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Contract Source Code Verified (Exact Match)
Contract Name:
SecurityCouncil
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {ISecurityCouncil} from "./interfaces/ISecurityCouncil.sol"; import {IProtocolUpgradeHandler} from "./interfaces/IProtocolUpgradeHandler.sol"; import {Multisig} from "./Multisig.sol"; import {EIP712} from "@openzeppelin/contracts/utils/cryptography/EIP712.sol"; /// @title Security Council /// @author Matter Labs /// @custom:security-contact [email protected] /// @dev The group of security experts who serve as a technical security service for ZKsync protocol. contract SecurityCouncil is ISecurityCouncil, Multisig, EIP712 { /// @notice Address of the contract, which manages protocol upgrades. IProtocolUpgradeHandler public immutable PROTOCOL_UPGRADE_HANDLER; /// @dev EIP-712 TypeHash for protocol upgrades approval by the Security Council. bytes32 internal constant APPROVE_UPGRADE_SECURITY_COUNCIL_TYPEHASH = keccak256("ApproveUpgradeSecurityCouncil(bytes32 id)"); /// @dev EIP-712 TypeHash for soft emergency freeze approval by the Security Council. bytes32 internal constant SOFT_FREEZE_SECURITY_COUNCIL_TYPEHASH = keccak256("SoftFreeze(uint256 nonce,uint256 validUntil)"); /// @dev EIP-712 TypeHash for hard emergency freeze approval by the Security Council. bytes32 internal constant HARD_FREEZE_SECURITY_COUNCIL_TYPEHASH = keccak256("HardFreeze(uint256 nonce,uint256 validUntil)"); /// @dev EIP-712 TypeHash for setting threshold for soft freeze approval by the Security Council. bytes32 internal constant SET_SOFT_FREEZE_THRESHOLD_TYPEHASH = keccak256("SetSoftFreezeThreshold(uint256 threshold,uint256 nonce,uint256 validUntil)"); /// @dev EIP-712 TypeHash for unfreezing the protocol upgrade by the Security Council. bytes32 internal constant UNFREEZE_TYPEHASH = keccak256("Unfreeze(uint256 nonce,uint256 validUntil)"); /// @dev The default threshold for soft freeze initiated by the Security Council. uint256 public constant SOFT_FREEZE_CONSERVATIVE_THRESHOLD = 9; /// @dev The recommended threshold parameter for soft freeze initiated by the Security Council. uint256 public constant RECOMMENDED_SOFT_FREEZE_THRESHOLD = 3; /// @dev The number of signatures needed to trigger hard freeze. uint256 public constant HARD_FREEZE_THRESHOLD = 9; /// @dev The number of signatures needed to approve upgrade. uint256 public constant APPROVE_UPGRADE_SECURITY_COUNCIL_THRESHOLD = 6; /// @dev The number of signatures needed to unfreeze the protocol. uint256 public constant UNFREEZE_THRESHOLD = 9; /// @dev Tracks the unique identifier used in the last successful soft emergency freeze, /// to ensure each request is unique. uint256 public softFreezeNonce; /// @dev Tracks the unique identifier used in the last successful hard emergency freeze, /// to ensure each request is unique. uint256 public hardFreezeNonce; /// @dev Tracks the unique identifier used in the last successful setting of the soft freeze threshold, /// to ensure each request is unique. uint256 public softFreezeThresholdSettingNonce; /// @dev Tracks the unique identifier used in the last successful unfreeze. uint256 public unfreezeNonce; /// @dev Represents the number of signatures needed to trigger soft freeze. /// This value is automatically reset to 9 after each soft freeze, but it can be /// set by the 9 SC members and requires to be not bigger than 9. uint256 public softFreezeThreshold; /// @dev Initializes the Security Council contract with predefined members and setup for EIP-712. /// @param _protocolUpgradeHandler The address of the protocol upgrade handler contract, responsible for executing the upgrades. /// @param _members Array of addresses representing the members of the Security Council. /// Expected to be sorted in ascending order without duplicates. constructor(IProtocolUpgradeHandler _protocolUpgradeHandler, address[] memory _members) Multisig(_members, 9) EIP712("SecurityCouncil", "1") { PROTOCOL_UPGRADE_HANDLER = _protocolUpgradeHandler; require(_members.length == 12, "SecurityCouncil requires exactly 12 members"); softFreezeThreshold = RECOMMENDED_SOFT_FREEZE_THRESHOLD; } /// @notice Approves ZKsync protocol upgrade, by the 6 out of 12 Security Council approvals. /// @param _id Unique identifier of the upgrade proposal to be approved. /// @param _signers An array of signers associated with the signatures. /// @param _signatures An array of signatures from council members approving the upgrade. function approveUpgradeSecurityCouncil(bytes32 _id, address[] calldata _signers, bytes[] calldata _signatures) external { bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(APPROVE_UPGRADE_SECURITY_COUNCIL_TYPEHASH, _id))); checkSignatures(digest, _signers, _signatures, APPROVE_UPGRADE_SECURITY_COUNCIL_THRESHOLD); PROTOCOL_UPGRADE_HANDLER.approveUpgradeSecurityCouncil(_id); } /// @notice Initiates the protocol soft freeze by small threshold of the Security Council members. /// @param _validUntil The timestamp until which the signature should remain valid. /// @param _signers An array of signers associated with the signatures. /// @param _signatures An array of signatures