USDC Faucet in Goerli

USDCFaucet.sol

// SPDX-License-Identifier: MIT
// Copyright (c) 2020 petejkim

pragma solidity 0.6.12;

import { Ownable } from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.2.0/contracts/access/Ownable.sol";
import { IERC20 } from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.2.0/contracts/token/ERC20/IERC20.sol";
import { SafeERC20 } from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.2.0/contracts/token/ERC20/SafeERC20.sol";

contract USDCFaucet is Ownable {
    using SafeERC20 for IERC20;
    
    mapping (address => uint256) public lastClaimedAt;
    uint256 public amount = 100000000;
    uint256 public waitPeriod = 3600;
    address public tokenAddress = 0x2f3A40A3db8a7e3D09B0adfEfbCe4f6F81927557;
    
    function configure(uint256 newAmount, uint256 newWaitPeriod, address newTokenAddress) external onlyOwner {
        amount = newAmount;
        waitPeriod = newWaitPeriod;
        tokenAddress = newTokenAddress;
    }
    
    function canClaim(address account) external view returns (bool) {
        return lastClaimedAt[account] + waitPeriod < now;
    }
    
    function claim() external {
        require(lastClaimedAt[msg.sender] + waitPeriod < now, "You cannot claim again so soon!");
        lastClaimedAt[msg.sender] = now;
        IERC20(tokenAddress).safeTransfer(msg.sender, amount);
    }
    
    function drain() external onlyOwner {
        IERC20 token = IERC20(tokenAddress);
        token.safeTransfer(msg.sender, token.balanceOf(address(this)));
    }
    
    function destroy() external onlyOwner {
        selfdestruct(msg.sender);
    }
}

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