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WIP: Add transaction fees

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This commit is contained in:
likho 2023-01-12 16:14:49 +02:00
parent 734a51f5dd
commit ab4392b0bd
1 changed files with 44 additions and 20 deletions
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64
lib/services/coins/ethereum/ethereum_wallet.dart
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@ -14,6 +14,7 @@ import 'package:stackwallet/services/price.dart';
import 'package:stackwallet/services/transaction_notification_tracker.dart';
import 'package:stackwallet/utilities/constants.dart';
import 'package:stackwallet/utilities/enums/coin_enum.dart';
import 'package:stackwallet/utilities/enums/fee_rate_type_enum.dart';
import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';
import 'package:stackwallet/utilities/format.dart';
import 'package:stackwallet/utilities/prefs.dart';
@ -72,7 +73,7 @@ class AddressTransaction {
class GasTracker {
final int code;
final String data;
final Map<String, dynamic> data;
const GasTracker({
required this.code,
@ -82,13 +83,14 @@ class GasTracker {
factory GasTracker.fromJson(Map<String, dynamic> json) {
return GasTracker(
code: json['code'] as int,
data: json['data'] as String,
data: json['data'] as Map<String, dynamic>,
);
}
}
class EthereumWallet extends CoinServiceAPI {
NodeModel? _ethNode;
final _gasLimit = 21000;
@override
set isFavorite(bool markFavorite) {
@ -197,14 +199,17 @@ class EthereumWallet extends CoinServiceAPI {
final gasPrice = await _client.getGasPrice();
final int chainId = await _client.getNetworkId();
print("GAS PRICE IS $gasPrice");
print("AMOUNT TO SEND IS ${txData['fee']}");
final amount = txData['recipientAmt'];
final decimalAmount =
Format.satoshisToAmount(amount as int, coin: Coin.ethereum);
final bigIntAmount = amountToBigInt(decimalAmount.toDouble());
final tx = Transaction.Transaction(
to: EthereumAddress.fromHex(txData['address'] as String),
gasPrice: gasPrice,
maxGas: 21000,
gasPrice: EtherAmount.fromUnitAndValue(EtherUnit.gwei, txData['fee']),
maxGas: _gasLimit,
value: EtherAmount.inWei(bigIntAmount));
final transaction =
await _client.sendTransaction(_credentials, tx, chainId: chainId);
@ -228,10 +233,14 @@ class EthereumWallet extends CoinServiceAPI {
@override
Future<int> estimateFeeFor(int satoshiAmount, int feeRate) async {
print("CALLING ESTIMATE FEE");
// TODO: implement estimateFeeFor
// throw UnimplementedError();
return 1;
final gweiAmount = feeRate / (pow(10, 9));
final fee = _gasLimit * gweiAmount;
//Convert gwei to ETH
final feeInWei = fee * (pow(10, 9));
final ethAmount = feeInWei / (pow(10, 18));
return Format.decimalAmountToSatoshis(
Decimal.parse(ethAmount.toString()), coin);
}
@override
@ -248,16 +257,14 @@ class EthereumWallet extends CoinServiceAPI {
Future<FeeObject> _getFees() async {
GasTracker fees = await getGasOracle();
if (fees.code == 200) {
print("FEES IS ${fees.data}");
}
final feesMap = fees.data;
return FeeObject(
numberOfBlocksFast: 10,
numberOfBlocksAverage: 10,
numberOfBlocksSlow: 10,
fast: 1,
medium: 1,
slow: 1);
numberOfBlocksFast: 3,
numberOfBlocksAverage: 3,
numberOfBlocksSlow: 1,
fast: feesMap['fast'] as int,
medium: feesMap['standard'] as int,
slow: feesMap['slow'] as int);
}
Future<GasTracker> getGasOracle() async {
@ -410,12 +417,29 @@ class EthereumWallet extends CoinServiceAPI {
{required String address,
required int satoshiAmount,
Map<String, dynamic>? args}) async {
print("CALLING PREPARE SEND");
print(args);
final feeRateType = args?["feeRate"];
int fee = 0;
final feeObject = await fees;
switch (feeRateType) {
case FeeRateType.fast:
fee = feeObject.fast;
break;
case FeeRateType.average:
fee = feeObject.medium;
break;
case FeeRateType.slow:
fee = feeObject.slow;
break;
}
final feeEstimate = await estimateFeeFor(satoshiAmount, fee);
print("FEE ESTIMATE IS $feeEstimate");
final gasPrice = await _client.getGasPrice();
Map<String, dynamic> txData = {
"fee": Format.decimalAmountToSatoshis(
Decimal.parse(gasPrice.getValueInUnit(EtherUnit.ether).toString()),
coin),
"fee": feeEstimate,
"address": address,
"recipientAmt": satoshiAmount,
};