quote requests are paused while the payout amount is being edited

api/gateway/mntx/client/client.go

@@ -7,7 +7,6 @@ import (
 
 	"github.com/tech/sendico/pkg/merrors"
 	mntxv1 "github.com/tech/sendico/pkg/proto/gateway/mntx/v1"
-	"go.uber.org/zap"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 )
@@ -24,7 +23,6 @@ type gatewayClient struct {
 	conn   *grpc.ClientConn
 	client mntxv1.MntxGatewayServiceClient
 	cfg    Config
-	logger *zap.Logger
 }
 
 // New dials the Monetix gateway.
@@ -49,7 +47,6 @@ func New(ctx context.Context, cfg Config, opts ...grpc.DialOption) (Client, erro
 		conn:   conn,
 		client: mntxv1.NewMntxGatewayServiceClient(conn),
 		cfg:    cfg,
-		logger: cfg.Logger,
 	}, nil
 }
 
@@ -60,39 +57,28 @@ func (g *gatewayClient) Close() error {
 	return nil
 }
 
-func (g *gatewayClient) callContext(ctx context.Context, method string) (context.Context, context.CancelFunc) {
+func (g *gatewayClient) callContext(ctx context.Context) (context.Context, context.CancelFunc) {
-	if ctx == nil {
-		ctx = context.Background()
-	}
 	timeout := g.cfg.CallTimeout
 	if timeout <= 0 {
 		timeout = 5 * time.Second
 	}
-	fields := []zap.Field{
-		zap.String("method", method),
-		zap.Duration("timeout", timeout),
-	}
-	if deadline, ok := ctx.Deadline(); ok {
-		fields = append(fields, zap.Time("parent_deadline", deadline), zap.Duration("parent_deadline_in", time.Until(deadline)))
-	}
-	g.logger.Info("Mntx gateway client call timeout applied", fields...)
 	return context.WithTimeout(ctx, timeout)
 }
 
 func (g *gatewayClient) CreateCardPayout(ctx context.Context, req *mntxv1.CardPayoutRequest) (*mntxv1.CardPayoutResponse, error) {
-	ctx, cancel := g.callContext(ctx, "CreateCardPayout")
+	ctx, cancel := g.callContext(ctx)
 	defer cancel()
 	return g.client.CreateCardPayout(ctx, req)
 }
 
 func (g *gatewayClient) CreateCardTokenPayout(ctx context.Context, req *mntxv1.CardTokenPayoutRequest) (*mntxv1.CardTokenPayoutResponse, error) {
-	ctx, cancel := g.callContext(ctx, "CreateCardTokenPayout")
+	ctx, cancel := g.callContext(ctx)
 	defer cancel()
 	return g.client.CreateCardTokenPayout(ctx, req)
 }
 
 func (g *gatewayClient) GetCardPayoutStatus(ctx context.Context, req *mntxv1.GetCardPayoutStatusRequest) (*mntxv1.GetCardPayoutStatusResponse, error) {
-	ctx, cancel := g.callContext(ctx, "GetCardPayoutStatus")
+	ctx, cancel := g.callContext(ctx)
 	defer cancel()
 	return g.client.GetCardPayoutStatus(ctx, req)
 }

api/gateway/mntx/client/config.go

@@ -1,17 +1,12 @@
 package client
 
-import (
+import "time"
-	"time"
-
-	"go.uber.org/zap"
-)
 
 // Config holds Monetix gateway client settings.
 type Config struct {
 	Address     string
 	DialTimeout time.Duration
 	CallTimeout time.Duration
-	Logger      *zap.Logger
 }
 
 func (c *Config) setDefaults() {
@@ -21,7 +16,4 @@ func (c *Config) setDefaults() {
 	if c.CallTimeout <= 0 {
 		c.CallTimeout = 10 * time.Second
 	}
-	if c.Logger == nil {
-		c.Logger = zap.NewNop()
-	}
 }

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

@@ -1,10 +1,8 @@
 package gateway
 
 import (
-	"bytes"
 	"context"
 	"crypto/hmac"
-	"encoding/json"
 	"net/http"
 	"strings"
 
@@ -45,11 +43,10 @@ type callbackOperation struct {
 		Currency string `json:"currency"`
 	} `json:"sum_converted"`
 	Provider struct {
-		ID         int64  `json:"id"`
+		ID        int64  `json:"id"`
-		PaymentID  string `json:"payment_id"`
+		PaymentID string `json:"payment_id"`
-		AuthCode   string `json:"auth_code"`
+		Date      string `json:"date"`
-		EndpointID int64  `json:"endpoint_id"`
+		AuthCode  string `json:"auth_code"`
-		Date       string `json:"date"`
 	} `json:"provider"`
 	Code    string `json:"code"`
 	Message string `json:"message"`
@@ -59,11 +56,7 @@ type monetixCallback struct {
 	ProjectID int64           `json:"project_id"`
 	Payment   callbackPayment `json:"payment"`
 	Account   struct {
-		Number      string `json:"number"`
+		Number string `json:"number"`
-		Type        string `json:"type"`
-		CardHolder  string `json:"card_holder"`
-		ExpiryMonth string `json:"expiry_month"`
-		ExpiryYear  string `json:"expiry_year"`
 	} `json:"account"`
 	Customer struct {
 		ID string `json:"id"`
@@ -127,48 +120,17 @@ func fallbackProviderPaymentID(cb monetixCallback) string {
 	return cb.Payment.ID
 }
 
-func verifyCallbackSignature(payload []byte, secret string) (string, error) {
+func verifyCallbackSignature(cb monetixCallback, secret string) error {
-	root, err := decodeCallbackPayload(payload)
+	expected := cb.Signature
+	cb.Signature = ""
+	calculated, err := monetix.SignPayload(cb, secret)
 	if err != nil {
-		return "", err
+		return err
 	}
-	signature, ok := signatureFromPayload(root)
+	if subtleConstantTimeCompare(expected, calculated) {
-	if !ok || strings.TrimSpace(signature) == "" {
+		return nil
-		return "", merrors.InvalidArgument("signature is missing")
 	}
-	calculated, err := monetix.SignPayload(root, secret)
+	return merrors.DataConflict("signature mismatch")
-	if err != nil {
-		return signature, err
-	}
-	if subtleConstantTimeCompare(signature, calculated) {
-		return signature, nil
-	}
-	return signature, merrors.DataConflict("signature mismatch")
-}
-
-func decodeCallbackPayload(payload []byte) (any, error) {
-	var root any
-	decoder := json.NewDecoder(bytes.NewReader(payload))
-	decoder.UseNumber()
-	if err := decoder.Decode(&root); err != nil {
-		return nil, err
-	}
-	return root, nil
-}
-
-func signatureFromPayload(root any) (string, bool) {
-	payload, ok := root.(map[string]any)
-	if !ok {
-		return "", false
-	}
-	for key, value := range payload {
-		if !strings.EqualFold(key, "signature") {
-			continue
-		}
-		signature, ok := value.(string)
-		return signature, ok
-	}
-	return "", false
 }
 
 func subtleConstantTimeCompare(a, b string) bool {

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

@@ -1,7 +1,6 @@
 package gateway
 
 import (
-	"encoding/json"
 	"testing"
 	"time"
 
