errors.Is(calcErr, merrors.ErrInvalidArg) {
 			return nil, nil, nil, status.Error(codes.InvalidArgument, calcErr.Error())
 		}
-		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/storage/mongo/repository.go

@@ -43,13 +43,13 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Store, error) {
 	defer cancel()
 
 	if err := result.Ping(ctx); err != nil {
-		result.logger.Error("mongo ping failed during store init", zap.Error(err))
+		result.logger.Error("Mongo ping failed during store init", zap.Error(err))
 		return nil, err
 	}
 
 	plansStore, err := store.NewPlans(result.logger, database)
 	if err != nil {
-		result.logger.Error("failed to initialise plans store", zap.Error(err))
+		result.logger.Error("Failed to initialise plans store", zap.Error(err))
 		return nil, err
 	}
 	result.plans = plansStore

api/billing/fees/storage/mongo/store/plans.go

@@ -40,7 +40,7 @@ func NewPlans(logger mlogger.Logger, db *mongo.Database) (storage.PlansStore, er
 		},
 	}
 	if err := repo.CreateIndex(orgIndex); err != nil {
-		logger.Error("failed to ensure fee plan organization index", zap.Error(err))
+		logger.Error("Failed to ensure fee plan organization index", zap.Error(err))
 		return nil, err
 	}
 
@@ -53,7 +53,7 @@ func NewPlans(logger mlogger.Logger, db *mongo.Database) (storage.PlansStore, er
 		Unique: true,
 	}
 	if err := repo.CreateIndex(uniqueIndex); err != nil {
-		logger.Error("failed to ensure fee plan uniqueness index", zap.Error(err))
+		logger.Error("Failed to ensure fee plan uniqueness index", zap.Error(err))
 		return nil, err
 	}
 
@@ -67,7 +67,7 @@ func NewPlans(logger mlogger.Logger, db *mongo.Database) (storage.PlansStore, er
 		},
 	}
 	if err := repo.CreateIndex(activeIndex); err != nil {
-		logger.Warn("failed to ensure fee plan active index", zap.Error(err))
+		logger.Warn("Failed to ensure fee plan active index", zap.Error(err))
 	}
 
 	return &plansStore{
@@ -88,7 +88,7 @@ func (p *plansStore) Create(ctx context.Context, plan *model.FeePlan) error {
 		if errors.Is(err, merrors.ErrDataConflict) {
 			return storage.ErrDuplicateFeePlan
 		}
-		p.logger.Warn("failed to create fee plan", zap.Error(err))
+		p.logger.Warn("Failed to create fee plan", zap.Error(err))
 		return err
 	}
 	return nil
@@ -106,7 +106,7 @@ func (p *plansStore) Update(ctx context.Context, plan *model.FeePlan) error {
 	}
 
 	if err := p.repo.Update(ctx, plan); err != nil {
-		p.logger.Warn("failed to update fee plan", zap.Error(err))
+		p.logger.Warn("Failed to update fee plan", zap.Error(err))
 		return err
 	}
 	return nil

api/discovery/go.mod

@@ -43,7 +43,7 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 	google.golang.org/grpc v1.79.1 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 )

api/discovery/go.sum

@@ -208,8 +208,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

api/fx/ingestor/config.dev.yml

@@ -19,10 +19,10 @@ market:
         quote: "EUR"
         symbol: "EURUSDT"
         invert: true
-      - base: "USD"
+      - base: "USDT"
-        quote: "USDT"
+        quote: "USD"
         symbol: "USDTUSD"
-        invert: true
+        invert: false
       - base: "UAH"
         quote: "USDT"
         symbol: "USDTUAH"

api/fx/ingestor/go.mod

@@ -47,7 +47,7 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 	google.golang.org/grpc v1.79.1 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 )

api/fx/ingestor/go.sum

@@ -208,8 +208,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

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

@@ -49,11 +49,6 @@ const (
 	defaultRequestTimeout        = 10 * time.Second
 )
 
-const (
-	maxSymbolParts = 2
-	isoCodeLen     = 3
-)
-
 func NewConnector(logger mlogger.Logger, settings model.SettingsT) (mmodel.Connector, error) { //nolint:cyclop,funlen,nestif,ireturn
 	baseURL := defaultCBRBaseURL
 	provider := strings.ToLower(mmodel.DriverCBR.String())

api/fx/oracle/go.mod

@@ -48,5 +48,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 )

api/fx/oracle/go.sum

@@ -208,8 +208,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

api/gateway/chain/go.mod

@@ -4,14 +4,17 @@ go 1.25.7
 
 replace github.com/tech/sendico/pkg => ../../pkg
 
+replace github.com/tech/sendico/gateway/common => ../common
+
 require (
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0
-	github.com/ethereum/go-ethereum v1.16.8
+	github.com/ethereum/go-ethereum v1.17.0
 	github.com/hashicorp/vault/api v1.22.0
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/prometheus/client_golang v1.23.2
 	github.com/shopspring/decimal v1.4.0
 	github.com/stretchr/testify v1.11.1
+	github.com/tech/sendico/gateway/common v0.1.0
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver/v2 v2.5.0
 	go.uber.org/zap v1.27.1
@@ -22,7 +25,7 @@ require (
 
 require (
 	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260213131322-086e44a26cf3 // indirect
+	github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260215031811-a0ab0b218a81 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bits-and-blooms/bitset v1.24.4 // indirect
 	github.com/bmatcuk/doublestar/v4 v4.10.0 // indirect
@@ -33,13 +36,13 @@ require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/consensys/gnark-crypto v0.19.2 // indirect
 	github.com/crate-crypto/go-eth-kzg v1.5.0 // indirect
-	github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/deckarep/golang-set/v2 v2.8.0 // indirect
 	github.com/ethereum/c-kzg-4844/v2 v2.1.5 // indirect
-	github.com/ethereum/go-verkle v0.2.2 // indirect
 	github.com/go-chi/chi/v5 v5.2.5 // indirect
 	github.com/go-jose/go-jose/v4 v4.1.3 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
@@ -75,6 +78,10 @@ require (
 	github.com/xdg-go/stringprep v1.0.4 // indirect
 	github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/otel v1.40.0 // indirect
+	go.opentelemetry.io/otel/metric v1.40.0 // indirect
+	go.opentelemetry.io/otel/trace v1.40.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	golang.org/x/crypto v0.48.0 // indirect
@@ -84,5 +91,5 @@ require (
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
 	golang.org/x/time v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // 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 v0.0.0-20260213131322-086e44a26cf3 h1:QD30TjDPWtvXb5PBZGZ6Wdvaq7HQixIBtZ/yuseNXc8=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260215031811-a0ab0b218a81 h1:TBzelXBdnzDy+HCrBMcomEnhrmigkWOI1/mIPCi2u4M=
-github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260213131322-086e44a26cf3/go.mod h1:ioLG6R+5bUSO1oeGSDxOV3FADARuMoytZCSX6MEMQkI=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260215031811-a0ab0b218a81/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=
@@ -52,8 +52,6 @@ github.com/cpuguy83/go-md2man/v2 v2.0.5 h1:ZtcqGrnekaHpVLArFSe4HK5DoKx1T0rq2DwVB
 github.com/cpuguy83/go-md2man/v2 v2.0.5/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/crate-crypto/go-eth-kzg v1.5.0 h1:FYRiJMJG2iv+2Dy3fi14SVGjcPteZ5HAAUe4YWlJygc=
 github.com/crate-crypto/go-eth-kzg v1.5.0/go.mod h1:J9/u5sWfznSObptgfa92Jq8rTswn6ahQWEuiLHOjCUI=
-github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a h1:W8mUrRp6NOVl3J+MYp5kPMoUZPp7aOYHtaua31lwRHg=
-github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a/go.mod h1:sTwzHBvIzm2RfVCGNEBZgRyjwK40bVoun3ZnGOCafNM=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dchest/siphash v1.2.3 h1:QXwFc8cFOR2dSa/gE6o/HokBMWtLUaNDVd+22aKHeEA=
@@ -78,10 +76,8 @@ github.com/ethereum/c-kzg-4844/v2 v2.1.5 h1:aVtoLK5xwJ6c5RiqO8g8ptJ5KU+2Hdquf6G3
 github.com/ethereum/c-kzg-4844/v2 v2.1.5/go.mod h1:u59hRTTah4Co6i9fDWtiCjTrblJv0UwsqZKCc0GfgUs=
 github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab h1:rvv6MJhy07IMfEKuARQ9TKojGqLVNxQajaXEp/BoqSk=
 github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab/go.mod h1:IuLm4IsPipXKF7CW5Lzf68PIbZ5yl7FFd74l/E0o9A8=
-github.com/ethereum/go-ethereum v1.16.8 h1:LLLfkZWijhR5m6yrAXbdlTeXoqontH+Ga2f9igY7law=
+github.com/ethereum/go-ethereum v1.17.0 h1:2D+1Fe23CwZ5tQoAS5DfwKFNI1HGcTwi65/kRlAVxes=
-github.com/ethereum/go-ethereum v1.16.8/go.mod h1:Fs6QebQbavneQTYcA39PEKv2+zIjX7rPUZ14DER46wk=
+github.com/ethereum/go-ethereum v1.17.0/go.mod h1:2W3msvdosS/MCWytpqTcqgFiRYbTH59FxDJzqah120o=
-github.com/ethereum/go-verkle v0.2.2 h1:I2W0WjnrFUIzzVPwm8ykY+7pL2d4VhlsePn4j7cnFk8=
-github.com/ethereum/go-verkle v0.2.2/go.mod h1:M3b90YRnzqKyyzBEWJGqj8Qff4IDeXnzFw0P9bFw3uk=
 github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
 github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
 github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
@@ -94,6 +90,7 @@ github.com/go-chi/chi/v5 v5.2.5 h1:Eg4myHZBjyvJmAFjFvWgrqDTXFyOzjj7YIm3L3mu6Ug=
 github.com/go-chi/chi/v5 v5.2.5/go.mod h1:X7Gx4mteadT3eDOMTsXzmI4/rwUpOwBHLpAfupzFJP0=
 github.com/go-jose/go-jose/v4 v4.1.3 h1:CVLmWDhDVRa6Mi/IgCgaopNosCaHz7zrMeF9MlZRkrs=
 github.com/go-jose/go-jose/v4 v4.1.3/go.mod h1:x4oUasVrzR7071A4TnHLGSPpNOm2a21K9Kf04k1rs08=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
 github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
@@ -124,6 +121,10 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/grafana/pyroscope-go v1.2.7 h1:VWBBlqxjyR0Cwk2W6UrE8CdcdD80GOFNutj0Kb1T8ac=
+github.com/grafana/pyroscope-go v1.2.7/go.mod h1:o/bpSLiJYYP6HQtvcoVKiE9s5RiNgjYTj1DhiddP2Pc=
+github.com/grafana/pyroscope-go/godeltaprof v0.1.9 h1:c1Us8i6eSmkW+Ez05d3co8kasnuOY813tbMN8i/a3Og=
+github.com/grafana/pyroscope-go/godeltaprof v0.1.9/go.mod h1:2+l7K7twW49Ct4wFluZD3tZ6e0SjanjcUUBPVD/UuGU=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY2I=
 github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
@@ -179,8 +180,6 @@ github.com/mattn/go-colorable v0.1.14 h1:9A9LHSqF/7dyVVX6g0U9cwm9pG3kP9gSzcuIPHP
 github.com/mattn/go-colorable v0.1.14/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stgPZH1UqBm1s8=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU=
-github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/minio/sha256-simd v1.0.0 h1:v1ta+49hkWZyvaKwrQB8elexRqm6Y0aMLjCNsrYxo6g=
 github.com/minio/sha256-simd v1.0.0/go.mod h1:OuYzVNI5vcoYIAmbIvHPl3N3jUzVedXbKy5RFepssQM=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
@@ -211,8 +210,6 @@ github.com/nats-io/nkeys v0.4.15 h1:JACV5jRVO9V856KOapQ7x+EY8Jo3qw1vJt/9Jpwzkk4=
 github.com/nats-io/nkeys v0.4.15/go.mod h1:CpMchTXC9fxA5zrMo4KpySxNjiDVvr8ANOSZdiNfUrs=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
-github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
-github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.1.0 h1:8SG7/vwALn54lVB/0yZ/MMwhFrPYtpEHQb2IpWsCzug=
@@ -241,10 +238,8 @@ github.com/prometheus/common v0.67.5 h1:pIgK94WWlQt1WLwAC5j2ynLaBRDiinoAb86HZHTU
 github.com/prometheus/common v0.67.5/go.mod h1:SjE/0MzDEEAyrdr5Gqc6G+sXI67maCxzaT3A2+HqjUw=
 github.com/prometheus/procfs v0.19.2 h1:zUMhqEW66Ex7OXIiDkll3tl9a1ZdilUOd/F6ZXw4Vws=
 github.com/prometheus/procfs v0.19.2/go.mod h1:M0aotyiemPhBCM0z5w87kL22CxfcH05ZpYlu+b4J7mw=
-github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
-github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
-github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
-github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/rs/cors v1.7.0 h1:+88SsELBHx5r+hZ8TCkggzSstaWNbDvThkVK8H6f9ik=
 github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
@@ -298,16 +293,16 @@ go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ
 go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0 h1:UP6IpuHFkUgOQL9FFQFrZ+5LiwhhYRbi7VZSIx6Nj5s=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0/go.mod h1:qxuZLtbq5QDtdeSHsS7bcf6EH6uO6jUAgk764zd3rhM=
-go.opentelemetry.io/otel v1.39.0 h1:8yPrr/S0ND9QEfTfdP9V+SiwT4E0G7Y5MO7p85nis48=
+go.opentelemetry.io/otel v1.40.0 h1:oA5YeOcpRTXq6NN7frwmwFR0Cn3RhTVZvXsP4duvCms=
-go.opentelemetry.io/otel v1.39.0/go.mod h1:kLlFTywNWrFyEdH0oj2xK0bFYZtHRYUdv1NklR/tgc8=
+go.opentelemetry.io/otel v1.40.0/go.mod h1:IMb+uXZUKkMXdPddhwAHm6UfOwJyh4ct1ybIlV14J0g=
-go.opentelemetry.io/otel/metric v1.39.0 h1:d1UzonvEZriVfpNKEVmHXbdf909uGTOQjA0HF0Ls5Q0=
+go.opentelemetry.io/otel/metric v1.40.0 h1:rcZe317KPftE2rstWIBitCdVp89A2HqjkxR3c11+p9g=
-go.opentelemetry.io/otel/metric v1.39.0/go.mod h1:jrZSWL33sD7bBxg1xjrqyDjnuzTUB0x1nBERXd7Ftcs=
+go.opentelemetry.io/otel/metric v1.40.0/go.mod h1:ib/crwQH7N3r5kfiBZQbwrTge743UDc7DTFVZrrXnqc=
 go.opentelemetry.io/otel/sdk v1.39.0 h1:nMLYcjVsvdui1B/4FRkwjzoRVsMK8uL/cj0OyhKzt18=
 go.opentelemetry.io/otel/sdk v1.39.0/go.mod h1:vDojkC4/jsTJsE+kh+LXYQlbL8CgrEcwmt1ENZszdJE=
 go.opentelemetry.io/otel/sdk/metric v1.39.0 h1:cXMVVFVgsIf2YL6QkRF4Urbr/aMInf+2WKg+sEJTtB8=
 go.opentelemetry.io/otel/sdk/metric v1.39.0/go.mod h1:xq9HEVH7qeX69/JnwEfp6fVq5wosJsY1mt4lLfYdVew=
-go.opentelemetry.io/otel/trace v1.39.0 h1:2d2vfpEDmCJ5zVYz7ijaJdOF59xLomrvj7bjt6/qCJI=
+go.opentelemetry.io/otel/trace v1.40.0 h1:WA4etStDttCSYuhwvEa8OP8I5EWu24lkOzp+ZYblVjw=
-go.opentelemetry.io/otel/trace v1.39.0/go.mod h1:88w4/PnZSazkGzz/w84VHpQafiU4EtqqlVdxWy+rNOA=
+go.opentelemetry.io/otel/trace v1.40.0/go.mod h1:zeAhriXecNGP/s2SEG3+Y8X9ujcJOTqQ5RgdEJcawiA=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
@@ -360,8 +355,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

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

@@ -162,6 +162,9 @@ func (i *Imp) Start() error {
 			gatewayservice.WithDriverRegistry(driverRegistry),
 			gatewayservice.WithSettings(cfg.Settings),
 		}
+		if cfg.Messaging != nil {
+			opts = append(opts, gatewayservice.WithMessagingSettings(cfg.Messaging.Settings))
+		}
 		svc := gatewayservice.NewService(logger, repo, producer, opts...)
 		i.service = svc
 		return svc, nil

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

@@ -91,3 +91,12 @@ func WithDiscoveryInvokeURI(invokeURI string) Option {
 		s.invokeURI = strings.TrimSpace(invokeURI)
 	}
 }
+
+// WithMessagingSettings applies messaging driver settings.
+func WithMessagingSettings(settings pmodel.SettingsT) Option {
+	return func(s *Service) {
+		if settings != nil {
+			s.msgCfg = settings
+		}
+	}
+}

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

@@ -0,0 +1,47 @@
+package gateway
+
+import (
+	"context"
+
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
+	"github.com/tech/sendico/pkg/db/transaction"
+	me "github.com/tech/sendico/pkg/messaging/envelope"
+)
+
+type chainOutboxProvider interface {
+	Outbox() gatewayoutbox.Store
+}
+
+type chainTransactionProvider interface {
+	TransactionFactory() transaction.Factory
+}
+
+func (s *Service) outboxStore() gatewayoutbox.Store {
+	provider, ok := s.storage.(chainOutboxProvider)
+	if !ok || provider == nil {
+		return nil
+	}
+	return provider.Outbox()
+}
+
+func (s *Service) startOutboxReliableProducer() error {
+	if s == nil || s.storage == nil {
+		return nil
+	}
+	return s.outbox.Start(s.logger, s.producer, s.outboxStore(), s.msgCfg)
+}
+
+func (s *Service) sendWithOutbox(ctx context.Context, env me.Envelope) error {
+	if err := s.startOutboxReliableProducer(); err != nil {
+		return err
+	}
+	return s.outbox.Send(ctx, env)
+}
+
+func (s *Service) executeTransaction(ctx context.Context, cb transaction.Callback) (any, error) {
+	provider, ok := s.storage.(chainTransactionProvider)
+	if !ok || provider == nil || provider.TransactionFactory() == nil {
+		return cb(ctx)
+	}
+	return provider.TransactionFactory().CreateTransaction().Execute(ctx, cb)
+}

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

@@ -12,6 +12,7 @@ import (
 	"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"
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/pkg/api/routers"
 	"github.com/tech/sendico/pkg/api/routers/gsresponse"
 	clockpkg "github.com/tech/sendico/pkg/clock"
@@ -22,6 +23,7 @@ import (
 	"github.com/tech/sendico/pkg/mservice"
 	connectorv1 "github.com/tech/sendico/pkg/proto/connector/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
+	"go.uber.org/zap"
 	"google.golang.org/grpc"
 )
 
@@ -40,9 +42,11 @@ type Service struct {
 	logger   mlogger.Logger
 	storage  storage.Repository
 	producer msg.Producer
+	msgCfg   pmodel.SettingsT
 	clock    clockpkg.Clock
 
 	settings CacheSettings
+	outbox   gatewayoutbox.ReliableRuntime
 
 	networks        map[pmodel.ChainNetwork]shared.Network
 	serviceWallet   shared.ServiceWallet
@@ -63,6 +67,7 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 		logger:   logger.Named("service"),
 		storage:  repo,
 		producer: producer,
+		msgCfg:   map[string]any{},
 		clock:    clockpkg.System{},
 		settings: defaultSettings(),
 		networks: map[pmodel.ChainNetwork]shared.Network{},
@@ -84,6 +89,9 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 	}
 	svc.settings = svc.settings.withDefaults()
 	svc.networkRegistry = rpcclient.NewRegistry(svc.networks, svc.rpcClients)
+	if err := svc.startOutboxReliableProducer(); err != nil {
+		svc.logger.Warn("Failed to initialise outbox reliable producer", zap.Error(err))
+	}
 
 	svc.commands = commands.NewRegistry(commands.RegistryDeps{
 		Wallet:   commandsWalletDeps(svc),
@@ -105,6 +113,7 @@ func (s *Service) Shutdown() {
 	if s == nil {
 		return
 	}
+	s.outbox.Stop()
 	for _, announcer := range s.announcers {
 		if announcer != nil {
 			announcer.Stop()

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

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"github.com/tech/sendico/gateway/chain/storage/model"
+	"github.com/tech/sendico/pkg/merrors"
 	paymentgateway "github.com/tech/sendico/pkg/messaging/notifications/paymentgateway"
 	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
@@ -13,6 +14,9 @@ import (
 )
 
 func isFinalStatus(t *model.Transfer) bool {
+	if t == nil {
+		return false
+	}
 	switch t.Status {
 	case model.TransferStatusFailed, model.TransferStatusSuccess, model.TransferStatusCancelled:
 		return true
@@ -21,16 +25,25 @@ func isFinalStatus(t *model.Transfer) bool {
 	}
 }
 
-func toOpStatus(t *model.Transfer) rail.OperationResult {
+func isFinalTransferStatus(status model.TransferStatus) bool {
+	switch status {
+	case model.TransferStatusFailed, model.TransferStatusSuccess, model.TransferStatusCancelled:
+		return true
+	default:
+		return false
+	}
+}
+
+func toOpStatus(t *model.Transfer) (rail.OperationResult, error) {
 	switch t.Status {
 	case model.TransferStatusFailed:
-		return rail.OperationResultFailed
+		return rail.OperationResultFailed, nil
 	case model.TransferStatusSuccess:
-		return rail.OperationResultSuccess
+		return rail.OperationResultSuccess, nil
 	case model.TransferStatusCancelled:
-		return rail.OperationResultCancelled
+		return rail.OperationResultCancelled, nil
 	default:
-		panic(fmt.Sprintf("toOpStatus: unexpected transfer status: %s", t.Status))
+		return rail.OperationResultFailed, merrors.InvalidArgument(fmt.Sprintf("unexpected transfer status: %s", t.Status), "transfer.status")
 	}
 }
 
@@ -45,19 +58,47 @@ func toError(t *model.Transfer) string {
 }
 
 func (s *Service) updateTransferStatus(ctx context.Context, transferRef string, status model.TransferStatus, failureReason, txHash string) (*model.Transfer, error) {
-	transfer, err := s.storage.Transfers().UpdateStatus(ctx, transferRef, status, failureReason, txHash)
+	if !isFinalTransferStatus(status) {
+		transfer, err := s.storage.Transfers().UpdateStatus(ctx, transferRef, status, failureReason, txHash)
+		if err != nil {
+			s.logger.Warn("Failed to update transfer status", zap.String("transfer_ref", transferRef), zap.String("status", string(status)), zap.Error(err))
+		}
+		return transfer, err
+	}
+
+	res, err := s.executeTransaction(ctx, func(txCtx context.Context) (any, error) {
+		transfer, statusErr := s.storage.Transfers().UpdateStatus(txCtx, transferRef, status, failureReason, txHash)
+		if statusErr != nil {
+			return nil, statusErr
+		}
+		if isFinalStatus(transfer) {
+			if emitErr := s.emitTransferStatusEvent(txCtx, transfer); emitErr != nil {
+				return nil, emitErr
+			}
+		}
+		return transfer, nil
+	})
 	if err != nil {
 		s.logger.Warn("Failed to update transfer status", zap.String("transfer_ref", transferRef), zap.String("status", string(status)), zap.Error(err))
+		return nil, err
 	}
-	if isFinalStatus(transfer) {
+
-		s.emitTransferStatusEvent(transfer)
+	transfer, _ := res.(*model.Transfer)
-	}
+	return transfer, nil
-	return transfer, err
 }
 
-func (s *Service) emitTransferStatusEvent(transfer *model.Transfer) {
+func (s *Service) emitTransferStatusEvent(ctx context.Context, transfer *model.Transfer) error {
-	if s == nil || s.producer == nil || transfer == nil {
+	if s == nil || transfer == nil {
-		return
+		return nil
+	}
+	if s.producer == nil || s.outboxStore() == nil {
+		return nil
+	}
+
+	status, err := toOpStatus(transfer)
+	if err != nil {
+		s.logger.Warn("Failed to map transfer status for transfer status event", zap.Error(err), zap.String("transfer_ref", transfer.TransferRef))
+		return err
 	}
 
 	exec := pmodel.PaymentGatewayExecution{
@@ -65,13 +106,15 @@ func (s *Service) emitTransferStatusEvent(transfer *model.Transfer) {
 		IdempotencyKey:  transfer.IdempotencyKey,
 		ExecutedMoney:   transfer.NetAmount,
 		PaymentRef:      transfer.PaymentRef,
-		Status:          toOpStatus(transfer),
+		Status:          status,
 		OperationRef:    transfer.OperationRef,
 		Error:           toError(transfer),
 		TransferRef:     transfer.TransferRef,
 	}
 	env := paymentgateway.PaymentGatewayExecution(mservice.ChainGateway, &exec)
-	if err := s.producer.SendMessage(env); err != nil {
+	if err := s.sendWithOutbox(ctx, env); err != nil {
 		s.logger.Warn("Failed to publish transfer status event", zap.Error(err), zap.String("transfer_ref", transfer.TransferRef))
+		return err
 	}
+	return nil
 }

api/gateway/chain/storage/mongo/repository.go

@@ -6,7 +6,9 @@ import (
 
 	"github.com/tech/sendico/gateway/chain/storage"
 	"github.com/tech/sendico/gateway/chain/storage/mongo/store"
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/pkg/db"
+	"github.com/tech/sendico/pkg/db/transaction"
 	"github.com/tech/sendico/pkg/merrors"
 	"github.com/tech/sendico/pkg/mlogger"
 	"go.mongodb.org/mongo-driver/v2/mongo"
@@ -15,13 +17,15 @@ import (
 
