Game

// SPDX-License-Identifier: MIT LICENSE

pragma solidity ^0.8.0;

import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.4.0/contracts/token/ERC20/ERC20.sol';
import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.4.0/contracts/access/Ownable.sol';
import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.4.0/contracts/token/ERC721/IERC721.sol';
import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.4.0/contracts/utils/math/SafeMath.sol';

contract Game is ERC20, Ownable {
  using SafeMath for uint256;

  address public DEV_WALLET;
  address public CONSOLE_STAKING;

  IERC721 public CONSOLE;

  uint256 public constant DAILY_DEV_EMISSION = 450 ether;
  uint256 public constant CLAIM_TIME = 1639497600; // 15/12/2021 00:00:00 UTC
  uint256 public constant SECINDAY = 86400;
  uint256 public lastDevClaim;

  mapping(uint256 => bool) public claimed; // mapping for state of initial reward for each console NFT
  
  event INITIAL_CLAIM(address indexed claimer, uint256 tokenId);

  constructor(
    address _dev_wallet,
    IERC721 _CONSOLE
  ) ERC20("Game", "Game") {
    DEV_WALLET = _dev_wallet;
    CONSOLE = _CONSOLE;

    lastDevClaim = block.timestamp;
  }

  function claim(uint256 _id) external{
    require(block.timestamp > CLAIM_TIME, 'not_yet');
    require(claimed[_id] == false, 'already_claimed');
    require(CONSOLE.ownerOf(_id) == msg.sender, 'only_console_owner');

    claimed[_id] = true;
    _mint(msg.sender, 10 ether);

    emit INITIAL_CLAIM(msg.sender, _id);
  }

  function claimDailyDev() external onlyOwner {
    uint256 delayed = block.timestamp.sub(lastDevClaim).div(SECINDAY);

    if (delayed > 0) {
      _mint(DEV_WALLET, DAILY_DEV_EMISSION.mul(delayed));
      lastDevClaim = lastDevClaim.add(SECINDAY.mul(delayed));
    }
  }
  
  function updateConsoleStaking(address _consoleStaking) external onlyOwner {
    CONSOLE_STAKING = _consoleStaking;
  }

  function mint(address _receiver, uint256 _amount) external{
    require(msg.sender == CONSOLE_STAKING, "only_staking_callable");
    _mint(_receiver, _amount);
  }

}

{
  "compilationTarget": {
    "contracts/GameToken.sol": "Game"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}