| 1 | import 'dart:async'; |
| 2 | import 'dart:typed_data'; |
| 3 | |
| 4 | import 'package:bitbox_flutter/bitbox_manager.dart'; |
| 5 | import 'package:cw_core/hardware/device_not_connected_exception.dart' as exception; |
| 6 | import 'package:web3dart/crypto.dart'; |
| 7 | import 'package:web3dart/web3dart.dart'; |
| 8 | |
| 9 | class EvmBitboxCredentials extends CredentialsWithKnownAddress { |
| 10 | final String _address; |
| 11 | |
| 12 | BitboxManager? bitboxManager; |
| 13 | String? derivationPath; |
| 14 | |
| 15 | EvmBitboxCredentials(this._address); |
| 16 | |
| 17 | @override |
| 18 | EthereumAddress get address => EthereumAddress.fromHex(_address); |
| 19 | |
| 20 | void setBitbox(BitboxManager connection, [String? derivationPath_]) { |
| 21 | bitboxManager = connection; |
| 22 | derivationPath = derivationPath_ ?? "m/44'/60'/0'/0/0"; |
| 23 | } |
| 24 | |
| 25 | @override |
| 26 | MsgSignature signToEcSignature(Uint8List payload, {int? chainId, bool isEIP1559 = false}) => |
| 27 | throw UnimplementedError("EvmLedgerCredentials.signToEcSignature"); |
| 28 | |
| 29 | @override |
| 30 | Future<MsgSignature> signToSignature(Uint8List payload, |
| 31 | {int? chainId, bool isEIP1559 = false}) async { |
| 32 | if (bitboxManager == null) { |
| 33 | throw exception.DeviceNotConnectedException(); |
| 34 | } |
| 35 | |
| 36 | if (isEIP1559) payload = payload.sublist(1); |
| 37 | final sig = await bitboxManager! |
| 38 | .signETHRLPTransaction(chainId ?? 1, derivationPath!, bytesToHex(payload), isEIP1559); |
| 39 | |
| 40 | final r = bytesToHex(sig.sublist(0, 32)); |
| 41 | final s = bytesToHex(sig.sublist(32, 32 + 32)); |
| 42 | final v = sig.last.toInt(); |
| 43 | |
| 44 | if (isEIP1559) { |
| 45 | return MsgSignature(BigInt.parse(r, radix: 16), BigInt.parse(s, radix: 16), v); |
| 46 | } |
| 47 | |
| 48 | var truncChainId = chainId ?? 1; |
| 49 | while (truncChainId.bitLength > 32) { |
| 50 | truncChainId >>= 8; |
| 51 | } |
| 52 | |
| 53 | final truncTarget = truncChainId * 2 + 35; |
| 54 | |
| 55 | int parity = v; |
| 56 | if (truncTarget & 0xff == v) { |
| 57 | parity = 0; |
| 58 | } else if ((truncTarget + 1) & 0xff == v) { |
| 59 | parity = 1; |
| 60 | } |
| 61 | |
| 62 | // https://github.com/ethereumjs/ethereumjs-util/blob/8ffe697fafb33cefc7b7ec01c11e3a7da787fe0e/src/signature.ts#L26 |
| 63 | final chainIdV = chainId != null ? (parity + (chainId * 2 + 35)) : parity; |
| 64 | |
| 65 | return MsgSignature(BigInt.parse(r, radix: 16), BigInt.parse(s, radix: 16), chainIdV); |
| 66 | } |
| 67 | |
| 68 | @override |
| 69 | Future<Uint8List> signPersonalMessage(Uint8List payload, {int? chainId}) async { |
| 70 | if (isNotConnected) throw exception.DeviceNotConnectedException(); |
| 71 | return await bitboxManager!.signETHMessage(chainId ?? 1, derivationPath!, payload); |
| 72 | } |
| 73 | |
| 74 | @override |
| 75 | Uint8List signPersonalMessageToUint8List(Uint8List payload, {int? chainId}) => |
| 76 | throw UnimplementedError("EvmLedgerCredentials.signPersonalMessageToUint8List"); |
| 77 | |
| 78 | bool get isNotConnected => bitboxManager == null; |
| 79 | } |