Contract 0xAFe94131cE6Ba7f2766cc4D43315246D3518aAEe

 
Txn Hash
Method
Block
From
To
Value
0x042d4799677d05fec7897d4654d430c79f9c97d7f88711015710405028259810Set Approval For...152938812022-08-07 7:43:0810 hrs 59 mins ago0x350cbcd4936dd7d8801c04417b7073710a4ecb81 IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00018618 3.99372917
0xfeeeb6b658978a465cc839781cab2d1b43ed4ead7e445c6b6230f918d83f6601Set Approval For...152674412022-08-03 4:49:404 days 13 hrs agoENS Name noteatbutt.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00029798 6.39198781
0x4044f9f948205df07011f43d70f6cfa30d6a31cb3e685b1250806c968b409110Set Approval For...152670052022-08-03 3:13:124 days 15 hrs agoENS Name idonotknowwhatimdoing.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.0013985730
0xe57b926ea1990f3d915938dcedafc8d3f6c97d7018b788e4081b06d940487c20Set Approval For...152300582022-07-28 8:55:2510 days 9 hrs agoENS Name onesizefitsall.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00022148 8.9342521
0x274e0dd9ae0e1de984124ca5928242c58bfdcc4e5eadfaf6c3bd03ed2ccae3b4Transfer From152154792022-07-26 2:35:0212 days 16 hrs agoENS Name yeooo.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00248777 43.23550517
0xb385be7a0fbb17b1d1f9c4827c50788fb36631e96b4d58977f4cee18c1106164Transfer From152154752022-07-26 2:33:0312 days 16 hrs ago0x056565846144b2b1ada857dfe67cb69e1b3c048f IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00206757 35.93284553
0x44955a92946798e207eff0002425229037ab2c71a6a8cc7872b154b1d7c87b45Set Approval For...152084462022-07-25 0:08:5813 days 18 hrs agoENS Name thotpatrol.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00049 10.51085966
0x7b2788591697cb4429e83839eb767d355c319761e7e11688d11dc0eb74f50b6aSet Approval For...152058602022-07-24 14:30:3514 days 4 hrs agoENS Name jeremyar.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00064404 13.81500281
0xd9ece28217d527504cb98cd63481595fc666df5d3638a1df405aa811cfebd33bSet Approval For...151788242022-07-20 9:58:1118 days 8 hrs ago0xa11d442e1cf701a27431f695ddb95e21288cc7b3 IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00084666 18.16130569
0x7bc231a8623e682d86290c574d6139889312555a90716455275f66f528b805ccSet Approval For...151706072022-07-19 3:18:0319 days 15 hrs agoENS Name *aceof💎.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00150765 32.33997229
0x9a075eac768f8394d60033b2a9b718dc146a71567532bb9b8e17af6e55bd7730Set Approval For...151632392022-07-18 0:00:0320 days 18 hrs ago0x88ffd00e53684c4b6dd20ce8db90a2926d4a0f7e IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00056438 12.10636337
0xdd5db7df508ae5fa09f66be851c67699074ce7989291de27c30541e6877d82c1Set Approval For...151464792022-07-15 9:34:3323 days 9 hrs ago0x72bc237cf598505dc00d4fcc23b1663e206455a9 IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.0004683 10.04541503
0x0ccb6c2bb898e7cf0a09b0a420033c3369f0545c61bed07457cc0a18db8b05efTransfer From151453252022-07-15 5:12:0123 days 13 hrs agoENS Name yeooo.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00067197 11.67831517
