// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * 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}:
 *
 * ```solidity
 * 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. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }
    mapping(bytes32 => RoleData) private _roles;
    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }
    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }
    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }
    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }
    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }
    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }
    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }
    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");
        _revokeRole(role, account);
    }
    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }
    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }
    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }
    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}
// 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 (last updated v4.9.0) (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() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }
    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }
    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);
    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
    /**
     * @dev Returns the 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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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;
    }
    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }
    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }
    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }
    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }
    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}
// 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/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 (last updated v4.9.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }
    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }
    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }
    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }
    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }
            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }
            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");
            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////
            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)
                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }
            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.
            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)
                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)
                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }
            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;
            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;
            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256
            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }
    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }
    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);
        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }
    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }
    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }
    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }
    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }
    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }
    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }
    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.0;
/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }
    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }
    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }
    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
import "./math/Math.sol";
import "./math/SignedMath.sol";
/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;
    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }
    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }
    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }
    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.
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.
 *
 * ```solidity
 * 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.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
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) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;
        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }
        return result;
    }
    // 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;
        /// @solidity memory-safe-assembly
        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 in 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;
        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }
        return result;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.12;
interface AggregatorInterface {
  function latestAnswer() external view returns (int256 answer);
}
// SPDX-License-Identifier: MIT
// Latest stable version of solidity
pragma solidity 0.8.12;
interface ICollectionV3 {
    function initialize(
        string memory uri,
        uint256 _total,
        uint256 _whitelistedStartTime,
        uint256 _startTime,
        uint256 _endTime,
        uint256 _amount,
        uint256 _percent,
        address _admin,
        address _facAddress
    ) external;
    function __CollectionV3_init_unchained(
        string memory uri,
        uint256 _total,
        uint256 _whitelistedStartTime,
        uint256 _startTime,
        uint256 _endTime,
        uint256 _amount,
        uint256 _percent,
        address _admin,
        address _facAddress
    ) external;
    function addExternalAddresses(
        address _token,
        address _stone,
        address _treasure
    ) external;
    function recoverToken(address _token) external;
    function changeOnlyWhitelisted(bool _status) external;
    function buy(address buyer, uint256 _id) external;
    function mint(address to, uint256 _id) external;
    function mintBatch(
        address to,
        uint256[] memory ids,
        uint256[] memory amount_
    ) external;
    function addPayees(
        address[] memory payees_,
        uint256[] memory sharePerc_
    ) external;
    function _addPayee(address account, uint256 sharePerc_) external;
    function release() external;
    function getAmountPer(uint256 sharePerc) external view returns (uint256);
    function calcPerc(
        uint256 _amount,
        uint256 _percent
    ) external pure returns (uint256);
    function calcTrasAndShare() external view returns (uint256, uint256);
    function setStarTime(uint256 _starTime) external;
    function setEndTime(uint256 _endTime) external;
    function setWhiteListUser(address _addr) external;
    function setBatchWhiteListUser(address[] calldata _addr) external;
    function setAmount(uint256 _amount) external;
    function delShare(address account) external;
    function totalReleased() external view returns (uint256);
    function released(address account) external view returns (uint256);
    function shares(address account) external view returns (uint256);
    function allShares() external view returns (address[] memory);
    function available() external view returns (uint256);
    function balanceOf(
        address account,
        uint256 id
    ) external view returns (uint256);
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) external;
}
// SPDX-License-Identifier: MIT
// Latest stable version of solidity
pragma solidity 0.8.12;
interface IFarm {
    function payment(address buyer, uint256 amount) external returns (bool);
    function rewardedStones(address staker) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "./interfaces/ICollectionV3.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./interfaces/AggregatorInterface.sol";
import "./interfaces/IFarm.sol";
contract StonesDrop is ReentrancyGuard, AccessControl {
    /**  Events **/
    event MysteryBoxDropped(
        uint8 tier,
        address collection,
        uint256 id,
        address user,
        uint32 version
    );
    /** Structs **/
    struct Item {
        uint256 startTokenId;
        uint256 endTokenId;
        ICollectionV3 collection;
    }
    struct Tier {
        uint16 available;
        uint256 amount;
        uint16 rewards;
    }
    struct Purchase {
        uint256 amount;
        uint32 version;
    }
    /* Storage */
    mapping(address => Purchase) public bought;
    // General drop paramaters
    IFarm public stone;
    uint256 public maxPerWallet;
    uint256 public startTime;
    uint256 public endTime;
    Tier[] public tiers;
    // Tree data structure
    // About 40% gas cost reduction by using uint16. Limited to max 64K nfts.
    Item[] public items;
    uint16[] public tree;
    uint16 start_leaf;
    uint16 tree_length;
    uint32 current_version;
    address[] nftHolderAddresses;
    constructor() {
        _grantRole(DEFAULT_ADMIN_ROLE, _msgSender());
        current_version = 0;
    }
    modifier isStarted() {
        require(
            startTime <= block.timestamp && endTime > block.timestamp,
            "Drop has not started yet!"
