Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta

More Options

• Similar
• Submit Audit
• Compare

// SPDX-FileCopyrightText: © Courtyard Inc. (https://courtyard.io)
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./TokenMintCheckoutBase.sol";

/**
 * @title TokenVendingMachine is a base implementation of TokenMintCheckoutBase.
 */ 
contract TokenVendingMachine is TokenMintCheckoutBase {

    constructor(string memory name) TokenMintCheckoutBase(name) {}

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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, _msgSender());
        _;
    }

    /**
     * @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 override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @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 {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " 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 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.
     */
    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.
     */
    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`.
     */
    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.
     *
     * [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.
     */
    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.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

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

pragma solidity ^0.8.0;

import "./IAccessControlEnumerable.sol";
import "./AccessControl.sol";
import "../utils/structs/EnumerableSet.sol";

/**
 * @dev Extension of {AccessControl} that allows enumerating the members of each role.
 */
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
    using EnumerableSet for EnumerableSet.AddressSet;

    mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;

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

    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) public view override returns (address) {
        return _roleMembers[role].at(index);
    }

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) public view override returns (uint256) {
        return _roleMembers[role].length();
    }

    /**
     * @dev Overload {_grantRole} to track enumerable memberships
     */
    function _grantRole(bytes32 role, address account) internal virtual override {
        super._grantRole(role, account);
        _roleMembers[role].add(account);
    }

    /**
     * @dev Overload {_revokeRole} to track enumerable memberships
     */
    function _revokeRole(bytes32 role, address account) internal virtual override {
        super._revokeRole(role, account);
        _roleMembers[role].remove(account);
    }
}

// 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;
}

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerable is IAccessControl {
    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

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

pragma solidity ^0.8.0;

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// 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: MIT
// OpenZeppelin Contracts v4.4.1 (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
    }

    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");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' 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) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        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.
            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 if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } 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;
        uint8 v;
        assembly {
            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
            v := add(shr(255, vs), 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 (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // 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));
    }
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Checker.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Library used to query support of an interface declared via {IERC165}.
 *
 * Note that these functions return the actual result of the query: they do not
 * `revert` if an interface is not supported. It is up to the caller to decide
 * what to do in these cases.
 */
library ERC165Checker {
    // As per the EIP-165 spec, no interface should ever match 0xffffffff
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;

    /**
     * @dev Returns true if `account` supports the {IERC165} interface,
     */
    function supportsERC165(address account) internal view returns (bool) {
        // Any contract that implements ERC165 must explicitly indicate support of
        // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
        return
            _supportsERC165Interface(account, type(IERC165).interfaceId) &&
            !_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
    }

    /**
     * @dev Returns true if `account` supports the interface defined by
     * `interfaceId`. Support for {IERC165} itself is queried automatically.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        // query support of both ERC165 as per the spec and support of _interfaceId
        return supportsERC165(account) && _supportsERC165Interface(account, interfaceId);
    }

    /**
     * @dev Returns a boolean array where each value corresponds to the
     * interfaces passed in and whether they're supported or not. This allows
     * you to batch check interfaces for a contract where your expectation
     * is that some interfaces may not be supported.
     *
     * See {IERC165-supportsInterface}.
     *
     * _Available since v3.4._
     */
    function getSupportedInterfaces(address account, bytes4[] memory interfaceIds)
        internal
        view
        returns (bool[] memory)
    {
        // an array of booleans corresponding to interfaceIds and whether they're supported or not
        bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);

        // query support of ERC165 itself
        if (supportsERC165(account)) {
            // query support of each interface in interfaceIds
            for (uint256 i = 0; i < interfaceIds.length; i++) {
                interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
            }
        }

        return interfaceIdsSupported;
    }

    /**
     * @dev Returns true if `account` supports all the interfaces defined in
     * `interfaceIds`. Support for {IERC165} itself is queried automatically.
     *
     * Batch-querying can lead to gas savings by skipping repeated checks for
     * {IERC165} support.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        // query support of ERC165 itself
        if (!supportsERC165(account)) {
            return false;
        }

