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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./Sig.sol";

interface IToken {
    function balanceOf(address owner, uint256 id) external returns (uint256);

    function isApprovedForAll(
        address owner,
        address operator
    ) external returns (bool);

    function burnFT(address owner, uint256 tokenID, uint256 quantity) external;

    function mintFT(address to, uint256 tokenID, uint256 quantity) external;

    function mintNFT(address to, uint256 tokenID) external;

    function batchMintNFT(address to, uint256[] calldata ids) external;
}

contract Break is Ownable {
    address private _token;
    address private _signer;

    event SignatureConsumed(bytes32 indexed from, bytes32 indexed sigHash);

    mapping(bytes32 => bytes32) public lastSigUsed;

    function setTokenAddress(address addr) public onlyOwner {
        _token = addr;
    }

    function getToken() public view returns (address) {
        return _token;
    }

    function setSignerAddress(address addr) public onlyOwner {
        _signer = addr;
    }

    function getSigner() public view returns (address) {
        return _signer;
    }

    function mintFTs(
        bytes32 from,
        address to,
        uint256 id,
        uint256 qty,
        uint256 expiry,
        bytes32 prevSigHash,
        bytes calldata sig
    ) public {
        IToken token = IToken(_token);

        require(to != address(0), "Destination cannot be null address.");

        require(
            verify(
                sig,
                keccak256(abi.encode(from, id, qty, expiry, prevSigHash)),
                _signer
            ),
            "Signature mismatch."
        );

        require(
            lastSigUsed[from] == prevSigHash,
            "Wrong previous signature supplied."
        );

        require(block.timestamp < expiry, "Signature has expired.");

        lastSigUsed[from] = keccak256(sig);

        token.mintFT(to, id, qty);

        emit SignatureConsumed(from, keccak256(sig));
    }

    function mintNFTs(
        bytes32 from,
        address to,
        uint256 burn,
        uint256 burnQty,
        uint256[] calldata mints,
        uint256 expiry,
        bytes32 prevSigHash,
        bytes calldata sig
    ) public {
        IToken token = IToken(_token);

        require(to != address(0), "Destination cannot be null address.");

        if (burnQty > 0) {
            require(
                token.isApprovedForAll(_msgSender(), address(this)),
                "Approval required"
            );
        }

        require(
            verify(
                sig,
                keccak256(
                    abi.encode(
                        from,
                        burn,
                        burnQty,
                        keccak256(abi.encodePacked(mints)),
                        expiry,
                        prevSigHash
                    )
                ),
                _signer
            ),
            "Signature mismatch."
        );

        require(
            lastSigUsed[from] == prevSigHash,
            "Wrong previous signature supplied."
        );

        require(block.timestamp < expiry, "Signature has expired.");

        lastSigUsed[from] = keccak256(sig);

        if (burnQty > 0) {
            token.burnFT(_msgSender(), burn, burnQty);
        }

        token.batchMintNFT(to, mints);

        emit SignatureConsumed(from, keccak256(sig));
    }

    function verify(
        bytes memory sig,
        bytes32 hash,
        address signer
    ) internal pure returns (bool) {
        return Sig.verify(sig, hash, signer);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

library Sig {
    function verify(
        bytes memory signature,
        bytes32 digestHash,
        address expected
    ) internal pure returns (bool) {
        address std = getSigner(signature, digestHash);
        if (std == expected) {
            return true;
        }

        address packed = getSignerPacked(signature, digestHash);
        if (packed == expected) {
            return true;
        }

        return false;
    }

    function getSigner(
        bytes memory signature,
        bytes32 digestHash
    ) internal pure returns (address) {
        (bytes32 r, bytes32 s, uint8 v) = splitSignature(signature);

        bytes32 signed = getMessageHash(digestHash);
        return ecrecover(signed, v, r, s);
    }

    function getSignerPacked(
        bytes memory signature,
        bytes32 digestHash
    ) internal pure returns (address) {
        (bytes32 r, bytes32 s, uint8 v) = splitSignature(signature);

        bytes32 signed = getMessageHashPacked(digestHash);
        return ecrecover(signed, v, r, s);
    }

    function getMessageHash(
        bytes32 digestHash
    ) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encode("\x19Ethereum Signed Message:\n32", digestHash)
            );
    }

    function getMessageHashPacked(
        bytes32 digestHash
    ) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked("\x19Ethereum Signed Message:\n32", digestHash)
            );
    }

    function splitSignature(
        bytes memory sig
    ) internal pure returns (bytes32 r, bytes32 s, uint8 v) {
        require(sig.length == 65, "invalid signature length");

        assembly {
            /*
            First 32 bytes stores the length of the signature

            add(sig, 32) = pointer of sig + 32
            effectively, skips first 32 bytes of signature

            mload(p) loads next 32 bytes starting at the memory address p into memory
            */

            // first 32 bytes, after the length prefix
            r := mload(add(sig, 32))
            // second 32 bytes
            s := mload(add(sig, 64))
            // final byte (first byte of the next 32 bytes)
            v := byte(0, mload(add(sig, 96)))
        }

        // implicitly return (r, s, v)
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"from","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"sigHash","type":"bytes32"}],"name":"SignatureConsumed","type":"event"},{"inputs":[],"name":"getSigner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"lastSigUsed","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"from","type":"bytes32"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"qty","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"bytes32","name":"prevSigHash","type":"bytes32"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"mintFTs","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"from","type":"bytes32"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"burn","type":"uint256"},{"internalType":"uint256","name":"burnQty","type":"uint256"},{"internalType":"uint256[]","name":"mints","type":"uint256[]"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"bytes32","name":"prevSigHash","type":"bytes32"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"mintNFTs","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"setSignerAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"setTokenAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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