        );
        _;
    }
    /** Public functions **/
    /*
     * Get the number of available boxes for a tier
     */
    function getAvailable(uint8 _tier) public view returns (uint256) {
        if (_tier >= tiers.length) {
            return 0;
        }
        return tiers[_tier].available;
    }
    /*
     *This function picks random card and mints this random card to user
     */
    function buyMysteryBox(
        uint8 _tier,
        uint8 quantity
    ) external isStarted nonReentrant {
        address _user = _msgSender();
        require(_tier < tiers.length, "Invalid tier id");
        require(tiers[_tier].available >= quantity, "Sold out");
        if (bought[_user].version != current_version) {
            bought[_user].amount = 0;
            bought[_user].version = current_version;
        }
        require(
            bought[_user].amount + quantity <= maxPerWallet,
            "Limit per wallet reached"
        );
        bought[_user].amount += quantity;
        uint256 _amount = tiers[_tier].amount * quantity;
        uint256 _stones = stone.rewardedStones(_user);
        require(_stones >= _amount, "You do not have enough stones!");
        require(stone.payment(_user, _amount), "Payment was unsuccessful");
        tiers[_tier].available -= quantity;
        for (uint8 j = 0; j < quantity; j++) {
            for (uint256 i = 0; i < tiers[_tier].rewards; i++) {
                (ICollectionV3 collection, uint256 tokenId) = _pickNft(
                    j * quantity + i
                );
                mint(collection, _user, tokenId);
                emit MysteryBoxDropped(
                    _tier,
                    address(collection),
                    tokenId,
                    _user,
                    current_version
                );
            }
        }
    }
    /*
     *This function picks random card and mints this random card to user
     */
    function giveAway(
        uint8 _tier,
        address _user
    ) external onlyRole(DEFAULT_ADMIN_ROLE) {
        require(tree[0] - tiers[_tier].available > 0, "Sold out");
        (ICollectionV3 collection, uint256 tokenId) = _pickNft(1);
        mint(collection, _user, tokenId);
        emit MysteryBoxDropped(
            _tier,
            address(collection),
            tokenId,
            _user,
            current_version
        );
    }
    function mint(
        ICollectionV3 collection,
        address user,
        uint256 tokenId
    ) internal {
        for (uint8 i = 0; i < nftHolderAddresses.length; i++) {
            if (collection.balanceOf(nftHolderAddresses[i], tokenId) > 0) {
                collection.safeTransferFrom(
                    nftHolderAddresses[i],
                    user,
                    tokenId,
                    1,
                    ""
                );
                return;
            }
        }
        collection.mint(user, tokenId);
    }
    function setNftHolderAddresses(
        address[] memory _nftHolderAddresses
    ) public onlyRole(DEFAULT_ADMIN_ROLE) {
        delete nftHolderAddresses;
        for (uint8 i = 0; i < _nftHolderAddresses.length; i++) {
            nftHolderAddresses.push(_nftHolderAddresses[i]);
        }
    }
    /** Code for managing drop paramaters **/
    function setGeneralDropParamaters(
        address _stone,
        uint256 _maxPerWallet,
        uint256 _startTime,
        uint256 _endTime
    ) public onlyRole(DEFAULT_ADMIN_ROLE) {
        stone = IFarm(_stone);
        maxPerWallet = _maxPerWallet;
        startTime = _startTime;
        endTime = _endTime;
    }
    function setTiersParamaters(
        Tier[] calldata _tiers
    ) public onlyRole(DEFAULT_ADMIN_ROLE) {
        delete tiers;
        for (uint256 i = 0; i < _tiers.length; i++) {
            tiers.push(_tiers[i]);
        }
    }
    /** Code related to the tree structure used to store items in the pack **/
    function resetItems() public onlyRole(DEFAULT_ADMIN_ROLE) {
        delete items;
        start_leaf = 0;
        tree_length = 0;
        delete tree;
        current_version += 1;
    }
    function addItems(
        Item[] calldata _items
    ) public onlyRole(DEFAULT_ADMIN_ROLE) {
        for (uint256 i = 0; i < _items.length; i++) {
            items.push(_items[i]);
        }
    }
    function preCompute() public onlyRole(DEFAULT_ADMIN_ROLE) {
        uint64 log;
        while (2 ** log < items.length) {
            log++;
        }
        start_leaf = uint16((2 ** log) - 1);
        tree_length = uint16(2 ** (log + 1) - 1);
        tree = new uint16[](tree_length);
        uint64 j = 0;
        for (
            uint64 i = uint64(start_leaf);
            (i < tree_length) && (j < items.length);
            i++
        ) {
            tree[i] = uint16(
                items[i - start_leaf].endTokenId -
                    items[i - start_leaf].startTokenId +
                    1
            );
            j++;
        }
        if (tree_length > 1) {
            for (uint256 i = (2 ** log) - 2; i >= 1; i--) {
                tree[i] = tree[2 * i + 1] + tree[2 * i + 2];
            }
            tree[0] = tree[1] + tree[2];
        }
    }
    function _pickNft(uint256 seed) internal returns (ICollectionV3, uint256) {
        uint16 position = uint16(_getRandom(tree[0], seed));
        uint16 item = _findPosition(position);
        _removeOne(item);
        require(
            items[item].startTokenId <= items[item].endTokenId,
            "Nft reward soldout"
        );
        uint256 tokenId = items[item].startTokenId;
        ICollectionV3 collection = items[item].collection;
        items[item].startTokenId += 1;
        return (collection, tokenId);
    }
    function _getRandom(
        uint256 gamerange,
        uint256 seed
    ) internal view returns (uint256) {
        return
            1 +
            (uint256(
                keccak256(
                    abi.encodePacked(
                        block.timestamp,
                        block.difficulty,
                        keccak256(abi.encodePacked(block.coinbase)),
                        seed
                    )
                )
            ) % gamerange);
    }
    function _findPosition(uint16 value) internal view returns (uint16) {
        uint16 i = 0;
        require(tree[0] >= value, "Value is bigger than remaining elements");
        while (2 * i + 2 < tree_length) {
            uint16 left = 2 * i + 1;
            uint16 right = 2 * i + 2;
            if (value <= tree[left]) {
                i = left;
            } else {
                i = right;
                value = value - tree[left];
            }
        }
        return i - start_leaf;
    }
    function _removeOne(uint16 position) internal {
        uint16 i = position + start_leaf;
        require(tree[i] > 0, "Element is already containing 0 values");
        tree[i]--;
        while (i > 0) {
            if (i % 2 == 1) {
                i++;
            }
            uint16 parent = (i / 2) - 1;
            tree[parent] = tree[i - 1] + tree[i];
            i = parent;
        }
    }
}

// SPDX-License-Identifier: MIT
// Latest stable version of solidity
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "../FarmV2.sol";
import "../MoneyHandler.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./IFactory.sol";
import "../oracle/IPriceFeed.sol";
import "hardhat/console.sol";
contract CollectionV2 is ERC1155, AccessControl {
    event Sold(
        address indexed operator,
        address indexed to,
        uint256 indexed id,
        uint256 amount
    );
    event PaymentShared(address account, uint256 amount);
    event PaymentTreasure(address account, uint256 amount);
    event SoldWithStones(address buyer, uint256 amount);
    event NewStartTime(uint256 startTime);
    event NewEndTime(uint256 endTime);
    event NewUsdAmount(uint256 amount);
    event SetAddresses(
        address token,
        address stone,
        address treasury,
        address moneyHandler
    );
    using EnumerableSet for EnumerableSet.UintSet;
    EnumerableSet.UintSet soldCards;
    bytes32 public constant MINTER_ROLE = bytes32(keccak256("MINTER_ROLE"));
    IERC20 public token;
    FarmV2 public stone;
    MoneyHandler public moneyHand;
    /**@notice amount is a USD value only for Matic */
    uint256 public amount;
    uint256 public percent;
    uint256 public available;
    uint256 public sold;
    uint256 public total;
    uint256 public startTime;
    uint256 public endTime;
    uint8 public cType;
    address public facAddress;
    address public ernTreasure;
    constructor(CollectionData memory collecData) ERC1155(collecData.uri) {
        amount = collecData.amount;
        available = collecData.total;
        total = collecData.total;