        // query support of each interface in _interfaceIds
        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!_supportsERC165Interface(account, interfaceIds[i])) {
                return false;
            }
        }

        // all interfaces supported
        return true;
    }

    /**
     * @notice Query if a contract implements an interface, does not check ERC165 support
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return true if the contract at account indicates support of the interface with
     * identifier interfaceId, false otherwise
     * @dev Assumes that account contains a contract that supports ERC165, otherwise
     * the behavior of this method is undefined. This precondition can be checked
     * with {supportsERC165}.
     * Interface identification is specified in ERC-165.
     */
    function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
        bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);
        (bool success, bytes memory result) = account.staticcall{gas: 30000}(encodedParams);
        if (result.length < 32) return false;
        return success && abi.decode(result, (bool));
    }
}

// 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);
}

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @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] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastvalue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastvalue;
                // Update the index for the moved value
                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-FileCopyrightText: © Courtyard Inc. (https://courtyard.io)
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/ERC20PaymentProcessorV2.sol";
import "@openzeppelin/contracts/access/AccessControlEnumerable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol";

/**
 * @author The Courtyard Team
 * @title {TokenMintCheckoutBase} allows checkouts to mint NFTs using a particular ERC20 token (ex: USDC) for the payment.
 * 
 * It works as follows:
 * 
 *  1. A user starts the checkout process in a front-end application off-chain and is ready to pay.
 * 
 *  2. Upon receiving a checkout request, a back-end service would typically generate a {signature} containing the
 *     following information:
 * 
 *      - {operatingContract}: the address of the appropriate checkout contract.
 *      - {checkoutId}: a unique identifier for that checkout. The {checkoutId} is used to guarantee that each checkout
 *        would not be processed multiple times accidentally.
 *      - {expirationTimestamp}: timestamp in seconds from epoch after which the checkout cannot be completed anymore.
 *      - {paymentRecipient}: the account (i.e. address) that will receive the proceeds of the payment.
 *      - {paymentToken}: the payment token (must be an ERC20 token).
 *      - {paymentValue}: a uint256 representing the payment value in the smallest unit of the payment currency.
 *      - {tokenRecipient}: the recipient for the purchased tokens that will be minted.
 *      - {tokenRegistry}: the registry where the purchased tokens will be minted.
 *      - {tokenHashes}: AN array of the hashex (hex proofs) of the tokens that will be minted.
 * 
 *  4. The backend sends the signed data along with a checkout signature back to the front-end application so the transaction
 *     can be executed.
 * 
 *  5. On the front end:
 * 
 *      - If necessary, the user is first prompted to approve the appropriate token allowance to the checkout contract.
 *      - The user is then prompted to sign the checkout transaction.
 * 
 *  6. During the on-chain transaction:
 * 
 *      - If everything is in order according to the checkout contract processing the request, the funds are withdrawn
 *        and sent to the receiver wallet.
 *      - Then the tokens are minted.
 *      - Finally, the {checkoutId} is marked as processed and a {CheckoutSuccess} event is emitted.
 *  
 *  7. The user now has a successful transaction hash that is a "proof of payment" that can be used to retrieve the 
 *    full transaction result on a block explorer, containing all the information relevant to the checkout, including
 *    the emitted events. This is alike a transaction receipt.
 */

interface TokenRegistryInterface {
    function mintToken(address to, bytes32 proofOfIntegrity) external returns (uint256);
}

/**
 * Contract code.
 */
abstract contract TokenMintCheckoutBase is ReentrancyGuard, AccessControlEnumerable, Pausable, ERC20PaymentProcessorV2 {

    event CheckoutSuccess(address indexed caller, string checkoutId);
    event TokenPurchasedAndMinted(
        address indexed mintedToAddress,
        address mintedTokenAddress,
        uint256 mintedTokenId,
        address paymentTokenAddress,
        uint256 paymentAmount
    );

