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Contract Name:
DivaGovernor
Compiler Version
v0.8.19+commit.7dd6d404
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.19; import "@openzeppelin/contracts/governance/Governor.sol"; import "@openzeppelin/contracts/governance/extensions/GovernorSettings.sol"; import "@openzeppelin/contracts/governance/extensions/GovernorVotes.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "./GovernorTimelockControlConfigurable.sol"; import "./GovernorCountingThresholds.sol"; import "./DivaTimelockController.sol"; /** * @dev A cancellation proposal cannot have a value */ error CancellationProposalCannotHaveValue(); /** * @dev Updating quorum to a value lower than the minimum quorum */ error QuorumTooLow(uint256 quorum, uint256 minQuorum); /** * @title DivaGovernor Contract * @author ShamirLabs * @notice DivaGovernor is an Open Zeppelin governor contract with customizations for the * success thresholds and timelock controller aiming to securize the governance process while * avoiding the need of roles and permissions. * The main features are: * - proposal threshold, anyone with a minimum amount of voting power can create a proposal. * - voting delay, after the proposal is submitted on-chain, there is a waiting period where token * holders can delegate their voting power. * - voting period, after the voting delay, the proposal can be voted on-chain. * - absolute quorum * - a successful proposal is queued in the timelock controller. * - a successful proposal can be executed after the timelock delay. * * A successful proposal can be enqueued by anyone. * A successful proposal can be executed by anyone. * * Any potentially malicious proposal can be cancelled by governance with another proposal with reduced * timelock waiting period. */ contract DivaGovernor is Governor, GovernorSettings, GovernorVotes, GovernorTimelockControlConfigurable, GovernorCountingThresholds { uint256 public constant MIN_QUORUM = 5_000_000_000_000_000_000_000_000; // 5 M DIVA tokens is the minimum quorum. struct GovernanceParameters { string governorName; uint16 votingDelay; uint32 votingPeriod; uint256 quorumAbsolute; uint256 proposalThreshold; uint256 defaultDelay; uint256 shortDelay; uint256 longDelay; bytes4[] functionSignatures; DelayType[] functionDelays; ThresholdType[] functionThresholds; } uint256 private _quorum; /** * @dev Emitted when the quorum is updated. */ event QuorumUpdated(uint256 oldQuorum, uint256 newQuorum); /** * @dev DivaGovernor Constructor * @param _token ERC20 token with ERC20Votes extension * @param _timelock DivaTimelockControlller instance * @param _settings governor settings */ constructor( IVotes _token, DivaTimelockController _timelock, GovernanceParameters memory _settings ) Governor(_settings.governorName) GovernorSettings( _settings.votingDelay, _settings.votingPeriod, _settings.proposalThreshold ) GovernorVotes(_token) GovernorTimelockControlConfigurable( _timelock, _settings.functionSignatures, _settings.functionDelays, _settings.defaultDelay, _settings.shortDelay, _settings.longDelay ) GovernorCountingThresholds( _settings.functionSignatures, _settings.functionThresholds ) { _quorum = _settings.quorumAbsolute; } /** * @dev Changes the quorum. * * Emits a {QuorumUpdated} event. * * Requirements: * * - Must be called through a governance proposal. */ function updateQuorum(uint256 newQuorum) external onlyGovernance { if (newQuorum < MIN_QUORUM) revert QuorumTooLow(newQuorum, MIN_QUORUM); uint256 oldQuorum = _quorum; _quorum = newQuorum; emit QuorumUpdated(oldQuorum, newQuorum); } /** * @dev Returns the quorum. */ function quorum(uint256) public view override returns (uint256) { return _quorum; } // The following functions are overrides required by Solidity. function votingDelay() public view override(IGovernor, GovernorSettings) returns (uint256) { return super.votingDelay(); } function votingPeriod() public view override(IGovernor, GovernorSettings) returns (uint256) { return super.votingPeriod(); } /** * @dev Get the state of a proposal * @param proposalId id of the proposal */ function state( uint256 proposalId ) public view override(Governor, GovernorTimelockControlConfigurable) returns (ProposalState) { return super.state(proposalId); } /** * @dev Submit a proposal on-chain * @param targets list of contracts to call * @param values list of values to pass in the call * @param calldatas list of calldatas for the call * @param description description of the proposal */ function propose( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, string memory description ) public override(Governor, IGovernor) returns (uint256) { // @dev a cancellation proposal