Bitgert Finance Blockchain Lead Developer

Answer3.sol

/**
 * ANSWER 3:
 * BEP-20 tokens follow the same interface as ERC-20 (EVM standard).
 * To interact with a BEP-20 token, I use the standard ERC-20 interface,
 * or preferably the `SafeERC20` wrapper from OpenZeppelin to improve safety.
 *
 * Key functions used to interact with the token contract:
 *
 * - `transferFrom(address from, address to, uint256 amount)` — for staking
 * - `transfer(address to, uint256 amount)` — for withdrawals
 * - `balanceOf(address account)` — to display user balances
 *
 * When using `SafeERC20`, these become:
 *
 * - `safeTransferFrom(from, to, amount);`
 * - `safeTransfer(to, amount);`
 *
 * Example:
 */
 
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.28;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

contract Staking {
  using SafeERC20 for IERC20;

  IERC20 public token;

  constructor(address tokenAddress) {
    token = IERC20(tokenAddress);
  }

  function stake(uint256 amount) external {
    require(amount > 0, "Amount must be greater than zero");
    token.safeTransferFrom(msg.sender, address(this), amount);
    // update staking logic here...
  }

  function withdraw(uint256 amount) external {
    // check if user can withdraw...
    token.safeTransfer(msg.sender, amount);
  }
}