from council members approving the freeze. function softFreeze(uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures) external { require(block.timestamp < _validUntil, "Signature expired"); bytes32 digest = _hashTypedDataV4( keccak256(abi.encode(SOFT_FREEZE_SECURITY_COUNCIL_TYPEHASH, softFreezeNonce++, _validUntil)) ); checkSignatures(digest, _signers, _signatures, softFreezeThreshold); // Reset threshold softFreezeThreshold = SOFT_FREEZE_CONSERVATIVE_THRESHOLD; PROTOCOL_UPGRADE_HANDLER.softFreeze(); } /// @notice Initiates the protocol hard freeze by majority of the Security Council members. /// @param _validUntil The timestamp until which the signature should remain valid. /// @param _signers An array of signers associated with the signatures. /// @param _signatures An array of signatures from council members approving the freeze. function hardFreeze(uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures) external { require(block.timestamp < _validUntil, "Signature expired"); bytes32 digest = _hashTypedDataV4( keccak256(abi.encode(HARD_FREEZE_SECURITY_COUNCIL_TYPEHASH, hardFreezeNonce++, _validUntil)) ); checkSignatures(digest, _signers, _signatures, HARD_FREEZE_THRESHOLD); PROTOCOL_UPGRADE_HANDLER.hardFreeze(); } /// @notice Initiates the protocol unfreeze by the Security Council members. /// @param _validUntil The timestamp until which the signature should remain valid. /// @param _signers An array of signers associated with the signatures. /// @param _signatures An array of signatures from council members approving the unfreeze. function unfreeze(uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures) external { require(block.timestamp < _validUntil, "Signature expired"); bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(UNFREEZE_TYPEHASH, unfreezeNonce++, _validUntil))); checkSignatures(digest, _signers, _signatures, UNFREEZE_THRESHOLD); PROTOCOL_UPGRADE_HANDLER.unfreeze(); } /// @notice Sets the threshold for triggering a soft freeze. /// @param _threshold New threshold for the Security Council members for approving the soft freeze. /// @param _validUntil The timestamp until which the signature should remain valid. /// @param _signers An array of signers associated with the signatures. /// @param _signatures An array of signatures from council members approving the threshold setting. function setSoftFreezeThreshold( uint256 _threshold, uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures ) external { require(_threshold > 0, "Threshold is too small"); require(_threshold <= SOFT_FREEZE_CONSERVATIVE_THRESHOLD, "Threshold is too big"); require(block.timestamp < _validUntil, "Signature expired"); bytes32 digest = _hashTypedDataV4( keccak256( abi.encode( SET_SOFT_FREEZE_THRESHOLD_TYPEHASH, _threshold, softFreezeThresholdSettingNonce++, _validUntil ) ) ); checkSignatures(digest, _signers, _signatures, SOFT_FREEZE_CONSERVATIVE_THRESHOLD); softFreezeThreshold = _threshold; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; /// @author Matter Labs /// @custom:security-contact [email protected] interface ISecurityCouncil { function approveUpgradeSecurityCouncil(bytes32 _id, address[] calldata _signers, bytes[] calldata _signatures) external; function softFreeze(uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures) external; function hardFreeze(uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures) external; function unfreeze(uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures) external; function setSoftFreezeThreshold( uint256 _threshold, uint256 _validUntil, address[] calldata _signers, bytes[] calldata _signatures ) external; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; /// @author Matter Labs /// @custom:security-contact [email protected] interface IProtocolUpgradeHandler { /// @dev This enumeration includes the following states: /// @param None Default state, indicating the upgrade has not been set. /// @param LegalVetoPeriod The upgrade passed L2 voting process but it is waiting for the legal veto period. /// @param Waiting The upgrade passed Legal Veto period but it is waiting for the approval from guardians or Security Council. /// @param ExecutionPending The upgrade proposal is waiting for the delay period before being ready for execution. /// @param Ready The upgrade proposal is ready to be executed. /// @param Expired The upgrade proposal was expired. /// @param Done The upgrade has been successfully executed. enum UpgradeState { None, LegalVetoPeriod, Waiting, ExecutionPending, Ready, Expired, Done } /// @dev Represents the status of an upgrade process, including the creation timestamp and actions made by guardians and Security Council. /// @param creationTimestamp The timestamp (in seconds) when the upgrade state was created. /// @param securityCouncilApprovalTimestamp The timestamp (in seconds) when Security Council approved the upgrade. /// @param guardiansApproval Indicates whether the upgrade has been approved by the guardians. /// @param guardiansExtendedLegalVeto Indicates whether guardians extended the legal veto period. /// @param executed Indicates whether the proposal is executed or not. struct UpgradeStatus { uint48 