0x5bebadcc4819e08c35e6cf6f2aa17dd916852d19003afaea0cd679b1f0b77fd7Set Approval For...151393442022-07-14 7:28:5524 days 11 hrs ago0x7f1627556ee7b635b1236600c2d0679d25ec7ff6 IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.0006872614.74217571
0x8030e390a2e016175804e29b49199e60fc9378e9669cc99b88341e216070d55cSet Approval For...151293702022-07-12 18:05:1626 days 37 mins ago0x8c4daad2233848217489e0f33065979cd8eee30f IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00130927 28.08466172
0x31a75d1f7eb640193db5701b0d5828d854943f868b65bb98607d940aab1897daTransfer From151172522022-07-10 21:19:3927 days 21 hrs ago0xb8f6efef0c0a2d73379c25842212c96c133ba58e IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00093998 16.33611529
0x46c16fddb543a8b0f50b22e993886061cf00bf8a5ad3de7e601ac3f8a093f848Set Approval For...151138112022-07-10 8:26:2528 days 10 hrs ago0x02803ab02d4bd486e160a1be97d0db44450f0c6f IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00042235 9.0433972
0x6f6bc2731f099884d473173f6ec49be8f6ed052bd3eeaeb3c2bd452fa2b74050Set Approval For...151129462022-07-10 5:17:2328 days 13 hrs ago0xf65e1e27c0911154593fd612cf045d8fcf90070f IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00052748 11.31476841
0x552193c8654a630c4f5747bcace9485368f707016fd215dde4ae178f7ac78293Set Approval For...151024722022-07-08 14:35:0330 days 4 hrs ago0x0d5fd18b4001bfaa037c5880dabd92c51e5a8d69 IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00133733 28.68651764
0xdb7916312b7399b4df92f0a85e73d4e4155de71e9c95befe6b94556e351a2285Set Approval For...150709662022-07-03 17:39:4235 days 1 hr ago0x69147b4c6c18a3323f4b7a1bc8f003847ab4891a IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00098927 21.22037508
0x502ca167570a166f15fdadad45dba0a30ad667aa6b1814a5870c56c7ba045503Set Approval For...150684402022-07-03 8:18:3435 days 10 hrs agoENS Name 45069.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00053321 11.43778336
0xf260fae7d11560c0aebc8097a2684915c7fe80836495b05d89b724a220033b88Set Approval For...150635722022-07-02 14:13:1736 days 4 hrs ago0xf23b08df3d70494f430110db8ea1519dd67f1c16 IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00084225 18.066796
0xc1d927dc7b4d3fa27440bfcb0ab1c10aaaf0c28908c939a2ebad908d73a1bf6eSet Approval For...150499802022-06-30 10:47:0838 days 7 hrs ago0x251a0be0e10f5dce6908ed3ec3777fc71cc5b420 IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00082945 17.79228662
0x9a11f7b9b5d4aa1fdfd8b2d10a7d5c93e8628bb792793bc1505f7e1841a427f2Set Approval For...150450882022-06-29 12:49:5639 days 5 hrs ago0x44d1bc1f5a586ac88678a3f46a6d06daf8653a4b IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00201875 43.30327455
0xf9de913109eb6a7bb6fbe1345a179ed606fd75a7ce3040730384f3f658371e70Set Approval For...150446422022-06-29 10:51:1439 days 7 hrs agoENS Name sayla.eth IN  0xafe94131ce6ba7f2766cc4d43315246d3518aaee0 Ether0.00175998 37.75242227
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Contract Source Code Verified (Exact Match)

