privateKeyFromMnemonic static method
Derives a private key from a BIP-39 mnemonic using a given derivation path and passphrase.
mnemonic
- The BIP-39 mnemonic to derive the private key from.
derivationPath
- The derivation path to use (default "m/44'/60'/0'/0/").
childIndex
- The index of the child key to derive (default 0).
passphrase
- The optional passphrase to use when deriving the key (default "").
Returns a string representing the derived private key.
Implementation
static String privateKeyFromMnemonic(
String mnemonic, {
String derivationPath = "m/44'/60'/0'/0/",
int childIndex = 0,
String passphrase = "",
}) {
final String seed = bip39.mnemonicToSeedHex(
mnemonic,
passphrase: passphrase,
);
final bip32.BIP32 rootNode = bip32.BIP32.fromSeed(
HEX.decode(seed) as Uint8List,
);
final bip32.BIP32 childNode = rootNode.derivePath(
"$derivationPath$childIndex",
);
final String privateKey = HEX.encode(childNode.privateKey!);
return privateKey;
}