Same wallet in my flutter app and phantom wallet

[sistemaseltigre]

guys, i have a problem with my code to generate polygon and eth wallet, im using web3dart at flutter to generate a new wallet and in my apps it's work, but when i try to get the same publickey wallets in phantom wallet importin seed phrase i get differents publickeys, u can help me with this? im generating a new wallet to eth with this code:

`
@OverRide
Future getWallet() async {
try {
final random = Random.secure();
EthereumAddress address;
EtherAmount amount;

  configureClient();
  await storage.ready;

  EthPrivateKey privateKey;

  final mnemonicStorage = await storage.getItem('mnemonic');

  if (mnemonicStorage != null) {
    final seedPhrase = bip39.mnemonicToSeed(mnemonicStorage.toString());
    privateKey = EthPrivateKey(seedPhrase);
  } else {
    final mnemonic = bip39.generateMnemonic();
    final seedPhrase = bip39.mnemonicToSeed(mnemonic);
    privateKey = EthPrivateKey(seedPhrase);
    await storage.setItem('mnemonic', mnemonic);
  }
  final seedPhrase = bip39.mnemonicToSeed(mnemonicStorage.toString());
  EthPrivateKey privateKey = EthPrivateKey(seedPhrase);

  if (mnemonicStorage == null) {
    final mnemonic = bip39.generateMnemonic();
    mnemonicStorage = mnemonic;

    final seedPhrase = bip39.mnemonicToSeed(mnemonic);
    privateKey = EthPrivateKey(seedPhrase);
    await storage.setItem('mnemonic', mnemonic);
  }

  address = privateKey.address;
  amount = (await client.getBalance(address));

  return Ethereum(
      address: address.toString(), balance: amount.getInEther.toString());
} catch (e) {
  return Ethereum(address: '', balance: '0');
}

}
`

for example my mnemonic is:
shiver exact obey noodle shaft finish view loan hurt found letter menu

[adamdelphantom]

Hey @sistemaseltigre,

Thanks for writing in!

It appears you are using BIP39 as a derivation path to generate your mnemonic. Phantom uses the BIP44 derivation path. I would recommend checking to see if the library you're using has that as an option.

https://help.phantom.app/hc/en-us/articles/12988493966227-What-derivation-paths-does-Phantom-wallet-support-

[sistemaseltigre]

Guys using Flutter/dart

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

final normalisedSeedPhrase = this._seedPhraseNormalise(seedPhrase);
final String cryptMnemonic = bip39.mnemonicToEntropy(normalisedSeedPhrase);
final String privateKey = this.getPrivateKey(normalisedSeedPhrase: normalisedSeedPhrase);
final address = await this.getPublicAddress(privateKey);
debugPrint("pubKey = $address");
debugPrint("privKey = $privateKey");
`

`
String getPrivateKey({required String normalisedSeedPhrase}) {
var seed = bip39.mnemonicToSeed(normalisedSeedPhrase);
final hdWallet = new HDWallet.fromSeed(seed).derivePath("m/44'/60'/0'/0/0");
final String? privKey = hdWallet.privKey;
assert(privKey != null);
return privKey ?? "";
}

String _seedPhraseNormalise(String seedPhrase) {
return _mnemonicWords(seedPhrase).join(" ");
}

List _mnemonicWords(String mnemonic) {
return mnemonic
.split(" ")
.where((item) => item.trim().isNotEmpty)
.map((item) => item.trim())
.toList();
}

Future getPublicAddress(String privateKey) async {
final private = EthPrivateKey.fromHex(privateKey);
final address = await private.extractAddress();
return address;
}
`