| 1 | import 'dart:convert'; |
| 2 | |
| 3 | import 'package:cake_wallet/di.dart'; |
| 4 | import 'package:cake_wallet/src/screens/wallet_connect/services/walletkit_service.dart'; |
| 5 | import 'package:convert/convert.dart'; |
| 6 | import 'package:flutter/foundation.dart'; |
| 7 | import 'package:reown_walletkit/reown_walletkit.dart'; |
| 8 | |
| 9 | class EthUtils { |
| 10 | static String getUtf8Message(String maybeHex) { |
| 11 | if (maybeHex.startsWith('0x')) { |
| 12 | final List<int> decoded = hex.decode( |
| 13 | maybeHex.substring(2), |
| 14 | ); |
| 15 | return utf8.decode(decoded); |
| 16 | } |
| 17 | |
| 18 | return maybeHex; |
| 19 | } |
| 20 | |
| 21 | static String? getAddressFromSessionRequest(SessionRequest request) { |
| 22 | try { |
| 23 | final paramsList = List<String?>.from((request.params as List)); |
| 24 | if (request.method == 'personal_sign') { |
| 25 | // for `personal_sign` first value in params has to be always the message |
| 26 | paramsList.removeAt(0); |
| 27 | } |
| 28 | |
| 29 | return paramsList.firstWhere((p) { |
| 30 | try { |
| 31 | EthereumAddress.fromHex(p ?? ''); |
| 32 | return true; |
| 33 | } catch (e) { |
| 34 | return false; |
| 35 | } |
| 36 | }); |
| 37 | } catch (e) { |
| 38 | debugPrint(e.toString()); |
| 39 | return null; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | static dynamic getDataFromSessionRequest(SessionRequest request) { |
| 44 | try { |
| 45 | final paramsList = List.from((request.params as List)); |
| 46 | if (request.method == 'personal_sign') { |
| 47 | return paramsList.first; |
| 48 | } |
| 49 | return paramsList.firstWhere((p) { |
| 50 | final address = getAddressFromSessionRequest(request); |
| 51 | return p != address; |
| 52 | }); |
| 53 | } catch (e) { |
| 54 | debugPrint('getDataFromSessionRequest $e'); |
| 55 | return null; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | static Map<String, dynamic>? getTransactionFromSessionRequest( |
| 60 | SessionRequest request, |
| 61 | ) { |
| 62 | try { |
| 63 | final param = (request.params as List<dynamic>).first; |
| 64 | return param as Map<String, dynamic>; |
| 65 | } catch (e) { |
| 66 | debugPrint('getTransactionFromSessionRequest $e'); |
| 67 | return null; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | static Future<dynamic> decodeMessageEvent(MessageEvent event) async { |
| 72 | final walletKit = getIt<WalletKitService>().walletKit; |
| 73 | |
| 74 | final payloadString = await walletKit.core.crypto.decode( |
| 75 | event.topic, |
| 76 | event.message, |
| 77 | ); |
| 78 | |
| 79 | if (payloadString == null) return null; |
| 80 | |
| 81 | final data = jsonDecode(payloadString) as Map<String, dynamic>; |
| 82 | if (data.containsKey('method')) { |
| 83 | return JsonRpcRequest.fromJson(data); |
| 84 | } else { |
| 85 | return JsonRpcResponse.fromJson(data); |
| 86 | } |
| 87 | } |
| 88 | } |