[TVF] Bitcoin (#177)

* Bitcoin TVF

* merge conflicts and test

* Update packages/reown_sign/lib/sign_engine.dart

Co-authored-by: Copilot <[email protected]>

* merge conflicts

---------

Co-authored-by: Copilot <[email protected]>

Author: quetool

packages/reown_core/lib/models/tvf_data.dart

@@ -44,6 +44,8 @@ class TVFData {
     'solana_signTransaction',
     'solana_signAllTransactions',
     'wallet_sendCalls',
+    // Bitcoin
+    'sendTransfer',
     // Hedera
     'hedera_signAndExecuteTransaction',
     'hedera_executeTransaction',

packages/reown_core/test/utils_test.dart

@@ -172,5 +172,24 @@ void main() {
       );
       expect(transactionId, '[email protected]');
     });
+
+    test('should parse bitcoin\'s sendTransfer and extract txid', () {
+      final jsonRPCResponse = {
+        'jsonrpc': '2.0',
+        'id': 1,
+        'result': {
+          'txid':
+              'f007551f169722ce74104d6673bd46ce193c624b8550889526d1b93820d725f7'
+        },
+      };
+      final response = JsonRpcResponse.fromJson(jsonRPCResponse);
+      final result = (response.result as Map<String, dynamic>);
+      final txid = ReownCoreUtils.recursiveSearchForMapKey(
+        result,
+        'txid',
+      );
+      expect(txid,
+          'f007551f169722ce74104d6673bd46ce193c624b8550889526d1b93820d725f7');
+    });
   });
 }

packages/reown_sign/lib/sign_engine.dart

@@ -2998,9 +2998,21 @@ class ReownSign implements IReownSign {
           core.logger.e('[$runtimeType] _collectHashes: hedera, $e');
         }
         return null;
+      case 'bip122':
+        try {
+          final result = (response.result as Map<String, dynamic>);
+          final txId = ReownCoreUtils.recursiveSearchForMapKey(
+            result,
+            'txid',
+          );
+          return <String>[txId];
+        } catch (e) {
+          core.logger.e('[$runtimeType] _collectHashes: bip122, $e');
+        }
+        return null;
       default:
         // default to EVM
-        return List<String>.from([response.result]);
+        return <String>[response.result];
     }
   }
 }