Contract Name:
ClaimedUpgradable
Contract Source Code:
// SPDX-License-Identifier: CLOSED - Pending Licensing Audit
pragma solidity ^0.8.4;
import "./IERC721.sol";
import "./ReentrancyGuardUpgradable.sol";
import "./HasRegistration.sol";
contract ClaimedUpgradable is ReentrancyGuardUpgradable, HasRegistration {
bool canClaim;
mapping(address => bytes32) LegacyClaims;
mapping(address => bytes32) LegacyClaimsBy;
mapping(address => mapping(uint => address)) Claims;
mapping(address => uint256[]) ClaimsFor;
address[] BurnAddresses;
function initialize() public initializer {
__Ownable_init();
ReentrancyGuardUpgradable.init();
canClaim = true;
BurnAddresses.push(address(0));
BurnAddresses.push(0x5D152dd902CC9198B97E5b6Cf5fc23a8e4330180);
}
function version() public pure returns (uint256) {
return 3;
}
function isBurnAddress(address needle) public view returns (bool) {
address[] memory burnAddresses = getBurnAddresses();
for (uint i=0; i < burnAddresses.length; i++) {
if (burnAddresses[i] == needle) {
return true;
}
}
return false;
}
function toggleCanClaim() public onlyOwner {
canClaim = !canClaim;
}
function claim(address nftAddress, uint tokenId, address _claimedBy) public nonReentrant isRegisteredContract(_msgSender()) {
if (canClaim) {
addToClaims(nftAddress, tokenId, _claimedBy);
} else {
revert("Claiming is turned off");
}
}
function isClaimed(address nftAddress, uint tokenId, bytes32[] calldata proof ) public view returns(bool) {
bytes32 _hash = keccak256(abi.encodePacked(tokenId));
IERC721 token = IERC721(nftAddress);
if (proof.length == 0) {
bool claimed = getClaims(nftAddress, tokenId) != address(0);
bool addressClaimed = false;
try token.ownerOf(tokenId) returns (address _owner) {
if (isBurnAddress(_owner)) {
addressClaimed = true;
}
} catch {}
return addressClaimed || claimed;
} else {
bytes32 root = getLegacyClaims(nftAddress);
return verifyScript(root, _hash, proof);
}
}
function getClaimsFor(address _owner) public view returns (uint256[] memory) {
return ClaimsFor[_owner];
}
function getLegacyClaims(address nftAddress) public view returns(bytes32) {
return LegacyClaims[nftAddress];
}
function claimedBy(address nftAddress, uint tokenId) public view returns (address _owner, string memory _type) {
address claimed = getClaims(nftAddress, tokenId);
if (claimed != address(0)) {
return (claimed, "record");
} else {
return (address(0), "unknown");
}
}
function legacyClaimedBy(address nftAddress, address claimant, uint tokenId, bytes32[] calldata proof) public view returns (address _owner, string memory _type) {
bytes32 root = getLegacyClaimsBy(nftAddress);
bytes32 _hash = keccak256(abi.encodePacked(claimant, tokenId));
require(verifyScript(root, _hash, proof), "invalid proof");
return (claimant, 'legacy');
}
function addLegacy(address nftAddress, bytes32 root) onlyOwner public {
LegacyClaims[nftAddress] = root;
}
function addLegacyClaimedBy(address nftAddress, bytes32 root) onlyOwner public {
LegacyClaimsBy[nftAddress] = root;
}
function getBurnAddresses() internal view returns (address[] memory){
return BurnAddresses;
}
function getLegacyClaimsBy(address nftAddress) internal view returns(bytes32) {
return LegacyClaimsBy[nftAddress];
}
function getClaims(address nftAddress, uint tokenId) internal view returns (address) {
return Claims[nftAddress][tokenId];
}
function addToBurnAddresses(address burnAddress) internal onlyOwner {
BurnAddresses.push(burnAddress);
}
function addToClaims(address nftAddress, uint tokenId, address _owner) internal {
Claims[nftAddress][tokenId] = _owner;
ClaimsFor[_owner].push(tokenId);
}
function verifyScript(bytes32 root, bytes32 _hash, bytes32[] calldata proof) public pure returns (bool) {
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (_hash <= proofElement) {
_hash = optihash(_hash, proofElement);
} else {
_hash = optihash(proofElement, _hash);
}
}
return _hash == root;
}
// memory optimization from: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3039
function optihash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
interface IERC721 {
function burn(uint256 tokenId) external;
function transferFrom(address from, address to, uint256 tokenId) external;
function mint( address _to, uint256 _tokenId, string calldata _uri, string calldata _payload) external;
function changeName(string calldata name, string calldata symbol) external;
function updateTokenUri(uint256 _tokenId,string memory _uri) external;
function tokenPayload(uint256 _tokenId) external view returns (string memory);
function ownerOf(uint256 _tokenId) external view returns (address _owner);
function getApproved(uint256 _tokenId) external returns (address);
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external;
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes calldata data) external;
function totalSupply() external view returns (uint256);
function tokenOfOwnerByIndex(address _owner, uint256 _index) external view returns (uint256);
function tokenByIndex(uint256 _index) external view returns (uint256);
function balanceOf(address account, uint256 id) external view returns (uint256);
function isApprovedForAll(address _owner, address _operator) external view returns (bool);
function setApprovalForAll( address _operator, bool _approved) external;
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: CLOSED - Pending Licensing Audit
pragma solidity ^0.8.4;
/**
* @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].