Contract Name:
Mettimoto

Compiler Version
v0.8.9+commit.e5eed63a

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2022-06-10
*/

// ████████████████████████████████████████████████████████████████████████████████
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    // ███▐║▓▒___ ╣╝╚╢▒│α╛╬╠╠╠▒Q╘:⌐╚╝╚Θ╠╬▒m║╣╬╩╓╠╙╩╩╛╣▀╚Q╠╠░╬╬╣▒╚╠╠░╚╠╩φ║╣«â–‘«â•™â• â•šâ•™â–’╠╣▌██
    // ███]▀▀╣▓Æ╣╣╝╝╝╝▒╠╠╠╠╠╠╠▒╠▒╠║╠╠╠╠╠▒φ▒╠╠╠▒▒▒]╠▒╬▒╠╠╠╠╠▒╠╠╠@╠▒▒▒▒╠╣╝╝╝╣▒▒╠╠╠╠╣╬╣]██
    // ███▄╠▓▓██▓▓▓▄▄▒▄▓QQQ▄╗╗╗╗▄▄▄Qφ╦╦▀▓▒Q░≈╩▀╩╙╠▒░╩╩╩╩▒╠╠╠╠╠▄▄▄▄▄╫╫╫▄▄╣╗╗▄▄▄▄▄▄▄▒▒▓██
    // ██▌▓▓▓▓▓▓█▀╬███▓▓▓▓▓▓▓╣▓▓╣▓▓▓▓▓█▓╣▓▓▓▓▓██║█╣╠╠╠╬╠║█▓╬╠╠╠╠╠╬╬╠║╬╠╠╠╣▓▓▓▓▓▓▓▓▓║▀██
    // ██▌▒║▓╣▓║▓╬╣▓▓█╠▓▓▓╬▓▓▓▓▓╬▀║▀░╬▒╩▀▓╝▓╣╣╩╠║╣╣▒╝║╣▒@╠╩╣╣║▒║╩φ╣╣╠╠╠▒φ╣║▓╣▒╬╩╩╠╣╚]██
    // ███▐▓▓▓║▒▒▓╣▓▓▓╣╬▓╠▓▒▓╣▓▓▓▓▓▓╬▒▓▓▓▓▓▒▒╣▒▓╣▓▒φ▒╣▒╬▒▓▓▒╣╬▒▒╣╬╬╠╣╠╠╠▒╣▓▒╬╠╣▒▒╢╣▌▓▓█
    // ███║▓▓▓▓▓▓▓▓▓▓╬▓║▓▓▓▓╣╬║▓╣╬╣▓▓╣╣╣╣╣╬╬╠╬▒╣╬╠╠║▓▓▓╣╣╬╬╣╣╬▒▒╬╬╬╬╣╣╣╠╠║╬╠╠╬╣╬╬╣╣▒╓▒█
    // ███║ü▓╬╣╣╣▓▓▓▒╣╬▓▓▒╩╬╬╠▒╣╬╬▒╣░░║╠░╠╩░╩░╠╠╣╠░║╣╩╠╚╚░╠╣╬░╠╣╠▒φ▒╚φ░║╬░╠╠╬╣╣╣╣╣▓░▄██
    // ███▌║▒╬╣▓▓╣╠▒╣▓╣▓▓▒╢╣▒╣▒▓▒╣▒║╣╣╬╬╠▒╣▒╣▒╣╠▒╣╬╠▒╬╬╣╣╠╠╠▒╣╣╬▒▒║╣╬▒╬╬╬║╣╣▒╣╣╣╣╬╬╙███
    // ███▌╠╬╬╣▓▓╣╣▒▓╣╣╬╬╬╬╬╣╬╠╠╠╠╠╠╬▒║╬╬╠╬╩╬▒╬╠╝╣╬╬╠╠╠╠╠╝╠╠╠╠╠╠╬║╠╠╣╬╠╠╠╬╣╣╣╣╣╣╣╣▌'███
    // ███▌Γ╬╬╣╣╣╣╣╣╠╬╠╬╬╬╠╠╠╠╠╠╬╬╬▒╝▒╠φ╣#░╠▒╚▒▒▒╠▒▒╠╠φ╬▒▒╠φ╠╠╠╠╠╠╠╣╣╠╠╠╠╠╣╣╣╣╬╣╣╣▒████
    // ███▌▓╬╬╬╬╬╠╠╬╬╠╠╠╠╠╠╠╣╣╣╣╣╣╣╣╣╣╣╬╠╣╣╣╣╬╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠║╣╣╬╠╠╠╠╠╠╣╣╣╬╬╬╣╣▒▓███
    // ███▌╚╬╬╠╬╬╠╠╠╠╠╠╠╣╣╣╣╣╬╠╠╬╣╬╣╬╣╣╬╬╬╬╬╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╣╬╠╬╬╬╠╠╠╠╠╠║╣╣╣╣╣╬╣╣╣▒████
    // ███▌╣╬╬╬╬╠╠╠╠╣╣╣╣╣╠╠╠╠╬╣╠╝▒╣╣╣╝╣╬▒▒╩╠╠╩╬╠╠╬╠╬╠╠╠╠╠╝╝╠╣╩╚╠╣╬╠╠╠╠╣╠╠╠╠╬╬╣╣╣╣╣░;███
    // ███░▓▒╣╣╠╬╬╣╣╠╠╠╠╠╠╠╠╠╣▒▒╣╣▒▒╬▒╬╠╠╠▒╠╬▒φ╠φ╠╬╬φ╣▒▒φ▒╬╣╬╠╬╬╠╠╠╠╠╠╠╠╠╠╬╬╬╣╣╣╣╣▒▄███
    // ███╙▓╬╠╠╠╠╠╠╠╠╠╠╠╠╣╣╣╣╣╣╬╠╠╠╠╠╠╠╠╠╠╠╠╩╠║╠╠╠╠╬╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╣╣╣╬╠╠╠╠╠╣╣╣╣'████
    // ███▌▓╬╬╠╠║╬╠╠╠╠╬╠╬╬╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╬░╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╬╬╣╣╠╬╣╠╠╠╠╠╣╠╠╠╠╠╠▒║███
    // ███▌▀▓╚╝╩╣╣╬╬╠▒╚╚║╠╠╠╬╙╚╝╝╝╜╙╚╚╙╣╠╬╚╠╬╬╬╠╠╩╠╠╠╠╬╣╣╣╣▓▓╣▀▀╣╣╣╬╬╬╣╠╣╣╣╣╣╣╣╝╣╣╣]╠██
    // ████████████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓███▄▄▄▄▄▄█▓▄▒╠╠▒QQQ▄Q▄▄▄▄▄▓▓██▄▄▄▄▄▄▄▄▄╗╗╗@▒▒▄▓██
    // ████████████████████████████████████████████████████████████████████████████████

