carteira

Crypto wallet package for Bitcoin, Ethereum and Tron written in pure Dart.

Getting started

In your pubspec.yaml file add:

dependencies:
  wallet: any

Usage

Create Tron address from Mnemonic and Passphrase

import 'package:wallet/wallet.dart' as wallet;

final mnemonic = '<YOUR MNEMONIC>';
final passphrase = '';

final seed = wallet.mnemonicToSeed(mnemonic, passphrase: passphrase);
final master = wallet.ExtendedPrivateKey.master(seed, wallet.xprv);
final root = master.forPath("m/44'/195'/0'/0/0");

final privateKey = wallet.PrivateKey((root as wallet.ExtendedPrivateKey).key);
final publicKey = wallet.tron.createPublicKey(privateKey);
final address = wallet.tron.createAddress(publicKey);

print(address);

Validate a Tron address

import 'package:wallet/wallet.dart' as wallet;

const address = 'TCB9WxaRSMEXiVaVys9DEAXbRc6JNuKpjA';
final isValid = wallet.isValidTronAddress(address);

print(isValid); // True

Validate an Ethereum address

import 'package:wallet/wallet.dart' as wallet;

const ethAddress = '0x52908400098527886E0F7030069857D2E4169EE7';
// Verify EIP-55 checksum (accepts lowercase or uppercase as valid)
final isValidEth = wallet.EthereumAddress.isEip55ValidEthereumAddress(ethAddress);
print(isValidEth); // True

// Parse and optionally enforce checksum
final address = wallet.EthereumAddress.fromHex(
  ethAddress,
  enforceEip55: true,
);
print(address); // Mixed-case checksummed address without 0x prefix