    /**
     * @dev using a struct to encapsulate all the data that is used to encode a checkout signature.
     */
    struct CheckoutRequest {
        address operatingContract;      // the contract that is supposed to process the given request (which should be this.address for a valid request)
        string checkoutId;              // the id of the checkout.
        uint256 expirationTimestamp;    // expiration timestamp of the request.
        address paymentRecipient;       // the recipient of the payment.
        address paymentToken;           // the payment token (must be an ERC20 token).
        uint256 paymentValue;           // the payment value in the smallest unit of the associated currency.
        address tokenRecipient;         // the recipient of the tokens to mint.
        address tokenRegistry;          // the registry where to mint the tokens.
        bytes32[] tokenHashes;          // the bytes32 ids (hex proofs) of the tokens to mint to the recipient.
    }

    string public name;                     // the name of this contract.
    mapping(bytes32 => bool) processed;     // mapping of all the checkouts that were processed to avoid duplicate charges.


    /* ========================================== CONSTRUCTOR AND SETTERS ========================================== */

    /**
     * @dev constructor.
     */
    constructor(string memory _name) ERC20PaymentProcessorV2() {
        // Set the admin
        AccessControlEnumerable._grantRole(DEFAULT_ADMIN_ROLE, _msgSender());

        // Set the name
        name = _name;
        
        // The contract starts its lifetime in the paused state.
        _pause();
    }


    /* =================================== ROLE HELPERS AND FUNCTIONS OVERRIDES =================================== */

    /**
     * @dev remove external access to {AccessControl.grantRole}.
     */
    function grantRole(bytes32, address) public pure override {
        revert("TokenMintCheckoutBase: A role can only be granted using the corresponding specialized function");
    }

    /**
     * @dev remove external access to {AccessControl.revokeRole}.
     */
    function revokeRole(bytes32, address) public pure override {
        revert("TokenMintCheckoutBase: A role can only be revoked using the corresponding specialized function");
    }

    /**
     * @dev list the addresses that have a particular role.
     */
    function listRoleMembers(bytes32 role) public view returns (address[] memory) {
        uint256 memberCount = getRoleMemberCount(role);
        address[] memory members = new address[](memberCount);
        for (uint ii = 0; ii < memberCount; ii++) {
            members[ii] = getRoleMember(role, ii);
        }
        return members;
    }


    /* ================================================ ADMIN ROLE ================================================ */


    /**
     * @dev Modifier that checks that the sender has the {DEFAULT_ADMIN_ROLE} role. 
     */
    modifier onlyAdmin() {
        require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "TokenMintCheckoutBase: Caller is missing role ADMIN.");
        _;
    }

    /**
     * @dev transfer the {DEFAULT_ADMIN_ROLE} role to another wallet.
     * 
     * note: because {grantRole} and {revokeRole} are not accessible externally, this function ensures that there
     * can only be a single admin for this contract at any time.
     */
    function transferAdmin(address _to) public onlyAdmin() {
        super.grantRole(DEFAULT_ADMIN_ROLE, _to);
        super.revokeRole(DEFAULT_ADMIN_ROLE, _msgSender());
    }

    /**
     * @dev returns the address of the admin of this registry.
     */
    function admin() public view returns (address) {
        return getRoleMember(DEFAULT_ADMIN_ROLE, 0);
    }

    /**
     * @dev same as {admin()}, to support Dapps that use {owner()} rather than {admin()} to check the ownership of 
     * a contract.
     */
    function owner() public view returns (address) {
        return admin();
    }


    /* ====================================== TRUSTED FORWARDER ROLE AND HELPERS ====================================== */

    /**
     * @dev the trusted forwarder role.
     * An "trused forwarder" has the ability to execute transactions on behalf of an account as if the account was executing
     * those transactions. This is helpful to allow a relayer to run transactions on behalf of an account.
     */
    function TRUSTED_FORWARDER_ROLE() internal pure returns(bytes32) {
        return keccak256("TRUSTED_FORWARDER_ROLE");
    } 

    /**
     * @dev grant the TRUSTED_FORWARDER_ROLE role.
     */
    function addTrustedForwarder(address account) public onlyAdmin() {
        super.grantRole(TRUSTED_FORWARDER_ROLE(), account);
    }

    /**
     * @dev revoke the TRUSTED_FORWARDER_ROLE role.
     */
    function removeTrustedForwarder(address account) public onlyAdmin() {
        super.revokeRole(TRUSTED_FORWARDER_ROLE(), account);
    }