cannot have value. for (uint256 i = 0; i < calldatas.length; i++) { bytes4 sig = bytes4(calldatas[i]); if (sig == CANCEL_PROPOSAL_TYPEHASH && values[i] > 0) revert CancellationProposalCannotHaveValue(); } _setSuccessThreshold(targets, values, calldatas, description); return super.propose(targets, values, calldatas, description); } /** * @dev Voting power need to be able to create a proposal */ function proposalThreshold() public view override(Governor, GovernorSettings) returns (uint256) { return super.proposalThreshold(); } /** * @dev Execute a successful proposal * @param proposalId id of the proposal */ function _execute( uint256 proposalId, address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) internal override(Governor, GovernorTimelockControlConfigurable) { super._execute(proposalId, targets, values, calldatas, descriptionHash); } /** * @notice Cancel a proposal from governor. (Not publicly available in diva governor) */ function _cancel( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) internal override(Governor) returns (uint256) { return super._cancel(targets, values, calldatas, descriptionHash); } /** * @notice Get the address of the executor */ function _executor() internal view override(Governor, GovernorTimelockControlConfigurable) returns (address) { return super._executor(); } function supportsInterface( bytes4 interfaceId ) public view override(Governor, GovernorTimelockControlConfigurable) returns (bool) { return super.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ```solidity * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ```solidity * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules} * to enforce additional security measures for this role. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(account), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * May emit a {RoleGranted} event. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (governance/Governor.sol) pragma solidity ^0.8.0; import "../token/ERC721/IERC721Receiver.sol"; import "../token/ERC1155/IERC1155Receiver.sol"; import "../utils/cryptography/ECDSA.sol"; import "../utils/cryptography/EIP712.sol"; import "../utils/introspection/ERC165.sol"; import "../utils/math/SafeCast.sol"; import "../utils/structs/DoubleEndedQueue.sol"; import "../utils/Address.sol"; import "../utils/Context.sol"; import "./IGovernor.sol"; /** * @dev Core of the governance system, designed to be extended though various modules. * * This contract is abstract and requires several functions to be implemented in various modules: * * - A counting module must implement {quorum}, {_quorumReached}, {_voteSucceeded} and {_countVote} * - A voting module must implement {_getVotes} * - Additionally, {votingPeriod} must also be implemented * * _Available since v4.3._ */ abstract contract Governor is Context, ERC165, EIP712, IGovernor, IERC721Receiver, IERC1155Receiver { using DoubleEndedQueue for DoubleEndedQueue.Bytes32Deque; bytes32 public constant BALLOT_TYPEHASH = keccak256("Ballot(uint256 proposalId,uint8 support)"); bytes32 public constant EXTENDED_BALLOT_TYPEHASH = keccak256("ExtendedBallot(uint256 proposalId,uint8 support,string reason,bytes params)"); // solhint-disable var-name-mixedcase struct ProposalCore { // --- start retyped from Timers.BlockNumber at offset 0x00 --- uint64 voteStart; address proposer; bytes4 __gap_unused0; // --- start retyped from Timers.BlockNumber at offset 0x20 --- uint64 voteEnd; bytes24 __gap_unused1; // --- Remaining fields starting at offset 0x40 --------------- bool executed; bool canceled; } // solhint-enable var-name-mixedcase string private _name; /// @custom:oz-retyped-from mapping(uint256 => Governor.ProposalCore) mapping(uint256 => ProposalCore) private _proposals; // This queue keeps track of the governor operating on itself. Calls to functions protected by the // {onlyGovernance} modifier needs to be whitelisted in this queue. Whitelisting is set in {_beforeExecute}, // consumed by the {onlyGovernance} modifier and eventually reset in {_afterExecute}. This ensures that the // execution of {onlyGovernance} protected calls can only be achieved through successful proposals. DoubleEndedQueue.Bytes32Deque private _governanceCall; /** * @dev Restricts a function so it can only be executed through governance proposals. For example, governance * parameter setters in {GovernorSettings} are protected using this modifier. * * The governance executing address may be different from the Governor's own address, for example it could be a * timelock. This can be customized by modules by overriding {_executor}. The executor is only able to invoke these * functions during the execution of the governor's {execute} function, and not under any other circumstances. Thus, * for example, additional timelock proposers are not able to change governance parameters without going through the * governance protocol (since v4.6). */ modifier onlyGovernance() { require(_msgSender() == _executor(), "Governor: onlyGovernance"); if (_executor() != address(this)) { bytes32 msgDataHash = keccak256(_msgData()); // loop until popping the expected operation - throw if deque is empty (operation not authorized) while (_governanceCall.popFront() != msgDataHash) {} } _; } /** * @dev Sets the value for {name} and {version} */ constructor(string memory name_) EIP712(name_, version()) { _name = name_; } /** * @dev Function to receive ETH that will be handled by the governor (disabled if executor is a third party contract) */ receive() external payable virtual { require(_executor() == address(this), "Governor: must send to executor"); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) { bytes4 governorCancelId = this.cancel.selector ^ this.proposalProposer.selector; bytes4 governorParamsId = this.castVoteWithReasonAndParams.selector ^ this.castVoteWithReasonAndParamsBySig.selector ^ this.getVotesWithParams.selector; // The original interface id in v4.3. bytes4 governor43Id = type(IGovernor).interfaceId ^ type(IERC6372).interfaceId ^ governorCancelId ^ governorParamsId; // An updated interface id in v4.6, with params added. bytes4 governor46Id = type(IGovernor).interfaceId ^ type(IERC6372).interfaceId ^ governorCancelId; // For the updated interface id in v4.9, we use governorCancelId directly. return interfaceId == governor43Id || interfaceId == governor46Id || interfaceId == governorCancelId || interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IGovernor-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IGovernor-version}. */ function version() public view virtual override returns (string memory) { return "1"; } /** * @dev See {IGovernor-hashProposal}. * * The proposal id is produced by hashing the ABI encoded `targets` array, the `values` array, the `calldatas` array * and the descriptionHash (bytes32 which itself is the keccak256 hash of the description string). This proposal id * can be produced from the proposal data which is part of the {ProposalCreated} event. It can even be computed in * advance, before the proposal is submitted. * * Note that the chainId and the governor address are not part of the proposal id computation. Consequently, the * same proposal (with same operation and same description) will have the same id if submitted on multiple governors * across multiple networks. This also means that in order to execute the same operation twice (on the same * governor) the proposer will have to change the description in order to avoid proposal id conflicts. */ function hashProposal( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public pure virtual override returns (uint256) { return uint256(keccak256(abi.encode(targets, values, calldatas, descriptionHash))); } /** * @dev See {IGovernor-state}. */ function state(uint256 proposalId) public view virtual override returns (ProposalState) { ProposalCore storage proposal = _proposals[proposalId]; if (proposal.executed) { return ProposalState.Executed; } if (proposal.canceled) { return ProposalState.Canceled; } uint256 snapshot = proposalSnapshot(proposalId); if (snapshot == 0) { revert("Governor: unknown proposal id"); } uint256 currentTimepoint = clock(); if (snapshot >= currentTimepoint) { return ProposalState.Pending; } uint256 deadline = proposalDeadline(proposalId); if (deadline >= currentTimepoint) { return ProposalState.Active; } if (_quorumReached(proposalId) && _voteSucceeded(proposalId)) { return ProposalState.Succeeded; } else { return ProposalState.Defeated; } } /** * @dev Part of the Governor Bravo's interface: _"The number of votes required in order for a voter to become a proposer"_. */ function proposalThreshold() public view virtual returns (uint256) { return 0; } /** * @dev See {IGovernor-proposalSnapshot}. */ function proposalSnapshot(uint256 proposalId) public view virtual override returns (uint256) { return _proposals[proposalId].voteStart; } /** * @dev See {IGovernor-proposalDeadline}. */ function proposalDeadline(uint256 proposalId) public view virtual override returns (uint256) { return _proposals[proposalId].voteEnd; } /** * @dev Returns the account that created a given proposal. */ function proposalProposer(uint256 proposalId) public view virtual override returns (address) { return _proposals[proposalId].proposer; } /** * @dev Amount of votes already cast passes the threshold limit. */ function _quorumReached(uint256 proposalId) internal