// File: @openzeppelin/contracts/access/AccessControl.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// File: @openzeppelin/contracts/access/IAccessControl.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// 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;
    }
}

// File: @openzeppelin/contracts/utils/cryptography/ECDSA.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: @openzeppelin/contracts/utils/math/Math.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// File: @openzeppelin/contracts/utils/Strings.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

// File: contracts/Diverge.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.15;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "./libraries/ERC1155/ERC1155PS.sol";
import "./libraries/ERC2981/ERC2981Base.sol";

/*
 *   @title: Diverge

 *  @author: ahm3d.eth, ryado.eth
 *
 *        Built with ♥ by the ProductShop team
 *
 *                  -+=-.
 *                 .++++++=-.
 *                 +++++++++++=-.
 *                ++++++++++++++++=:.
 *               =++++++==++++++++++++=:.
 *              :++++++=   .:=++++++++++++-:.
 *             .+++++++        .-=++++++++++++-:
 *             +++++++.            .-=++++++++++
 *            =++++++:                 :=+++++++
 *           -++++++-                :-+++++++++
 *          :++++++=             .-=+++++++++++-
 *         .+++++++          .:=+++++++++++=:.
 *         +++++++.       :-++++++++++++-.
 *        =++++++:    .-=+++++++++++=:
 *       -++++++=    +++++++++++=:.
 *      :++++++=     ++++++++-.
 *     .+++++++      ++++=:
 *     =++++++.      --.
 *    =++++++-
 *   -++++++=
 *  .++++++=
 *  +++++++.
 *
 */

contract Diverge is ERC1155PS, ERC2981Base, AccessControl {
  using Strings for uint256;

  bytes32 public constant ADMIN_ROLE = keccak256("ADMIN_ROLE");
  address public _couponSigner; // Address of the wallet that generates the coupons

  string public _baseURI = "";
  string public _contractMetadata = "";

  uint256 public _currentTokenTypeID = 0; // Used to keep track of the number of different NFTs
  uint256 public _mintPrice = 0 ether; // Presale mint price is free
  uint256 public _maxPublicMintPerTx = 4; // Maximum number of NFTs that can be minted at once

  mapping(uint256 => uint256) public _tokenSupply;
  mapping(uint256 => uint256) public _tokenMaxSupply;

  bool public _paused = true;
  bool public _presaleMintActive = false;
  bool public _publicMintActive = false;

  RoyaltyInfo public _royalties;

  struct Coupon {
    bytes32 r;
    bytes32 s;
    uint8 v;
  }

  constructor(address couponSigner) ERC1155PS("") {
    _couponSigner = couponSigner;
    _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
    _setupRole(ADMIN_ROLE, msg.sender);
  }

  // modifiers
  modifier onlyAdmin() {
    require(hasRole(ADMIN_ROLE, msg.sender), "Caller is not an Admin");
    _;
  }

  modifier noContractCaller() {
    require(tx.origin == msg.sender, "Caller is another contract");
    _;
  }

  modifier isNotPaused() {
    require(!_paused, "The contract is paused");
    _;
  }

  modifier tokenTypeExists(uint256 tokenId) {
    require(_tokenMaxSupply[tokenId] > 0, "Token does not exist");
    _;
  }

  modifier mintSupplyCompliant(uint256 tokenId, uint256 quantity) {
    require(quantity != 0, "Quantity must be greater than 0");

    require(
      _tokenSupply[tokenId] + quantity <= _tokenMaxSupply[tokenId],
      "Mint quantity is restricted by token max supply"
    );
    _;
  }

  // External functions

  /**
   * * Mint Presale Tokens
   * @dev Minting function for tokens available during the Presale phase
   * @notice Minting Presale tokens requires a valid coupon, associated with wallet and allotted amount
   * @param typeId The typeId of the token being minted
   * @param quantity The number of tokens being minted by sender
   * @param allotted The allotted number of tokens specified in the Presale Coupon
   * @param coupon The signed coupon
   */
  function presaleMint(
    uint256 typeId,
    uint256 allotted,
    Coupon calldata coupon,
    uint256 quantity
  )
    external
    noContractCaller
    isNotPaused
    tokenTypeExists(typeId)
    mintSupplyCompliant(typeId, quantity)
  {
    require(_presaleMintActive, "Presale mint phase is not active");

    require(
      quantity < allotted + 1,
      "Quantity must be less or equal to allotted"
    );

    require(quantityMinted(typeId, _msgSender()) == 0, "Coupon already used");

    bytes32 digest = keccak256(abi.encode(allotted, _msgSender()));

    require(_isVerifiedCoupon(digest, coupon), "Invalid Coupon");

