ERC20代币合约的批准function问题

Question

So, whenever I am trying to approve my smart contract using the approve function of the ERC20 token contract the owner and the spender are being set the same.

function getValues(address _token) external {
       
        MyToken token = MyToken(0xd9145CCE52D386f254917e481eB44e9943F39138);
        token.approve(address(this),10);
                   
}
function transfer(address _token) external {
      MyToken token = MyToken(0xd9145CCE52D386f254917e481eB44e9943F39138);
    token.transferFrom(msg.sender,address(this),10);
}

The output to the code is coming something like this [ { "from": "0xd9145CCE52D386f254917e481eB44e9943F39138", "topic": "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925", "event": "Approval", "args": { "0": "0xf8e81D47203A594245E36C48e151709F0C19fBe8", "1": "0xf8e81D47203A594245E36C48e151709F0C19fBe8", "2": "10", "owner": "0xf8e81D47203A594245E36C48e151709F0C19fBe8", "spender": "0xf8e81D47203A594245E36C48e151709F0C19fBe8", "value": "10" } } ]

Answer 1

Calling approve inside the smart contract make the contract the msg.sender of the call to the approve function, what you are doing in get values is approving the contract to move the tokens the contract already owns, if you want to make an use to approve the contract to move the user tokens that call should be made by the user