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ERC-721
Overview
Max Total Supply
0 BASEFEE
Holders
48
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
1 BASEFEELoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
BASEFEE
Compiler Version
v0.8.7+commit.e28d00a7
Optimization Enabled:
Yes with 300 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @title: Basefee /// @author: manifold.xyz import "./ERC721Creator.sol"; //////////////////////////////////////////////////////////////////////////////////////////////////////////////// // // // // // .................................................................................................... // // .................................................................................................... // // .................................................................................................... // // ........................................;++*!!????????!!**+;;....................................... // // .................................;+*?%$&&0101010101010101010&@$?*+;................................. // // .............................;*?$&10101010101010101010101010101010&@?*;............................. // // ..........................+!$&10101010101010101010101010101010101010101@?+;......................... // // .......................+?@010101010101010101010101010101010101010101010101&%+....................... // // ....................;*$0101010101010101010101&&&@@@@&&&0101010101010101010101@?;.................... // // ..................;?&0101010101010101&@%?!*+;;.........;;+*?%@&0101010101010101&%+.................. // // ................;?&01010101010101@%!+;.....*????????????!.....;+*%@010101010101010%+................ // // ...............!&1010101010101$!+..........@0101010101010;.........;*%&1010101010101%;.............. // // .............+@010101010101@!;.............$0101010101010;............;*$101010101010&!............. // // ............?101010101010%+................$1010101010101;...............;?&01010101010$;........... // // ..........;$10101010101%+..................$0101010101010;.................;!&1010101010&*.......... // // .........+&1010101010$+....................$1010101010101;...................;?01010101010!......... // // ........*&101010101&*......................$0101010101010;.....................+$1010101010?........ // // .......*1010101010$;.......................$1010101010101;.......................?0101010101?....... // // ......+&010101010?.........................$1010101010101;........................*&010101010!...... // // .....;@101010101!..........................$0101010101010;.........................+&101010101*..... // // .....%010101010!...........................$1010101010101;..........................+&01010101&;.... // // ....*010101010%............................$1010101010101;...........................*010101010?.... // // ....@10101010@;............................$1010101010101;............................%010101010+... // // ...*101010101*.............................$0101010101010;............................;&10101010%... // // ...$10101010$..............................$101010101010&;.............................!10101010&;.. // // ..;&10101010*..+***************************@1010101010101!***************************..;&01010101*.. // // ..+01010101&;..%01010101010101010101010101010101010101010101010101010101010101010101&...$01010101?.. // // ..!01010101@...%01010101010101010101010101010101010101010101010101010101010101010101@...?01010101$.. // // ..?01010101%...%01010101010101010101010101010101010101010101010101010101010101010101@...*01010101@.. // // ..?01010101%...%01010101010101010101010101010101010101010101010101010101010101010101@...*01010101@.. // // ..?01010101%...%01010101010101010101010101010101010101010101010101010101010101010101@...!01010101@.. // // ..!01010101@...%01010101010101010101010101010101010101010101010101010101010101010101@...?01010101$.. // // ..+01010101&;..%01010101010101010101010101010101010101010101010101010101010101010101@...$01010101?.. // // ..;&01010101!..;+++++++++++++++++++++++++++@0101010101010*+++++++++++++++++++++++++++..;101010101*.. // // ...%01010101@..............................$0101010101010;.............................?10101010&;.. // // ...*101010101*.............................$0101010101010;............................;&10101010?... // // ....$10101010&;............................$1010101010101;............................%01010101&;... // // ....+010101010%............................$1010101010101;...........................!010101010?.... // // .....?101010101?...........................$0101010101010;..........................*101010101@;.... // // .....;@010101010?..........................$1010101010101;.........................*0101010101+..... // // ......;&010101010%;........................$1010101010101;........................!0101010101*...... // // .......+&010101010@+.......................$1010101010101;......................;%0101010101!....... // // ........+&010101010&!......................$1010101010101;.....................*@0101010101!........ // // .........+@0101010101@*....................$0101010101010;...................;%10101010101*......... // // ..........;%01010101010$+..................$1010101010101;.................;?&0101010101@+.......... // // ............!&01010101010$*;...............$1010101010101;...............+%&01010101010%;........... // // .............+$101010101010&?+.............$1010101010101;............;!@010101010101@*............. // // ...............*@0101010101010@?*;.........@1010101010101;........;+?$0101010101010&?;.............. // // ................;!@10101010101010&$?*+;....+!*!!!!!!!!!**.....;*!$&10101010101010&?;................ // // ..................;!@10101010101010101&$%?!*+;;;....;;;++*?%$@01010101010101010&?;.................. // // .....................*%&10101010101010101010101&&&&&&010101010101010101010101$!;.................... // // .......................;!$&01010101010101010101010101010101010101010101010@?+....................... // // ..........................;*%@1010101010101010101010101010101010101010&$!+.......................... // // ..............................+!%@&1010101010101010101010101010101@$!+;............................. // // ..................................;+!?%@&&0101010101010101&&@$%!*;.................................. // // .........................................;++**!!!!!!!!**++;;........................................ // // .................................................................................................... // // .................................................................................................... // // .................................................................................................... // // // // // //////////////////////////////////////////////////////////////////////////////////////////////////////////////// contract BASEFEE is ERC721Creator { constructor() ERC721Creator("Basefee", "BASEFEE") {} }
// 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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (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 overridden 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 internal 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 overridden should call `super._beforeFallback()`. */ function _beforeFallback() internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (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) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } }
{ "optimizer": { "enabled": true, "runs": 300 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"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"}]
Contract Creation Code
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Deployed Bytecode
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