deriveNode function

Implementation

Map<String, Object?> deriveNode(
    {required Map<String, Object?> source,
    String curve = 'secp256k1',
    String path = 'm'}) {
  final seed = _sourceSeed(source);
  if (curve == 'ed25519') {
    final node = Bip32Slip10Ed25519.fromSeed(seed)
        .derivePath(_path(path, ed25519: true));
    return {
      'schemaVersion': 1,
      'curve': curve,
      'path': path,
      'publicKeyHex':
          BytesUtils.toHexString(node.publicKey.compressed.sublist(1)),
      'chainCodeHex': BytesUtils.toHexString(node.chainCode.toBytes()),
      'depth': node.depth.toInt(),
      'childNumber': node.index.toInt()
    };
  }
  if (curve != 'secp256k1') {
    throw WalletHDDerivationException('unsupported curve: $curve');
  }
  final node = Bip32Slip10Secp256k1.fromSeed(seed).derivePath(_path(path));
  return {
    'schemaVersion': 1,
    'curve': curve,
    'path': path,
    'publicKeyHex': BytesUtils.toHexString(node.publicKey.compressed),
    'chainCodeHex': BytesUtils.toHexString(node.chainCode.toBytes()),
    'depth': node.depth.toInt(),
    'childNumber': node.index.toInt()
  };
}