        startTime = collecData.startTime;
        endTime = collecData.endTime;
        percent = collecData.percent;
        facAddress = collecData.factoryAddress;
        _setupRole(DEFAULT_ADMIN_ROLE, collecData.admin);
        _setupRole(DEFAULT_ADMIN_ROLE, facAddress);
        addExternalAddresses(
            collecData.token,
            collecData.stone,
            collecData.treasury,
            collecData.moneyHandler
        );
    }
    modifier onlyFactory() {
        require(
            msg.sender == facAddress,
            "This function can only be called by factory contract"
        );
        _;
    }
    function addExternalAddresses(
        address _token,
        address _stone, // 0x0000000000000000000
        address _treasury,
        address _moneyHandler
    ) public onlyRole(DEFAULT_ADMIN_ROLE) {
        token = IERC20(_token);
        stone = FarmV2(_stone);
        moneyHand = MoneyHandler(_moneyHandler);
        ernTreasure = _treasury;
        emit SetAddresses(_token, _stone, _treasury, _moneyHandler);
    }
    function recoverToken(address _token)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        uint256 amount = IERC20(_token).balanceOf(address(this));
        IERC20(_token).transfer(msg.sender, amount);
    }
    function buy(address buyer, uint256 _id) external onlyFactory {
        require(!(soldCards.contains(_id)), "This card already sold");
        require(available > 0, "Sold Out");
        require(
            startTime <= block.timestamp && endTime > block.timestamp,
            "Sale did not start yet"
        );
        address(stone) == address(0) ? _withToken(buyer) : _withStones(buyer);
        _mint(buyer, _id, 1, "");
        available -= 1;
        sold += 1;
        soldCards.add(_id);
        emit Sold(address(this), buyer, _id, amount);
    }
    function mint(address to, uint256 _id)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        require(!(soldCards.contains(_id)), "This card already sold");
        require(available > 0, "Sold Out");
        _mint(to, _id, 1, "");
        available -= 1;
        sold += 1;
        soldCards.add(_id);
    }
    function mintBatch(
        address to,
        uint256[] memory ids,
        uint256[] memory amount_
    ) external onlyRole(DEFAULT_ADMIN_ROLE) {
        require(available > ids.length, "Sold Out");
        for (uint256 i = 0; i < ids.length; i++) {
            require(!(soldCards.contains(ids[i])), "This card already sold");
        }
        _mintBatch(to, ids, amount_, "");
        available -= ids.length;
        sold += ids.length;
        for (uint256 i = 0; i < ids.length; i++) {
            soldCards.add(ids[i]);
        }
    }
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC1155, AccessControl)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }
    function _withStones(address buyer) private {
        uint256 stones = stone.rewardedStones(buyer);
        require(stones >= amount, "You do not have enough points !");
        require(stone.payment(buyer, amount), "Payment was unsuccessful");
        emit SoldWithStones(buyer, amount);
    }
    function calcPerc(uint256 _amount, uint256 _percent)
        private
        pure
        returns (uint256)
    {
        uint256 sellmul = SafeMath.mul(_amount, _percent);
        uint256 sellAmount = SafeMath.div(sellmul, 10**18);
        return sellAmount;
    }
    function setStarTime(uint256 _starTime)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        startTime = _starTime;
        emit NewStartTime(startTime);
    }
    function setEndTime(uint256 _endTime)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        endTime = _endTime;
        emit NewEndTime(endTime);
    }
    function setAmount(uint256 _newAmount)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        amount = _newAmount;
        emit NewUsdAmount(amount);
    }
    function _withToken(address buyer) private {
        uint256 price = getCardPrice();
        require(
            token.balanceOf(buyer) >= price,
            "Insufficient funds: Cannot buy this NFT"
        );
        uint256 treasAmount = calcPerc(price, percent);
        uint256 shareAmount = SafeMath.sub(price, treasAmount);
        token.transferFrom(buyer, address(this), price);
        token.transfer(ernTreasure, treasAmount);
        token.transfer(address(moneyHand), shareAmount);
        moneyHand.updateCollecMny(address(this), shareAmount);
        emit PaymentTreasure(address(this), treasAmount);
        emit PaymentShared(address(this), shareAmount);
    }
    function getTokenPrice() public view returns (uint256) {
        address priceOracle = IFactory(facAddress).getPriceOracle();
        address tokenFeed = IPriceFeed(priceOracle).getFeed(address(token));
        int256 priceUSD = IPriceFeed(priceOracle).getThePrice(tokenFeed);
        uint256 uPriceUSD = uint256(priceUSD);
        return uPriceUSD;
    }
    function getCardPrice() public view returns (uint256) {
        uint256 tokenPrice = getTokenPrice();
        console.log(tokenPrice);
        uint256 result = (amount * (1e44)) / (tokenPrice * (1e18));
        return result;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
contract FarmV2 is AccessControl {
    using SafeERC20 for ERC20;
    using SafeMath for uint256;
    uint256 public limit = 10000 ether;
    uint256 public total;
    bytes32 public constant COLLECTION_ROLE =
        bytes32(keccak256("COLLECTION_ROLE"));
    struct Staker {
        uint256 amount;
        uint256 stones;
        uint256 timestamp;
    }
    mapping(address => Staker) public stakers;
    ERC20 private _token;
    constructor() public {
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }
    function setTokenAddress(ERC20 token_)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        _token = token_;
    }
    function giveAway(address _address, uint256 stones)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        stakers[_address].stones = stones;
    }
    function farmed(address sender) public view returns (uint256) {
        // Returns how many ERN this account has farmed
        return (stakers[sender].amount);
    }
    function farmedStart(address sender) public view returns (uint256) {
        // Returns when this account started farming
        return (stakers[sender].timestamp);
    }
    function payment(address buyer, uint256 amount)
        public
        onlyRole(COLLECTION_ROLE)
        returns (bool)
    {
        consolidate(buyer);
        require(rewardedStones(buyer) >= amount, "Insufficient stones!");
        stakers[buyer].stones = stakers[buyer].stones.sub(amount);
        stakers[buyer].timestamp = block.timestamp;
        return true;
    }
    function rewardedStones(address staker) public view returns (uint256) {
        if (stakers[staker].amount < 1000) {
            return stakers[staker].stones;
        }
        // solium-disable-next-line security/no-block-members
        uint256 _seconds = block.timestamp.sub(stakers[staker].timestamp).div(
            1 seconds
        );
        return
            stakers[staker].stones.add(
                stakers[staker].amount.div(1e18).mul(_seconds).mul(
                    11574074074074000
                )
            );
    }
    function consolidate(address staker) internal {
        uint256 stones = rewardedStones(staker);
        stakers[staker].stones = stones;
    }
    function deposit(uint256 amount) public {
        address account = msg.sender;
        require(_token.balanceOf(account) > 0, "your balance is insufficient");
        require(
            stakers[account].amount.add(amount) <= limit,
            "Limit 10000 ERN"
        );
        _token.safeTransferFrom(account, address(this), amount);
        consolidate(account);
        total = total.add(amount);
        stakers[account].amount = stakers[account].amount.add(amount);
        // solium-disable-next-line security/no-block-members
        stakers[account].timestamp = block.timestamp;
    }
    function withdraw(uint256 amount) public {
        address account = msg.sender;
        //require(account == msg.sender,"you are not authorized on this account!");
        require(stakers[account].amount >= amount, "Insufficient amount!");
        require(_token.transfer(account, amount), "Transfer error!");
        consolidate(account);
        stakers[account].amount = stakers[account].amount.sub(amount);
        total = total.sub(amount);
        // solium-disable-next-line security/no-block-members
        stakers[account].timestamp = block.timestamp;
    }
    function sell(
        uint256 stones,
        address from,
        address to
    ) public {
        require(
            hasRole(COLLECTION_ROLE, msg.sender),
            "you are not authorized on this account!"
