fix: anypay (#3507)

* fix android CI

* fix: handle the parser seeing chainless QRs in the old flow as belonging to the current wallet, causing the error jack reported

* fix: handle network switch when anypay is interrupted mid flow and currency is changed

lib/new-ui/pages/send_page.dart

@@ -64,6 +64,7 @@ import "package:cw_core/amount/amount_sanitizer.dart";
 import "package:cw_core/amount/money.dart";
 import "package:cw_core/crypto_currency.dart";
 import "package:cw_core/currency_for_wallet_type.dart";
+import "package:cw_core/erc20_token.dart";
 import "package:cw_core/lnurl.dart";
 import "package:cw_core/payment_uris.dart";
 import "package:cw_core/transaction_priority.dart";
@@ -247,35 +248,17 @@ class _NewSendPageState extends State<NewSendPage> {
 
     if (widget.initialPaymentRequest != null) {
       if (_isInitialRequestTypeSameAsCurrentWallet()) {
-        _addressControllers[0].text = widget.initialPaymentRequest!.address;
-        // _memoControllers[0].text = widget.initialPaymentRequest!.note;
-        _applyNote(widget.initialPaymentRequest!.note, 0);
         final contractAddress = widget.initialPaymentRequest!.contractAddress;
         if (contractAddress != null && contractAddress.isNotEmpty) {
           WidgetsBinding.instance.addPostFrameCallback((_) async {
             if (!mounted) {
               return;
             }
-            final token = await TokenUtilities.findTokenByAddress(
-              walletType: widget.sendViewModel.wallet.type,
-              address: contractAddress,
-            );
-            if (!mounted) {
-              return;
-            }
-
-            if (token == null) {
-              _showUnsupportedTokenAlert();
-              return;
-            }
-            await widget.sendViewModel.fetchTokenForContractAddress(contractAddress);
-            if (!mounted) {
-              return;
-            }
-            _amountControllers[0].text =
-                widget.initialPaymentRequest!.resolveTokenAmount(token) ?? "";
+            await _applyPaymentSelectingCurrency(widget.initialPaymentRequest!, null);
           });
         } else {
+          _addressControllers[0].text = widget.initialPaymentRequest!.address;
+          _applyNote(widget.initialPaymentRequest!.note, 0);
           _amountControllers[0].text = widget.initialPaymentRequest!.amount;
         }
       } else {
@@ -1049,8 +1032,9 @@ class _NewSendPageState extends State<NewSendPage> {
 
   Future<void> _handleManualNetworkSelection(ChainInfo target) async {
     final address = _addressControllers[_selectedOutput].text.trim();
-    final amount = _amountControllers[_selectedOutput].text;
     final note = _memoControllers[_selectedOutput].text;
+    final isTokenSelected = widget.sendViewModel.selectedCryptoCurrency is Erc20Token;
+    final amount = isTokenSelected ? "" : _amountControllers[_selectedOutput].text;
     final paymentRequest = PaymentRequest(address, amount, note, "", null);
     await _handleEvmNetworkFlow(target, paymentRequest);
   }
@@ -1153,7 +1137,7 @@ class _NewSendPageState extends State<NewSendPage> {
           if (isCrossChain) {
             await _handleEvmNetworkFlow(targetChain, paymentRequest);
           } else if (widget.sendViewModel.isEVMWallet) {
-            _applyPaymentRequest(paymentRequest);
+            await _applyPaymentSelectingCurrency(paymentRequest, null);
           } else {
             await _showEvmNetworkPicker(paymentRequest, result.walletType);
           }
@@ -1328,8 +1312,12 @@ class _NewSendPageState extends State<NewSendPage> {
     String? amountOverride;
     final contract = paymentRequest.contractAddress;
     if (contract != null && contract.isNotEmpty) {
+      final walletType = widget.sendViewModel.wallet.type;
+      final lookupType = evm != null && isEVMCompatibleChain(walletType)
+          ? (evm!.getWalletTypeByChainId(_currentEvmChainIdOrMainnet()) ?? walletType)
+          : walletType;
       final token = await TokenUtilities.findTokenByAddress(
-        walletType: widget.sendViewModel.wallet.type,
+        walletType: lookupType,
         address: contract,
       );
       if (!mounted) {
@@ -1337,13 +1325,21 @@ class _NewSendPageState extends State<NewSendPage> {
       }
 
       if (token == null) {
+        final rerouted = await _rerouteChainlessContractPayment(paymentRequest);
+        if (rerouted || !mounted) {
+          return;
+        }
         _showUnsupportedTokenAlert();
         return;
       }
-      await widget.sendViewModel.fetchTokenForContractAddress(contract);
+      await widget.sendViewModel.fetchTokenForContractAddress(contract, walletType: lookupType);
       amountOverride = paymentRequest.resolveTokenAmount(token);
     } else if (fallbackCurrency != null) {
       widget.sendViewModel.setSelectedCryptoCurrency(fallbackCurrency.title);
+      if (paymentRequest.amount.isEmpty) {
+        widget.sendViewModel.outputs[_selectedOutput].setCryptoAmount("");
+        _amountControllers[_selectedOutput].clear();
+      }
     }
     if (!mounted) {
       return;
@@ -1351,6 +1347,44 @@ class _NewSendPageState extends State<NewSendPage> {
     _applyPaymentRequest(paymentRequest, amountOverride: amountOverride);
   }
 