creationTimestamp; uint48 securityCouncilApprovalTimestamp; bool guardiansApproval; bool guardiansExtendedLegalVeto; bool executed; } /// @dev Represents a call to be made during an upgrade. /// @param target The address to which the call will be made. /// @param value The amount of Ether (in wei) to be sent along with the call. /// @param data The calldata to be executed on the `target` address. struct Call { address target; uint256 value; bytes data; } /// @dev Defines the structure of an upgrade that is executed by Protocol Upgrade Handler. /// @param executor The L1 address that is authorized to perform the upgrade execution (if address(0) then anyone). /// @param calls An array of `Call` structs, each representing a call to be made during the upgrade execution. /// @param salt A bytes32 value used for creating unique upgrade proposal hashes. struct UpgradeProposal { Call[] calls; address executor; bytes32 salt; } /// @dev This enumeration includes the following states: /// @param None Default state, indicating the freeze has not been happening in this upgrade cycle. /// @param Soft The protocol is/was frozen for the short time. /// @param Hard The protocol is/was frozen for the long time. /// @param AfterSoftFreeze The protocol was soft frozen, it can be hard frozen in this upgrade cycle. /// @param AfterHardFreeze The protocol was hard frozen, but now it can't be frozen until the upgrade. enum FreezeStatus { None, Soft, Hard, AfterSoftFreeze, AfterHardFreeze } function startUpgrade( uint256 _l2BatchNumber, uint256 _l2MessageIndex, uint16 _l2TxNumberInBatch, bytes32[] calldata _proof, UpgradeProposal calldata _proposal ) external; function extendLegalVeto(bytes32 _id) external; function approveUpgradeSecurityCouncil(bytes32 _id) external; function approveUpgradeGuardians(bytes32 _id) external; function execute(UpgradeProposal calldata _proposal) external payable; function executeEmergencyUpgrade(UpgradeProposal calldata _proposal) external payable; function softFreeze() external; function hardFreeze() external; function reinforceFreeze() external; function unfreeze() external; function reinforceFreezeOneChain(uint256 _chainId) external; function reinforceUnfreeze() external; function reinforceUnfreezeOneChain(uint256 _chainId) external; function upgradeState(bytes32 _id) external view returns (UpgradeState); function updateSecurityCouncil(address _newSecurityCouncil) external; function updateGuardians(address _newGuardians) external; function updateEmergencyUpgradeBoard(address _newEmergencyUpgradeBoard) external; /// @notice Emitted when the security council address is changed. event ChangeSecurityCouncil(address indexed _securityCouncilBefore, address indexed _securityCouncilAfter); /// @notice Emitted when the guardians address is changed. event ChangeGuardians(address indexed _guardiansBefore, address indexed _guardiansAfter); /// @notice Emitted when the emergency upgrade board address is changed. event ChangeEmergencyUpgradeBoard( address indexed _emergencyUpgradeBoardBefore, address indexed _emergencyUpgradeBoardAfter ); /// @notice Emitted when upgrade process on L1 is started. event UpgradeStarted(bytes32 indexed _id, UpgradeProposal _proposal); /// @notice Emitted when the legal veto period is extended. event UpgradeLegalVetoExtended(bytes32 indexed _id); /// @notice Emitted when Security Council approved the upgrade. event UpgradeApprovedBySecurityCouncil(bytes32 indexed _id); /// @notice Emitted when Guardians approved the upgrade. event UpgradeApprovedByGuardians(bytes32 indexed _id); /// @notice Emitted when the upgrade is executed. event UpgradeExecuted(bytes32 indexed _id); /// @notice Emitted when the emergency upgrade is executed. event EmergencyUpgradeExecuted(bytes32 indexed _id); /// @notice Emitted when the protocol became soft frozen. event SoftFreeze(uint256 _protocolFrozenUntil); /// @notice Emitted when the protocol became hard frozen. event HardFreeze(uint256 _protocolFrozenUntil); /// @notice Emitted when someone makes an attempt to freeze the protocol when it is frozen already. event ReinforceFreeze(); /// @notice Emitted when the protocol became active after the soft/hard freeze. event Unfreeze(); /// @notice Emitted when someone makes an attempt to freeze the specific chain when the protocol is frozen already. event ReinforceFreezeOneChain(uint256 _chainId); /// @notice Emitted when someone makes an attempt to unfreeze the protocol when it is unfrozen already. event ReinforceUnfreeze(); /// @notice Emitted when someone makes an attempt to unfreeze the specific chain when the protocol is unfrozen already. event ReinforceUnfreezeOneChain(uint256 _chainId); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {SignatureChecker} from "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol"; import {IERC1271} from "@openzeppelin/contracts/interfaces/IERC1271.sol"; /// @title Multisig /// @dev An abstract contract implementing a basic multisig wallet functionality. /// This contract allows a group of members to collectively authorize actions /// by submitting a threshold number of valid signatures. /// @author Matter Labs /// @custom:security-contact [email protected] abstract contract Multisig is IERC1271 { using SignatureChecker for address; /// @notice List of addresses authorized as members of the multisig. address[] public members; /// @notice The threshold for EIP-1271 signature verification. uint256 public immutable EIP1271_THRESHOLD; /// @dev Initializes the contract by setting the sorted list of multisig members. /// Members must be unique and sorted in ascending order to ensure efficient /// signature verification. /// @param _members Array of addresses to be set as multisig members. /// Expected to be sorted without duplicates. /// @param _eip1271Threshold The threshold for EIP-1271 signature verification. constructor(address[] memory _members, uint256 _eip1271Threshold) { require(_eip1271Threshold > 0, "EIP-1271 threshold is too small"); require(_eip1271Threshold <= _members.length, "EIP-1271 threshold is too big"); EIP1271_THRESHOLD = _eip1271Threshold; address lastAddress; for (uint256 i = 0; i < _members.length; ++i) { address currentMember = _members[i]; // Ensure the members list is strictly ascending to prevent duplicates and enable efficient signature checks. require(lastAddress < currentMember, "Members not sorted or duplicate found"); members.push(currentMember); lastAddress = currentMember; } } /// @dev The function to check if the provided signatures meet the threshold requirement. /// Signatures must be from unique members and are expected in the same order as the members list (sorted order). /// @param _digest The hash of the data being signed. /// @param _signers An array of signers associated with the signatures. /// @param _signatures An array of signatures to be validated. /// @param _threshold The minimum number of valid signatures required to pass the check. function checkSignatures(bytes32 _digest, address[] memory _signers, bytes[] memory _signatures, uint256 _threshold) public view { // Ensure the total number of signatures meets or exceeds the threshold. require(_signatures.length >= _threshold, "Insufficient valid signatures"); require(_signers.length == _signatures.length, "Inconsistent signers/signatures length"); uint256 currentMember; for (uint256 i = 0; i < _signatures.length; ++i) { bool success = _signers[i].isValidSignatureNow(_digest, _signatures[i]); require(success, "Signature verification failed"); while (members[currentMember] != _signers[i]) { currentMember++; } currentMember++; } } /// @dev The function to check if the provided signatures are valid and meet predefined threshold. /// @param _digest The hash of the data being signed. /// @param _signature An array of signers and signatures to be validated ABI encoded from `address[], bytes[]` to `abi.decode(data,(address[],bytes[]))`. function isValidSignature(bytes32 _digest, bytes calldata _signature) external view override returns (bytes4) { (address[] memory signers, bytes[] memory signatures) = abi.decode(_signature, (address[], bytes[])); checkSignatures(_digest, signers, signatures, EIP1271_THRESHOLD); return IERC1271.isValidSignature.selector; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/EIP712.sol) pragma solidity ^0.8.20; import {MessageHashUtils} from "./MessageHashUtils.sol"; import {ShortStrings, ShortString} from "../ShortStrings.sol"; import {IERC5267} from "../../interfaces/IERC5267.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose * encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract * does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to * produce the hash of their typed data using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain * separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the * separator from the immutable values, which is cheaper than accessing a cached version in cold storage. * * @custom:oz-upgrades-unsafe-allow state-variable-immutable */ abstract contract EIP712 is IERC5267 { using ShortStrings for *; bytes32 private constant TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"); // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _cachedDomainSeparator; uint256 private immutable _cachedChainId; address private immutable _cachedThis; bytes32 private immutable _hashedName; bytes32 private immutable _hashedVersion; ShortString private immutable _name; ShortString private immutable _version; string private _nameFallback; string private _versionFallback; /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { _name = name.toShortStringWithFallback(_nameFallback); _version = version.toShortStringWithFallback(_versionFallback); _hashedName = keccak256(bytes(name)); _hashedVersion = keccak256(bytes(version)); _cachedChainId = block.chainid; _cachedDomainSeparator = _buildDomainSeparator(); _cachedThis = address(this); } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _cachedThis && block.chainid == _cachedChainId) { return _cachedDomainSeparator; } else { return _buildDomainSeparator(); } } function _buildDomainSeparator() private view returns (bytes32) { return keccak256(abi.encode(TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash); } /** * @dev See {IERC-5267}. */ function eip712Domain() public view virtual returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ) { return ( hex"0f", // 01111 _EIP712Name(), _EIP712Version(), block.chainid, address(this), bytes32(0), new uint256[](0) ); } /** * @dev The name parameter for the EIP712 domain. * * NOTE: By default this function reads _name which is an immutable value. * It only reads from storage if necessary (in case the value is too large to fit in a ShortString). */ // solhint-disable-next-line func-name-mixedcase function _EIP712Name() internal view returns (string memory) { return _name.toStringWithFallback(_nameFallback); } /** * @dev The version parameter for the EIP712 domain. * * NOTE: By default this function reads _version which is an immutable value. * It only reads from storage if necessary (in case the value is too large to fit in a ShortString). */ // solhint-disable-next-line func-name-mixedcase function _EIP712Version() internal view returns (string memory) { return _version.toStringWithFallback(_versionFallback); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/SignatureChecker.sol) pragma solidity ^0.8.20; import {ECDSA} from "./ECDSA.sol"; import {IERC1271} from "../../interfaces/IERC1271.sol"; /** * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like * Argent and Safe Wallet (previously Gnosis Safe). */ library SignatureChecker { /** * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`. * * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus * change through time. It could return true at block N and false at block N+1 (or the opposite). */ function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) { (address recovered, ECDSA.RecoverError error, ) = ECDSA.tryRecover(hash, signature); return (error == ECDSA.RecoverError.NoError && recovered == signer) || isValidERC1271SignatureNow(signer, hash, signature); } /** * @dev Checks if a signature is valid for a given signer and data hash. The signature is validated * against the signer smart contract using ERC1271. * * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus * change through time. It could return true at block N and false at block N+1 (or the opposite). */ function isValidERC1271SignatureNow( address signer, bytes32 hash, bytes memory signature ) internal view returns (bool) { (bool success, bytes memory result) = signer.staticcall( abi.encodeCall(IERC1271.isValidSignature, (hash, signature)) ); return (success && result.length >= 32 && abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1271.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC1271 standard signature validation method for * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271]. */ interface IERC1271 { /** * @dev Should return whether the signature provided is valid for the provided data * @param hash Hash of the data to be signed * @param signature Signature byte array associated with _data */ function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol) pragma solidity ^0.8.20; import {Strings} from "../Strings.sol"; /** * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing. * * The library provides methods for generating a hash of a message that conforms to the * https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712] * specifications. */ library MessageHashUtils { /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x45` (`personal_sign` messages). * * The digest is calculated by prefixing a bytes32 `messageHash` with * `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. * * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with * keccak256, although any bytes32 value can be safely used because the final digest will * be re-hashed. * * See {ECDSA-recover}. */ function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) { /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20) } } /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x45` (`personal_sign` messages). * * The digest is calculated by prefixing an arbitrary `message` with * `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. * * See {ECDSA-recover}. */ function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) { return keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message)); } /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x00` (data with intended validator). * * The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended * `validator` address. Then hashing the result. * * See {ECDSA-recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked(hex"19_00", validator, data)); } /** * @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`). * * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with * `\x19\x01` and hashing the result. It corresponds to the hash signed by the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712. * * See {ECDSA-recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, hex"19_01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) digest := keccak256(ptr, 0x42) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/ShortStrings.sol) pragma solidity ^0.8.20; import {StorageSlot} from "./StorageSlot.sol"; // | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA | // | length | 0x BB | type ShortString is bytes32; /** * @dev This library provides functions to convert