// Mettimoto is a contemporary art NFT collection from Pumpametti, paying homage to Satoshi Nakamoto and Rare Pepes.
// 1000 free mint, mint from contract, 1 mint per wallet.
// To mint, go to "Write Contract" on ethersacn, use the "3. mint" function, input 0 at mint, 1 at numberOfTokens (uint256). 
// Website: https://www.pumpametti.com/mettimoto
// Twitter: https://twitter.com/pumpametti
// Art lives forever, stays on your mind no matter the location.

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


// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)

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 generally not needed starting with Solidity 0.8, since 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. 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;
        }
    }
}

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol


// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

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

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

        _;

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

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


// 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/access/Ownable.sol


// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @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 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 {
        _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: erc721a/contracts/IERC721A.sol


// ERC721A Contracts v4.0.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

/**
 * @dev Interface of an ERC721A compliant contract.
 */
interface IERC721A {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

    /**
     * The token does not exist.
     */
    error ApprovalQueryForNonexistentToken();

    /**
     * The caller cannot approve to their own address.
     */
    error ApproveToCaller();

    /**
     * The caller cannot approve to the current owner.
     */
    error ApprovalToCurrentOwner();

    /**
     * Cannot query the balance for the zero address.
     */
    error BalanceQueryForZeroAddress();

    /**
     * Cannot mint to the zero address.
     */
    error MintToZeroAddress();

    /**
     * The quantity of tokens minted must be more than zero.
     */
    error MintZeroQuantity();

    /**
     * The token does not exist.
     */
    error OwnerQueryForNonexistentToken();

    /**
     * The caller must own the token or be an approved operator.
     */
    error TransferCallerNotOwnerNorApproved();

    /**
     * The token must be owned by `from`.
     */
    error TransferFromIncorrectOwner();

    /**
     * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.
     */
    error TransferToNonERC721ReceiverImplementer();

    /**
     * Cannot transfer to the zero address.
     */
    error TransferToZeroAddress();

    /**
     * The token does not exist.
     */
    error URIQueryForNonexistentToken();

    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     *
     * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens.
     */
    function totalSupply() external view returns (uint256);

    // ==============================
    //            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);

    // ==============================
    //            IERC721
    // ==============================

    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    // ==============================
    //        IERC721Metadata
    // ==============================

    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// File: erc721a/contracts/ERC721A.sol


// ERC721A Contracts v4.0.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;


/**
 * @dev ERC721 token receiver interface.
 */
interface ERC721A__IERC721Receiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is IERC721A {
    // Mask of an entry in packed address data.
    uint256 private constant BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;

    // The bit position of `numberMinted` in packed address data.
    uint256 private constant BITPOS_NUMBER_MINTED = 64;

    // The bit position of `numberBurned` in packed address data.
    uint256 private constant BITPOS_NUMBER_BURNED = 128;