@@ -39,11 +38,11 @@ func TestMapCallbackToState_StatusMapping(t *testing.T) {
 	cfg := monetix.DefaultConfig()
 
 	cases := []struct {
-		name            string
+		name           string
-		paymentStatus   string
+		paymentStatus  string
 		operationStatus string
-		code            string
+		code           string
-		expectedStatus  mntxv1.PayoutStatus
+		expectedStatus mntxv1.PayoutStatus
 		expectedOutcome string
 	}{
 		{
@@ -120,20 +119,12 @@ func TestVerifyCallbackSignature(t *testing.T) {
 		t.Fatalf("failed to sign payload: %v", err)
 	}
 	cb.Signature = sig
-	payload, err := json.Marshal(cb)
+	if err := verifyCallbackSignature(cb, secret); err != nil {
-	if err != nil {
-		t.Fatalf("failed to marshal callback: %v", err)
-	}
-	if _, err := verifyCallbackSignature(payload, secret); err != nil {
 		t.Fatalf("expected valid signature, got %v", err)
 	}
 
 	cb.Signature = "invalid"
-	payload, err = json.Marshal(cb)
+	if err := verifyCallbackSignature(cb, secret); err == nil {
-	if err != nil {
-		t.Fatalf("failed to marshal callback: %v", err)
-	}
-	if _, err := verifyCallbackSignature(payload, secret); err == nil {
 		t.Fatalf("expected signature mismatch error")
 	}
 }

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

@@ -3,7 +3,6 @@ package gateway
 import (
 	"context"
 	"encoding/json"
-	"errors"
 	"net/http"
 	"strings"
 
@@ -339,19 +338,13 @@ func (p *cardPayoutProcessor) ProcessCallback(ctx context.Context, payload []byt
 		return http.StatusBadRequest, err
 	}
 
-	signature, err := verifyCallbackSignature(payload, p.config.SecretKey)
+	if strings.TrimSpace(cb.Signature) == "" {
-	if err != nil {
+		p.logger.Warn("Monetix callback signature is missing", zap.String("payout_id", cb.Payment.ID))
-		status := http.StatusBadRequest
+		return http.StatusBadRequest, merrors.InvalidArgument("signature is missing")
-		if errors.Is(err, merrors.ErrDataConflict) {
+	}
-			status = http.StatusForbidden
+	if err := verifyCallbackSignature(cb, p.config.SecretKey); err != nil {
-		}
+		p.logger.Warn("Monetix callback signature check failed", zap.Error(err))
-		p.logger.Warn("Monetix callback signature check failed",
+		return http.StatusForbidden, err
-			zap.String("payout_id", cb.Payment.ID),
-			zap.String("signature", signature),
-			zap.String("payload", string(payload)),
-			zap.Error(err),
-		)
-		return status, err
 	}
 
 	state, statusLabel := mapCallbackToState(p.clock, p.config, cb)

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

@@ -106,23 +106,12 @@ func (c *Client) sendTokenization(ctx context.Context, req CardTokenizeRequest)
 		zap.String("masked_pan", MaskPAN(req.Card.PAN)),
 	)
 
-	logRequestDeadline(c.logger, ctx, url)
 	start := time.Now()
 	resp, err := c.client.Do(httpReq)
 	duration := time.Since(start)
 	if err != nil {
 		observeRequest(outcomeNetworkError, duration)
-		fields := []zap.Field{
+		c.logger.Warn("Monetix tokenization request failed", zap.Error(err))
-			zap.String("url", url),
-			zap.Error(err),
-		}
-		if ctxErr := ctx.Err(); ctxErr != nil {
-			fields = append(fields, zap.NamedError("ctx_error", ctxErr))
-		}
-		if deadline, ok := ctx.Deadline(); ok {
-			fields = append(fields, zap.Time("deadline", deadline), zap.Duration("time_until_deadline", time.Until(deadline)))
-		}
-		c.logger.Warn("Monetix tokenization request failed", fields...)
 		return nil, merrors.Internal("monetix tokenization request failed: " + err.Error())
 	}
 	defer resp.Body.Close()
@@ -232,23 +221,11 @@ func (c *Client) send(ctx context.Context, req any, path string, dispatchLog fun
 		dispatchLog()
 	}
 
-	logRequestDeadline(c.logger, ctx, url)
 	start := time.Now()
 	resp, err := c.client.Do(httpReq)
 	duration := time.Since(start)
 	if err != nil {
 		observeRequest(outcomeNetworkError, duration)
-		fields := []zap.Field{
-			zap.String("url", url),
-			zap.Error(err),
-		}
-		if ctxErr := ctx.Err(); ctxErr != nil {
-			fields = append(fields, zap.NamedError("ctx_error", ctxErr))
-		}
-		if deadline, ok := ctx.Deadline(); ok {
-			fields = append(fields, zap.Time("deadline", deadline), zap.Duration("time_until_deadline", time.Until(deadline)))
-		}
-		c.logger.Warn("Monetix request failed", fields...)
 		return nil, merrors.Internal("monetix request failed: " + err.Error())
 	}
 	defer resp.Body.Close()
@@ -311,23 +288,3 @@ func clearSignature(req any) (func(string), error) {
 		return nil, merrors.Internal("unsupported monetix payload type for signing")
 	}
 }
-
-func logRequestDeadline(logger *zap.Logger, ctx context.Context, url string) {
-	if logger == nil {
-		return
-	}
-	if ctx == nil {
-		logger.Info("Monetix request context is nil", zap.String("url", url))
-		return
-	}
-	deadline, ok := ctx.Deadline()
-	if !ok {
-		logger.Info("Monetix request context has no deadline", zap.String("url", url))
-		return
-	}
-	logger.Info("Monetix request context deadline",
-		zap.String("url", url),
-		zap.Time("deadline", deadline),
-		zap.Duration("time_until_deadline", time.Until(deadline)),
-	)
-}