    /**
     * @dev check if an address has the {TRUSTED_FORWARDER_ROLE} role.
     */
    function isTrustedForwarder(address account) public view returns (bool) {
        return hasRole(TRUSTED_FORWARDER_ROLE(), account);
    }

    /**
     * @dev list the addresses that have the {TRUSTED_FORWARDER_ROLE} role.
     */
    function listTrustedForwarders() public view returns (address[] memory) {
        return listRoleMembers(TRUSTED_FORWARDER_ROLE());
    }

    /**
     * @dev Override of {_msgSender()} that supports a trusted forwarder.
     * Heavily inspired from {openzeppelin/contracts/metatx/ERC2771Context.sol:ERC2771Context}.
     */
    function _msgSender() internal view virtual override returns (address sender) {
        if (isTrustedForwarder(msg.sender)) {
            // The assembly code is more direct than the Solidity version using `abi.decode`.
            assembly {
                sender := shr(96, calldataload(sub(calldatasize(), 20)))
            }
        } else {
            return super._msgSender();
        }
    }

    /**
     * @dev Override of {_msgData()} that supports a trusted forwarder.
     * Heavily inspired from {openzeppelin/contracts/metatx/ERC2771Context.sol:ERC2771Context}.
     */
    function _msgData() internal view virtual override returns (bytes calldata) {
        if (isTrustedForwarder(msg.sender)) {
            return msg.data[:msg.data.length - 20];
        } else {
            return super._msgData();
        }
    }


    /* ================================================ CHECKOUT ORACLE ROLE ================================================ */

    /**
     * @dev the trusted checkout oracle role. 
     */
    function TRUSTED_CHECKOUT_ORACLE_ROLE() internal pure returns(bytes32) {
        return keccak256("TRUSTED_CHECKOUT_ORACLE_ROLE");
    } 

    /**
     * @dev @dev Check that a specific address is a trusted checkout oracle.
     */
    modifier onlyTrustedCheckoutOracle(address account) {
        require(hasRole(TRUSTED_CHECKOUT_ORACLE_ROLE(), msg.sender), "TokenMintCheckoutBase: Caller is missing role TRUSTED_CHECKOUT_ORACLE_ROLE.");
        _ ;
    }

    /**
     * @dev grant the TRUSTED_CHECKOUT_ORACLE_ROLE role that allows an account to provide minting signatures for minting tokens.
     */
    function addTrustedCheckoutOracle(address account) public onlyAdmin {
        super.grantRole(TRUSTED_CHECKOUT_ORACLE_ROLE(), account);
    }

    /**
     * @dev revoke the TRUSTED_CHECKOUT_ORACLE_ROLE role.
     */
    function removeTrustedCheckoutOracle(address account) public onlyAdmin {
        super.revokeRole(TRUSTED_CHECKOUT_ORACLE_ROLE(), account);
    }

    /**
     * @dev check if an address has the {TRUSTED_CHECKOUT_ORACLE_ROLE} role.
     */
    function isTrustedCheckoutOracle(address account) public view returns (bool) {
        return hasRole(TRUSTED_CHECKOUT_ORACLE_ROLE(), account);
    }

    /**
     * @dev list the addresses that have the {TRUSTED_CHECKOUT_ORACLE_ROLE} role.
     */
    function listTrustedCheckoutOracles() public view returns (address[] memory) {
        return listRoleMembers(TRUSTED_CHECKOUT_ORACLE_ROLE());
    }


    /* ============================================= PAUSABLE HELPERS ============================================= */

    /**
     * @dev pause the contract
     * 
     * Requirements:
     * 
     *      - Only the admin of the contract can pause it. 
     */
    function pause() public onlyAdmin {
        _pause();
    }

    /**
     * @dev unpause the contract
     * 
     * Requirements:
     * 
     *      - Only the admin of the contract can unpause it. 
     */
    function unpause() public onlyAdmin {
        _unpause();
    }