    // The bit position of `aux` in packed address data.
    uint256 private constant BITPOS_AUX = 192;

    // Mask of all 256 bits in packed address data except the 64 bits for `aux`.
    uint256 private constant BITMASK_AUX_COMPLEMENT = (1 << 192) - 1;

    // The bit position of `startTimestamp` in packed ownership.
    uint256 private constant BITPOS_START_TIMESTAMP = 160;

    // The bit mask of the `burned` bit in packed ownership.
    uint256 private constant BITMASK_BURNED = 1 << 224;
    
    // The bit position of the `nextInitialized` bit in packed ownership.
    uint256 private constant BITPOS_NEXT_INITIALIZED = 225;

    // The bit mask of the `nextInitialized` bit in packed ownership.
    uint256 private constant BITMASK_NEXT_INITIALIZED = 1 << 225;

    // The tokenId of the next token to be minted.
    uint256 private _currentIndex;

    // The number of tokens burned.
    uint256 private _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned.
    // See `_packedOwnershipOf` implementation for details.
    //
    // Bits Layout:
    // - [0..159]   `addr`
    // - [160..223] `startTimestamp`
    // - [224]      `burned`
    // - [225]      `nextInitialized`
    mapping(uint256 => uint256) private _packedOwnerships;

    // Mapping owner address to address data.
    //
    // Bits Layout:
    // - [0..63]    `balance`
    // - [64..127]  `numberMinted`
    // - [128..191] `numberBurned`
    // - [192..255] `aux`
    mapping(address => uint256) private _packedAddressData;

    // Mapping from token ID to approved address.
    mapping(uint256 => address) private _tokenApprovals;

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

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _currentIndex = _startTokenId();
    }

    /**
     * @dev Returns the starting token ID. 
     * To change the starting token ID, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Returns the next token ID to be minted.
     */
    function _nextTokenId() internal view returns (uint256) {
        return _currentIndex;
    }

    /**
     * @dev Returns the total number of tokens in existence.
     * Burned tokens will reduce the count. 
     * To get the total number of tokens minted, please see `_totalMinted`.
     */
    function totalSupply() public view override returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than `_currentIndex - _startTokenId()` times.
        unchecked {
            return _currentIndex - _burnCounter - _startTokenId();
        }
    }

    /**
     * @dev Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view returns (uint256) {
        // Counter underflow is impossible as _currentIndex does not decrement,
        // and it is initialized to `_startTokenId()`
        unchecked {
            return _currentIndex - _startTokenId();
        }
    }

    /**
     * @dev Returns the total number of tokens burned.
     */
    function _totalBurned() internal view returns (uint256) {
        return _burnCounter;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        // The interface IDs are constants representing the first 4 bytes of the XOR of
        // all function selectors in the interface. See: https://eips.ethereum.org/EIPS/eip-165
        // e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`
        return
            interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.
            interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.
            interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return _packedAddressData[owner] & BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return (_packedAddressData[owner] >> BITPOS_NUMBER_MINTED) & BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        return (_packedAddressData[owner] >> BITPOS_NUMBER_BURNED) & BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        return uint64(_packedAddressData[owner] >> BITPOS_AUX);
    }

    /**
     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal {
        uint256 packed = _packedAddressData[owner];
        uint256 auxCasted;
        assembly { // Cast aux without masking.
            auxCasted := aux
        }
        packed = (packed & BITMASK_AUX_COMPLEMENT) | (auxCasted << BITPOS_AUX);
        _packedAddressData[owner] = packed;
    }

    /**
     * Returns the packed ownership data of `tokenId`.
     */
    function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) {
        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr)
                if (curr < _currentIndex) {
                    uint256 packed = _packedOwnerships[curr];
                    // If not burned.
                    if (packed & BITMASK_BURNED == 0) {
                        // Invariant:
                        // There will always be an ownership that has an address and is not burned
                        // before an ownership that does not have an address and is not burned.
                        // Hence, curr will not underflow.
                        //
                        // We can directly compare the packed value.
                        // If the address is zero, packed is zero.
                        while (packed == 0) {
                            packed = _packedOwnerships[--curr];
                        }
                        return packed;
                    }
                }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * Returns the unpacked `TokenOwnership` struct from `packed`.
     */
    function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) {
        ownership.addr = address(uint160(packed));
        ownership.startTimestamp = uint64(packed >> BITPOS_START_TIMESTAMP);
        ownership.burned = packed & BITMASK_BURNED != 0;
    }

