.NET Core+Ganache调用合约Payable函数报错：eth_feeHistory不支持

我用.NET Core开发Web3分布式应用，测试阶段采用Ganache私链。通过Nethereum的Web3对象调用已部署智能合约时，查询函数getCount可正常返回结果，EstimateGasAsync也能正常执行，但调用Payable函数addNewRecords的SendTransactionAndWaitForReceiptAsync方法时，抛出RpcResponseException: Method eth_feeHistory not supported.: eth_feeHistory异常。

.NET Core相关代码 #

var contractAddress = "0x5c2d640027901a19B94ee0f9EEFFdc1cB660898a";
var abi = @"[{"inputs": [],"stateMutability": ..... Complete ABI"; 
var contract = web3.Eth.GetContract(abi, contractAddress);
var getFunction = contract.GetFunction("getCount");
var addfunction = contract.GetFunction("addNewRecords");
            
// 我的账户地址
var senderAddress = account.Address;

// 此方法正常运行
var result_1 = await getFunction.CallAsync<int>();

// 此方法正常运行
var gas = await addfunction.EstimateGasAsync(senderAddress, null, null, "Umer", "FAll2022", "umar@gmail.com"); 
         
 // 此处抛出异常
 var result = await addfunction.SendTransactionAndWaitForReceiptAsync(senderAddress, gas, null, null, "Umer", "FAll2022", "umar@gmail.com");

Solidity合约代码 #

function addNewRecords(string memory _name, string memory _email, string memory _rollNumber) public payable returns(bool) 
{
    // 计数加1
    stdCount = stdCount + 1;

    // 存储学生信息
    std_Records[int(stdCount)] = Student(_name,_email,_rollNumber);
    return true;
}

function getCount() public view returns(uint){
    return stdCount;
}

完整错误栈 #

RpcResponseException: Method eth_feeHistory not supported.: eth_feeHistory
Nethereum.JsonRpc.Client.ClientBase.HandleRpcError(RpcResponseMessage response, string reqMsg)
Nethereum.JsonRpc.Client.ClientBase.SendInnerRequestAsync<T>(RpcRequestMessage reqMsg, string route)
Nethereum.JsonRpc.Client.ClientBase.SendRequestAsync<T>(RpcRequest request, string route)
Nethereum.RPC.Fee1559Suggestions.TimePreferenceFeeSuggestionStrategy.SuggestFeesAsync()
Nethereum.RPC.Fee1559Suggestions.TimePreferenceFeeSuggestionStrategy.SuggestFeeAsync(Nullable<BigInteger> maxPriorityFeePerGas)
Nethereum.RPC.TransactionManagers.TransactionManagerBase.SetTransactionFeesOrPricingAsync(TransactionInput transaction)
Nethereum.Web3.Accounts.AccountSignerTransactionManager.SignTransactionRetrievingNextNonceAsync(TransactionInput transaction)
Nethereum.Web3.Accounts.AccountSignerTransactionManager.SignAndSendTransactionAsync(TransactionInput transaction)
Nethereum.Web3.Accounts.AccountSignerTransactionManager.SendTransactionAsync(TransactionInput transactionInput)
Nethereum.RPC.TransactionReceipts.TransactionReceiptPollingService.SendRequestAndWaitForReceiptAsync(Func<Task<string>> transactionFunction, CancellationToken cancellationToken)
BlockChainAppWeb.Controllers.HomeController.IndexAsync(Category c) in HomeController.cs
+
            var result_2 = await addfunction.SendTransactionAndWaitForReceiptAsync(senderAddress, gas, null, null, "Umer", "Farooq", "Abc");
Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor+TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, object controller, object[] arguments)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ValueTaskAwaiter<TResult>.GetResult()
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask<IActionResult> actionResultValueTask)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

解决方案 #

异常核心原因是Ganache默认不支持EIP-1559标准的eth_feeHistory RPC方法，而Nethereum新版本默认使用EIP-1559的费用策略发送交易，导致调用了Ganache不支持的方法。

方法1：禁用EIP-1559，使用传统Gas价格模式 #

可以通过两种方式实现：

• 创建Web3实例时指定使用传统交易管理器：

  var web3 = new Web3(account, "http://localhost:7545", new LegacyTransactionManager());
  

• 发送交易时手动指定GasPrice：

  var gasPrice = await web3.Eth.GasPrice.SendRequestAsync();
  var result = await addfunction.SendTransactionAndWaitForReceiptAsync(
      senderAddress, 
      gas, 
      gasPrice, // 手动传入GasPrice
      null, 
      "Umer", 
      "FAll2022", 
      "umar@gmail.com"
  );
  

方法2：升级Ganache并启用EIP-1559支持 #

如果需要使用EIP-1559，可升级到最新版Ganache并开启支持：

• 图形界面：在Ganache设置的「Chain」选项中开启「EIP-1559」开关
• 命令行：启动时添加--eip1559参数，例如ganache --eip1559

修改后重新运行代码，SendTransactionAndWaitForReceiptAsync即可正常发送交易并返回收据。

内容的提问来源于stack exchange，提问作者Umar Farooq