    _tokenSupply[typeId] = _tokenSupply[typeId] + quantity;
    _mint(msg.sender, typeId, quantity);
  }

  /**
   * * Mint Presale Tokens
   * @dev Minting function for tokens available during the Presale phase
   * @notice Initial public mint will be free but subsequent mints will be at the setted mint price
   * @param typeId The typeId of the token being minted
   * @param quantity The number of tokens being minted by sender
   */
  function mint(
    uint256 typeId,
    uint256 quantity
  )
    public
    payable
    isNotPaused
    tokenTypeExists(typeId)
    mintSupplyCompliant(typeId, quantity)
  {
    require(_publicMintActive, "Public mint phase is not active");
    require(
      quantity < _maxPublicMintPerTx + 1,
      "Quantity must be less or equal to max public mint quantity"
    );
    require(msg.value == quantity * _mintPrice, "Incorrect Payment");

    _tokenSupply[typeId] = _tokenSupply[typeId] + quantity;
    _mint(msg.sender, typeId, quantity);
  }

  function mintOnBehalf(
    uint256 typeId,
    uint256 quantity,
    address beneficiary
  )
    public
    tokenTypeExists(typeId)
    mintSupplyCompliant(typeId, quantity)
    onlyAdmin
  {
    _tokenSupply[typeId] = _tokenSupply[typeId] + quantity;
    _mint(beneficiary, typeId, quantity);
  }

  /**
   * @dev Creates a new token type
   * @return The newly created token ID
   */
  function create(uint256 maxSupply) external onlyAdmin returns (uint256) {
    uint256 _id = _getNextTokenTypeID();
    _incrementTokenTypeId();
    _tokenMaxSupply[_id] = maxSupply;
    return _id;
  }

  function royaltyInfo(
    uint256,
    uint256 value
  ) external view override returns (address receiver, uint256 royaltyAmount) {
    RoyaltyInfo memory royalties = _royalties;
    receiver = royalties.recipient;
    royaltyAmount = (value * royalties.amount) / 10000;
  }

  //  Setters

  /**
   * @dev Sets token royalties
   * @param recipient recipient of the royalties
   * @param value percentage (using 2 decimals : 10000 = 100%, 0 = 0%)
   */

  function setRoyalties(address recipient, uint256 value) external onlyAdmin {
    require(value <= 10000, "ERC2981Royalties: Too high");
    _royalties = RoyaltyInfo(recipient, uint24(value));
  }

  function setPublicMintActive(bool active) external onlyAdmin {
    _publicMintActive = active;
  }

  function setPresaleMintActive(bool active) external onlyAdmin {
    _presaleMintActive = active;
  }

  function setMintPrice(uint256 value) external onlyAdmin {
    _mintPrice = value;
  }

  function setMaxPublicMintPerTx(uint256 value) external onlyAdmin {
    _maxPublicMintPerTx = value;
  }

  function grantAdminRole(address user) external onlyAdmin {
    grantRole(ADMIN_ROLE, user);
  }

  function setPaused(bool paused) external onlyAdmin {
    _paused = paused;
  }

  function setBaseURI(string calldata baseURI) external onlyAdmin {
    _baseURI = baseURI;
  }

  function setContractMetadata(
    string calldata contractMetadata
  ) external onlyAdmin {
    _contractMetadata = contractMetadata;
  }

  function setCouponSigner(address newCouponSigner) external onlyAdmin {
    _couponSigner = newCouponSigner;
  }

  /**
   * @dev Set the quantity minted value for a user, for testing mostly
   * @param typeId uint256 ID of the token type
   * @param user address of the user to set the quantity minted
   * @param quantiy uint128 quantity minted value
   */
  function setQuantityMinted(
    uint256 typeId,
    address user,
    uint128 quantiy
  ) external onlyAdmin {
    _setQuantityMinted(typeId, user, quantiy);
  }

  function setTokenMaxSupply(
    uint256 typeId,
    uint256 maxSupply
  ) external onlyAdmin {
    _tokenMaxSupply[typeId] = maxSupply;
  }

  function withdraw() external onlyAdmin {
    payable(msg.sender).transfer(address(this).balance);
  }

