public Task <TransactionReceipt> RequestEthereumPriceRequestAndWaitForReceiptAsync(RequestEthereumPriceFunction requestEthereumPriceFunction, CancellationTokenSource cancellationToken = null)
 {
     return(ContractHandler.SendRequestAndWaitForReceiptAsync(requestEthereumPriceFunction, cancellationToken));
 }
 public Task <string> RequestEthereumPriceRequestAsync(RequestEthereumPriceFunction requestEthereumPriceFunction)
 {
     return(ContractHandler.SendRequestAsync(requestEthereumPriceFunction));
 }