Faucet

Faucet.sol

// SPDX-License-Identifier: MIT
// Author: Janusz Chudzynski
pragma solidity >=0.4.22 <0.9.0;

contract Faucet {
 
  mapping(address=>uint) lastTransfers;
  uint maxAllowed = 10 ** 18 * 5000;
  constructor() {

  }

  function requestTokens(address payable requestor, uint amount) external {
    uint lastTransfer = lastTransfers[requestor];
 
    require(lastTransfer > block.timestamp + 1 hours, "You already requested funds hour ago");
    require(address(this).balance > maxAllowed, "Not enough funds in the faucet. Please donate");
    require(maxAllowed - amount >= 0, "Requested More than allowed");

    requestor.transfer(amount);
    lastTransfers[requestor] = amount;
  }
}