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feat: implement swap logic (sats <-> USD) with bidirectional input, fee preview, and mint validation

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This commit is contained in:
Forte11Cuba
2026-04-10 02:57:55 -06:00
parent 42bab5d18a
commit d2035ba416
26 changed files with 978 additions and 160 deletions
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lib/core/services/price_service.dart
+4 -1
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@@ -115,7 +115,10 @@ class PriceService {
final data = json['data'] as Map<String, dynamic>?;
if (data == null) throw Exception('No data in response');
final list = data['btcPriceList'] as List? ?? [];
final list = data['btcPriceList'] as List?;
if (list == null || list.isEmpty) {
throw Exception('No historical prices in response');
}
return list.map((point) {
final price = point['price'] as Map<String, dynamic>;
lib/l10n/app_de.arb
+7 -1
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@@ -567,5 +567,11 @@
"swapTo": "Nach",
"swapAction": "Tauschen",
"swapEstimatedFee": "Geschätzte Gebühr",
"swapUseAll": "Alles verwenden"
"swapUseAll": "Alles verwenden",
"swapMinimum": "Minimum: {amount}",
"swapProcessing": "Swap wird verarbeitet...",
"swapSuccess": "Swap abgeschlossen",
"swapErrorInsufficient": "Unzureichendes Guthaben",
"swapErrorExpired": "Angebot abgelaufen",
"swapErrorGeneric": "Swap-Fehler: {error}"
}
lib/l10n/app_en.arb
+7 -1
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@@ -460,5 +460,11 @@
"swapTo": "To",
"swapAction": "Swap",
"swapEstimatedFee": "Estimated fee",
"swapUseAll": "Use all"
"swapUseAll": "Use all",
"swapMinimum": "Minimum: {amount}",
"swapProcessing": "Processing swap...",
"swapSuccess": "Swap completed",
"swapErrorInsufficient": "Insufficient balance",
"swapErrorExpired": "Quote has expired",
"swapErrorGeneric": "Swap error: {error}"
}
lib/l10n/app_es.arb
+17 -1
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@@ -580,5 +580,21 @@
"swapTo": "A",
"swapAction": "Cambiar",
"swapEstimatedFee": "Fee estimado",
"swapUseAll": "Usar todo"
"swapUseAll": "Usar todo",
"swapMinimum": "Mínimo: {amount}",
"@swapMinimum": {
"placeholders": {
"amount": { "type": "String" }
}
},
"swapProcessing": "Procesando swap...",
"swapSuccess": "Swap completado",
"swapErrorInsufficient": "Saldo insuficiente",
"swapErrorExpired": "La cotización ha expirado",
"swapErrorGeneric": "Error en el swap: {error}",
"@swapErrorGeneric": {
"placeholders": {
"error": { "type": "String" }
}
}
}
lib/l10n/app_fr.arb
+7 -1
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@@ -567,5 +567,11 @@
"swapTo": "Vers",
"swapAction": "Échanger",
"swapEstimatedFee": "Frais estimés",
"swapUseAll": "Tout utiliser"
"swapUseAll": "Tout utiliser",
"swapMinimum": "Minimum : {amount}",
"swapProcessing": "Swap en cours...",
"swapSuccess": "Swap terminé",
"swapErrorInsufficient": "Solde insuffisant",
"swapErrorExpired": "Le devis a expiré",
"swapErrorGeneric": "Erreur de swap : {error}"
}
lib/l10n/app_it.arb
+7 -1
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@@ -567,5 +567,11 @@
"swapTo": "A",
"swapAction": "Scambia",
"swapEstimatedFee": "Commissione stimata",
"swapUseAll": "Usa tutto"
"swapUseAll": "Usa tutto",
"swapMinimum": "Minimo: {amount}",
"swapProcessing": "Swap in corso...",
"swapSuccess": "Swap completato",
"swapErrorInsufficient": "Saldo insufficiente",
"swapErrorExpired": "Il preventivo è scaduto",
"swapErrorGeneric": "Errore swap: {error}"
}
lib/l10n/app_ja.arb
+7 -1
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@@ -567,5 +567,11 @@
"swapTo": "送信先",
"swapAction": "交換",
"swapEstimatedFee": "推定手数料",
"swapUseAll": "全額使用"
"swapUseAll": "全額使用",
"swapMinimum": "最小: {amount}",
"swapProcessing": "スワップ処理中...",
"swapSuccess": "スワップ完了",
"swapErrorInsufficient": "残高不足",
"swapErrorExpired": "見積もりの有効期限切れ",
"swapErrorGeneric": "スワップエラー: {error}"
}
lib/l10n/app_ko.arb
+9 -3
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@@ -563,9 +563,15 @@
"swap": "교환",
"swapDescription": "Sats와 USD 간 변환",
"swapFrom": "보내기",
"swapTo": "받기",
"swapFrom": "에서",
"swapTo": "으로",
"swapAction": "교환",
"swapEstimatedFee": "예상 수수료",
"swapUseAll": "전액 사용"
"swapUseAll": "전액 사용",
"swapMinimum": "최소: {amount}",
"swapProcessing": "교환 처리 중...",
"swapSuccess": "교환 완료",
"swapErrorInsufficient": "잔액 부족",
"swapErrorExpired": "견적이 만료되었습니다",
"swapErrorGeneric": "교환 오류: {error}"
}
lib/l10n/app_localizations.dart
+36
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@@ -2394,6 +2394,42 @@ abstract class L10n {
/// In es, this message translates to:
/// **'Usar todo'**
String get swapUseAll;
/// No description provided for @swapMinimum.