    /* ========================================= CHECKOUT REQUEST HELPERS ========================================= */

    /**
     * @dev modifier to ensure that a checkout request signature is valid.
     * @param requestData the checkout request as bytes.
     * @param signature the signature block of {requestData}, signed by a trusted checkout oracle.
     */
    modifier onlyValidCheckoutSignature(
        bytes memory requestData,
        bytes memory signature
    ) {
        bytes32 expectedSignedMessage = ECDSA.toEthSignedMessageHash(requestData);
        address recoveredSigner = ECDSA.recover(expectedSignedMessage, signature);
        require(isTrustedCheckoutOracle(recoveredSigner), "TokenMintCheckoutBase: Invalid signature.");
        _;
    }

    /**
     * @dev helper to check the eligibility of a checkout request.
     * @param request the checkout request data as bytes.
     * 
     * Requirements:
     * 
     *      - {request.operatingContract} must be this contract.
     *      - {request.checkoutId} must not have been marked as processed.
     *      - {request.expirationTimestamp} must not have passed. 
     */
    function _checkEligibility(CheckoutRequest memory request) private view {
        require(request.operatingContract == address(this), "TokenMintCheckoutBase: Contract is not authorized to process this request.");
        require(!exists(request.checkoutId), "TokenMintCheckoutBase: Checkout with checkoutId was already processed.");
        require(request.expirationTimestamp >= block.timestamp, "TokenMintCheckoutBase: Checkout time window has expired.");
    }


    /* ============================================ CHECKOUT ID HELPERS ============================================ */

    /**
     * @dev helper to compute the hash of a {checkoutId}.
     * @param checkoutId the checkout id.
     * @return a keccak256 hash of the checkout id.
     */
    function _checkoutIdHash(string memory checkoutId) private pure returns (bytes32) {
        return keccak256(abi.encode(checkoutId));
    }

    /**
     * @dev helper to check if a checkoutId exists, i.e. if the checkout for that id was completed.
     * @param checkoutId the checkout id.
     * @return true if {checkoutId} has been processed, false otherwise.
     */
    function exists(string memory checkoutId) public view returns (bool) {
        return processed[_checkoutIdHash(checkoutId)];
    }


    /* ============================================== ERC20 CHECKOUT ============================================== */

    /**
     * @dev creates and encode a {CheckoutRequest}.
     * The {CheckoutRequest} is returned in an encoded form (bytes) and must be signed by the {checkoutOracle} to
     * authorize a checkout. That signature is then fed to {erc20Checkout} along with the encoded {CheckoutRequest} 
     * to be validated before proceeding with the checkout.
     * @param checkoutId the checkout id.
     * @param expirationTimestamp the expiration timestamp after which this checkout request is no longer valid.
     * @param paymentRecipient the recipient of the payment.
     * @param paymentToken the payment token.
     * @param paymentValue the payment value in the smallest unit of the associated currency
     * @param expirationTimestamp the expiration timestamp after which this checkout request is no longer valid.
     * @param tokenRecipient the recipient of the tokens to be minted.
     * @param tokenHashes the bytes32 ids (hex proofs) of the tokens to mint to the recipient.
     * @return the encoded checkout request as bytes, ready to be signed by the checkout oracle.
     *
     * Notes:
     * 
     *      - The returned encoded {CheckoutRequest} needs to be signed by a trusted checkout oracle to be valid.
     *      - If {data} is the result of this function, checkoutOracleAddress.signMessage(ethers.utils.arrayify(data))
     *        must be called in order to properly encode the hash before signing it.
     */
    function encodeCheckoutRequest(
        string calldata checkoutId,
        uint256 expirationTimestamp,
        address paymentRecipient,
        address paymentToken,
        uint256 paymentValue,
        address tokenRecipient,
        address tokenRegistry,
        bytes32[] memory tokenHashes
    ) public view returns (bytes memory) {
        return abi.encode(
            CheckoutRequest(
                address(this),
                checkoutId,
                expirationTimestamp,
                paymentRecipient,
                paymentToken,
                paymentValue,
                tokenRecipient,
                tokenRegistry,
                tokenHashes
            )
        );  
    }