view virtual returns (bool); /** * @dev Is the proposal successful or not. */ function _voteSucceeded(uint256 proposalId) internal view virtual returns (bool); /** * @dev Get the voting weight of `account` at a specific `timepoint`, for a vote as described by `params`. */ function _getVotes(address account, uint256 timepoint, bytes memory params) internal view virtual returns (uint256); /** * @dev Register a vote for `proposalId` by `account` with a given `support`, voting `weight` and voting `params`. * * Note: Support is generic and can represent various things depending on the voting system used. */ function _countVote( uint256 proposalId, address account, uint8 support, uint256 weight, bytes memory params ) internal virtual; /** * @dev Default additional encoded parameters used by castVote methods that don't include them * * Note: Should be overridden by specific implementations to use an appropriate value, the * meaning of the additional params, in the context of that implementation */ function _defaultParams() internal view virtual returns (bytes memory) { return ""; } /** * @dev See {IGovernor-propose}. */ function propose( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, string memory description ) public virtual override returns (uint256) { address proposer = _msgSender(); uint256 currentTimepoint = clock(); require( getVotes(proposer, currentTimepoint - 1) >= proposalThreshold(), "Governor: proposer votes below proposal threshold" ); uint256 proposalId = hashProposal(targets, values, calldatas, keccak256(bytes(description))); require(targets.length == values.length, "Governor: invalid proposal length"); require(targets.length == calldatas.length, "Governor: invalid proposal length"); require(targets.length > 0, "Governor: empty proposal"); require(_proposals[proposalId].voteStart == 0, "Governor: proposal already exists"); uint256 snapshot = currentTimepoint + votingDelay(); uint256 deadline = snapshot + votingPeriod(); _proposals[proposalId] = ProposalCore({ proposer: proposer, voteStart: SafeCast.toUint64(snapshot), voteEnd: SafeCast.toUint64(deadline), executed: false, canceled: false, __gap_unused0: 0, __gap_unused1: 0 }); emit ProposalCreated( proposalId, proposer, targets, values, new string[](targets.length), calldatas, snapshot, deadline, description ); return proposalId; } /** * @dev See {IGovernor-execute}. */ function execute( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public payable virtual override returns (uint256) { uint256 proposalId = hashProposal(targets, values, calldatas, descriptionHash); ProposalState currentState = state(proposalId); require( currentState == ProposalState.Succeeded || currentState == ProposalState.Queued, "Governor: proposal not successful" ); _proposals[proposalId].executed = true; emit ProposalExecuted(proposalId); _beforeExecute(proposalId, targets, values, calldatas, descriptionHash); _execute(proposalId, targets, values, calldatas, descriptionHash); _afterExecute(proposalId, targets, values, calldatas, descriptionHash); return proposalId; } /** * @dev See {IGovernor-cancel}. */ function cancel( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public virtual override returns (uint256) { uint256 proposalId = hashProposal(targets, values, calldatas, descriptionHash); require(state(proposalId) == ProposalState.Pending, "Governor: too late to cancel"); require(_msgSender() == _proposals[proposalId].proposer, "Governor: only proposer can cancel"); return _cancel(targets, values, calldatas, descriptionHash); } /** * @dev Internal execution mechanism. Can be overridden to implement different execution mechanism */ function _execute( uint256 /* proposalId */, address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 /*descriptionHash*/ ) internal virtual { string memory errorMessage = "Governor: call reverted without message"; for (uint256 i = 0; i < targets.length; ++i) { (bool success, bytes memory returndata) = targets[i].call{value: values[i]}(calldatas[i]); Address.verifyCallResult(success, returndata, errorMessage); } } /** * @dev Hook before execution is triggered. */ function _beforeExecute( uint256 /* proposalId */, address[] memory targets, uint256[] memory /* values */, bytes[] memory calldatas, bytes32 /*descriptionHash*/ ) internal virtual { if (_executor() != address(this)) { for (uint256 i = 0; i < targets.length; ++i) { if (targets[i] == address(this)) { _governanceCall.pushBack(keccak256(calldatas[i])); } } } } /** * @dev Hook after execution is triggered. */ function _afterExecute( uint256 /* proposalId */, address[] memory /* targets */, uint256[] memory /* values */, bytes[] memory /* calldatas */, bytes32 /*descriptionHash*/ ) internal virtual { if (_executor() != address(this)) { if (!