 // Store implements storage.Repository backed by MongoDB.
 type Store struct {
-	logger mlogger.Logger
+	logger    mlogger.Logger
-	conn   *db.MongoConnection
+	conn      *db.MongoConnection
-	db     *mongo.Database
+	db        *mongo.Database
+	txFactory transaction.Factory
 
 	wallets   storage.WalletsStore
 	transfers storage.TransfersStore
 	deposits  storage.DepositsStore
+	outbox    gatewayoutbox.Store
 }
 
 // New creates a new Mongo-backed repository.
@@ -35,9 +39,10 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Store, error) {
 	}
 
 	result := &Store{
-		logger: logger.Named("storage").Named("mongo"),
+		logger:    logger.Named("storage").Named("mongo"),
-		conn:   conn,
+		conn:      conn,
-		db:     conn.Database(),
+		db:        conn.Database(),
+		txFactory: newMongoTransactionFactory(client),
 	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
@@ -63,10 +68,16 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Store, error) {
 		result.logger.Error("Failed to initialise deposits store", zap.Error(err))
 		return nil, err
 	}
+	outboxStore, err := gatewayoutbox.NewMongoStore(result.logger, result.db)
+	if err != nil {
+		result.logger.Error("Failed to initialise outbox store", zap.Error(err))
+		return nil, err
+	}
 
 	result.wallets = walletsStore
 	result.transfers = transfersStore
 	result.deposits = depositsStore
+	result.outbox = outboxStore
 
 	result.logger.Info("Chain gateway MongoDB storage initialised")
 	return result, nil
@@ -95,4 +106,12 @@ func (s *Store) Deposits() storage.DepositsStore {
 	return s.deposits
 }
 
+func (s *Store) Outbox() gatewayoutbox.Store {
+	return s.outbox
+}
+
+func (s *Store) TransactionFactory() transaction.Factory {
+	return s.txFactory
+}
+
 var _ storage.Repository = (*Store)(nil)

api/gateway/chain/storage/mongo/transaction.go

@@ -0,0 +1,38 @@
+package mongo
+
+import (
+	"context"
+
+	"github.com/tech/sendico/pkg/db/transaction"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+)
+
+type mongoTransactionFactory struct {
+	client *mongo.Client
+}
+
+func (f *mongoTransactionFactory) CreateTransaction() transaction.Transaction {
+	return &mongoTransaction{client: f.client}
+}
+
+type mongoTransaction struct {
+	client *mongo.Client
+}
+
+func (t *mongoTransaction) Execute(ctx context.Context, cb transaction.Callback) (any, error) {
+	session, err := t.client.StartSession()
+	if err != nil {
+		return nil, err
+	}
+	defer session.EndSession(ctx)
+
+	run := func(sessCtx context.Context) (any, error) {
+		return cb(sessCtx)
+	}
+
+	return session.WithTransaction(ctx, run)
+}
+
+func newMongoTransactionFactory(client *mongo.Client) transaction.Factory {
+	return &mongoTransactionFactory{client: client}
+}

api/gateway/common/go.mod

@@ -0,0 +1,30 @@
+module github.com/tech/sendico/gateway/common
+
+go 1.25.7
+
+replace github.com/tech/sendico/pkg => ../../pkg
+
+require (
+	github.com/tech/sendico/pkg v0.1.0
+	go.mongodb.org/mongo-driver/v2 v2.5.0
+	go.uber.org/zap v1.27.1
+)
+
+require (
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.18.4 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
+	github.com/nats-io/nkeys v0.4.15 // indirect
+	github.com/nats-io/nuid v1.0.1 // indirect
+	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
+	github.com/xdg-go/scram v1.2.0 // indirect
+	github.com/xdg-go/stringprep v1.0.4 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/crypto v0.48.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/sys v0.41.0 // indirect
+	golang.org/x/text v0.34.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+)

api/gateway/common/go.sum

@@ -0,0 +1,158 @@
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+golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
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+golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
+golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
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api/gateway/common/outbox/model.go

@@ -0,0 +1,33 @@
+package outbox
+
+import (
+	"time"
+
+	"github.com/tech/sendico/pkg/db/storable"
+)
+
+const Collection = "outbox"
+
+type Status string
+
+const (
+	StatusPending Status = "pending"
+	StatusSent    Status = "sent"
+	StatusFailed  Status = "failed"
+)
+
+// Event represents an outbox message pending dispatch to the broker.
+type Event struct {
+	storable.Base `bson:",inline" json:",inline"`
+
+	EventID  string     `bson:"eventId" json:"eventId"`
+	Subject  string     `bson:"subject" json:"subject"`
+	Payload  []byte     `bson:"payload" json:"payload"`
+	Status   Status     `bson:"status" json:"status"`
+	Attempts int        `bson:"attempts" json:"attempts"`
+	SentAt   *time.Time `bson:"sentAt,omitempty" json:"sentAt,omitempty"`
+}
+
+func (*Event) Collection() string {
+	return Collection
+}

api/gateway/common/outbox/mongo_store.go

@@ -0,0 +1,123 @@
+package outbox
+
+import (
+	"context"
+	"time"
+
+	"github.com/tech/sendico/pkg/db/repository"
+	ri "github.com/tech/sendico/pkg/db/repository/index"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.uber.org/zap"
+)
+
+type mongoStore struct {
+	logger mlogger.Logger
+	repo   repository.Repository
+}
+
+func NewMongoStore(logger mlogger.Logger, db *mongo.Database) (Store, error) {
+	if db == nil {
+		return nil, merrors.InvalidArgument("mongo database is nil")
+	}
+	if logger == nil {
+		logger = zap.NewNop()
+	}
+	repo := repository.CreateMongoRepository(db, Collection)
+
+	statusIndex := &ri.Definition{
+		Keys: []ri.Key{{Field: "status", Sort: ri.Asc}, {Field: "createdAt", Sort: ri.Asc}},
+	}
+	if err := repo.CreateIndex(statusIndex); err != nil {
+		logger.Error("Failed to ensure outbox status index", zap.Error(err))
+		return nil, err
+	}
+
+	eventIDIndex := &ri.Definition{
+		Keys:   []ri.Key{{Field: "eventId", Sort: ri.Asc}},
+		Unique: true,
+	}
+	if err := repo.CreateIndex(eventIDIndex); err != nil {
+		logger.Error("Failed to ensure outbox eventId index", zap.Error(err))
+		return nil, err
+	}
+
+	childLogger := logger.Named(Collection)
+	childLogger.Debug("Outbox store initialised", zap.String("collection", Collection))
+
+	return &mongoStore{logger: childLogger, repo: repo}, nil
+}
+
+func (o *mongoStore) Create(ctx context.Context, event *Event) error {
+	if event == nil {
+		o.logger.Warn("Attempt to create nil outbox event")
+		return merrors.InvalidArgument("outbox: nil event")
+	}
+
+	if err := o.repo.Insert(ctx, event, nil); err != nil {
+		if mongo.IsDuplicateKeyError(err) {
+			o.logger.Warn("Duplicate outbox event id", zap.String("event_id", event.EventID))
+			return merrors.DataConflict("outbox event with this id already exists")
+		}
+		o.logger.Warn("Failed to create outbox event", zap.Error(err))
+		return err
+	}
+
+	o.logger.Debug("Outbox event created", zap.String("event_id", event.EventID), zap.String("subject", event.Subject))
+	return nil
+}
+
+func (o *mongoStore) ListPending(ctx context.Context, limit int) ([]*Event, error) {
+	limit64 := int64(limit)
+	query := repository.Query().
+		Filter(repository.Field("status"), StatusPending).
+		Limit(&limit64).
+		Sort(repository.Field("createdAt"), true)
+
+	events := make([]*Event, 0)
+	err := o.repo.FindManyByFilter(ctx, query, func(cur *mongo.Cursor) error {
+		doc := &Event{}
+		if err := cur.Decode(doc); err != nil {
+			return err
+		}
+		events = append(events, doc)
+		return nil
+	})
+	if err != nil {
+		o.logger.Warn("Failed to list pending outbox events", zap.Error(err))
+		return nil, err
+	}
+
+	return events, nil
+}
+
+func (o *mongoStore) MarkSent(ctx context.Context, eventRef bson.ObjectID, sentAt time.Time) error {
+	if eventRef.IsZero() {
+		return merrors.InvalidArgument("outbox: zero event id")
+	}
+
+	patch := repository.Patch().
+		Set(repository.Field("status"), StatusSent).
+		Set(repository.Field("sentAt"), sentAt)
+	return o.repo.Patch(ctx, eventRef, patch)
+}
+
+func (o *mongoStore) MarkFailed(ctx context.Context, eventRef bson.ObjectID) error {
+	if eventRef.IsZero() {
+		return merrors.InvalidArgument("outbox: zero event id")
+	}
+
+	patch := repository.Patch().Set(repository.Field("status"), StatusFailed)
+	return o.repo.Patch(ctx, eventRef, patch)
+}
+
+func (o *mongoStore) IncrementAttempts(ctx context.Context, eventRef bson.ObjectID) error {
+	if eventRef.IsZero() {
+		return merrors.InvalidArgument("outbox: zero event id")
+	}
+
+	patch := repository.Patch().Inc(repository.Field("attempts"), 1)
+	return o.repo.Patch(ctx, eventRef, patch)
+}

api/gateway/common/outbox/reliable_adapter.go

@@ -0,0 +1,108 @@
+package outbox
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	pmessaging "github.com/tech/sendico/pkg/messaging"
+	pmessagingreliable "github.com/tech/sendico/pkg/messaging/reliable"
+	"github.com/tech/sendico/pkg/mlogger"
+	cfgmodel "github.com/tech/sendico/pkg/model"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+type reliableStoreAdapter struct {
+	store Store
+}
+
+func NewReliableProducer(logger mlogger.Logger, direct pmessaging.Producer, store Store, messagingSettings cfgmodel.SettingsT, opts ...pmessagingreliable.Option) (*pmessagingreliable.ReliableProducer, pmessagingreliable.Settings, error) {
+	if store == nil {
+		return nil, pmessagingreliable.DefaultSettings(), nil
+	}
+	producer, settings, err := pmessagingreliable.NewReliableProducerFromConfig(logger, direct, &reliableStoreAdapter{store: store}, messagingSettings, opts...)
+	if err != nil {
+		return nil, pmessagingreliable.Settings{}, err
+	}
+	return producer, settings, nil
+}
+
+func (a *reliableStoreAdapter) Enqueue(ctx context.Context, msg pmessagingreliable.OutboxMessage) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	return a.store.Create(ctx, &Event{
+		EventID:  strings.TrimSpace(msg.EventID),
+		Subject:  strings.TrimSpace(msg.Subject),
+		Payload:  append([]byte(nil), msg.Payload...),
+		Status:   StatusPending,
+		Attempts: msg.Attempts,
+	})
+}
+
+func (a *reliableStoreAdapter) ListPending(ctx context.Context, limit int) ([]pmessagingreliable.OutboxMessage, error) {
+	if a == nil || a.store == nil {
+		return nil, nil
+	}
+	events, err := a.store.ListPending(ctx, limit)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make([]pmessagingreliable.OutboxMessage, 0, len(events))
+	for _, event := range events {
+		if event == nil {
+			continue
+		}
+		reference := ""
+		if eventRef := event.GetID(); eventRef != nil && !eventRef.IsZero() {
+			reference = eventRef.Hex()
+		}
+		result = append(result, pmessagingreliable.OutboxMessage{
+			Reference: reference,
+			EventID:   strings.TrimSpace(event.EventID),
+			Subject:   strings.TrimSpace(event.Subject),
+			Payload:   append([]byte(nil), event.Payload...),
+			Attempts:  event.Attempts,
+			CreatedAt: event.CreatedAt,
+		})
+	}
+	return result, nil
+}
+
+func (a *reliableStoreAdapter) MarkSent(ctx context.Context, reference string, sentAt time.Time) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	eventRef, err := parseObjectID(strings.TrimSpace(reference))
+	if err != nil {
+		return err
+	}
+	return a.store.MarkSent(ctx, eventRef, sentAt)
+}
+
+func (a *reliableStoreAdapter) MarkFailed(ctx context.Context, reference string) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	eventRef, err := parseObjectID(strings.TrimSpace(reference))
+	if err != nil {
+		return err
+	}
+	return a.store.MarkFailed(ctx, eventRef)
+}
+
+func (a *reliableStoreAdapter) IncrementAttempts(ctx context.Context, reference string) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	eventRef, err := parseObjectID(strings.TrimSpace(reference))
+	if err != nil {
+		return err
+	}
+	return a.store.IncrementAttempts(ctx, eventRef)
+}
+
+func parseObjectID(raw string) (bson.ObjectID, error) {
+	return bson.ObjectIDFromHex(raw)
+}

api/gateway/common/outbox/reliable_adapter_integration_test.go

@@ -0,0 +1,330 @@
+package outbox
+
+import (
+	"context"
+	"errors"
+	"sort"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	me "github.com/tech/sendico/pkg/messaging/envelope"
+	pmessagingreliable "github.com/tech/sendico/pkg/messaging/reliable"
+	domainmodel "github.com/tech/sendico/pkg/model"
+	notification "github.com/tech/sendico/pkg/model/notification"
+	"github.com/tech/sendico/pkg/mservice"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.uber.org/zap"
+)
+
+func TestGatewayReliableProducerPersistsAndRetriesOnBrokerFailure(t *testing.T) {
+	store := newMemoryOutboxStore()
+	broker := &flakyDirectProducer{failuresRemaining: 1}
+
+	producer, _, err := NewReliableProducer(
+		zap.NewNop(),
+		broker,
+		store,
+		nil,
+		pmessagingreliable.WithBatchSize(1),
+		pmessagingreliable.WithMaxAttempts(3),
+	)
+	if err != nil {
+		t.Fatalf("failed to create reliable producer: %v", err)
+	}
+
+	env := newTestEnvelope(t, []byte(`{"transferRef":"tx-1","status":"pending"}`))
+	if err := producer.SendWithOutbox(context.Background(), env); err != nil {
+		t.Fatalf("failed to enqueue envelope into outbox: %v", err)
+	}
+
+	eventID := env.GetMessageId().String()
+	persisted := store.EventByID(eventID)
+	if persisted == nil {
+		t.Fatalf("expected outbox event %s to be persisted", eventID)
+	}
+	if persisted.Status != StatusPending {
+		t.Fatalf("expected pending status after enqueue, got %q", persisted.Status)
+	}
+	if persisted.Attempts != 0 {
+		t.Fatalf("expected zero attempts after enqueue, got %d", persisted.Attempts)
+	}
+
+	processed, err := producer.DispatchPending(context.Background())
+	if err != nil {
+		t.Fatalf("first dispatch failed: %v", err)
+	}
+	if processed != 1 {
+		t.Fatalf("expected first dispatch to process 1 event, got %d", processed)
+	}
+
+	afterFailure := store.EventByID(eventID)
+	if afterFailure == nil {
+		t.Fatalf("expected outbox event %s to exist after broker failure", eventID)
+	}
+	if afterFailure.Status != StatusPending {
+		t.Fatalf("expected event to stay pending after transient broker error, got %q", afterFailure.Status)
+	}
+	if afterFailure.Attempts != 1 {
+		t.Fatalf("expected attempts to increment to 1 after failure, got %d", afterFailure.Attempts)
+	}
+	if afterFailure.SentAt != nil {
+		t.Fatalf("expected sentAt to be empty after failed publish")
+	}
+
+	processed, err = producer.DispatchPending(context.Background())
+	if err != nil {
+		t.Fatalf("second dispatch failed: %v", err)
+	}
+	if processed != 1 {
+		t.Fatalf("expected second dispatch to process 1 event, got %d", processed)
+	}
+
+	afterRetry := store.EventByID(eventID)
+	if afterRetry == nil {
+		t.Fatalf("expected outbox event %s to exist after retry", eventID)
+	}
+	if afterRetry.Status != StatusSent {
+		t.Fatalf("expected event to be sent after retry, got %q", afterRetry.Status)
+	}
+	if afterRetry.Attempts != 1 {
+		t.Fatalf("expected attempts to remain 1 after successful retry, got %d", afterRetry.Attempts)
+	}
+	if afterRetry.SentAt == nil {
+		t.Fatalf("expected sentAt to be set after successful publish")
+	}
+
+	if attempts := broker.Attempts(); attempts != 2 {
+		t.Fatalf("expected two broker attempts (fail then success), got %d", attempts)
+	}
+}
+
+func TestGatewayReliableProducerMarksFailedAfterMaxAttempts(t *testing.T) {
+	store := newMemoryOutboxStore()
+	broker := &flakyDirectProducer{failuresRemaining: 10}
+
+	producer, _, err := NewReliableProducer(
+		zap.NewNop(),
+		broker,
+		store,
+		nil,
+		pmessagingreliable.WithBatchSize(1),
+		pmessagingreliable.WithMaxAttempts(2),
+	)
+	if err != nil {
+		t.Fatalf("failed to create reliable producer: %v", err)
+	}
+
+	env := newTestEnvelope(t, []byte(`{"transferRef":"tx-2","status":"pending"}`))
+	if err := producer.SendWithOutbox(context.Background(), env); err != nil {
+		t.Fatalf("failed to enqueue envelope into outbox: %v", err)
+	}
+
+	eventID := env.GetMessageId().String()
+
+	processed, err := producer.DispatchPending(context.Background())
+	if err != nil {
+		t.Fatalf("first dispatch failed: %v", err)
+	}
+	if processed != 1 {
+		t.Fatalf("expected first dispatch to process 1 event, got %d", processed)
+	}
+
+	processed, err = producer.DispatchPending(context.Background())
+	if err != nil {
+		t.Fatalf("second dispatch failed: %v", err)
+	}
+	if processed != 1 {
+		t.Fatalf("expected second dispatch to process 1 event, got %d", processed)
+	}
+
+	processed, err = producer.DispatchPending(context.Background())
+	if err != nil {
+		t.Fatalf("third dispatch failed: %v", err)
+	}
+	if processed != 0 {
+		t.Fatalf("expected failed event to be excluded from pending queue, got processed=%d", processed)
+	}
+
+	final := store.EventByID(eventID)
+	if final == nil {
+		t.Fatalf("expected outbox event %s to exist", eventID)
+	}
+	if final.Status != StatusFailed {
+		t.Fatalf("expected event to be marked failed after max attempts, got %q", final.Status)
+	}
+	if final.Attempts != 2 {
+		t.Fatalf("expected attempts to equal max attempts (2), got %d", final.Attempts)
+	}
+	if final.SentAt != nil {
+		t.Fatalf("expected sentAt to remain empty for failed event")
+	}
+}
+
+func newTestEnvelope(t *testing.T, payload []byte) me.Envelope {
+	t.Helper()
+
+	env := me.CreateEnvelope("gateway.common.outbox.test", domainmodel.NewNotification(mservice.ChainGateway, notification.NAUpdated))
+	if _, err := env.Wrap(payload); err != nil {
+		t.Fatalf("failed to wrap test payload: %v", err)
+	}
+
+	return env
+}
+
+type memoryOutboxStore struct {
+	mu sync.Mutex
+
+	eventsByRef map[bson.ObjectID]*Event
+	refByEvent  map[string]bson.ObjectID
+}
+
+func newMemoryOutboxStore() *memoryOutboxStore {
+	return &memoryOutboxStore{
+		eventsByRef: make(map[bson.ObjectID]*Event),
+		refByEvent:  make(map[string]bson.ObjectID),
+	}
+}
+
+func (s *memoryOutboxStore) Create(_ context.Context, event *Event) error {
+	if event == nil {
+		return errors.New("event is nil")
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	eventID := strings.TrimSpace(event.EventID)
+	if eventID == "" {
+		return errors.New("event id is required")
+	}
+	if _, exists := s.refByEvent[eventID]; exists {
+		return errors.New("duplicate event id")
+	}
+
+	stored := cloneEvent(event)
+	stored.SetID(bson.NewObjectID())
+	if stored.Status == "" {
+		stored.Status = StatusPending
+	}
+
+	ref := *stored.GetID()
+	s.eventsByRef[ref] = stored
+	s.refByEvent[eventID] = ref
+	return nil
+}
+
+func (s *memoryOutboxStore) ListPending(_ context.Context, limit int) ([]*Event, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	pending := make([]*Event, 0, len(s.eventsByRef))
+	for _, event := range s.eventsByRef {
+		if event.Status == StatusPending {
+			pending = append(pending, cloneEvent(event))
+		}
+	}
+	sort.Slice(pending, func(i, j int) bool {
+		return pending[i].CreatedAt.Before(pending[j].CreatedAt)
+	})
+
+	if limit > 0 && len(pending) > limit {
+		pending = pending[:limit]
+	}
+	return pending, nil
+}
+
+func (s *memoryOutboxStore) MarkSent(_ context.Context, eventRef bson.ObjectID, sentAt time.Time) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	event, ok := s.eventsByRef[eventRef]
+	if !ok {
+		return errors.New("event not found")
+	}
+	event.Status = StatusSent
+	when := sentAt.UTC()
+	event.SentAt = &when
+	event.Update()
+	return nil
+}
+
+func (s *memoryOutboxStore) MarkFailed(_ context.Context, eventRef bson.ObjectID) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	event, ok := s.eventsByRef[eventRef]
+	if !ok {
+		return errors.New("event not found")
+	}
+	event.Status = StatusFailed
+	event.Update()
+	return nil
+}
+
+func (s *memoryOutboxStore) IncrementAttempts(_ context.Context, eventRef bson.ObjectID) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	event, ok := s.eventsByRef[eventRef]
+	if !ok {
+		return errors.New("event not found")
+	}
+	event.Attempts++
+	event.Update()
+	return nil
+}
+
+func (s *memoryOutboxStore) EventByID(eventID string) *Event {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	ref, ok := s.refByEvent[eventID]
+	if !ok {
+		return nil
+	}
+
+	event, ok := s.eventsByRef[ref]
+	if !ok {
+		return nil
+	}
+	return cloneEvent(event)
+}
+
+func cloneEvent(event *Event) *Event {
+	if event == nil {
+		return nil
+	}
+	copyEvent := *event
+	copyEvent.Payload = append([]byte(nil), event.Payload...)
+	if event.SentAt != nil {
+		sentAt := *event.SentAt
+		copyEvent.SentAt = &sentAt
+	}
+	return &copyEvent
+}
+
+type flakyDirectProducer struct {
+	mu                sync.Mutex
+	failuresRemaining int
+	attempts          int
+}
+
+func (p *flakyDirectProducer) SendMessage(_ me.Envelope) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	p.attempts++
+	if p.failuresRemaining > 0 {
+		p.failuresRemaining--
+		return errors.New("broker unavailable")
+	}
+	return nil
+}
+
+func (p *flakyDirectProducer) Attempts() int {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	return p.attempts
+}

api/gateway/common/outbox/reliable_runtime.go

@@ -0,0 +1,72 @@
+package outbox
+
+import (
+	"context"
+	"sync"
+
+	"github.com/tech/sendico/pkg/merrors"
+	pmessaging "github.com/tech/sendico/pkg/messaging"
+	me "github.com/tech/sendico/pkg/messaging/envelope"
+	pmessagingreliable "github.com/tech/sendico/pkg/messaging/reliable"
+	"github.com/tech/sendico/pkg/mlogger"
+	cfgmodel "github.com/tech/sendico/pkg/model"
+	"go.uber.org/zap"
+)
+
+// ReliableRuntime owns a reliable producer lifecycle for gateway outbox dispatch.
+type ReliableRuntime struct {
+	once     sync.Once
+	cancel   context.CancelFunc
+	producer *pmessagingreliable.ReliableProducer
+	settings pmessagingreliable.Settings
+	initErr  error
+}
+
+func (r *ReliableRuntime) Start(logger mlogger.Logger, direct pmessaging.Producer, store Store, messagingSettings cfgmodel.SettingsT, opts ...pmessagingreliable.Option) error {
+	if r == nil {
+		return nil
+	}
+	if logger == nil {
+		logger = zap.NewNop()
+	}
+	logger = logger.Named("outbox_reliable")
+
+	r.once.Do(func() {
+		reliableProducer, settings, err := NewReliableProducer(logger, direct, store, messagingSettings, opts...)
+		if err != nil {
+			r.initErr = err
+			return
+		}
+		r.producer = reliableProducer
+		r.settings = settings
+		if r.producer == nil || direct == nil {
+			logger.Info("Outbox reliable publisher disabled", zap.Bool("enabled", settings.Enabled))
+			return
+		}
+		logger.Info("Outbox reliable publisher configured",
+			zap.Bool("enabled", settings.Enabled),
+			zap.Int("batch_size", settings.BatchSize),
+			zap.Int("poll_interval_seconds", settings.PollIntervalSeconds),
+			zap.Int("max_attempts", settings.MaxAttempts))
+
+		ctx, cancel := context.WithCancel(context.Background())
+		r.cancel = cancel
+		go r.producer.Run(ctx)
+	})
+
+	return r.initErr
+}
+
+func (r *ReliableRuntime) Send(ctx context.Context, envelope me.Envelope) error {
+	if r == nil || r.producer == nil {
+		return merrors.Internal("reliable outbox producer is not configured")
+	}
+	return r.producer.SendWithOutbox(ctx, envelope)
+}
+
+func (r *ReliableRuntime) Stop() {
+	if r == nil || r.cancel == nil {
+		return
+	}
+	r.cancel()
+}

