ERC-1155
Overview
Max Total Supply
16,136 Free
Holders
8,723
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Free
Compiler Version
v0.8.17+commit.8df45f5f
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: Freeemes /// @author: manifold.xyz import "./manifold/ERC1155Creator.sol"; //////////////////////////////////////////////////////////////////////////////////////////// // // // // // |"¬¬]||b¬jj[¬¬¬]|`b¬jβ [Ξ j]|Ξ ¬,'|L¬]f'¬¬,β '¬,\¬"",,jj|Ξ ¬jj| ¬¬j|Ξ¬ β |[¬¬]β |¬¬¬ // // // // |~ β²|βΏββ ββΏββ ²²~βββ'βΏβ""'βΏ"b""9²""^½²"β^²²"²"'^²`²²^^²²βΏ²²βΏβΏβββ|~β ²|~β~~²βΏβββ // // // // β=ββ]β-ββ ββ=ββββ§β==β<β÷ββΏ<ββ==β§<ββΟβββΏβΏββββββ=β<β÷βββ¥β>ββ<ββ=βββββ ββ-- β--ββ // // // // c[β.«βmmwmβsæµΟ:smuβmq»mΟββ βmmΟæβ€ΞβΟæeΞΞ΅βΟββββΟββæmwΟβemβΟββeeµwee»»wmβΞ±»»mmΞ΅βΟæ // // // // ββββββ |ββββββββ,β,ββββΞ,,,βββββ,βΞβµβββββµβββ,ββ‘,β|β.β‘βΞβΞ£ββββµββββββββββββββββ, // // // // ΞΞ""βΖΞ3β"îβΞΞβ|βΞΞΞ£β"`^"^^ΞΞ^^|""Ξ"Ξ£^Ξ^Lβ^"βΞ£ββ "^|",|lΞΞ"^`^Ξ"β^ΞΞ"ββΞL,β^βΞΞΞ^ // // // // "Ζ"""""""²"βΖ""β ÿ""Ζ"5¬¬"²ΖβΏβΖ"²"Ζ"""²"""²β"Ζ""²²"["²Ζ"²¬jβΏ²5¬¬²""Ζ"""5Ζ""²""²"² // // // // βββββββββββββββββββββββββ**βββMβ*ββ=ββªββββ²==ββββββββββ=ββββ€β=βββββ=βββββββββββ // // // // »«»»«e»»Ο»«eβΟΟ:»βm«m«eβnβ:»Ξ΅n»x»eÑΟ»»Ο«Ξ±Ξ±m»mβΟ«βeββ«xem-Ο⬻»ββ««β₯β₯e««xmm»Ο«»m«x // // // // β Ξβββββββββ ββββ,β Ξβββ,Ξ,β,ββββµββ βββββ β,ββββ βββ(βββµβββ ,Ξβββ,Ξ-,ββ Ξ£ββββ βββββββββ // // // // lβ^ββ"ββββ‘β\Ξβββ βΞ^ββ‘^ΞΞ`ββ‘'β""ββΞβµ`"Ξbβββ"Ξ,ββ(ββ"β `βΞΞβ^"Ξ£βjββΞΞ^β`"ββ"β"ββββ // // // // """"""""""β ["""²""""β"² ""²"²¬"{ßβ©βjβ"²^""²²βΏ²βΏ'²β '²β"²*²"βj²Ξj½Q"²"βΏ"""""²"/""" // // // // ====ββ=β==¥βΏββ₯ββ=ββββ*β÷=βββΏ==ββºMβVβββββ]βΞ¦βββ)ªβββW*VTKMT¥=βVββ===βββ=βββ*`T== // // // // exxxmeΞ±x»xmqm»xmemmΞ±mxmβnmxvmnΟmpNmuβm«Dβmmeβ‘mxβ€βrΞxβββmwxmgβmxβ©βex»xmeΞ±xxxmqmxx // // // // ββββββββββββββββββββββββµββββµβββββββββ ββββββββββ βββ₯ββββββββ β ββββ βββββββββββββββ // // // // ΞββÜβΞββÜβββββββ‘Ö|βββ‘β Ξ£Ξ`ββ‘"Ξ£`ÜΞQΞβ\βΞÖβββ,βββ^βÖΞ|ÜβΞΞ,ΞÜβÖΞ£βÜβΞ£βββββββββββββββ // // // // βΖ"""""""""""""'¬¬ñ"β"""¬'j²Ζ"βj¬ß"jβΖß"jβΖ""""β‘j¬"²j¬jΖ²"βj²Ζ""jj²¬¬β"""""""""" // // // // *βΏβΏβ**βΏβΏβΏ**βΏβΏβΏβΏ**÷βΏβΏ*βΏ*÷Vβ§yβΏβββ¨β΄*ββ΄Ξ¦ββ΄β¨βΏβΞ¦β΄β¨βΏβΏβΏ*β<ββ÷βββββββΏββ§βββββ΄βΏβΏ**βΏβΏβΏ**βΏβΏ** // // // // »β»»x»»»»x«»x»«x«βmæmeββ»ββ»β©βÄββΞ±mΟβmÄββΞ¦ββwβ§βββ©mβΞ±β§βββ‘exæ»ββµæxβ⧻»x»»»»x«»β»x // // // // βββββββββββββββββ βββββββµβββ βββββ βββββ βββββββββ βββ ββββΞβββββ Ξβ¬Jββ β ββββββββββββββ // // // // Ξ£ββΞ`Ξ£ββΞβ‘Ξ£βββ|βΞ£βΞ£"β‘β‘Ξ£|`βΞΞβΞβΞ£"βΞ"ββββββ[β ββΞβ‘β β|Ξ£ββΞβJβββ ΞJjββÖββΞ`Ξ£βββ`Ξ£ββββ // // // // """"""Ζ¬Ζ'"""jβ^j¬¬"'"Ζ'""¬"²"jΖ½"β"""öΖβββ‘"Ζ""β Ζ²'""'""""Ζ"Ζ""""""""""""""β |¬"" // // // // ββΏβββββΏβββββΏββ*βª*βββ²*βββΏ²βΏβββªºMβ₯VªªHββ₯βª β²VT*βΏββΏβ*βββββªββVβ=ββ₯=ββªβ₯βββªMβ΄** // // // // apββ«vΞ±x»βmemβ.ββ[βΞ±mxββnΟ:«mnβΞ΅oβ‘βnmβ‘pæΟΟβ‘eΟmΟβ‘«βͺββmββ‘mβββ«βΞ΅β :¡tΞ΅β«¡ΟΞ΅β«:Ξ©nβ // // // // |βββ]β[µβββ[βµ ββΞµΟβββββββββµβββ[β ββ`β€Ξββ€`βββ ββββββΌβββββββββ₯βββββ₯βββββµβ]ββµββ // // // // lΞ£βββ ΞΞ£βββ βΞΞβ,βÅΞβββ‘`Ξ|Üββ‘ββ`βββ`Ξ ,β ΞΞjβ `,lβ‘,Ξ£|`,,Ξβ,βββββÜββββÖββββββββββ‘Ξβ // // // // 7Ζß"j@Ζ5"ñ7[fΞ"j""""j""¬""'"ñ""Ζf ¬ """î j"'^""'""}""]"¬¬¬"β[`¬""3Ζ""""Ζ55j@ΖΖ5ñ // // // // β~βββΏβ²ββββ~ββββΏβΏ~ββββ÷~βββΏ;~^βΏβΏβΏ~βΏ ]²~βΏβΏΞ¦²ββββ+TβΏβββββΏ~ββββ~βββββ~βββΏβ~ββββΏ²βββ // // // // βββββββββ=ββββββ§β§βmmmnmβnβΟeβ‘uΟββ ββ:β mβββ r=βββmβeβ=emeβmvβeΟβββββββββmβmβtβββ // // // // β ΞÖβββΞΞβββΞΞÖβββΞc.ββΞΞβ©ββΞΞβββΌββ- « |βÖΟββ Οβββ€βµββΞΞΞβββ βΞµβββΞÖβββΞββββββββ // // // // [`` ]β[L .β|`` β β`` ββ [``]][[.β`,Ξ£`µ β,`` ββ ,` ββΞ,LJ]|[`.]β[`, β[`` β β[`.]β |` ] // // // // '¬¬j(|"¬¬.'[¬¬¬¬'¬¬¬¬(¬¬^"''`¬" "'¬ "Ζ¬¬ "`"¬¬ "¬`""/'¬¬¬¬'|¬¬¬''¬¬¬"'"¬¬¬'|¬¬¬ // // // // ²βΏβ©βΏ7²*βΏ""²|βΏβ©β²β ~ββj²÷~β.!%βββΏ²² βββΏ²+ββ ²²~βΏ²" [÷β©²²[~ββ²²βΏβΏβΏ²²²βΏ β²+÷βββ²βΏβββ // // // // ¡=β ]¡[Ξ΅β ![¬β© ]¡tΞ΅ ]]t> Ξ±][-Ξ΅βª [=ΟΟ!¡Ξ΅β© β¡tΞ΅ βββ β =)tββ]¡[ββ :¡tβ «¡tΞ΅β]![¬ββ // // // // βeβ-ββββ-βββ₯e--ββββββ¬ββ€ββ-β¬ββ₯- β₯ -βµβ₯β¬β₯wβββ¬βββββββ~Ο ββββ-βββ΄-βββ¬βeβ-βββ₯β--ββ΄eββ // // // // ,Ξ..β ,Ξ,.β,ΞΞ.ββΞΞ,βββ‘,,β.β‘ΞΞ-` Ξ£ΞΞ£βββββββΞ,,β.β‘ββ© β`Ξ,,.ββ‘,,.β,ΞΞ..β,Ξ,.β,ΞΞ,β // // // // ^Ξ""""Ξ""""ΞΞ"""ΞΞ`"""^`"β""" β'ΞΞβjββ‘βββ"β^Ξ`"""^| " "Ξ"""^Ξ"`""ΞΞ""""Ξ""""ΞΞ"" // // // // ²βΏ^^²²βΏβΏ^²²βΏβΏ^²²²βΏ^²βΏ²²~~ ²]βΏβj]²²βΏβΏ]²βΏ[jββ΄βT^²βΏ²W~ββββΏβΏβΏβ²²βΏβΏ^²²²βΏ^²²²βΏ^²βΏ²βΏβΏ^² // // // // =ββ¬==¬ββ==ββββ===ββmββ§ ββ=βmβ¬=<ββ4βββββ4βββββ¬=β⬬= =βββ¬=βββ==ββ¬β=¬ββ¬==βββ // // // // β¬ββββ¬β¬Ξββββ¬ββββ₯β¬β¬ββΟββ€.βββββ₯ββββ¬β¬ββββ¬βΞ£ΞΞβ₯ββ¬βββββΌβ¬βµΞ±β¬-βΞββ¬βΞβββ¬ββ¬ββββ¬β¬Ξββββ¬β¬βββ // // // // βΞ,jβ βΞ,.