    /**
     * @dev Mint tokens according to a checkout request and signature.
     * 
     * Requirements:
     *  - the contract is not paused
     *  - the checkout request and signature must be valid
     */
    function mintTokens(
        bytes calldata checkoutRequestData,
        bytes calldata checkoutSignature
    ) external nonReentrant whenNotPaused onlyValidCheckoutSignature(checkoutRequestData, checkoutSignature) {
        address caller = _msgSender();
        CheckoutRequest memory request = abi.decode(checkoutRequestData, (CheckoutRequest));
        _checkEligibility(request);
        _processPayment(caller, request.paymentRecipient, request.paymentToken, request.paymentValue);
        for (uint ii = 0 ; ii < request.tokenHashes.length ; ii++ ) {
            uint256 mintedTokenId = TokenRegistryInterface(request.tokenRegistry).mintToken(request.tokenRecipient, request.tokenHashes[ii]);
            uint256 unitPrice = request.paymentValue / request.tokenHashes.length; // this is safe because tokenHashes is empty, we would not be in this loop.
            emit TokenPurchasedAndMinted(request.tokenRecipient, request.tokenRegistry, mintedTokenId, request.paymentToken, unitPrice);
        }
        processed[_checkoutIdHash(request.checkoutId)] = true;
        emit CheckoutSuccess(caller, request.checkoutId);
    }


    /**
     * @dev Permit a transaction and mint tokens according to a checkout request and signature.
     * 
     * Requirements:
     *  - the contract is not paused
     *  - the checkout request and signature must be valid
     *  - A permit signature is required to approve the funds spending during the transaction
     *  - The originating caller of this function (returned by _msgSender()) has to be the signer of the permit signature.
     *  - The signature has to correspond to the price provided in the checkout request.
     *  - {permitExpiration} must correspond to the expiration time encoded in the permit signature
     */
    function permitFundsAndMintTokens(
        bytes calldata checkoutRequestData, // the checkout request data
        bytes calldata checkoutSignature,   // the checkout signature
        uint256 permitExpiration,           // the expiration of the permit signature
        uint8 v, bytes32 r, bytes32 s       // the parameters of the permit signature
    ) external nonReentrant whenNotPaused onlyValidCheckoutSignature(checkoutRequestData, checkoutSignature) {
        address caller = _msgSender();
        CheckoutRequest memory request = abi.decode(checkoutRequestData, (CheckoutRequest));
        _checkEligibility(request);
        _permitAndProcessPayment(
            caller,                     // the executor of the call
            request.paymentRecipient,   // the recipient of the payment
            request.paymentToken,       // the payment token
            request.paymentValue,       // the final purchase value
            request.paymentValue,       // the amount that is supposed to be approved for this transaction (and encoded in the permit signature)
            permitExpiration,           // the expiration of the permit signature
            v, r, s                     // the parameters of the permit signature
        );
        for (uint ii = 0 ; ii < request.tokenHashes.length ; ii++ ) {
            uint256 mintedTokenId = TokenRegistryInterface(request.tokenRegistry).mintToken(request.tokenRecipient, request.tokenHashes[ii]);
            uint256 unitPrice = request.paymentValue / request.tokenHashes.length; // this is safe because tokenHashes is empty, we would not be in this loop.
            emit TokenPurchasedAndMinted(request.tokenRecipient, request.tokenRegistry, mintedTokenId, request.paymentToken, unitPrice);
        }
        processed[_checkoutIdHash(request.checkoutId)] = true;
        emit CheckoutSuccess(caller, request.checkoutId);
    }


}

// SPDX-FileCopyrightText: © Courtyard Inc. (https://courtyard.io)
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/**
 * The IERC20Permit interface, used to permit funds to be transferred with a signature.
 */
interface IERC20Permit {
    function permit(address owner, address spender, uint256 value, uint256 expiration, uint8 v, bytes32 r, bytes32 s) external;
}

