prepareRenew method

Uint8List prepareRenew({ SealdGeneratedPrivateKeys? privateKeys, })

Prepare a private key renewal, so it can be stored on SSKS without risk of loss during the actual renew

privateKeys - Optional. Pre-generated private keys, returned by a call to SealdSdk.generatePrivateKeysAsync.

Returns a Uint8List containing a prepared renewal.

Implementation

Uint8List prepareRenew({SealdGeneratedPrivateKeys? privateKeys}) {
  if (_closed) {
    throw SealdException(
        code: "INSTANCE_CLOSED",
        id: "FLUTTER_INSTANCE_CLOSED",
        description: "Instance already closed.");
  }
  final Pointer<Utf8> nativeEncryptionKey =
      privateKeys?.encryptionKey.toNativeUtf8() ?? nullptr;
  final Pointer<Utf8> nativeSigningKey =
      privateKeys?.signingKey.toNativeUtf8() ?? nullptr;
  final Pointer<Pointer<Uint8>> result = calloc<Pointer<Uint8>>();
  final Pointer<Int> resultLen = calloc<Int>();
  final Pointer<Pointer<NativeSealdError>> err =
      calloc<Pointer<NativeSealdError>>();

  final int resultCode = _bindings.SealdSdk_PrepareRenew(_ptr.pointer(),
      nativeEncryptionKey, nativeSigningKey, result, resultLen, err);

  calloc.free(nativeEncryptionKey);
  calloc.free(nativeSigningKey);
  if (resultCode != 0) {
    calloc.free(result);
    calloc.free(resultLen);
    throw SealdException._fromCPtr(err);
  } else {
    final Uint8List cPreparedRenew =
        result.value.asTypedList(resultLen.value);
    // Copying the data in a Dart-created Uint8List, to avoid having to free memory later
    final Uint8List res = Uint8List.fromList(cPreparedRenew);
    calloc.free(result.value);
    calloc.free(result);
    calloc.free(resultLen);
    calloc.free(err);
    return res;
  }
}