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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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



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

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

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



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

pragma solidity ^0.8.0;

import "../Strings.sol";

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

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

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

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

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

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

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

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

        return (signer, RecoverError.NoError);
    }

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

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

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

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

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



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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



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

pragma solidity ^0.8.0;

import "./math/Math.sol";

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

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

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

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

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

// File: contracts/interfaces/ICoreRewarder.sol



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

// ______  __  __   ______       _____    __  __   _____    ______
// /\__  _\/\ \_\ \ /\  ___\     /\  __-. /\ \/\ \ /\  __-. /\  ___\
// \/_/\ \/\ \  __ \\ \  __\     \ \ \/\ \\ \ \_\ \\ \ \/\ \\ \  __\
//   \ \_\ \ \_\ \_\\ \_____\    \ \____- \ \_____\\ \____- \ \_____\
//    \/_/  \/_/\/_/ \/_____/     \/____/  \/_____/ \/____/  \/_____/
//

interface ICoreRewarder {
    function stake(
        uint256[] calldata tokenIds
    ) external;

    function withdraw(
        uint256[] calldata tokenIds
    ) external;

    function claim(uint256[] calldata tokenIds) external;

    function earned(uint256[] memory tokenIds)
        external
        view
        returns (uint256);

    function lastClaimTimesOfTokens(uint256[] memory tokenIds)
        external
        view
        returns (uint256[] memory);

    function isOwner(address owner, uint256 tokenId)
        external
        view
        returns (bool);

    function tokensOfOwner(address _owner)
        external
        view
        returns (uint256[] memory);

    function stakedTokensOfOwner(address owner)
        external
        view
        returns (uint256[] memory);
}

// File: contracts/interfaces/IDelegationRegistry.sol



// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.0;

interface IDelegationRegistry {
    /**
     * @notice Returns true if the address is delegated to act on your behalf for a token contract or an entire vault
     * @param delegate The hotwallet to act on your behalf
     * @param contract_ The address for the contract you're delegating
     * @param vault The cold wallet who issued the delegation
     */
    function checkDelegateForContract(address delegate, address vault, address contract_)
        external
        view
        returns (bool);
}

// File: contracts/interfaces/IMetro.sol



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

//                        888
//                        888
//                        888
// 88888b.d88b.   .d88b.  888888 888d888 .d88b.
// 888 "888 "88b d8P  Y8b 888    888P"  d88""88b
// 888  888  888 88888888 888    888    888  888
// 888  888  888 Y8b.     Y88b.  888    Y88..88P
// 888  888  888  "Y8888   "Y888 888     "Y88P"

// 888                    d8b          888                          888
// 888                    Y8P          888                          888
// 888                                 888                          888
// 88888b.  888  888      888 88888b.  888888       8888b.  888d888 888888
// 888 "88b 888  888      888 888 "88b 888             "88b 888P"   888
// 888  888 888  888      888 888  888 888         .d888888 888     888
// 888 d88P Y88b 888      888 888  888 Y88b.       888  888 888     Y88b.
// 88888P"   "Y88888      888 888  888  "Y888      "Y888888 888      "Y888
//               888
//          Y8b d88P
//           "Y88P"

struct MetroTokenProperties {
    uint256 mode; // 0: Curate, 1: Evolve, 2: Lock
    uint256 progress;
    uint256 maxProgress;
    uint256 progressSeedStep;
    uint256 curateCount;
    bytes32 seed;
    bytes32[] progressSeeds;
}

interface IMetro {
    function mint(address target, uint256 count) external;
    function getTokenProperties(uint256 tokenId)
        external
        view
        returns (MetroTokenProperties memory);
}

// File: contracts/interfaces/IMetroMinter.sol



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

//                        888
//                        888
//                        888
// 88888b.d88b.   .d88b.  888888 888d888 .d88b.
// 888 "888 "88b d8P  Y8b 888    888P"  d88""88b
// 888  888  888 88888888 888    888    888  888
// 888  888  888 Y8b.     Y88b.  888    Y88..88P
// 888  888  888  "Y8888   "Y888 888     "Y88P"

