stack_wallet/lib/wallets/crypto_currency/coins/ecash.dart
2024-04-15 13:22:30 -06:00

269 lines
7.7 KiB
Dart

import 'dart:typed_data';
import 'package:bech32/bech32.dart';
import 'package:bitbox/bitbox.dart' as bitbox;
import 'package:bs58check/bs58check.dart' as bs58check;
import 'package:coinlib_flutter/coinlib_flutter.dart' as coinlib;
import 'package:stackwallet/models/isar/models/blockchain_data/address.dart';
import 'package:stackwallet/models/node_model.dart';
import 'package:stackwallet/utilities/amount/amount.dart';
import 'package:stackwallet/utilities/default_nodes.dart';
import 'package:stackwallet/utilities/enums/coin_enum.dart';
import 'package:stackwallet/utilities/enums/derive_path_type_enum.dart';
import 'package:stackwallet/wallets/crypto_currency/crypto_currency.dart';
import 'package:stackwallet/wallets/crypto_currency/intermediate/bip39_hd_currency.dart';
class Ecash extends Bip39HDCurrency {
Ecash(super.network) {
switch (network) {
case CryptoCurrencyNetwork.main:
coin = Coin.eCash;
default:
throw Exception("Unsupported network: $network");
}
}
@override
int get maxUnusedAddressGap => 50;
@override
int get maxNumberOfIndexesToCheck => 10000000;
@override
// change this to change the number of confirms a tx needs in order to show as confirmed
int get minConfirms => 0; // bch zeroconf
@override
List<DerivePathType> get supportedDerivationPathTypes => [
DerivePathType.eCash44,
DerivePathType.bip44,
];
@override
String get genesisHash {
switch (network) {
case CryptoCurrencyNetwork.main:
return "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f";
case CryptoCurrencyNetwork.test:
return "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943";
default:
throw Exception("Unsupported network: $network");
}
}
@override
Amount get dustLimit => Amount(
rawValue: BigInt.from(546),
fractionDigits: fractionDigits,
);
@override
coinlib.Network get networkParams {
switch (network) {
case CryptoCurrencyNetwork.main:
return coinlib.Network(
wifPrefix: 0x80,
p2pkhPrefix: 0x00,
p2shPrefix: 0x05,
privHDPrefix: 0x0488ade4,
pubHDPrefix: 0x0488b21e,
bech32Hrp: "bc",
messagePrefix: '\x18Bitcoin Signed Message:\n',
minFee: BigInt.from(1), // TODO [prio=high].
minOutput: dustLimit.raw, // TODO.
feePerKb: BigInt.from(1), // TODO.
);
case CryptoCurrencyNetwork.test:
return coinlib.Network(
wifPrefix: 0xef,
p2pkhPrefix: 0x6f,
p2shPrefix: 0xc4,
privHDPrefix: 0x04358394,
pubHDPrefix: 0x043587cf,
bech32Hrp: "tb",
messagePrefix: "\x18Bitcoin Signed Message:\n",
minFee: BigInt.from(1), // TODO [prio=high].
minOutput: dustLimit.raw, // TODO.
feePerKb: BigInt.from(1), // TODO.
);
default:
throw Exception("Unsupported network: $network");
}
}
@override
String addressToScriptHash({required String address}) {
try {
if (bitbox.Address.detectFormat(address) ==
bitbox.Address.formatCashAddr &&
_validateCashAddr(address)) {
address = bitbox.Address.toLegacyAddress(address);
}
final addr = coinlib.Address.fromString(address, networkParams);
return Bip39HDCurrency.convertBytesToScriptHash(
addr.program.script.compiled);
} catch (e) {
rethrow;
}
}
@override
String constructDerivePath({
required DerivePathType derivePathType,
int account = 0,
required int chain,
required int index,
}) {
String coinType;
switch (networkParams.wifPrefix) {
case 0x80: // mainnet wif
switch (derivePathType) {
case DerivePathType.bip44:
coinType = "145";
break;
case DerivePathType.eCash44:
coinType = "899";
break;
default:
throw Exception(
"DerivePathType $derivePathType not supported for coinType");
}
break;
case 0xef: // testnet wif
throw Exception(
"DerivePathType $derivePathType not supported for coinType");
default:
throw Exception("Invalid ECash network wif used!");
}
int purpose;
switch (derivePathType) {
case DerivePathType.bip44:
case DerivePathType.eCash44:
purpose = 44;
break;
default:
throw Exception("DerivePathType $derivePathType not supported");
}
return "m/$purpose'/$coinType'/$account'/$chain/$index";
}
@override
({coinlib.Address address, AddressType addressType}) getAddressForPublicKey({
required coinlib.ECPublicKey publicKey,
required DerivePathType derivePathType,
}) {
switch (derivePathType) {
case DerivePathType.bip44:
case DerivePathType.eCash44:
final addr = coinlib.P2PKHAddress.fromPublicKey(
publicKey,
version: networkParams.p2pkhPrefix,
);
return (address: addr, addressType: AddressType.p2pkh);
default:
throw Exception("DerivePathType $derivePathType not supported");
}
}
@override
bool validateAddress(String address) {
try {
// 0 for bitcoincash: address scheme, 1 for legacy address
final format = bitbox.Address.detectFormat(address);
if (format == bitbox.Address.formatCashAddr) {
return _validateCashAddr(address);
} else {
return address.startsWith("1");
}
} catch (e) {
return false;
}
}
bool _validateCashAddr(String cashAddr) {
String addr = cashAddr;
if (cashAddr.contains(":")) {
addr = cashAddr.split(":").last;
}
return addr.startsWith("q") /*|| addr.startsWith("p")*/;
// Do not validate "p" (P2SH) addresses.
}
@override
DerivePathType addressType({required String address}) {
Uint8List? decodeBase58;
Segwit? decodeBech32;
try {
if (bitbox.Address.detectFormat(address) ==
bitbox.Address.formatCashAddr) {
if (_validateCashAddr(address)) {
address = bitbox.Address.toLegacyAddress(address);
} else {
throw ArgumentError('$address is not currently supported');
}
}
} catch (_) {
// invalid cash addr format
}
try {
decodeBase58 = bs58check.decode(address);
} catch (err) {
// Base58check decode fail
}
if (decodeBase58 != null) {
if (decodeBase58[0] == networkParams.p2pkhPrefix) {
// P2PKH
return DerivePathType.bip44;
}
if (decodeBase58[0] == networkParams.p2shPrefix) {
// P2SH
return DerivePathType.bip49;
}
throw ArgumentError('Invalid version or Network mismatch');
} else {
try {
decodeBech32 = segwit.decode(address);
} catch (err) {
// Bech32 decode fail
}
if (decodeBech32 != null) {
if (networkParams.bech32Hrp != decodeBech32.hrp) {
throw ArgumentError('Invalid prefix or Network mismatch');
}
if (decodeBech32.version != 0) {
throw ArgumentError('Invalid address version');
}
}
}
throw ArgumentError('$address has no matching Script');
}
@override
NodeModel get defaultNode {
switch (network) {
case CryptoCurrencyNetwork.main:
return NodeModel(
host: "electrum.bitcoinabc.org",
port: 50002,
name: DefaultNodes.defaultName,
id: DefaultNodes.buildId(Coin.eCash),
useSSL: true,
enabled: true,
coinName: Coin.eCash.name,
isFailover: true,
isDown: false,
);
default:
throw UnimplementedError();
}
}
}