getTransactionChain method

Future<Map<String, List<Transaction>>> getTransactionChain(Map<String, String> addresses, { String request = Transaction.kTransactionQueryAllFields, bool orderAsc = true, int? fromCriteria, })

Query the network to find transaction chains from a map of addresses and pagingAddress Returns the content scalar type represents transaction content List<Transaction>. Depending if the content can displayed it will be rendered as plain text otherwise in hexadecimal

Implementation

Future<Map<String, List<Transaction>>> getTransactionChain(
  Map<String, String> addresses, {
  String request = Transaction.kTransactionQueryAllFields,
  bool orderAsc = true,
  int? fromCriteria,
}) async {
  if (addresses.isEmpty) {
    return {};
  }

  final order = orderAsc == true ? 'ASC ' : 'DESC';

  final fragment = 'fragment fields on Transaction { $request }';
  final body = StringBuffer()..write('query { ');
  // TODO(reddwarf03): Not good the '_' system to define alias but address format is not accepted by graphQL
  addresses.forEach((key, value) {
    body.write(' _$key: transactionChain(address:"$key" ');
    body.write(' order: $order ');
    if (value.isNotEmpty) {
      body.write(' pagingAddress:"$value"');
    }
    if (fromCriteria != null) {
      body.write(' from:$fromCriteria');
    }

    body.write(') { ...fields }');
  });
  body.write('} $fragment');

  final result = await _client
      .withLogger(
        'getTransactionChain',
      )
      .query(
        QueryOptions(
          document: gql(body.toString()),
          parserFn: (object) {
            final transactions = object.mapValues(
              (transactions) => (transactions as List<dynamic>)
                  .map(
                    (transaction) => Transaction.fromJson(
                      transaction as Map<String, dynamic>,
                    ),
                  )
                  .toList(),
              keysToIgnore: _responseKeysToIgnore,
            );
            return removeAliasPrefix<List<Transaction>>(transactions) ?? {};
          },
        ),
      );

  manageLinkException(result);

  return result.parsedData ?? {};
}