From 8f7819be8205728dcc443bc1249ae895b29621d0 Mon Sep 17 00:00:00 2001
From: David Adegoke <64401859+Blazebrain@users.noreply.github.com>
Date: Fri, 13 Mar 2026 01:32:37 +0100
Subject: [PATCH] fix: Swap external send QR using trade currency instead of
 selected wallet (#3068)

---
 lib/utils/token_utilities.dart                |  9 +++++++
 .../exchange/exchange_trade_view_model.dart   | 25 +++++++++++--------
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/lib/utils/token_utilities.dart b/lib/utils/token_utilities.dart
index d38816fe7..32ef710fd 100644
--- a/lib/utils/token_utilities.dart
+++ b/lib/utils/token_utilities.dart
@@ -231,6 +231,15 @@ class TokenUtilities {
     return null;
   }
 
+  static Erc20Token? findErc20TokenForSwap(CryptoCurrency currency) {
+    if (currency is Erc20Token) return currency;
+
+    for (final token in loadDefaultEvmTokensForSwap()) {
+      if (_matchesCurrency(token, currency)) return token;
+    }
+    return null;
+  }
+
   static bool isNativeToken(CryptoCurrency currency) {
     final title = currency.title.toLowerCase();
     final tag = currency.tag?.toLowerCase();
diff --git a/lib/view_model/exchange/exchange_trade_view_model.dart b/lib/view_model/exchange/exchange_trade_view_model.dart
index 04180e7d7..e85d493b2 100644
--- a/lib/view_model/exchange/exchange_trade_view_model.dart
+++ b/lib/view_model/exchange/exchange_trade_view_model.dart
@@ -478,7 +478,11 @@ abstract class ExchangeTradeViewModelBase with Store {
       return null;
     }
 
-    switch (wallet.type) {
+    // Using trade currency here so the external-send QR encodes the correct scheme
+    final uriWalletType =
+        cryptoCurrencyOrTokenToWalletType(fromCurrency) ?? wallet.type;
+
+    switch (uriWalletType) {
       case WalletType.bitcoin:
         return BitcoinURI(address: inputAddress, amount: amount);
       case WalletType.bitcoinCash:
@@ -524,17 +528,16 @@ abstract class ExchangeTradeViewModelBase with Store {
         contractAddress: null,
       );
     } else {
-      if (isEVMCompatibleChain(wallet.type)) {
-        final erc20Token = TokenUtilities.findErc20Token(currency, wallet);
+      final erc20Token = TokenUtilities.findErc20Token(currency, wallet) ??
+          TokenUtilities.findErc20TokenForSwap(currency);
 
-        if (erc20Token != null) {
-          return ERC681URI(
-            chainId: chainId,
-            address: address,
-            amount: amount,
-            contractAddress: erc20Token.contractAddress,
-          );
-        }
+      if (erc20Token != null) {
+        return ERC681URI(
+          chainId: chainId,
+          address: address,
+          amount: amount,
+          contractAddress: erc20Token.contractAddress,
+        );
       }
       return null;
     }