NaughtCoin.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '@openzeppelin-08/token/ERC20/ERC20.sol';

contract NaughtCoin is ERC20 {
  // string public constant name = 'NaughtCoin';
  // string public constant symbol = '0x0';
  // uint public constant decimals = 18;
  uint256 public timeLock = block.timestamp + 10 * 365 days;
  uint256 public INITIAL_SUPPLY;
  address public player;

  constructor(address _player) ERC20('NaughtCoin', '0x0') {
    player = _player;
    INITIAL_SUPPLY = 1000000 * (10 ** uint256(decimals()));
    // _totalSupply = INITIAL_SUPPLY;
    // _balances[player] = INITIAL_SUPPLY;
    _mint(player, INITIAL_SUPPLY);
    emit Transfer(address(0), player, INITIAL_SUPPLY);
  }

  function transfer(
    address _to,
    uint256 _value
  ) public override lockTokens returns (bool) {
    return super.transfer(_to, _value);
  }

  // Prevent the initial owner from transferring tokens until the timelock has passed
  modifier lockTokens() {
    if (msg.sender == player) {
      require(block.timestamp > timeLock);
      _;
    } else {
      _;
    }
  }
}