short memory strings * into a `ShortString` type that can be used as an immutable variable. * * Strings of arbitrary length can be optimized using this library if * they are short enough (up to 31 bytes) by packing them with their * length (1 byte) in a single EVM word (32 bytes). Additionally, a * fallback mechanism can be used for every other case. * * Usage example: * * ```solidity * contract Named { * using ShortStrings for *; * * ShortString private immutable _name; * string private _nameFallback; * * constructor(string memory contractName) { * _name = contractName.toShortStringWithFallback(_nameFallback); * } * * function name() external view returns (string memory) { * return _name.toStringWithFallback(_nameFallback); * } * } * ``` */ library ShortStrings { // Used as an identifier for strings longer than 31 bytes. bytes32 private constant FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF; error StringTooLong(string str); error InvalidShortString(); /** * @dev Encode a string of at most 31 chars into a `ShortString`. * * This will trigger a `StringTooLong` error is the input string is too long. */ function toShortString(string memory str) internal pure returns (ShortString) { bytes memory bstr = bytes(str); if (bstr.length > 31) { revert StringTooLong(str); } return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length)); } /** * @dev Decode a `ShortString` back to a "normal" string. */ function toString(ShortString sstr) internal pure returns (string memory) { uint256 len = byteLength(sstr); // using `new string(len)` would work locally but is not memory safe. string memory str = new string(32); /// @solidity memory-safe-assembly assembly { mstore(str, len) mstore(add(str, 0x20), sstr) } return str; } /** * @dev Return the length of a `ShortString`. */ function byteLength(ShortString sstr) internal pure returns (uint256) { uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF; if (result > 31) { revert InvalidShortString(); } return result; } /** * @dev Encode a string into a `ShortString`, or write it to storage if it is too long. */ function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) { if (bytes(value).length < 32) { return toShortString(value); } else { StorageSlot.getStringSlot(store).value = value; return ShortString.wrap(FALLBACK_SENTINEL); } } /** * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}. */ function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) { if (ShortString.unwrap(value) != FALLBACK_SENTINEL) { return toString(value); } else { return store; } } /** * @dev Return the length of a string that was encoded to `ShortString` or written to storage using * {setWithFallback}. * * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of * actual characters as the UTF-8 encoding of a single character can span over multiple bytes. */ function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) { if (ShortString.unwrap(value) != FALLBACK_SENTINEL) { return byteLength(value); } else { return bytes(store).length; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol) pragma solidity ^0.8.20; interface IERC5267 { /** * @dev MAY be emitted to signal that the domain could have changed. */ event EIP712DomainChanged(); /** * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712 * signature. */ function eip712Domain() external view returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.20; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS } /** * @dev The signature derives the `address(0)`. */ error ECDSAInvalidSignature(); /** * @dev The signature has an invalid length. */ error ECDSAInvalidSignatureLength(uint256 length); /** * @dev The signature has an S value that is in the upper half order. */ error ECDSAInvalidSignatureS(bytes32 s); /** * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not * return address(0) without also returning an error description. Errors are documented using an enum (error type) * and a bytes32 providing additional information about the error. * * If no error is returned, then the address can be used for verification purposes. * * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length)); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature); _throwError(error, errorArg); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] */ function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) { unchecked { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); // We do not check for an overflow here since the shift operation results in 0 or 1. uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. */ function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs); _throwError(error, errorArg); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError, bytes32) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS, s); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature, bytes32(0)); } return (signer, RecoverError.NoError, bytes32(0)); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s); _throwError(error, errorArg); return recovered; } /** * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided. */ function _throwError(RecoverError error, bytes32 