Question

我正在尝试测试简单的传输方法（将某人的以太移动到另一个），但是混合（可靠的网络编译器）说

transact to browser/Exchange.sol:Exchange.transfer pending ... 
transact to browser/Exchange.sol:Exchange.transfer errored: Error: VM Exception while executing eth_estimateGas: invalid opcode
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:59368:17
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:69306:5
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:11335:9
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:7895:16
at replenish (/Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:8415:25)
at iterateeCallback (/Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:8405:17)
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:8380:16
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:11332:13
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:69302:9
at /Users/strender/.nvm/versions/node/v8.8.1/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:63982:7

，我的Solidity文件结构是

pragma solidity ^0.4.18;

contract Exchange {
  mapping (address => uint256) public balances;
  string public helloworld;

  event LogDeposit(address sender, uint amount);
  event LogWithdraw(address receiver, uint amount);
  event LogTransfer(address sender, address receiver, uint amount);
  event HelloworldEvent(string helloworld);


  function Exchange() {
    helloworld = "helloworld!";
  }

  function helloWorld() returns (string) {
    return helloworld;
  }

  function deposit() payable returns(bool success) {
    balances[msg.sender] += msg.value;
    LogDeposit(msg.sender, msg.value);
    return true;
  }

  function withdraw(uint value) returns (bool success) {
    if (balances[msg.sender] < value) throw;
    balances[msg.sender] -= value;
    msg.sender.transfer(value);
    LogWithdraw(msg.sender, value);
    return true;
  }

  function transfer(address to, uint value) payable returns (bool success) {
    if (balances[msg.sender] < value) throw;
    balances[msg.sender] -= value;
    to.transfer(value);
    LogTransfer(msg.sender, to, value);
    return true;
  }

}

并且，在web3 javascript上，我试着像这样调用函数“transfer（address to，uint value）：

  $("#button").click(function() {
      Exchange.transfer(receiver.toString(), 2);
      // $("#loader").show();
    });

当我向此Exchange.transfer（）方法添加一些气体值参数时，VM返回“基本费用超过气体限制”

Answer 1

每条链都有一个气体限制，即矿工可以为您的行动完成的最大气体量。因此，当您收到错误时，基本费用超过了气体限制＆＃34;它说，为执行你的行动提供的气体量超过了我解释的限制。您可以手动更改此限制：

Exchange.transfer（receiver.toString（），2，{gas：＆＃39; amount here＆＃39;}）;

你可能已经知道，但我的猜测是你提供的东西太多了。

至于你在混音中的错误，很难说清楚到底是怎么回事，但毫无疑问这样玩你提供的气体和类似的参数可能会有所帮助。

web3错误：执行eth_estimateGas时出现VM异常：操作码无效

1 个答案: