multi_chain_wallet

Pure Dart mnemonic-based wallet derivation for multiple chains.

Supported chains

• bitcoin - legacy P2PKH (1...)
• bitcoinSegwit - native SegWit / bech32 (bc1q...)
• dogecoin
• eth
• bnb
• tron
• xrpl - native XRP Ledger (r...)
• xrpEvm - EVM-style XRP address (0x...)
• solana
• sui - Ed25519 + Blake2b address (0x...)

Features

• Derive private key, public key, and address from a mnemonic
• Batch derivation across all supported chains
• Chain metadata lookup by chain id
• Pure Dart implementation with unit tests

Usage

import 'package:multi_chain_wallet/wallet_derivation.dart';

Future<void> main() async {
  const mnemonic =
      'baby pretty venture start report sick shuffle axis tube laugh cement train';

  final ethWallet = await MnemonicWallet.derive(
    mnemonic: mnemonic,
    chain: SupportedChain.eth,
  );

  final xrplWallet = await MnemonicWallet.derive(
    mnemonic: mnemonic,
    chain: SupportedChain.xrpl,
  );

  final canonical = SupportedChainX.fromChainId(60);
  final allFor60 = SupportedChainX.allForChainId(60);

  print(ethWallet.address);
  print(xrplWallet.address);
  print(canonical);
  print(allFor60);
}

Notes

• chainId in this package follows the BIP44 / SLIP-0044 coin type style used by derivation paths.
• Some chains share the same id. For example eth, bnb, and xrpEvm all map to 60.
• sui uses path m/44'/784'/0'/0'/0' and address 0x + blake2b-256(0x00 || publicKey).
• SupportedChainX.fromChainId returns the canonical default chain for that id.
• SupportedChainX.allForChainId returns every supported chain that shares the same id.

Publishing

Before publishing to pub.dev, make sure you also set:

• homepage
• repository
• issue_tracker
• a license file such as LICENSE

Then run:

dart pub publish --dry-run
dart pub publish