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

@@ -167,6 +167,121 @@ func TestDefaultPlanBuilder_ErrorsWhenRouteMissing(t *testing.T) {
 	}
 }
 
+func TestDefaultPlanBuilder_UsesSourceCurrencyForCryptoSendWithFX(t *testing.T) {
+	ctx := context.Background()
+	builder := &defaultPlanBuilder{}
+
+	payment := &model.Payment{
+		PaymentRef:     "pay-2",
+		IdempotencyKey: "idem-2",
+		Intent: model.PaymentIntent{
+			Kind:       model.PaymentKindPayout,
+			RequiresFX: true,
+			Source: model.PaymentEndpoint{
+				Type: model.EndpointTypeManagedWallet,
+				ManagedWallet: &model.ManagedWalletEndpoint{
+					ManagedWalletRef: "wallet-2",
+					Asset: &paymenttypes.Asset{
+						Chain:       "TRON",
+						TokenSymbol: "USDT",
+					},
+				},
+			},
+			Destination: model.PaymentEndpoint{
+				Type: model.EndpointTypeCard,
+				Card: &model.CardEndpoint{MaskedPan: "4111"},
+			},
+			Amount:             &paymenttypes.Money{Currency: "USDT", Amount: "1.4"},
+			SettlementMode:     model.SettlementModeFixReceived,
+			SettlementCurrency: "RUB",
+		},
+		LastQuote: &model.PaymentQuoteSnapshot{
+			DebitAmount:              &paymenttypes.Money{Currency: "USDT", Amount: "1.498"},
+			ExpectedSettlementAmount: &paymenttypes.Money{Currency: "RUB", Amount: "108.99"},
+			ExpectedFeeTotal:         &paymenttypes.Money{Currency: "USDT", Amount: "0.098"},
+		},
+	}
+
+	quote := &orchestratorv1.PaymentQuote{
+		DebitAmount:              &moneyv1.Money{Currency: "USDT", Amount: "1.498"},
+		ExpectedSettlementAmount: &moneyv1.Money{Currency: "RUB", Amount: "108.99"},
+		ExpectedFeeTotal:         &moneyv1.Money{Currency: "USDT", Amount: "0.098"},
+	}
+
+	routes := &stubRouteStore{
+		routes: []*model.PaymentRoute{
+			{FromRail: model.RailCrypto, ToRail: model.RailCardPayout, Network: "TRON", IsEnabled: true},
+		},
+	}
+
+	templates := &stubPlanTemplateStore{
+		templates: []*model.PaymentPlanTemplate{
+			{
+				FromRail:  model.RailCrypto,
+				ToRail:    model.RailCardPayout,
+				Network:   "TRON",
+				IsEnabled: true,
+				Steps: []model.OrchestrationStep{
+					{StepID: "crypto_send", Rail: model.RailCrypto, Operation: "payout.crypto"},
+					{StepID: "crypto_fee", Rail: model.RailCrypto, Operation: "fee.send", DependsOn: []string{"crypto_send"}},
+					{StepID: "crypto_observe", Rail: model.RailCrypto, Operation: "observe.confirm", DependsOn: []string{"crypto_send"}},
+					{StepID: "ledger_credit", Rail: model.RailLedger, Operation: "ledger.credit", DependsOn: []string{"crypto_observe"}},
+					{StepID: "card_payout", Rail: model.RailCardPayout, Operation: "payout.card", DependsOn: []string{"ledger_credit"}},
+					{StepID: "ledger_debit", Rail: model.RailLedger, Operation: "ledger.debit", DependsOn: []string{"card_payout"}, CommitPolicy: model.CommitPolicyAfterSuccess, CommitAfter: []string{"card_payout"}},
+				},
+			},
+		},
+	}
+
+	registry := &stubGatewayRegistry{
+		items: []*model.GatewayInstanceDescriptor{
+			{
+				ID:         "crypto-tron",
+				InstanceID: "crypto-tron-2",
+				Rail:       model.RailCrypto,
+				Network:    "TRON",
+				Currencies: []string{"USDT"},
+				Capabilities: model.RailCapabilities{
+					CanPayOut:              true,
+					CanSendFee:             true,
+					RequiresObserveConfirm: true,
+				},
+				Limits:    model.Limits{MinAmount: "0", MaxAmount: "100000"},
+				IsEnabled: true,
+			},
+			{
+				ID:         "card",
+				InstanceID: "card-2",
+				Rail:       model.RailCardPayout,
+				Currencies: []string{"RUB"},
+				Capabilities: model.RailCapabilities{
+					CanPayOut: true,
+				},
+				Limits:    model.Limits{MinAmount: "0", MaxAmount: "100000"},
+				IsEnabled: true,
+			},
+		},
+	}
+
+	plan, err := builder.Build(ctx, payment, quote, routes, templates, registry)
+	if err != nil {
+		t.Fatalf("expected plan, got error: %v", err)
+	}
+	if plan == nil {
+		t.Fatal("expected plan")
+	}
+	if len(plan.Steps) != 6 {
+		t.Fatalf("expected 6 steps, got %d", len(plan.Steps))
+	}
+
+	assertPlanStep(t, plan.Steps[0], "crypto_send", model.RailCrypto, model.RailOperationSend, "crypto-tron", "crypto-tron-2", "USDT", "1.4")
+	assertPlanStep(t, plan.Steps[1], "crypto_fee", model.RailCrypto, model.RailOperationFee, "crypto-tron", "crypto-tron-2", "USDT", "0.098")
+	assertPlanStep(t, plan.Steps[2], "crypto_observe", model.RailCrypto, model.RailOperationObserveConfirm, "crypto-tron", "crypto-tron-2", "", "")
+	assertPlanStep(t, plan.Steps[3], "ledger_credit", model.RailLedger, model.RailOperationCredit, "", "", "RUB", "108.99")
+	assertPlanStep(t, plan.Steps[4], "card_payout", model.RailCardPayout, model.RailOperationSend, "card", "card-2", "RUB", "108.99")
+	assertPlanStep(t, plan.Steps[5], "ledger_debit", model.RailLedger, model.RailOperationDebit, "", "", "RUB", "108.99")
+}
+
 // --- test doubles ---
 
