listDerivativeExchanges method

Future<CoinGeckoResult<List<DerivativeExchange>>> listDerivativeExchanges({ String order = DerivativeExchangesOrder.nameAscending, int? itemsPerPage, int? page, })

List all derivative exchanges.

order sets results order. Use DerivativeExchangesOrder enumeration as values. Default is DerivativeExchangesOrder.nameAscending.

itemsPerPage sets total results per page.

page sets page through results.

Query path: /derivatives/exchanges

Implementation

Future<CoinGeckoResult<List<DerivativeExchange>>> listDerivativeExchanges({
  String order = DerivativeExchangesOrder.nameAscending,
  int? itemsPerPage,
  int? page,
}) async {
  final Map<String, dynamic> queryParameters = {
    'order': order,
  };
  if (itemsPerPage is int) {
    queryParameters['per_page'] = itemsPerPage;
  }
  if (page is int) {
    queryParameters['page'] = page;
  }
  final response = await _client.dio.get(
    '/derivatives/exchanges',
    queryParameters: queryParameters,
  );
  if (response.statusCode == 200) {
    final data = Convert.toList(response.data, []);
    final list = data.map((e) => DerivativeExchange.fromJson(e)).toList();
    return CoinGeckoResult(list);
  } else {
    return CoinGeckoResult(
      [],
      errorCode: response.statusCode ?? null,
      errorMessage: '${response.statusMessage} - ${response.data.toString()}',
      isError: true,
    );
  }
}