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

@@ -146,66 +146,3 @@ func TestSignPayload_EthEstimateGasExample(t *testing.T) {
 		t.Fatalf("unexpected signature\nexpected: %s\ngot: %s", expected, got)
 	}
 }
-
-func TestSignPayload_MonetixCallbackExample(t *testing.T) {
-	payload := map[string]any{
-		"customer": map[string]any{
-			"id": "694ece88df756c2672dc6ce8",
-		},
-		"account": map[string]any{
-			"number":       "220070******0161",
-			"type":         "mir",
-			"card_holder":  "STEPHAN",
-			"expiry_month": "03",
-			"expiry_year":  "2030",
-		},
-		"project_id": 157432,
-		"payment": map[string]any{
-			"id":     "6952d0b307d2916aba87d4e8",
-			"type":   "payout",
-			"status": "success",
-			"date":   "2025-12-29T19:04:24+0000",
-			"method": "card",
-			"sum": map[string]any{
-				"amount":   10849,
-				"currency": "RUB",
-			},
-			"description": "",
-		},
-		"operation": map[string]any{
-			"sum_initial": map[string]any{
-				"amount":   10849,
-				"currency": "RUB",
-			},
-			"sum_converted": map[string]any{
-				"amount":   10849,
-				"currency": "RUB",
-			},
-			"code":    "0",
-			"message": "Success",
-			"provider": map[string]any{
-				"id":          26226,
-				"payment_id":  "a3761838-eabc-4c65-aa36-c854c47a226b",
-				"auth_code":   "",
-				"endpoint_id": 26226,
-				"date":        "2025-12-29T19:04:23+0000",
-			},
-			"id":           int64(5089807000008124),
-			"type":         "payout",
-			"status":       "success",
-			"date":         "2025-12-29T19:04:24+0000",
-			"created_date": "2025-12-29T19:04:21+0000",
-			"request_id":   "7c3032f00629c94ad78e399c87da936f1cdc30de-2559ba11d6958d558a9f8ab8c20474d33061c654-05089808",
-		},
-		"signature": "IBgtwCoxhMUxF15q8DLc7orYOIJomeiaNpWs8JHHsdDYPKJsIKn4T+kYavPnKTO+yibhCLNKeL+hk2oWg9wPCQ==",
-	}
-
-	got, err := SignPayload(payload, "1")
-	if err != nil {
-		t.Fatalf("failed to sign payload: %v", err)
-	}
-	expected := "IBgtwCoxhMUxF15q8DLc7orYOIJomeiaNpWs8JHHsdDYPKJsIKn4T+kYavPnKTO+yibhCLNKeL+hk2oWg9wPCQ=="
-	if got != expected {
-		t.Fatalf("unexpected signature\nexpected: %s\ngot: %s", expected, got)
-	}
-}

api/payments/orchestrator/config.yml

@@ -54,7 +54,7 @@ gateway:
 mntx:
   address: "sendico_mntx_gateway:50075"
   dial_timeout_seconds: 5
-  call_timeout_seconds: 15
+  call_timeout_seconds: 3
   insecure: true
 
 oracle:

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

@@ -273,7 +273,6 @@ func (i *Imp) initMntxClient(cfg clientConfig) mntxclient.Client {
 		Address:     addr,
 		DialTimeout: cfg.dialTimeout(),
 		CallTimeout: cfg.callTimeout(),
-		Logger:      i.logger.Named("client.mntx"),
 	})
 	if err != nil {
 		i.logger.Warn("Failed to connect to mntx gateway service", zap.String("address", addr), zap.Error(err))

frontend/pshared/lib/data/mapper/payment/payment.dart

@@ -2,16 +2,25 @@ import 'package:pshared/data/dto/payment/card.dart';
 import 'package:pshared/data/dto/payment/card_token.dart';
 import 'package:pshared/data/dto/payment/endpoint.dart';
 import 'package:pshared/data/dto/payment/external_chain.dart';
+import 'package:pshared/data/dto/payment/iban.dart';
 import 'package:pshared/data/dto/payment/ledger.dart';
 import 'package:pshared/data/dto/payment/managed_wallet.dart';
+import 'package:pshared/data/dto/payment/russian_bank.dart';
+import 'package:pshared/data/dto/payment/wallet.dart';
 import 'package:pshared/data/mapper/payment/asset.dart';
+import 'package:pshared/data/mapper/payment/iban.dart';
 import 'package:pshared/data/mapper/payment/type.dart';
+import 'package:pshared/data/mapper/payment/russian_bank.dart';
+import 'package:pshared/data/mapper/payment/wallet.dart';
 import 'package:pshared/models/payment/methods/card.dart';
 import 'package:pshared/models/payment/methods/card_token.dart';
 import 'package:pshared/models/payment/methods/crypto_address.dart';
 import 'package:pshared/models/payment/methods/data.dart';
+import 'package:pshared/models/payment/methods/iban.dart';
 import 'package:pshared/models/payment/methods/ledger.dart';
 import 'package:pshared/models/payment/methods/managed_wallet.dart';
+import 'package:pshared/models/payment/methods/russian_bank.dart';
+import 'package:pshared/models/payment/methods/wallet.dart';
 import 'package:pshared/models/payment/type.dart';
 
 
@@ -75,8 +84,27 @@ extension PaymentMethodDataEndpointMapper on PaymentMethodData {
           ).toJson(),
           metadata: metadata,
         );
-      default:
+      case PaymentType.iban:
-        throw UnsupportedError('Unsupported payment endpoint type: $type');
+        final payload = this as IbanPaymentMethod;
+        return PaymentEndpointDTO(
+          type: paymentTypeToValue(type),
+          data: payload.toDTO().toJson(),
+          metadata: metadata,
+        );
+      case PaymentType.bankAccount:
+        final payload = this as RussianBankAccountPaymentMethod;
+        return PaymentEndpointDTO(
+          type: paymentTypeToValue(type),
+          data: payload.toDTO().toJson(),
+          metadata: metadata,
+        );
+      case PaymentType.wallet:
+        final payload = this as WalletPaymentMethod;
+        return PaymentEndpointDTO(
+          type: paymentTypeToValue(type),
+          data: payload.toDTO().toJson(),
+          metadata: metadata,
+        );
     }
   }
 }
@@ -126,8 +154,15 @@ extension PaymentEndpointDTOMapper on PaymentEndpointDTO {
           maskedPan: payload.maskedPan,
           metadata: metadata,
         );
-      default:
+      case PaymentType.iban:
-        throw UnsupportedError('Unsupported payment endpoint type: ${paymentTypeFromValue(type)}');
+        final payload = IbanPaymentDataDTO.fromJson(data);
+        return payload.toDomain();
+      case PaymentType.bankAccount:
+        final payload = RussianBankAccountPaymentDataDTO.fromJson(data);
+        return payload.toDomain();
+      case PaymentType.wallet:
+        final payload = WalletPaymentDataDTO.fromJson(data);
+        return payload.toDomain();
     }
   }
 }

frontend/pshared/lib/provider/payment/amount.dart

@@ -4,9 +4,11 @@ import 'package:flutter/material.dart';
 class PaymentAmountProvider with ChangeNotifier {
   double _amount = 10.0;
   bool _payerCoversFee = true;
+  bool _isEditing = false;
 