        );
        consolidate(from);
        require(rewardedStones(from) >= stones, "Insufficient stones!");
        stakers[from].stones = stakers[from].stones.sub(stones);
        stakers[from].timestamp = block.timestamp;
        stakers[to].stones = stakers[to].stones.add(stones);
        stakers[to].timestamp = block.timestamp;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <=0.8.0;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
/**
 * @title PaymentSplitter
 * @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
 * that the Ether will be split in this way, since it is handled transparently by the contract.
 *
 * The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
 * account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
 * an amount proportional to the percentage of total shares they were assigned.
 *
 * `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
 * accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
 * function.
 */
contract MoneyHandler is Context, AccessControl {
    using SafeMath for uint256;
    event PayeeAdded(address account, uint256 shares);
    event PaymentReleased(address to, uint256 amount);
    event PaymentReceived(address from, uint256 amount);
    IERC20 private token;
    // uint256 public _totalShares;
    uint256 public _totalReleased;
    // uint256 public amu = 1;
    mapping(address => uint256) private _shares;
    mapping(address => uint256) private _released;
    mapping(address => uint256) public collectionMoney;
    address[] private _payees;
    uint256 private _totalCllcAmnt;
    bytes32 public constant COLLECTION_ROLE =
        bytes32(keccak256("COLLECTION_ROLE"));
    constructor() public {
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }
    /**
     * @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
     * reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
     * reliability of the events, and not the actual splitting of Ether.
     *
     * To learn more about this see the Solidity documentation for
     * https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
     * functions].
     */
    /**
     * @dev Getter for the total shares held by payees.
     */
    // function totalShares() public view returns (uint256) {
    //     return _totalShares;
    // }
    /**
     * @dev Getter for the total amount of Ether already released.
     */
    function totalReleased() public view returns (uint256) {
        return _totalReleased;
    }
    /**
     * @dev Getter for the amount of shares held by an account.
     */
    function shares(address account) public view returns (uint256) {
        return _shares[account];
    }
    /**
     * @dev Getter for the amount of Ether already released to a payee.
     */
    function released(address account) public view returns (uint256) {
        return _released[account];
    }
    function collecMny(address collection) public view returns (uint256) {
        return collectionMoney[collection];
    }
    /**
     * @dev Getter for the address of the payee number `index`.
     */
    function payee(uint256 index) public view returns (address) {
        return _payees[index];
    }
    function updateCollecMny(address collection, uint256 amount)
        public
        onlyRole(COLLECTION_ROLE)
    {
        collectionMoney[collection] = collectionMoney[collection].add(amount);
    }
    /**
     * @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
     * total shares and their previous withdrawals.
     */
    function release(
        address account,
        address collection,
        address _token
    ) private {
        require(_shares[account] > 0, "PaymentSplitter: account has no shares");
        _released[account] = _released[account].add(_shares[account]);
        _totalReleased = _totalReleased.add(_shares[account]);
        IERC20 token = IERC20(_token);
        token.transfer(account, _shares[account]);
        collectionMoney[collection] = collectionMoney[collection].sub(
            _shares[account]
        );
        emit PaymentReleased(account, _shares[account]);
    }
    /**
     * @dev Add a new payee to the contract.
     * @param account The address of the payee to add.
     * // shares_ The number of shares owned by the payee.
     */
    function _addPayee(
        address account,
        uint256 sharePerc_,
        address collection,
        address _token
    ) private {
        require(
            account != address(0),
            "PaymentSplitter: account is the zero address"
        );
        uint256 shares_ = getAmountPer(_totalCllcAmnt, sharePerc_);
        _shares[account] = shares_;
        _payees.push(account);
        release(account, collection, _token);
        // emit PayeeAdded(account, shares_);
    }
    //Get amount per person
    function getAmountPer(uint256 totalAmount, uint256 sharePerc)
        private
        pure
        returns (uint256)
    {
        uint256 sharesmul_ = SafeMath.mul(totalAmount, sharePerc);
        uint256 shares_ = SafeMath.div(sharesmul_, 10**18);
        return shares_;
    }
    function recoverToken(address _token)
        external
        onlyRole(DEFAULT_ADMIN_ROLE)
    {
        uint256 amount = IERC20(_token).balanceOf(address(this));
        IERC20(_token).transfer(msg.sender, amount);
    }
    function redeem(
        address collection,
        address _token,
        address[] memory payees,
        uint256[] memory sharePerc_
    ) public onlyRole(DEFAULT_ADMIN_ROLE) {
        require(payees.length > 0, "redeem: no payees");
        require(payees.length == sharePerc_.length, "redeem: no payees");
        _totalCllcAmnt = collectionMoney[collection];
        require(_totalCllcAmnt > 0, "redeem: insufficient funds");
        uint256 totalShareAmount;
        for (uint256 i = 0; i < sharePerc_.length; i++) {
            totalShareAmount = totalShareAmount.add(
                getAmountPer(_totalCllcAmnt, sharePerc_[i])
            );
        }
        require(
            _totalCllcAmnt >= totalShareAmount,
            "redeem: the total amount in the contract must be equal to or greater than the amount to be withdraw"
        );
        for (uint256 i = 0; i < payees.length; i++) {
            _addPayee(payees[i], sharePerc_[i], collection, _token);
        }
    }
}
// SPDX-License-Identifier: MIT
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
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;
            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
            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) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }
    // 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);
    }
    // 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))));
    }
    // 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));
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC1155.sol";
import "./IERC1155Receiver.sol";
import "./extensions/IERC1155MetadataURI.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/introspection/ERC165.sol";
/**
 * @dev Implementation of the basic standard multi-token.
 * See https://eips.ethereum.org/EIPS/eip-1155
 * Originally based on code by Enjin: https://github.com/enjin/erc-1155
 *
 * _Available since v3.1._
 */
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
    using Address for address;
    // Mapping from token ID to account balances
    mapping (uint256 => mapping(address => uint256)) private _balances;
    // Mapping from account to operator approvals
    mapping (address => mapping(address => bool)) private _operatorApprovals;
    // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
    string private _uri;
    /**
     * @dev See {_setURI}.
     */
    constructor (string memory uri_) {
        _setURI(uri_);
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IERC1155).interfaceId
            || interfaceId == type(IERC1155MetadataURI).interfaceId
            || super.supportsInterface(interfaceId);
    }
    /**
     * @dev See {IERC1155MetadataURI-uri}.
     *
     * This implementation returns the same URI for *all* token types. It relies
     * on the token type ID substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * Clients calling this function must replace the `\\{id\\}` substring with the
     * actual token type ID.
     */
    function uri(uint256) public view virtual override returns (string memory) {
        return _uri;
    }
    /**
     * @dev See {IERC1155-balanceOf}.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
        require(account != address(0), "ERC1155: balance query for the zero address");
        return _balances[id][account];
    }
    /**
     * @dev See {IERC1155-balanceOfBatch}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(
        address[] memory accounts,
        uint256[] memory ids
    )
        public
        view
        virtual
        override
        returns (uint256[] memory)
    {
        require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
        uint256[] memory batchBalances = new uint256[](accounts.length);
        for (uint256 i = 0; i < accounts.length; ++i) {
            batchBalances[i] = balanceOf(accounts[i], ids[i]);
        }
        return batchBalances;
    }
    /**
     * @dev See {IERC1155-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        require(_msgSender() != operator, "ERC1155: setting approval status for self");
        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }
    /**
     * @dev See {IERC1155-isApprovedForAll}.