// 888                    d8b          888                          888
// 888                    Y8P          888                          888
// 888                                 888                          888
// 88888b.  888  888      888 88888b.  888888       8888b.  888d888 888888
// 888 "88b 888  888      888 888 "88b 888             "88b 888P"   888
// 888  888 888  888      888 888  888 888         .d888888 888     888
// 888 d88P Y88b 888      888 888  888 Y88b.       888  888 888     Y88b.
// 88888P"   "Y88888      888 888  888  "Y888      "Y888888 888      "Y888
//               888
//          Y8b d88P
//           "Y88P"

interface IMetroMinter {
    function usedTheDudesTokenIds(uint256 tokenId) external view returns (bool);

    function mintCountForPixelsIncAddresses(
        address _address
    ) external view returns (uint256);

    function mintCountForCollabAddresses(
        address _address
    ) external view returns (uint256);
}

// File: contracts/MetroMinterV2.sol



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

//                        888
//                        888
//                        888
// 88888b.d88b.   .d88b.  888888 888d888 .d88b.
// 888 "888 "88b d8P  Y8b 888    888P"  d88""88b
// 888  888  888 88888888 888    888    888  888
// 888  888  888 Y8b.     Y88b.  888    Y88..88P
// 888  888  888  "Y8888   "Y888 888     "Y88P"

// 888                    d8b          888                          888
// 888                    Y8P          888                          888
// 888                                 888                          888
// 88888b.  888  888      888 88888b.  888888       8888b.  888d888 888888
// 888 "88b 888  888      888 888 "88b 888             "88b 888P"   888
// 888  888 888  888      888 888  888 888         .d888888 888     888
// 888 d88P Y88b 888      888 888  888 Y88b.       888  888 888     Y88b.
// 88888P"   "Y88888      888 888  888  "Y888      "Y888888 888      "Y888
//               888
//          Y8b d88P
//           "Y88P"

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import {MerkleProofLib} from "solmate/src/utils/MerkleProofLib.sol";
import {IMetroMinter} from "./interfaces/IMetroMinter.sol";

import {IMetro} from "./interfaces/IMetro.sol";
import {ICoreRewarder} from "./interfaces/ICoreRewarder.sol";
import {IDelegationRegistry} from "./interfaces/IDelegationRegistry.sol";

contract MetroMinterV2 is Ownable {
    IMetro public immutable metro;
    ICoreRewarder public immutable theDudesRewarder;
    IDelegationRegistry public immutable delegationRegistry;
    IMetroMinter public immutable minterV1;

    bool isTheDudesMintOpen;
    bool isThePixelsMintOpen;
    bool isCollabMintOpen;
    bool isPublicMintOpen;
    address publicMintSigner = 0x305e0A36c6A43fbA881AF6dcD1e0703579a18033;

    mapping(uint256 => bool) public v2usedTheDudesTokenIds;
    mapping(address => uint256) public v2mintCountForPixelsIncAddresses;
    mapping(address => uint256) public v2mintCountForCollabAddresses;
    mapping(address => bool) public addressesForPublicMint;

    bytes32 public pixelsIncMerkleProof;
    bytes32 public communityMerkleProof;

    error MintNotOpen();
    error InvalidTheDudeOwner();
    error AlreadyMinted();
    error InvalidProof();
    error NotEligibleForMint();
    error InvalidAmount();
    error InvalidSignature();

    constructor(
        address metroAddress,
        address theDudesRewarderAddress,
        address delegateRegistry,
        address metroMinterV1
    ) {
        metro = IMetro(metroAddress);
        theDudesRewarder = ICoreRewarder(theDudesRewarderAddress);
        delegationRegistry = IDelegationRegistry(delegateRegistry);
        minterV1 = IMetroMinter(metroMinterV1);
    }

