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WIP eth token abi fetch and parsing

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This commit is contained in:
julian 2023-03-23 18:05:35 -06:00
parent 85c416fb50
commit b27b90c08a
2 changed files with 161 additions and 61 deletions
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125
lib/services/ethereum/ethereum_api.dart
View file

@ -468,46 +468,89 @@ abstract class EthereumAPI {
}
}
/// Fetch the underlying contract address that a proxy contract points to
static Future<EthereumResponse<String>> getProxyTokenImplementation(
String contractAddress) async {
try {
final response = await get(Uri.parse(
// "$stackURI?module=contract&action=getsourcecode&address=$contractAddress"));
"$etherscanApi?module=contract&action=getsourcecode&address=$contractAddress&apikey=EG6J7RJIQVSTP2BS59D3TY2G55YHS5F2HP"));
if (response.statusCode == 200) {
final json = jsonDecode(response.body);
if (json["message"] == "OK") {
final list = json["result"] as List;
final map = Map<String, dynamic>.from(list.first as Map);
// static Future<EthereumResponse<String>> getTokenAbi22(
// String contractAddress) async {
// try {
// final response = await get(
// Uri.parse(
// "https://api.etherscan.io/api?module=contract&action=getabi&address=$contractAddress&apikey=EG6J7RJIQVSTP2BS59D3TY2G55YHS5F2HP",
// ),
// );
//
// if (response.statusCode == 200) {
// final json = jsonDecode(response.body) as Map;
// print("========================== 222222222222222 ================");
// dev.log((jsonDecode(json["result"] as String)).toString());
// print(
// "============================ 2222222222222222222 ==============");
//
// return EthereumResponse(
// json["result"] as String,
// null,
// );
// } else {
// throw EthApiException(
// "getTokenAbi($contractAddress) failed with status code: "
// "${response.statusCode}",
// );
// }
// } on EthApiException catch (e) {
// return EthereumResponse(
// null,
// e,
// );
// } catch (e, s) {
// Logging.instance.log(
// "getTokenAbi(): $e\n$s",
// level: LogLevel.Error,
// );
// return EthereumResponse(
// null,
// EthApiException(e.toString()),
// );
// }
// }
return EthereumResponse(
map["Implementation"] as String,
null,
);
} else {
throw EthApiException(json["message"] as String);
}
} else {
throw EthApiException(
"fetchProxyTokenImplementation($contractAddress) failed with status code: "
"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
"fetchProxyTokenImplementation(): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
// /// Fetch the underlying contract address that a proxy contract points to
// static Future<EthereumResponse<String>> getProxyTokenImplementation(
// String contractAddress) async {
// try {
// final response = await get(Uri.parse(
// "$stackURI?module=contract&action=getsourcecode&address=$contractAddress"));
// // "$etherscanApi?module=contract&action=getsourcecode&address=$contractAddress&apikey=EG6J7RJIQVSTP2BS59D3TY2G55YHS5F2HP"));
// if (response.statusCode == 200) {
// final json = jsonDecode(response.body);
// if (json["message"] == "OK") {
// final list = json["result"] as List;
// final map = Map<String, dynamic>.from(list.first as Map);
//
// return EthereumResponse(
// map["Implementation"] as String,
// null,
// );
// } else {
// throw EthApiException(json["message"] as String);
// }
// } else {
// throw EthApiException(
// "fetchProxyTokenImplementation($contractAddress) failed with status code: "
// "${response.statusCode}",
// );
// }
// } on EthApiException catch (e) {
// return EthereumResponse(
// null,
// e,
// );
// } catch (e, s) {
// Logging.instance.log(
// "fetchProxyTokenImplementation(): $e\n$s",
// level: LogLevel.Error,
// );
// return EthereumResponse(
// null,
// EthApiException(e.toString()),
// );
// }
// }
}