api/gateway/common/outbox/store.go

@@ -0,0 +1,17 @@
+package outbox
+
+import (
+	"context"
+	"time"
+
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// Store persists gateway outbox events.
+type Store interface {
+	Create(ctx context.Context, event *Event) error
+	ListPending(ctx context.Context, limit int) ([]*Event, error)
+	MarkSent(ctx context.Context, eventRef bson.ObjectID, sentAt time.Time) error
+	MarkFailed(ctx context.Context, eventRef bson.ObjectID) error
+	IncrementAttempts(ctx context.Context, eventRef bson.ObjectID) error
+}

api/gateway/mntx/go.mod

@@ -4,10 +4,13 @@ go 1.25.7
 
 replace github.com/tech/sendico/pkg => ../../pkg
 
+replace github.com/tech/sendico/gateway/common => ../common
+
 require (
 	github.com/go-chi/chi/v5 v5.2.5
 	github.com/prometheus/client_golang v1.23.2
 	github.com/shopspring/decimal v1.4.0
+	github.com/tech/sendico/gateway/common v0.1.0
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver/v2 v2.5.0
 	go.uber.org/zap v1.27.1
@@ -48,5 +51,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 )

api/gateway/mntx/go.sum

@@ -210,8 +210,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

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

@@ -191,14 +191,18 @@ func (i *Imp) Start() error {
 		if cfg.GRPC != nil {
 			invokeURI = cfg.GRPC.DiscoveryInvokeURI()
 		}
-		svc := mntxservice.NewService(logger,
+		opts := []mntxservice.Option{
 			mntxservice.WithDiscoveryInvokeURI(invokeURI),
 			mntxservice.WithProducer(producer),
 			mntxservice.WithMonetixConfig(monetixCfg),
 			mntxservice.WithGatewayDescriptor(gatewayDescriptor),
 			mntxservice.WithHTTPClient(&http.Client{Timeout: monetixCfg.Timeout()}),
 			mntxservice.WithStorage(repo),
-		)
+		}
+		if cfg.Messaging != nil {
+			opts = append(opts, mntxservice.WithMessagingSettings(cfg.Messaging.Settings))
+		}
+		svc := mntxservice.NewService(logger, opts...)
 		i.service = svc
 
 		if err := i.startHTTPCallbackServer(svc, callbackCfg); err != nil {

api/gateway/mntx/internal/service/gateway/card_processor.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 
 	"github.com/shopspring/decimal"
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/gateway/mntx/internal/service/monetix"
 	"github.com/tech/sendico/gateway/mntx/storage"
 	"github.com/tech/sendico/gateway/mntx/storage/model"
@@ -17,6 +18,7 @@ import (
 	"github.com/tech/sendico/pkg/merrors"
 	msg "github.com/tech/sendico/pkg/messaging"
 	"github.com/tech/sendico/pkg/mlogger"
+	pmodel "github.com/tech/sendico/pkg/model"
 	gatewayv1 "github.com/tech/sendico/pkg/proto/common/gateway/v1"
 	mntxv1 "github.com/tech/sendico/pkg/proto/gateway/mntx/v1"
 	"go.mongodb.org/mongo-driver/v2/bson"
@@ -30,6 +32,8 @@ type cardPayoutProcessor struct {
 	store      storage.Repository
 	httpClient *http.Client
 	producer   msg.Producer
+	msgCfg     pmodel.SettingsT
+	outbox     *gatewayoutbox.ReliableRuntime
 
 	perTxMinAmountMinor           int64
 	perTxMinAmountMinorByCurrency map[string]int64

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

@@ -8,6 +8,7 @@ import (
 	"github.com/tech/sendico/gateway/mntx/storage"
 	"github.com/tech/sendico/pkg/clock"
 	msg "github.com/tech/sendico/pkg/messaging"
+	pmodel "github.com/tech/sendico/pkg/model"
 	gatewayv1 "github.com/tech/sendico/pkg/proto/common/gateway/v1"
 )
 
@@ -67,3 +68,12 @@ func WithDiscoveryInvokeURI(invokeURI string) Option {
 		s.invokeURI = strings.TrimSpace(invokeURI)
 	}
 }
+
+// WithMessagingSettings applies messaging driver settings.
+func WithMessagingSettings(settings pmodel.SettingsT) Option {
+	return func(s *Service) {
+		if settings != nil {
+			s.msgCfg = settings
+		}
+	}
+}

api/gateway/mntx/internal/service/gateway/outbox_reliable.go

@@ -0,0 +1,50 @@
+package gateway
+
+import (
+	"context"
+
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
+	"github.com/tech/sendico/pkg/db/transaction"
+	me "github.com/tech/sendico/pkg/messaging/envelope"
+)
+
+type mntxOutboxProvider interface {
+	Outbox() gatewayoutbox.Store
+}
+
+type mntxTransactionProvider interface {
+	TransactionFactory() transaction.Factory
+}
+
+func (p *cardPayoutProcessor) outboxStore() gatewayoutbox.Store {
+	provider, ok := p.store.(mntxOutboxProvider)
+	if !ok || provider == nil {
+		return nil
+	}
+	return provider.Outbox()
+}
+
+func (p *cardPayoutProcessor) startOutboxReliableProducer() error {
+	if p == nil || p.outbox == nil {
+		return nil
+	}
+	return p.outbox.Start(p.logger, p.producer, p.outboxStore(), p.msgCfg)
+}
+
+func (p *cardPayoutProcessor) sendWithOutbox(ctx context.Context, env me.Envelope) error {
+	if err := p.startOutboxReliableProducer(); err != nil {
+		return err
+	}
+	if p.outbox == nil {
+		return nil
+	}
+	return p.outbox.Send(ctx, env)
+}
+
+func (p *cardPayoutProcessor) executeTransaction(ctx context.Context, cb transaction.Callback) (any, error) {
+	provider, ok := p.store.(mntxTransactionProvider)
+	if !ok || provider == nil || provider.TransactionFactory() == nil {
+		return cb(ctx)
+	}
+	return provider.TransactionFactory().CreateTransaction().Execute(ctx, cb)
+}

api/gateway/mntx/internal/service/gateway/service.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 	"strings"
 
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/gateway/mntx/internal/appversion"
 	"github.com/tech/sendico/gateway/mntx/internal/service/monetix"
 	"github.com/tech/sendico/gateway/mntx/storage"
@@ -14,6 +15,7 @@ import (
 	"github.com/tech/sendico/pkg/discovery"
 	msg "github.com/tech/sendico/pkg/messaging"
 	"github.com/tech/sendico/pkg/mlogger"
+	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
 	gatewayv1 "github.com/tech/sendico/pkg/proto/common/gateway/v1"
 	connectorv1 "github.com/tech/sendico/pkg/proto/connector/v1"
@@ -25,10 +27,12 @@ type Service struct {
 	logger            mlogger.Logger
 	clock             clockpkg.Clock
 	producer          msg.Producer
+	msgCfg            pmodel.SettingsT
 	storage           storage.Repository
 	config            monetix.Config
 	httpClient        *http.Client
 	card              *cardPayoutProcessor
+	outbox            gatewayoutbox.ReliableRuntime
 	gatewayDescriptor *gatewayv1.GatewayInstanceDescriptor
 	announcer         *discovery.Announcer
 	invokeURI         string
@@ -64,6 +68,7 @@ func NewService(logger mlogger.Logger, opts ...Option) *Service {
 		logger: logger.Named("service"),
 		clock:  clockpkg.NewSystem(),
 		config: monetix.DefaultConfig(),
+		msgCfg: map[string]any{},
 	}
 
 	initMetrics()
@@ -85,6 +90,11 @@ func NewService(logger mlogger.Logger, opts ...Option) *Service {
 	}
 
 	svc.card = newCardPayoutProcessor(svc.logger, svc.config, svc.clock, svc.storage, svc.httpClient, svc.producer)
+	svc.card.outbox = &svc.outbox
+	svc.card.msgCfg = svc.msgCfg
+	if err := svc.card.startOutboxReliableProducer(); err != nil {
+		svc.logger.Warn("Failed to initialise outbox reliable producer", zap.Error(err))
+	}
 	svc.card.applyGatewayDescriptor(svc.gatewayDescriptor)
 	svc.startDiscoveryAnnouncer()
 
@@ -102,6 +112,7 @@ func (s *Service) Shutdown() {
 	if s == nil {
 		return
 	}
+	s.outbox.Stop()
 	if s.announcer != nil {
 		s.announcer.Stop()
 	}

api/gateway/mntx/internal/service/gateway/transfer_notifications.go

@@ -38,27 +38,49 @@ func toOpStatus(t *model.CardPayout) (rail.OperationResult, error) {
 }
 
 func (p *cardPayoutProcessor) updatePayoutStatus(ctx context.Context, state *model.CardPayout) error {
-	if err := p.store.Payouts().Upsert(ctx, state); err != nil {
+	if !isFinalStatus(state) {
+		if err := p.store.Payouts().Upsert(ctx, state); err != nil {
+			p.logger.Warn("Failed to update transfer status", zap.Error(err), mzap.ObjRef("payout_ref", state.ID),
+				zap.String("payment_ref", state.PaymentRef), zap.String("status", string(state.Status)),
+			)
+			return err
+		}
+		return nil
+	}
+
+	_, err := p.executeTransaction(ctx, func(txCtx context.Context) (any, error) {
+		if upsertErr := p.store.Payouts().Upsert(txCtx, state); upsertErr != nil {
+			return nil, upsertErr
+		}
+		if isFinalStatus(state) {
+			if emitErr := p.emitTransferStatusEvent(txCtx, state); emitErr != nil {
+				return nil, emitErr
+			}
+		}
+		return nil, nil
+	})
+	if err != nil {
 		p.logger.Warn("Failed to update transfer status", zap.Error(err), mzap.ObjRef("payout_ref", state.ID),
 			zap.String("payment_ref", state.PaymentRef), zap.String("status", string(state.Status)),
 		)
-	}
+		return err
-	if isFinalStatus(state) {
-		p.emitTransferStatusEvent(state)
 	}
 	return nil
 }
 
-func (p *cardPayoutProcessor) emitTransferStatusEvent(payout *model.CardPayout) {
+func (p *cardPayoutProcessor) emitTransferStatusEvent(ctx context.Context, payout *model.CardPayout) error {
-	if p == nil || p.producer == nil || payout == nil {
+	if p == nil || payout == nil {
-		return
+		return nil
+	}
+	if p.producer == nil || p.outboxStore() == nil {
+		return nil
 	}
 
 	status, err := toOpStatus(payout)
 	if err != nil {
 		p.logger.Warn("Failed to convert payout status to operation status for transfer status event", zap.Error(err),
 			mzap.ObjRef("payout_ref", payout.ID), zap.String("payment_ref", payout.PaymentRef), zap.String("status", string(payout.Status)))
-		return
+		return err
 	}
 
 	exec := pmodel.PaymentGatewayExecution{
@@ -75,7 +97,9 @@ func (p *cardPayoutProcessor) emitTransferStatusEvent(payout *model.CardPayout)
 		TransferRef:  payout.GetID().Hex(),
 	}
 	env := paymentgateway.PaymentGatewayExecution(mservice.MntxGateway, &exec)
-	if err := p.producer.SendMessage(env); err != nil {
+	if err := p.sendWithOutbox(ctx, env); err != nil {
 		p.logger.Warn("Failed to publish transfer status event", zap.Error(err), mzap.ObjRef("transfer_ref", payout.ID))
+		return err
 	}
+	return nil
 }

api/gateway/mntx/storage/mongo/repository.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"time"
 
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/gateway/mntx/storage"
 	"github.com/tech/sendico/gateway/mntx/storage/mongo/store"
 	"github.com/tech/sendico/pkg/db"
+	"github.com/tech/sendico/pkg/db/transaction"
 	"github.com/tech/sendico/pkg/merrors"
 	"github.com/tech/sendico/pkg/mlogger"
 	"go.mongodb.org/mongo-driver/v2/mongo"
@@ -14,11 +16,13 @@ import (
 )
 
 type Repository struct {
-	logger mlogger.Logger
+	logger    mlogger.Logger
-	conn   *db.MongoConnection
+	conn      *db.MongoConnection
-	db     *mongo.Database
+	db        *mongo.Database
+	txFactory transaction.Factory
 
 	payouts storage.PayoutsStore
+	outbox  gatewayoutbox.Store
 }
 
 func New(logger mlogger.Logger, conn *db.MongoConnection) (*Repository, error) {
@@ -42,9 +46,10 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Repository, error) {
 		logger = logger.With(zap.String("database", dbName))
 	}
 	result := &Repository{
-		logger: logger,
+		logger:    logger,
-		conn:   conn,
+		conn:      conn,
-		db:     db,
+		db:        db,
+		txFactory: newMongoTransactionFactory(client),
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
@@ -57,7 +62,13 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Repository, error) {
 		result.logger.Error("Failed to initialise payouts store", zap.Error(err), zap.String("store", "payments"))
 		return nil, err
 	}
+	outboxStore, err := gatewayoutbox.NewMongoStore(result.logger, result.db)
+	if err != nil {
+		result.logger.Error("Failed to initialise outbox store", zap.Error(err), zap.String("store", "outbox"))
+		return nil, err
+	}
 	result.payouts = payoutsStore
+	result.outbox = outboxStore
 	result.logger.Info("Payouts gateway MongoDB storage initialised")
 	return result, nil
 }
@@ -66,4 +77,12 @@ func (r *Repository) Payouts() storage.PayoutsStore {
 	return r.payouts
 }
 
+func (r *Repository) Outbox() gatewayoutbox.Store {
+	return r.outbox
+}
+
+func (r *Repository) TransactionFactory() transaction.Factory {
+	return r.txFactory
+}
+
 var _ storage.Repository = (*Repository)(nil)

api/gateway/mntx/storage/mongo/transaction.go

@@ -0,0 +1,38 @@
+package mongo
+
+import (
+	"context"
+
+	"github.com/tech/sendico/pkg/db/transaction"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+)
+
+type mongoTransactionFactory struct {
+	client *mongo.Client
+}
+
+func (f *mongoTransactionFactory) CreateTransaction() transaction.Transaction {
+	return &mongoTransaction{client: f.client}
+}
+
+type mongoTransaction struct {
+	client *mongo.Client
+}
+
+func (t *mongoTransaction) Execute(ctx context.Context, cb transaction.Callback) (any, error) {
+	session, err := t.client.StartSession()
+	if err != nil {
+		return nil, err
+	}
+	defer session.EndSession(ctx)
+
+	run := func(sessCtx context.Context) (any, error) {
+		return cb(sessCtx)
+	}
+
+	return session.WithTransaction(ctx, run)
+}
+
+func newMongoTransactionFactory(client *mongo.Client) transaction.Factory {
+	return &mongoTransactionFactory{client: client}
+}

api/gateway/tgsettle/go.mod

@@ -4,7 +4,10 @@ go 1.25.7
 
 replace github.com/tech/sendico/pkg => ../../pkg
 
+replace github.com/tech/sendico/gateway/common => ../common
+
 require (
+	github.com/tech/sendico/gateway/common v0.1.0
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver/v2 v2.5.0
 	go.uber.org/zap v1.27.1
@@ -45,5 +48,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 )

api/gateway/tgsettle/go.sum

@@ -208,8 +208,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

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

@@ -90,13 +90,18 @@ func (i *Imp) Start() error {
 		if cfg.GRPC != nil {
 			invokeURI = cfg.GRPC.DiscoveryInvokeURI()
 		}
+		msgSettings := map[string]any(nil)
+		if cfg.Messaging != nil {
+			msgSettings = cfg.Messaging.Settings
+		}
 		gwCfg := gateway.Config{
-			Rail:            cfg.Gateway.Rail,
+			Rail:              cfg.Gateway.Rail,
-			TargetChatIDEnv: cfg.Gateway.TargetChatIDEnv,
+			TargetChatIDEnv:   cfg.Gateway.TargetChatIDEnv,
-			TimeoutSeconds:  cfg.Gateway.TimeoutSeconds,
+			TimeoutSeconds:    cfg.Gateway.TimeoutSeconds,
-			AcceptedUserIDs: cfg.Gateway.AcceptedUserIDs,
+			AcceptedUserIDs:   cfg.Gateway.AcceptedUserIDs,
-			SuccessReaction: cfg.Gateway.SuccessReaction,
+			SuccessReaction:   cfg.Gateway.SuccessReaction,
-			InvokeURI:       invokeURI,
+			InvokeURI:         invokeURI,
+			MessagingSettings: msgSettings,
 		}
 		svc := gateway.NewService(logger, repo, producer, broker, gwCfg)
 		i.service = svc

api/gateway/tgsettle/internal/service/gateway/outbox_reliable.go

@@ -0,0 +1,47 @@
+package gateway
+
+import (
+	"context"
+
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
+	"github.com/tech/sendico/pkg/db/transaction"
+	me "github.com/tech/sendico/pkg/messaging/envelope"
+)
+
+type tgOutboxProvider interface {
+	Outbox() gatewayoutbox.Store
+}
+
+type tgTransactionProvider interface {
+	TransactionFactory() transaction.Factory
+}
+
+func (s *Service) outboxStore() gatewayoutbox.Store {
+	provider, ok := s.repo.(tgOutboxProvider)
+	if !ok || provider == nil {
+		return nil
+	}
+	return provider.Outbox()
+}
+
+func (s *Service) startOutboxReliableProducer() error {
+	if s == nil || s.repo == nil {
+		return nil
+	}
+	return s.outbox.Start(s.logger, s.producer, s.outboxStore(), s.msgCfg)
+}
+
+func (s *Service) sendWithOutbox(ctx context.Context, env me.Envelope) error {
+	if err := s.startOutboxReliableProducer(); err != nil {
+		return err
+	}
+	return s.outbox.Send(ctx, env)
+}
+
+func (s *Service) executeTransaction(ctx context.Context, cb transaction.Callback) (any, error) {
+	provider, ok := s.repo.(tgTransactionProvider)
+	if !ok || provider == nil || provider.TransactionFactory() == nil {
+		return cb(ctx)
+	}
+	return provider.TransactionFactory().CreateTransaction().Execute(ctx, cb)
+}

api/gateway/tgsettle/internal/service/gateway/service.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"time"
 
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/gateway/tgsettle/storage"
 	storagemodel "github.com/tech/sendico/gateway/tgsettle/storage/model"
 	"github.com/tech/sendico/pkg/api/routers"
@@ -20,6 +21,7 @@ import (
 	tnotifications "github.com/tech/sendico/pkg/messaging/notifications/telegram"
 	"github.com/tech/sendico/pkg/mlogger"
 	"github.com/tech/sendico/pkg/model"
+	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
 	paymenttypes "github.com/tech/sendico/pkg/payments/types"
 	moneyv1 "github.com/tech/sendico/pkg/proto/common/money/v1"
@@ -48,12 +50,13 @@ const (
 )
 
 type Config struct {
-	Rail            string
+	Rail              string
-	TargetChatIDEnv string
+	TargetChatIDEnv   string
-	TimeoutSeconds  int32
+	TimeoutSeconds    int32
-	AcceptedUserIDs []string
+	AcceptedUserIDs   []string
-	SuccessReaction string
+	SuccessReaction   string
-	InvokeURI       string
+	InvokeURI         string
+	MessagingSettings pmodel.SettingsT
 }
 
 type Service struct {
@@ -62,11 +65,13 @@ type Service struct {
 	producer        msg.Producer
 	broker          mb.Broker
 	cfg             Config
+	msgCfg          pmodel.SettingsT
 	rail            string
 	chatID          string
 	announcer       *discovery.Announcer
 	invokeURI       string
 	successReaction string
+	outbox          gatewayoutbox.ReliableRuntime
 
 	consumers []msg.Consumer
 
@@ -84,6 +89,7 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 		producer:  producer,
 		broker:    broker,
 		cfg:       cfg,
+		msgCfg:    cfg.MessagingSettings,
 		rail:      strings.TrimSpace(cfg.Rail),
 		invokeURI: strings.TrimSpace(cfg.InvokeURI),
 	}
@@ -92,6 +98,9 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 	if svc.successReaction == "" {
 		svc.successReaction = defaultTelegramSuccessReaction
 	}
+	if err := svc.startOutboxReliableProducer(); err != nil {
+		svc.logger.Warn("Failed to initialise outbox reliable producer", zap.Error(err))
+	}
 	svc.startConsumers()
 	svc.startAnnouncer()
 	return svc
@@ -107,6 +116,7 @@ func (s *Service) Shutdown() {
 	if s == nil {
 		return
 	}
+	s.outbox.Stop()
 	if s.announcer != nil {
 		s.announcer.Stop()
 	}

api/gateway/tgsettle/internal/service/gateway/transfer_notifications.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/tech/sendico/gateway/tgsettle/storage/model"
+	"github.com/tech/sendico/pkg/merrors"
 	paymentgateway "github.com/tech/sendico/pkg/messaging/notifications/paymentgateway"
 	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
@@ -21,33 +22,57 @@ func isFinalStatus(t *model.PaymentRecord) bool {
 	}
 }
 
-func toOpStatus(t *model.PaymentRecord) rail.OperationResult {
+func toOpStatus(t *model.PaymentRecord) (rail.OperationResult, error) {
 	switch t.Status {
 	case model.PaymentStatusFailed:
-		return rail.OperationResultFailed
+		return rail.OperationResultFailed, nil
 	case model.PaymentStatusSuccess:
-		return rail.OperationResultSuccess
+		return rail.OperationResultSuccess, nil
 	case model.PaymentStatusCancelled:
-		return rail.OperationResultCancelled
+		return rail.OperationResultCancelled, nil
 	default:
-		panic("unexpected transfer status")
+		return rail.OperationResultFailed, merrors.InvalidArgument("unexpected transfer status", "payment.status")
 	}
 }
 
 func (s *Service) updateTransferStatus(ctx context.Context, record *model.PaymentRecord) error {
-	if err := s.repo.Payments().Upsert(ctx, record); err != nil {
+	if !isFinalStatus(record) {
+		if err := s.repo.Payments().Upsert(ctx, record); err != nil {
+			s.logger.Warn("Failed to update transfer status", zap.String("payment_ref", record.PaymentIntentID), zap.String("status", string(record.Status)), zap.Error(err))
+			return err
+		}
+		return nil
+	}
+
+	_, err := s.executeTransaction(ctx, func(txCtx context.Context) (any, error) {
+		if upsertErr := s.repo.Payments().Upsert(txCtx, record); upsertErr != nil {
+			return nil, upsertErr
+		}
+		if isFinalStatus(record) {
+			if emitErr := s.emitTransferStatusEvent(txCtx, record); emitErr != nil {
+				return nil, emitErr
+			}
+		}
+		return nil, nil
+	})
+	if err != nil {
 		s.logger.Warn("Failed to update transfer status", zap.String("payment_ref", record.PaymentIntentID), zap.String("status", string(record.Status)), zap.Error(err))
 		return err
 	}
-	if isFinalStatus(record) {
-		s.emitTransferStatusEvent(ctx, record)
-	}
 	return nil
 }
 
