fetchSelectorOpenChain method

Implementation

Future<ExternalContractFunction?> fetchSelectorOpenChain(
  String selector,
) async {
  selector = selector.startsWith("0x") ? selector : "0x$selector";

  final endpoint =
      "$_openchainEndpoint/lookup?function=$selector&filter=true";
  final uri = Uri.parse(endpoint);

  if (functionCache.containsKey(endpoint)) {
    return await functionCache[endpoint]!.future;
  }

  final future = _openchainRequest(uri, selector);

  final completer = Completer<ExternalContractFunction?>();
  functionCache[endpoint] = completer;
  try {
    final function = await future;
    completer.complete(function);
    return function;
  } catch (e) {
    completer.complete(null);
    return null;
  }
}