     */
    function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[account][operator];
    }
    /**
     * @dev See {IERC1155-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    )
        public
        virtual
        override
    {
        require(to != address(0), "ERC1155: transfer to the zero address");
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: caller is not owner nor approved"
        );
        address operator = _msgSender();
        _beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
        uint256 fromBalance = _balances[id][from];
        require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
        _balances[id][from] = fromBalance - amount;
        _balances[id][to] += amount;
        emit TransferSingle(operator, from, to, id, amount);
        _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
    }
    /**
     * @dev See {IERC1155-safeBatchTransferFrom}.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    )
        public
        virtual
        override
    {
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
        require(to != address(0), "ERC1155: transfer to the zero address");
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: transfer caller is not owner nor approved"
        );
        address operator = _msgSender();
        _beforeTokenTransfer(operator, from, to, ids, amounts, data);
        for (uint256 i = 0; i < ids.length; ++i) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];
            uint256 fromBalance = _balances[id][from];
            require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
            _balances[id][from] = fromBalance - amount;
            _balances[id][to] += amount;
        }
        emit TransferBatch(operator, from, to, ids, amounts);
        _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
    }
    /**
     * @dev Sets a new URI for all token types, by relying on the token type ID
     * substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * By this mechanism, any occurrence of the `\\{id\\}` substring in either the
     * URI or any of the amounts in the JSON file at said URI will be replaced by
     * clients with the token type ID.
     *
     * For example, the `https://token-cdn-domain/\\{id\\}.json` URI would be
     * interpreted by clients as
     * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
     * for token type ID 0x4cce0.
     *
     * See {uri}.
     *
     * Because these URIs cannot be meaningfully represented by the {URI} event,
     * this function emits no events.
     */
    function _setURI(string memory newuri) internal virtual {
        _uri = newuri;
    }
    /**
     * @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - If `account` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function _mint(address account, uint256 id, uint256 amount, bytes memory data) internal virtual {
        require(account != address(0), "ERC1155: mint to the zero address");
        address operator = _msgSender();
        _beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
        _balances[id][account] += amount;
        emit TransferSingle(operator, address(0), account, id, amount);
        _doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
    }
    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function _mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) internal virtual {
        require(to != address(0), "ERC1155: mint to the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
        address operator = _msgSender();
        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
        for (uint i = 0; i < ids.length; i++) {
            _balances[ids[i]][to] += amounts[i];
        }
        emit TransferBatch(operator, address(0), to, ids, amounts);
        _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
    }
    /**
     * @dev Destroys `amount` tokens of token type `id` from `account`
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens of token type `id`.
     */
    function _burn(address account, uint256 id, uint256 amount) internal virtual {
        require(account != address(0), "ERC1155: burn from the zero address");
        address operator = _msgSender();
        _beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
        uint256 accountBalance = _balances[id][account];
        require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
        _balances[id][account] = accountBalance - amount;
        emit TransferSingle(operator, account, address(0), id, amount);
    }
    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     */
    function _burnBatch(address account, uint256[] memory ids, uint256[] memory amounts) internal virtual {
        require(account != address(0), "ERC1155: burn from the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
        address operator = _msgSender();
        _beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
        for (uint i = 0; i < ids.length; i++) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];
            uint256 accountBalance = _balances[id][account];
            require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
            _balances[id][account] = accountBalance - amount;
        }
        emit TransferBatch(operator, account, address(0), ids, amounts);
    }
    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning, as well as batched variants.
     *
     * The same hook is called on both single and batched variants. For single
     * transfers, the length of the `id` and `amount` arrays will be 1.
     *
     * Calling conditions (for each `id` and `amount` pair):
     *
     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * of token type `id` will be  transferred to `to`.
     * - When `from` is zero, `amount` tokens of token type `id` will be minted
     * for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
     * will be burned.
     * - `from` and `to` are never both zero.
     * - `ids` and `amounts` have the same, non-zero length.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    )
        internal
        virtual
    { }
    function _doSafeTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    )
        private
    {
        if (to.isContract()) {
            try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
                if (response != IERC1155Receiver(to).onERC1155Received.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non ERC1155Receiver implementer");
            }
        }
    }
    function _doSafeBatchTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    )
        private
    {
        if (to.isContract()) {
            try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (bytes4 response) {
                if (response != IERC1155Receiver(to).onERC1155BatchReceived.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non ERC1155Receiver implementer");
            }
        }
    }
    function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
        uint256[] memory array = new uint256[](1);
        array[0] = element;
        return array;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    function hasRole(bytes32 role, address account) external view returns (bool);
    function getRoleAdmin(bytes32 role) external view returns (bytes32);
    function grantRole(bytes32 role, address account) external;
    function revokeRole(bytes32 role, address account) external;
    function renounceRole(bytes32 role, address account) external;
}
/**
 * @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 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 {_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 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]{20}) is missing role (0x[0-9a-f]{32})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role, _msgSender());
        _;
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId
            || super.supportsInterface(interfaceId);
    }
    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view override returns (bool) {
        return _roles[role].members[account];
    }
    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
     */
    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 granted `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}.