-func (s *Service) emitTransferStatusEvent(_ context.Context, record *model.PaymentRecord) {
+func (s *Service) emitTransferStatusEvent(ctx context.Context, record *model.PaymentRecord) error {
-	if s == nil || s.producer == nil || record == nil {
+	if s == nil || record == nil {
-		return
+		return nil
+	}
+	if s.producer == nil || s.outboxStore() == nil {
+		return nil
+	}
+	status, err := toOpStatus(record)
+	if err != nil {
+		s.logger.Warn("Failed to map transfer status for transfer status event", zap.Error(err), mzap.ObjRef("transfer_ref", record.ID))
+		return err
 	}
 
 	exec := pmodel.PaymentGatewayExecution{
@@ -55,13 +80,15 @@ func (s *Service) emitTransferStatusEvent(_ context.Context, record *model.Payme
 		IdempotencyKey:  record.IdempotencyKey,
 		ExecutedMoney:   record.ExecutedMoney,
 		PaymentRef:      record.PaymentRef,
-		Status:          toOpStatus(record),
+		Status:          status,
 		OperationRef:    record.OperationRef,
 		Error:           record.FailureReason,
 		TransferRef:     record.ID.Hex(),
 	}
 	env := paymentgateway.PaymentGatewayExecution(mservice.MntxGateway, &exec)
-	if err := s.producer.SendMessage(env); err != nil {
+	if sendErr := s.sendWithOutbox(ctx, env); sendErr != nil {
-		s.logger.Warn("Failed to publish transfer status event", zap.Error(err), mzap.ObjRef("transfer_ref", record.ID))
+		s.logger.Warn("Failed to publish transfer status event", zap.Error(sendErr), mzap.ObjRef("transfer_ref", record.ID))
+		return sendErr
 	}
+	return nil
 }

api/gateway/tgsettle/storage/mongo/repository.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"time"
 
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/gateway/tgsettle/storage"
 	"github.com/tech/sendico/gateway/tgsettle/storage/mongo/store"
 	"github.com/tech/sendico/pkg/db"
+	"github.com/tech/sendico/pkg/db/transaction"
 	"github.com/tech/sendico/pkg/merrors"
 	"github.com/tech/sendico/pkg/mlogger"
 	"go.mongodb.org/mongo-driver/v2/mongo"
@@ -14,12 +16,14 @@ import (
 )
 
 type Repository struct {
-	logger mlogger.Logger
+	logger    mlogger.Logger
-	conn   *db.MongoConnection
+	conn      *db.MongoConnection
-	db     *mongo.Database
+	db        *mongo.Database
+	txFactory transaction.Factory
 
 	payments storage.PaymentsStore
 	tg       storage.TelegramConfirmationsStore
+	outbox   gatewayoutbox.Store
 }
 
 func New(logger mlogger.Logger, conn *db.MongoConnection) (*Repository, error) {
@@ -43,9 +47,10 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Repository, error) {
 		logger = logger.With(zap.String("database", dbName))
 	}
 	result := &Repository{
-		logger: logger,
+		logger:    logger,
-		conn:   conn,
+		conn:      conn,
-		db:     db,
+		db:        db,
+		txFactory: newMongoTransactionFactory(client),
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
@@ -63,8 +68,14 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Repository, error) {
 		result.logger.Error("Failed to initialise telegram confirmations store", zap.Error(err), zap.String("store", "telegram_confirmations"))
 		return nil, err
 	}
+	outboxStore, err := gatewayoutbox.NewMongoStore(result.logger, result.db)
+	if err != nil {
+		result.logger.Error("Failed to initialise outbox store", zap.Error(err), zap.String("store", "outbox"))
+		return nil, err
+	}
 	result.payments = paymentsStore
 	result.tg = tgStore
+	result.outbox = outboxStore
 	result.logger.Info("Payment gateway MongoDB storage initialised")
 	return result, nil
 }
@@ -77,4 +88,12 @@ func (r *Repository) TelegramConfirmations() storage.TelegramConfirmationsStore
 	return r.tg
 }
 
+func (r *Repository) Outbox() gatewayoutbox.Store {
+	return r.outbox
+}
+
+func (r *Repository) TransactionFactory() transaction.Factory {
+	return r.txFactory
+}
+
 var _ storage.Repository = (*Repository)(nil)

api/gateway/tgsettle/storage/mongo/transaction.go

@@ -0,0 +1,38 @@
+package mongo
+
+import (
+	"context"
+
+	"github.com/tech/sendico/pkg/db/transaction"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+)
+
+type mongoTransactionFactory struct {
+	client *mongo.Client
+}
+
+func (f *mongoTransactionFactory) CreateTransaction() transaction.Transaction {
+	return &mongoTransaction{client: f.client}
+}
+
+type mongoTransaction struct {
+	client *mongo.Client
+}
+
+func (t *mongoTransaction) Execute(ctx context.Context, cb transaction.Callback) (any, error) {
+	session, err := t.client.StartSession()
+	if err != nil {
+		return nil, err
+	}
+	defer session.EndSession(ctx)
+
+	run := func(sessCtx context.Context) (any, error) {
+		return cb(sessCtx)
+	}
+
+	return session.WithTransaction(ctx, run)
+}
+
+func newMongoTransactionFactory(client *mongo.Client) transaction.Factory {
+	return &mongoTransactionFactory{client: client}
+}

api/gateway/tron/go.mod

@@ -4,9 +4,11 @@ go 1.25.7
 
 replace github.com/tech/sendico/pkg => ../../pkg
 
+replace github.com/tech/sendico/gateway/common => ../common
+
 require (
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0
-	github.com/ethereum/go-ethereum v1.16.8
+	github.com/ethereum/go-ethereum v1.17.0
 	github.com/fbsobreira/gotron-sdk v0.24.1
 	github.com/hashicorp/vault/api v1.22.0
 	github.com/mitchellh/mapstructure v1.5.0
@@ -14,6 +16,7 @@ require (
 	github.com/shengdoushi/base58 v1.0.0
 	github.com/shopspring/decimal v1.4.0
 	github.com/stretchr/testify v1.11.1
+	github.com/tech/sendico/gateway/common v0.1.0
 	github.com/tech/sendico/pkg v0.1.0
 	go.mongodb.org/mongo-driver/v2 v2.5.0
 	go.uber.org/zap v1.27.1
@@ -24,7 +27,7 @@ require (
 
 require (
 	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260213131322-086e44a26cf3 // indirect
+	github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260215031811-a0ab0b218a81 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bits-and-blooms/bitset v1.24.4 // indirect
 	github.com/bmatcuk/doublestar/v4 v4.10.0 // indirect
@@ -36,14 +39,14 @@ require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/consensys/gnark-crypto v0.19.2 // indirect
 	github.com/crate-crypto/go-eth-kzg v1.5.0 // indirect
-	github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/deckarep/golang-set v1.8.0 // indirect
 	github.com/deckarep/golang-set/v2 v2.8.0 // indirect
 	github.com/ethereum/c-kzg-4844/v2 v2.1.5 // indirect
-	github.com/ethereum/go-verkle v0.2.2 // indirect
 	github.com/go-chi/chi/v5 v5.2.5 // indirect
 	github.com/go-jose/go-jose/v4 v4.1.3 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
@@ -83,6 +86,10 @@ require (
 	github.com/xdg-go/stringprep v1.0.4 // indirect
 	github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/otel v1.40.0 // indirect
+	go.opentelemetry.io/otel/metric v1.40.0 // indirect
+	go.opentelemetry.io/otel/trace v1.40.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	golang.org/x/crypto v0.48.0 // indirect
@@ -92,6 +99,6 @@ require (
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
 	golang.org/x/time v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260217215200-42d3e9bedb6d // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 )

api/gateway/tron/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 v0.0.0-20260213131322-086e44a26cf3 h1:QD30TjDPWtvXb5PBZGZ6Wdvaq7HQixIBtZ/yuseNXc8=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260215031811-a0ab0b218a81 h1:TBzelXBdnzDy+HCrBMcomEnhrmigkWOI1/mIPCi2u4M=
-github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260213131322-086e44a26cf3/go.mod h1:ioLG6R+5bUSO1oeGSDxOV3FADARuMoytZCSX6MEMQkI=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20260215031811-a0ab0b218a81/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=
@@ -54,8 +54,6 @@ github.com/cpuguy83/go-md2man/v2 v2.0.6 h1:XJtiaUW6dEEqVuZiMTn1ldk455QWwEIsMIJlo
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/crate-crypto/go-eth-kzg v1.5.0 h1:FYRiJMJG2iv+2Dy3fi14SVGjcPteZ5HAAUe4YWlJygc=
 github.com/crate-crypto/go-eth-kzg v1.5.0/go.mod h1:J9/u5sWfznSObptgfa92Jq8rTswn6ahQWEuiLHOjCUI=
-github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a h1:W8mUrRp6NOVl3J+MYp5kPMoUZPp7aOYHtaua31lwRHg=
-github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a/go.mod h1:sTwzHBvIzm2RfVCGNEBZgRyjwK40bVoun3ZnGOCafNM=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dchest/siphash v1.2.3 h1:QXwFc8cFOR2dSa/gE6o/HokBMWtLUaNDVd+22aKHeEA=
@@ -82,10 +80,8 @@ github.com/ethereum/c-kzg-4844/v2 v2.1.5 h1:aVtoLK5xwJ6c5RiqO8g8ptJ5KU+2Hdquf6G3
 github.com/ethereum/c-kzg-4844/v2 v2.1.5/go.mod h1:u59hRTTah4Co6i9fDWtiCjTrblJv0UwsqZKCc0GfgUs=
 github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab h1:rvv6MJhy07IMfEKuARQ9TKojGqLVNxQajaXEp/BoqSk=
 github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab/go.mod h1:IuLm4IsPipXKF7CW5Lzf68PIbZ5yl7FFd74l/E0o9A8=
-github.com/ethereum/go-ethereum v1.16.8 h1:LLLfkZWijhR5m6yrAXbdlTeXoqontH+Ga2f9igY7law=
+github.com/ethereum/go-ethereum v1.17.0 h1:2D+1Fe23CwZ5tQoAS5DfwKFNI1HGcTwi65/kRlAVxes=
-github.com/ethereum/go-ethereum v1.16.8/go.mod h1:Fs6QebQbavneQTYcA39PEKv2+zIjX7rPUZ14DER46wk=
+github.com/ethereum/go-ethereum v1.17.0/go.mod h1:2W3msvdosS/MCWytpqTcqgFiRYbTH59FxDJzqah120o=
-github.com/ethereum/go-verkle v0.2.2 h1:I2W0WjnrFUIzzVPwm8ykY+7pL2d4VhlsePn4j7cnFk8=
-github.com/ethereum/go-verkle v0.2.2/go.mod h1:M3b90YRnzqKyyzBEWJGqj8Qff4IDeXnzFw0P9bFw3uk=
 github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
 github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
 github.com/fbsobreira/gotron-sdk v0.24.1 h1:YxvF26zyXNkho1GxywQeq/gRi70aQ6sbWYop6OTWL7E=
@@ -100,6 +96,7 @@ github.com/go-chi/chi/v5 v5.2.5 h1:Eg4myHZBjyvJmAFjFvWgrqDTXFyOzjj7YIm3L3mu6Ug=
 github.com/go-chi/chi/v5 v5.2.5/go.mod h1:X7Gx4mteadT3eDOMTsXzmI4/rwUpOwBHLpAfupzFJP0=
 github.com/go-jose/go-jose/v4 v4.1.3 h1:CVLmWDhDVRa6Mi/IgCgaopNosCaHz7zrMeF9MlZRkrs=
 github.com/go-jose/go-jose/v4 v4.1.3/go.mod h1:x4oUasVrzR7071A4TnHLGSPpNOm2a21K9Kf04k1rs08=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
 github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
@@ -131,6 +128,10 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/grafana/pyroscope-go v1.2.7 h1:VWBBlqxjyR0Cwk2W6UrE8CdcdD80GOFNutj0Kb1T8ac=
+github.com/grafana/pyroscope-go v1.2.7/go.mod h1:o/bpSLiJYYP6HQtvcoVKiE9s5RiNgjYTj1DhiddP2Pc=
+github.com/grafana/pyroscope-go/godeltaprof v0.1.9 h1:c1Us8i6eSmkW+Ez05d3co8kasnuOY813tbMN8i/a3Og=
+github.com/grafana/pyroscope-go/godeltaprof v0.1.9/go.mod h1:2+l7K7twW49Ct4wFluZD3tZ6e0SjanjcUUBPVD/UuGU=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY2I=
 github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
@@ -186,8 +187,6 @@ github.com/mattn/go-colorable v0.1.14 h1:9A9LHSqF/7dyVVX6g0U9cwm9pG3kP9gSzcuIPHP
 github.com/mattn/go-colorable v0.1.14/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stgPZH1UqBm1s8=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU=
-github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/minio/sha256-simd v1.0.0 h1:v1ta+49hkWZyvaKwrQB8elexRqm6Y0aMLjCNsrYxo6g=
 github.com/minio/sha256-simd v1.0.0/go.mod h1:OuYzVNI5vcoYIAmbIvHPl3N3jUzVedXbKy5RFepssQM=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
@@ -218,8 +217,6 @@ github.com/nats-io/nkeys v0.4.15 h1:JACV5jRVO9V856KOapQ7x+EY8Jo3qw1vJt/9Jpwzkk4=
 github.com/nats-io/nkeys v0.4.15/go.mod h1:CpMchTXC9fxA5zrMo4KpySxNjiDVvr8ANOSZdiNfUrs=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
-github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
-github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.1.0 h1:8SG7/vwALn54lVB/0yZ/MMwhFrPYtpEHQb2IpWsCzug=
@@ -250,12 +247,10 @@ github.com/prometheus/common v0.67.5 h1:pIgK94WWlQt1WLwAC5j2ynLaBRDiinoAb86HZHTU
 github.com/prometheus/common v0.67.5/go.mod h1:SjE/0MzDEEAyrdr5Gqc6G+sXI67maCxzaT3A2+HqjUw=
 github.com/prometheus/procfs v0.19.2 h1:zUMhqEW66Ex7OXIiDkll3tl9a1ZdilUOd/F6ZXw4Vws=
 github.com/prometheus/procfs v0.19.2/go.mod h1:M0aotyiemPhBCM0z5w87kL22CxfcH05ZpYlu+b4J7mw=
-github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
-github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rjeczalik/notify v0.9.3 h1:6rJAzHTGKXGj76sbRgDiDcYj/HniypXmSJo1SWakZeY=
 github.com/rjeczalik/notify v0.9.3/go.mod h1:gF3zSOrafR9DQEWSE8TjfI9NkooDxbyT4UgRGKZA0lc=
-github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
+github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
-github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
+github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
 github.com/rs/cors v1.7.0 h1:+88SsELBHx5r+hZ8TCkggzSstaWNbDvThkVK8H6f9ik=
 github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
@@ -313,16 +308,16 @@ go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ
 go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0 h1:UP6IpuHFkUgOQL9FFQFrZ+5LiwhhYRbi7VZSIx6Nj5s=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0/go.mod h1:qxuZLtbq5QDtdeSHsS7bcf6EH6uO6jUAgk764zd3rhM=
-go.opentelemetry.io/otel v1.39.0 h1:8yPrr/S0ND9QEfTfdP9V+SiwT4E0G7Y5MO7p85nis48=
+go.opentelemetry.io/otel v1.40.0 h1:oA5YeOcpRTXq6NN7frwmwFR0Cn3RhTVZvXsP4duvCms=
-go.opentelemetry.io/otel v1.39.0/go.mod h1:kLlFTywNWrFyEdH0oj2xK0bFYZtHRYUdv1NklR/tgc8=
+go.opentelemetry.io/otel v1.40.0/go.mod h1:IMb+uXZUKkMXdPddhwAHm6UfOwJyh4ct1ybIlV14J0g=
-go.opentelemetry.io/otel/metric v1.39.0 h1:d1UzonvEZriVfpNKEVmHXbdf909uGTOQjA0HF0Ls5Q0=
+go.opentelemetry.io/otel/metric v1.40.0 h1:rcZe317KPftE2rstWIBitCdVp89A2HqjkxR3c11+p9g=
-go.opentelemetry.io/otel/metric v1.39.0/go.mod h1:jrZSWL33sD7bBxg1xjrqyDjnuzTUB0x1nBERXd7Ftcs=
+go.opentelemetry.io/otel/metric v1.40.0/go.mod h1:ib/crwQH7N3r5kfiBZQbwrTge743UDc7DTFVZrrXnqc=
 go.opentelemetry.io/otel/sdk v1.39.0 h1:nMLYcjVsvdui1B/4FRkwjzoRVsMK8uL/cj0OyhKzt18=
 go.opentelemetry.io/otel/sdk v1.39.0/go.mod h1:vDojkC4/jsTJsE+kh+LXYQlbL8CgrEcwmt1ENZszdJE=
 go.opentelemetry.io/otel/sdk/metric v1.39.0 h1:cXMVVFVgsIf2YL6QkRF4Urbr/aMInf+2WKg+sEJTtB8=
 go.opentelemetry.io/otel/sdk/metric v1.39.0/go.mod h1:xq9HEVH7qeX69/JnwEfp6fVq5wosJsY1mt4lLfYdVew=
-go.opentelemetry.io/otel/trace v1.39.0 h1:2d2vfpEDmCJ5zVYz7ijaJdOF59xLomrvj7bjt6/qCJI=
+go.opentelemetry.io/otel/trace v1.40.0 h1:WA4etStDttCSYuhwvEa8OP8I5EWu24lkOzp+ZYblVjw=
-go.opentelemetry.io/otel/trace v1.39.0/go.mod h1:88w4/PnZSazkGzz/w84VHpQafiU4EtqqlVdxWy+rNOA=
+go.opentelemetry.io/otel/trace v1.40.0/go.mod h1:zeAhriXecNGP/s2SEG3+Y8X9ujcJOTqQ5RgdEJcawiA=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
@@ -379,10 +374,10 @@ 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/api v0.0.0-20260209200024-4cfbd4190f57 h1:JLQynH/LBHfCTSbDWl+py8C+Rg/k1OVH3xfcaiANuF0=
+google.golang.org/genproto/googleapis/api v0.0.0-20260217215200-42d3e9bedb6d h1:EocjzKLywydp5uZ5tJ79iP6Q0UjDnyiHkGRWxuPBP8s=
-google.golang.org/genproto/googleapis/api v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:kSJwQxqmFXeo79zOmbrALdflXQeAYcUbgS7PbpMknCY=
+google.golang.org/genproto/googleapis/api v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:48U2I+QQUYhsFrg2SY6r+nJzeOtjey7j//WBESw+qyQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

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

@@ -179,6 +179,9 @@ func (i *Imp) Start() error {
 			gatewayservice.WithDriverRegistry(driverRegistry),
 			gatewayservice.WithSettings(cfg.Settings),
 		}
+		if cfg.Messaging != nil {
+			opts = append(opts, gatewayservice.WithMessagingSettings(cfg.Messaging.Settings))
+		}
 		svc := gatewayservice.NewService(logger, repo, producer, opts...)
 		i.service = svc
 		return svc, nil

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

@@ -9,6 +9,7 @@ import (
 	"github.com/tech/sendico/gateway/tron/internal/service/gateway/tronclient"
 	"github.com/tech/sendico/gateway/tron/shared"
 	clockpkg "github.com/tech/sendico/pkg/clock"
+	pmodel "github.com/tech/sendico/pkg/model"
 )
 
 // Option configures the Service.
@@ -98,3 +99,12 @@ func WithDiscoveryInvokeURI(invokeURI string) Option {
 		s.invokeURI = strings.TrimSpace(invokeURI)
 	}
 }
+
+// WithMessagingSettings applies messaging driver settings.
+func WithMessagingSettings(settings pmodel.SettingsT) Option {
+	return func(s *Service) {
+		if settings != nil {
+			s.msgCfg = settings
+		}
+	}
+}

api/gateway/tron/internal/service/gateway/outbox_reliable.go

@@ -0,0 +1,47 @@
+package gateway
+
+import (
+	"context"
+
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
+	"github.com/tech/sendico/pkg/db/transaction"
+	me "github.com/tech/sendico/pkg/messaging/envelope"
+)
+
+type tronOutboxProvider interface {
+	Outbox() gatewayoutbox.Store
+}
+
+type tronTransactionProvider interface {
+	TransactionFactory() transaction.Factory
+}
+
+func (s *Service) outboxStore() gatewayoutbox.Store {
+	provider, ok := s.storage.(tronOutboxProvider)
+	if !ok || provider == nil {
+		return nil
+	}
+	return provider.Outbox()
+}
+
+func (s *Service) startOutboxReliableProducer() error {
+	if s == nil || s.storage == nil {
+		return nil
+	}
+	return s.outbox.Start(s.logger, s.producer, s.outboxStore(), s.msgCfg)
+}
+
+func (s *Service) sendWithOutbox(ctx context.Context, env me.Envelope) error {
+	if err := s.startOutboxReliableProducer(); err != nil {
+		return err
+	}
+	return s.outbox.Send(ctx, env)
+}
+
+func (s *Service) executeTransaction(ctx context.Context, cb transaction.Callback) (any, error) {
+	provider, ok := s.storage.(tronTransactionProvider)
+	if !ok || provider == nil || provider.TransactionFactory() == nil {
+		return cb(ctx)
+	}
+	return provider.TransactionFactory().CreateTransaction().Execute(ctx, cb)
+}

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

@@ -3,6 +3,7 @@ package gateway
 import (
 	"context"
 
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/gateway/tron/internal/appversion"
 	"github.com/tech/sendico/gateway/tron/internal/keymanager"
 	"github.com/tech/sendico/gateway/tron/internal/service/gateway/commands"
@@ -19,9 +20,11 @@ import (
 	"github.com/tech/sendico/pkg/discovery"
 	msg "github.com/tech/sendico/pkg/messaging"
 	"github.com/tech/sendico/pkg/mlogger"
+	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
 	connectorv1 "github.com/tech/sendico/pkg/proto/connector/v1"
 	chainv1 "github.com/tech/sendico/pkg/proto/gateway/chain/v1"
+	"go.uber.org/zap"
 	"google.golang.org/grpc"
 )
 
@@ -40,9 +43,11 @@ type Service struct {
 	logger   mlogger.Logger
 	storage  storage.Repository
 	producer msg.Producer
+	msgCfg   pmodel.SettingsT
 	clock    clockpkg.Clock
 
 	settings CacheSettings
+	outbox   gatewayoutbox.ReliableRuntime
 
 	networks        map[string]shared.Network
 	serviceWallet   shared.ServiceWallet
@@ -64,6 +69,7 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 		logger:   logger.Named("service"),
 		storage:  repo,
 		producer: producer,
+		msgCfg:   map[string]any{},
 		clock:    clockpkg.System{},
 		settings: defaultSettings(),
 		networks: map[string]shared.Network{},
@@ -85,6 +91,9 @@ func NewService(logger mlogger.Logger, repo storage.Repository, producer msg.Pro
 	}
 	svc.settings = svc.settings.withDefaults()
 	svc.networkRegistry = rpcclient.NewRegistry(svc.networks, svc.rpcClients)
+	if err := svc.startOutboxReliableProducer(); err != nil {
+		svc.logger.Warn("Failed to initialise outbox reliable producer", zap.Error(err))
+	}
 
 	svc.commands = commands.NewRegistry(commands.RegistryDeps{
 		Wallet:   commandsWalletDeps(svc),
@@ -106,6 +115,7 @@ func (s *Service) Shutdown() {
 	if s == nil {
 		return
 	}
+	s.outbox.Stop()
 	for _, announcer := range s.announcers {
 		if announcer != nil {
 			announcer.Stop()

api/gateway/tron/internal/service/gateway/transfer_notifications.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"github.com/tech/sendico/gateway/tron/storage/model"
+	"github.com/tech/sendico/pkg/merrors"
 	paymentgateway "github.com/tech/sendico/pkg/messaging/notifications/paymentgateway"
 	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
@@ -13,6 +14,9 @@ import (
 )
 
 func isFinalStatus(t *model.Transfer) bool {
+	if t == nil {
+		return false
+	}
 	switch t.Status {
 	case model.TransferStatusFailed, model.TransferStatusSuccess, model.TransferStatusCancelled:
 		return true
@@ -21,16 +25,25 @@ func isFinalStatus(t *model.Transfer) bool {
 	}
 }
 
-func toOpStatus(t *model.Transfer) rail.OperationResult {
+func isFinalTransferStatus(status model.TransferStatus) bool {
+	switch status {
+	case model.TransferStatusFailed, model.TransferStatusSuccess, model.TransferStatusCancelled:
+		return true
+	default:
+		return false
+	}
+}
+
+func toOpStatus(t *model.Transfer) (rail.OperationResult, error) {
 	switch t.Status {
 	case model.TransferStatusFailed:
-		return rail.OperationResultFailed
+		return rail.OperationResultFailed, nil
 	case model.TransferStatusSuccess:
-		return rail.OperationResultSuccess
+		return rail.OperationResultSuccess, nil
 	case model.TransferStatusCancelled:
-		return rail.OperationResultCancelled
+		return rail.OperationResultCancelled, nil
 	default:
-		panic(fmt.Sprintf("toOpStatus: unexpected transfer status: %s", t.Status))
+		return rail.OperationResultFailed, merrors.InvalidArgument(fmt.Sprintf("unexpected transfer status: %s", t.Status), "transfer.status")
 	}
 }
 