β,,Ξ,ββ,ΞµβββΞ£ΞβββQΞ,.,,Ξβ β,,Ξ.ββ,Ξ,jβ,,|βββΞΣΣββ,Ξβ.β,,Ξ,jββΞ,JββΞΞJj // // // // "Ξ¬βj|Ξββjβ ΞβββjΞΞβββ5Ξ£[β©"β‘|Ξ¬¬β |Ξβ "|Ξβ¬β"Ξ¬¬βjβ "`β"β "β‘Ξββ,ΖΞÜ"ΖΞβ¬βj"Ξββjβ ΞΞββ // // // // βΏβΏ""²²^^"²²^`"²²²~5²'²5ββΏ"²²`β"²²^βΏ ²²"β^^²²`^²^²\ββΏ"²²βΏβΏβΏj55¬βΏ²²²βΏ""²²`^"²²"`"² // // // // *βββΏβββΏββ=ββΏβββ<=ββ₯ββ<β=Vββ*ββ¬β<ββ¬*<βΏ=β==β>ββ¬βºββ==βββββ<=βββ<ªβββΏβββΏββ==>ββ= // // // // zµβΞ±:»nµq«:sµmΟ«se~Ξ±mβeβββ©βΌ»cmΞ±:βsµβ«:eµβΟ«»nβΞ±β»sræΞ±β»cmq:βsmβ«β»µβΞ±:»ncΞ±«»somΞ± // // // // Åββββββββββ,ββββββ,βββββΞββ‘βΞβββββββββββββ,ββ,β,ββββ,,Ξβββ,βββββββββ,βββββββββ,β // // // // ΞβΞβββ5ββββ"^^ββ‘"LΞïβ"Ξ£|"ββ‘Ξ""^βI5Ξ"βββΞ^jβ "β‘""β Ξ£Ξ^^^Ξ£^|Ξββ"ΞΞΞβΞ£ΞΞβ^βΞ£ββ"^Ξ£Ξβββ // // // // ²²β©βΖβ²²β²T²^²j²²''"β²²β²Ç²²^βjβΏββ"β©²βßΖ"j²"*²²'²²β"²²βΏ²β©βΏ²²βΏ^"²β²²½'²"²βΞ¦β β5βββ // // // // βββββ€Ξ¦β§β§ββββmβββ€ββββ)ββββββββnβββββΟββββeββ€ββββm=ββββ=βββββ§vβ§βnββββMββ§βββββββmββ // // // // PΞ΅ββmβββ₯β₯«β₯β€β€β₯βββ₯Ξββ₯β΄ββ₯β-ββΌββΌβββ¬β[β₯p ββ₯nβ₯βββββΌββΌβ₯β΄βββ΄β¬ββ₯ββ₯Jββ₯ΞββΞe[qββ₯ββββββ₯β₯ββ₯β // // // // ÅΞββ(β βββββΞ,βββ,β,β(βββ`,ββ β,βββ ,β,,ββÜβββββββββΞΞβββ ,Ξββjβ ΞβΞβββ ,βββββββββ β βββ // // // // // //////////////////////////////////////////////////////////////////////////////////////////// contract Free is ERC1155Creator { constructor() ERC1155Creator("Freeemes", "Free") {} }
// 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 ERC1155Creator is Proxy { constructor(string memory name, string memory symbol) { assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1)); StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x6bf5ed59dE0E19999d264746843FF931c0133090; Address.functionDelegateCall( 0x6bf5ed59dE0E19999d264746843FF931c0133090, 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 v4.8.0) (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 functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 } } }
{ "remappings": [ "@openzeppelin/=node_modules/@openzeppelin/" ], "optimizer": { "enabled": true, "runs": 300 }, "metadata": { "bytecodeHash": "ipfs" }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "london", "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"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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