    /**
     * Returns the unpacked `TokenOwnership` struct at `index`.
     */
    function _ownershipAt(uint256 index) internal view returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnerships[index]);
    }

    /**
     * @dev Initializes the ownership slot minted at `index` for efficiency purposes.
     */
    function _initializeOwnershipAt(uint256 index) internal {
        if (_packedOwnerships[index] == 0) {
            _packedOwnerships[index] = _packedOwnershipOf(index);
        }
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnershipOf(tokenId));
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return address(uint160(_packedOwnershipOf(tokenId)));
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, _toString(tokenId))) : '';
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return '';
    }

    /**
     * @dev Casts the address to uint256 without masking.
     */
    function _addressToUint256(address value) private pure returns (uint256 result) {
        assembly {
            result := value
        }
    }

    /**
     * @dev Casts the boolean to uint256 without branching.
     */
    function _boolToUint256(bool value) private pure returns (uint256 result) {
        assembly {
            result := value
        }
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public override {
        address owner = address(uint160(_packedOwnershipOf(tokenId)));
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSenderERC721A() != owner)
            if (!isApprovedForAll(owner, _msgSenderERC721A())) {
                revert ApprovalCallerNotOwnerNorApproved();
            }

        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        if (operator == _msgSenderERC721A()) revert ApproveToCaller();

        _operatorApprovals[_msgSenderERC721A()][operator] = approved;
        emit ApprovalForAll(_msgSenderERC721A(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        _transfer(from, to, tokenId);
        if (to.code.length != 0)
            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
                revert TransferToNonERC721ReceiverImplementer();
            }
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return
            _startTokenId() <= tokenId &&
            tokenId < _currentIndex && // If within bounds,
            _packedOwnerships[tokenId] & BITMASK_BURNED == 0; // and not burned.
    }

    /**
     * @dev Equivalent to `_safeMint(to, quantity, '')`.
     */
    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, '');
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement
     *   {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the balance and number minted.
            _packedAddressData[to] += quantity * ((1 << BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] =
                _addressToUint256(to) |
                (block.timestamp << BITPOS_START_TIMESTAMP) |
                (_boolToUint256(quantity == 1) << BITPOS_NEXT_INITIALIZED);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            if (to.code.length != 0) {
                do {
                    emit Transfer(address(0), to, updatedIndex);
                    if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (updatedIndex < end);
                // Reentrancy protection
                if (_currentIndex != startTokenId) revert();
            } else {
                do {
                    emit Transfer(address(0), to, updatedIndex++);
                } while (updatedIndex < end);
            }
            _currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 quantity) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the balance and number minted.
            _packedAddressData[to] += quantity * ((1 << BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] =
                _addressToUint256(to) |
                (block.timestamp << BITPOS_START_TIMESTAMP) |
                (_boolToUint256(quantity == 1) << BITPOS_NEXT_INITIALIZED);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            do {
                emit Transfer(address(0), to, updatedIndex++);
            } while (updatedIndex < end);

            _currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) private {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

        if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();

        bool isApprovedOrOwner = (_msgSenderERC721A() == from ||
            isApprovedForAll(from, _msgSenderERC721A()) ||
            getApproved(tokenId) == _msgSenderERC721A());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner.
        delete _tokenApprovals[tokenId];

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            // We can directly increment and decrement the balances.
            --_packedAddressData[from]; // Updates: `balance -= 1`.
            ++_packedAddressData[to]; // Updates: `balance += 1`.