   double get amount => _amount;
   bool get payerCoversFee => _payerCoversFee;
+  bool get isEditing => _isEditing;
 
   void setAmount(double value) {
     _amount = value;
@@ -17,4 +19,10 @@ class PaymentAmountProvider with ChangeNotifier {
     _payerCoversFee = value;
     notifyListeners();
   }
+
+  void setEditing(bool value) {
+    if (_isEditing == value) return;
+    _isEditing = value;
+    notifyListeners();
+  }
 }

frontend/pshared/lib/provider/payment/provider.dart

@@ -31,7 +31,7 @@ class PaymentProvider extends ChangeNotifier {
 
   Future<Payment?> pay({String? idempotencyKey, Map<String, String>? metadata}) async {
     if (!_organization.isOrganizationSet) throw StateError('Organization is not set');
-    if (!_quotation.isReady) throw StateError('Quotation is not ready');
+    if (!_quotation.hasLiveQuote) throw StateError('Quotation is not ready');
     final quoteRef = _quotation.quotation?.quoteRef;
     if (quoteRef == null || quoteRef.isEmpty) {
       throw StateError('Quotation reference is not set');

frontend/pshared/lib/provider/payment/quotation.dart

@@ -1,3 +1,6 @@
+import 'dart:async';
+import 'dart:convert';
+
 import 'package:flutter/material.dart';
 
 import 'package:collection/collection.dart';
@@ -15,6 +18,7 @@ import 'package:pshared/models/payment/kind.dart';
 import 'package:pshared/models/payment/methods/managed_wallet.dart';
 import 'package:pshared/models/payment/methods/type.dart';
 import 'package:pshared/models/payment/money.dart';
+import 'package:pshared/models/payment/type.dart';
 import 'package:pshared/models/payment/settlement_mode.dart';
 import 'package:pshared/models/payment/intent.dart';
 import 'package:pshared/models/payment/quote.dart';
@@ -34,9 +38,19 @@ class QuotationProvider extends ChangeNotifier {
   Resource<PaymentQuote> _quotation = Resource(data: null, isLoading: false, error: null);
   late OrganizationsProvider _organizations;
   bool _isLoaded = false;
+  bool _organizationAttached = false;
+  PaymentIntent? _pendingIntent;
+  String? _lastRequestSignature;
+  Timer? _debounceTimer;
+  Timer? _expirationTimer;
+  bool _autoRefreshEnabled = true;
+  bool _amountEditing = false;
+
+  static const _inputDebounce = Duration(milliseconds: 500);
+  static const _expiryGracePeriod = Duration(seconds: 1);
 
   void update(
-    OrganizationsProvider venue, 
+    OrganizationsProvider venue,
     PaymentAmountProvider payment,
     WalletsProvider wallets,
     PaymentFlowProvider flow,
@@ -44,44 +58,81 @@ class QuotationProvider extends ChangeNotifier {
     PaymentMethodsProvider methods,
   ) {
     _organizations = venue;
-    final t = flow.selectedType;
+    _organizationAttached = true;
-    final method = methods.methods.firstWhereOrNull((m) => m.type == t);
+    final wasEditing = _amountEditing;
-    if ((wallets.selectedWallet != null) && (method != null)) {
+    _amountEditing = payment.isEditing;
-      final customer = _buildCustomer(
+    final editingJustEnded = wasEditing && !_amountEditing;
-        recipient: recipients.currentObject,
+    _pendingIntent = _buildIntent(
-        method: method,
+      payment: payment,
-      );
+      wallets: wallets,
-      getQuotation(PaymentIntent(
+      flow: flow,
-        kind: PaymentKind.payout,
+      recipients: recipients,
-        amount: Money(
+      methods: methods,
-          amount: payment.amount.toString(), 
+    );
-          // TODO: adapt to possible other sources
+
-          currency: currencyCodeToString(wallets.selectedWallet!.currency),
+    if (_pendingIntent == null) {
-        ),
+      _reset();
-        destination: method.data,
+      return;
-        source: ManagedWalletPaymentMethod(
-          managedWalletRef: wallets.selectedWallet!.id,
-        ),
-        fx: FxIntent(
-          pair: CurrencyPair(
-            base: currencyCodeToString(wallets.selectedWallet!.currency), 
-            quote: 'RUB', // TODO: exentd target currencies
-          ),
-          side: FxSide.sellBaseBuyQuote,
-        ),
-        settlementMode: payment.payerCoversFee ? SettlementMode.fixReceived : SettlementMode.fixSource,
-        customer: customer,
-      ));
     }
+
+    if (_amountEditing) {
+      _debounceTimer?.cancel();
+      return;
+    }
+
+    if (editingJustEnded) {
+      refreshNow(force: false);
+      return;
+    }
+
+    _scheduleQuotationRefresh();
   }
 
-  PaymentQuote? get quotation => _quotation.data;
+  PaymentQuote? get quotation => hasQuoteForCurrentIntent ? _quotation.data : null;
+  bool get isLoading => _quotation.isLoading;
+  Exception? get error => _quotation.error;
+  bool get autoRefreshEnabled => _autoRefreshEnabled;
+  bool get canRequestQuote => _organizationAttached && _pendingIntent != null && _organizations.isOrganizationSet;
 
-  bool get isReady => _isLoaded && !_quotation.isLoading && _quotation.error == null;
+  bool get _isExpired {
+    final remaining = timeToExpire;
+    return remaining != null && remaining <= Duration.zero;
+  }
 
-  Asset? get fee => quotation == null ? null : createAsset(quotation!.expectedFeeTotal!.currency, quotation!.expectedFeeTotal!.amount);
+  bool get hasQuoteForCurrentIntent {
-  Asset? get total => quotation == null ? null : createAsset(quotation!.debitAmount!.currency, quotation!.debitAmount!.amount);
+    if (_pendingIntent == null || _lastRequestSignature == null) return false;
-  Asset? get recipientGets => quotation == null ? null : createAsset(quotation!.expectedSettlementAmount!.currency, quotation!.expectedSettlementAmount!.amount);
+    return _lastRequestSignature == _signature(_pendingIntent!);
+  }
+
+  bool get isReady => _isLoaded && !_isExpired && !_quotation.isLoading && _quotation.error == null;
+
+  bool get hasLiveQuote => isReady && quotation != null;
+
+  Duration? get timeToExpire {
+    final expiresAt = _quoteExpiry;
+    if (expiresAt == null) return null;
+    final diff = expiresAt.difference(DateTime.now().toUtc());
+    return diff.isNegative ? Duration.zero : diff;
+  }
+
+  Asset? get fee => quotation == null
+      ? null
+      : createAsset(
+          quotation!.expectedFeeTotal!.currency,
+          quotation!.expectedFeeTotal!.amount,
+        );
+  Asset? get total => quotation == null
+      ? null
+      : createAsset(
+          quotation!.debitAmount!.currency,
+          quotation!.debitAmount!.amount,
+        );
+  Asset? get recipientGets => quotation == null
+      ? null
+      : createAsset(
+          quotation!.expectedSettlementAmount!.currency,
+          quotation!.expectedSettlementAmount!.amount,
+        );
 