 type stubRouteStore struct {

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

@@ -63,7 +63,7 @@ func resolveSettlementAmount(payment *model.Payment, quote *orchestratorv1.Payme
 	if quote != nil && quote.GetExpectedSettlementAmount() != nil {
 		return moneyFromProto(quote.GetExpectedSettlementAmount())
 	}
-	if payment != nil && payment.LastQuote != nil {
+	if payment != nil && payment.LastQuote != nil && payment.LastQuote.ExpectedSettlementAmount != nil {
 		return cloneMoney(payment.LastQuote.ExpectedSettlementAmount)
 	}
 	return cloneMoney(fallback)
@@ -73,7 +73,7 @@ func resolveDebitAmount(payment *model.Payment, quote *orchestratorv1.PaymentQuo
 	if quote != nil && quote.GetDebitAmount() != nil {
 		return moneyFromProto(quote.GetDebitAmount())
 	}
-	if payment != nil && payment.LastQuote != nil {
+	if payment != nil && payment.LastQuote != nil && payment.LastQuote.DebitAmount != nil {
 		return cloneMoney(payment.LastQuote.DebitAmount)
 	}
 	return cloneMoney(fallback)

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

@@ -7,6 +7,7 @@ import (
 	"github.com/tech/sendico/payments/orchestrator/storage/model"
 	"github.com/tech/sendico/pkg/merrors"
 	paymenttypes "github.com/tech/sendico/pkg/payments/types"
+	oraclev1 "github.com/tech/sendico/pkg/proto/oracle/v1"
 	orchestratorv1 "github.com/tech/sendico/pkg/proto/payments/orchestrator/v1"
 )
 
@@ -29,6 +30,10 @@ func (b *defaultPlanBuilder) buildPlanFromTemplate(ctx context.Context, payment
 	}
 	feeAmount := resolveFeeAmount(payment, quote)
 	feeRequired := isPositiveMoney(feeAmount)
+	sourceSendAmount, err := netSourceAmount(sourceAmount, feeAmount, quote)
+	if err != nil {
+		return nil, err
+	}
 
 	payoutAmount := settlementAmount
 	if destRail == model.RailCardPayout {
@@ -63,7 +68,7 @@ func (b *defaultPlanBuilder) buildPlanFromTemplate(ctx context.Context, payment
 			return nil, err
 		}
 