errorArg) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert ECDSAInvalidSignature(); } else if (error == RecoverError.InvalidSignatureLength) { revert ECDSAInvalidSignatureLength(uint256(errorArg)); } else if (error == RecoverError.InvalidSignatureS) { revert ECDSAInvalidSignatureS(errorArg); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol) pragma solidity ^0.8.20; import {Math} from "./math/Math.sol"; import {SignedMath} from "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant HEX_DIGITS = "0123456789abcdef"; uint8 private constant ADDRESS_LENGTH = 20; /** * @dev The `value` string doesn't fit in the specified `length`. */ error StringsInsufficientHexLength(uint256 value, uint256 length); /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), HEX_DIGITS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toStringSigned(int256 value) internal pure returns (string memory) { return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { uint256 localValue = value; bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = HEX_DIGITS[localValue & 0xf]; localValue >>= 4; } if (localValue != 0) { revert StringsInsufficientHexLength(value, length); } return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal * representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol) // This file was procedurally generated from scripts/generate/templates/StorageSlot.js. pragma solidity ^0.8.20; /** * @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: * ```solidity * 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(newImplementation.code.length > 0); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` */ library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } struct StringSlot { string value; } struct BytesSlot { bytes 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 } } /** * @dev Returns an `StringSlot` with member `value` located at `slot`. */ function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` representation of the string storage pointer `store`. */ function getStringSlot(string storage store) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } /** * @dev Returns an `BytesSlot` with member `value` located at `slot`. */ function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`. */ function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol) pragma solidity ^0.8.20; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Muldiv operation overflow. */ error MathOverflowedMulDiv(); enum Rounding { Floor, // Toward negative infinity Ceil, // Toward positive infinity Trunc, // Toward zero Expand // Away from zero } /** * @dev Returns the addition of two unsigned integers, with an overflow flag. */ 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 subtraction of two unsigned integers, with an overflow flag. */ 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. */ 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. */ 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. */ 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 largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds towards infinity instead * of rounding towards zero. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { if (b == 0) { // Guarantee the same behavior as in a regular Solidity division. return a / b; } // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or * denominator == 0. * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by * Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0 = x * y; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. if (denominator <= prod1) { revert MathOverflowedMulDiv(); } /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. // Always >= 1. See https://cs.stackexchange.com/q/138556/92363. uint256 twos = denominator & (0 - denominator); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also // works in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded * towards zero. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256 of a positive value rounded towards zero. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0); } } /** * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers. */ function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) { return uint8(rounding) % 2 == 1; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.20; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
{ "remappings": [ "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/", "ds-test/=lib/openzeppelin-contracts/lib/forge-std/lib/ds-test/src/", "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/", "forge-std/=lib/forge-std/src/", "openzeppelin-contracts/=lib/openzeppelin-contracts/" ], "optimizer": { "enabled": true, "runs": 200 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "ipfs", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "paris", "viaIR": false, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"contract