    // - owner operations

    function setisMintEnabled(
        bool _isTheDudesMintOpen,
        bool _isThePixelsMintOpen,
        bool _isCollabMintOpen,
        bool _isPublicMintOpen
    ) public onlyOwner {
        isTheDudesMintOpen = _isTheDudesMintOpen;
        isThePixelsMintOpen = _isThePixelsMintOpen;
        isCollabMintOpen = _isCollabMintOpen;
        isPublicMintOpen = _isPublicMintOpen;
    }

    function updatePixelsIncMerkleProof(
        bytes32 _pixelsIncMerkleProof
    ) public onlyOwner {
        pixelsIncMerkleProof = _pixelsIncMerkleProof;
    }

    function updateCollabMerkleProof(
        bytes32 _communityMerkleProof
    ) public onlyOwner {
        communityMerkleProof = _communityMerkleProof;
    }

    function updatePublicMintSigner(
        address _publicMintSigner
    ) public onlyOwner {
        publicMintSigner = _publicMintSigner;
    }

    function getUsedTheDudesTokenIds(
        uint256 _tokenId
    ) public view returns (bool) {
        return
            minterV1.usedTheDudesTokenIds(_tokenId) ||
            v2usedTheDudesTokenIds[_tokenId];
    }

    function getMintCountForPixelsIncAddresses(
        address _address
    ) public view returns (uint256) {
        return
            minterV1.mintCountForPixelsIncAddresses(_address) +
            v2mintCountForPixelsIncAddresses[_address];
    }

    function getMintCountForCollabAddresses(
        address _address
    ) public view returns (uint256) {
        return
            minterV1.mintCountForCollabAddresses(_address) +
            v2mintCountForCollabAddresses[_address];
    }

    // - utils

    function getMintAvailibility()
        public
        view
        returns (bool, bool, bool, bool)
    {
        return (
            isTheDudesMintOpen,
            isThePixelsMintOpen,
            isCollabMintOpen,
            isPublicMintOpen
        );
    }

    // - delegate.cash requester

    function getRequester(address vault) public view returns (address) {
        if (vault != address(0)) {
            bool isDelegateValid = delegationRegistry.checkDelegateForContract(
                msg.sender,
                vault,
                address(this)
            );
            if (isDelegateValid) {
                return vault;
            }
        }
        return msg.sender;
    }

    // - 'the dudes' mint

    function availableTheDudesForMint(
        address vault
    ) public view returns (uint256[] memory, bool[] memory) {
        address requester = getRequester(vault);
        return availableTheDudesForMintWithRequester(requester);
    }

    function availableTheDudesForMintWithRequester(
        address requester
    ) public view returns (uint256[] memory, bool[] memory) {
        uint256[] memory theDudesTokens = theDudesRewarder.tokensOfOwner(
            requester
        );
        bool[] memory tokenStatus = new bool[](theDudesTokens.length);

        for (uint256 i; i < theDudesTokens.length; i++) {
            tokenStatus[i] = getUsedTheDudesTokenIds(theDudesTokens[i]);
        }
        return (theDudesTokens, tokenStatus);
    }

    function mintWithTheDudes(
        address vault,
        uint256[] calldata tokenIds
    ) public {
        if (!isTheDudesMintOpen) {
            revert MintNotOpen();
        }
        address requester = getRequester(vault);
        uint256 i;
        uint256 length = tokenIds.length;
        do {
            uint256 tokenId = tokenIds[i];
            if (!theDudesRewarder.isOwner(requester, tokenId)) {
                revert InvalidTheDudeOwner();
            }
            if (getUsedTheDudesTokenIds(tokenId)) {
                revert AlreadyMinted();
            }
            v2usedTheDudesTokenIds[tokenId] = true;
        } while (++i < length);

        metro.mint(requester, length);
    }

    // - 'the pixels inc' mint

    function mintAmountForPixelInc(
        address vault,
        uint256 quantity,
        bytes32[] calldata merkleProof
    ) public view returns (uint256) {
        address requester = getRequester(vault);
        return
            mintAmountForPixelIncWithRequester(
                requester,
                quantity,
                merkleProof
            );
    }

    function mintAmountForPixelIncWithRequester(
        address requester,
        uint256 quantity,
        bytes32[] calldata merkleProof
    ) public view returns (uint256) {
        bytes32 node = keccak256(abi.encodePacked(requester, quantity));
        if (!MerkleProofLib.verify(merkleProof, pixelsIncMerkleProof, node)) {
            revert InvalidProof();
        }
        return quantity - getMintCountForPixelsIncAddresses(requester);
    }

