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UsdcDemo.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

// Abstract
interface USDC {
    function balanceOf(address account) external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}

// Contract
contract UsdcDemo{

    USDC public USDc;

    // Contract Owner
    address payable public owner; 

    constructor(address usdcContractAddress) {

        USDc = USDC(usdcContractAddress);

        // USDc = USDC(0x07865c6E87B9F70255377e024ace6630C1Eaa37F);
    
        // user who is calling this function address
        owner = payable(msg.sender);
    }


    function Fund(uint $USDC) public payable {

       // Transfer USDC to this contract from the sender account
        USDc.transferFrom(msg.sender, address(this), $USDC * 10 ** 6);  


        // Transfer to the owner
        USDc.transfer(owner, $USDC * 10 ** 6);  
    }


    receive() payable external {

        // Send the fund to the owner of the contract.
        owner.transfer(address(this).balance);
    }      
}