坚固性：ParserError：预期';' 但得到'（'

Question

1. first of all.I want to check what "solidity: ParserError: Expected ';' but got '('" want to express.
2. How can I improve my code to pass it?

//SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0<0.9.0;

contract Withdraw{
    constructor()payable{}
    fucntion withdrawByTransfer() public {
        paybale(msg.sender).transfer(1 ether);
    }

    fucntion withdrawBySend()public{
        bool success = paybale(msg.sender).send(1 eth);
        require(succeess);
    }

    fucntion withdrawByCall() public returns(bytes memory){
        (bool succeess,bytes memory result) = payable(msg.sender).call{value: require(success)};

        return result;
    }
}

enter image description here some ref Solidity ParserError: Expected ';' but got '{'

Solidity - ParserError: Expected ';' but got '['

Answer 1

First fix your typos function and payable are keywords typos are not tolerated. this will fix the expected; error

Secondly, a significant problem lies in your 3rd function. A basic rule in programming is the right side of the expression gets executed first, so in this line

(bool success,bytes memory result) = payable(msg.sender).call{value: require(success)};

success in the require statement is not visible since it has not been initialized with a value yet. but even if success does have a value the argument 'value' does not accept a require statement as a value here is how you fix it.

function withdrawByCall() public payable returns(bytes memory){
        (bool success,bytes memory result) = payable(msg.sender).call{value: msg.value}(" ");
        require(success);
        return result;
    }

Answer 2

Here is the completed code

//SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0<0.9.0;

contract Withdraw {
    constructor() payable {}

    function withdrawByTransfer(uint256 amount) public payable {
        payable(msg.sender).transfer(amount);
    }

    function withdrawBySend(uint256 amount) public payable {
        bool success = payable(msg.sender).send(amount);
        require(success, "Failed to send Ether");
    }

    function withdrawByCall(uint256 amount) public returns(bytes memory) {
        (bool success, bytes memory result) = payable(msg.sender).call{value: amount}("");
        require(success, "Failed to withdraw Ether");

        return result;
    }
}