  // Public functions

  function uri(
    uint256 typeId
  ) public view override tokenTypeExists(typeId) returns (string memory) {
    return string(abi.encodePacked(_baseURI, typeId.toString(), ".json"));
  }

  /**
   * @dev Returns the total quantity for a type of token
   * @param typeId uint256 ID of the token type to query
   * @return amount of token of type typeId in existence
   */
  function totalSupply(uint256 typeId) public view returns (uint256) {
    return _tokenSupply[typeId];
  }

  function contractURI() public view returns (string memory) {
    return _contractMetadata;
  }

  function supportsInterface(
    bytes4 interfaceId
  )
    public
    view
    virtual
    override(ERC1155PS, ERC2981Base, AccessControl)
    returns (bool)
  {
    return super.supportsInterface(interfaceId);
  }

  // Internal functions

  /**
   * * Verify Coupon
   * @dev Verify that the coupon sent was signed by the coupon signer and is a valid coupon
   * @notice Valid coupons will include coupon signer, address, and allotted mints
   * @notice Returns a boolean value
   * @param digest The digest
   * @param coupon The coupon
   */
  function _isVerifiedCoupon(
    bytes32 digest,
    Coupon calldata coupon
  ) private view returns (bool) {
    address signer = ecrecover(digest, coupon.v, coupon.r, coupon.s);
    require(signer != address(0), "Zero Address");
    return signer == _couponSigner;
  }

  // Private functions

  /**
   * @dev calculates the next token ID based on value of _currentTokenID
   * @return uint256 for the next token ID
   */
  function _getNextTokenTypeID() private view returns (uint256) {
    return _currentTokenTypeID + 1;
  }

  /**
   * @dev increments the value of _currentTokenID
   */
  function _incrementTokenTypeId() private {
    ++_currentTokenTypeID;
  }
}

// File: contracts/libraries/ERC1155/ERC1155PS.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC1155.sol";
import "./IERC1155Receiver.sol";
import "./extensions/IERC1155MetadataURI.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";

/**
 * @dev Implementation of the basic standard multi-token from the ProductShop Team
 * See https://eips.ethereum.org/EIPS/eip-1155
 * Originally based on: OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/ERC1155.sol)
 */
contract ERC1155PS is Context, ERC165, IERC1155, IERC1155MetadataURI {
  using Address for address;

  struct AddressData {
    uint128 balance;
    uint128 quantityMinted;
  }

  // Mapping from token ID to owner address data
  mapping(uint256 => mapping(address => AddressData)) private _addressData;

  // Mapping from account to operator approvals
  mapping(address => mapping(address => bool)) private _operatorApprovals;

  // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
  string private _uri;

  /**
   * @dev See {_setURI}.
   */
  constructor(string memory uri_) {
    _setURI(uri_);
  }

  /**
   * @dev See {IERC165-supportsInterface}.
   */
  function supportsInterface(bytes4 interfaceId)
    public
    view
    virtual
    override(ERC165, IERC165)
    returns (bool)
  {
    return
      interfaceId == type(IERC1155).interfaceId ||
      interfaceId == type(IERC1155MetadataURI).interfaceId ||
      super.supportsInterface(interfaceId);
  }

  /**
   * @dev See {IERC1155MetadataURI-uri}.
   *
   * This implementation returns the same URI for *all* token types. It relies
   * on the token type ID substitution mechanism
   * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
   *
   * Clients calling this function must replace the `\{id\}` substring with the
   * actual token type ID.
   */
  function uri(uint256) public view virtual override returns (string memory) {
    return _uri;
  }

  /**
   * @dev See {IERC1155-balanceOf}.
   *
   * Requirements:
   *
   * - `account` cannot be the zero address.
   */
  function balanceOf(address account, uint256 id)
    public
    view
    virtual
    override
    returns (uint256)
  {
    require(
      account != address(0),
      "ERC1155: address zero is not a valid owner"
    );
    return _addressData[id][account].balance;
  }

  function quantityMinted(uint256 id, address owner)
    public
    view
    returns (uint256)
  {
    require(
      owner != address(0),
      "ERC721A: number minted query for the zero address"
    );
    return _addressData[id][owner].quantityMinted;
  }

  function _setQuantityMinted(
    uint256 id,
    address owner,
    uint256 newQtyMinted
  ) internal {
    require(
      owner != address(0),
      "ERC721A: number minted query for the zero address"
    );
    _addressData[id][owner].quantityMinted = uint128(newQtyMinted);
  }