_governanceCall.empty()) { _governanceCall.clear(); } } } /** * @dev Internal cancel mechanism: locks up the proposal timer, preventing it from being re-submitted. Marks it as * canceled to allow distinguishing it from executed proposals. * * Emits a {IGovernor-ProposalCanceled} event. */ function _cancel( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) internal virtual returns (uint256) { uint256 proposalId = hashProposal(targets, values, calldatas, descriptionHash); ProposalState currentState = state(proposalId); require( currentState != ProposalState.Canceled && currentState != ProposalState.Expired && currentState != ProposalState.Executed, "Governor: proposal not active" ); _proposals[proposalId].canceled = true; emit ProposalCanceled(proposalId); return proposalId; } /** * @dev See {IGovernor-getVotes}. */ function getVotes(address account, uint256 timepoint) public view virtual override returns (uint256) { return _getVotes(account, timepoint, _defaultParams()); } /** * @dev See {IGovernor-getVotesWithParams}. */ function getVotesWithParams( address account, uint256 timepoint, bytes memory params ) public view virtual override returns (uint256) { return _getVotes(account, timepoint, params); } /** * @dev See {IGovernor-castVote}. */ function castVote(uint256 proposalId, uint8 support) public virtual override returns (uint256) { address voter = _msgSender(); return _castVote(proposalId, voter, support, ""); } /** * @dev See {IGovernor-castVoteWithReason}. */ function castVoteWithReason( uint256 proposalId, uint8 support, string calldata reason ) public virtual override returns (uint256) { address voter = _msgSender(); return _castVote(proposalId, voter, support, reason); } /** * @dev See {IGovernor-castVoteWithReasonAndParams}. */ function castVoteWithReasonAndParams( uint256 proposalId, uint8 support, string calldata reason, bytes memory params ) public virtual override returns (uint256) { address voter = _msgSender(); return _castVote(proposalId, voter, support, reason, params); } /** * @dev See {IGovernor-castVoteBySig}. */ function castVoteBySig( uint256 proposalId, uint8 support, uint8 v, bytes32 r, bytes32 s ) public virtual override returns (uint256) { address voter = ECDSA.recover( _hashTypedDataV4(keccak256(abi.encode(BALLOT_TYPEHASH, proposalId, support))), v, r, s ); return _castVote(proposalId, voter, support, ""); } /** * @dev See {IGovernor-castVoteWithReasonAndParamsBySig}. */ function castVoteWithReasonAndParamsBySig( uint256 proposalId, uint8 support, string calldata reason, bytes memory params, uint8 v, bytes32 r, bytes32 s ) public virtual override returns (uint256) { address voter = ECDSA.recover( _hashTypedDataV4( keccak256( abi.encode( EXTENDED_BALLOT_TYPEHASH, proposalId, support, keccak256(bytes(reason)), keccak256(params) ) ) ), v, r, s ); return _castVote(proposalId, voter, support, reason, params); } /** * @dev Internal vote casting mechanism: Check that the vote is pending, that it has not been cast yet, retrieve * voting weight using {IGovernor-getVotes} and call the {_countVote} internal function. Uses the _defaultParams(). * * Emits a {IGovernor-VoteCast} event. */ function _castVote( uint256 proposalId, address account, uint8 support, string memory reason ) internal virtual returns (uint256) { return _castVote(proposalId, account, support, reason, _defaultParams()); } /** * @dev Internal vote casting mechanism: Check that the vote is pending, that it has not been cast yet, retrieve * voting weight using {IGovernor-getVotes} and call the {_countVote} internal function. * * Emits a {IGovernor-VoteCast} event. */ function _castVote( uint256 proposalId, address account, uint8 support, string memory reason, bytes memory params ) internal virtual returns (uint256) { ProposalCore storage proposal = _proposals[proposalId]; require(state(proposalId) == ProposalState.Active, "Governor: vote not currently active"); uint256 weight = _getVotes(account, proposal.voteStart, params); _countVote(proposalId, account, support, weight, params); if (params.length == 0) { emit VoteCast(account, proposalId, support, weight, reason); } else { emit VoteCastWithParams(account, proposalId, support, weight, reason, params); } return weight; } /** * @dev Relays a transaction or function call to an arbitrary target. In cases where the governance executor * is some contract other than the governor itself, like when using a timelock, this function can be invoked * in a governance proposal to recover tokens or Ether that was sent to the governor contract by mistake. * Note that if the executor is simply the governor itself, use