stack_wallet/lib/services/ethereum/ethereum_api.dart

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/*
* This file is part of Stack Wallet.
*
* Copyright (c) 2023 Cypher Stack
* All Rights Reserved.
* The code is distributed under GPLv3 license, see LICENSE file for details.
* Generated by Cypher Stack on 2023-05-26
*
*/
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import 'dart:convert';
import 'package:http/http.dart';
import 'package:stackwallet/dto/ethereum/eth_token_tx_dto.dart';
import 'package:stackwallet/dto/ethereum/eth_token_tx_extra_dto.dart';
import 'package:stackwallet/dto/ethereum/eth_tx_dto.dart';
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import 'package:stackwallet/dto/ethereum/pending_eth_tx_dto.dart';
import 'package:stackwallet/models/isar/models/ethereum/eth_contract.dart';
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import 'package:stackwallet/models/paymint/fee_object_model.dart';
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import 'package:stackwallet/utilities/amount/amount.dart';
import 'package:stackwallet/utilities/default_nodes.dart';
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import 'package:stackwallet/utilities/eth_commons.dart';
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import 'package:stackwallet/utilities/extensions/extensions.dart';
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import 'package:stackwallet/utilities/logger.dart';
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import 'package:tuple/tuple.dart';
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class EthApiException implements Exception {
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EthApiException(this.message);
final String message;
@override
String toString() => "$runtimeType: $message";
}
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class EthereumResponse<T> {
EthereumResponse(this.value, this.exception);
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final T? value;
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final EthApiException? exception;
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@override
toString() => "EthereumResponse: { value: $value, exception: $exception }";
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}
abstract class EthereumAPI {
static String get stackBaseServer => DefaultNodes.ethereum.host;
static Future<EthereumResponse<List<EthTxDTO>>> getEthTransactions({
required String address,
int firstBlock = 0,
bool includeTokens = false,
}) async {
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try {
final response = await get(
Uri.parse(
"$stackBaseServer/export?addrs=$address&firstBlock=$firstBlock",
),
);
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if (response.statusCode == 200) {
if (response.body.isNotEmpty) {
final json = jsonDecode(response.body) as Map;
final list = json["data"] as List?;
final List<EthTxDTO> txns = [];
for (final map in list!) {
final txn = EthTxDTO.fromMap(Map<String, dynamic>.from(map as Map));
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if (txn.hasToken == 0 || includeTokens) {
txns.add(txn);
}
}
return EthereumResponse(
txns,
null,
);
} else {
// nice that the api returns an empty body instead of being
// consistent and returning a json object with no transactions
return EthereumResponse(
[],
null,
);
}
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} else {
throw EthApiException(
"getEthTransactions($address) failed with status code: "
"${response.statusCode}",
);
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}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
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} catch (e, s) {
Logging.instance.log(
"getEthTransactions($address): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
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}
}
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static Future<EthereumResponse<PendingEthTxDto>> getEthTransactionByHash(
String txid) async {
try {
final response = await post(
Uri.parse(
"$stackBaseServer/v1/mainnet",
),
headers: {'Content-Type': 'application/json'},
body: json.encode({
"jsonrpc": "2.0",
"method": "eth_getTransactionByHash",
"params": [
txid,
],
"id": DateTime.now().millisecondsSinceEpoch,
}),
);
if (response.statusCode == 200) {
if (response.body.isNotEmpty) {
try {
final json = jsonDecode(response.body) as Map;
final result = json["result"] as Map;
return EthereumResponse(
PendingEthTxDto.fromMap(Map<String, dynamic>.from(result)),
null,
);
} catch (_) {
throw EthApiException(
"getEthTransactionByHash($txid) failed with response: "
"${response.body}",
);
}
} else {
throw EthApiException(
"getEthTransactionByHash($txid) response is empty but status code is "
"${response.statusCode}",
);
}
} else {
throw EthApiException(
"getEthTransactionByHash($txid) failed with status code: "
"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
"getEthTransactionByHash($txid): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
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static Future<EthereumResponse<List<Tuple2<EthTxDTO, int?>>>>
getEthTransactionNonces(
List<EthTxDTO> txns,
) async {
try {
final response = await get(
Uri.parse(
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"$stackBaseServer/transactions?transactions=${txns.map((e) => e.hash).join(" ")}&raw=true",
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),
);
if (response.statusCode == 200) {
if (response.body.isNotEmpty) {
final json = jsonDecode(response.body) as Map;
final list = List<Map<String, dynamic>>.from(json["data"] as List);
final List<Tuple2<EthTxDTO, int?>> result = [];
for (final dto in txns) {
final data =
list.firstWhere((e) => e["hash"] == dto.hash, orElse: () => {});
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final nonce = (data["nonce"] as String?)?.toBigIntFromHex.toInt();
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result.add(Tuple2(dto, nonce));
}
return EthereumResponse(
result,
null,
);
} else {
// nice that the api returns an empty body instead of being
// consistent and returning a json object with no transactions
return EthereumResponse(
[],
null,
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);
}
} else {
throw EthApiException(
"getEthTransactionNonces($txns) failed with status code: "
"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
"getEthTransactionNonces($txns): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
static Future<EthereumResponse<List<EthTokenTxExtraDTO>>>
getEthTokenTransactionsByTxids(List<String> txids) async {