///
/// In es, this message translates to:
/// **'Mínimo: {amount}'**
String swapMinimum(String amount);
/// No description provided for @swapProcessing.
///
/// In es, this message translates to:
/// **'Procesando swap...'**
String get swapProcessing;
/// No description provided for @swapSuccess.
///
/// In es, this message translates to:
/// **'Swap completado'**
String get swapSuccess;
/// No description provided for @swapErrorInsufficient.
///
/// In es, this message translates to:
/// **'Saldo insuficiente'**
String get swapErrorInsufficient;
/// No description provided for @swapErrorExpired.
///
/// In es, this message translates to:
/// **'La cotización ha expirado'**
String get swapErrorExpired;
/// No description provided for @swapErrorGeneric.
///
/// In es, this message translates to:
/// **'Error en el swap: {error}'**
String swapErrorGeneric(String error);
}
class _L10nDelegate extends LocalizationsDelegate<L10n> {
lib/l10n/app_localizations_de.dart
+22
View File
@@ -1262,4 +1262,26 @@ class L10nDe extends L10n {
@override
String get swapUseAll => 'Alles verwenden';
@override
String swapMinimum(String amount) {
return 'Minimum: $amount';
}
@override
String get swapProcessing => 'Swap wird verarbeitet...';
@override
String get swapSuccess => 'Swap abgeschlossen';
@override
String get swapErrorInsufficient => 'Unzureichendes Guthaben';
@override
String get swapErrorExpired => 'Angebot abgelaufen';
@override
String swapErrorGeneric(String error) {
return 'Swap-Fehler: $error';
}
}
lib/l10n/app_localizations_en.dart
+22
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@@ -1243,4 +1243,26 @@ class L10nEn extends L10n {
@override
String get swapUseAll => 'Use all';
@override
String swapMinimum(String amount) {
return 'Minimum: $amount';
}
@override
String get swapProcessing => 'Processing swap...';
@override
String get swapSuccess => 'Swap completed';
@override
String get swapErrorInsufficient => 'Insufficient balance';
@override
String get swapErrorExpired => 'Quote has expired';
@override
String swapErrorGeneric(String error) {
return 'Swap error: $error';
}
}
lib/l10n/app_localizations_es.dart
+22
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@@ -1251,4 +1251,26 @@ class L10nEs extends L10n {
@override
String get swapUseAll => 'Usar todo';
@override
String swapMinimum(String amount) {
return 'Mínimo: $amount';
}
@override
String get swapProcessing => 'Procesando swap...';
@override
String get swapSuccess => 'Swap completado';
@override
String get swapErrorInsufficient => 'Saldo insuficiente';
@override
String get swapErrorExpired => 'La cotización ha expirado';
@override
String swapErrorGeneric(String error) {
return 'Error en el swap: $error';
}
}
lib/l10n/app_localizations_fr.dart
+22
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@@ -1267,4 +1267,26 @@ class L10nFr extends L10n {
@override
String get swapUseAll => 'Tout utiliser';
@override
String swapMinimum(String amount) {
return 'Minimum : $amount';
}
@override
String get swapProcessing => 'Swap en cours...';
@override
String get swapSuccess => 'Swap terminé';
@override
String get swapErrorInsufficient => 'Solde insuffisant';
@override
String get swapErrorExpired => 'Le devis a expiré';
@override
String swapErrorGeneric(String error) {
return 'Erreur de swap : $error';
}
}
lib/l10n/app_localizations_it.dart
+22
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@@ -1255,4 +1255,26 @@ class L10nIt extends L10n {
@override
String get swapUseAll => 'Usa tutto';
@override
String swapMinimum(String amount) {
return 'Minimo: $amount';
}
@override
String get swapProcessing => 'Swap in corso...';
@override
String get swapSuccess => 'Swap completato';
@override
String get swapErrorInsufficient => 'Saldo insufficiente';
@override
String get swapErrorExpired => 'Il preventivo è scaduto';
@override
String swapErrorGeneric(String error) {
return 'Errore swap: $error';
}
}
lib/l10n/app_localizations_ja.dart
+22
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@@ -1228,4 +1228,26 @@ class L10nJa extends L10n {
@override
String get swapUseAll => '全額使用';
@override
String swapMinimum(String amount) {
return '最小: $amount';
}
@override
String get swapProcessing => 'スワップ処理中...';
@override
String get swapSuccess => 'スワップ完了';
@override
String get swapErrorInsufficient => '残高不足';
@override
String get swapErrorExpired => '見積もりの有効期限切れ';
@override
String swapErrorGeneric(String error) {
return 'スワップエラー: $error';
}
}
lib/l10n/app_localizations_ko.dart
+24 -2
View File
@@ -1217,10 +1217,10 @@ class L10nKo extends L10n {
String get swapDescription => 'Sats와 USD 간 변환';
@override
String get swapFrom => '보내기';
String get swapFrom => '에서';
@override
String get swapTo => '받기';
String get swapTo => '으로';
@override
