mnemonicToSeed function
Implementation
Uint8List mnemonicToSeed(String mnemonic) {
/// Normalize the case and spacing in the mnemonic (throws if the mnemonic is invalid)
final wordsList = mnemonic.split(' ');
wordsList.removeWhere((word) => word == '');
mnemonic = wordsList.join(' ');
if (!bip39.validateMnemonic(mnemonic)) {
throw 'invalid mnemonic';
}
final seed = bip39.mnemonicToSeed(mnemonic);
return seed;
}