   Customer _buildCustomer({
     required Recipient? recipient,
@@ -140,19 +191,128 @@ class QuotationProvider extends ChangeNotifier {
     notifyListeners();
   }
 
-  Future<PaymentQuote?> getQuotation(PaymentIntent intent) async {
+  void refreshNow({bool force = true}) {
-    if (!_organizations.isOrganizationSet) throw StateError('Organization is not set');
+    _debounceTimer?.cancel();
+    if (!canRequestQuote) {
+      if (_pendingIntent == null) {
+        _reset();
+      }
+      return;
+    }
+    unawaited(_requestQuotation(_pendingIntent!, force: force));
+  }
+
+  void setAutoRefresh(bool enabled) {
+    if (!_organizationAttached) return;
+    if (_autoRefreshEnabled == enabled) return;
+    _autoRefreshEnabled = enabled;
+    if (_autoRefreshEnabled && (!hasLiveQuote || _isExpired) && _pendingIntent != null) {
+      unawaited(_requestQuotation(_pendingIntent!, force: true));
+    } else {
+      _startExpirationTimer();
+      notifyListeners();
+    }
+  }
+
+  @override
+  void dispose() {
+    _debounceTimer?.cancel();
+    _expirationTimer?.cancel();
+    super.dispose();
+  }
+
+  PaymentIntent? _buildIntent({
+    required PaymentAmountProvider payment,
+    required WalletsProvider wallets,
+    required PaymentFlowProvider flow,
+    required RecipientsProvider recipients,
+    required PaymentMethodsProvider methods,
+  }) {
+    if (!_organizationAttached || !_organizations.isOrganizationSet) return null;
+    final type = flow.selectedType;
+    final method = methods.methods.firstWhereOrNull((m) => m.type == type);
+    final wallet = wallets.selectedWallet;
+
+    if (wallet == null || method == null) return null;
+
+    final customer = _buildCustomer(
+      recipient: recipients.currentObject,
+      method: method,
+    );
+
+    return PaymentIntent(
+      kind: PaymentKind.payout,
+      amount: Money(
+        amount: payment.amount.toString(),
+        // TODO: adapt to possible other sources
+        currency: currencyCodeToString(wallet.currency),
+      ),
+      destination: method.data,
+      source: ManagedWalletPaymentMethod(
+        managedWalletRef: wallet.id,
+      ),
+      fx: FxIntent(
+        pair: CurrencyPair(
+          base: currencyCodeToString(wallet.currency),
+          quote: 'RUB', // TODO: exentd target currencies
+        ),
+        side: FxSide.sellBaseBuyQuote,
+      ),
+      settlementMode: payment.payerCoversFee ? SettlementMode.fixReceived : SettlementMode.fixSource,
+      customer: customer,
+    );
+  }
+
+  void _scheduleQuotationRefresh() {
+    _debounceTimer?.cancel();
+    if (_pendingIntent == null) {
+      _reset();
+      return;
+    }
+
+    _debounceTimer = Timer(_inputDebounce, () {
+      unawaited(_requestQuotation(_pendingIntent!, force: false));
+    });
+  }
+
+  Future<PaymentQuote?> _requestQuotation(PaymentIntent intent, {required bool force}) async {
+    if (!_organizationAttached || !_organizations.isOrganizationSet) {
+      _reset();
+      return null;
+    }
+
+    final destinationType = intent.destination?.type;
+    if (destinationType == PaymentType.bankAccount) {
+      _setResource(
+        _quotation.copyWith(
+          data: null,
+          isLoading: false,
+          error: Exception('Unsupported payment endpoint type: $destinationType'),
+        ),
+      );
+      return null;
+    }
+
+    final signature = _signature(intent);
+    final isSameIntent = _lastRequestSignature == signature;
+    if (!force && isSameIntent && hasLiveQuote) {
+      _startExpirationTimer();
+      return _quotation.data;
+    }
+
+    _setResource(_quotation.copyWith(isLoading: true, error: null));
     try {
-      _quotation = _quotation.copyWith(isLoading: true, error: null);
       final response = await QuotationService.getQuotation(
-        _organizations.current.id, 
+        _organizations.current.id,
         QuotePaymentRequest(
           idempotencyKey: Uuid().v4(),
           intent: intent.toDTO(),
         ),
       );
       _isLoaded = true;
+      _lastRequestSignature = signature;
       _setResource(_quotation.copyWith(data: response, isLoading: false, error: null));
+      _startExpirationTimer();
     } catch (e) {
       _setResource(_quotation.copyWith(
         data: null,
@@ -160,13 +320,68 @@ class QuotationProvider extends ChangeNotifier {
         isLoading: false,
       ));
     }
-    notifyListeners();
     return _quotation.data;
   }
 
-  void reset() {
+  void _startExpirationTimer() {
-    _setResource(Resource(data: null, isLoading: false, error: null));
+    _expirationTimer?.cancel();
+    final remaining = timeToExpire;
+    if (remaining == null) return;
+
+    final triggerOffset = _autoRefreshEnabled ? _expiryGracePeriod : Duration.zero;
+    final duration = remaining > triggerOffset ? remaining - triggerOffset : Duration.zero;
+    _expirationTimer = Timer(duration, () {
+      if (_autoRefreshEnabled && _pendingIntent != null) {
+        unawaited(_requestQuotation(_pendingIntent!, force: true));
+      } else {
+        notifyListeners();
+      }
+    });
+  }
+
+  void _reset() {
+    _debounceTimer?.cancel();
+    _expirationTimer?.cancel();
+    _pendingIntent = null;
+    _lastRequestSignature = null;
     _isLoaded = false;
-    notifyListeners();
+    _setResource(Resource(data: null, isLoading: false, error: null));
+  }
+
+  DateTime? get _quoteExpiry {
+    final expiresAt = quotation?.fxQuote?.expiresAtUnixMs;
+    if (expiresAt == null) return null;
+    return DateTime.fromMillisecondsSinceEpoch(expiresAt, isUtc: true);
+  }
+
+  String _signature(PaymentIntent intent) {
+    try {
+      return jsonEncode(intent.toDTO().toJson());
+    } catch (_) {
+      return jsonEncode({
+        'kind': intent.kind.toString(),
+        'source': intent.source?.type.toString(),
+        'destination': intent.destination?.type.toString(),
+        'amount': {
+          'value': intent.amount?.amount,
+          'currency': intent.amount?.currency,
+        },
+        'fx': intent.fx == null
+            ? null
+            : {
+                'pair': {
+                  'base': intent.fx?.pair?.base,
+                  'quote': intent.fx?.pair?.quote,
+                },
+                'side': intent.fx?.side.toString(),
+              },
+        'settlementMode': intent.settlementMode.toString(),
+        'customer': intent.customer?.id,
+      });
+    }
+  }
+
+  void reset() {
+    _reset();
   }
 }

