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Erc20 transfer to contract address

2022-02-03 22:59:16 Q & A of Denglian community

function deposition(address _tokenAddress,uint256 amount)public payable {        IERC20 token = IERC20(_tokenAddress);        token.approve(address(this),amount);        token.transferFrom(msg.sender,address(this),amount);    }

The above is what I wrote ERC20 Code for transfer to contract address , Transfer failure . Can you see what the problem is ?

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