97
lib/services/ethereum/ethereum_token_service.dart
View file

@ -1,4 +1,5 @@
import 'dart:async';
import 'dart:convert';
import 'package:decimal/decimal.dart';
import 'package:ethereum_addresses/ethereum_addresses.dart';
@ -24,6 +25,7 @@ import 'package:stackwallet/utilities/default_nodes.dart';
import 'package:stackwallet/utilities/enums/coin_enum.dart';
import 'package:stackwallet/utilities/enums/fee_rate_type_enum.dart';
import 'package:stackwallet/utilities/eth_commons.dart';
import 'package:stackwallet/utilities/extensions/impl/contract_abi.dart';
import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';
import 'package:stackwallet/utilities/format.dart';
import 'package:stackwallet/utilities/logger.dart';
@ -116,7 +118,10 @@ class EthTokenWallet extends ChangeNotifier with EthTokenCache {
required EthContract forContract,
required String usingContractAddress,
}) async {
final abiResponse = await EthereumAPI.getTokenAbi(usingContractAddress);
final abiResponse = await EthereumAPI.getTokenAbi(
name: forContract.name,
contractAddress: usingContractAddress,
);
// Fetch token ABI so we can call token functions
if (abiResponse.value != null) {
final updatedToken = forContract.copyWith(abi: abiResponse.value!);
@ -132,12 +137,12 @@ class EthTokenWallet extends ChangeNotifier with EthTokenCache {
final contractAddress =
web3dart.EthereumAddress.fromHex(tokenContract.address);
if (tokenContract.abi == null) {
_tokenContract = await _updateTokenABI(
forContract: tokenContract,
usingContractAddress: contractAddress.hex,
);
}
// if (tokenContract.abi == null) {
_tokenContract = await _updateTokenABI(
forContract: tokenContract,
usingContractAddress: contractAddress.hex,
);
// }
String? mnemonicString = await ethWallet.mnemonicString;
@ -149,7 +154,10 @@ class EthTokenWallet extends ChangeNotifier with EthTokenCache {
_credentials = web3dart.EthPrivateKey.fromHex(privateKey);
_deployedContract = web3dart.DeployedContract(
web3dart.ContractAbi.fromJson(tokenContract.abi!, tokenContract.name),
ContractAbiExtensions.fromJsonList(
jsonList: tokenContract.abi!,
name: tokenContract.name,
),
contractAddress,
);
@ -157,24 +165,73 @@ class EthTokenWallet extends ChangeNotifier with EthTokenCache {
_balanceFunction = _deployedContract.function('balanceOf');
_sendFunction = _deployedContract.function('transfer');
} catch (_) {
// function not found so likely a proxy so we need to fetch the impl
final contractAddressResponse =
await EthereumAPI.getProxyTokenImplementation(contractAddress.hex);
//====================================================================
final list = List<Map<String, dynamic>>.from(
jsonDecode(tokenContract.abi!) as List);
final functionNames = list.map((e) => e["name"] as String);
if (contractAddressResponse.value != null) {
_tokenContract = await _updateTokenABI(
forContract: tokenContract,
usingContractAddress: contractAddressResponse.value!,
if (!functionNames.contains("balanceOf")) {
list.add(
{
"encoding": "0x70a08231",
"inputs": [
{"name": "account", "type": "address"}
],
"name": "balanceOf",
"outputs": [
{"name": "val_0", "type": "uint256"}
],
"signature": "balanceOf(address)",
"type": "function"
},
);
} else {
throw contractAddressResponse.exception!;
}
if (!functionNames.contains("transfer")) {
list.add(
{
"encoding": "0xa9059cbb",
"inputs": [
{"name": "dst", "type": "address"},
{"name": "rawAmount", "type": "uint256"}
],
"name": "transfer",
"outputs": [
{"name": "val_0", "type": "bool"}
],
"signature": "transfer(address,uint256)",
"type": "function"
},
);
}
//--------------------------------------------------------------------
//====================================================================
// function not found so likely a proxy so we need to fetch the impl
//====================================================================
final updatedToken = tokenContract.copyWith(abi: jsonEncode(list));
// Store updated contract
final id = await MainDB.instance.putEthContract(updatedToken);
_tokenContract = updatedToken..id = id;
//--------------------------------------------------------------------
// final contractAddressResponse =
// await EthereumAPI.getProxyTokenImplementation(contractAddress.hex);
//
// if (contractAddressResponse.value != null) {
// _tokenContract = await _updateTokenABI(
// forContract: tokenContract,
// usingContractAddress: contractAddressResponse.value!,
// );
// } else {
// throw contractAddressResponse.exception!;
// }
//====================================================================
}
_deployedContract = web3dart.DeployedContract(
web3dart.ContractAbi.fromJson(
tokenContract.abi!,
tokenContract.name,
ContractAbiExtensions.fromJsonList(
jsonList: tokenContract.abi!,
name: tokenContract.name,
),
contractAddress,
);