-		amount, err := stepAmountForAction(action, tpl.Rail, sourceRail, destRail, sourceAmount, settlementAmount, payoutAmount, feeAmount, ledgerDebitAmount, ledgerCreditAmount, feeRequired)
+		amount, err := stepAmountForAction(action, tpl.Rail, sourceRail, destRail, sourceSendAmount, settlementAmount, payoutAmount, feeAmount, ledgerDebitAmount, ledgerCreditAmount, feeRequired)
 		if err != nil {
 			return nil, err
 		}
@@ -94,7 +99,7 @@ func (b *defaultPlanBuilder) buildPlanFromTemplate(ctx context.Context, payment
 			instanceID := stepInstanceIDForRail(payment.Intent, tpl.Rail, sourceRail, destRail)
 			checkAmount := amount
 			if action == model.RailOperationObserveConfirm {
-				checkAmount = observeAmountForRail(tpl.Rail, sourceAmount, settlementAmount, payoutAmount)
+				checkAmount = observeAmountForRail(tpl.Rail, sourceSendAmount, settlementAmount, payoutAmount)
 			}
 			gw, err := ensureGatewayForAction(ctx, gateways, gatewaysByRail, tpl.Rail, network, checkAmount, action, instanceID, sendDirectionForRail(tpl.Rail))
 			if err != nil {
@@ -165,7 +170,7 @@ func actionForOperation(operation string) (model.RailOperation, error) {
 	return model.RailOperationUnspecified, merrors.InvalidArgument("plan builder: unsupported operation")
 }
 
-func stepAmountForAction(action model.RailOperation, rail, sourceRail, destRail model.Rail, sourceAmount, settlementAmount, payoutAmount, feeAmount, ledgerDebitAmount, ledgerCreditAmount *paymenttypes.Money, feeRequired bool) (*paymenttypes.Money, error) {
+func stepAmountForAction(action model.RailOperation, rail, sourceRail, destRail model.Rail, sourceSendAmount, settlementAmount, payoutAmount, feeAmount, ledgerDebitAmount, ledgerCreditAmount *paymenttypes.Money, feeRequired bool) (*paymenttypes.Money, error) {
 	switch action {
 	case model.RailOperationDebit:
 		if rail == model.RailLedger {
@@ -180,10 +185,7 @@ func stepAmountForAction(action model.RailOperation, rail, sourceRail, destRail
 	case model.RailOperationSend:
 		switch rail {
 		case sourceRail:
-			if feeRequired {
+			return cloneMoney(sourceSendAmount), nil
-				return cloneMoney(settlementAmount), nil
-			}
-			return cloneMoney(sourceAmount), nil
 		case destRail:
 			return cloneMoney(payoutAmount), nil
 		default:
@@ -221,12 +223,12 @@ func stepInstanceIDForRail(intent model.PaymentIntent, rail, sourceRail, destRai
 func observeAmountForRail(rail model.Rail, source, settlement, payout *paymenttypes.Money) *paymenttypes.Money {
 	switch rail {
 	case model.RailCrypto, model.RailFiatOnRamp:
-		if settlement != nil {
-			return settlement
-		}
 		if source != nil {
 			return source
 		}
+		if settlement != nil {
+			return settlement
+		}
 	case model.RailProviderSettlement:
 		if settlement != nil {
 			return settlement
@@ -242,6 +244,48 @@ func observeAmountForRail(rail model.Rail, source, settlement, payout *paymentty
 	return source
 }
 
+func netSourceAmount(sourceAmount, feeAmount *paymenttypes.Money, quote *orchestratorv1.PaymentQuote) (*paymenttypes.Money, error) {
+	if sourceAmount == nil {
+		return nil, merrors.InvalidArgument("plan builder: source amount is required")
+	}
+	netAmount := cloneMoney(sourceAmount)
+	if !isPositiveMoney(feeAmount) {
+		return netAmount, nil
+	}
+
+	currency := strings.TrimSpace(sourceAmount.GetCurrency())
+	if currency == "" {
+		return netAmount, nil
+	}
+	var fxQuote *oraclev1.Quote
+	if quote != nil {
+		fxQuote = quote.GetFxQuote()
+	}
+	convertedFee, err := ensureCurrency(protoMoney(feeAmount), currency, fxQuote)
+	if err != nil {
+		return nil, err
+	}
+	if convertedFee == nil {
+		return netAmount, nil
+	}
+	sourceValue, err := decimalFromMoney(sourceAmount)
+	if err != nil {
+		return nil, err
+	}
+	feeValue, err := decimalFromMoney(convertedFee)
+	if err != nil {
+		return nil, err
+	}
+	netValue := sourceValue.Sub(feeValue)
+	if netValue.IsNegative() {
+		return nil, merrors.InvalidArgument("plan builder: fee exceeds source amount")
+	}
+	return &paymenttypes.Money{
+		Currency: currency,
+		Amount:   netValue.String(),
+	}, nil
+}
+
 func requireMoney(amount *paymenttypes.Money, label string) (*paymenttypes.Money, error) {
 	if amount == nil || strings.TrimSpace(amount.GetAmount()) == "" || strings.TrimSpace(amount.GetCurrency()) == "" {
 		return nil, merrors.InvalidArgument("plan builder: " + label + " is required")