String get swapAction => '교환';
@@ -1230,4 +1230,26 @@ class L10nKo extends L10n {
@override
String get swapUseAll => '전액 사용';
@override
String swapMinimum(String amount) {
return '최소: $amount';
}
@override
String get swapProcessing => '교환 처리 중...';
@override
String get swapSuccess => '교환 완료';
@override
String get swapErrorInsufficient => '잔액 부족';
@override
String get swapErrorExpired => '견적이 만료되었습니다';
@override
String swapErrorGeneric(String error) {
return '교환 오류: $error';
}
}
lib/l10n/app_localizations_pt.dart
+22
View File
@@ -1255,4 +1255,26 @@ class L10nPt extends L10n {
@override
String get swapUseAll => 'Usar tudo';
@override
String swapMinimum(String amount) {
return 'Mínimo: $amount';
}
@override
String get swapProcessing => 'Processando swap...';
@override
String get swapSuccess => 'Swap concluído';
@override
String get swapErrorInsufficient => 'Saldo insuficiente';
@override
String get swapErrorExpired => 'A cotação expirou';
@override
String swapErrorGeneric(String error) {
return 'Erro no swap: $error';
}
}
lib/l10n/app_localizations_ru.dart
+22
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@@ -1251,4 +1251,26 @@ class L10nRu extends L10n {
@override
String get swapUseAll => 'Использовать всё';
@override
String swapMinimum(String amount) {
return 'Минимум: $amount';
}
@override
String get swapProcessing => 'Обработка обмена...';
@override
String get swapSuccess => 'Обмен завершён';
@override
String get swapErrorInsufficient => 'Недостаточный баланс';
@override
String get swapErrorExpired => 'Котировка истекла';
@override
String swapErrorGeneric(String error) {
return 'Ошибка обмена: $error';
}
}
lib/l10n/app_localizations_sw.dart
+22
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@@ -1252,4 +1252,26 @@ class L10nSw extends L10n {
@override
String get swapUseAll => 'Tumia yote';
@override
String swapMinimum(String amount) {
return 'Kiwango cha chini: $amount';
}
@override
String get swapProcessing => 'Inashughulikia ubadilishaji...';
@override
String get swapSuccess => 'Ubadilishaji umekamilika';
@override
String get swapErrorInsufficient => 'Salio haitoshi';
@override
String get swapErrorExpired => 'Bei imeisha muda';
@override
String swapErrorGeneric(String error) {
return 'Kosa la ubadilishaji: $error';
}
}
lib/l10n/app_localizations_zh.dart
+22
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@@ -1223,4 +1223,26 @@ class L10nZh extends L10n {
@override
String get swapUseAll => '全部使用';
@override
String swapMinimum(String amount) {
return '最低: $amount';
}
@override
String get swapProcessing => '兑换处理中...';
@override
String get swapSuccess => '兑换完成';
@override
String get swapErrorInsufficient => '余额不足';
@override
String get swapErrorExpired => '报价已过期';
@override
String swapErrorGeneric(String error) {
return '兑换错误: $error';
}
}
lib/l10n/app_pt.arb
+7 -1
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@@ -567,5 +567,11 @@
"swapTo": "Para",
"swapAction": "Trocar",
"swapEstimatedFee": "Taxa estimada",
"swapUseAll": "Usar tudo"
"swapUseAll": "Usar tudo",
"swapMinimum": "Mínimo: {amount}",
"swapProcessing": "Processando swap...",
"swapSuccess": "Swap concluído",
"swapErrorInsufficient": "Saldo insuficiente",
"swapErrorExpired": "A cotação expirou",
"swapErrorGeneric": "Erro no swap: {error}"
}
lib/l10n/app_ru.arb
+7 -1
View File
@@ -567,5 +567,11 @@
"swapTo": "В",
"swapAction": "Обменять",
"swapEstimatedFee": "Ориентировочная комиссия",
"swapUseAll": "Использовать всё"
"swapUseAll": "Использовать всё",
"swapMinimum": "Минимум: {amount}",
"swapProcessing": "Обработка обмена...",
"swapSuccess": "Обмен завершён",
"swapErrorInsufficient": "Недостаточный баланс",
"swapErrorExpired": "Котировка истекла",
"swapErrorGeneric": "Ошибка обмена: {error}"
}
lib/l10n/app_sw.arb
+7 -1
View File
@@ -567,5 +567,11 @@
"swapTo": "Kwenda",
"swapAction": "Badilisha",
"swapEstimatedFee": "Ada inayokadiriwa",
"swapUseAll": "Tumia yote"
"swapUseAll": "Tumia yote",
"swapMinimum": "Kiwango cha chini: {amount}",
"swapProcessing": "Inashughulikia ubadilishaji...",
"swapSuccess": "Ubadilishaji umekamilika",
"swapErrorInsufficient": "Salio haitoshi",
"swapErrorExpired": "Bei imeisha muda",
"swapErrorGeneric": "Kosa la ubadilishaji: {error}"
}
lib/l10n/app_zh.arb
+7 -1
View File
@@ -567,5 +567,11 @@
"swapTo": "到",
"swapAction": "兑换",
"swapEstimatedFee": "预估手续费",
"swapUseAll": "全部使用"
"swapUseAll": "全部使用",
"swapMinimum": "最低: {amount}",
"swapProcessing": "兑换处理中...",
"swapSuccess": "兑换完成",
"swapErrorInsufficient": "余额不足",
"swapErrorExpired": "报价已过期",
"swapErrorGeneric": "兑换错误: {error}"
}
lib/providers/wallet_provider.dart
+47
View File
@@ -1537,6 +1537,53 @@ class WalletProvider extends ChangeNotifier {
}
}
/// Guarda metadata para el lado melt (enviado) de un swap.