     * ====
     */
    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 {
        emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
        _roles[role].adminRole = adminRole;
    }
    function _grantRole(bytes32 role, address account) private {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }
    function _revokeRole(bytes32 role, address account) private {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
struct CollectionData {
    string uri;
    uint256 total;
    uint256 startTime;
    uint256 endTime;
    uint256 amount;
    uint256 percent;
    address admin;
    address factoryAddress;
    uint8 currencyType;
    address farm;
    address moneyHandler;
    address treasury;
    address token;
    address stone;
}
interface IFactory {
    function getPriceOracle() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
interface IPriceFeed {
    function getThePrice(address tokenFeed) external view returns (int256);
    function setPriceFeed(address token, address feed) external;
    function getFeed(address token) external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity >= 0.4.22 <0.9.0;
library console {
\taddress constant CONSOLE_ADDRESS = address(0x000000000000000000636F6e736F6c652e6c6f67);
\tfunction _sendLogPayload(bytes memory payload) private view {
\t\tuint256 payloadLength = payload.length;
\t\taddress consoleAddress = CONSOLE_ADDRESS;
\t\tassembly {
\t\t\tlet payloadStart := add(payload, 32)
\t\t\tlet r := staticcall(gas(), consoleAddress, payloadStart, payloadLength, 0, 0)
\t\t}
\t}
\tfunction log() internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log()"));
\t}
\tfunction logInt(int p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(int)", p0));
\t}
\tfunction logUint(uint p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
\t}
\tfunction logString(string memory p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
\t}
\tfunction logBool(bool p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
\t}
\tfunction logAddress(address p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
\t}
\tfunction logBytes(bytes memory p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes)", p0));
\t}
\tfunction logBytes1(bytes1 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes1)", p0));
\t}
\tfunction logBytes2(bytes2 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes2)", p0));
\t}
\tfunction logBytes3(bytes3 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes3)", p0));
\t}
\tfunction logBytes4(bytes4 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes4)", p0));
\t}
\tfunction logBytes5(bytes5 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes5)", p0));
\t}
\tfunction logBytes6(bytes6 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes6)", p0));
\t}
\tfunction logBytes7(bytes7 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes7)", p0));
\t}
\tfunction logBytes8(bytes8 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes8)", p0));
\t}
\tfunction logBytes9(bytes9 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes9)", p0));
\t}
\tfunction logBytes10(bytes10 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes10)", p0));
\t}
\tfunction logBytes11(bytes11 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes11)", p0));
\t}
\tfunction logBytes12(bytes12 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes12)", p0));
\t}
\tfunction logBytes13(bytes13 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes13)", p0));
\t}
\tfunction logBytes14(bytes14 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes14)", p0));
\t}
\tfunction logBytes15(bytes15 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes15)", p0));
\t}
\tfunction logBytes16(bytes16 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes16)", p0));
\t}
\tfunction logBytes17(bytes17 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes17)", p0));
\t}
\tfunction logBytes18(bytes18 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes18)", p0));
\t}
\tfunction logBytes19(bytes19 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes19)", p0));
\t}
\tfunction logBytes20(bytes20 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes20)", p0));
\t}
\tfunction logBytes21(bytes21 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes21)", p0));
\t}
\tfunction logBytes22(bytes22 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes22)", p0));
\t}
\tfunction logBytes23(bytes23 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes23)", p0));
\t}
\tfunction logBytes24(bytes24 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes24)", p0));
\t}
\tfunction logBytes25(bytes25 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes25)", p0));
\t}
\tfunction logBytes26(bytes26 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes26)", p0));
\t}
\tfunction logBytes27(bytes27 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes27)", p0));
\t}
\tfunction logBytes28(bytes28 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes28)", p0));
\t}
\tfunction logBytes29(bytes29 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes29)", p0));
\t}
\tfunction logBytes30(bytes30 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes30)", p0));
\t}
\tfunction logBytes31(bytes31 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes31)", p0));
\t}
\tfunction logBytes32(bytes32 p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bytes32)", p0));
\t}
\tfunction log(uint p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
\t}
\tfunction log(string memory p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
\t}
\tfunction log(bool p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
\t}
\tfunction log(address p0) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
\t}
\tfunction log(uint p0, uint p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint)", p0, p1));
\t}
\tfunction log(uint p0, string memory p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string)", p0, p1));
\t}
\tfunction log(uint p0, bool p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool)", p0, p1));
\t}
\tfunction log(uint p0, address p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address)", p0, p1));
\t}
\tfunction log(string memory p0, uint p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint)", p0, p1));
\t}
\tfunction log(string memory p0, string memory p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string)", p0, p1));
\t}
\tfunction log(string memory p0, bool p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool)", p0, p1));
\t}
\tfunction log(string memory p0, address p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address)", p0, p1));
\t}
\tfunction log(bool p0, uint p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint)", p0, p1));
\t}
\tfunction log(bool p0, string memory p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string)", p0, p1));
\t}
\tfunction log(bool p0, bool p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool)", p0, p1));
\t}
\tfunction log(bool p0, address p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address)", p0, p1));
\t}
\tfunction log(address p0, uint p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint)", p0, p1));
\t}
\tfunction log(address p0, string memory p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string)", p0, p1));
\t}
\tfunction log(address p0, bool p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool)", p0, p1));
\t}
\tfunction log(address p0, address p1) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address)", p0, p1));
\t}
\tfunction log(uint p0, uint p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint)", p0, p1, p2));
\t}
\tfunction log(uint p0, uint p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string)", p0, p1, p2));
\t}
\tfunction log(uint p0, uint p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool)", p0, p1, p2));
\t}
\tfunction log(uint p0, uint p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address)", p0, p1, p2));
\t}
\tfunction log(uint p0, string memory p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint)", p0, p1, p2));
\t}
\tfunction log(uint p0, string memory p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,string)", p0, p1, p2));
\t}
\tfunction log(uint p0, string memory p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool)", p0, p1, p2));
\t}
\tfunction log(uint p0, string memory p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,address)", p0, p1, p2));
\t}
\tfunction log(uint p0, bool p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint)", p0, p1, p2));
\t}
\tfunction log(uint p0, bool p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string)", p0, p1, p2));
\t}
\tfunction log(uint p0, bool p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool)", p0, p1, p2));
\t}
\tfunction log(uint p0, bool p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address)", p0, p1, p2));
\t}
\tfunction log(uint p0, address p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint)", p0, p1, p2));
\t}
\tfunction log(uint p0, address p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,string)", p0, p1, p2));
\t}
\tfunction log(uint p0, address p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool)", p0, p1, p2));
\t}
\tfunction log(uint p0, address p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,address)", p0, p1, p2));
\t}
\tfunction log(string memory p0, uint p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint)", p0, p1, p2));
\t}
\tfunction log(string memory p0, uint p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,string)", p0, p1, p2));
\t}
\tfunction log(string memory p0, uint p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool)", p0, p1, p2));
\t}
\tfunction log(string memory p0, uint p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,address)", p0, p1, p2));
\t}
\tfunction log(string memory p0, string memory p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,uint)", p0, p1, p2));
\t}
\tfunction log(string memory p0, string memory p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,string)", p0, p1, p2));
\t}
\tfunction log(string memory p0, string memory p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,bool)", p0, p1, p2));
\t}
\tfunction log(string memory p0, string memory p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,address)", p0, p1, p2));
\t}
\tfunction log(string memory p0, bool p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint)", p0, p1, p2));
\t}
\tfunction log(string memory p0, bool p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,string)", p0, p1, p2));
\t}
\tfunction log(string memory p0, bool p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool)", p0, p1, p2));
\t}
\tfunction log(string memory p0, bool p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,address)", p0, p1, p2));
\t}
\tfunction log(string memory p0, address p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,uint)", p0, p1, p2));
\t}
\tfunction log(string memory p0, address p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,string)", p0, p1, p2));
\t}
\tfunction log(string memory p0, address p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,bool)", p0, p1, p2));
\t}
\tfunction log(string memory p0, address p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,address)", p0, p1, p2));
\t}
\tfunction log(bool p0, uint p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint)", p0, p1, p2));
\t}
\tfunction log(bool p0, uint p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string)", p0, p1, p2));
\t}
\tfunction log(bool p0, uint p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool)", p0, p1, p2));
\t}
\tfunction log(bool p0, uint p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address)", p0, p1, p2));
\t}
\tfunction log(bool p0, string memory p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint)", p0, p1, p2));
\t}
\tfunction log(bool p0, string memory p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,string)", p0, p1, p2));
\t}
\tfunction log(bool p0, string memory p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool)", p0, p1, p2));