*/
contract ReentrancyGuardUpgradable {
// 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 _NOT_ENTERED;
uint256 private _ENTERED;
uint256 private _status;
function init() internal {
_NOT_ENTERED = 1;
_ENTERED = 2;
_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 make 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;
}
}
// SPDX-License-Identifier: CLOSED - Pending Licensing Audit
pragma solidity ^0.8.4;
import "./IsBypassable.sol";
contract HasRegistration is IsBypassable {
mapping(address => uint256) public registeredContracts; // 0 EMPTY, 1 ERC1155, 2 ERC721, 3 HANDLER, 4 ERC20, 5 BALANCE, 6 CLAIM, 7 UNKNOWN, 8 FACTORY, 9 STAKING, 10 BYPASS
mapping(uint256 => address[]) internal registeredOfType;
modifier isRegisteredContract(address _contract) {
require(registeredContracts[_contract] > 0, "Contract is not registered");
_;
}
modifier isRegisteredContractOrOwner(address _contract) {
require(registeredContracts[_contract] > 0 || owner() == _msgSender(), "Contract is not registered nor Owner");
_;
}
function registerContract(address _contract, uint _type) public isRegisteredContractOrOwner(_msgSender()) {
registeredContracts[_contract] = _type;
registeredOfType[_type].push(_contract);
}
function unregisterContract(address _contract, uint256 index) public onlyOwner isRegisteredContract(_contract) {
address[] storage arr = registeredOfType[registeredContracts[_contract]];
arr[index] = arr[arr.length - 1];
arr.pop();
delete registeredContracts[_contract];
}
function isRegistered(address _contract, uint256 _type) public view returns (bool) {
return registeredContracts[_contract] == _type;
}
function getAllRegisteredContractsOfType(uint256 _type) public view returns (address[] memory) {
return registeredOfType[_type];
}
}
// SPDX-License-Identifier: CLOSED - Pending Licensing Audit
pragma solidity ^0.8.4;
import "./IsClaimable.sol";
abstract contract IsBypassable is IsClaimable {
bool byPassable;
mapping(address => mapping(bytes4 => bool)) byPassableFunction;
mapping(address => mapping(uint256 => bool)) byPassableIds;
modifier onlyOwner virtual override {
bool _canBypass = byPassable && byPassableFunction[_msgSender()][msg.sig];
require(owner() == _msgSender() || _canBypass, "Not owner or able to bypass");
_;
}
modifier onlyOwnerOrBypassWithId(uint256 id) {
require (owner() == _msgSender() || (id != 0 && byPassableIds[_msgSender()][id] ), "Invalid id");
_;
}
function canBypass() internal view returns(bool) {
return (byPassable && byPassableFunction[_msgSender()][msg.sig]);
}
function canBypassForTokenId(uint256 id) internal view returns(bool) {
return (byPassable && canBypass() && byPassableIds[_msgSender()][id]);
}
function toggleBypassability() public onlyOwner {
byPassable = !byPassable;
}
function addBypassRule(address who, bytes4 functionSig, uint256 id) public onlyOwner {
byPassableFunction[who][functionSig] = true;
if (id != 0) {
byPassableIds[who][id] = true;
}
}
function removeBypassRule(address who, bytes4 functionSig, uint256 id) public onlyOwner {
byPassableFunction[who][functionSig] = false;
if (id !=0) {
byPassableIds[who][id] = true;
}
}
}
// SPDX-License-Identifier: CLOSED - Pending Licensing Audit
pragma solidity ^0.8.4;
import "./OwnableUpgradeable.sol";
abstract contract IsClaimable is OwnableUpgradeable {
bool public isClaimable;
function toggleClaimable() public onlyOwner {
isClaimable = !isClaimable;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_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() virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @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 ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
* @custom:oz-retyped-from bool
*/
uint8 private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint8 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
*/
modifier initializer() {
bool isTopLevelCall = !_initializing;
require(
(isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
"Initializable: contract is already initialized"
);
_initialized = 1;
if (isTopLevelCall) {
_initializing = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
* initialization step. This is essential to configure modules that are added through upgrades and that require
* initialization.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*/
modifier reinitializer(uint8 version) {
require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
_initialized = version;
_initializing = true;
_;
_initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*/
function _disableInitializers() internal virtual {
require(!_initializing, "Initializable: contract is initializing");
if (_initialized < type(uint8).max) {
_initialized = type(uint8).max;
emit Initialized(type(uint8).max);
}
}
}
// 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 AddressUpgradeable {
/**
* @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 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);
}
}
}
}