    function mintWithPixelIncAddress(
        address vault,
        uint256 selectedQuantity,
        uint256 quantity,
        bytes32[] calldata merkleProof
    ) public {
        address requester = getRequester(vault);
        if (!isThePixelsMintOpen) {
            revert MintNotOpen();
        }
        uint256 availableAmount = mintAmountForPixelIncWithRequester(
            requester,
            quantity,
            merkleProof
        );
        if (availableAmount == 0) {
            revert InvalidAmount();
        }
        if (selectedQuantity > quantity) {
            revert InvalidAmount();
        }
        if (selectedQuantity > availableAmount) {
            revert InvalidAmount();
        }
        v2mintCountForPixelsIncAddresses[requester] += selectedQuantity;
        metro.mint(requester, selectedQuantity);
    }

    // - community collab mint

    function mintAmountForCollab(
        address vault,
        uint256 quantity,
        bytes32[] calldata merkleProof
    ) public view returns (uint256) {
        address requester = getRequester(vault);
        return
            mintAmountForCollabWithRequester(requester, quantity, merkleProof);
    }

    function mintAmountForCollabWithRequester(
        address requester,
        uint256 quantity,
        bytes32[] calldata merkleProof
    ) public view returns (uint256) {
        bytes32 node = keccak256(abi.encodePacked(requester, quantity));
        if (!MerkleProofLib.verify(merkleProof, communityMerkleProof, node)) {
            revert InvalidProof();
        }
        return quantity - getMintCountForCollabAddresses(requester);
    }

    function mintWithCollabAddress(
        address vault,
        uint256 selectedQuantity,
        uint256 quantity,
        bytes32[] calldata merkleProof
    ) public {
        address requester = getRequester(vault);
        if (!isCollabMintOpen) {
            revert MintNotOpen();
        }
        uint256 availableAmount = mintAmountForCollabWithRequester(
            requester,
            quantity,
            merkleProof
        );
        if (availableAmount == 0) {
            revert InvalidAmount();
        }
        if (selectedQuantity > quantity) {
            revert InvalidAmount();
        }
        if (selectedQuantity > availableAmount) {
            revert InvalidAmount();
        }
        v2mintCountForCollabAddresses[requester] += selectedQuantity;
        metro.mint(requester, selectedQuantity);
    }

    // - public mint

    function mint(bytes memory signature) public {
        if (!isPublicMintOpen) {
            revert MintNotOpen();
        }
        bytes32 messageHash = ECDSA.toEthSignedMessageHash(
            abi.encode(msg.sender)
        );
        (address signer, ) = ECDSA.tryRecover(messageHash, signature);
        if (signer != publicMintSigner) {
            revert InvalidSignature();
        }
        if (addressesForPublicMint[msg.sender]) {
            revert AlreadyMinted();
        }
        addressesForPublicMint[msg.sender] = true;
        metro.mint(msg.sender, 1);
    }
}

// File: solmate/src/utils/MerkleProofLib.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/// @notice Gas optimized merkle proof verification library.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/MerkleProofLib.sol)
library MerkleProofLib {
    function verify(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool isValid) {
        assembly {
            if proof.length {
                // Left shifting by 5 is like multiplying by 32.
                let end := add(proof.offset, shl(5, proof.length))

                // Initialize offset to the offset of the proof in calldata.
                let offset := proof.offset

                // Iterate over proof elements to compute root hash.
                // prettier-ignore
                for {} 1 {} {
                    // Slot where the leaf should be put in scratch space. If
                    // leaf > calldataload(offset): slot 32, otherwise: slot 0.
                    let leafSlot := shl(5, gt(leaf, calldataload(offset)))

                    // Store elements to hash contiguously in scratch space.
                    // The xor puts calldataload(offset) in whichever slot leaf
                    // is not occupying, so 0 if leafSlot is 32, and 32 otherwise.
                    mstore(leafSlot, leaf)
                    mstore(xor(leafSlot, 32), calldataload(offset))

                    // Reuse leaf to store the hash to reduce stack operations.
                    leaf := keccak256(0, 64) // Hash both slots of scratch space.

                    offset := add(offset, 32) // Shift 1 word per cycle.

                    // prettier-ignore
                    if iszero(lt(offset, end)) { break }
                }
            }

            isValid := eq(leaf, root) // The proof is valid if the roots match.
        }
    }
}