  /**
   * @dev See {IERC1155-balanceOfBatch}.
   *
   * Requirements:
   *
   * - `accounts` and `ids` must have the same length.
   */
  function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
    public
    view
    virtual
    override
    returns (uint256[] memory)
  {
    require(
      accounts.length == ids.length,
      "ERC1155: accounts and ids length mismatch"
    );

    uint256[] memory batchBalances = new uint256[](accounts.length);

    for (uint256 i = 0; i < accounts.length; ++i) {
      batchBalances[i] = balanceOf(accounts[i], ids[i]);
    }

    return batchBalances;
  }

  /**
   * @dev See {IERC1155-setApprovalForAll}.
   */
  function setApprovalForAll(address operator, bool approved)
    public
    virtual
    override
  {
    _setApprovalForAll(_msgSender(), operator, approved);
  }

  /**
   * @dev See {IERC1155-isApprovedForAll}.
   */
  function isApprovedForAll(address account, address operator)
    public
    view
    virtual
    override
    returns (bool)
  {
    return _operatorApprovals[account][operator];
  }

  /**
   * @dev See {IERC1155-safeTransferFrom}.
   */
  function safeTransferFrom(
    address from,
    address to,
    uint256 id,
    uint256 amount,
    bytes memory data
  ) public virtual override {
    require(
      from == _msgSender() || isApprovedForAll(from, _msgSender()),
      "ERC1155: caller is not token owner nor approved"
    );
    _safeTransferFrom(from, to, id, amount, data);
  }

  /**
   * @dev See {IERC1155-safeBatchTransferFrom}.
   */
  function safeBatchTransferFrom(
    address from,
    address to,
    uint256[] memory ids,
    uint256[] memory amounts,
    bytes memory data
  ) public virtual override {
    require(
      from == _msgSender() || isApprovedForAll(from, _msgSender()),
      "ERC1155: caller is not token owner nor approved"
    );
    _safeBatchTransferFrom(from, to, ids, amounts, data);
  }

  /**
   * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
   *
   * Emits a {TransferSingle} event.
   *
   * Requirements:
   *
   * - `to` cannot be the zero address.
   * - `from` must have a balance of tokens of type `id` of at least `amount`.
   * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
   * acceptance magic value.
   */
  function _safeTransferFrom(
    address from,
    address to,
    uint256 id,
    uint256 amount,
    bytes memory data
  ) internal virtual {
    require(to != address(0), "ERC1155: transfer to the zero address");

    address operator = _msgSender();
    uint256[] memory ids = _asSingletonArray(id);
    uint256[] memory amounts = _asSingletonArray(amount);

    _beforeTokenTransfer(operator, from, to, ids, amounts, data);

    uint128 fromBalance = _addressData[id][from].balance;
    require(
      fromBalance >= amount,
      "ERC1155: insufficient balance for transfer"
    );
    unchecked {
      _addressData[id][from].balance = fromBalance - uint128(amount);
    }
    _addressData[id][to].balance += uint128(amount);

    emit TransferSingle(operator, from, to, id, amount);

    _afterTokenTransfer(operator, from, to, ids, amounts, data);

    _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
  }

  /**
   * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
   *
   * Emits a {TransferBatch} event.
   *
   * Requirements:
   *
   * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
   * acceptance magic value.
   */
  function _safeBatchTransferFrom(
    address from,
    address to,
    uint256[] memory ids,
    uint256[] memory amounts,
    bytes memory data
  ) internal virtual {
    require(
      ids.length == amounts.length,
      "ERC1155: ids and amounts length mismatch"
    );
    require(to != address(0), "ERC1155: transfer to the zero address");

    address operator = _msgSender();

    _beforeTokenTransfer(operator, from, to, ids, amounts, data);

    for (uint256 i = 0; i < ids.length; ++i) {
      uint256 id = ids[i];
      uint128 amount = uint128(amounts[i]);

      uint128 fromBalance = _addressData[id][from].balance;
      require(
        fromBalance >= amount,
        "ERC1155: insufficient balance for transfer"
      );
      unchecked {
        _addressData[id][from].balance = fromBalance - amount;
      }
      _addressData[id][to].balance += amount;
    }

    emit TransferBatch(operator, from, to, ids, amounts);

    _afterTokenTransfer(operator, from, to, ids, amounts, data);