            // Updates:
            // - `address` to the next owner.
            // - `startTimestamp` to the timestamp of transfering.
            // - `burned` to `false`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] =
                _addressToUint256(to) |
                (block.timestamp << BITPOS_START_TIMESTAMP) |
                BITMASK_NEXT_INITIALIZED;

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Equivalent to `_burn(tokenId, false)`.
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

        address from = address(uint160(prevOwnershipPacked));

        if (approvalCheck) {
            bool isApprovedOrOwner = (_msgSenderERC721A() == from ||
                isApprovedForAll(from, _msgSenderERC721A()) ||
                getApproved(tokenId) == _msgSenderERC721A());

            if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner.
        delete _tokenApprovals[tokenId];

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            // Updates:
            // - `balance -= 1`.
            // - `numberBurned += 1`.
            //
            // We can directly decrement the balance, and increment the number burned.
            // This is equivalent to `packed -= 1; packed += 1 << BITPOS_NUMBER_BURNED;`.
            _packedAddressData[from] += (1 << BITPOS_NUMBER_BURNED) - 1;

            // Updates:
            // - `address` to the last owner.
            // - `startTimestamp` to the timestamp of burning.
            // - `burned` to `true`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] =
                _addressToUint256(from) |
                (block.timestamp << BITPOS_START_TIMESTAMP) |
                BITMASK_BURNED | 
                BITMASK_NEXT_INITIALIZED;

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked {
            _burnCounter++;
        }
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns (
            bytes4 retval
        ) {
            return retval == ERC721A__IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     * And also called after one token has been burned.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Returns the message sender (defaults to `msg.sender`).
     *
     * If you are writing GSN compatible contracts, you need to override this function.
     */
    function _msgSenderERC721A() internal view virtual returns (address) {
        return msg.sender;
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function _toString(uint256 value) internal pure returns (string memory ptr) {
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit), 
            // but we allocate 128 bytes to keep the free memory pointer 32-byte word aliged.
            // We will need 1 32-byte word to store the length, 
            // and 3 32-byte words to store a maximum of 78 digits. Total: 32 + 3 * 32 = 128.
            ptr := add(mload(0x40), 128)
            // Update the free memory pointer to allocate.
            mstore(0x40, ptr)

            // Cache the end of the memory to calculate the length later.
            let end := ptr

            // We write the string from the rightmost digit to the leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            // Costs a bit more than early returning for the zero case,
            // but cheaper in terms of deployment and overall runtime costs.
            for { 
                // Initialize and perform the first pass without check.
                let temp := value
                // Move the pointer 1 byte leftwards to point to an empty character slot.
                ptr := sub(ptr, 1)
                // Write the character to the pointer. 48 is the ASCII index of '0'.
                mstore8(ptr, add(48, mod(temp, 10)))
                temp := div(temp, 10)
            } temp { 
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
            } { // Body of the for loop.
                ptr := sub(ptr, 1)
                mstore8(ptr, add(48, mod(temp, 10)))
            }
            
            let length := sub(end, ptr)
            // Move the pointer 32 bytes leftwards to make room for the length.
            ptr := sub(ptr, 32)
            // Store the length.
            mstore(ptr, length)
        }
    }
}

// File: contracts/Mettimoto.sol

    // ████████████████████████████████████████████████████████████████████████████████
    // ██████╚▀█████╩╙▀▀▀▀▀╙▀█▀▀▀▀▀▀╝╝τ7╙╙▀▀╩└└╚╝▀▀▀▀████▀█▀▀▀█████╚╚▀███▀▀██▀▀▀▀╝▀█╣██
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    // ███▌╚╬╬╠╬╬╠╠╠╠╠╠╠╣╣╣╣╣╬╠╠╬╣╬╣╬╣╣╬╬╬╬╬╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╣╬╠╬╬╬╠╠╠╠╠╠║╣╣╣╣╣╬╣╣╣▒████
    // ███▌╣╬╬╬╬╠╠╠╠╣╣╣╣╣╠╠╠╠╬╣╠╝▒╣╣╣╝╣╬▒▒╩╠╠╩╬╠╠╬╠╬╠╠╠╠╠╝╝╠╣╩╚╠╣╬╠╠╠╠╣╠╠╠╠╬╬╣╣╣╣╣░;███
    // ███░▓▒╣╣╠╬╬╣╣╠╠╠╠╠╠╠╠╠╣▒▒╣╣▒▒╬▒╬╠╠╠▒╠╬▒φ╠φ╠╬╬φ╣▒▒φ▒╬╣╬╠╬╬╠╠╠╠╠╠╠╠╠╠╬╬╬╣╣╣╣╣▒▄███
    // ███╙▓╬╠╠╠╠╠╠╠╠╠╠╠╠╣╣╣╣╣╣╬╠╠╠╠╠╠╠╠╠╠╠╠╩╠║╠╠╠╠╬╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╣╣╣╬╠╠╠╠╠╣╣╣╣'████
    // ███▌▓╬╬╠╠║╬╠╠╠╠╬╠╬╬╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╬░╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╠╬╬╣╣╠╬╣╠╠╠╠╠╣╠╠╠╠╠╠▒║███
    // ███▌▀▓╚╝╩╣╣╬╬╠▒╚╚║╠╠╠╬╙╚╝╝╝╜╙╚╚╙╣╠╬╚╠╬╬╬╠╠╩╠╠╠╠╬╣╣╣╣▓▓╣▀▀╣╣╣╬╬╬╣╠╣╣╣╣╣╣╣╝╣╣╣]╠██
    // ████████████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓███▄▄▄▄▄▄█▓▄▒╠╠▒QQQ▄Q▄▄▄▄▄▓▓██▄▄▄▄▄▄▄▄▄╗╗╗@▒▒▄▓██
    // ████████████████████████████████████████████████████████████████████████████████

