Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {Ownable} from "@openzeppelin/[email protected]/access/Ownable.sol";

/**
 * @title  WhitelistManager
 * @author XeonNG
 * @notice Stores sale‑phase parameters and whitelists for four tiers
 *         (Public, Whitelist, Private, Preferred). A separate “sale” contract can
 *         query this manager to decide whether a buyer is allowed.
 */
contract WhitelistManager is Ownable {
    /* --------------------------------------------------------------------- */
    /*                               Data Types                              */
    /* --------------------------------------------------------------------- */

    enum SaleType {
        Public,
        Whitelist,
        Private,
        Preferred
    }

    struct SaleConfig {
        uint256 startTime; // Unix timestamp (seconds)
        uint256 endTime; // Unix timestamp (seconds)
    }

    /* --------------------------------------------------------------------- */
    /*                              State Vars                               */
    /* --------------------------------------------------------------------- */

    /// @dev Sale params by tier
    mapping(SaleType => SaleConfig) private _configs;

    /// @dev Whitelist status by tier → user
    mapping(SaleType => mapping(address => bool)) private _isWhitelisted;

    /* --------------------------------------------------------------------- */
    /*                                  Events                               */
    /* --------------------------------------------------------------------- */

    event ConfigUpdated(
        SaleType indexed saleType,
        uint256 startTime,
        uint256 endTime
    );

    /* --------------------------------------------------------------------- */
    /*                               Constructor                             */
    /* --------------------------------------------------------------------- */

    constructor(address initialOwner) Ownable(initialOwner) {}

    /* --------------------------------------------------------------------- */
    /*                              Admin Logic                              */
    /* --------------------------------------------------------------------- */

    /**
     * @notice Set the time window and quantity limits for a sale tier.
     * @param saleType          Tier being updated.
     * @param startTime         Inclusive Unix timestamp.
     * @param endTime           Inclusive Unix timestamp.
     */
    function setConfig(
        SaleType saleType,
        uint256 startTime,
        uint256 endTime
    ) external onlyOwner {
        require(endTime > startTime, "Invalid time range");

        _configs[saleType] = SaleConfig({
            startTime: startTime,
            endTime: endTime
        });

        emit ConfigUpdated(saleType, startTime, endTime);
    }

    /**
     * @notice Add or remove a single wallet from a tier’s whitelist.
     * @dev    For batch updates see {setWhitelistedBatch}.
     */
    function setWhitelisted(
        SaleType saleType,
        address account,
        bool allowed
    ) external onlyOwner {
        _isWhitelisted[saleType][account] = allowed;
    }

    /**
     * @notice Gas‑efficient batch whitelist update.
     * @param saleType Tier to update.
     * @param accounts Wallets to update.
     * @param allowed  true to whitelist, false to remove.
     */
    function setWhitelistedBatch(
        SaleType saleType,
        address[] calldata accounts,
        bool allowed
    ) external onlyOwner {
        mapping(address => bool) storage list = _isWhitelisted[saleType];
        uint256 len = accounts.length;

        for (uint256 i; i < len; ++i) {
            list[accounts[i]] = allowed;
        }
    }

    /* --------------------------------------------------------------------- */
    /*                          Read‑only Helpers                            */
    /* --------------------------------------------------------------------- */

    /**
     * @notice Return the sale tier a wallet belongs to.
     * @dev    Preferred > Private > Whitelist > Public precedence.
     */
    function tierOf(address user) public view returns (SaleType tier) {
        if (_isWhitelisted[SaleType.Preferred][user]) return SaleType.Preferred;
        if (_isWhitelisted[SaleType.Private][user]) return SaleType.Private;
        if (_isWhitelisted[SaleType.Whitelist][user]) return SaleType.Whitelist;
        return SaleType.Public;
    }

    /**
     * @notice Quick check usable by a sale contract.
     * @param  user Wallet to validate.
     * @return True if current block is within that user’s tier window.
     */
    function canBuy(address user) external view returns (bool) {
        SaleConfig memory cfg = _configs[tierOf(user)];
        return
            block.timestamp >= cfg.startTime && block.timestamp <= cfg.endTime;
    }

    /**
     * @notice Get the full config for a tier.
     */
    function getConfig(
        SaleType saleType
    ) external view returns (SaleConfig memory) {
        return _configs[saleType];
    }

    /**
     * @notice Check explicit whitelist status.
     */
    function isWhitelisted(
        SaleType saleType,
        address user
    ) external view returns (bool) {
        return _isWhitelisted[saleType][user];
    }

    /**
     * @notice Check if the current block is within the Public sale window.
     */
    function isPublicSale() external view returns (bool) {
        SaleConfig memory cfg = _configs[SaleType.Public];
        return
            block.timestamp >= cfg.startTime && block.timestamp <= cfg.endTime;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }
}