signTransaction method

@override Future<Map<String, dynamic>> signTransaction(dynamic transaction)

Send transaction objects to MyAlgo for approval. If approved, the response is an array of signed transaction objects, with the binary blob field base64 encoded to prevent transmission issues.

Implementation

@override
Future<Map<String, dynamic>> signTransaction(dynamic transaction) async {
  if (transaction is Map<String, dynamic>) {
    transaction = mapToJSObj(transaction);
  }
  var c = Completer<Map<String, dynamic>>();
  promiseToFuture(myAlgo.signTransaction([transaction])).then((value) {
    if (value is! List || value.isEmpty) {
      return c.completeError('Invalid transaction');
    }

    final transactions = value.map((tx) {
      final txId = getProperty(tx, 'txID') ?? '';
      final blob = getProperty(tx, 'blob') ?? [];

      return <String, dynamic>{
        'txId': txId,
        'blob': base64Encode(blob),
      };
    }).toList();

    return c.complete(transactions[0]);
  }).onError((error, stackTrace) => c.completeError(_handleError(error)));

  return c.future;
}