@@ -45,19 +58,47 @@ func toError(t *model.Transfer) string {
 }
 
 func (s *Service) updateTransferStatus(ctx context.Context, transferRef string, status model.TransferStatus, failureReason, txHash string) (*model.Transfer, error) {
-	transfer, err := s.storage.Transfers().UpdateStatus(ctx, transferRef, status, failureReason, txHash)
+	if !isFinalTransferStatus(status) {
+		transfer, err := s.storage.Transfers().UpdateStatus(ctx, transferRef, status, failureReason, txHash)
+		if err != nil {
+			s.logger.Warn("Failed to update transfer status", zap.String("transfer_ref", transferRef), zap.String("status", string(status)), zap.Error(err))
+		}
+		return transfer, err
+	}
+
+	res, err := s.executeTransaction(ctx, func(txCtx context.Context) (any, error) {
+		transfer, statusErr := s.storage.Transfers().UpdateStatus(txCtx, transferRef, status, failureReason, txHash)
+		if statusErr != nil {
+			return nil, statusErr
+		}
+		if isFinalStatus(transfer) {
+			if emitErr := s.emitTransferStatusEvent(txCtx, transfer); emitErr != nil {
+				return nil, emitErr
+			}
+		}
+		return transfer, nil
+	})
 	if err != nil {
 		s.logger.Warn("Failed to update transfer status", zap.String("transfer_ref", transferRef), zap.String("status", string(status)), zap.Error(err))
+		return nil, err
 	}
-	if isFinalStatus(transfer) {
+
-		s.emitTransferStatusEvent(transfer)
+	transfer, _ := res.(*model.Transfer)
-	}
+	return transfer, nil
-	return transfer, err
 }
 
-func (s *Service) emitTransferStatusEvent(transfer *model.Transfer) {
+func (s *Service) emitTransferStatusEvent(ctx context.Context, transfer *model.Transfer) error {
-	if s == nil || s.producer == nil || transfer == nil {
+	if s == nil || transfer == nil {
-		return
+		return nil
+	}
+	if s.producer == nil || s.outboxStore() == nil {
+		return nil
+	}
+
+	status, err := toOpStatus(transfer)
+	if err != nil {
+		s.logger.Warn("Failed to map transfer status for transfer status event", zap.Error(err), zap.String("transfer_ref", transfer.TransferRef))
+		return err
 	}
 
 	exec := pmodel.PaymentGatewayExecution{
@@ -65,13 +106,15 @@ func (s *Service) emitTransferStatusEvent(transfer *model.Transfer) {
 		IdempotencyKey:  transfer.IdempotencyKey,
 		ExecutedMoney:   transfer.NetAmount,
 		PaymentRef:      transfer.PaymentRef,
-		Status:          toOpStatus(transfer),
+		Status:          status,
 		OperationRef:    transfer.OperationRef,
 		Error:           toError(transfer),
 		TransferRef:     transfer.TransferRef,
 	}
 	env := paymentgateway.PaymentGatewayExecution(mservice.ChainGateway, &exec)
-	if err := s.producer.SendMessage(env); err != nil {
+	if err := s.sendWithOutbox(ctx, env); err != nil {
 		s.logger.Warn("Failed to publish transfer status event", zap.Error(err), zap.String("transfer_ref", transfer.TransferRef))
+		return err
 	}
+	return nil
 }

api/gateway/tron/storage/mongo/repository.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"time"
 
+	gatewayoutbox "github.com/tech/sendico/gateway/common/outbox"
 	"github.com/tech/sendico/gateway/tron/storage"
 	"github.com/tech/sendico/gateway/tron/storage/mongo/store"
 	"github.com/tech/sendico/pkg/db"
+	"github.com/tech/sendico/pkg/db/transaction"
 	"github.com/tech/sendico/pkg/merrors"
 	"github.com/tech/sendico/pkg/mlogger"
 	"go.mongodb.org/mongo-driver/v2/mongo"
@@ -15,13 +17,15 @@ import (
 
 // Store implements storage.Repository backed by MongoDB.
 type Store struct {
-	logger mlogger.Logger
+	logger    mlogger.Logger
-	conn   *db.MongoConnection
+	conn      *db.MongoConnection
-	db     *mongo.Database
+	db        *mongo.Database
+	txFactory transaction.Factory
 
 	wallets   storage.WalletsStore
 	transfers storage.TransfersStore
 	deposits  storage.DepositsStore
+	outbox    gatewayoutbox.Store
 }
 
 // New creates a new Mongo-backed repository.
@@ -35,9 +39,10 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Store, error) {
 	}
 
 	result := &Store{
-		logger: logger.Named("storage").Named("mongo"),
+		logger:    logger.Named("storage").Named("mongo"),
-		conn:   conn,
+		conn:      conn,
-		db:     conn.Database(),
+		db:        conn.Database(),
+		txFactory: newMongoTransactionFactory(client),
 	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
@@ -63,10 +68,16 @@ func New(logger mlogger.Logger, conn *db.MongoConnection) (*Store, error) {
 		result.logger.Error("Failed to initialise deposits store", zap.Error(err))
 		return nil, err
 	}
+	outboxStore, err := gatewayoutbox.NewMongoStore(result.logger, result.db)
+	if err != nil {
+		result.logger.Error("Failed to initialise outbox store", zap.Error(err))
+		return nil, err
+	}
 
 	result.wallets = walletsStore
 	result.transfers = transfersStore
 	result.deposits = depositsStore
+	result.outbox = outboxStore
 
 	result.logger.Info("Chain gateway MongoDB storage initialised")
 	return result, nil
@@ -95,4 +106,12 @@ func (s *Store) Deposits() storage.DepositsStore {
 	return s.deposits
 }
 
+func (s *Store) Outbox() gatewayoutbox.Store {
+	return s.outbox
+}
+
+func (s *Store) TransactionFactory() transaction.Factory {
+	return s.txFactory
+}
+
 var _ storage.Repository = (*Store)(nil)

api/gateway/tron/storage/mongo/transaction.go

@@ -0,0 +1,38 @@
+package mongo
+
+import (
+	"context"
+
+	"github.com/tech/sendico/pkg/db/transaction"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+)
+
+type mongoTransactionFactory struct {
+	client *mongo.Client
+}
+
+func (f *mongoTransactionFactory) CreateTransaction() transaction.Transaction {
+	return &mongoTransaction{client: f.client}
+}
+
+type mongoTransaction struct {
+	client *mongo.Client
+}
+
+func (t *mongoTransaction) Execute(ctx context.Context, cb transaction.Callback) (any, error) {
+	session, err := t.client.StartSession()
+	if err != nil {
+		return nil, err
+	}
+	defer session.EndSession(ctx)
+
+	run := func(sessCtx context.Context) (any, error) {
+		return cb(sessCtx)
+	}
+
+	return session.WithTransaction(ctx, run)
+}
+
+func newMongoTransactionFactory(client *mongo.Client) transaction.Factory {
+	return &mongoTransactionFactory{client: client}
+}

api/ledger/config.dev.yml

@@ -34,6 +34,12 @@ messaging:
     max_reconnects: 10
     reconnect_wait: 5
     buffer_size: 1024
+    # Optional: remove this block to use package defaults.
+    reliable_publisher:
+      enabled: true
+      batch_size: 100
+      poll_interval_seconds: 1
+      max_attempts: 5
 
 fees:
   address: "dev-billing-fees:50060"

api/ledger/config.yml

@@ -34,6 +34,12 @@ messaging:
     max_reconnects: 10
     reconnect_wait: 5
     buffer_size: 1024
+    # Optional: remove this block to use package defaults.
+    reliable_publisher:
+      enabled: true
+      batch_size: 100
+      poll_interval_seconds: 1
+      max_attempts: 5
 
 fees:
   address: "sendico_billing_fees:50060"

api/ledger/go.mod

@@ -1,6 +1,6 @@
 module github.com/tech/sendico/ledger
 
-go 1.24.0
+go 1.25.0
 
 replace github.com/tech/sendico/pkg => ../pkg
 
@@ -49,5 +49,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 )

api/ledger/go.sum

@@ -210,8 +210,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

api/ledger/internal/model/outbox.go

@@ -1,35 +0,0 @@
-package ledger
-
-import (
-	"time"
-
-	"github.com/tech/sendico/pkg/db/storable"
-	"github.com/tech/sendico/pkg/mservice"
-)
-
-// Delivery status enum
-type OutboxStatus string
-
-const (
-	OutboxPending OutboxStatus = "pending"
-	OutboxSent    OutboxStatus = "sent"
-	OutboxFailed  OutboxStatus = "failed" // terminal after max retries, or keep pending with NextAttemptAt=nil
-)
-
-type OutboxEvent struct {
-	storable.Base `bson:",inline" json:",inline"`
-
-	EventID        string       `bson:"eventId"        json:"eventId"`                          // deterministic; use as NATS Msg-Id
-	Subject        string       `bson:"subject"        json:"subject"`                          // NATS subject / stream routing key
-	Payload        []byte       `bson:"payload"        json:"payload"`                          // JSON (or other) payload
-	Status         OutboxStatus `bson:"status"         json:"status"`                           // enum
-	Attempts       int          `bson:"attempts"       json:"attempts"`                         // total tries
-	NextAttemptAt  *time.Time   `bson:"nextAttemptAt,omitempty" json:"nextAttemptAt,omitempty"` // for backoff scheduler
-	SentAt         *time.Time   `bson:"sentAt,omitempty"        json:"sentAt,omitempty"`
-	LastError      string       `bson:"lastError,omitempty"     json:"lastError,omitempty"`       // brief reason of last failure
-	CorrelationRef string       `bson:"correlationRef,omitempty" json:"correlationRef,omitempty"` // e.g., journalEntryRef or idempotencyKey
-}
-
-func (o *OutboxEvent) Collection() string {
-	return mservice.LedgerOutbox
-}

api/ledger/internal/server/internal/serverimp.go

@@ -120,7 +120,14 @@ func (i *Imp) Start() error {
 		if cfg.GRPC != nil {
 			invokeURI = cfg.GRPC.DiscoveryInvokeURI()
 		}
-		svc := ledger.NewService(logger, repo, producer, feesClient, feesTimeout, invokeURI)
+		msgSettings := map[string]any(nil)
+		if cfg.Messaging != nil {
+			msgSettings = cfg.Messaging.Settings
+		}
+		svc, err := ledger.NewService(logger, repo, producer, msgSettings, feesClient, feesTimeout, invokeURI)
+		if err != nil {
+			return nil, err
+		}
 		if err := svc.EnsureSystemAccounts(context.Background()); err != nil {
 			return nil, err
 		}

api/ledger/internal/service/ledger/account_status.go

@@ -38,7 +38,7 @@ func (s *Service) blockAccountResponder(_ context.Context, req *ledgerv1.BlockAc
 			if err == storage.ErrAccountNotFound {
 				return nil, merrors.NoData("account not found")
 			}
-			logger.Warn("failed to get account for block", zap.Error(err))
+			logger.Warn("Failed to get account for block", zap.Error(err))
 			return nil, merrors.Internal("failed to get account")
 		}
 
@@ -61,17 +61,17 @@ func (s *Service) blockAccountResponder(_ context.Context, req *ledgerv1.BlockAc
 		}
 
 		if account.Status == pmodel.LedgerAccountStatusFrozen {
-			logger.Debug("account already frozen", mzap.AccRef(accountRef))
+			logger.Debug("Account already frozen", mzap.AccRef(accountRef))
 			return &ledgerv1.BlockAccountResponse{Account: toProtoAccount(account)}, nil
 		}
 
 		if err := s.storage.Accounts().UpdateStatus(ctx, accountRef, pmodel.LedgerAccountStatusFrozen); err != nil {
-			logger.Warn("failed to freeze account", zap.Error(err))
+			logger.Warn("Failed to freeze account", zap.Error(err))
 			return nil, merrors.Internal("failed to block account")
 		}
 
 		account.Status = pmodel.LedgerAccountStatusFrozen
-		logger.Info("account blocked (frozen)", mzap.AccRef(accountRef))
+		logger.Info("Account blocked (frozen)", mzap.AccRef(accountRef))
 		return &ledgerv1.BlockAccountResponse{Account: toProtoAccount(account)}, nil
 	}
 }
@@ -101,7 +101,7 @@ func (s *Service) unblockAccountResponder(_ context.Context, req *ledgerv1.Unblo
 			if err == storage.ErrAccountNotFound {
 				return nil, merrors.NoData("account not found")
 			}
-			logger.Warn("failed to get account for unblock", zap.Error(err))
+			logger.Warn("Failed to get account for unblock", zap.Error(err))
 			return nil, merrors.Internal("failed to get account")
 		}
 
@@ -124,17 +124,17 @@ func (s *Service) unblockAccountResponder(_ context.Context, req *ledgerv1.Unblo
 		}
 
 		if account.Status == pmodel.LedgerAccountStatusActive {
-			logger.Debug("account already active", mzap.AccRef(accountRef))
+			logger.Debug("Account already active", mzap.AccRef(accountRef))
 			return &ledgerv1.UnblockAccountResponse{Account: toProtoAccount(account)}, nil
 		}
 
 		if err := s.storage.Accounts().UpdateStatus(ctx, accountRef, pmodel.LedgerAccountStatusActive); err != nil {
-			logger.Warn("failed to activate account", zap.Error(err))
+			logger.Warn("Failed to activate account", zap.Error(err))
 			return nil, merrors.Internal("failed to unblock account")
 		}
 
 		account.Status = pmodel.LedgerAccountStatusActive
-		logger.Info("account unblocked (active)", mzap.AccRef(accountRef))
+		logger.Info("Account unblocked (active)", mzap.AccRef(accountRef))
 		return &ledgerv1.UnblockAccountResponse{Account: toProtoAccount(account)}, nil
 	}
 }

api/ledger/internal/service/ledger/list_accounts.go

@@ -48,7 +48,7 @@ func (s *Service) listAccountsResponder(_ context.Context, req *ledgerv1.ListAcc
 		// No pagination requested; return all accounts for the organization.
 		accounts, err := s.storage.Accounts().ListByOrganization(ctx, orgRef, filter, 0, 0)
 		if err != nil {
-			s.logger.Warn("failed to list ledger accounts", zap.Error(err), mzap.ObjRef("organization_ref", orgRef))
+			s.logger.Warn("Failed to list ledger accounts", zap.Error(err), mzap.ObjRef("organization_ref", orgRef))
 			return nil, err
 		}
 

api/ledger/internal/service/ledger/outbox_publisher.go

@@ -1,207 +0,0 @@
-package ledger
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"time"
-
-	"github.com/tech/sendico/ledger/storage"
-	ledgerModel "github.com/tech/sendico/ledger/storage/model"
-	"github.com/tech/sendico/pkg/merrors"
-	pmessaging "github.com/tech/sendico/pkg/messaging"
-	me "github.com/tech/sendico/pkg/messaging/envelope"
-	"github.com/tech/sendico/pkg/mlogger"
-	domainmodel "github.com/tech/sendico/pkg/model"
-	notification "github.com/tech/sendico/pkg/model/notification"
-	"github.com/tech/sendico/pkg/mservice"
-	"go.uber.org/zap"
-)
-
-const (
-	defaultOutboxBatchSize    = 100
-	defaultOutboxPollInterval = time.Second
-	maxOutboxDeliveryAttempts = 5
-	outboxPublisherSender     = "ledger.outbox.publisher"
-)
-
-type outboxPublisher struct {
-	logger   mlogger.Logger
-	store    storage.OutboxStore
-	producer pmessaging.Producer
-
-	batchSize    int
-	pollInterval time.Duration
-}
-
-func newOutboxPublisher(logger mlogger.Logger, store storage.OutboxStore, producer pmessaging.Producer) *outboxPublisher {
-	return &outboxPublisher{
-		logger:       logger.Named("outbox.publisher"),
-		store:        store,
-		producer:     producer,
-		batchSize:    defaultOutboxBatchSize,
-		pollInterval: defaultOutboxPollInterval,
-	}
-}
-
-func (p *outboxPublisher) run(ctx context.Context) {
-	p.logger.Info("started")
-	defer p.logger.Info("stopped")
-
-	for {
-		if ctx.Err() != nil {
-			return
-		}
-
-		processed, err := p.dispatchPending(ctx)
-		if err != nil && !errors.Is(err, context.Canceled) {
-			p.logger.Warn("failed to dispatch ledger outbox events", zap.Error(err))
-		}
-		if processed > 0 {
-			p.logger.Debug("dispatched ledger outbox events",
-				zap.Int("count", processed),
-				zap.Int("batch_size", p.batchSize))
-		}
-
-		if ctx.Err() != nil {
-			return
-		}
-
-		if processed == 0 {
-			select {
-			case <-ctx.Done():
-				return
-			case <-time.After(p.pollInterval):
-			}
-		}
-	}
-}
-
-func (p *outboxPublisher) dispatchPending(ctx context.Context) (int, error) {
-	if p.store == nil || p.producer == nil {
-		return 0, nil
-	}
-
-	events, err := p.store.ListPending(ctx, p.batchSize)
-	if err != nil {
-		return 0, err
-	}
-
-	for _, event := range events {
-		if ctx.Err() != nil {
-			return len(events), ctx.Err()
-		}
-		if err := p.publishEvent(ctx, event); err != nil {
-			if errors.Is(err, context.Canceled) {
-				return len(events), err
-			}
-			p.logger.Warn("failed to publish outbox event",
-				zap.Error(err),
-				zap.String("eventId", event.EventID),
-				zap.String("subject", event.Subject),
-				zap.String("organizationRef", event.OrganizationRef.Hex()),
-				zap.Int("attempts", event.Attempts))
-			p.handleFailure(ctx, event)
-			continue
-		}
-		if err := p.markSent(ctx, event); err != nil {
-			if errors.Is(err, context.Canceled) {
-				return len(events), err
-			}
-			p.logger.Warn("failed to mark outbox event as sent",
-				zap.Error(err),
-				zap.String("eventId", event.EventID),
-				zap.String("subject", event.Subject),
-				zap.String("organizationRef", event.OrganizationRef.Hex()))
-		} else {
-			p.logger.Debug("outbox event marked sent",
-				zap.String("eventId", event.EventID),
-				zap.String("subject", event.Subject),
-				zap.String("organizationRef", event.OrganizationRef.Hex()))
-		}
-	}
-
-	return len(events), nil
-}
-
-func (p *outboxPublisher) publishEvent(_ context.Context, event *ledgerModel.OutboxEvent) error {
-	docID := event.GetID()
-	if docID == nil || docID.IsZero() {
-		return merrors.InvalidArgument("outbox event missing identifier")
-	}
-
-	payload, err := p.wrapPayload(event)
-	if err != nil {
-		return err
-	}
-
-	env := me.CreateEnvelope(outboxPublisherSender, domainmodel.NewNotification(mservice.LedgerOutbox, notification.NASent))
-	if _, err = env.Wrap(payload); err != nil {
-		return err
-	}
-
-	return p.producer.SendMessage(env)
-}
-
-func (p *outboxPublisher) wrapPayload(event *ledgerModel.OutboxEvent) ([]byte, error) {
-	message := ledgerOutboxMessage{
-		EventID:         event.EventID,
-		Subject:         event.Subject,
-		Payload:         json.RawMessage(event.Payload),
-		Attempts:        event.Attempts,
-		OrganizationRef: event.OrganizationRef.Hex(),
-		CreatedAt:       event.CreatedAt,
-	}
-	return json.Marshal(message)
-}
-
-func (p *outboxPublisher) markSent(ctx context.Context, event *ledgerModel.OutboxEvent) error {
-	eventRef := event.GetID()
-	if eventRef == nil || eventRef.IsZero() {
-		return merrors.InvalidArgument("outbox event missing identifier")
-	}
-
-	return p.store.MarkSent(ctx, *eventRef, time.Now().UTC())
-}
-
-func (p *outboxPublisher) handleFailure(ctx context.Context, event *ledgerModel.OutboxEvent) {
-	eventRef := event.GetID()
-	if eventRef == nil || eventRef.IsZero() {
-		p.logger.Warn("cannot record outbox failure: missing identifier", zap.String("eventId", event.EventID))
-		return
-	}
-
-	if err := p.store.IncrementAttempts(ctx, *eventRef); err != nil && !errors.Is(err, context.Canceled) {
-		p.logger.Warn("failed to increment outbox attempts",
-			zap.Error(err),
-			zap.String("eventId", event.EventID),
-			zap.String("subject", event.Subject),
-			zap.String("organizationRef", event.OrganizationRef.Hex()))
-	}
-
-	if event.Attempts+1 >= maxOutboxDeliveryAttempts {
-		if err := p.store.MarkFailed(ctx, *eventRef); err != nil && !errors.Is(err, context.Canceled) {
-			p.logger.Warn("failed to mark outbox event failed",
-				zap.Error(err),
-				zap.String("eventId", event.EventID),
-				zap.String("subject", event.Subject),
-				zap.String("organizationRef", event.OrganizationRef.Hex()),
-				zap.Int("attempts", event.Attempts+1))
-		} else {
-			p.logger.Warn("ledger outbox event marked as failed",
-				zap.String("eventId", event.EventID),
-				zap.String("subject", event.Subject),
-				zap.String("organizationRef", event.OrganizationRef.Hex()),
-				zap.Int("attempts", event.Attempts+1))
-		}
-	}
-}
-
-type ledgerOutboxMessage struct {
-	EventID         string          `json:"eventId"`
-	Subject         string          `json:"subject"`
-	Payload         json.RawMessage `json:"payload"`
-	Attempts        int             `json:"attempts"`
-	OrganizationRef string          `json:"organizationRef"`
-	CreatedAt       time.Time       `json:"createdAt"`
-}

api/ledger/internal/service/ledger/outbox_reliable.go

@@ -0,0 +1,168 @@
+package ledger
+
+import (
+	"context"
+	"encoding/json"
+	"strings"
+	"time"
+
+	"github.com/tech/sendico/ledger/storage"
+	"github.com/tech/sendico/ledger/storage/model"
+	pmessaging "github.com/tech/sendico/pkg/messaging"
+	me "github.com/tech/sendico/pkg/messaging/envelope"
+	pmessagingreliable "github.com/tech/sendico/pkg/messaging/reliable"
+	"github.com/tech/sendico/pkg/mlogger"
+	cfgmodel "github.com/tech/sendico/pkg/model"
+	domainmodel "github.com/tech/sendico/pkg/model"
+	notification "github.com/tech/sendico/pkg/model/notification"
+	"github.com/tech/sendico/pkg/mservice"
+)
+
+const (
+	outboxPublisherSender = "ledger.outbox.publisher"
+)
+
+type ledgerOutboxMessage struct {
+	EventID         string          `json:"eventId"`
+	Subject         string          `json:"subject"`
+	Payload         json.RawMessage `json:"payload"`
+	Attempts        int             `json:"attempts"`
+	OrganizationRef string          `json:"organizationRef"`
+	CreatedAt       time.Time       `json:"createdAt"`
+}
+
+type ledgerOutboxStoreAdapter struct {
+	store storage.OutboxStore
+}
+
+func newLedgerReliableProducer(logger mlogger.Logger, direct pmessaging.Producer, store storage.OutboxStore, messagingSettings cfgmodel.SettingsT) (*pmessagingreliable.ReliableProducer, pmessagingreliable.Settings, error) {
+	if store == nil {
+		return nil, pmessagingreliable.DefaultSettings(), nil
+	}
+	producer, settings, err := pmessagingreliable.NewReliableProducerFromConfig(logger, direct, &ledgerOutboxStoreAdapter{store: store}, messagingSettings,
+		pmessagingreliable.WithEnvelopeDecoder(ledgerOutboxDecoder),
+	)
+	if err != nil {
+		return nil, pmessagingreliable.Settings{}, err
+	}
+	return producer, settings, nil
+}
+
+func (a *ledgerOutboxStoreAdapter) Enqueue(ctx context.Context, msg pmessagingreliable.OutboxMessage) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	event := &model.OutboxEvent{
+		EventID:  strings.TrimSpace(msg.EventID),
+		Subject:  strings.TrimSpace(msg.Subject),
+		Payload:  append([]byte(nil), msg.Payload...),
+		Status:   model.OutboxStatusPending,
+		Attempts: msg.Attempts,
+	}
+	if organizationRef := strings.TrimSpace(msg.OrganizationRef); organizationRef != "" {
+		orgRef, err := parseObjectID(organizationRef)
+		if err != nil {
+			return err
+		}
+		event.OrganizationRef = orgRef
+	}
+	return a.store.Create(ctx, event)
+}
+
+func (a *ledgerOutboxStoreAdapter) ListPending(ctx context.Context, limit int) ([]pmessagingreliable.OutboxMessage, error) {
+	if a == nil || a.store == nil {
+		return nil, nil
+	}
+	events, err := a.store.ListPending(ctx, limit)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make([]pmessagingreliable.OutboxMessage, 0, len(events))
+	for _, event := range events {
+		if event == nil {
+			continue
+		}
+		reference := ""
+		if eventRef := event.GetID(); eventRef != nil && !eventRef.IsZero() {
+			reference = eventRef.Hex()
+		}
+		result = append(result, pmessagingreliable.OutboxMessage{
+			Reference:       reference,
+			EventID:         strings.TrimSpace(event.EventID),
+			Subject:         strings.TrimSpace(event.Subject),
+			Payload:         append([]byte(nil), event.Payload...),
+			Attempts:        event.Attempts,
+			OrganizationRef: event.OrganizationRef.Hex(),
+			CreatedAt:       event.CreatedAt,
+		})
+	}
+
+	return result, nil
+}
+
+func (a *ledgerOutboxStoreAdapter) MarkSent(ctx context.Context, reference string, sentAt time.Time) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	eventRef, err := parseObjectID(strings.TrimSpace(reference))
+	if err != nil {
+		return err
+	}
+	return a.store.MarkSent(ctx, eventRef, sentAt)
+}
+
+func (a *ledgerOutboxStoreAdapter) MarkFailed(ctx context.Context, reference string) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	eventRef, err := parseObjectID(strings.TrimSpace(reference))
+	if err != nil {
+		return err
+	}
+	return a.store.MarkFailed(ctx, eventRef)
+}
+
+func (a *ledgerOutboxStoreAdapter) IncrementAttempts(ctx context.Context, reference string) error {
+	if a == nil || a.store == nil {
+		return nil
+	}
+	eventRef, err := parseObjectID(strings.TrimSpace(reference))
+	if err != nil {
+		return err
+	}
+	return a.store.IncrementAttempts(ctx, eventRef)
+}
+
+func ledgerOutboxDecoder(record pmessagingreliable.OutboxMessage) (me.Envelope, error) {
+	env, err := me.Deserialize(record.Payload)
+	if err == nil {
+		return env, nil
+	}
+	if strings.TrimSpace(record.Subject) != ledgerOutboxSubject {
+		return nil, err
+	}
+	return buildLedgerOutboxEnvelope(record.EventID, record.Payload, record.Attempts, record.OrganizationRef, record.CreatedAt)
+}
+
+func buildLedgerOutboxEnvelope(eventID string, payload []byte, attempts int, organizationRef string, createdAt time.Time) (me.Envelope, error) {
+	msg := ledgerOutboxMessage{
+		EventID:         strings.TrimSpace(eventID),
+		Subject:         ledgerOutboxSubject,
+		Payload:         append([]byte(nil), payload...),
+		Attempts:        attempts,
+		OrganizationRef: strings.TrimSpace(organizationRef),
+		CreatedAt:       createdAt,
+	}
+
+	body, err := json.Marshal(msg)
+	if err != nil {
+		return nil, err
+	}
+
+	env := me.CreateEnvelope(outboxPublisherSender, domainmodel.NewNotification(mservice.LedgerOutbox, notification.NASent))
+	if _, err = env.Wrap(body); err != nil {
+		return nil, err
+	}
+	return env, nil
+}

api/ledger/internal/service/ledger/outbox_reliable_test.go

@@ -12,33 +12,35 @@ import (
 	"github.com/stretchr/testify/require"
 	"github.com/tech/sendico/ledger/storage/model"
 	me "github.com/tech/sendico/pkg/messaging/envelope"
+	pmessagingreliable "github.com/tech/sendico/pkg/messaging/reliable"
 	"go.mongodb.org/mongo-driver/v2/bson"
 	"go.uber.org/zap"
 )
 
