Getting execution reverted error when calling TransferFrom() function

Question

This is my following Code. I am using the Rinkeby network.

//SPDX-License-Identifier: MIT
pragma solidity ^0.8;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";

contract TransferDAI{
    IERC20 public dai;
   
    constructor() {
        dai = IERC20(0x5592EC0cfb4dbc12D3aB100b257153436a1f0FEa);
    }
    
    
    function Transfer(uint _amount) external {
        dai.transferFrom(msg.sender, address(this), _amount);
    }
   
    // Some extra functions for now...
    function getDaiBalance(address _address) external view returns(uint) {
        return dai.balanceOf(_address);
    }
}

I am not able to transfer Dai to the contract address. Although I can view getDaiBalance and see the correct amount of DAIs.

Any lead will be helpful. I tried using dai.approve(msg.sender,_amount) it wasn't helpful.

Answer 1

dai.approve(msg.sender, _amount) lets msg.sender spend _amount of tokens that are in the contract balance. Not the other way around. You need to have your wallet call approve directly on the DAI contract address, with your contract address and amount as inputs.