/// Busca la tx outgoing más reciente que coincida con el monto.
Future<void> saveSwapMeltMetadata(Wallet wallet, String invoice, BigInt amount) async {
try {
final txs = await wallet.listTransactions(
direction: TransactionDirection.outgoing,
);
final tx = txs.cast<Transaction?>().firstWhere(
(t) => t!.amount == amount && !_txMetaStorage.has(t.id),
orElse: () => txs.isNotEmpty ? txs.first : null,
);
if (tx != null) {
await _txMetaStorage.save(
tx.id,
TransactionMeta(type: TransactionType.lightning, invoice: invoice),
);
debugPrint('Swap melt metadata guardada para tx ${tx.id}');
}
} catch (e) {
debugPrint('Error guardando swap melt metadata: $e');
}
notifyListeners();
}
/// Guarda metadata para el lado mint (recibido) de un swap.
/// Busca la tx incoming más reciente que coincida con el monto.
Future<void> saveSwapMintMetadata(Wallet wallet, String invoice, BigInt amount) async {
try {
final txs = await wallet.listTransactions(
direction: TransactionDirection.incoming,
);
final tx = txs.cast<Transaction?>().firstWhere(
(t) => t!.amount == amount && !_txMetaStorage.has(t.id),
orElse: () => txs.isNotEmpty ? txs.first : null,
);
if (tx != null) {
await _txMetaStorage.save(
tx.id,
TransactionMeta(type: TransactionType.lightning, invoice: invoice),
);
debugPrint('Swap mint metadata guardada para tx ${tx.id}');
}
} catch (e) {
debugPrint('Error guardando swap mint metadata: $e');
}
}
// ============================================================
// HISTORIAL
// ============================================================
lib/screens/13_swap/swap_screen.dart
+558 -144
View File
@@ -1,3 +1,4 @@
import 'dart:async';
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
@@ -9,6 +10,7 @@ import '../../core/constants/colors.dart';
import '../../core/constants/dimensions.dart';
import '../../core/utils/formatters.dart';
import '../../core/services/price_service.dart';
import '../../src/rust/api/wallet.dart';
import '../../widgets/common/gradient_background.dart';
import '../../widgets/common/glass_card.dart';
import '../../widgets/common/primary_button.dart';
@@ -26,8 +28,13 @@ class _SwapScreenState extends State<SwapScreen>
with SingleTickerProviderStateMixin {
// true = sats → usd, false = usd → sats
bool _isSatsToUsd = true;
final _amountController = TextEditingController();
String _convertedAmount = '';
final _fromController = TextEditingController();
final _toController = TextEditingController();
// Cuál campo se editó último: true = from, false = to
bool _lastEditedFrom = true;
// Evita loops infinitos entre listeners
bool _isUpdating = false;
late AnimationController _flipController;
late Animation<double> _flipAnimation;
@@ -38,6 +45,12 @@ class _SwapScreenState extends State<SwapScreen>
List<double> _chartData = [];
bool _isLoadingChart = true;
// --- Swap state ---
bool _isSwapping = false;
String? _swapError;
// Suscripciones locales (NO usa los globales del provider)
StreamSubscription<MintQuote>? _mintSubscription;
@override
void initState() {
super.initState();
@@ -48,7 +61,8 @@ class _SwapScreenState extends State<SwapScreen>
_flipAnimation = Tween<double>(begin: 0.0, end: 0.5).animate(
CurvedAnimation(parent: _flipController, curve: Curves.easeInOut),
);
_amountController.addListener(_calculateConversion);
_fromController.addListener(_onFromChanged);
_toController.addListener(_onToChanged);
WidgetsBinding.instance.addPostFrameCallback((_) {
_loadBalances();
_loadChartData();
@@ -57,7 +71,9 @@ class _SwapScreenState extends State<SwapScreen>
@override
void dispose() {
_amountController.dispose();
_mintSubscription?.cancel();
_fromController.dispose();
_toController.dispose();
_flipController.dispose();
super.dispose();
}
@@ -104,38 +120,58 @@ class _SwapScreenState extends State<SwapScreen>
});
}
void _calculateConversion() {
final text = _amountController.text;
void _onFromChanged() {
if (_isUpdating) return;
_lastEditedFrom = true;
_syncConversion(fromSource: true);
}
void _onToChanged() {
if (_isUpdating) return;
_lastEditedFrom = false;
_syncConversion(fromSource: false);
}
/// Calcula el campo opuesto basado en el campo editado
