Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.24;

// Addresses
address constant DRAGONX_ADDRESS = 0x96a5399D07896f757Bd4c6eF56461F58DB951862;
address constant TITANX_ADDRESS = 0xF19308F923582A6f7c465e5CE7a9Dc1BEC6665B1;
address constant WETH9_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address constant UNI_SWAP_ROUTER = 0xE592427A0AEce92De3Edee1F18E0157C05861564;

/* Uniswap Liquidity Pools (DragonX, TitanX) */
uint24 constant FEE_TIER = 10000;

// Dragon Types
enum DragonTypes {
    Apprentice,
    Ninja,
    Samurai,
    Shogun,
    Emperor
}

// Constants for Apprentice
uint256 constant APPRENTICE_MINT_FEE = 8800 * 10 ** 18; // 8.8 K TitanX with 18 decimals
uint256 constant APPRENTICE_BURN_FEE = 8800 * 10 ** 18; // 8.8 K DragonX with 18 decimals
uint256 constant APPRENTICE_LOCKUP_AMOUNT = 8800000 * 10 ** 18; // 8.8 Million DragonX with 18 decimals

// Constants for Ninja
uint256 constant NINJA_MINT_FEE = 88000 * 10 ** 18; // 88 K TitanX with 18 decimals
uint256 constant NINJA_BURN_FEE = 88000 * 10 ** 18; // 88 K DragonX with 18 decimals
uint256 constant NINJA_LOCKUP_AMOUNT = 88000000 * 10 ** 18; // 88 Million DragonX with 18 decimals

// Constants for Samurai
uint256 constant SAMURAI_MINT_FEE = 880000 * 10 ** 18; // 880 K TitanX with 18 decimals
uint256 constant SAMURAI_BURN_FEE = 880000 * 10 ** 18; // 880 K DragonX with 18 decimals
uint256 constant SAMURAI_LOCKUP_AMOUNT = 888000000 * 10 ** 18; // 888 Million DragonX with 18 decimals

// Constants for Shogun
uint256 constant SHOGUN_MINT_FEE = 8800000 * 10 ** 18; // 8.8 Million TitanX with 18 decimals
uint256 constant SHOGUN_BURN_FEE = 8800000 * 10 ** 18; // 8.8 Million DragonX with 18 decimals
uint256 constant SHOGUN_LOCKUP_AMOUNT = 8800000000 * 10 ** 18; // 8.8 Billion DragonX with 18 decimals

// Constants for Emperor
uint256 constant EMPEROR_MINT_FEE = 88800000 * 10 ** 18; // 88.8 Million TitanX with 18 decimals
uint256 constant EMPEROR_BURN_FEE = 88800000 * 10 ** 18; // 88.8 Million DragonX with 18 decimals
uint256 constant EMPEROR_LOCKUP_AMOUNT = 88000000000 * 10 ** 18; // 88 Billion DragonX with 18 decimals

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.24;

// OpenZeppelin
import "@openzeppelin/contracts/utils/Context.sol";

// lib
import "./lib/interfaces/IDragonX.sol";
import "./lib/Constants.sol";

contract DragonBurnProxy is Context {
    // -----------------------------------------
    // Type declarations
    // -----------------------------------------

    // -----------------------------------------
    // State variables
    // -----------------------------------------
    /**
     * @notice The total amount of DragonX burned through the DragonX burn proxy
     */
    uint256 public totalDragonBurned;

    // -----------------------------------------
    // Events
    // -----------------------------------------
    /**
     * Emitted when burning all DragonX tokens hold by the DragonX burn proxy
     * @param caller the function caller
     * @param amount the amount burned
     */
    event Burned(address indexed caller, uint256 indexed amount);

    // -----------------------------------------
    // Errors
    // -----------------------------------------

    // -----------------------------------------
    // Modifiers
    // -----------------------------------------

    // -----------------------------------------
    // Constructor
    // -----------------------------------------

    // -----------------------------------------
    // Receive function
    // -----------------------------------------
    /**
     * @dev Receive function to handle plain Ether transfers.
     * Always revert.
     */
    receive() external payable {
        revert("noop");
    }

    // -----------------------------------------
    // Fallback function
    // -----------------------------------------
    /**
     * @dev Fallback function to handle non-function calls or Ether transfers if receive() doesn't exist.
     * Always revert.
     */
    fallback() external {
        revert("noop");
    }

    // -----------------------------------------
    // External functions
    // -----------------------------------------
    /**
     * @dev Burns tokens held by this contract and updates the total burned tokens count.
     *      Only callable by external addresses.
     *
     *      The function retrieves the balance of tokens (assumed to be DragonX tokens)
     *      held by the contract itself. If the balance is non-zero, it proceeds to burn
     *      those tokens by calling the `burn` method on the DragonX contract. After burning
     *      the tokens, it updates the `totalDragonBurned` state variable to reflect the new
     *      total amount of burned tokens. Finally, it emits a `Burned` event indicating
     *      the address that initiated the burn and the amount of tokens burned.
     *
     * Emits a `Burned` event with the caller's address and the amount burned.
     */
    function burn() external {
        IDragonX dragonX = IDragonX(DRAGONX_ADDRESS);
        uint256 toBurn = dragonX.balanceOf(address(this));

        // noop if nothing to burn
        if (toBurn == 0) {
            return;
        }

        // Burn tokens hold by the proxy
        dragonX.burn();

        // Update State
        totalDragonBurned += toBurn;

        // Emit events
        emit Burned(_msgSender(), toBurn);
    }

    // -----------------------------------------
    // Public functions
    // -----------------------------------------

    // -----------------------------------------
    // Internal functions
    // -----------------------------------------

    // -----------------------------------------
    // Private functions
    // -----------------------------------------
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.24;

// OpenZeppelin
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IDragonX is IERC20 {
    // External functions
    function mint(uint256 amount) external;
    function stake() external;
    function claim() external returns (uint256 claimedAmount);
    function totalStakesOpened() external view returns (uint256 totalStakes);
    function incentiveFeeForClaim() external view returns (uint256 fee);
    function stakeReachedMaturity() external view returns (bool hasStakesToEnd, address instanceAddress, uint256 sId);
    function burn() external;
    function vault() external view returns (uint256 vault);

    // Public functions
    function updateVault() external;
    function totalEthClaimable() external view returns (uint256 claimable);
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}