nethereum-方法eth_feehistory不存在或不可用

Question

我使用Nethereum在区块链（虚拟机上的专用网络）上“写入”的函数。我被迫从3.8.0升级到版本4.5.0 在更新之前，一切正常，但是现在，当我调用sendtransactionandwaitforreceiptasync函数时，提出了以下异常。

Nethereum.JsonRpc.Client.RpcResponseException: the method eth_feeHistory does not exist/is not available: eth_feeHistory
   at Nethereum.JsonRpc.Client.ClientBase.HandleRpcError(RpcResponseMessage response, String reqMsg)
   at Nethereum.JsonRpc.Client.ClientBase.SendInnerRequestAsync[T](RpcRequestMessage reqMsg, String route)
   at Nethereum.JsonRpc.Client.ClientBase.SendRequestAsync[T](RpcRequest request, String route)
   at Nethereum.RPC.Fee1559Suggestions.TimePreferenceFeeSuggestionStrategy.SuggestFeesAsync()
   at Nethereum.RPC.Fee1559Suggestions.TimePreferenceFeeSuggestionStrategy.SuggestFeeAsync(Nullable`1 maxPriorityFeePerGas)
   at Nethereum.RPC.TransactionManagers.TransactionManagerBase.SetTransactionFeesOrPricingAsync(TransactionInput transaction)
   at Nethereum.Web3.Accounts.AccountSignerTransactionManager.SignTransactionRetrievingNextNonceAsync(TransactionInput transaction)
   at Nethereum.Web3.Accounts.AccountSignerTransactionManager.SignAndSendTransactionAsync(TransactionInput transaction)
   at Nethereum.RPC.TransactionReceipts.TransactionReceiptPollingService.SendRequestAndWaitForReceiptAsync(Func`1 transactionFunction, CancellationTokenSource tokenSource)
   at Project.BlockchainAdapter.BlockchainInteractionAdapter.Write(String privateKey, String contractAddress, String url, String smartContractLocation, String functionName, Object[] inputParameters, Int32 transactionValue, Int32 chainId)

那是代码：

public void Write(
      string privateKey,
      string contractAddress,
      string url,
      string smartContractLocation,
      string functionName,
      object[] inputParameters,
      int transactionValue = 0,
      int chainId = (int)Nethereum.Signer.Chain.Ropsten)
    {
      var function = GetEthFunction(privateKey, contractAddress, url, smartContractLocation, functionName, out Account account, chainId);

      var _transactionValue = new HexBigInteger(new BigInteger(transactionValue));
      var _estimatedGas = new HexBigInteger(new BigInteger(35000));
      try
      {
        _estimatedGas = function.EstimateGasAsync(
            account.Address,
            new HexBigInteger(new BigInteger(transactionValue)),
            new HexBigInteger(new BigInteger(transactionValue)),
            inputParameters).GetAwaiter().GetResult();
      }
      catch
      {
        // Intentionally left blank
      }

      var receipt = function.SendTransactionAndWaitForReceiptAsync(
            account.Address,
            _estimatedGas,
            _transactionValue,
            null,
            inputParameters).GetAwaiter().GetResult();
      if (!receipt.Status.Value.Equals(1))
      {
        throw new OperationCanceledException($"Unable to complete transaction. Transaction hash: {receipt.TransactionHash}.");
      }
    }
  }

private Function GetEthFunction(string privateKey,
      string contractAddress, string url, string smartContractLocation, string functionName, out Account account,
      int chainId)
    {
      account = new Account(privateKey, chainId);
      var web3 = new Web3(account, url);

      string abi = null;
      using (StreamReader file = File.OpenText($@"{smartContractLocation}"))
      {
        abi = file.ReadToEnd();
      }
      var contract = web3.Eth.GetContract(abi, contractAddress);
      return contract.GetFunction(functionName);
    }

我该如何解决？ 谢谢。

Answer 1

对我有用的解决方案是禁用EIP1559交易。如果您使用的是启用了EIP1559的链条，最著名的是BSC，这将非常有用。这是这样做的代码：

Web3.TransactionManager.UseLegacyAsDefault = true;

希望这对将来的任何人都有相同的问题有所帮助。 （请注意，Web3类必须在此处进行，并且不是 static）

Answer 2

在Nethereum版本4.5中，方法sendtransactionandwaitforreceiptasync的逻辑已从3.8.0中实现的逻辑变化。
因此，我不得不使用另一个功能覆盖。

public void Write(...)
{
...
      var transactionInput = new TransactionInput
      {
        From = account.Address,
        Gas = _estimatedGas,
        MaxPriorityFeePerGas = null,
        GasPrice = _transactionValue,
        Type = null
      };
      var receipt = function.SendTransactionAndWaitForReceiptAsync(transactionInput, null, inputParameters).GetAwaiter().GetResult();
...
}

这样，它将完全像Nethereum的3.8.0一样工作。

Answer 3

只需使用此代码，就应该有效
web3.transactionmanager.uselegacyasdefault = true;