-func TestOutboxPublisherDispatchSuccess(t *testing.T) {
+func TestLedgerReliableProducerDispatchesLegacyOutboxRecords(t *testing.T) {
 	logger := zap.NewNop()
 	event := &model.OutboxEvent{
 		EventID:  "entry-1",
-		Subject:  "ledger.entry.posted",
+		Subject:  ledgerOutboxSubject,
 		Payload:  []byte(`{"journalEntryRef":"abc123"}`),
 		Attempts: 0,
 	}
 	event.SetID(bson.NewObjectID())
 	event.OrganizationRef = bson.NewObjectID()
 
-	store := &recordingOutboxStore{
+	store := &recordingLedgerOutboxStore{
 		pending: []*model.OutboxEvent{event},
 	}
-	producer := &stubProducer{}
+	direct := &stubDirectProducer{}
-	publisher := newOutboxPublisher(logger, store, producer)
+	producer, _, err := newLedgerReliableProducer(logger, direct, store, nil)
+	require.NoError(t, err)
 
-	processed, err := publisher.dispatchPending(context.Background())
+	processed, err := producer.DispatchPending(context.Background())
 	require.NoError(t, err)
 	assert.Equal(t, 1, processed)
 
-	require.Len(t, producer.envelopes, 1)
+	require.Len(t, direct.envelopes, 1)
-	env := producer.envelopes[0]
+	env := direct.envelopes[0]
 	assert.Equal(t, outboxPublisherSender, env.GetSender())
 	assert.Equal(t, "ledger_outbox_sent", env.GetSignature().ToString())
 
@@ -47,6 +49,7 @@ func TestOutboxPublisherDispatchSuccess(t *testing.T) {
 	assert.Equal(t, event.EventID, message.EventID)
 	assert.Equal(t, event.Subject, message.Subject)
 	assert.Equal(t, event.OrganizationRef.Hex(), message.OrganizationRef)
+	assert.JSONEq(t, `{"journalEntryRef":"abc123"}`, string(message.Payload))
 
 	require.Len(t, store.markedSent, 1)
 	assert.Equal(t, *event.GetID(), store.markedSent[0])
@@ -54,37 +57,36 @@ func TestOutboxPublisherDispatchSuccess(t *testing.T) {
 	assert.Empty(t, store.incremented)
 }
 
-func TestOutboxPublisherDispatchFailureMarksAttempts(t *testing.T) {
+func TestLedgerReliableProducerMarksFailedOnDispatchError(t *testing.T) {
 	logger := zap.NewNop()
 	event := &model.OutboxEvent{
 		EventID:  "entry-2",
-		Subject:  "ledger.entry.posted",
+		Subject:  ledgerOutboxSubject,
 		Payload:  []byte(`{"journalEntryRef":"xyz789"}`),
-		Attempts: maxOutboxDeliveryAttempts - 1,
+		Attempts: pmessagingreliable.DefaultSettings().MaxAttempts - 1,
 	}
 	event.SetID(bson.NewObjectID())
 	event.OrganizationRef = bson.NewObjectID()
 
-	store := &recordingOutboxStore{
+	store := &recordingLedgerOutboxStore{
 		pending: []*model.OutboxEvent{event},
 	}
-	producer := &stubProducer{err: errors.New("publish failed")}
+	direct := &stubDirectProducer{err: errors.New("publish failed")}
-	publisher := newOutboxPublisher(logger, store, producer)
+	producer, _, err := newLedgerReliableProducer(logger, direct, store, nil)
+	require.NoError(t, err)
 
-	processed, err := publisher.dispatchPending(context.Background())
+	processed, err := producer.DispatchPending(context.Background())
 	require.NoError(t, err)
 	assert.Equal(t, 1, processed)
 
 	require.Len(t, store.incremented, 1)
 	assert.Equal(t, *event.GetID(), store.incremented[0])
-
 	require.Len(t, store.markedFailed, 1)
 	assert.Equal(t, *event.GetID(), store.markedFailed[0])
-
 	assert.Empty(t, store.markedSent)
 }
 
-type recordingOutboxStore struct {
+type recordingLedgerOutboxStore struct {
 	mu sync.Mutex
 
 	pending []*model.OutboxEvent
@@ -94,11 +96,11 @@ type recordingOutboxStore struct {
 	incremented  []bson.ObjectID
 }
 
-func (s *recordingOutboxStore) Create(context.Context, *model.OutboxEvent) error {
+func (s *recordingLedgerOutboxStore) Create(context.Context, *model.OutboxEvent) error {
 	return nil
 }
 
-func (s *recordingOutboxStore) ListPending(context.Context, int) ([]*model.OutboxEvent, error) {
+func (s *recordingLedgerOutboxStore) ListPending(context.Context, int) ([]*model.OutboxEvent, error) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	events := s.pending
@@ -106,35 +108,34 @@ func (s *recordingOutboxStore) ListPending(context.Context, int) ([]*model.Outbo
 	return events, nil
 }
 
-func (s *recordingOutboxStore) MarkSent(_ context.Context, eventRef bson.ObjectID, sentAt time.Time) error {
+func (s *recordingLedgerOutboxStore) MarkSent(_ context.Context, eventRef bson.ObjectID, _ time.Time) error {
-	_ = sentAt
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	s.markedSent = append(s.markedSent, eventRef)
 	return nil
 }
 
-func (s *recordingOutboxStore) MarkFailed(_ context.Context, eventRef bson.ObjectID) error {
+func (s *recordingLedgerOutboxStore) MarkFailed(_ context.Context, eventRef bson.ObjectID) error {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	s.markedFailed = append(s.markedFailed, eventRef)
 	return nil
 }
 
-func (s *recordingOutboxStore) IncrementAttempts(_ context.Context, eventRef bson.ObjectID) error {
+func (s *recordingLedgerOutboxStore) IncrementAttempts(_ context.Context, eventRef bson.ObjectID) error {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	s.incremented = append(s.incremented, eventRef)
 	return nil
 }
 
-type stubProducer struct {
+type stubDirectProducer struct {
 	mu        sync.Mutex
 	envelopes []me.Envelope
 	err       error
 }
 
-func (p *stubProducer) SendMessage(env me.Envelope) error {
+func (p *stubDirectProducer) SendMessage(env me.Envelope) error {
 	p.mu.Lock()
 	defer p.mu.Unlock()
 	p.envelopes = append(p.envelopes, env)

api/ledger/internal/service/ledger/posting.go

@@ -66,7 +66,7 @@ func (s *Service) postCreditResponder(_ context.Context, req *ledgerv1.PostCredi
 		existingEntry, err := s.storage.JournalEntries().GetByIdempotencyKey(ctx, orgRef, req.IdempotencyKey)
 		if err == nil && existingEntry != nil {
 			recordDuplicateRequest("credit")
-			logger.Info("duplicate credit request (idempotency)",
+			logger.Info("Duplicate credit request (idempotency)",
 				zap.String("existingEntryID", existingEntry.GetID().Hex()))
 			return &ledgerv1.PostResponse{
 				JournalEntryRef: existingEntry.GetID().Hex(),
@@ -76,7 +76,7 @@ func (s *Service) postCreditResponder(_ context.Context, req *ledgerv1.PostCredi
 		}
 		if err != nil && err != storage.ErrJournalEntryNotFound {
 			recordJournalEntryError("credit", "idempotency_check_failed")
-			logger.Warn("failed to check idempotency", zap.Error(err))
+			logger.Warn("Failed to check idempotency", zap.Error(err))
 			return nil, merrors.Internal("failed to check idempotency")
 		}
 
@@ -99,7 +99,7 @@ func (s *Service) postCreditResponder(_ context.Context, req *ledgerv1.PostCredi
 		charges := req.Charges
 		if len(charges) == 0 {
 			if computed, err := s.quoteFeesForCredit(ctx, req); err != nil {
-				logger.Warn("failed to quote fees", zap.Error(err))
+				logger.Warn("Failed to quote fees", zap.Error(err))
 			} else if len(computed) > 0 {
 				charges = computed
 			}
@@ -133,7 +133,7 @@ func (s *Service) postCreditResponder(_ context.Context, req *ledgerv1.PostCredi
 				if err == storage.ErrAccountNotFound {
 					return nil, merrors.NoData(fmt.Sprintf("charges[%d]: account not found", i))
 				}
-				logger.Warn("failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
+				logger.Warn("Failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
 				return nil, merrors.Internal("failed to get charge account")
 			}
 			if err := validateAccountForOrg(chargeAccount, orgRef, charge.Money.Currency); err != nil {
@@ -199,7 +199,7 @@ func (s *Service) postCreditResponder(_ context.Context, req *ledgerv1.PostCredi
 			entry.OrganizationRef = orgRef
 
 			if err := s.storage.JournalEntries().Create(txCtx, entry); err != nil {
-				logger.Warn("failed to create journal entry", zap.Error(err))
+				logger.Warn("Failed to create journal entry", zap.Error(err))
 				return nil, merrors.Internal("failed to create journal entry")
 			}
 
@@ -217,7 +217,7 @@ func (s *Service) postCreditResponder(_ context.Context, req *ledgerv1.PostCredi
 			}
 
 			if err := s.storage.PostingLines().CreateMany(txCtx, postingLines); err != nil {
-				logger.Warn("failed to create posting lines", zap.Error(err))
+				logger.Warn("Failed to create posting lines", zap.Error(err))
 				return nil, merrors.Internal("failed to create posting lines")
 			}
 

api/ledger/internal/service/ledger/posting_debit.go

@@ -64,7 +64,7 @@ func (s *Service) postDebitResponder(_ context.Context, req *ledgerv1.PostDebitR
 		existingEntry, err := s.storage.JournalEntries().GetByIdempotencyKey(ctx, orgRef, req.IdempotencyKey)
 		if err == nil && existingEntry != nil {
 			recordDuplicateRequest("debit")
-			logger.Info("duplicate debit request (idempotency)",
+			logger.Info("Duplicate debit request (idempotency)",
 				zap.String("existingEntryID", existingEntry.GetID().Hex()))
 			return &ledgerv1.PostResponse{
 				JournalEntryRef: existingEntry.GetID().Hex(),
@@ -73,7 +73,7 @@ func (s *Service) postDebitResponder(_ context.Context, req *ledgerv1.PostDebitR
 			}, nil
 		}
 		if err != nil && err != storage.ErrJournalEntryNotFound {
-			logger.Warn("failed to check idempotency", zap.Error(err))
+			logger.Warn("Failed to check idempotency", zap.Error(err))
 			return nil, merrors.Internal("failed to check idempotency")
 		}
 
@@ -96,7 +96,7 @@ func (s *Service) postDebitResponder(_ context.Context, req *ledgerv1.PostDebitR
 		charges := req.Charges
 		if len(charges) == 0 {
 			if computed, err := s.quoteFeesForDebit(ctx, req); err != nil {
-				logger.Warn("failed to quote fees", zap.Error(err))
+				logger.Warn("Failed to quote fees", zap.Error(err))
 			} else if len(computed) > 0 {
 				charges = computed
 			}
@@ -130,7 +130,7 @@ func (s *Service) postDebitResponder(_ context.Context, req *ledgerv1.PostDebitR
 				if err == storage.ErrAccountNotFound {
 					return nil, merrors.NoData(fmt.Sprintf("charges[%d]: account not found", i))
 				}
-				logger.Warn("failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
+				logger.Warn("Failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
 				return nil, merrors.Internal("failed to get charge account")
 			}
 			if err := validateAccountForOrg(chargeAccount, orgRef, charge.Money.Currency); err != nil {
@@ -196,7 +196,7 @@ func (s *Service) postDebitResponder(_ context.Context, req *ledgerv1.PostDebitR
 			entry.OrganizationRef = orgRef
 
 			if err := s.storage.JournalEntries().Create(txCtx, entry); err != nil {
-				logger.Warn("failed to create journal entry", zap.Error(err))
+				logger.Warn("Failed to create journal entry", zap.Error(err))
 				return nil, merrors.Internal("failed to create journal entry")
 			}
 
@@ -214,7 +214,7 @@ func (s *Service) postDebitResponder(_ context.Context, req *ledgerv1.PostDebitR
 			}
 
 			if err := s.storage.PostingLines().CreateMany(txCtx, postingLines); err != nil {
-				logger.Warn("failed to create posting lines", zap.Error(err))
+				logger.Warn("Failed to create posting lines", zap.Error(err))
 				return nil, merrors.Internal("failed to create posting lines")
 			}
 

api/ledger/internal/service/ledger/posting_external.go

@@ -61,7 +61,7 @@ func (s *Service) postExternalCreditResponder(_ context.Context, req *ledgerv1.P
 		existingEntry, err := s.storage.JournalEntries().GetByIdempotencyKey(ctx, orgRef, req.IdempotencyKey)
 		if err == nil && existingEntry != nil {
 			recordDuplicateRequest("credit")
-			logger.Info("duplicate external credit request (idempotency)",
+			logger.Info("Duplicate external credit request (idempotency)",
 				zap.String("existingEntryID", existingEntry.GetID().Hex()))
 			return &ledgerv1.PostResponse{
 				JournalEntryRef: existingEntry.GetID().Hex(),
@@ -71,7 +71,7 @@ func (s *Service) postExternalCreditResponder(_ context.Context, req *ledgerv1.P
 		}
 		if err != nil && err != storage.ErrJournalEntryNotFound {
 			recordJournalEntryError("credit", "idempotency_check_failed")
-			logger.Warn("failed to check idempotency", zap.Error(err))
+			logger.Warn("Failed to check idempotency", zap.Error(err))
 			return nil, merrors.Internal("failed to check idempotency")
 		}
 
@@ -113,7 +113,7 @@ func (s *Service) postExternalCreditResponder(_ context.Context, req *ledgerv1.P
 		charges := req.Charges
 		if len(charges) == 0 {
 			if computed, err := s.quoteFeesForCredit(ctx, req); err != nil {
-				logger.Warn("failed to quote fees", zap.Error(err))
+				logger.Warn("Failed to quote fees", zap.Error(err))
 			} else if len(computed) > 0 {
 				charges = computed
 			}
@@ -147,7 +147,7 @@ func (s *Service) postExternalCreditResponder(_ context.Context, req *ledgerv1.P
 				if err == storage.ErrAccountNotFound {
 					return nil, merrors.NoData(fmt.Sprintf("charges[%d]: account not found", i))
 				}
-				logger.Warn("failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
+				logger.Warn("Failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
 				return nil, merrors.Internal("failed to get charge account")
 			}
 			if err := validateAccountForOrg(chargeAccount, orgRef, charge.Money.Currency); err != nil {
@@ -202,7 +202,7 @@ func (s *Service) postExternalCreditResponder(_ context.Context, req *ledgerv1.P
 			entry.OrganizationRef = orgRef
 
 			if err := s.storage.JournalEntries().Create(txCtx, entry); err != nil {
-				logger.Warn("failed to create journal entry", zap.Error(err))
+				logger.Warn("Failed to create journal entry", zap.Error(err))
 				return nil, merrors.Internal("failed to create journal entry")
 			}
 
@@ -220,7 +220,7 @@ func (s *Service) postExternalCreditResponder(_ context.Context, req *ledgerv1.P
 			}
 
 			if err := s.storage.PostingLines().CreateMany(txCtx, postingLines); err != nil {
-				logger.Warn("failed to create posting lines", zap.Error(err))
+				logger.Warn("Failed to create posting lines", zap.Error(err))
 				return nil, merrors.Internal("failed to create posting lines")
 			}
 
@@ -294,7 +294,7 @@ func (s *Service) postExternalDebitResponder(_ context.Context, req *ledgerv1.Po
 		existingEntry, err := s.storage.JournalEntries().GetByIdempotencyKey(ctx, orgRef, req.IdempotencyKey)
 		if err == nil && existingEntry != nil {
 			recordDuplicateRequest("debit")
-			logger.Info("duplicate external debit request (idempotency)",
+			logger.Info("Duplicate external debit request (idempotency)",
 				zap.String("existingEntryID", existingEntry.GetID().Hex()))
 			return &ledgerv1.PostResponse{
 				JournalEntryRef: existingEntry.GetID().Hex(),
@@ -304,7 +304,7 @@ func (s *Service) postExternalDebitResponder(_ context.Context, req *ledgerv1.Po
 		}
 		if err != nil && err != storage.ErrJournalEntryNotFound {
 			recordJournalEntryError("debit", "idempotency_check_failed")
-			logger.Warn("failed to check idempotency", zap.Error(err))
+			logger.Warn("Failed to check idempotency", zap.Error(err))
 			return nil, merrors.Internal("failed to check idempotency")
 		}
 
@@ -346,7 +346,7 @@ func (s *Service) postExternalDebitResponder(_ context.Context, req *ledgerv1.Po
 		charges := req.Charges
 		if len(charges) == 0 {
 			if computed, err := s.quoteFeesForDebit(ctx, req); err != nil {
-				logger.Warn("failed to quote fees", zap.Error(err))
+				logger.Warn("Failed to quote fees", zap.Error(err))
 			} else if len(computed) > 0 {
 				charges = computed
 			}
@@ -380,7 +380,7 @@ func (s *Service) postExternalDebitResponder(_ context.Context, req *ledgerv1.Po
 				if err == storage.ErrAccountNotFound {
 					return nil, merrors.NoData(fmt.Sprintf("charges[%d]: account not found", i))
 				}
-				logger.Warn("failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
+				logger.Warn("Failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
 				return nil, merrors.Internal("failed to get charge account")
 			}
 			if err := validateAccountForOrg(chargeAccount, orgRef, charge.Money.Currency); err != nil {
@@ -435,7 +435,7 @@ func (s *Service) postExternalDebitResponder(_ context.Context, req *ledgerv1.Po
 			entry.OrganizationRef = orgRef
 
 			if err := s.storage.JournalEntries().Create(txCtx, entry); err != nil {
-				logger.Warn("failed to create journal entry", zap.Error(err))
+				logger.Warn("Failed to create journal entry", zap.Error(err))
 				return nil, merrors.Internal("failed to create journal entry")
 			}
 
@@ -453,7 +453,7 @@ func (s *Service) postExternalDebitResponder(_ context.Context, req *ledgerv1.Po
 			}
 
 			if err := s.storage.PostingLines().CreateMany(txCtx, postingLines); err != nil {
-				logger.Warn("failed to create posting lines", zap.Error(err))
+				logger.Warn("Failed to create posting lines", zap.Error(err))
 				return nil, merrors.Internal("failed to create posting lines")
 			}
 

api/ledger/internal/service/ledger/posting_fx.go

@@ -77,7 +77,7 @@ func (s *Service) fxResponder(_ context.Context, req *ledgerv1.FXRequest) gsresp
 		existingEntry, err := s.storage.JournalEntries().GetByIdempotencyKey(ctx, orgRef, req.IdempotencyKey)
 		if err == nil && existingEntry != nil {
 			recordDuplicateRequest("fx")
-			logger.Info("duplicate FX request (idempotency)",
+			logger.Info("Duplicate FX request (idempotency)",
 				zap.String("existingEntryID", existingEntry.GetID().Hex()))
 			return &ledgerv1.PostResponse{
 				JournalEntryRef: existingEntry.GetID().Hex(),
@@ -86,7 +86,7 @@ func (s *Service) fxResponder(_ context.Context, req *ledgerv1.FXRequest) gsresp
 			}, nil
 		}
 		if err != nil && err != storage.ErrJournalEntryNotFound {
-			logger.Warn("failed to check idempotency", zap.Error(err))
+			logger.Warn("Failed to check idempotency", zap.Error(err))
 			return nil, merrors.Internal("failed to check idempotency")
 		}
 
@@ -96,7 +96,7 @@ func (s *Service) fxResponder(_ context.Context, req *ledgerv1.FXRequest) gsresp
 			if err == storage.ErrAccountNotFound {
 				return nil, merrors.NoData("from_account not found")
 			}
-			logger.Warn("failed to get from_account", zap.Error(err))
+			logger.Warn("Failed to get from_account", zap.Error(err))
 			return nil, merrors.Internal("failed to get from_account")
 		}
 		if err := validateAccountForOrg(fromAccount, orgRef, req.FromMoney.Currency); err != nil {
@@ -108,7 +108,7 @@ func (s *Service) fxResponder(_ context.Context, req *ledgerv1.FXRequest) gsresp
 			if err == storage.ErrAccountNotFound {
 				return nil, merrors.NoData("to_account not found")
 			}
-			logger.Warn("failed to get to_account", zap.Error(err))
+			logger.Warn("Failed to get to_account", zap.Error(err))
 			return nil, merrors.Internal("failed to get to_account")
 		}
 		if err := validateAccountForOrg(toAccount, orgRef, req.ToMoney.Currency); err != nil {
@@ -162,7 +162,7 @@ func (s *Service) fxResponder(_ context.Context, req *ledgerv1.FXRequest) gsresp
 				if err == storage.ErrAccountNotFound {
 					return nil, merrors.NoData(fmt.Sprintf("charges[%d]: account not found", i))
 				}
-				logger.Warn("failed to get FX charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
+				logger.Warn("Failed to get FX charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
 				return nil, merrors.Internal("failed to get charge account")
 			}
 			if err := validateAccountForOrg(chargeAccount, orgRef, charge.Money.Currency); err != nil {
@@ -210,7 +210,7 @@ func (s *Service) fxResponder(_ context.Context, req *ledgerv1.FXRequest) gsresp
 			entry.OrganizationRef = orgRef
 
 			if err := s.storage.JournalEntries().Create(txCtx, entry); err != nil {
-				logger.Warn("failed to create journal entry", zap.Error(err))
+				logger.Warn("Failed to create journal entry", zap.Error(err))
 				return nil, merrors.Internal("failed to create journal entry")
 			}
 
