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Contract

0x9c654Cc6dAbC1DCe4e35A8bD66B7f689A319817E
 

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Mint Base193934172024-03-08 22:34:59343 days ago1709937299IN
0x9c654Cc6...9A319817E
0 ETH0.0088487550
Mint Base187175612023-12-05 3:47:11438 days ago1701748031IN
0x9c654Cc6...9A319817E
0 ETH0.0072715441.08798641
Mint Base177356462023-07-20 16:44:23575 days ago1689871463IN
0x9c654Cc6...9A319817E
0 ETH0.0076802343.39726797
Safe Transfer Fr...159015142022-11-05 4:45:11833 days ago1667623511IN
0x9c654Cc6...9A319817E
0 ETH0.0043530214
Mint Base159014492022-11-05 4:32:11833 days ago1667622731IN
0x9c654Cc6...9A319817E
0 ETH0.0024870814.05330353
Safe Transfer Fr...157010762022-10-08 4:47:23861 days ago1665204443IN
0x9c654Cc6...9A319817E
0 ETH0.00041395.9236771
Set Token URI157010292022-10-08 4:37:47861 days ago1665203867IN
0x9c654Cc6...9A319817E
0 ETH0.000355027.844998
Set Token URI153089372022-08-09 16:00:21920 days ago1660060821IN
0x9c654Cc6...9A319817E
0 ETH0.0011227624.80973832
Set Token URI153088792022-08-09 15:46:01920 days ago1660059961IN
0x9c654Cc6...9A319817E
0 ETH0.0007844217.33351034
Set Token URI153088712022-08-09 15:43:46920 days ago1660059826IN
0x9c654Cc6...9A319817E
0 ETH0.0007327516.19174971
Set Token URI153088592022-08-09 15:41:22920 days ago1660059682IN
0x9c654Cc6...9A319817E
0 ETH0.000681215.05264509
Safe Transfer Fr...153048572022-08-09 0:38:33921 days ago1660005513IN
0x9c654Cc6...9A319817E
0 ETH0.0016115521.58147701
Set Approval For...153039642022-08-08 21:19:04921 days ago1659993544IN
0x9c654Cc6...9A319817E
0 ETH0.0011325922.14818727
Mint Base153039182022-08-08 21:08:56921 days ago1659992936IN
0x9c654Cc6...9A319817E
0 ETH0.0035218319.90016945
Set Approval For...145335512022-04-06 17:08:361045 days ago1649264916IN
0x9c654Cc6...9A319817E
0 ETH0.0045180188.35121512
Mint Base145281422022-04-05 20:40:231046 days ago1649191223IN
0x9c654Cc6...9A319817E
0 ETH0.0103568958.52177386
Mint Base145274672022-04-05 18:07:141046 days ago1649182034IN
0x9c654Cc6...9A319817E
0 ETH0.0126349577.81340722
Set Token URI144192872022-03-19 21:24:141063 days ago1647725054IN
0x9c654Cc6...9A319817E
0 ETH0.001746944.05261933
Mint Base144121292022-03-18 18:45:071064 days ago1647629107IN
0x9c654Cc6...9A319817E
0 ETH0.0101829656.73751733
Set Approval For...142903882022-02-27 20:26:111083 days ago1645993571IN
0x9c654Cc6...9A319817E
0 ETH0.0026451651.72704616
Mint Base142901182022-02-27 19:28:061083 days ago1645990086IN
0x9c654Cc6...9A319817E
0 ETH0.0108502550.70804961
Approve Admin142900442022-02-27 19:12:171083 days ago1645989137IN
0x9c654Cc6...9A319817E
0 ETH0.0032751633.60864051
Set Royalties142900382022-02-27 19:11:291083 days ago1645989089IN
0x9c654Cc6...9A319817E
0 ETH0.0044275136.1223181

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Contract Source Code Verified (Exact Match)

