use monacoin

monacoin.dart

import 'package:bitcoin_flutter/bitcoin_flutter.dart';
import 'package:bip32/bip32.dart' as bip32;
import 'package:bip39/bip39.dart' as bip39;

final MONACOIN = new NetworkType(
  messagePrefix: '\x19Monacoin Signed Message:\n',
  bech32: 'mona',
  bip32: new Bip32Type(
    public: 0x0488b21e,
    private: 0x0488ade4
  ),
  pubKeyHash: 50,
  scriptHash: 55,
  wif: 178
);

main () {
  var mnemonic = "like like like like like like like like like like like like"; // your mnemonic phrase
  var seed = bip39.mnemonicToSeed(mnemonic);
  var masterWallet = new HDWallet.fromSeed(seed, network: MONACOIN);
  var node = masterWallet.derivePath("m/44'/22'/0'");
  print(node.derive(0).derive(0).address); // => MPb8dEsv7TuEoXKNSmBAyQXgPnuYByxbb2
}