IProtocolUpgradeHandler","name":"_protocolUpgradeHandler","type":"address"},{"internalType":"address[]","name":"_members","type":"address[]"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"InvalidShortString","type":"error"},{"inputs":[{"internalType":"string","name":"str","type":"string"}],"name":"StringTooLong","type":"error"},{"anonymous":false,"inputs":[],"name":"EIP712DomainChanged","type":"event"},{"inputs":[],"name":"APPROVE_UPGRADE_SECURITY_COUNCIL_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"EIP1271_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"HARD_FREEZE_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PROTOCOL_UPGRADE_HANDLER","outputs":[{"internalType":"contract IProtocolUpgradeHandler","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"RECOMMENDED_SOFT_FREEZE_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SOFT_FREEZE_CONSERVATIVE_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"UNFREEZE_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_id","type":"bytes32"},{"internalType":"address[]","name":"_signers","type":"address[]"},{"internalType":"bytes[]","name":"_signatures","type":"bytes[]"}],"name":"approveUpgradeSecurityCouncil","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_digest","type":"bytes32"},{"internalType":"address[]","name":"_signers","type":"address[]"},{"internalType":"bytes[]","name":"_signatures","type":"bytes[]"},{"internalType":"uint256","name":"_threshold","type":"uint256"}],"name":"checkSignatures","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[],"name":"eip712Domain","outputs":[{"internalType":"bytes1","name":"fields","type":"bytes1"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"version","type":"string"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"address","name":"verifyingContract","type":"address"},{"internalType":"bytes32","name":"salt","type":"bytes32"},{"internalType":"uint256[]","name":"extensions","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_validUntil","type":"uint256"},{"internalType":"address[]","name":"_signers","type":"address[]"},{"internalType":"bytes[]","name":"_signatures","type":"bytes[]"}],"name":"hardFreeze","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"hardFreezeNonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_digest","type":"bytes32"},{"internalType":"bytes","name":"_signature","type":"bytes"}],"name":"isValidSignature","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"members","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_threshold","type":"uint256"},{"internalType":"uint256","name":"_validUntil","type":"uint256"},{"internalType":"address[]","name":"_signers","type":"address[]"},{"internalType":"bytes[]","name":"_signatures","type":"bytes[]"}],"name":"setSoftFreezeThreshold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_validUntil","type":"uint256"},{"internalType":"address[]","name":"_signers","type":"address[]"},{"internalType":"bytes[]","name":"_signatures","type":"bytes[]"}],"name":"softFreeze","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"softFreezeNonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"softFreezeThreshold","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"softFreezeThresholdSettingNonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_validUntil","type":"uint256"},{"internalType":"address[]","name":"_signers","type":"address[]"},{"internalType":"bytes[]","name":"_signatures","type":"bytes[]"}],"name":"unfreeze","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unfreezeNonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _protocolUpgradeHandler (address): 0x8f7a9912416e8AdC4D9c21FAe1415D3318A11897
Arg [1] : _members (address[]): 0x13f07d9BF17615f6a17F272fe1A913168C275A66,0x34Ea62D4b9bBB8AD927eFB6ab31E3Ab3474aC93a,0x35eA56fd9eAd2567F339Eb9564B6940b9DD5653F,0x3888777686F0b0d8c3108fc22ad8DE9E049bE26F,0x69462a81ba94D64c404575f1899a464F123497A2,0x725065b4eB99294BaaE57AdDA9c32e42F453FA8A,0x84BF0Ac41Eeb74373Ddddae8b7055Bf2bD3CE6E0,0x9B39Ea22e838B316Ea7D74e7C4B07d91D51ccA88,0x9B8Be3278B7F0168D82059eb6BAc5991DcdfA803,0xB7aC3A79A23B148c85fba259712c5A1e7ad0ca44,0xc3Abc9f9AA75Be8341E831482cdA0125a7B1A23e,0xFB90Da9DC45378A1B50775Beb03aD10C7E8DC231
-----Encoded View---------------
15 Constructor Arguments found :
Arg [0] : 0000000000000000000000008f7a9912416e8adc4d9c21fae1415d3318a11897
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [2] : 000000000000000000000000000000000000000000000000000000000000000c
Arg [3] : 00000000000000000000000013f07d9bf17615f6a17f272fe1a913168c275a66
Arg [4] : 00000000000000000000000034ea62d4b9bbb8ad927efb6ab31e3ab3474ac93a
Arg [5] : 00000000000000000000000035ea56fd9ead2567f339eb9564b6940b9dd5653f
Arg [6] : 0000000000000000000000003888777686f0b0d8c3108fc22ad8de9e049be26f
Arg [7] : 00000000000000000000000069462a81ba94d64c404575f1899a464f123497a2
Arg [8] : 000000000000000000000000725065b4eb99294baae57adda9c32e42f453fa8a
Arg [9] : 00000000000000000000000084bf0ac41eeb74373ddddae8b7055bf2bd3ce6e0
Arg [10] : 0000000000000000000000009b39ea22e838b316ea7d74e7c4b07d91d51cca88
Arg [11] : 0000000000000000000000009b8be3278b7f0168d82059eb6bac5991dcdfa803
Arg [12] : 000000000000000000000000b7ac3a79a23b148c85fba259712c5a1e7ad0ca44
Arg [13] : 000000000000000000000000c3abc9f9aa75be8341e831482cda0125a7b1a23e
Arg [14] : 000000000000000000000000fb90da9dc45378a1b50775beb03ad10c7e8dc231
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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.