void _syncConversion({required bool fromSource}) {
final source = fromSource ? _fromController : _toController;
final target = fromSource ? _toController : _fromController;
final text = source.text;
if (text.isEmpty) {
setState(() => _convertedAmount = '');
_isUpdating = true;
target.text = '';
_isUpdating = false;
setState(() {});
return;
}
final priceProvider = context.read<PriceProvider>();
final btcPrice = priceProvider.btcPriceUsd;
if (btcPrice == null || btcPrice == 0) {
setState(() => _convertedAmount = '...');
return;
}
if (btcPrice == null || btcPrice == 0) return;
try {
if (_isSatsToUsd) {
// Determinar si el source es sats o usd
final sourceIsSats =
(fromSource && _isSatsToUsd) || (!fromSource && !_isSatsToUsd);
String result;
if (sourceIsSats) {
final sats = int.tryParse(text) ?? 0;
final usdAmount = sats / 100000000 * btcPrice;
setState(() {
_convertedAmount = usdAmount < 0.01 && usdAmount > 0
? '< \$0.01'
: '\$${usdAmount.toStringAsFixed(2)}';
});
final usd = sats / 100000000 * btcPrice;
result = usd == 0 ? '' : usd.toStringAsFixed(2);
} else {
final usd = double.tryParse(text) ?? 0;
final sats = (usd / btcPrice * 100000000).round();
setState(() {
_convertedAmount = '${NumberFormat('#,###').format(sats)} sat';
});
result = sats == 0 ? '' : sats.toString();
}
_isUpdating = true;
target.text = result;
_isUpdating = false;
setState(() {});
} catch (_) {
setState(() => _convertedAmount = '...');
// ignorar errores de parseo parcial
}
}
@@ -146,26 +182,403 @@ class _SwapScreenState extends State<SwapScreen>
} else {
_flipController.reverse();
}
// Intercambiar valores entre campos
final fromText = _fromController.text;
final toText = _toController.text;
_isUpdating = true;
setState(() {
_isSatsToUsd = !_isSatsToUsd;
_amountController.clear();
_convertedAmount = '';
_fromController.text = toText;
_toController.text = fromText;
_lastEditedFrom = !_lastEditedFrom;
});
}
void _setQuickAmount(String amount) {
_amountController.text = amount;
_amountController.selection = TextSelection.fromPosition(
TextPosition(offset: amount.length),
);
_isUpdating = false;
}
void _setMaxAmount() {
if (_isSatsToUsd) {
_setQuickAmount(_satsBalance.toString());
_fromController.text = _satsBalance.toString();
} else {
final usd = _usdBalance.toDouble() / 100;
_setQuickAmount(usd.toStringAsFixed(2));
_fromController.text = usd.toStringAsFixed(2);
}
_lastEditedFrom = true;
}
// --- Validación de mínimos del mint ---
static const double _minUsd = 0.01;
static const int _minSats = 1;
/// Valida que ambos lados cumplan los mínimos del mint.
/// Retorna null si es válido, o el mensaje de error si no.
String? _validateMinimums(L10n l10n) {
if (_fromController.text.isEmpty || _toController.text.isEmpty) return null;
final priceProvider = context.read<PriceProvider>();
final btcPrice = priceProvider.btcPriceUsd;
if (btcPrice == null || btcPrice == 0) return null;
if (_isSatsToUsd) {
// from=sats, to=usd → verificar que USD >= 0.01
final usd = double.tryParse(_toController.text) ?? 0;
if (usd < _minUsd) {
// Calcular mínimo de sats necesario
final minSatsNeeded = ((_minUsd / btcPrice) * 100000000).ceil();
return l10n.swapMinimum('$minSatsNeeded sats');
}
} else {
// from=usd, to=sats → verificar que sats >= 1 y USD >= 0.01
final usd = double.tryParse(_fromController.text) ?? 0;
final sats = int.tryParse(_toController.text) ?? 0;
if (usd < _minUsd) {
return l10n.swapMinimum('\$${_minUsd.toStringAsFixed(2)}');
}
if (sats < _minSats) {
return l10n.swapMinimum('$_minSats sat');
}
}
return null;
}
// --- Swap logic ---
/// Determina el monto destino en BigInt (centavos para USD, sats para sat).
BigInt _getDestAmount() {
final destText = _isSatsToUsd ? _toController.text : _toController.text;
final destUnit = _isSatsToUsd ? 'usd' : 'sat';
return UnitFormatter.parseUserInput(destText, destUnit);
}
/// Determina unidades de origen y destino.
String get _srcUnit => _isSatsToUsd ? 'sat' : 'usd';
String get _destUnit => _isSatsToUsd ? 'usd' : 'sat';
/// Inicia el swap: crea mint quote en destino, obtiene melt quote en origen,
/// muestra fee en modal de confirmación.