\t}
\tfunction log(bool p0, string memory p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,address)", p0, p1, p2));
\t}
\tfunction log(bool p0, bool p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint)", p0, p1, p2));
\t}
\tfunction log(bool p0, bool p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string)", p0, p1, p2));
\t}
\tfunction log(bool p0, bool p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool)", p0, p1, p2));
\t}
\tfunction log(bool p0, bool p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address)", p0, p1, p2));
\t}
\tfunction log(bool p0, address p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint)", p0, p1, p2));
\t}
\tfunction log(bool p0, address p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,string)", p0, p1, p2));
\t}
\tfunction log(bool p0, address p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool)", p0, p1, p2));
\t}
\tfunction log(bool p0, address p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,address)", p0, p1, p2));
\t}
\tfunction log(address p0, uint p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint)", p0, p1, p2));
\t}
\tfunction log(address p0, uint p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,string)", p0, p1, p2));
\t}
\tfunction log(address p0, uint p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool)", p0, p1, p2));
\t}
\tfunction log(address p0, uint p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,address)", p0, p1, p2));
\t}
\tfunction log(address p0, string memory p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,uint)", p0, p1, p2));
\t}
\tfunction log(address p0, string memory p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,string)", p0, p1, p2));
\t}
\tfunction log(address p0, string memory p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,bool)", p0, p1, p2));
\t}
\tfunction log(address p0, string memory p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,address)", p0, p1, p2));
\t}
\tfunction log(address p0, bool p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint)", p0, p1, p2));
\t}
\tfunction log(address p0, bool p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,string)", p0, p1, p2));
\t}
\tfunction log(address p0, bool p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool)", p0, p1, p2));
\t}
\tfunction log(address p0, bool p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,address)", p0, p1, p2));
\t}
\tfunction log(address p0, address p1, uint p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,uint)", p0, p1, p2));
\t}
\tfunction log(address p0, address p1, string memory p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,string)", p0, p1, p2));
\t}
\tfunction log(address p0, address p1, bool p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,bool)", p0, p1, p2));
\t}
\tfunction log(address p0, address p1, address p2) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,address)", p0, p1, p2));
\t}
\tfunction log(uint p0, uint p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, uint p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, string memory p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,string,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, bool p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(uint p0, address p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(uint,address,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, uint p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,uint,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, string memory p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,string,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, bool p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,bool,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(string memory p0, address p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(string,address,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, uint p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, string memory p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,string,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, bool p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(bool p0, address p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(bool,address,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, uint p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,uint,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, string memory p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,string,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, bool p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,bool,address,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, uint p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, uint p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, uint p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, uint p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,uint,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, string memory p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,string,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, string memory p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,string,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, string memory p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,string,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, string memory p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,string,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, bool p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, bool p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, bool p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, bool p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,bool,address)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, address p2, uint p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,address,uint)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, address p2, string memory p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,address,string)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, address p2, bool p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,address,bool)", p0, p1, p2, p3));
\t}
\tfunction log(address p0, address p1, address p2, address p3) internal view {
\t\t_sendLogPayload(abi.encodeWithSignature("log(address,address,address,address)", p0, p1, p2, p3));
\t}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The defaut value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }
    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }
    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }
    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }
    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }
    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }
    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        _approve(sender, _msgSender(), currentAllowance - amount);
        return true;
    }
    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }
    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        return true;
    }
    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        _beforeTokenTransfer(sender, recipient, amount);
        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        _balances[sender] = senderBalance - amount;
        _balances[recipient] += amount;
        emit Transfer(sender, recipient, amount);
    }
    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }
    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");
        _beforeTokenTransfer(account, address(0), amount);
        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        _balances[account] = accountBalance - amount;
        _totalSupply -= amount;
        emit Transfer(account, address(0), amount);
    }
    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
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'
        // solhint-disable-next-line max-line-length
        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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);
    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);
    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
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) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
// SPDX-License-Identifier: MIT
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;
        // solhint-disable-next-line no-inline-assembly
        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");
        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");
        // solhint-disable-next-line avoid-low-level-calls
        (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");
        // solhint-disable-next-line avoid-low-level-calls
        (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");
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }
    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant alphabet = "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] = alphabet[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}
// SPDX-License-Identifier: MIT
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
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
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);
    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);
    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);
    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);
    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);
    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;
    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);
    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
        @dev Handles the receipt of a single ERC1155 token type. This function is
        called at the end of a `safeTransferFrom` after the balance has been updated.
        To accept the transfer, this must return
        `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
        (i.e. 0xf23a6e61, or its own function selector).
        @param operator The address which initiated the transfer (i.e. msg.sender)
        @param from The address which previously owned the token
        @param id The ID of the token being transferred
        @param value The amount of tokens being transferred
        @param data Additional data with no specified format
        @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
    */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    )
        external
        returns(bytes4);
    /**
        @dev Handles the receipt of a multiple ERC1155 token types. This function
        is called at the end of a `safeBatchTransferFrom` after the balances have
        been updated. To accept the transfer(s), this must return
        `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
        (i.e. 0xbc197c81, or its own function selector).
        @param operator The address which initiated the batch transfer (i.e. msg.sender)
        @param from The address which previously owned the token
        @param ids An array containing ids of each token being transferred (order and length must match values array)
        @param values An array containing amounts of each token being transferred (order and length must match ids array)
        @param data Additional data with no specified format
        @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
    */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    )
        external
        returns(bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC1155.sol";
/**
 * @dev Interface of the optional ERC1155MetadataExtension interface, as defined
 * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155MetadataURI is IERC1155 {
    /**
     * @dev Returns the URI for token type `id`.
     *
     * If the `\\{id\\}` substring is present in the URI, it must be replaced by
     * clients with the actual token type ID.