@@ -224,7 +224,7 @@ func (s *Service) fxResponder(_ context.Context, req *ledgerv1.FXRequest) gsresp
 			}
 
 			if err := s.storage.PostingLines().CreateMany(txCtx, postingLines); err != nil {
-				logger.Warn("failed to create posting lines", zap.Error(err))
+				logger.Warn("Failed to create posting lines", zap.Error(err))
 				return nil, merrors.Internal("failed to create posting lines")
 			}
 

api/ledger/internal/service/ledger/posting_support.go

@@ -139,7 +139,7 @@ func (s *Service) resolveSettlementAccount(ctx context.Context, orgRef bson.Obje
 			if errors.Is(err, storage.ErrAccountNotFound) {
 				return nil, merrors.NoData("contra account not found")
 			}
-			s.logger.Warn("failed to load override contra account", zap.Error(err), zap.String("accountRef", overrideRef.Hex()))
+			s.logger.Warn("Failed to load override contra account", zap.Error(err), zap.String("accountRef", overrideRef.Hex()))
 			return nil, merrors.Internal("failed to load contra account")
 		}
 		if err := validateAccountForOrg(account, orgRef, currency); err != nil {
@@ -153,7 +153,7 @@ func (s *Service) resolveSettlementAccount(ctx context.Context, orgRef bson.Obje
 		if errors.Is(err, storage.ErrAccountNotFound) {
 			return nil, merrors.InvalidArgument("no default settlement account configured for currency")
 		}
-		s.logger.Warn("failed to resolve default settlement account",
+		s.logger.Warn("Failed to resolve default settlement account",
 			zap.Error(err),
 			mzap.ObjRef("organization_ref", orgRef),
 			zap.String("currency", currency))
@@ -197,13 +197,13 @@ func (s *Service) upsertBalances(ctx context.Context, lines []*model.PostingLine
 	for accountRef, delta := range balanceDeltas {
 		account := accounts[accountRef]
 		if account == nil {
-			s.logger.Warn("account cache missing for balance update", mzap.AccRef(accountRef))
+			s.logger.Warn("Account cache missing for balance update", mzap.AccRef(accountRef))
 			return merrors.Internal("account cache missing for balance update")
 		}
 
 		currentBalance, err := balancesStore.Get(ctx, accountRef)
 		if err != nil && !errors.Is(err, storage.ErrBalanceNotFound) {
-			s.logger.Warn("failed to fetch account balance",
+			s.logger.Warn("Failed to fetch account balance",
 				zap.Error(err),
 				mzap.AccRef(accountRef))
 			return merrors.Internal("failed to update balance")
@@ -238,7 +238,7 @@ func (s *Service) upsertBalances(ctx context.Context, lines []*model.PostingLine
 		}
 
 		if err := balancesStore.Upsert(ctx, newBalance); err != nil {
-			s.logger.Warn("failed to upsert account balance", zap.Error(err), mzap.AccRef(accountRef))
+			s.logger.Warn("Failed to upsert account balance", zap.Error(err), mzap.AccRef(accountRef))
 			return merrors.Internal("failed to update balance")
 		}
 	}
@@ -275,21 +275,26 @@ func (s *Service) enqueueOutbox(ctx context.Context, entry *model.JournalEntry,
 
 	body, err := json.Marshal(payload)
 	if err != nil {
-		s.logger.Warn("failed to marshal ledger outbox payload", zap.Error(err))
+		s.logger.Warn("Failed to marshal ledger outbox payload", zap.Error(err))
 		return merrors.Internal("failed to marshal ledger event")
 	}
-
+	envelope, err := buildLedgerOutboxEnvelope(entryID.Hex(), body, 0, entry.OrganizationRef.Hex(), time.Now().UTC())
-	event := &model.OutboxEvent{
+	if err != nil {
-		EventID:  entryID.Hex(),
+		s.logger.Warn("Failed to build ledger outbox envelope", zap.Error(err))
-		Subject:  ledgerOutboxSubject,
+		return merrors.Internal("failed to prepare ledger event envelope")
-		Payload:  body,
-		Status:   model.OutboxStatusPending,
-		Attempts: 0,
 	}
-	event.OrganizationRef = entry.OrganizationRef
 
-	if err := s.storage.Outbox().Create(ctx, event); err != nil {
+	if err := s.startOutboxReliableProducer(); err != nil {
-		s.logger.Warn("failed to enqueue ledger outbox event", zap.Error(err))
+		s.logger.Warn("Failed to initialise outbox reliable producer", zap.Error(err))
+		return merrors.Internal("failed to initialize reliable outbox")
+	}
+	if s.outbox.producer == nil {
+		s.logger.Warn("Failed to enqueue ledger outbox event: reliable producer not configured")
+		return merrors.Internal("failed to enqueue ledger event")
+	}
+
+	if err := s.outbox.producer.SendWithOutbox(ctx, envelope); err != nil {
+		s.logger.Warn("Failed to enqueue ledger outbox event", zap.Error(err))
 		return merrors.Internal("failed to enqueue ledger event")
 	}
 

api/ledger/internal/service/ledger/posting_support_test.go

@@ -12,6 +12,7 @@ import (
 	"github.com/tech/sendico/ledger/storage"
 	"github.com/tech/sendico/ledger/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
+	me "github.com/tech/sendico/pkg/messaging/envelope"
 	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/model/account_role"
 	"go.mongodb.org/mongo-driver/v2/bson"
@@ -278,11 +279,20 @@ func TestEnqueueOutbox_CreatesEvent(t *testing.T) {
 	require.NoError(t, service.enqueueOutbox(ctx, entry, lines))
 	require.Len(t, producer.created, 1)
 	event := producer.created[0]
-	assert.Equal(t, entryID.Hex(), event.EventID)
+	assert.Equal(t, "ledger_outbox_sent", event.Subject)
-	assert.Equal(t, ledgerOutboxSubject, event.Subject)
+
+	envelope, err := me.Deserialize(event.Payload)
+	require.NoError(t, err)
+	assert.Equal(t, outboxPublisherSender, envelope.GetSender())
+	assert.Equal(t, "ledger_outbox_sent", envelope.GetSignature().ToString())
+
+	var wrapped ledgerOutboxMessage
+	require.NoError(t, json.Unmarshal(envelope.GetData(), &wrapped))
+	assert.Equal(t, entryID.Hex(), wrapped.EventID)
+	assert.Equal(t, ledgerOutboxSubject, wrapped.Subject)
 
 	var payload outboxJournalPayload
-	require.NoError(t, json.Unmarshal(event.Payload, &payload))
+	require.NoError(t, json.Unmarshal(wrapped.Payload, &payload))
 	assert.Equal(t, entryID.Hex(), payload.JournalEntryRef)
 	assert.Equal(t, "credit", payload.EntryType)
 	assert.Len(t, payload.Lines, 1)

api/ledger/internal/service/ledger/posting_transfer.go

@@ -87,7 +87,7 @@ func (s *Service) transferResponder(_ context.Context, req *ledgerv1.TransferReq
 		existingEntry, err := s.storage.JournalEntries().GetByIdempotencyKey(ctx, orgRef, req.IdempotencyKey)
 		if err == nil && existingEntry != nil {
 			recordDuplicateRequest("transfer")
-			logger.Info("duplicate transfer request (idempotency)",
+			logger.Info("Duplicate transfer request (idempotency)",
 				zap.String("existingEntryID", existingEntry.GetID().Hex()))
 			return &ledgerv1.PostResponse{
 				JournalEntryRef: existingEntry.GetID().Hex(),
@@ -96,7 +96,7 @@ func (s *Service) transferResponder(_ context.Context, req *ledgerv1.TransferReq
 			}, nil
 		}
 		if err != nil && err != storage.ErrJournalEntryNotFound {
-			logger.Warn("failed to check idempotency", zap.Error(err))
+			logger.Warn("Failed to check idempotency", zap.Error(err))
 			return nil, merrors.Internal("failed to check idempotency")
 		}
 
@@ -172,7 +172,7 @@ func (s *Service) transferResponder(_ context.Context, req *ledgerv1.TransferReq
 				if err == storage.ErrAccountNotFound {
 					return nil, merrors.NoData(fmt.Sprintf("charges[%d]: account not found", i))
 				}
-				logger.Warn("failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
+				logger.Warn("Failed to get charge account", zap.Error(err), zap.String("chargeAccountRef", chargeAccountRef.Hex()))
 				return nil, merrors.Internal("failed to get charge account")
 			}
 			if err := validateAccountForOrg(chargeAccount, orgRef, charge.Money.Currency); err != nil {
@@ -208,7 +208,7 @@ func (s *Service) transferResponder(_ context.Context, req *ledgerv1.TransferReq
 			entry.OrganizationRef = orgRef
 
 			if err := s.storage.JournalEntries().Create(txCtx, entry); err != nil {
-				logger.Warn("failed to create journal entry", zap.Error(err))
+				logger.Warn("Failed to create journal entry", zap.Error(err))
 				return nil, merrors.Internal("failed to create journal entry")
 			}
 
@@ -226,7 +226,7 @@ func (s *Service) transferResponder(_ context.Context, req *ledgerv1.TransferReq
 			}
 
 			if err := s.storage.PostingLines().CreateMany(txCtx, postingLines); err != nil {
-				logger.Warn("failed to create posting lines", zap.Error(err))
+				logger.Warn("Failed to create posting lines", zap.Error(err))
 				return nil, merrors.Internal("failed to create posting lines")
 			}
 

api/ledger/internal/service/ledger/queries.go

@@ -36,7 +36,7 @@ func (s *Service) getBalanceResponder(_ context.Context, req *ledgerv1.GetBalanc
 			if err == storage.ErrAccountNotFound {
 				return nil, merrors.NoData("account not found")
 			}
-			logger.Warn("failed to get account", zap.Error(err))
+			logger.Warn("Failed to get account", zap.Error(err))
 			return nil, merrors.Internal("failed to get account")
 		}
 
@@ -55,7 +55,7 @@ func (s *Service) getBalanceResponder(_ context.Context, req *ledgerv1.GetBalanc
 					LastUpdated: timestamppb.Now(),
 				}, nil
 			}
-			logger.Warn("failed to get balance", zap.Error(err))
+			logger.Warn("Failed to get balance", zap.Error(err))
 			return nil, merrors.Internal("failed to get balance")
 		}
 
@@ -92,14 +92,14 @@ func (s *Service) getJournalEntryResponder(_ context.Context, req *ledgerv1.GetE
 			if err == storage.ErrJournalEntryNotFound {
 				return nil, merrors.NoData("journal entry not found")
 			}
-			logger.Warn("failed to get journal entry", zap.Error(err))
+			logger.Warn("Failed to get journal entry", zap.Error(err))
 			return nil, merrors.Internal("failed to get journal entry")
 		}
 
 		// Get posting lines for this entry
 		lines, err := s.storage.PostingLines().ListByJournalEntry(ctx, entryRef)
 		if err != nil {
-			logger.Warn("failed to get posting lines", zap.Error(err))
+			logger.Warn("Failed to get posting lines", zap.Error(err))
 			return nil, merrors.Internal("failed to get posting lines")
 		}
 
@@ -151,7 +151,7 @@ func (s *Service) getStatementResponder(_ context.Context, req *ledgerv1.GetStat
 			if err == storage.ErrAccountNotFound {
 				return nil, merrors.NoData("account not found")
 			}
-			logger.Warn("failed to get account", zap.Error(err))
+			logger.Warn("Failed to get account", zap.Error(err))
 			return nil, merrors.Internal("failed to get account")
 		}
 
@@ -176,7 +176,7 @@ func (s *Service) getStatementResponder(_ context.Context, req *ledgerv1.GetStat
 		// Get posting lines for account
 		postingLines, err := s.storage.PostingLines().ListByAccount(ctx, accountRef, limit+1, offset)
 		if err != nil {
-			logger.Warn("failed to get posting lines", zap.Error(err))
+			logger.Warn("Failed to get posting lines", zap.Error(err))
 			return nil, merrors.Internal("failed to get posting lines")
 		}
 
@@ -196,20 +196,20 @@ func (s *Service) getStatementResponder(_ context.Context, req *ledgerv1.GetStat
 		for entryRefHex := range entryMap {
 			entryRef, err := parseObjectID(entryRefHex)
 			if err != nil {
-				s.logger.Warn("invalid journal entry ref in posting lines", zap.String("entry_ref", entryRefHex), zap.Error(err))
+				s.logger.Warn("Invalid journal entry ref in posting lines", zap.String("entry_ref", entryRefHex), zap.Error(err))
 				return nil, err
 			}
 
 			entry, err := s.storage.JournalEntries().Get(ctx, entryRef)
 			if err != nil {
-				logger.Warn("failed to get journal entry for statement", zap.Error(err), zap.String("entry_ref", entryRefHex))
+				logger.Warn("Failed to get journal entry for statement", zap.Error(err), zap.String("entry_ref", entryRefHex))
 				continue
 			}
 
 			// Get all lines for this entry
 			lines, err := s.storage.PostingLines().ListByJournalEntry(ctx, entryRef)
 			if err != nil {
-				logger.Warn("failed to get posting lines for entry", zap.Error(err), zap.String("entry_ref", entryRefHex))
+				logger.Warn("Failed to get posting lines for entry", zap.Error(err), zap.String("entry_ref", entryRefHex))
 				continue
 			}
 

api/ledger/internal/service/ledger/service.go

@@ -23,6 +23,7 @@ import (
 	"github.com/tech/sendico/pkg/discovery"
 	"github.com/tech/sendico/pkg/merrors"
 	pmessaging "github.com/tech/sendico/pkg/messaging"
+	pmessagingreliable "github.com/tech/sendico/pkg/messaging/reliable"
 	"github.com/tech/sendico/pkg/mlogger"
 	pmodel "github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
@@ -44,14 +45,15 @@ type Service struct {
 	logger    mlogger.Logger
 	storage   storage.Repository
 	producer  pmessaging.Producer
+	msgCfg    pmodel.SettingsT
 	fees      feesDependency
 	announcer *discovery.Announcer
 	invokeURI string
 
 	outbox struct {
-		once      sync.Once
+		once     sync.Once
-		cancel    context.CancelFunc
+		cancel   context.CancelFunc
-		publisher *outboxPublisher
+		producer *pmessagingreliable.ReliableProducer
 	}
 
 	systemAccounts struct {
@@ -70,7 +72,7 @@ func (f feesDependency) available() bool {
 	return f.client != nil
 }
 
-func NewService(logger mlogger.Logger, repo storage.Repository, prod pmessaging.Producer, feesClient feesv1.FeeEngineClient, feesTimeout time.Duration, invokeURI string) *Service {
+func NewService(logger mlogger.Logger, repo storage.Repository, prod pmessaging.Producer, msgCfg pmodel.SettingsT, feesClient feesv1.FeeEngineClient, feesTimeout time.Duration, invokeURI string) (*Service, error) {
 	// Initialize Prometheus metrics
 	initMetrics()
 
@@ -78,6 +80,7 @@ func NewService(logger mlogger.Logger, repo storage.Repository, prod pmessaging.
 		logger:    logger.Named("ledger"),
 		storage:   repo,
 		producer:  prod,
+		msgCfg:    msgCfg,
 		invokeURI: strings.TrimSpace(invokeURI),
 		fees: feesDependency{
 			client:  feesClient,
@@ -85,9 +88,11 @@ func NewService(logger mlogger.Logger, repo storage.Repository, prod pmessaging.
 		},
 	}
 
-	service.startOutboxPublisher()
+	if err := service.startOutboxReliableProducer(); err != nil {
+		return nil, err
+	}
 	service.startDiscoveryAnnouncer()
-	return service
+	return service, nil
 }
 
 func (s *Service) Register(router routers.GRPC) error {
@@ -405,23 +410,39 @@ func (s *Service) startDiscoveryAnnouncer() {
 	s.announcer.Start()
 }
 
-func (s *Service) startOutboxPublisher() {
+func (s *Service) startOutboxReliableProducer() error {
-	if s.storage == nil || s.producer == nil {
+	if s.storage == nil {
-		return
+		return nil
 	}
 
+	var initErr error
 	s.outbox.once.Do(func() {
 		outboxStore := s.storage.Outbox()
 		if outboxStore == nil {
 			return
 		}
+		reliableProducer, settings, err := newLedgerReliableProducer(s.logger, s.producer, outboxStore, s.msgCfg)
+		if err != nil {
+			initErr = err
+			return
+		}
+		s.outbox.producer = reliableProducer
+		if s.outbox.producer == nil || s.producer == nil {
+			s.logger.Info("Outbox reliable publisher disabled",
+				zap.Bool("enabled", settings.Enabled))
+			return
+		}
+		s.logger.Info("Outbox reliable publisher configured",
+			zap.Bool("enabled", settings.Enabled),
+			zap.Int("batch_size", settings.BatchSize),
+			zap.Int("poll_interval_seconds", settings.PollIntervalSeconds),
+			zap.Int("max_attempts", settings.MaxAttempts))
 
 		ctx, cancel := context.WithCancel(context.Background())
 		s.outbox.cancel = cancel
-		s.outbox.publisher = newOutboxPublisher(s.logger, outboxStore, s.producer)
+		go s.outbox.producer.Run(ctx)
-
-		go s.outbox.publisher.run(ctx)
 	})
+	return initErr
 }
 
 // BlockAccount freezes a ledger account

api/ledger/storage/mongo/store/balances.go

@@ -32,12 +32,12 @@ func NewBalances(logger mlogger.Logger, db *mongo.Database) (storage.BalancesSto
 		Unique: true,
 	}
 	if err := repo.CreateIndex(uniqueIndex); err != nil {
-		logger.Error("failed to ensure balances unique index", zap.Error(err))
+		logger.Error("Failed to ensure balances unique index", zap.Error(err))
 		return nil, err
 	}
 
 	childLogger := logger.Named(model.AccountBalancesCollection)
-	childLogger.Debug("balances store initialised", zap.String("collection", model.AccountBalancesCollection))
+	childLogger.Debug("Balances store initialised", zap.String("collection", model.AccountBalancesCollection))
 
 	return &balancesStore{
 		logger: childLogger,
@@ -47,7 +47,7 @@ func NewBalances(logger mlogger.Logger, db *mongo.Database) (storage.BalancesSto
 
 func (b *balancesStore) Get(ctx context.Context, accountRef bson.ObjectID) (*model.AccountBalance, error) {
 	if accountRef.IsZero() {
-		b.logger.Warn("attempt to get balance with zero account ID")
+		b.logger.Warn("Attempt to get balance with zero account ID")
 		return nil, merrors.InvalidArgument("balancesStore: zero account ID")
 	}
 
@@ -56,25 +56,25 @@ func (b *balancesStore) Get(ctx context.Context, accountRef bson.ObjectID) (*mod
 	result := &model.AccountBalance{}
 	if err := b.repo.FindOneByFilter(ctx, query, result); err != nil {
 		if errors.Is(err, merrors.ErrNoData) {
-			b.logger.Debug("balance not found", mzap.AccRef(accountRef))
+			b.logger.Debug("Balance not found", mzap.AccRef(accountRef))
 			return nil, storage.ErrBalanceNotFound
 		}
-		b.logger.Warn("failed to get balance", zap.Error(err), mzap.AccRef(accountRef))
+		b.logger.Warn("Failed to get balance", zap.Error(err), mzap.AccRef(accountRef))
 		return nil, err
 	}
 
-	b.logger.Debug("balance loaded", mzap.AccRef(accountRef),
+	b.logger.Debug("Balance loaded", mzap.AccRef(accountRef),
 		zap.String("balance", result.Balance))
 	return result, nil
 }
 
 func (b *balancesStore) Upsert(ctx context.Context, balance *model.AccountBalance) error {
 	if balance == nil {
-		b.logger.Warn("attempt to upsert nil balance")
+		b.logger.Warn("Attempt to upsert nil balance")
 		return merrors.InvalidArgument("balancesStore: nil balance")
 	}
 	if balance.AccountRef.IsZero() {
-		b.logger.Warn("attempt to upsert balance with zero account ID")
+		b.logger.Warn("Attempt to upsert balance with zero account ID")
 		return merrors.InvalidArgument("balancesStore: zero account ID")
 	}
 
@@ -83,24 +83,24 @@ func (b *balancesStore) Upsert(ctx context.Context, balance *model.AccountBalanc
 
 	if err := b.repo.FindOneByFilter(ctx, filter, existing); err != nil {
 		if errors.Is(err, merrors.ErrNoData) {
-			b.logger.Debug("inserting new balance", zap.String("accountRef", balance.AccountRef.Hex()))
+			b.logger.Debug("Inserting new balance", zap.String("accountRef", balance.AccountRef.Hex()))
 			return b.repo.Insert(ctx, balance, filter)
 		}
-		b.logger.Warn("failed to fetch balance", zap.Error(err), zap.String("accountRef", balance.AccountRef.Hex()))
+		b.logger.Warn("Failed to fetch balance", zap.Error(err), zap.String("accountRef", balance.AccountRef.Hex()))
 		return err
 	}
 
 	if existing.GetID() != nil {
 		balance.SetID(*existing.GetID())
 	}
-	b.logger.Debug("updating balance", zap.String("accountRef", balance.AccountRef.Hex()),
+	b.logger.Debug("Updating balance", zap.String("accountRef", balance.AccountRef.Hex()),
 		zap.String("balance", balance.Balance))
 	return b.repo.Update(ctx, balance)
 }
 
 func (b *balancesStore) IncrementBalance(ctx context.Context, accountRef bson.ObjectID, amount string) error {
 	if accountRef.IsZero() {
-		b.logger.Warn("attempt to increment balance with zero account ID")
+		b.logger.Warn("Attempt to increment balance with zero account ID")
 		return merrors.InvalidArgument("balancesStore: zero account ID")
 	}
 

api/ledger/storage/mongo/store/journal_entries.go

@@ -33,7 +33,7 @@ func NewJournalEntries(logger mlogger.Logger, db *mongo.Database) (storage.Journ
 		Unique: true,
 	}
 	if err := repo.CreateIndex(uniqueIndex); err != nil {
-		logger.Error("failed to ensure journal entries idempotency index", zap.Error(err))
+		logger.Error("Failed to ensure journal entries idempotency index", zap.Error(err))
 		return nil, err
 	}
 
@@ -45,12 +45,12 @@ func NewJournalEntries(logger mlogger.Logger, db *mongo.Database) (storage.Journ
 		},
 	}
 	if err := repo.CreateIndex(orgIndex); err != nil {
-		logger.Error("failed to ensure journal entries organization index", zap.Error(err))
+		logger.Error("Failed to ensure journal entries organization index", zap.Error(err))
 		return nil, err
 	}
 
 	childLogger := logger.Named(model.JournalEntriesCollection)
-	childLogger.Debug("journal entries store initialised", zap.String("collection", model.JournalEntriesCollection))
+	childLogger.Debug("Journal entries store initialised", zap.String("collection", model.JournalEntriesCollection))
 
 	return &journalEntriesStore{
 		logger: childLogger,
@@ -60,52 +60,52 @@ func NewJournalEntries(logger mlogger.Logger, db *mongo.Database) (storage.Journ
 
 func (j *journalEntriesStore) Create(ctx context.Context, entry *model.JournalEntry) error {
 	if entry == nil {
-		j.logger.Warn("attempt to create nil journal entry")
+		j.logger.Warn("Attempt to create nil journal entry")
 		return merrors.InvalidArgument("journalEntriesStore: nil journal entry")
 	}
 
 	if err := j.repo.Insert(ctx, entry, nil); err != nil {
 		if mongo.IsDuplicateKeyError(err) {
-			j.logger.Warn("duplicate idempotency key", zap.String("idempotency_key", entry.IdempotencyKey))
+			j.logger.Warn("Duplicate idempotency key", zap.String("idempotency_key", entry.IdempotencyKey))
 			return storage.ErrDuplicateIdempotency
 		}
-		j.logger.Warn("failed to create journal entry", zap.Error(err))
+		j.logger.Warn("Failed to create journal entry", zap.Error(err))
 		return err
 	}
 
-	j.logger.Debug("journal entry created", zap.String("idempotency_key", entry.IdempotencyKey),
+	j.logger.Debug("Journal entry created", zap.String("idempotency_key", entry.IdempotencyKey),
 		zap.String("entryType", string(entry.EntryType)))
 	return nil
 }
 
 func (j *journalEntriesStore) Get(ctx context.Context, entryRef bson.ObjectID) (*model.JournalEntry, error) {
 	if entryRef.IsZero() {
-		j.logger.Warn("attempt to get journal entry with zero ID")
+		j.logger.Warn("Attempt to get journal entry with zero ID")
 		return nil, merrors.InvalidArgument("journalEntriesStore: zero entry ID")
 	}
 
 	result := &model.JournalEntry{}
 	if err := j.repo.Get(ctx, entryRef, result); err != nil {
 		if errors.Is(err, merrors.ErrNoData) {
-			j.logger.Debug("journal entry not found", mzap.ObjRef("entry_ref", entryRef))
+			j.logger.Debug("Journal entry not found", mzap.ObjRef("entry_ref", entryRef))
 			return nil, storage.ErrJournalEntryNotFound
 		}
-		j.logger.Warn("failed to get journal entry", zap.Error(err), mzap.ObjRef("entry_ref", entryRef))
+		j.logger.Warn("Failed to get journal entry", zap.Error(err), mzap.ObjRef("entry_ref", entryRef))
 		return nil, err
 	}
 