Future<void> _startSwap() async {
final walletProvider = context.read<WalletProvider>();
final mintUrl = walletProvider.activeMintUrl;
if (mintUrl == null) return;
final destAmount = _getDestAmount();
if (destAmount <= BigInt.zero) return;
setState(() {
_isSwapping = true;
_swapError = null;
});
try {
// 1. Obtener wallets directamente (sin cambiar activeUnit)
final destWallet = await walletProvider.getWallet(mintUrl, _destUnit);
final srcWallet = await walletProvider.getWallet(mintUrl, _srcUnit);
// 2. Crear mint quote en wallet destino → obtener invoice BOLT11
String? invoice;
final completer = Completer<String>();
_mintSubscription?.cancel();
_mintSubscription = destWallet.mint(
amount: destAmount,
).listen(
(quote) {
if (quote.state == MintQuoteState.unpaid && !completer.isCompleted) {
completer.complete(quote.request);
}
if (quote.state == MintQuoteState.error && !completer.isCompleted) {
completer.completeError(
Exception(quote.error ?? 'Error creating mint quote'),
);
}
},
onError: (e) {
if (!completer.isCompleted) completer.completeError(e);
},
);
invoice = await completer.future;
// 3. Obtener melt quote en wallet origen → fee
final meltQuote = await srcWallet.meltQuote(request: invoice);
if (!mounted) return;
setState(() => _isSwapping = false);
// 4. Mostrar confirmación con fee
_showSwapConfirmation(
meltQuote: meltQuote,
srcWallet: srcWallet,
destWallet: destWallet,
destAmount: destAmount,
);
} catch (e) {
_mintSubscription?.cancel();
if (!mounted) return;
final l10n = L10n.of(context)!;
final errorStr = e.toString().toLowerCase();
setState(() {
_isSwapping = false;
if (errorStr.contains('insufficient') || errorStr.contains('not enough')) {
_swapError = l10n.swapErrorInsufficient;
} else if (errorStr.contains('expired')) {
_swapError = l10n.swapErrorExpired;
} else {
_swapError = l10n.swapErrorGeneric(e.toString());
}
});
}
}
/// Muestra modal de confirmación con desglose de fee.
void _showSwapConfirmation({
required MeltQuote meltQuote,
required Wallet srcWallet,
required Wallet destWallet,
required BigInt destAmount,
}) {
final l10n = L10n.of(context)!;
final srcUnitLabel = UnitFormatter.getUnitLabel(_srcUnit);
final destUnitLabel = UnitFormatter.getUnitLabel(_destUnit);
final total = meltQuote.amount + meltQuote.feeReserve;
showModalBottomSheet(
context: context,
backgroundColor: Colors.transparent,
builder: (ctx) => Container(
padding: const EdgeInsets.all(AppDimensions.paddingMedium),
decoration: BoxDecoration(
color: AppColors.deepVoidPurple,
borderRadius: const BorderRadius.vertical(top: Radius.circular(24)),
border: Border.all(
color: Colors.white.withValues(alpha: 0.1),
width: 1,
),
),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
// Handle
Container(
margin: const EdgeInsets.only(bottom: 16),
width: 40,
height: 4,
decoration: BoxDecoration(
color: Colors.white.withValues(alpha: 0.3),
borderRadius: BorderRadius.circular(2),
),
),
// Icono swap
Container(
width: 64,
height: 64,
decoration: BoxDecoration(
color: AppColors.primaryAction.withValues(alpha: 0.2),
shape: BoxShape.circle,
),
child: const Icon(
LucideIcons.arrowLeftRight,
color: AppColors.primaryAction,
size: 32,
),
),
const SizedBox(height: AppDimensions.paddingMedium),
// Título
Text(
l10n.confirmPayment,
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 20,
fontWeight: FontWeight.bold,
color: Colors.white,
),
),
const SizedBox(height: AppDimensions.paddingSmall),
// Destino: lo que recibes
Text(
'+ ${UnitFormatter.formatBalance(destAmount, _destUnit)} $destUnitLabel',
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 28,
fontWeight: FontWeight.bold,
color: AppColors.success,
),
),
const SizedBox(height: 4),
// Origen: lo que pagas
Text(
'- ${UnitFormatter.formatBalance(meltQuote.amount, _srcUnit)} $srcUnitLabel',
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 16,
fontWeight: FontWeight.w500,
color: Colors.white,
),
),
// Fee
Text(
'+ ~${UnitFormatter.formatBalance(meltQuote.feeReserve, _srcUnit)} $srcUnitLabel fee',
style: TextStyle(
fontFamily: 'Inter',
fontSize: 14,
color: AppColors.textSecondary.withValues(alpha: 0.7),
),
),
const SizedBox(height: AppDimensions.paddingSmall),
// Total
Text(
'Total: ${UnitFormatter.formatBalance(total, _srcUnit)} $srcUnitLabel',
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 16,
fontWeight: FontWeight.w600,
color: AppColors.primaryAction,
),
),
const SizedBox(height: AppDimensions.paddingLarge),
// Botones
Row(
children: [
Expanded(
child: GestureDetector(
onTap: () {
Navigator.pop(ctx);
_mintSubscription?.cancel();
},
child: Container(
padding: const EdgeInsets.symmetric(vertical: 16),
decoration: BoxDecoration(
color: Colors.white.withValues(alpha: 0.1),
borderRadius: BorderRadius.circular(16),
),
child: Center(
child: Text(
l10n.cancel,
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 16,
fontWeight: FontWeight.w600,
color: Colors.white,
),
),
),
),
),
),
const SizedBox(width: AppDimensions.paddingMedium),
Expanded(
child: PrimaryButton(
text: l10n.swapAction,
onPressed: () {
Navigator.pop(ctx);
_executeSwap(
meltQuote: meltQuote,
srcWallet: srcWallet,
destWallet: destWallet,
destAmount: destAmount,
);
},
height: 52,
),
),
],
),
const SizedBox(height: AppDimensions.paddingSmall),
],
),
),
);
}
/// Ejecuta el swap: melt en origen, guarda metadata de ambos lados.