frontend/pweb/caddy/Caddyfile

@@ -39,7 +39,7 @@
     @monetixSuccess {
       path /gateway/m/success*
       method POST
-      remote_ip 88.218.112.16 88.218.112.16/32 88.218.113.16 88.218.113.16/32 93.179.90.141 93.179.90.128/25 93.179.90.161 93.179.91.0/24 178.57.67.47 178.57.66.128/25 178.57.67.154 178.57.67.0/24 178.57.68.244
+      # remote_ip 88.218.112.16 88.218.112.16/32 88.218.113.16 88.218.113.16/32 93.179.90.141 93.179.90.128/25 93.179.90.161 93.179.91.0/24 178.57.67.47 178.57.66.128/25 178.57.67.154 178.57.67.0/24 178.57.68.244
     }
     handle @monetixSuccess {
       rewrite * /monetix/callback
@@ -50,7 +50,7 @@
     @monetixFail {
       path /gateway/m/fail*
       method POST
-      remote_ip 88.218.112.16 88.218.112.16/32 88.218.113.16 88.218.113.16/32 93.179.90.141 93.179.90.128/25 93.179.90.161 93.179.91.0/24 178.57.67.47 178.57.66.128/25 178.57.67.154 178.57.67.0/24 178.57.68.244
+      # remote_ip 88.218.112.16 88.218.112.16/32 88.218.113.16 88.218.113.16/32 93.179.90.141 93.179.90.128/25 93.179.90.161 93.179.91.0/24 178.57.67.47 178.57.66.128/25 178.57.67.154 178.57.67.0/24 178.57.68.244
     }
     handle @monetixFail {
       rewrite * /monetix/callback

frontend/pweb/lib/l10n/en.arb

@@ -383,6 +383,19 @@
   "payout": "Payout",
   "sendTo": "Send Payout To",
   "send": "Send Payout",
+  "quoteUnavailable": "Waiting for a quote...",
+  "quoteUpdating": "Refreshing quote...",
+  "quoteExpiresIn": "Quote expires in {time}",
+  "@quoteExpiresIn": {
+    "placeholders": {
+      "time": {
+        "type": "String"
+      }
+    }
+  },
+  "quoteExpired": "Quote expired, request a new one",
+  "quoteAutoRefresh": "Auto-refresh quote",
+  "quoteErrorGeneric": "Could not refresh quote, try again later",
   "recipientPaysFee": "Recipient pays the fee",
 
   "sentAmount": "Sent amount: {amount}",

frontend/pweb/lib/l10n/ru.arb

@@ -383,6 +383,19 @@
   "payout": "Выплата",
   "sendTo": "Отправить выплату",
   "send": "Отправить выплату",
+  "quoteUnavailable": "Ожидание котировки...",
+  "quoteUpdating": "Обновляем котировку...",
+  "quoteExpiresIn": "Котировка истекает через {time}",
+  "@quoteExpiresIn": {
+    "placeholders": {
+      "time": {
+        "type": "String"
+      }
+    }
+  },
+  "quoteExpired": "Срок котировки истек, запросите новую",
+  "quoteAutoRefresh": "Автообновление котировки",
+  "quoteErrorGeneric": "Не удалось обновить котировку, повторите позже",
   "recipientPaysFee": "Получатель оплачивает комиссию",
 
   "sentAmount": "Отправленная сумма: {amount}",

frontend/pweb/lib/models/button_state.dart

@@ -0,0 +1 @@
+enum ButtonState { enabled, disabled, loading }

frontend/pweb/lib/pages/dashboard/payouts/amount.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 import 'package:pshared/provider/payment/amount.dart';
+import 'package:pshared/provider/payment/quotation.dart';
 import 'package:pshared/utils/currency.dart';
 
 import 'package:pweb/generated/i18n/app_localizations.dart';
@@ -17,6 +18,7 @@ class PaymentAmountWidget extends StatefulWidget {
 
 class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
   late final TextEditingController _controller;
+  late final FocusNode _focusNode;
   bool _isSyncingText = false;
 
   @override
@@ -24,10 +26,14 @@ class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
     super.initState();
     final initialAmount = context.read<PaymentAmountProvider>().amount;
     _controller = TextEditingController(text: amountToString(initialAmount));
+    _focusNode = FocusNode()..addListener(_handleFocusChange);
   }
 
   @override
   void dispose() {
+    _focusNode.removeListener(_handleFocusChange);
+    _focusNode.dispose();
+    context.read<PaymentAmountProvider>().setEditing(false);
     _controller.dispose();
     super.dispose();
   }
@@ -56,6 +62,16 @@ class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
     }
   }
 
+  void _handleFocusChange() {
+    final amountProvider = context.read<PaymentAmountProvider>();
+    if (_focusNode.hasFocus) {
+      amountProvider.setEditing(true);
+      return;
+    }
+
+    amountProvider.setEditing(false);
+  }
+
   @override
   Widget build(BuildContext context) {
     final amount = context.select<PaymentAmountProvider, double>((provider) => provider.amount);
@@ -63,12 +79,14 @@ class _PaymentAmountWidgetState extends State<PaymentAmountWidget> {
 
     return TextField(
       controller: _controller,
+      focusNode: _focusNode,
       keyboardType: const TextInputType.numberWithOptions(decimal: true),
       decoration: InputDecoration(
         labelText: AppLocalizations.of(context)!.amount,
         border: const OutlineInputBorder(),
       ),
       onChanged: _onChanged,
+      onEditingComplete: () => _focusNode.unfocus(),
     );
   }
 }

frontend/pweb/lib/pages/payment_methods/page.dart

@@ -6,6 +6,7 @@ import 'package:pshared/models/payment/type.dart';
 import 'package:pshared/models/recipient/recipient.dart';
 import 'package:pshared/provider/payment/flow.dart';
 import 'package:pshared/provider/payment/provider.dart';
+import 'package:pshared/provider/payment/quotation.dart';
 import 'package:pshared/provider/recipient/pmethods.dart';
 import 'package:pshared/provider/recipient/provider.dart';
 import 'package:pshared/provider/payment/wallets.dart';
@@ -81,8 +82,16 @@ class _PaymentPageState extends State<PaymentPage> {
   void _handleSendPayment() {
     final flowProvider = context.read<PaymentFlowProvider>();
     final paymentProvider = context.read<PaymentProvider>();
+    final quotationProvider = context.read<QuotationProvider>();
     if (paymentProvider.isLoading) return;
 