// Mettimoto is a contemporary art NFT collection from Pumpametti, paying homage to Satoshi Nakamoto and Rare Pepes.
// 1000 free mint, mint from contract, 1 mint per wallet.
// To mint, go to "Write Contract" on ethersacn, use the "3. mint" function, input 0 at mint, 1 at numberOfTokens (uint256). 
// Website: https://www.pumpametti.com/mettimoto
// Twitter: https://twitter.com/pumpametti
// Art lives forever, stays on your mind no matter the location.


pragma solidity >=0.8.9 <0.9.0;





pragma solidity ^0.8.0;
contract Mettimoto is Ownable, ERC721A, ReentrancyGuard {
    using SafeMath for uint256;
   
    bool private _isActive = false;

    uint256 public constant MAX_SUPPLY = 1000;

    uint256 public maxCountPerAccount = 1; 
    
    uint256 public price = 0 ether;

    string private _tokenBaseURI = "";

    mapping(address => uint256) public minted;

    modifier onlyActive() {
        require(_isActive && totalSupply() < MAX_SUPPLY, 'not active');
        _;
    }

    constructor() ERC721A("Mettimoto", "Mettimoto") {
    }

    function mint(uint256 numberOfTokens) external payable onlyActive nonReentrant() {
        require(numberOfTokens > 0, "zero count");
        require(numberOfTokens <= MAX_SUPPLY.sub(totalSupply()), "not enough nfts");
        require(numberOfTokens.add(minted[msg.sender]) <= maxCountPerAccount, "already max minted");
        
        minted[msg.sender] = minted[msg.sender].add(numberOfTokens);

        _safeMint(msg.sender, numberOfTokens);
    }

    function _baseURI() internal view override returns (string memory) {
        return _tokenBaseURI;
    }

    function tokenURI(uint256 tokenId) public view override(ERC721A) returns (string memory)
    {
        return super.tokenURI(tokenId);
    }

    
    /////////////////////////////////////////////////////////////
    //////////////////   Admin Functions ////////////////////////
    /////////////////////////////////////////////////////////////
    function startSale() external onlyOwner {
        _isActive = true;
    }

    function endSale() external onlyOwner {
        _isActive = false;
    }

    function setPrice(uint256 _price) external onlyOwner {
        price = _price;
    }

    function setMaxMintPerAddr(uint256 _count) external onlyOwner {
        maxCountPerAccount = _count;
    }

    function setTokenBaseURI(string memory URI) external onlyOwner {
        _tokenBaseURI = URI;
    }

    function withdraw() public onlyOwner nonReentrant {
  
    (bool os, ) = payable(owner()).call{value: address(this).balance}('');
    require(os);
  }

    receive() external payable {}
}

Contract Security Audit

Contract ABI

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Swarm Source

ipfs://e8393f8fd03b2305272bb70416b5dc88dc1c7db1a798a4e528d2b02016a4d0c9
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.