try {
final response = await get(
Uri.parse(
"$stackBaseServer/transactions?transactions=${txids.join(" ")}",
),
);
if (response.statusCode == 200) {
if (response.body.isNotEmpty) {
final json = jsonDecode(response.body) as Map;
final list = json["data"] as List?;
final List<EthTokenTxExtraDTO> txns = [];
for (final map in list!) {
final txn = EthTokenTxExtraDTO.fromMap(
Map<String, dynamic>.from(map as Map),
);
txns.add(txn);
}
return EthereumResponse(
txns,
null,
);
} else {
throw EthApiException(
"getEthTokenTransactionsByTxids($txids) response is empty but status code is "
"${response.statusCode}",
);
}
} else {
throw EthApiException(
"getEthTokenTransactionsByTxids($txids) failed with status code: "
"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
"getEthTokenTransactionsByTxids($txids): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
static Future<EthereumResponse<List<EthTokenTxDto>>> getTokenTransactions({
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required String address,
required String tokenContractAddress,
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}) async {
try {
final response = await get(
Uri.parse(
"$stackBaseServer/export?addrs=$address&emitter=$tokenContractAddress&logs=true",
),
);
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if (response.statusCode == 200) {
if (response.body.isNotEmpty) {
final json = jsonDecode(response.body) as Map;
final list = json["data"] as List?;
final List<EthTokenTxDto> txns = [];
for (final map in list!) {
final txn =
EthTokenTxDto.fromMap(Map<String, dynamic>.from(map as Map));
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txns.add(txn);
}
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return EthereumResponse(
txns,
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null,
);
} else {
// nice that the api returns an empty body instead of being
// consistent and returning a json object with no transactions
return EthereumResponse(
[],
null,
);
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}
} else {
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throw EthApiException(
"getTokenTransactions($address, $tokenContractAddress) failed with status code: "
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"${response.statusCode}",
);
}
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} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
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} catch (e, s) {
Logging.instance.log(
"getTokenTransactions($address, $tokenContractAddress): $e\n$s",
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level: LogLevel.Error,
);
return EthereumResponse(
null,
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EthApiException(e.toString()),
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);
}
}
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// ONLY FETCHES WALLET TOKENS WITH A NON ZERO BALANCE
// static Future<EthereumResponse<List<EthToken>>> getWalletTokens({
// required String address,
// }) async {
// try {
// final uri = Uri.parse(
// "$blockExplorer?module=account&action=tokenlist&address=$address",
// );
// final response = await get(uri);
//
// if (response.statusCode == 200) {
// final json = jsonDecode(response.body);
// if (json["message"] == "OK") {
// final result =
// List<Map<String, dynamic>>.from(json["result"] as List);
// final List<EthToken> tokens = [];
// for (final map in result) {
// if (map["type"] == "ERC-20") {
// tokens.add(
// Erc20Token(
// balance: int.parse(map["balance"] as String),
// contractAddress: map["contractAddress"] as String,
// decimals: int.parse(map["decimals"] as String),
// name: map["name"] as String,
// symbol: map["symbol"] as String,
// ),
// );
// } else if (map["type"] == "ERC-721") {
// tokens.add(
// Erc721Token(
// balance: int.parse(map["balance"] as String),
// contractAddress: map["contractAddress"] as String,
// decimals: int.parse(map["decimals"] as String),
// name: map["name"] as String,
// symbol: map["symbol"] as String,
// ),
// );
// } else {
// throw EthApiException(
// "Unsupported token type found: ${map["type"]}");
// }
// }
//
// return EthereumResponse(
// tokens,
// null,
// );
// } else {
// throw EthApiException(json["message"] as String);
// }
// } else {
// throw EthApiException(
// "getWalletTokens($address) failed with status code: "
// "${response.statusCode}",
// );
// }
// } on EthApiException catch (e) {
// return EthereumResponse(
// null,
// e,
// );
// } catch (e, s) {
// Logging.instance.log(
// "getWalletTokens(): $e\n$s",
// level: LogLevel.Error,
// );
// return EthereumResponse(
// null,
// EthApiException(e.toString()),
// );
// }
// }
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static Future<EthereumResponse<Amount>> getWalletTokenBalance({
required String address,
required String contractAddress,
}) async {
try {
final uri = Uri.parse(
"$stackBaseServer/tokens?addrs=$contractAddress $address",
);
final response = await get(uri);
if (response.statusCode == 200) {
final json = jsonDecode(response.body);
if (json["data"] is List) {
final map = json["data"].first as Map;
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final balance =
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BigInt.tryParse(map["units"].toString()) ?? BigInt.zero;
return EthereumResponse(
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Amount(rawValue: balance, fractionDigits: map["decimals"] as int),
null,
);
} else {
throw EthApiException(json["message"] as String);
}
} else {
throw EthApiException(
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"getWalletTokenBalance($address) failed with status code: "
"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
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null,
e,
);
} catch (e, s) {
Logging.instance.log(
"getWalletTokenBalance(): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
static Future<EthereumResponse<int>> getAddressNonce({
required String address,
}) async {
try {
final uri = Uri.parse(
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"$stackBaseServer/state?addrs=$address&parts=all",
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);
final response = await get(uri);
if (response.statusCode == 200) {
final json = jsonDecode(response.body);
if (json["data"] is List) {
final map = json["data"].first as Map;
final nonce = map["nonce"] as int;
return EthereumResponse(
nonce,
null,
);
} else {
throw EthApiException(json["message"] as String);
}
} else {
throw EthApiException(
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"getAddressNonce($address) failed with status code: "
