Faucet

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.0 (Wizard / Contracts MCP patterns)
// Compiled with Solidity ^0.8.24 — BNB Toolset browser solc
pragma solidity ^0.8.24;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract TokenFaucet is Ownable {
    using SafeERC20 for IERC20;

    IERC20 public immutable token; // address(0) = native BNB
    uint256 public dripAmount;
    uint256 public cooldown;
    mapping(address => uint256) public lastClaim;

    constructor(address initialOwner, IERC20 _token, uint256 _drip, uint256 _cooldown)
        Ownable(initialOwner)
    {
        token = _token;
        dripAmount = _drip;
        cooldown = _cooldown;
    }

    receive() external payable {}

    function claim() external {
        require(block.timestamp >= lastClaim[msg.sender] + cooldown, "cooldown");
        lastClaim[msg.sender] = block.timestamp;
        if (address(token) == address(0)) {
            require(address(this).balance >= dripAmount, "empty");
            (bool ok,) = msg.sender.call{value: dripAmount}("");
            require(ok, "bnb transfer failed");
        } else {
            token.safeTransfer(msg.sender, dripAmount);
        }
    }

    function setDrip(uint256 _drip) external onlyOwner { dripAmount = _drip; }
    function setCooldown(uint256 _cd) external onlyOwner { cooldown = _cd; }
}