+  Future<bool> _rerouteChainlessContractPayment(PaymentRequest paymentRequest) async {
+    if (evm == null || paymentRequest.chainId != null) {
+      return false;
+    }
+
+    if (paymentRequest.scheme.toLowerCase() != "ethereum") {
+      return false;
+    }
+
+    final contract = paymentRequest.contractAddress;
+    if (contract == null || contract.isEmpty) {
+      return false;
+    }
+
+    final currentChainId = isEVMCompatibleChain(widget.sendViewModel.wallet.type)
+        ? _currentEvmChainIdOrMainnet()
+        : null;
+
+    // QRs from old app versions omit the chainId on mainnet, so a contract the current
+    // network does not know may still belong to another EVM network
+    final chainId = await TokenUtilities.findEvmChainIdForContract(
+      contract,
+      excludingChainId: currentChainId,
+    );
+    if (chainId == null || !mounted) {
+      return false;
+    }
+
+    final targetChain = evm!.getChainInfoByChainId(chainId);
+    if (targetChain == null) {
+      return false;
+    }
+
+    printV("chainless contract payment rerouted to chainId $chainId");
+    await _handleEvmNetworkFlow(targetChain, paymentRequest);
+    return true;
+  }
+
   Future<void> _completeWalletSwitch(
     WalletInfo wallet,
     PaymentFlowResult result,

lib/utils/token_utilities.dart

@@ -8,6 +8,7 @@ import 'package:cw_core/currency_for_wallet_type.dart';
 import 'package:cw_core/erc20_token.dart';
 import 'package:cw_core/spl_token.dart';
 import 'package:cw_core/tron_token.dart';
+import "package:cw_core/utils/print_verbose.dart";
 import 'package:cw_core/wallet_base.dart';
 import 'package:cw_core/wallet_info.dart';
 import 'package:cw_core/wallet_type.dart';
@@ -163,6 +164,37 @@ class TokenUtilities {
     return null;
   }
 
+  static Future<int?> findEvmChainIdForContract(
+    String contractAddress, {
+    int? excludingChainId,
+  }) async {
+    if (evm == null || contractAddress.isEmpty) {
+      return null;
+    }
+
+    try {
+      for (final chain in evm!.getAllChains()) {
+        if (chain.chainId == excludingChainId) {
+          continue;
+        }
+
+        final walletType = evm!.getWalletTypeByChainId(chain.chainId);
+        if (walletType == null) {
+          continue;
+        }
+
+        final token = await findTokenByAddress(walletType: walletType, address: contractAddress);
+        if (token != null) {
+          return chain.chainId;
+        }
+      }
+    } catch (e) {
+      printV("findEvmChainIdForContract failed: $e");
+    }
+
+    return null;
+  }
+
   static Future<Box<Erc20Token>> _openEvmTokensBoxFor(WalletInfo walletInfo) async {
     final walletKey = walletInfo.name.replaceAll(' ', '_');
     final boxName = _getErc20TokensBoxName(walletKey, walletInfo.type);

lib/view_model/send/send_view_model.dart

@@ -126,9 +126,8 @@ abstract class SendViewModelBase extends WalletChangeListenerViewModel with Stor
         super(appStore: _appStore) {
     outputs.add(Output(wallet, _appStore, _fiatConversationStore, _outputCryptoCurrencyHandler));
 
-    unspentCoinsListViewModel
-        .initialSetup();
-        // .then((_) => unspentCoinsListViewModel.resetUnspentCoinsInfoSelections());
+    unspentCoinsListViewModel.initialSetup();
+    // .then((_) => unspentCoinsListViewModel.resetUnspentCoinsInfoSelections());
 
     reaction((_) {
       if (isEVMCompatibleChain(wallet.type)) {
@@ -1719,9 +1718,10 @@ abstract class SendViewModelBase extends WalletChangeListenerViewModel with Stor
   String? payjoinUri;
 
   @action
-  Future<void> fetchTokenForContractAddress(String contractAddress) async {
+  Future<void> fetchTokenForContractAddress(String contractAddress,
+      {WalletType? walletType}) async {
     final token = await TokenUtilities.findTokenByAddress(
-      walletType: wallet.type,
+      walletType: walletType ?? wallet.type,
       address: contractAddress,
     );