wallet_hd 0.0.4

A Flutter package project , it is use for HD wallet . Support BTC, ETH, ERC20-USDT transfer signature.

example/lib/main.dart

import 'package:wallet_hd/wallet_hd.dart';

void main() async {
  String mnemonic = WalletHd.createRandomMnemonic();
  Map<String, String> mapAddr = await WalletHd.getAccountAddress(mnemonic);
  String btcAddr = mapAddr["BTC"]!;
  String ethAddr = mapAddr["ETH"]!;
  String toAddress = "input the to address ...";
  String amount = "0.1";
  String? btcTxPack =
      await testTransactionBTC(mnemonic, btcAddr, toAddress, amount);
  String? ethTxPack =
      await testTransactionETH(mnemonic, ethAddr, toAddress, amount);
  String? erc20USDTTxPack =
      await testTransactionERC20USDT(mnemonic, ethAddr, toAddress, amount);
  print(btcTxPack);
  print(ethTxPack);
  print(erc20USDTTxPack);
}

Future<String?> testTransactionBTC(
  String mnemonic,
  String fromAddress,
  String toAddress,
  String amount,
) async {
  List<Map<String, dynamic>> unspandList = [
    {"txid": "0x12312313aaaaaaaaa", "output_no": 11, "value": "0.2323"},
    {"txid": "0x12312313bbbbbbbbb", "output_no": 12, "value": "0.2323"},
  ];
  List<Map<String, dynamic>> pendingList = [
    {"txid": "0x12312313aaaaaaaaa", "value": "0.2323"}
  ];
  double fee = 0.0002655;
  List<Map<String, dynamic>> handledUnspandList = List.from(unspandList);
  if (pendingList.isNotEmpty) {
    for (var e in pendingList) {
      handledUnspandList.removeWhere((x) => e["txid"] == x["txid"]);
    }
  }
  List<BitcoinIn> unspand = handledUnspandList
      .map((e) => BitcoinIn(
          e["txid"] as String, e["output_no"] as int, double.parse(e["value"] as String)))
      .toList();

  String? txPack = await WalletHd.transactionBTC(
      mnemonic, fromAddress, toAddress, amount, fee, unspand);
  print("btc txPack");
  print(txPack);
  return txPack;
}

Future<String?> testTransactionETH(
  String mnemonic,
  String fromAddress,
  String toAddress,
  String amount,
) async {
  String gasPrice = "113000000000";

  /// 新创建的账号初始none是-1 | the new account nonce is -1
  int nonce = -1;
  String? txPack = await WalletHd.transactionETH(
      mnemonic, fromAddress, toAddress, amount, gasPrice, nonce);
  print("eth txPack");
  print(txPack);
  return txPack;
}

Future<String?> testTransactionERC20USDT(
  String mnemonic,
  String fromAddress,
  String toAddress,
  String amount,
) async {
  String gasPrice = "113000000000";

  /// 新创建的账号初始none是-1 | the new account nonce is -1
  int nonce = -1;
  String? txPack = await WalletHd.transactionERC20USDT(
      mnemonic, fromAddress, toAddress, amount, gasPrice, nonce);
  print("eth txPack");
  print(txPack);
  return txPack;
}