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"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
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"getAddressNonce(): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
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static Future<EthereumResponse<GasTracker>> getGasOracle() async {
try {
final response = await get(
Uri.parse(
"$stackBaseServer/gas-prices",
),
);
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if (response.statusCode == 200) {
final json = jsonDecode(response.body) as Map;
if (json["success"] == true) {
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try {
return EthereumResponse(
GasTracker.fromJson(
Map<String, dynamic>.from(json["result"]["result"] as Map),
),
null,
);
} catch (_) {
throw EthApiException(
"getGasOracle() failed with response: "
"${response.body}",
);
}
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} else {
throw EthApiException(
"getGasOracle() failed with response: "
"${response.body}",
);
}
} else {
throw EthApiException(
"getGasOracle() failed with status code: "
"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
"getGasOracle(): $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
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}
}
static Future<FeeObject> getFees() async {
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final fees = (await getGasOracle()).value!;
final feesFast = fees.fast.shift(9).toBigInt();
final feesStandard = fees.average.shift(9).toBigInt();
final feesSlow = fees.slow.shift(9).toBigInt();
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return FeeObject(
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numberOfBlocksFast: fees.numberOfBlocksFast,
numberOfBlocksAverage: fees.numberOfBlocksAverage,
numberOfBlocksSlow: fees.numberOfBlocksSlow,
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fast: feesFast.toInt(),
medium: feesStandard.toInt(),
slow: feesSlow.toInt());
}
static Future<EthereumResponse<EthContract>> getTokenContractInfoByAddress(
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String contractAddress) async {
try {
final response = await get(
Uri.parse(
"$stackBaseServer/tokens?addrs=$contractAddress&parts=all",
),
);
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if (response.statusCode == 200) {
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final json = jsonDecode(response.body) as Map;
if (json["data"] is List) {
final map = Map<String, dynamic>.from(json["data"].first as Map);
EthContract? token;
if (map["isErc20"] == true) {
token = EthContract(
address: map["address"] as String,
decimals: map["decimals"] as int,
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name: map["name"] as String,
symbol: map["symbol"] as String,
type: EthContractType.erc20,
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);
} else if (map["isErc721"] == true) {
token = EthContract(
address: map["address"] as String,
decimals: map["decimals"] as int,
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name: map["name"] as String,
symbol: map["symbol"] as String,
type: EthContractType.erc721,
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);
} else {
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throw EthApiException(
"Unsupported token type found: ${map["type"]}");
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}
return EthereumResponse(
token,
null,
);
} else {
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throw EthApiException(response.body);
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}
} else {
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throw EthApiException(
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"getTokenByContractAddress($contractAddress) failed with status code: "
"${response.statusCode}",
);
}
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} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
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} catch (e, s) {
Logging.instance.log(
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"getTokenByContractAddress(): $e\n$s",
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level: LogLevel.Error,
);
return EthereumResponse(
null,
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EthApiException(e.toString()),
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);
}
}
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static Future<EthereumResponse<String>> getTokenAbi({
required String name,
required String contractAddress,
}) async {
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try {
final response = await get(
Uri.parse(
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"$stackBaseServer/abis?addrs=$contractAddress&verbose=true",
),
);
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if (response.statusCode == 200) {
final json = jsonDecode(response.body)["data"] as List;
return EthereumResponse(
jsonEncode(json),
null,
);
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} else {
throw EthApiException(
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"getTokenAbi($name, $contractAddress) failed with status code: "
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"${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
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"getTokenAbi($name, $contractAddress): $e\n$s",
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level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
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/// Fetch the underlying contract address that a proxy contract points to
static Future<EthereumResponse<String>> getProxyTokenImplementationAddress(
String contractAddress,
) async {
try {
final response = await get(Uri.parse(
"$stackBaseServer/state?addrs=$contractAddress&parts=proxy"));
if (response.statusCode == 200) {
final json = jsonDecode(response.body);
final list = json["data"] as List;
final map = Map<String, dynamic>.from(list.first as Map);
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return EthereumResponse(
map["proxy"] as String,
null,
);
} else {
throw EthApiException(
"getProxyTokenImplementationAddress($contractAddress) failed with"
" status code: ${response.statusCode}",
);
}
} on EthApiException catch (e) {
return EthereumResponse(
null,
e,
);
} catch (e, s) {
Logging.instance.log(
"getProxyTokenImplementationAddress($contractAddress) : $e\n$s",
level: LogLevel.Error,
);
return EthereumResponse(
null,
EthApiException(e.toString()),
);
}
}
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}