Fox24Presale

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
"
    },
    "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
"
    },
    "contracts/Fox24Presale.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
pragma solidity ^0.8.20;\r
\r
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";\r
import "@openzeppelin/contracts/access/Ownable.sol";\r
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";\r
\r
contract Fox24Presale is Ownable, ReentrancyGuard {\r
    IERC20 public immutable token;\r
    address payable public immutable ownerWallet;\r
\r
    // --- Parametry przedsprzedaży (niezmienne po wdrożeniu) ---\r
    uint256 public constant TOKEN_PRICE = 0.01 ether; // Cena za 1 pełny token FOX24\r
    uint256 public constant HARD_CAP = 1 ether;\r
    uint256 public constant MIN_CONTRIBUTION = 0.01 ether;\r
    uint256 public constant MAX_CONTRIBUTION = 1 ether;\r
\r
    // --- Zmienne stanu ---\r
    uint256 public totalRaised;\r
    bool public presaleActive;\r
    mapping(address => uint256) public contributions;\r
\r
    // --- Eventy ---\r
    event TokensPurchased(address indexed buyer, uint256 ethAmount, uint256 tokenAmount);\r
    event PresaleStateChanged(bool isActive);\r
\r
    constructor(address _tokenAddress, address payable _ownerWallet) {\r
        require(_tokenAddress != address(0), "Presale: Token address cannot be zero");\r
        require(_ownerWallet != address(0), "Presale: Owner wallet cannot be zero");\r
\r
        token = IERC20(_tokenAddress);\r
        ownerWallet = _ownerWallet;\r
    }\r
\r
    // --- FUNKCJE DLA INWESTORÓW ---\r
\r
    /**\r
     * @dev Główna funkcja zakupu tokenów.\r
     */\r
    function buyTokens() public payable nonReentrant {\r
        require(presaleActive, "Presale: Sale is not active");\r
        uint256 weiAmount = msg.value;\r
\r
        // Sprawdzenie limitów wpłat\r
        require(weiAmount >= MIN_CONTRIBUTION, "Presale: Below min contribution");\r
        require(contributions[msg.sender] + weiAmount <= MAX_CONTRIBUTION, "Presale: Above max contribution");\r
        require(totalRaised + weiAmount <= HARD_CAP, "Presale: Exceeds hard cap");\r
\r
        // ✅ POPRAWKA: Prawidłowa kalkulacja ilości tokenów z uwzględnieniem 18 miejsc po przecinku.\r
        uint256 tokensToBuy = (weiAmount * (10**18)) / TOKEN_PRICE;\r
        \r
        require(tokensToBuy > 0, "Presale: ETH too low to buy tokens");\r
\r
        // Aktualizacja stanu kontraktu\r
        totalRaised += weiAmount;\r
        contributions[msg.sender] += weiAmount;\r
\r
        // Sprawdzenie, czy kontrakt ma wystarczająco tokenów do wysłania\r
        uint256 contractTokenBalance = token.balanceOf(address(this));\r
        require(contractTokenBalance >= tokensToBuy, "Presale: Not enough tokens in contract");\r
\r
        // Wysłanie tokenów do kupującego\r
        bool sent = token.transfer(msg.sender, tokensToBuy);\r
        require(sent, "Presale: Token transfer failed");\r
\r
        emit TokensPurchased(msg.sender, weiAmount, tokensToBuy);\r
\r
        // Automatyczne zakończenie przedsprzedaży po osiągnięciu Hard Cap\r
        if (totalRaised == HARD_CAP) {\r
            presaleActive = false;\r
            emit PresaleStateChanged(false);\r
        }\r
    }\r
\r
    /**\r
     * @dev Funkcja receive() pozwala na kupno tokenów przez proste wysłanie ETH na adres kontraktu.\r
     */\r
    receive() external payable {\r
        buyTokens();\r
    }\r
\r
    // --- FUNKCJE ADMINISTRACYJNE (tylko dla właściciela) ---\r
\r
    function startPresale() external onlyOwner {\r
        require(!presaleActive, "Presale: Already active");\r
        presaleActive = true;\r
        emit PresaleStateChanged(true);\r
    }\r
\r
    function stopPresale() external onlyOwner {\r
        require(presaleActive, "Presale: Not active");\r
        presaleActive = false;\r
        emit PresaleStateChanged(false);\r
    }\r
\r
    function withdrawFunds() external onlyOwner {\r
        uint256 balance = address(this).balance;\r
        require(balance > 0, "Presale: No funds");\r
\r
        (bool success, ) = ownerWallet.call{value: balance}("");\r
        require(success, "Presale: ETH transfer failed");\r
    }\r
\r
    function withdrawUnsoldTokens() external onlyOwner {\r
        uint256 remainingBalance = token.balanceOf(address(this));\r
        require(remainingBalance > 0, "Presale: No unsold tokens");\r
\r
        bool sent = token.transfer(owner(), remainingBalance);\r
        require(sent, "Presale: Token transfer failed");\r
    }\r
}"
    }
  },
  "settings": {
    "evmVersion": "paris",
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}