ParserError:应为'{‘，但获得了'(’函数权益()公共payable ())

Question

pragma solidity >=0.6.0 <0.7.0;

import "hardhat/console.sol";
import "./ExampleExternalContract.sol";

contract Staker {
    
    ExampleExternalContract public exampleExternalContract;
    mapping(address => uint256) public balances;
    uint256 public constant treshold = 1 ether;
    event Stake(address staker, uint256 amount);
    
    constructor(address exampleExternalContractAddress) public {
        exampleExternalContract = ExampleExternalContract(exampleExternalContractAddress);
    }
    
    function stake() public payable () {
        balances[msg.sender] = msg.value;
        emit Stake(msg.sender, msg.value);
    }
}

当我尝试部署此代码时，收到预期为'{‘的解析错误，但得到的是'(’。对发生了什么有什么想法吗？

Answer 1

在stake函数定义中有一对额外的圆括号。

替换这个

function stake() public payable () {

有了这个

function stake() public payable {