    _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
  }

  /**
   * @dev Sets a new URI for all token types, by relying on the token type ID
   * substitution mechanism
   * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
   *
   * By this mechanism, any occurrence of the `\{id\}` substring in either the
   * URI or any of the amounts in the JSON file at said URI will be replaced by
   * clients with the token type ID.
   *
   * For example, the `https://token-cdn-domain/\{id\}.json` URI would be
   * interpreted by clients as
   * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
   * for token type ID 0x4cce0.
   *
   * See {uri}.
   *
   * Because these URIs cannot be meaningfully represented by the {URI} event,
   * this function emits no events.
   */
  function _setURI(string memory newuri) internal virtual {
    _uri = newuri;
  }

  /**
   * @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
   *
   * Emits a {TransferSingle} event.
   *
   * Requirements:
   *
   * - `to` cannot be the zero address.
   * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
   * acceptance magic value.
   */
  function _mint(
    address to,
    uint256 id,
    uint256 amount
  ) internal virtual {
    _addressData[id][to].balance += uint128(amount);
    _addressData[id][to].quantityMinted += uint128(amount);
    emit TransferSingle(msg.sender, address(0), to, id, amount);
  }

  /**
   * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
   *
   * Emits a {TransferBatch} event.
   *
   * Requirements:
   *
   * - `ids` and `amounts` must have the same length.
   * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
   * acceptance magic value.
   */
  function _mintBatch(
    address to,
    uint256[] memory ids,
    uint256[] memory amounts,
    bytes memory data
  ) internal virtual {
    require(to != address(0), "ERC1155: mint to the zero address");
    require(
      ids.length == amounts.length,
      "ERC1155: ids and amounts length mismatch"
    );

    address operator = _msgSender();

    _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

    for (uint256 i = 0; i < ids.length; i++) {
      _addressData[ids[i]][to].balance += uint128(amounts[i]);
      // _addressData[ids[i]][to].quantityMinted += uint128(amounts[i]);
    }

    emit TransferBatch(operator, address(0), to, ids, amounts);

    _afterTokenTransfer(operator, address(0), to, ids, amounts, data);

    _doSafeBatchTransferAcceptanceCheck(
      operator,
      address(0),
      to,
      ids,
      amounts,
      data
    );
  }

  /**
   * @dev Destroys `amount` tokens of token type `id` from `from`
   *
   * Emits a {TransferSingle} event.
   *
   * Requirements:
   *
   * - `from` cannot be the zero address.
   * - `from` must have at least `amount` tokens of token type `id`.
   */
  function _burn(
    address from,
    uint256 id,
    uint256 amount
  ) internal virtual {
    require(from != address(0), "ERC1155: burn from the zero address");

    address operator = _msgSender();
    uint256[] memory ids = _asSingletonArray(id);
    uint256[] memory amounts = _asSingletonArray(amount);

    _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

    uint128 fromBalance = _addressData[id][from].balance;
    require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
    unchecked {
      _addressData[id][from].balance = fromBalance - uint128(amount);
    }

    emit TransferSingle(operator, from, address(0), id, amount);

    _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
  }

  /**
   * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
   *
   * Emits a {TransferBatch} event.
   *
   * Requirements:
   *
   * - `ids` and `amounts` must have the same length.
   */
  function _burnBatch(
    address from,
    uint256[] memory ids,
    uint256[] memory amounts
  ) internal virtual {
    require(from != address(0), "ERC1155: burn from the zero address");
    require(
      ids.length == amounts.length,
      "ERC1155: ids and amounts length mismatch"
    );

    address operator = _msgSender();

    _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

    for (uint256 i = 0; i < ids.length; i++) {
      uint256 id = ids[i];
      uint128 amount = uint128(amounts[i]);

      uint128 fromBalance = _addressData[id][from].balance;
      require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
      unchecked {
        _addressData[id][from].balance = fromBalance - amount;
      }
    }

    emit TransferBatch(operator, from, address(0), ids, amounts);

    _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
  }

  /**
   * @dev Approve `operator` to operate on all of `owner` tokens
   *
   * Emits an {ApprovalForAll} event.
   */
  function _setApprovalForAll(
    address owner,
    address operator,
    bool approved
  ) internal virtual {
    require(owner != operator, "ERC1155: setting approval status for self");
    _operatorApprovals[owner][operator] = approved;
    emit ApprovalForAll(owner, operator, approved);
  }

  /**
   * @dev Hook that is called before any token transfer. This includes minting
   * and burning, as well as batched variants.
   *
   * The same hook is called on both single and batched variants. For single
   * transfers, the length of the `ids` and `amounts` arrays will be 1.
   *
   * Calling conditions (for each `id` and `amount` pair):
   *
   * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
   * of token type `id` will be  transferred to `to`.
   * - When `from` is zero, `amount` tokens of token type `id` will be minted
   * for `to`.
   * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
   * will be burned.
   * - `from` and `to` are never both zero.
   * - `ids` and `amounts` have the same, non-zero length.
   *
   * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
   */
  function _beforeTokenTransfer(
    address operator,
    address from,
    address to,
    uint256[] memory ids,
    uint256[] memory amounts,
    bytes memory data
  ) internal virtual {}

  /**
   * @dev Hook that is called after any token transfer. This includes minting
   * and burning, as well as batched variants.
   *
   * The same hook is called on both single and batched variants. For single
   * transfers, the length of the `id` and `amount` arrays will be 1.
   *
   * Calling conditions (for each `id` and `amount` pair):
   *
   * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
   * of token type `id` will be  transferred to `to`.
   * - When `from` is zero, `amount` tokens of token type `id` will be minted
   * for `to`.
   * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
   * will be burned.
   * - `from` and `to` are never both zero.
   * - `ids` and `amounts` have the same, non-zero length.
   *
   * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
   */
  function _afterTokenTransfer(
    address operator,
    address from,
    address to,
    uint256[] memory ids,
    uint256[] memory amounts,
    bytes memory data
  ) internal virtual {}

  function _doSafeTransferAcceptanceCheck(
    address operator,
    address from,
    address to,
    uint256 id,
    uint256 amount,
    bytes memory data
  ) private {
    if (to.isContract()) {
      try
        IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data)
      returns (bytes4 response) {
        if (response != IERC1155Receiver.onERC1155Received.selector) {
          revert("ERC1155: ERC1155Receiver rejected tokens");
        }
      } catch Error(string memory reason) {
        revert(reason);
      } catch {
        revert("ERC1155: transfer to non ERC1155Receiver implementer");
      }
    }
  }

  function _doSafeBatchTransferAcceptanceCheck(
    address operator,
    address from,
    address to,
    uint256[] memory ids,
    uint256[] memory amounts,
    bytes memory data
  ) private {
    if (to.isContract()) {
      try
        IERC1155Receiver(to).onERC1155BatchReceived(
          operator,
          from,
          ids,
          amounts,
          data
        )
      returns (bytes4 response) {
        if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
          revert("ERC1155: ERC1155Receiver rejected tokens");
        }
      } catch Error(string memory reason) {
        revert(reason);
      } catch {
        revert("ERC1155: transfer to non ERC1155Receiver implementer");
      }
    }
  }

  function _asSingletonArray(uint256 element)
    private
    pure
    returns (uint256[] memory)
  {
    uint256[] memory array = new uint256[](1);
    array[0] = element;

    return array;
  }
}

// File: contracts/libraries/ERC1155/extensions/IERC1155MetadataURI.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)

pragma solidity ^0.8.0;

import "../IERC1155.sol";

/**
 * @dev Interface of the optional ERC1155MetadataExtension interface, as defined
 * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155MetadataURI is IERC1155 {
    /**
     * @dev Returns the URI for token type `id`.
     *
     * If the `\{id\}` substring is present in the URI, it must be replaced by
     * clients with the actual token type ID.
     */
    function uri(uint256 id) external view returns (string memory);
}

// File: contracts/libraries/ERC1155/IERC1155.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
  /**
   * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
   */
  event TransferSingle(
    address indexed operator,
    address indexed from,
    address indexed to,
    uint256 id,
    uint256 value
  );

  /**
   * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
   * transfers.
   */
  event TransferBatch(
    address indexed operator,
    address indexed from,
    address indexed to,
    uint256[] ids,
    uint256[] values
  );

  /**
   * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
   * `approved`.
   */
  event ApprovalForAll(
    address indexed account,
    address indexed operator,
    bool approved
  );

  /**
   * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
   *
   * If an {URI} event was emitted for `id`, the standard
   * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
   * returned by {IERC1155MetadataURI-uri}.
   */
  event URI(string value, uint256 indexed id);