Contract Name:
SKLLCRWN

Compiler Version
v0.8.7+commit.e28d00a7

Optimization Enabled:
Yes with 300 runs

Other Settings:
default evmVersion
File 1 of 5 : SKLLCRWN.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Skull Study The Crown Series
/// @author: manifold.xyz

import "./ERC721Creator.sol";

////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                            //
//                                                                                            //
//                                                                                            //
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//        ▀▀▀▀▀▀░╢╢▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒░░░░░░╟░▓▌╜░░▌░░░░▒▒▒▒╜▒╜╜─HmHHHMH╗╖╖╖╖p▒▒▒▒µp▒░░░    //
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//        ▓▒╢╢▒▒▒▒▒╢▒▒▒▒▒▒▀▀▀██████▀▀▀▀▀▀▒╢▒▒▒▌╓▓▓,║/║▒▒▒ ]▒▒▒▒▒_    _ __░░░░▒▒░░░▒▒░░░░░░    //
//        ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▐█████▒░░░░░▒▓▒▒▒▒░▓║░░▒▒▓▒▒▒▒▒▒▒▒▒_       _   __'░░░░░░░▒░░░    //
//        ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▐█████░░░░░░▒▓▒▒▓▒░▌▐░░░▓▓╜▒▒╟▓╬▓▒▒     ,,,,,,,╓,░▒╜▒▒░░░▒░░░    //
//        ╢▒▒▒▒▒▒╣▒▒▒▒▒▒▒▒▒▒░▐█████░░░░░░▒▓╢▒▓╢░▌▐░░░╠░░░╣╣╢╢╫▓▓   __╫▓▓▓▒▒╢╢╢▒ _ ░░░▒▒░░░    //
//        ╢╣╣▒▒▒▒▒▒▒▒▒▒▒▒▒▒@@▒▀▀▀▀▀░░░░░░▒▐▒▒Ñ▒@▌▒▒▒m▒@╗▒▒▒╙╙╙╙░░,.¿░╙╙╜╙╙╢╢╣╢▒╖╖╖▒▒▒▒▒▒▒▒    //
//        ╣╣╢╢▒▒▒▒▒▒▒▒▒▒▒▒╟▓▓▒▒░▒▒▒░▒▒▒▒▒▒▒@╠▒╓╫▓╫▓╫▓╝╝╜▒▒▒░▒▒░░░░░░░░░░░j╣╢╫▓▓▓▓▒▒▒╫▒▒▒▒▒    //
//        ╣▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓╣╬▓╣▒▒▒▒░░▓╣▓▓╣╢╢▓╢▓╢▌░░░░░]▒╢╢╢╣▒▒╢╢╣╣╣╢▒╫╢▓▓▓▓▓▓▓▓▓╫▓▓╣╣@    //
//        ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒╫▓▓▓▓▓W▒æ▒▒╢▓▓╫▓╨╢╣▓╣▓▓╣░╖╖░░]╢╢╢╢╣▒▒╢╢╢▓▓╣╣╣╬▓▓▓▓▓▓▓▓▓▓▓╩╣╫╣    //
//        ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒╢╢▒╫╢╢╢╬╢▓▓▓▓▓▓▒▒▒▒▒▒╢▓╣▓╢╣▒╢▒╢░╟╣╢╢╢╣╢╢╢╣╣░▒▒▒▒░░░░▒▒▒╢╢▒▒▒░╟▓▓    //
//                                                                                            //
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////////////////////////////////////////////////////////////////////////////////////////////////


contract SKLLCRWN is ERC721Creator {
    constructor() ERC721Creator("Skull Study The Crown Series", "SKLLCRWN") {}
}

File 2 of 5 : ERC721Creator.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";

contract ERC721Creator is Proxy {
    
    constructor(string memory name, string memory symbol) {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
        Address.functionDelegateCall(
            0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
            abi.encodeWithSignature("initialize(string,string)", name, symbol)
        );
    }
        
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
     function implementation() public view returns (address) {
        return _implementation();
    }

    function _implementation() internal override view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }    

}

File 3 of 5 : Proxy.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

File 4 of 5 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

File 5 of 5 : StorageSlot.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 300
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Deployed Bytecode

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