feat: Add memo support for swap (#3229)

* feat: Add memo support for swap

* fix: Error on swap page select receiver bottomsheet when picking receiveing currency that's not a wallet type

* feat: exclude providers that do not support memo when receive currency needs it, also show passed memo in confirmation and trade history sheets

* fix: overflow for destination tag on swap confirmation

* Update lib/view_model/exchange/exchange_view_model.dart [skip ci]

* Update lib/exchange/provider/trocador_exchange_provider.dart [skip ci]

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>

lib/view_model/exchange/exchange_view_model.dart

@@ -57,6 +57,7 @@ import 'package:cake_wallet/view_model/send/fees_view_model.dart';
 import 'package:cake_wallet/view_model/unspent_coins/unspent_coins_list_view_model.dart';
 import 'package:cw_core/crypto_amount_format.dart';
 import 'package:cw_core/crypto_currency.dart';
+import 'package:cw_core/currencies_with_memo.dart';
 import 'package:cw_core/erc20_token.dart';
 import 'package:cw_core/spl_token.dart';
 import 'package:cw_core/sync_status.dart';
@@ -124,12 +125,7 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
     _useTorOnly = _settingsStore.exchangeStatus == ExchangeApiMode.torOnly;
     _setProviders();
     const excludeDepositCurrencies = [CryptoCurrency.btt];
-    const excludeReceiveCurrencies = [
-      CryptoCurrency.xlm,
-      CryptoCurrency.xrp,
-      CryptoCurrency.bnb,
-      CryptoCurrency.btt
-    ];
+    const excludeReceiveCurrencies = [CryptoCurrency.btt];
     _initialPairBasedOnWallet();
 
     unspentCoinsListViewModel.initialSetup().then((_) {
@@ -391,6 +387,9 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
   @observable
   String receiveAddress;
 
+  @observable
+  String receiveAddressExtraId = '';
+
   @observable
   String? receiveAddressDisplayName;
 
@@ -436,13 +435,18 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
 
   @computed
   Future<List<WalletInfo>> get receiveWallets async {
-    WalletType? type;
-    type = cryptoCurrencyOrTokenToWalletType(receiveCurrency);
-    if (type == null) {
-      type = cryptoCurrencyOrTokenToWalletType(CryptoCurrency.fromString(receiveCurrency.tag ?? ""));
-    }
+    try {
+      WalletType? type;
+      type = cryptoCurrencyOrTokenToWalletType(receiveCurrency);
+      if (type == null) {
+        type =
+            cryptoCurrencyOrTokenToWalletType(CryptoCurrency.fromString(receiveCurrency.tag ?? ""));
+      }
 
-    return await WalletInfo.selectList("type = ?", [type!.index]);
+      return await WalletInfo.selectList("type = ?", [type!.index]);
+    } catch (e) {
+      return [];
+    }
   }
 
   Future<List<WalletInfoAddressInfo>> addressesForAccountsWallet(WalletInfo wallet) async {
@@ -761,6 +765,9 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
         currency == receiveCurrency)) {
       receiveAddress = "";
     }
+    if (currency != receiveCurrency) {
+      receiveAddressExtraId = "";
+    }
 
     receiveCurrency = currency;
     isFixedRateMode = false;
@@ -884,6 +891,9 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
       (provider.description == ExchangeProviderDescription.swapsXyz ||
           provider.description == ExchangeProviderDescription.nearIntents);
 
+  bool _excludeProviderForReceiveExtraId(ExchangeProvider provider) =>
+      memoLabelTypeFor(receiveCurrency) != null && !provider.supportsMemoOrDestinationTag;
+
   Future<void> calculateBestRate() async {
     if (depositCurrency == receiveCurrency) {
       bestRate = 0.0;
@@ -895,6 +905,7 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
 
     final validProvidersForAmount = _tradeAvailableProviders.where((provider) {
       if (_excludeProviderForSwapAll(provider)) return false;
+      if (_excludeProviderForReceiveExtraId(provider)) return false;
 
       final limits = _providerLimits[provider];
 
@@ -972,6 +983,7 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
     try {
       final futures = selectedProviders
           .where((provider) => providerList.contains(provider))
+          .where((provider) => !_excludeProviderForReceiveExtraId(provider))
           .map((provider) async {
         final limits = await provider
             .fetchLimits(
@@ -1050,6 +1062,13 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
       }
     }
 
+    if (forcedProvider != null && _excludeProviderForReceiveExtraId(forcedProvider!)) {
+      tradeState = TradeIsCreatedFailure(
+          title: S.current.trade_not_created,
+          error: S.current.none_of_selected_providers_can_exchange);
+      return;
+    }
+
     Map<double, ExchangeProvider> providers;
     if (forcedProvider != null) {
       providers = {forcedProviderRate: forcedProvider!};
@@ -1138,6 +1157,10 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
         if (isFixedRateMode && provider.supportsFixedRate == false) {
           continue;
         }
+        
+        if (_excludeProviderForReceiveExtraId(provider)) {
+          continue;
+        }
 
         // Skip Swaps.xyz when sending from external
         if (isSendFromExternal &&
@@ -1160,6 +1183,7 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
           toAmount: _receiveAmount.replaceAll(',', '.'),
           refundAddress: depositAddress,
           toAddress: receiveAddress,
+          toAddressExtraId: receiveAddressExtraId.trim(),
           isFixedRate: isFixedRateMode,
         );
 
@@ -1260,6 +1284,7 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
         depositCurrency == wallet.currency ? wallet.walletAddresses.addressForExchange : '';
     receiveAddress =
         receiveCurrency == wallet.currency ? wallet.walletAddresses.addressForExchange : '';
+    receiveAddressExtraId = '';
     isDepositAddressEnabled = !(depositCurrency == wallet.currency);
     isFixedRateMode = false;
     _onPairChange();

lib/view_model/trade_details_view_model.dart

@@ -26,6 +26,7 @@ import 'package:cake_wallet/src/screens/transaction_details/standart_list_item.d
 import 'package:cake_wallet/store/app_store.dart';
 import 'package:cake_wallet/utils/date_formatter.dart';
 import 'package:cake_wallet/utils/show_bar.dart';
+import 'package:cw_core/currencies_with_memo.dart';
 import 'package:cw_core/utils/print_verbose.dart';
 import 'package:flutter/services.dart';
 import 'package:mobx/mobx.dart';
@@ -182,6 +183,18 @@ abstract class TradeDetailsViewModelBase with Store {
       ));
     }
 
+    final destinationMemo = trade.toAddressExtraId;
+    final destinationCurrency = trade.to;
+    if (destinationMemo != null &&
+        destinationMemo.isNotEmpty &&
+        destinationCurrency != null) {
+      final isDestinationTag =
+          memoLabelTypeFor(destinationCurrency) == MemoLabelType.destinationTag;
+      items.add(StandartListItem(
+          title: isDestinationTag ? S.current.destination_tag : S.current.memo,
+          value: destinationMemo));
+    }
+
     items.add(StandartListItem(
         title: S.current.trade_details_provider, value: trade.provider.toString()));