+    if (!quotationProvider.hasLiveQuote) {
+      if (quotationProvider.canRequestQuote) {
+        quotationProvider.refreshNow();
+      }
+      return;
+    }
+
     paymentProvider.pay().then((_) {
       PosthogService.paymentInitiated(method: flowProvider.selectedType);
     }).catchError((error) {

frontend/pweb/lib/pages/payment_methods/payment_page/page.dart

@@ -3,11 +3,12 @@ import 'package:flutter/material.dart';
 import 'package:pshared/models/payment/wallet.dart';
 import 'package:pshared/models/recipient/recipient.dart';
 import 'package:pshared/provider/recipient/provider.dart';
-import 'package:pweb/pages/dashboard/payouts/form.dart';
 
+import 'package:pweb/pages/dashboard/payouts/form.dart';
 import 'package:pweb/pages/payment_methods/payment_page/back_button.dart';
 import 'package:pweb/pages/payment_methods/payment_page/header.dart';
 import 'package:pweb/pages/payment_methods/payment_page/method_selector.dart';
+import 'package:pweb/pages/payment_methods/payment_page/quote/quote_status.dart';
 import 'package:pweb/pages/payment_methods/payment_page/send_button.dart';
 import 'package:pweb/pages/payment_methods/widgets/payment_info_section.dart';
 import 'package:pweb/pages/payment_methods/widgets/recipient_section.dart';
@@ -94,7 +95,9 @@ class PaymentPageContent extends StatelessWidget {
                   PaymentInfoSection(dimensions: dimensions),
                   SizedBox(height: dimensions.paddingLarge),
                   const PaymentFormWidget(),
-                  SizedBox(height: dimensions.paddingXXXLarge),
+                  SizedBox(height: dimensions.paddingLarge),
+                  const QuoteStatus(),
+                  SizedBox(height: dimensions.paddingXXLarge),
                   SendButton(onPressed: onSend),
                   SizedBox(height: dimensions.paddingLarge),
                 ],

frontend/pweb/lib/pages/payment_methods/payment_page/quote/actions.dart

@@ -0,0 +1,54 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/utils/dimensions.dart';
+
+
+class QuoteStatusActions extends StatelessWidget {
+  final bool isLoading;
+  final bool canRefresh;
+  final bool autoRefreshEnabled;
+  final ValueChanged<bool>? onToggleAutoRefresh;
+  final VoidCallback? onRefresh;
+  final String autoRefreshLabel;
+  final String refreshLabel;
+  final AppDimensions dimensions;
+  final TextTheme theme;
+
+  const QuoteStatusActions({
+    super.key,
+    required this.isLoading,
+    required this.canRefresh,
+    required this.autoRefreshEnabled,
+    required this.onToggleAutoRefresh,
+    required this.onRefresh,
+    required this.autoRefreshLabel,
+    required this.refreshLabel,
+    required this.dimensions,
+    required this.theme,
+  });
+
+  @override
+  Widget build(BuildContext context) => Row(
+        children: [
+          Expanded(
+            child: SwitchListTile.adaptive(
+              contentPadding: EdgeInsets.zero,
+              value: autoRefreshEnabled,
+              title: Text(autoRefreshLabel, style: theme.bodyMedium),
+              onChanged: onToggleAutoRefresh,
+            ),
+          ),
+          TextButton.icon(
+            onPressed: canRefresh ? onRefresh : null,
+            icon: isLoading
+                ? SizedBox(
+                    width: 16,
+                    height: 16,
+                    child: CircularProgressIndicator(strokeWidth: 2),
+                  )
+                : const Icon(Icons.refresh),
+            label: Text(refreshLabel),
+          ),
+        ],
+      );
+}

frontend/pweb/lib/pages/payment_methods/payment_page/quote/message.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/utils/dimensions.dart';
+
+
+class QuoteStatusMessage extends StatelessWidget {
+  final String statusText;
+  final String? errorText;
+  final bool showDetails;
+  final VoidCallback onToggleDetails;
+  final AppDimensions dimensions;
+  final TextTheme theme;
+  final String showLabel;
+  final String hideLabel;
+
+  const QuoteStatusMessage({
+    super.key,
+    required this.statusText,
+    required this.errorText,
+    required this.showDetails,
+    required this.onToggleDetails,
+    required this.dimensions,
+    required this.theme,
+    required this.showLabel,
+    required this.hideLabel,
+  });
+
+  @override
+  Widget build(BuildContext context) => Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text(statusText, style: theme.bodyMedium),
+          if (errorText != null) ...[
+            SizedBox(height: dimensions.paddingSmall),
+            TextButton(
+              onPressed: onToggleDetails,
+              child: Text(showDetails ? hideLabel : showLabel),
+            ),
+            if (showDetails) ...[
+              SizedBox(height: dimensions.paddingSmall),
+              Text(
+                errorText!,
+                style: theme.bodySmall,
+              ),
+            ],
+          ],
+        ],
+      );
+}

