public Task <string> GetExchangeQueryAsync(string token, BlockParameter blockParameter = null)
        {
            var getExchangeFunction = new GetExchangeFunction();

            getExchangeFunction.Token = token;

            return(ContractHandler.QueryAsync <GetExchangeFunction, string>(getExchangeFunction, blockParameter));
        }
 public Task <string> GetExchangeQueryAsync(GetExchangeFunction getExchangeFunction, BlockParameter blockParameter = null)
 {
     return(ContractHandler.QueryAsync <GetExchangeFunction, string>(getExchangeFunction, blockParameter));
 }