-	j.logger.Debug("journal entry loaded", mzap.ObjRef("entry_ref", entryRef),
+	j.logger.Debug("Journal entry loaded", mzap.ObjRef("entry_ref", entryRef),
 		zap.String("idempotency_key", result.IdempotencyKey))
 	return result, nil
 }
 
 func (j *journalEntriesStore) GetByIdempotencyKey(ctx context.Context, orgRef bson.ObjectID, idempotencyKey string) (*model.JournalEntry, error) {
 	if orgRef.IsZero() {
-		j.logger.Warn("attempt to get journal entry with zero organization ID")
+		j.logger.Warn("Attempt to get journal entry with zero organization ID")
 		return nil, merrors.InvalidArgument("journalEntriesStore: zero organization ID")
 	}
 	if idempotencyKey == "" {
-		j.logger.Warn("attempt to get journal entry with empty idempotency key")
+		j.logger.Warn("Attempt to get journal entry with empty idempotency key")
 		return nil, merrors.InvalidArgument("journalEntriesStore: empty idempotency key")
 	}
 
@@ -116,21 +116,21 @@ func (j *journalEntriesStore) GetByIdempotencyKey(ctx context.Context, orgRef bs
 	result := &model.JournalEntry{}
 	if err := j.repo.FindOneByFilter(ctx, query, result); err != nil {
 		if errors.Is(err, merrors.ErrNoData) {
-			j.logger.Debug("journal entry not found by idempotency key", zap.String("idempotency_key", idempotencyKey))
+			j.logger.Debug("Journal entry not found by idempotency key", zap.String("idempotency_key", idempotencyKey))
 			return nil, storage.ErrJournalEntryNotFound
 		}
-		j.logger.Warn("failed to get journal entry by idempotency key", zap.Error(err),
+		j.logger.Warn("Failed to get journal entry by idempotency key", zap.Error(err),
 			zap.String("idempotency_key", idempotencyKey))
 		return nil, err
 	}
 
-	j.logger.Debug("journal entry loaded by idempotency key", zap.String("idempotency_key", idempotencyKey))
+	j.logger.Debug("Journal entry loaded by idempotency key", zap.String("idempotency_key", idempotencyKey))
 	return result, nil
 }
 
 func (j *journalEntriesStore) ListByOrganization(ctx context.Context, orgRef bson.ObjectID, limit int, offset int) ([]*model.JournalEntry, error) {
 	if orgRef.IsZero() {
-		j.logger.Warn("attempt to list journal entries with zero organization ID")
+		j.logger.Warn("Attempt to list journal entries with zero organization ID")
 		return nil, merrors.InvalidArgument("journalEntriesStore: zero organization ID")
 	}
 
@@ -152,10 +152,10 @@ func (j *journalEntriesStore) ListByOrganization(ctx context.Context, orgRef bso
 		return nil
 	})
 	if err != nil {
-		j.logger.Warn("failed to list journal entries", zap.Error(err))
+		j.logger.Warn("Failed to list journal entries", zap.Error(err))
 		return nil, err
 	}
 
-	j.logger.Debug("listed journal entries", zap.Int("count", len(entries)))
+	j.logger.Debug("Listed journal entries", zap.Int("count", len(entries)))
 	return entries, nil
 }

api/ledger/storage/mongo/store/outbox.go

@@ -31,7 +31,7 @@ func NewOutbox(logger mlogger.Logger, db *mongo.Database) (storage.OutboxStore,
 		},
 	}
 	if err := repo.CreateIndex(statusIndex); err != nil {
-		logger.Error("failed to ensure outbox status index", zap.Error(err))
+		logger.Error("Failed to ensure outbox status index", zap.Error(err))
 		return nil, err
 	}
 
@@ -43,12 +43,12 @@ func NewOutbox(logger mlogger.Logger, db *mongo.Database) (storage.OutboxStore,
 		Unique: true,
 	}
 	if err := repo.CreateIndex(eventIdIndex); err != nil {
-		logger.Error("failed to ensure outbox eventId index", zap.Error(err))
+		logger.Error("Failed to ensure outbox eventId index", zap.Error(err))
 		return nil, err
 	}
 
 	childLogger := logger.Named(model.OutboxCollection)
-	childLogger.Debug("outbox store initialised", zap.String("collection", model.OutboxCollection))
+	childLogger.Debug("Outbox store initialised", zap.String("collection", model.OutboxCollection))
 
 	return &outboxStore{
 		logger: childLogger,
@@ -58,20 +58,20 @@ func NewOutbox(logger mlogger.Logger, db *mongo.Database) (storage.OutboxStore,
 
 func (o *outboxStore) Create(ctx context.Context, event *model.OutboxEvent) error {
 	if event == nil {
-		o.logger.Warn("attempt to create nil outbox event")
+		o.logger.Warn("Attempt to create nil outbox event")
 		return merrors.InvalidArgument("outboxStore: nil outbox event")
 	}
 
 	if err := o.repo.Insert(ctx, event, nil); err != nil {
 		if mongo.IsDuplicateKeyError(err) {
-			o.logger.Warn("duplicate event ID", zap.String("eventId", event.EventID))
+			o.logger.Warn("Duplicate event ID", zap.String("eventId", event.EventID))
 			return merrors.DataConflict("outbox event with this ID already exists")
 		}
-		o.logger.Warn("failed to create outbox event", zap.Error(err))
+		o.logger.Warn("Failed to create outbox event", zap.Error(err))
 		return err
 	}
 
-	o.logger.Debug("outbox event created", zap.String("eventId", event.EventID),
+	o.logger.Debug("Outbox event created", zap.String("eventId", event.EventID),
 		zap.String("subject", event.Subject))
 	return nil
 }
@@ -93,17 +93,17 @@ func (o *outboxStore) ListPending(ctx context.Context, limit int) ([]*model.Outb
 		return nil
 	})
 	if err != nil {
-		o.logger.Warn("failed to list pending outbox events", zap.Error(err))
+		o.logger.Warn("Failed to list pending outbox events", zap.Error(err))
 		return nil, err
 	}
 
-	o.logger.Debug("listed pending outbox events", zap.Int("count", len(events)))
+	o.logger.Debug("Listed pending outbox events", zap.Int("count", len(events)))
 	return events, nil
 }
 
 func (o *outboxStore) MarkSent(ctx context.Context, eventRef bson.ObjectID, sentAt time.Time) error {
 	if eventRef.IsZero() {
-		o.logger.Warn("attempt to mark sent with zero event ID")
+		o.logger.Warn("Attempt to mark sent with zero event ID")
 		return merrors.InvalidArgument("outboxStore: zero event ID")
 	}
 
@@ -112,44 +112,44 @@ func (o *outboxStore) MarkSent(ctx context.Context, eventRef bson.ObjectID, sent
 		Set(repository.Field("sentAt"), sentAt)
 
 	if err := o.repo.Patch(ctx, eventRef, patch); err != nil {
-		o.logger.Warn("failed to mark outbox event as sent", zap.Error(err), zap.String("eventRef", eventRef.Hex()))
+		o.logger.Warn("Failed to mark outbox event as sent", zap.Error(err), zap.String("eventRef", eventRef.Hex()))
 		return err
 	}
 
-	o.logger.Debug("outbox event marked as sent", zap.String("eventRef", eventRef.Hex()))
+	o.logger.Debug("Outbox event marked as sent", zap.String("eventRef", eventRef.Hex()))
 	return nil
 }
 
 func (o *outboxStore) MarkFailed(ctx context.Context, eventRef bson.ObjectID) error {
 	if eventRef.IsZero() {
-		o.logger.Warn("attempt to mark failed with zero event ID")
+		o.logger.Warn("Attempt to mark failed with zero event ID")
 		return merrors.InvalidArgument("outboxStore: zero event ID")
 	}
 
 	patch := repository.Patch().Set(repository.Field("status"), model.OutboxStatusFailed)
 
 	if err := o.repo.Patch(ctx, eventRef, patch); err != nil {
-		o.logger.Warn("failed to mark outbox event as failed", zap.Error(err), zap.String("eventRef", eventRef.Hex()))
+		o.logger.Warn("Failed to mark outbox event as failed", zap.Error(err), zap.String("eventRef", eventRef.Hex()))
 		return err
 	}
 
-	o.logger.Debug("outbox event marked as failed", zap.String("eventRef", eventRef.Hex()))
+	o.logger.Debug("Outbox event marked as failed", zap.String("eventRef", eventRef.Hex()))
 	return nil
 }
 
 func (o *outboxStore) IncrementAttempts(ctx context.Context, eventRef bson.ObjectID) error {
 	if eventRef.IsZero() {
-		o.logger.Warn("attempt to increment attempts with zero event ID")
+		o.logger.Warn("Attempt to increment attempts with zero event ID")
 		return merrors.InvalidArgument("outboxStore: zero event ID")
 	}
 
 	patch := repository.Patch().Inc(repository.Field("attempts"), 1)
 
 	if err := o.repo.Patch(ctx, eventRef, patch); err != nil {
-		o.logger.Warn("failed to increment outbox attempts", zap.Error(err), zap.String("eventRef", eventRef.Hex()))
+		o.logger.Warn("Failed to increment outbox attempts", zap.Error(err), zap.String("eventRef", eventRef.Hex()))
 		return err
 	}
 
-	o.logger.Debug("outbox attempts incremented", zap.String("eventRef", eventRef.Hex()))
+	o.logger.Debug("Outbox attempts incremented", zap.String("eventRef", eventRef.Hex()))
 	return nil
 }

api/ledger/storage/mongo/store/posting_lines.go

@@ -31,7 +31,7 @@ func NewPostingLines(logger mlogger.Logger, db *mongo.Database) (storage.Posting
 		},
 	}
 	if err := repo.CreateIndex(entryIndex); err != nil {
-		logger.Error("failed to ensure posting lines entry index", zap.Error(err))
+		logger.Error("Failed to ensure posting lines entry index", zap.Error(err))
 		return nil, err
 	}
 
@@ -43,12 +43,12 @@ func NewPostingLines(logger mlogger.Logger, db *mongo.Database) (storage.Posting
 		},
 	}
 	if err := repo.CreateIndex(accountIndex); err != nil {
-		logger.Error("failed to ensure posting lines account index", zap.Error(err))
+		logger.Error("Failed to ensure posting lines account index", zap.Error(err))
 		return nil, err
 	}
 
 	childLogger := logger.Named(model.PostingLinesCollection)
-	childLogger.Debug("posting lines store initialised", zap.String("collection", model.PostingLinesCollection))
+	childLogger.Debug("Posting lines store initialised", zap.String("collection", model.PostingLinesCollection))
 
 	return &postingLinesStore{
 		logger: childLogger,
@@ -58,31 +58,31 @@ func NewPostingLines(logger mlogger.Logger, db *mongo.Database) (storage.Posting
 
 func (p *postingLinesStore) CreateMany(ctx context.Context, lines []*model.PostingLine) error {
 	if len(lines) == 0 {
-		p.logger.Warn("attempt to create empty posting lines array")
+		p.logger.Warn("Attempt to create empty posting lines array")
 		return nil
 	}
 
 	storables := make([]storable.Storable, len(lines))
 	for i, line := range lines {
 		if line == nil {
-			p.logger.Warn("attempt to create nil posting line")
+			p.logger.Warn("Attempt to create nil posting line")
 			return merrors.InvalidArgument("postingLinesStore: nil posting line")
 		}
 		storables[i] = line
 	}
 
 	if err := p.repo.InsertMany(ctx, storables); err != nil {
-		p.logger.Warn("failed to create posting lines", zap.Error(err), zap.Int("count", len(lines)))
+		p.logger.Warn("Failed to create posting lines", zap.Error(err), zap.Int("count", len(lines)))
 		return err
 	}
 
-	p.logger.Debug("posting lines created", zap.Int("count", len(lines)))
+	p.logger.Debug("Posting lines created", zap.Int("count", len(lines)))
 	return nil
 }
 
 func (p *postingLinesStore) ListByJournalEntry(ctx context.Context, entryRef bson.ObjectID) ([]*model.PostingLine, error) {
 	if entryRef.IsZero() {
-		p.logger.Warn("attempt to list posting lines with zero entry ID")
+		p.logger.Warn("Attempt to list posting lines with zero entry ID")
 		return nil, merrors.InvalidArgument("postingLinesStore: zero entry ID")
 	}
 
@@ -98,17 +98,17 @@ func (p *postingLinesStore) ListByJournalEntry(ctx context.Context, entryRef bso
 		return nil
 	})
 	if err != nil {
-		p.logger.Warn("failed to list posting lines by entry", zap.Error(err), mzap.ObjRef("entry_ref", entryRef))
+		p.logger.Warn("Failed to list posting lines by entry", zap.Error(err), mzap.ObjRef("entry_ref", entryRef))
 		return nil, err
 	}
 
-	p.logger.Debug("listed posting lines by entry", zap.Int("count", len(lines)), mzap.ObjRef("entry_ref", entryRef))
+	p.logger.Debug("Listed posting lines by entry", zap.Int("count", len(lines)), mzap.ObjRef("entry_ref", entryRef))
 	return lines, nil
 }
 
 func (p *postingLinesStore) ListByAccount(ctx context.Context, accountRef bson.ObjectID, limit int, offset int) ([]*model.PostingLine, error) {
 	if accountRef.IsZero() {
-		p.logger.Warn("attempt to list posting lines with zero account ID")
+		p.logger.Warn("Attempt to list posting lines with zero account ID")
 		return nil, merrors.InvalidArgument("postingLinesStore: zero account ID")
 	}
 
@@ -130,10 +130,10 @@ func (p *postingLinesStore) ListByAccount(ctx context.Context, accountRef bson.O
 		return nil
 	})
 	if err != nil {
-		p.logger.Warn("failed to list posting lines by account", zap.Error(err), mzap.AccRef(accountRef))
+		p.logger.Warn("Failed to list posting lines by account", zap.Error(err), mzap.AccRef(accountRef))
 		return nil, err
 	}
 
-	p.logger.Debug("listed posting lines by account", zap.Int("count", len(lines)), mzap.AccRef(accountRef))
+	p.logger.Debug("Listed posting lines by account", zap.Int("count", len(lines)), mzap.AccRef(accountRef))
 	return lines, nil
 }

api/notification/go.mod

@@ -50,7 +50,7 @@ require (
 	golang.org/x/net v0.50.0 // indirect
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 	google.golang.org/grpc v1.79.1 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 )

api/notification/go.sum

@@ -225,8 +225,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

api/payments/methods/client/client.go

@@ -18,6 +18,7 @@ import (
 type Client interface {
 	CreatePaymentMethod(ctx context.Context, req *methodsv1.CreatePaymentMethodRequest) (*methodsv1.CreatePaymentMethodResponse, error)
 	GetPaymentMethod(ctx context.Context, req *methodsv1.GetPaymentMethodRequest) (*methodsv1.GetPaymentMethodResponse, error)
+	GetPaymentMethodPrivate(ctx context.Context, req *methodsv1.GetPaymentMethodPrivateRequest) (*methodsv1.GetPaymentMethodPrivateResponse, error)
 	UpdatePaymentMethod(ctx context.Context, req *methodsv1.UpdatePaymentMethodRequest) (*methodsv1.UpdatePaymentMethodResponse, error)
 	DeletePaymentMethod(ctx context.Context, req *methodsv1.DeletePaymentMethodRequest) (*methodsv1.DeletePaymentMethodResponse, error)
 	SetPaymentMethodArchived(ctx context.Context, req *methodsv1.SetPaymentMethodArchivedRequest) (*methodsv1.SetPaymentMethodArchivedResponse, error)
@@ -28,6 +29,7 @@ type Client interface {
 type grpcPaymentMethodsClient interface {
 	CreatePaymentMethod(ctx context.Context, in *methodsv1.CreatePaymentMethodRequest, opts ...grpc.CallOption) (*methodsv1.CreatePaymentMethodResponse, error)
 	GetPaymentMethod(ctx context.Context, in *methodsv1.GetPaymentMethodRequest, opts ...grpc.CallOption) (*methodsv1.GetPaymentMethodResponse, error)
+	GetPaymentMethodPrivate(ctx context.Context, in *methodsv1.GetPaymentMethodPrivateRequest, opts ...grpc.CallOption) (*methodsv1.GetPaymentMethodPrivateResponse, error)
 	UpdatePaymentMethod(ctx context.Context, in *methodsv1.UpdatePaymentMethodRequest, opts ...grpc.CallOption) (*methodsv1.UpdatePaymentMethodResponse, error)
 	DeletePaymentMethod(ctx context.Context, in *methodsv1.DeletePaymentMethodRequest, opts ...grpc.CallOption) (*methodsv1.DeletePaymentMethodResponse, error)
 	SetPaymentMethodArchived(ctx context.Context, in *methodsv1.SetPaymentMethodArchivedRequest, opts ...grpc.CallOption) (*methodsv1.SetPaymentMethodArchivedResponse, error)
@@ -106,6 +108,12 @@ func (c *paymentMethodsClient) GetPaymentMethod(ctx context.Context, req *method
 	return c.client.GetPaymentMethod(callCtx, req)
 }
 
+func (c *paymentMethodsClient) GetPaymentMethodPrivate(ctx context.Context, req *methodsv1.GetPaymentMethodPrivateRequest) (*methodsv1.GetPaymentMethodPrivateResponse, error) {
+	callCtx, cancel := c.callContext(ctx)
+	defer cancel()
+	return c.client.GetPaymentMethodPrivate(callCtx, req)
+}
+
 func (c *paymentMethodsClient) UpdatePaymentMethod(ctx context.Context, req *methodsv1.UpdatePaymentMethodRequest) (*methodsv1.UpdatePaymentMethodResponse, error) {
 	callCtx, cancel := c.callContext(ctx)
 	defer cancel()

api/payments/methods/go.mod

@@ -48,5 +48,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 )

api/payments/methods/go.sum

@@ -208,8 +208,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

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

@@ -51,7 +51,7 @@ func (i *Imp) Start() error {
 
 	permissionsDB := cfg.PermissionsDatabase
 	if permissionsDB == nil {
-		i.logger.Info("permissions_database is not configured, falling back to database settings")
+		i.logger.Info("Permissions_database is not configured, falling back to database settings")
 		permissionsDB = cfg.Database
 	}
 

api/payments/methods/internal/service/methods/get_private.go

@@ -0,0 +1,168 @@
+package methods
+
+import (
+	"context"
+
+	"github.com/tech/sendico/pkg/merrors"
+	pkgmodel "github.com/tech/sendico/pkg/model"
+	methodsv1 "github.com/tech/sendico/pkg/proto/payments/methods/v1"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+const (
+	paymentTypeAccount              pkgmodel.PaymentType = 8
+	maxPrivateMethodResolutionDepth                      = 8
+)
+
+func (s *Service) GetPaymentMethodPrivate(ctx context.Context, req *methodsv1.GetPaymentMethodPrivateRequest) (*methodsv1.GetPaymentMethodPrivateResponse, error) {
+	if req == nil {
+		return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, merrors.InvalidArgument("request is required"))
+	}
+	if s.pmstore == nil {
+		return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, errStoreUnavailable)
+	}
+
+	if req.GetEndpoint() == methodsv1.PrivateEndpoint_PRIVATE_ENDPOINT_UNSPECIFIED {
+		return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, merrors.InvalidArgument("endpoint is required", "endpoint"))
+	}
+
+	organizationRef, err := parseObjectID(req.GetOrganizationRef(), "organization_ref")
+	if err != nil {
+		return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, err)
+	}
+
+	var resolved *pkgmodel.PaymentMethod
+	switch req.GetSelector().(type) {
+	case *methodsv1.GetPaymentMethodPrivateRequest_PaymentMethodRef:
+		methodRef, err := parseObjectID(req.GetPaymentMethodRef(), "payment_method_ref")
+		if err != nil {
+			return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, err)
+		}
+		resolved, err = s.resolvePrivateByMethodRef(ctx, organizationRef, methodRef, req.GetEndpoint(), 0)
+		if err != nil {
+			return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, err)
+		}
+	case *methodsv1.GetPaymentMethodPrivateRequest_PayeeRef:
+		payeeRef, err := parseObjectID(req.GetPayeeRef(), "payee_ref")
+		if err != nil {
+			return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, err)
+		}
+		resolved, err = s.resolvePrivateByRecipientRef(ctx, organizationRef, payeeRef, req.GetEndpoint(), 0)
+		if err != nil {
+			return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, err)
+		}
+	default:
+		return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, merrors.InvalidArgument(
+			"selector must include payment_method_ref or payee_ref",
+			"selector",
+		))
+	}
+
+	record, err := encodePaymentMethodRecord(resolved)
+	if err != nil {
+		return autoError[methodsv1.GetPaymentMethodPrivateResponse](ctx, s.logger, err)
+	}
+
+	return &methodsv1.GetPaymentMethodPrivateResponse{
+		PaymentMethodRecord: record,
+	}, nil
+}
+
+func (s *Service) resolvePrivateByMethodRef(
+	ctx context.Context,
+	organizationRef bson.ObjectID,
+	methodRef bson.ObjectID,
+	endpoint methodsv1.PrivateEndpoint,
+	depth int,
+) (*pkgmodel.PaymentMethod, error) {
+	method, err := s.pmstore.GetPrivate(ctx, methodRef)
+	if err != nil {
+		return nil, err
+	}
+	return s.resolvePrivateMethod(ctx, organizationRef, method, endpoint, depth)
+}
+
+func (s *Service) resolvePrivateByRecipientRef(
+	ctx context.Context,
+	organizationRef bson.ObjectID,
+	recipientRef bson.ObjectID,
+	endpoint methodsv1.PrivateEndpoint,
+	depth int,
+) (*pkgmodel.PaymentMethod, error) {
+	items, err := s.pmstore.ListPrivate(ctx, organizationRef, recipientRef, nil)
+	if err != nil {
+		return nil, err
+	}
+	if len(items) == 0 {
+		return nil, merrors.InvalidArgument("no payment methods available for recipient")
+	}
+
+	selected := pickPreferredPrivateMethod(items, endpoint)
+	if selected == nil {
+		return nil, merrors.InvalidArgument("no routable payment methods available for recipient")
+	}
+	return s.resolvePrivateMethod(ctx, organizationRef, selected, endpoint, depth)
+}
+
+func (s *Service) resolvePrivateMethod(
+	ctx context.Context,
+	organizationRef bson.ObjectID,
+	method *pkgmodel.PaymentMethod,
+	endpoint methodsv1.PrivateEndpoint,
+	depth int,
+) (*pkgmodel.PaymentMethod, error) {
+	if method == nil {
+		return nil, merrors.InvalidArgument("payment method is required")
+	}
+	if depth >= maxPrivateMethodResolutionDepth {
+		return nil, merrors.InvalidArgument("payment method resolution depth exceeded")
+	}
+
+	if methodIsAccount(method) {
+		if method.RecipientRef.IsZero() {
+			return nil, merrors.InvalidArgument("account payment method recipient_ref is required")
+		}
+		return s.resolvePrivateByRecipientRef(ctx, organizationRef, method.RecipientRef, endpoint, depth+1)
+	}
+	return method, nil
+}
+
+func methodIsAccount(method *pkgmodel.PaymentMethod) bool {
+	if method == nil {
+		return false
+	}
+	return method.Type == paymentTypeAccount
+}
+
+func pickPreferredPrivateMethod(items []pkgmodel.PaymentMethod, endpoint methodsv1.PrivateEndpoint) *pkgmodel.PaymentMethod {
+	switch endpoint {
+	case methodsv1.PrivateEndpoint_PRIVATE_ENDPOINT_SOURCE:
+		return pickMainThenAnyNonAccount(items)
+	case methodsv1.PrivateEndpoint_PRIVATE_ENDPOINT_DESTINATION:
+		return pickMainThenAnyNonAccount(items)
+	default:
+		return nil
+	}
+}
+
+func pickMainThenAnyNonAccount(items []pkgmodel.PaymentMethod) *pkgmodel.PaymentMethod {
+	for i := range items {
+		if items[i].IsMain && !methodIsAccount(&items[i]) {
+			return &items[i]
+		}
+	}
+	for i := range items {
+		if !methodIsAccount(&items[i]) {
+			return &items[i]
+		}
+	}
+	for i := range items {
+		if items[i].IsMain {
+			return &items[i]
+		}
+	}
+	if len(items) == 0 {
+		return nil
+	}
+	return &items[0]
+}

api/payments/orchestrator/go.mod

@@ -64,5 +64,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
 )

api/payments/orchestrator/go.sum

@@ -211,8 +211,8 @@ 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 v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
 google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=

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

@@ -49,7 +49,7 @@ func stepLiveness(
 
 	pStep, ok := pStepIdx[step.Code]
 	if !ok {
-		logger.Error("step missing in payment plan",
+		logger.Error("Step missing in payment plan",
 			zap.String("step_id", step.Code),
 		)
 		return StepDead
@@ -58,7 +58,7 @@ func stepLiveness(
 	for _, depID := range pStep.DependsOn {
 		dep := eStepIdx[depID]
 		if dep == nil {
-			logger.Warn("dependency missing in execution plan",
+			logger.Warn("Dependency missing in execution plan",
 				zap.String("step_id", step.Code),
 				zap.String("dep_id", depID),
 			)