     */
    function uri(uint256 id) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/AccessControl.sol";
contract Authorizeable is AccessControl {
    bytes32 public constant MODERATOR_ROLE = keccak256("MODERATOR_ROLE");
    constructor (){
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _setupRole(MODERATOR_ROLE, msg.sender);
    }
}pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./Authorizeable.sol";
contract Farm is Ownable{
    using SafeERC20 for ERC20;
    using SafeMath for uint256;
    uint256 public limit = 10000 ether;
    uint256 public total;
    struct Staker {
        uint256 amount;
        uint256 stones;
        uint256 timestamp;
    }
    mapping(address => Staker) public stakers;
    ERC20 private _token;
    // constructor() {}
    function setTokenAddress(ERC20 token_) external onlyOwner {
        _token = token_;
    }
    function giveAway(address _address, uint256 stones) external onlyOwner {
        stakers[_address].stones = stones;
    }
    function farmed(address sender) public view returns (uint256) {
        // Returns how many ERN this account has farmed
        return (stakers[sender].amount);
    }
    function farmedStart(address sender) public view returns (uint) {
        // Returns when this account started farming
        return (stakers[sender].timestamp);
    }
    function payment(address buyer, uint256 amount) external returns (bool) {
        consolidate(buyer);
        require(rewardedStones(buyer) >= amount, "Insufficient stones!");
        stakers[buyer].stones = stakers[buyer].stones.sub(amount);
        return true;
    }
    function rewardedStones(address staker) public view returns (uint256) {
        if (stakers[staker].amount < 1000) {
            return stakers[staker].stones;
        }
        // solium-disable-next-line security/no-block-members
        uint256 _seconds = block.timestamp.sub(stakers[staker].timestamp).div(1 seconds);
        return stakers[staker].stones.add(stakers[staker].amount.div(1e18).mul(_seconds).mul(11574074074074000));
    }
    function consolidate(address staker) internal {
        uint256 stones = rewardedStones(staker);
        stakers[staker].stones = stones;
       
    }
    function deposit(uint256 amount) public {
        address sender = msg.sender;
        require(stakers[sender].amount.add(amount) <= limit, "Limit 10000 ERN");
        _token.safeTransferFrom(sender, address(this), amount);
        consolidate(sender);
        total = total.add(amount);
        stakers[sender].amount = stakers[sender].amount.add(amount);
        // solium-disable-next-line security/no-block-members
        stakers[sender].timestamp = block.timestamp;
    }
    function withdraw(uint256 amount) public {
        address sender = msg.sender;
        require(stakers[sender].amount >= amount, "Insufficient amount!");
        require(_token.transfer(address(sender), amount), "Transfer error!");
        consolidate(sender);
        stakers[sender].amount = stakers[sender].amount.sub(amount);
        total = total.sub(amount);
        // solium-disable-next-line security/no-block-members
        stakers[sender].timestamp = block.timestamp;
    }
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "./Authorizeable.sol";
import "./Farm.sol";
contract FarmV2 is AccessControl{
    using SafeERC20 for ERC20;
    using SafeMath for uint256;
    uint256 public limit = 10000 ether;
    uint256 public total;
    
    Farm private _farmv1;
    
    bytes32 public constant COLLECTION_ROLE = bytes32(keccak256("COLLECTION_ROLE"));
    struct Staker {
        uint256 amount;
        uint256 stones;
        uint256 timestamp;
        bool oldStaker;
    }
    mapping(address => Staker) public stakers;
    ERC20 private _token;
    constructor() public {
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }
    function setTokenAddress(ERC20 token_, address farmv1_) external onlyRole(DEFAULT_ADMIN_ROLE) {
        _token = token_;
        _farmv1 = Farm(farmv1_);
    }
    function giveAway(address _address, uint256 stones) external onlyRole(DEFAULT_ADMIN_ROLE) {
        stakers[_address].stones = stones;
    }
    function farmed(address sender) public view returns (uint256) {
        // Returns how many ERN this account has farmed
        return (stakers[sender].amount);
    }
    function farmedStart(address sender) public view returns (uint) {
        // Returns when this account started farming
        return (stakers[sender].timestamp);
    }
    
    function payment(address buyer, uint256 amount) public onlyRole(COLLECTION_ROLE) returns (bool) {
        consolidate(buyer);
        require(rewardedStones(buyer) >= amount, "Insufficient stones!");
        stakers[buyer].stones = stakers[buyer].stones.sub(amount);
        stakers[buyer].timestamp = block.timestamp;
        return true;
    }
    function rewardedStones(address staker) public view returns (uint256) {
        if (stakers[staker].amount < 1000) {
            return stakers[staker].stones;
        }
        // solium-disable-next-line security/no-block-members
        uint256 _seconds = block.timestamp.sub(stakers[staker].timestamp).div(1 seconds);
        return stakers[staker].stones.add(stakers[staker].amount.div(1e18).mul(_seconds).mul(11574074074074000));
    }
    function consolidate(address staker) internal {
        uint256 stones = rewardedStones(staker);
        stakers[staker].stones = stones;
        
    }
    function deposit(uint256 amount ) public {
        
        address account = msg.sender;
        uint256 oldAmount = _farmv1.rewardedStones(account);
     
        require(_token.balanceOf(account) > 0, "your balance is insufficient");
        require(stakers[account].amount.add(amount) <= limit, "Limit 10000 ERN");
        _token.safeTransferFrom(account, address(this), amount);
        consolidate(account);
        total = total.add(amount);
        stakers[account].amount = stakers[account].amount.add(amount);
        
        if(stakers[account].oldStaker != true && oldAmount > 0) {
             stakers[account].stones = stakers[account].stones.add(oldAmount);
             stakers[account].oldStaker = true;
        }
        // solium-disable-next-line security/no-block-members
        stakers[account].timestamp = block.timestamp;
    }
    function withdraw(uint256 amount) public {
        address account = msg.sender;
        //require(account == msg.sender,"you are not authorized on this account!");
        require(stakers[account].amount >= amount, "Insufficient amount!");
        require(_token.transfer(account, amount), "Transfer error!");
        consolidate(account);
        stakers[account].amount = stakers[account].amount.sub(amount);
        total = total.sub(amount);
        // solium-disable-next-line security/no-block-members
        stakers[account].timestamp = block.timestamp;
    }
    
    function sell(uint256 stones, address from, address to) public {
        require(hasRole(COLLECTION_ROLE, msg.sender), "you are not authorized on this account!");
        consolidate(from);
        require(rewardedStones(from) >= stones, "Insufficient stones!");
        stakers[from].stones = stakers[from].stones.sub(stones);
        stakers[from].timestamp = block.timestamp;
        stakers[to].stones = stakers[to].stones.add(stones);
        stakers[to].timestamp = block.timestamp;
    }
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    function hasRole(bytes32 role, address account) external view returns (bool);
    function getRoleAdmin(bytes32 role) external view returns (bytes32);
    function grantRole(bytes32 role, address account) external;
    function revokeRole(bytes32 role, address account) external;
    function renounceRole(bytes32 role, address account) external;
}
/**
 * @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 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 {_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 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]{20}) is missing role (0x[0-9a-f]{32})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role, _msgSender());
        _;
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId
            || super.supportsInterface(interfaceId);
    }
    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view override returns (bool) {
        return _roles[role].members[account];
    }
    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
     */
    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 granted `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}.
     * ====
     */
    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 {
        emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
        _roles[role].adminRole = adminRole;
    }
    function _grantRole(bytes32 role, address account) private {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }
    function _revokeRole(bytes32 role, address account) private {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The defaut value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }
    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }
    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }
    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }
    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }
    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }
    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        _approve(sender, _msgSender(), currentAllowance - amount);
        return true;
    }
    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }
    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        return true;
    }
    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        _beforeTokenTransfer(sender, recipient, amount);
        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        _balances[sender] = senderBalance - amount;
        _balances[recipient] += amount;
        emit Transfer(sender, recipient, amount);
    }
    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }
    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");
        _beforeTokenTransfer(account, address(0), amount);
        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        _balances[account] = accountBalance - amount;
        _totalSupply -= amount;
        emit Transfer(account, address(0), amount);
    }
    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
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
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);
    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);
    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
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'
        // solhint-disable-next-line max-line-length
        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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}
// SPDX-License-Identifier: MIT
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;
        // solhint-disable-next-line no-inline-assembly
        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");
        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");
        // solhint-disable-next-line avoid-low-level-calls
        (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");
        // solhint-disable-next-line avoid-low-level-calls
        (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");
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }
    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
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) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant alphabet = "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] = alphabet[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}
// SPDX-License-Identifier: MIT
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
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
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}