  /**
   * @dev Returns the amount of tokens of token type `id` owned by `account`.
   *
   * Requirements:
   *
   * - `account` cannot be the zero address.
   */
  function balanceOf(address account, uint256 id)
    external
    view
    returns (uint256);

  /**
   * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
   *
   * Requirements:
   *
   * - `accounts` and `ids` must have the same length.
   */
  function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
    external
    view
    returns (uint256[] memory);

  /**
   * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
   *
   * Emits an {ApprovalForAll} event.
   *
   * Requirements:
   *
   * - `operator` cannot be the caller.
   */
  function setApprovalForAll(address operator, bool approved) external;

  /**
   * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
   *
   * See {setApprovalForAll}.
   */
  function isApprovedForAll(address account, address operator)
    external
    view
    returns (bool);

  /**
   * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
   *
   * Emits a {TransferSingle} event.
   *
   * Requirements:
   *
   * - `to` cannot be the zero address.
   * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
   * - `from` must have a balance of tokens of type `id` of at least `amount`.
   * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
   * acceptance magic value.
   */
  function safeTransferFrom(
    address from,
    address to,
    uint256 id,
    uint256 amount,
    bytes calldata data
  ) external;

  /**
   * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
   *
   * Emits a {TransferBatch} event.
   *
   * Requirements:
   *
   * - `ids` and `amounts` must have the same length.
   * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
   * acceptance magic value.
   */
  function safeBatchTransferFrom(
    address from,
    address to,
    uint256[] calldata ids,
    uint256[] calldata amounts,
    bytes calldata data
  ) external;
}

// File: contracts/libraries/ERC1155/IERC1155Receiver.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
  /**
   * @dev Handles the receipt of a single ERC1155 token type. This function is
   * called at the end of a `safeTransferFrom` after the balance has been updated.
   *
   * NOTE: To accept the transfer, this must return
   * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
   * (i.e. 0xf23a6e61, or its own function selector).
   *
   * @param operator The address which initiated the transfer (i.e. msg.sender)
   * @param from The address which previously owned the token
   * @param id The ID of the token being transferred
   * @param value The amount of tokens being transferred
   * @param data Additional data with no specified format
   * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
   */
  function onERC1155Received(
    address operator,
    address from,
    uint256 id,
    uint256 value,
    bytes calldata data
  ) external returns (bytes4);

  /**
   * @dev Handles the receipt of a multiple ERC1155 token types. This function
   * is called at the end of a `safeBatchTransferFrom` after the balances have
   * been updated.
   *
   * NOTE: To accept the transfer(s), this must return
   * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
   * (i.e. 0xbc197c81, or its own function selector).
   *
   * @param operator The address which initiated the batch transfer (i.e. msg.sender)
   * @param from The address which previously owned the token
   * @param ids An array containing ids of each token being transferred (order and length must match values array)
   * @param values An array containing amounts of each token being transferred (order and length must match ids array)
   * @param data Additional data with no specified format
   * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
   */
  function onERC1155BatchReceived(
    address operator,
    address from,
    uint256[] calldata ids,
    uint256[] calldata values,
    bytes calldata data
  ) external returns (bytes4);
}

// File: contracts/libraries/ERC2981/ERC2981Base.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '@openzeppelin/contracts/utils/introspection/ERC165.sol';

import './IERC2981Royalties.sol';

/// @dev This is a contract used to add ERC2981 support to ERC721 and 1155
abstract contract ERC2981Base is ERC165, IERC2981Royalties {
    struct RoyaltyInfo {
        address recipient;
        uint24 amount;
    }

    /// @inheritdoc	ERC165
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override
        returns (bool)
    {
        return
            interfaceId == type(IERC2981Royalties).interfaceId ||
            super.supportsInterface(interfaceId);
    }
}
// File: contracts/libraries/ERC2981/IERC2981Royalties.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title IERC2981Royalties
/// @dev Interface for the ERC2981 - Token Royalty standard
interface IERC2981Royalties {
    /// @notice Called with the sale price to determine how much royalty
    //          is owed and to whom.
    /// @param _tokenId - the NFT asset queried for royalty information
    /// @param _value - the sale price of the NFT asset specified by _tokenId
    /// @return _receiver - address of who should be sent the royalty payment
    /// @return _royaltyAmount - the royalty payment amount for value sale price
    function royaltyInfo(uint256 _tokenId, uint256 _value)
        external
        view
        returns (address _receiver, uint256 _royaltyAmount);
}