frontend/pweb/lib/pages/payment_methods/payment_page/quote/quote_status.dart

@@ -0,0 +1,115 @@
+import 'package:flutter/material.dart';
+
+import 'package:provider/provider.dart';
+
+import 'package:pshared/provider/payment/quotation.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+import 'package:pweb/pages/payment_methods/payment_page/quote/actions.dart';
+import 'package:pweb/pages/payment_methods/payment_page/quote/message.dart';
+import 'package:pweb/utils/dimensions.dart';
+
+
+class QuoteStatus extends StatefulWidget {
+  const QuoteStatus({super.key});
+
+  @override
+  State<QuoteStatus> createState() => _QuoteStatusState();
+}
+
+class _QuoteStatusState extends State<QuoteStatus> {
+  bool _showDetails = false;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final dimensions = AppDimensions();
+    final loc = AppLocalizations.of(context)!;
+
+    return Consumer<QuotationProvider>(
+      builder: (context, provider, _) {
+        final statusText = _statusText(provider, loc);
+        final canRefresh = provider.canRequestQuote && !provider.isLoading;
+        final refreshLabel = provider.isLoading ? loc.quoteUpdating : loc.retry;
+        final error = provider.error;
+        final backgroundColor = theme.colorScheme.surfaceContainerHighest.withValues(alpha: 0.3);
+
+        return Container(
+          width: double.infinity,
+          padding: EdgeInsets.all(dimensions.paddingMedium),
+          decoration: BoxDecoration(
+            color: backgroundColor,
+            borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
+          ),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              QuoteStatusMessage(
+                statusText: statusText,
+                errorText: error?.toString(),
+                showDetails: _showDetails,
+                onToggleDetails: () => setState(() => _showDetails = !_showDetails),
+                dimensions: dimensions,
+                theme: theme.textTheme,
+                showLabel: loc.showDetails,
+                hideLabel: loc.hideDetails,
+              ),
+              SizedBox(height: dimensions.paddingSmall),
+              QuoteStatusActions(
+                isLoading: provider.isLoading,
+                canRefresh: canRefresh,
+                autoRefreshEnabled: provider.autoRefreshEnabled,
+                onToggleAutoRefresh: provider.canRequestQuote
+                    ? (value) => context.read<QuotationProvider>().setAutoRefresh(value)
+                    : null,
+                onRefresh: canRefresh ? () => context.read<QuotationProvider>().refreshNow() : null,
+                autoRefreshLabel: loc.quoteAutoRefresh,
+                refreshLabel: refreshLabel,
+                dimensions: dimensions,
+                theme: theme.textTheme,
+              ),
+            ],
+          ),
+        );
+      },
+    );
+  }
+
+  String _statusText(QuotationProvider provider, AppLocalizations loc) {
+    if (provider.error != null) {
+      return loc.quoteErrorGeneric;
+    }
+
+    if (!provider.canRequestQuote) {
+      return loc.quoteUnavailable;
+    }
+
+    if (provider.isLoading) {
+      return loc.quoteUpdating;
+    }
+
+    if (provider.hasLiveQuote) {
+      final remaining = provider.timeToExpire;
+      if (remaining != null) {
+        return loc.quoteExpiresIn(_formatDuration(remaining));
+      }
+    }
+
+    if (provider.hasQuoteForCurrentIntent) {
+      return loc.quoteExpired;
+    }
+
+    return loc.quoteUnavailable;
+  }
+
+  String _formatDuration(Duration duration) {
+    final minutes = duration.inMinutes;
+    final seconds = duration.inSeconds.remainder(60).toString().padLeft(2, '0');
+    if (duration.inHours > 0) {
+      final hours = duration.inHours;
+      final mins = minutes.remainder(60).toString().padLeft(2, '0');
+      return '$hours:$mins:$seconds';
+    }
+    return '$minutes:$seconds';
+  }
+}

frontend/pweb/lib/pages/payment_methods/payment_page/send_button.dart

@@ -1,44 +1,76 @@
 import 'package:flutter/material.dart';
 
+import 'package:provider/provider.dart';
+
+import 'package:pshared/provider/payment/provider.dart';
+import 'package:pshared/provider/payment/quotation.dart';
+
+import 'package:pweb/models/button_state.dart';
 import 'package:pweb/utils/dimensions.dart';
 
 import 'package:pweb/generated/i18n/app_localizations.dart';
 
 
 class SendButton extends StatelessWidget {
-  final VoidCallback onPressed;
+  final VoidCallback? onPressed;
 
-  const SendButton({super.key, required this.onPressed});
+  const SendButton({
+    super.key,
+    required this.onPressed,
+  });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context) => Consumer2<QuotationProvider, PaymentProvider>(
-    final theme = Theme.of(context);
+        builder: (context, quotation, payment, _) {
-    final dimensions = AppDimensions();
+          final theme = Theme.of(context);
+          final dimensions = AppDimensions();
 
-    return Center(
+          final canSend = quotation.hasLiveQuote && !payment.isLoading;
-      child: SizedBox(
+          final state = payment.isLoading
-        width: dimensions.buttonWidth,
+              ? ButtonState.loading
-        height: dimensions.buttonHeight,
+              : (canSend ? ButtonState.enabled : ButtonState.disabled);
-        child: InkWell(
+          final isLoading = state == ButtonState.loading;
-          borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
+          final isActive = state == ButtonState.enabled && onPressed != null;
-          onTap: onPressed,
+
-          child: Container(
+          final backgroundColor = isActive
-            decoration: BoxDecoration(
+              ? theme.colorScheme.primary
-              color: theme.colorScheme.primary,
+              : theme.colorScheme.primary.withValues(alpha: 0.5);
-              borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
+          final textColor = theme.colorScheme.onSecondary.withValues(alpha: isActive ? 1 : 0.7);
-            ),
+
-            child: Center(
+          return Center(
-              child: Text(
+            child: SizedBox(
-                AppLocalizations.of(context)!.send,
+              width: dimensions.buttonWidth,
-                style: theme.textTheme.bodyLarge?.copyWith(
+              height: dimensions.buttonHeight,
-                  color: theme.colorScheme.onSecondary,
+              child: InkWell(
-                  fontWeight: FontWeight.w600,
+                borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
+                onTap: isActive ? onPressed : null,
+                child: Container(
+                  decoration: BoxDecoration(
+                    color: backgroundColor,
+                    borderRadius: BorderRadius.circular(dimensions.borderRadiusSmall),
+                  ),
+                  child: Center(
+                    child: isLoading
+                        ? SizedBox(
+                            height: dimensions.iconSizeSmall,
+                            width: dimensions.iconSizeSmall,
+                            child: CircularProgressIndicator(
+                              strokeWidth: 2,
+                              valueColor: AlwaysStoppedAnimation<Color>(textColor),
+                            ),
+                          )
+                        : Text(
+                            AppLocalizations.of(context)!.send,
+                            style: theme.textTheme.bodyLarge?.copyWith(
+                              color: textColor,
+                              fontWeight: FontWeight.w600,
+                            ),
+                          ),
+                  ),
                 ),
               ),
             ),
-          ),
+          );
-        ),
+        },
-      ),
+      );
-    );
+}
-  }
-}

frontend/pweb/lib/providers/mock_payment.dart

@@ -0,0 +1,24 @@
+import 'package:flutter/material.dart';
+
+
+class MockPaymentProvider with ChangeNotifier {
+  double _amount = 10.0;
+  bool _payerCoversFee = true;
+
+  double get amount => _amount;
+  bool get payerCoversFee => _payerCoversFee;
+
+  double get fee => _amount * 0.05;
+  double get total => payerCoversFee ? (_amount + fee) : _amount;
+  double get recipientGets => payerCoversFee ? _amount : (_amount - fee);
+
+  void setAmount(double value) {
+    _amount = value;
+    notifyListeners();
+  }
+
+  void setPayerCoversFee(bool value) {
+    _payerCoversFee = value;
+    notifyListeners();
+  }
+}

frontend/pweb/lib/utils/payment/dropdown.dart

@@ -23,7 +23,7 @@ class PaymentMethodDropdown extends StatelessWidget {
   @override
   Widget build(BuildContext context) => DropdownButtonFormField<Wallet>(
     dropdownColor: Theme.of(context).colorScheme.onSecondary,
-    value: _getSelectedMethod(),
+    initialValue: _getSelectedMethod(),
     decoration: InputDecoration(
       labelText: AppLocalizations.of(context)!.whereGetMoney,
       border: OutlineInputBorder(borderRadius: BorderRadius.circular(8)),