Future<void> _executeSwap({
required MeltQuote meltQuote,
required Wallet srcWallet,
required Wallet destWallet,
required BigInt destAmount,
}) async {
final l10n = L10n.of(context)!;
final walletProvider = context.read<WalletProvider>();
final invoice = meltQuote.request;
setState(() {
_isSwapping = true;
_swapError = null;
});
try {
// Ejecutar melt (paga el invoice Lightning)
await srcWallet.melt(quote: meltQuote);
// Guardar metadata del melt (lado enviado)
await walletProvider.saveSwapMeltMetadata(
srcWallet, invoice, meltQuote.amount,
);
_mintSubscription?.cancel();
if (!mounted) return;
// Éxito: recargar balances, confetti, snackbar
await _loadBalances();
if (!mounted) return;
walletProvider.confettiController.fire();
// En background: esperar a que CDK procese el mint,
// guardar metadata del lado recibido y recargar balances
Future.delayed(const Duration(seconds: 3), () async {
await walletProvider.saveSwapMintMetadata(
destWallet, invoice, destAmount,
);
if (mounted) _loadBalances();
});
// Limpiar campos
_isUpdating = true;
_fromController.clear();
_toController.clear();
_isUpdating = false;
setState(() {
_isSwapping = false;
_swapError = null;
});
if (!mounted) return;
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text(l10n.swapSuccess),
backgroundColor: AppColors.success,
duration: const Duration(seconds: 3),
),
);
} catch (e) {
if (!mounted) return;
final errorStr = e.toString().toLowerCase();
setState(() {
_isSwapping = false;
if (errorStr.contains('insufficient') || errorStr.contains('not enough')) {
_swapError = l10n.swapErrorInsufficient;
} else if (errorStr.contains('expired')) {
_swapError = l10n.swapErrorExpired;
} else {
_swapError = l10n.swapErrorGeneric(e.toString());
}
});
} finally {
_mintSubscription?.cancel();
_mintSubscription = null;
}
}
@@ -188,35 +601,69 @@ class _SwapScreenState extends State<SwapScreen>
l10n.swap,
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 18,
fontWeight: FontWeight.w600,
color: Colors.white,
),
),
centerTitle: true,
),
body: SafeArea(
child: SingleChildScrollView(
child: Padding(
padding: const EdgeInsets.all(AppDimensions.paddingMedium),
child: Column(
children: [
// Precio + chart (arriba)
_buildPriceChart(priceProvider),
const SizedBox(height: AppDimensions.paddingMedium),
const SizedBox(height: AppDimensions.paddingLarge),
_buildFromCard(l10n),
_buildFlipButton(),
_buildToCard(l10n),
const SizedBox(height: AppDimensions.paddingMedium),
const SizedBox(height: AppDimensions.paddingLarge),
PrimaryButton(
text: l10n.swapAction,
onPressed: _amountController.text.isNotEmpty
? () {
// TODO: implement swap logic
HapticFeedback.heavyImpact();
}
: null,
// Cards De/A centradas verticalmente
Expanded(
child: Center(
child: SingleChildScrollView(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
_buildFromCard(l10n),
_buildFlipButton(),
_buildToCard(l10n),
],
),
),
),
),
// Validación + errores + botón fijo abajo
Builder(builder: (_) {
final minError = _validateMinimums(l10n);
final errorMsg = _swapError ?? minError;
final canSwap = _fromController.text.isNotEmpty &&
_toController.text.isNotEmpty &&
minError == null &&
!_isSwapping;
return Column(
mainAxisSize: MainAxisSize.min,
children: [
if (errorMsg != null)
Padding(
padding: const EdgeInsets.only(bottom: 8),
child: Text(
errorMsg,
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 12,
color: AppColors.error,
),
),
),
PrimaryButton(
text: _isSwapping
? l10n.swapProcessing
: l10n.swapAction,
isLoading: _isSwapping,
onPressed: canSwap ? _startSwap : null,
),
],
);
}),
],
),
),
@@ -306,24 +753,26 @@ class _SwapScreenState extends State<SwapScreen>
);
}
Widget _buildFromCard(L10n l10n) {
final fromSymbol = _isSatsToUsd ? '₿' : '\$';
final fromLabel = _isSatsToUsd ? 'sats' : 'USD';
final fromBalance = _isSatsToUsd
? UnitFormatter.formatBalance(_satsBalance, 'sat')
: UnitFormatter.formatBalance(_usdBalance, 'usd');
final fromUnit = _isSatsToUsd ? 'sat' : 'USD';
Widget _buildSwapCard({
required L10n l10n,
required String label,
required String symbol,
required String unitLabel,
required String balance,
required String unit,
required TextEditingController controller,
required bool isSats,
bool showUseAll = false,
}) {
return GlassCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// Label + Balance en la misma línea
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
l10n.swapFrom,
label,
style: TextStyle(
fontFamily: 'Inter',
fontSize: 12,
@@ -335,26 +784,28 @@ class _SwapScreenState extends State<SwapScreen>
mainAxisSize: MainAxisSize.min,
children: [
Text(
'${l10n.balance}: $fromBalance $fromUnit',
'${l10n.balance}: $balance $unit',
style: TextStyle(
fontFamily: 'Inter',
fontSize: 12,
color: AppColors.textSecondary.withValues(alpha: 0.6),
),
),
const SizedBox(width: 6),
GestureDetector(
onTap: _setMaxAmount,
child: Text(
l10n.swapUseAll,
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 12,
fontWeight: FontWeight.w600,
color: AppColors.primaryAction,
if (showUseAll) ...[
const SizedBox(width: 6),
GestureDetector(
onTap: _setMaxAmount,
child: Text(
l10n.swapUseAll,
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 12,
fontWeight: FontWeight.w600,
color: AppColors.primaryAction,
),
),
),
),
],
],
),
],
@@ -362,7 +813,6 @@ class _SwapScreenState extends State<SwapScreen>
const SizedBox(height: 8),
Row(
children: [
// Unit pill
Container(
padding:
const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
@@ -371,7 +821,7 @@ class _SwapScreenState extends State<SwapScreen>
borderRadius: BorderRadius.circular(12),
),
child: Text(
'$fromSymbol $fromLabel',
'$symbol $unitLabel',
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 16,
@@ -381,13 +831,11 @@ class _SwapScreenState extends State<SwapScreen>
),
),
const SizedBox(width: 12),
// Amount input
Expanded(
child: TextField(
key: ValueKey('from_$_isSatsToUsd'),
controller: _amountController,
controller: controller,
keyboardType: TextInputType.numberWithOptions(
decimal: !_isSatsToUsd,
decimal: !isSats,
),
style: const TextStyle(
fontFamily: 'Inter',
@@ -409,7 +857,7 @@ class _SwapScreenState extends State<SwapScreen>
isDense: true,
),
inputFormatters: [
if (_isSatsToUsd)
if (isSats)
FilteringTextInputFormatter.digitsOnly
else
FilteringTextInputFormatter.allow(
@@ -462,6 +910,27 @@ class _SwapScreenState extends State<SwapScreen>
);
}
Widget _buildFromCard(L10n l10n) {
final fromSymbol = _isSatsToUsd ? '₿' : '\$';
final fromLabel = _isSatsToUsd ? 'sats' : 'USD';
final fromBalance = _isSatsToUsd
? UnitFormatter.formatBalance(_satsBalance, 'sat')
: UnitFormatter.formatBalance(_usdBalance, 'usd');
final fromUnit = _isSatsToUsd ? 'sat' : 'USD';
return _buildSwapCard(
l10n: l10n,
label: l10n.swapFrom,
symbol: fromSymbol,
unitLabel: fromLabel,
balance: fromBalance,
unit: fromUnit,
controller: _fromController,
isSats: _isSatsToUsd,
showUseAll: true,
);
}
Widget _buildToCard(L10n l10n) {
final toSymbol = _isSatsToUsd ? '\$' : '₿';
final toLabel = _isSatsToUsd ? 'USD' : 'sats';
@@ -470,70 +939,15 @@ class _SwapScreenState extends State<SwapScreen>
: UnitFormatter.formatBalance(_satsBalance, 'sat');
final toUnit = _isSatsToUsd ? 'USD' : 'sat';
return GlassCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// Label + Balance en la misma línea
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
l10n.swapTo,
style: TextStyle(
fontFamily: 'Inter',
fontSize: 12,
fontWeight: FontWeight.w500,
color: AppColors.textSecondary.withValues(alpha: 0.6),
),
),
Text(
'${l10n.balance}: $toBalance $toUnit',
style: TextStyle(
fontFamily: 'Inter',
fontSize: 12,
color: AppColors.textSecondary.withValues(alpha: 0.6),
),
),
],
),
const SizedBox(height: 8),
Row(
children: [
Container(
padding:
const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
decoration: BoxDecoration(
color: Colors.white.withValues(alpha: 0.08),
borderRadius: BorderRadius.circular(12),
),
child: Text(
'$toSymbol $toLabel',
style: const TextStyle(
fontFamily: 'Inter',
fontSize: 16,
fontWeight: FontWeight.w600,
color: Colors.white,
),
),
),
const SizedBox(width: 12),
Expanded(
child: Text(
_convertedAmount.isEmpty ? '≈ 0' : '≈ $_convertedAmount',
textAlign: TextAlign.right,
style: TextStyle(
fontFamily: 'Inter',
fontSize: 24,
fontWeight: FontWeight.bold,
color: Colors.white.withValues(alpha: 0.7),
),
),
),
],
),
],
),
return _buildSwapCard(
l10n: l10n,
label: l10n.swapTo,
symbol: toSymbol,
unitLabel: toLabel,
balance: toBalance,
unit: toUnit,
controller: _toController,
isSats: !_isSatsToUsd,
);
}