mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-11-05 20:07:44 +00:00
81 lines
2.6 KiB
Dart
81 lines
2.6 KiB
Dart
import 'package:bip32/bip32.dart' as bip32;
|
|
import 'package:bip39/bip39.dart' as bip39;
|
|
import 'package:decimal/decimal.dart';
|
|
import "package:hex/hex.dart";
|
|
import 'package:stackwallet/utilities/amount/amount.dart';
|
|
import 'package:stackwallet/utilities/constants.dart';
|
|
import 'package:stackwallet/utilities/enums/coin_enum.dart';
|
|
|
|
class GasTracker {
|
|
final Decimal average;
|
|
final Decimal fast;
|
|
final Decimal slow;
|
|
|
|
final int numberOfBlocksFast;
|
|
final int numberOfBlocksAverage;
|
|
final int numberOfBlocksSlow;
|
|
|
|
final String lastBlock;
|
|
|
|
const GasTracker({
|
|
required this.average,
|
|
required this.fast,
|
|
required this.slow,
|
|
required this.numberOfBlocksFast,
|
|
required this.numberOfBlocksAverage,
|
|
required this.numberOfBlocksSlow,
|
|
required this.lastBlock,
|
|
});
|
|
|
|
factory GasTracker.fromJson(Map<String, dynamic> json) {
|
|
final targetTime = Constants.targetBlockTimeInSeconds(Coin.ethereum);
|
|
return GasTracker(
|
|
fast: Decimal.parse(json["FastGasPrice"].toString()),
|
|
average: Decimal.parse(json["ProposeGasPrice"].toString()),
|
|
slow: Decimal.parse(json["SafeGasPrice"].toString()),
|
|
// TODO fix hardcoded
|
|
numberOfBlocksFast: 30 ~/ targetTime,
|
|
numberOfBlocksAverage: 180 ~/ targetTime,
|
|
numberOfBlocksSlow: 240 ~/ targetTime,
|
|
lastBlock: json["LastBlock"] as String,
|
|
);
|
|
}
|
|
}
|
|
|
|
const hdPathEthereum = "m/44'/60'/0'/0";
|
|
|
|
// equal to "0x${keccak256("Transfer(address,address,uint256)".toUint8ListFromUtf8).toHex}";
|
|
const kTransferEventSignature =
|
|
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef";
|
|
|
|
String getPrivateKey(String mnemonic, String mnemonicPassphrase) {
|
|
final isValidMnemonic = bip39.validateMnemonic(mnemonic);
|
|
if (!isValidMnemonic) {
|
|
throw 'Invalid mnemonic';
|
|
}
|
|
|
|
final seed = bip39.mnemonicToSeed(mnemonic, passphrase: mnemonicPassphrase);
|
|
final root = bip32.BIP32.fromSeed(seed);
|
|
const index = 0;
|
|
final addressAtIndex = root.derivePath("$hdPathEthereum/$index");
|
|
|
|
return HEX.encode(addressAtIndex.privateKey as List<int>);
|
|
}
|
|
|
|
Amount estimateFee(int feeRate, int gasLimit, int decimals) {
|
|
final gweiAmount = feeRate.toDecimal() / (Decimal.ten.pow(9).toDecimal());
|
|
final fee = gasLimit.toDecimal() *
|
|
gweiAmount.toDecimal(
|
|
scaleOnInfinitePrecision: Coin.ethereum.decimals,
|
|
);
|
|
|
|
//Convert gwei to ETH
|
|
final feeInWei = fee * Decimal.ten.pow(9).toDecimal();
|
|
final ethAmount = feeInWei / Decimal.ten.pow(decimals).toDecimal();
|
|
return Amount.fromDecimal(
|
|
ethAmount.toDecimal(
|
|
scaleOnInfinitePrecision: Coin.ethereum.decimals,
|
|
),
|
|
fractionDigits: decimals,
|
|
);
|
|
}
|