/**
 * @title processes payments in ERC20 and redirects them to a receiver address.
 * In comparison to the original version V2 supports defining the payment token and reviver address at the transaction time.
 */ 
abstract contract ERC20PaymentProcessorV2 {

    using SafeERC20 for IERC20;

    event PaymentProcessed(address indexed to, address indexed token, uint256 amount);

    constructor() {}

    /* ============================================ PAYMENT PROCESSING ============================================ */

    /**
     * @dev process the payment, assuming that {erc20Token} already knows that this contract is allowed to spend the funds on behalf of {from}.
     */
    function _processPayment(address fromAddress, address toAddress, address erc20Token, uint256 amount) internal {
        IERC20(erc20Token).safeTransferFrom(fromAddress, toAddress, amount);
        emit PaymentProcessed(toAddress, erc20Token, amount);
    }

    /**
     * @dev permit and process the payment of {erc20Token} by this contract on behalf of {fromAddress}.
     * Note that the
     *  - if requestAmount = permitAmount: the transaction would succeed
     *  - if requestAmount > permitAmount: the transaction would fail
     *  - if requestAmount < permitAmount: the transaction would succeed and the extra funds would be refunded to the payer. Note that this is 
     *    a deliberate choice to ensure that at the end of the transaction, there is no fund spending approval lingering around (since it is 
     *    not possible to self-cancel an approval on someone else behalf). The caveat is that if the authorizer permitted the spending of 
     *    funds they do not have in the first place, the transaction would fail, even if the requested amount is lower and the authorized does have that much funds.
     */
    function _permitAndProcessPayment(address fromAddress, address toAddress, address erc20Token, uint256 requestAmount, uint256 permitAmount, uint256 expiration, uint8 v, bytes32 r, bytes32 s) internal {
        // fail early if the requested amount is higher than the permitted amount.
        require(permitAmount >= requestAmount, "ERC20PaymentProcessor: request amount exceeds permit amount.");
        IERC20Permit(erc20Token).permit(fromAddress, address(this), permitAmount, expiration, v, r, s);
        // pull the funds.
        IERC20(erc20Token).safeTransferFrom(fromAddress, address(this), permitAmount);
        // pay the receiver.
        IERC20(erc20Token).safeTransfer(toAddress, requestAmount);
        // send the change back to the payer and cancel the approval in the process.
        IERC20(erc20Token).safeTransfer(fromAddress, permitAmount - requestAmount);
        emit PaymentProcessed(toAddress, erc20Token, requestAmount);
    }

}

{
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"string","name":"name","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":false,"internalType":"string","name":"checkoutId","type":"string"}],"name":"CheckoutSuccess","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"PaymentProcessed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"mintedToAddress","type":"address"},{"indexed":false,"internalType":"address","name":"mintedTokenAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"mintedTokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"paymentTokenAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"paymentAmount","type":"uint256"}],"name":"TokenPurchasedAndMinted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"addTrustedCheckoutOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"addTrustedForwarder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"checkoutId","type":"string"},{"internalType":"uint256","name":"expirationTimestamp","type":"uint256"},{"internalType":"address","name":"paymentRecipient","type":"address"},{"internalType":"address","name":"paymentToken","type":"address"},{"internalType":"uint256","name":"paymentValue","type":"uint256"},{"internalType":"address","name":"tokenRecipient","type":"address"},{"internalType":"address","name":"tokenRegistry","type":"address"},{"internalType":"bytes32[]","name":"tokenHashes","type":"bytes32[]"}],"name":"encodeCheckoutRequest","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"checkoutId","type":"string"}],"name":"exists","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"},{"internalType":"address","name":"","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isTrustedCheckoutOracle","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isTrustedForwarder","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"listRoleMembers","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"listTrustedCheckoutOracles","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"listTrustedForwarders","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"checkoutRequestData","type":"bytes"},{"internalType":"bytes","name":"checkoutSignature","type":"bytes"}],"name":"mintTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"checkoutRequestData","type":"bytes"},{"internalType":"bytes","name":"checkoutSignature","type":"bytes"},{"internalType":"uint256","name":"permitExpiration","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permitFundsAndMintTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"removeTrustedCheckoutOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"removeTrustedForwarder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"},{"internalType":"address","name":"","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"}],"name":"transferAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001243592056656e64696e67204d616368696e650000000000000000000000000000

-----Decoded View---------------
Arg [0] : name (string): CY Vending Machine

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [2] : 43592056656e64696e67204d616368696e650000000000000000000000000000