of `relay` is redundant. */ function relay(address target, uint256 value, bytes calldata data) external payable virtual onlyGovernance { (bool success, bytes memory returndata) = target.call{value: value}(data); Address.verifyCallResult(success, returndata, "Governor: relay reverted without message"); } /** * @dev Address through which the governor executes action. Will be overloaded by module that execute actions * through another contract such as a timelock. */ function _executor() internal view virtual returns (address) { return address(this); } /** * @dev See {IERC721Receiver-onERC721Received}. */ function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) { return this.onERC721Received.selector; } /** * @dev See {IERC1155Receiver-onERC1155Received}. */ function onERC1155Received( address, address, uint256, uint256, bytes memory ) public virtual override returns (bytes4) { return this.onERC1155Received.selector; } /** * @dev See {IERC1155Receiver-onERC1155BatchReceived}. */ function onERC1155BatchReceived( address, address, uint256[] memory, uint256[] memory, bytes memory ) public virtual override returns (bytes4) { return this.onERC1155BatchReceived.selector; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (governance/IGovernor.sol) pragma solidity ^0.8.0; import "../interfaces/IERC165.sol"; import "../interfaces/IERC6372.sol"; /** * @dev Interface of the {Governor} core. * * _Available since v4.3._ */ abstract contract IGovernor is IERC165, IERC6372 { enum ProposalState { Pending, Active, Canceled, Defeated, Succeeded, Queued, Expired, Executed } /** * @dev Emitted when a proposal is created. */ event ProposalCreated( uint256 proposalId, address proposer, address[] targets, uint256[] values, string[] signatures, bytes[] calldatas, uint256 voteStart, uint256 voteEnd, string description ); /** * @dev Emitted when a proposal is canceled. */ event ProposalCanceled(uint256 proposalId); /** * @dev Emitted when a proposal is executed. */ event ProposalExecuted(uint256 proposalId); /** * @dev Emitted when a vote is cast without params. * * Note: `support` values should be seen as buckets. Their interpretation depends on the voting module used. */ event VoteCast(address indexed voter, uint256 proposalId, uint8 support, uint256 weight, string reason); /** * @dev Emitted when a vote is cast with params. * * Note: `support` values should be seen as buckets. Their interpretation depends on the voting module used. * `params` are additional encoded parameters. Their interpepretation also depends on the voting module used. */ event VoteCastWithParams( address indexed voter, uint256 proposalId, uint8 support, uint256 weight, string reason, bytes params ); /** * @notice module:core * @dev Name of the governor instance (used in building the ERC712 domain separator). */ function name() public view virtual returns (string memory); /** * @notice module:core * @dev Version of the governor instance (used in building the ERC712 domain separator). Default: "1" */ function version() public view virtual returns (string memory); /** * @notice module:core * @dev See {IERC6372} */ function clock() public view virtual override returns (uint48); /** * @notice module:core * @dev See EIP-6372. */ // solhint-disable-next-line func-name-mixedcase function CLOCK_MODE() public view virtual override returns (string memory); /** * @notice module:voting * @dev A description of the possible `support` values for {castVote} and the way these votes are counted, meant to * be consumed by UIs to show correct vote options and interpret the results. The string is a URL-encoded sequence of * key-value pairs that each describe one aspect, for example `support=bravo&quorum=for,abstain`. * * There are 2 standard keys: `support` and `quorum`. * * - `support=bravo` refers to the vote options 0 = Against, 1 = For, 2 = Abstain, as in `GovernorBravo`. * - `quorum=bravo` means that only For votes are counted towards quorum. * - `quorum=for,abstain` means that both For and Abstain votes are counted towards quorum. * * If a counting module makes use of encoded `params`, it should include this under a `params` key with a unique * name that describes the behavior. For example: * * - `params=fractional` might refer to a scheme where votes are divided fractionally between for/against/abstain. * - `params=erc721` might refer to a scheme where specific NFTs are delegated to vote. * * NOTE: The string can be decoded by the standard * https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams[`URLSearchParams`] * JavaScript class. */ // solhint-disable-next-line func-name-mixedcase function COUNTING_MODE() public view virtual returns (string memory); /** * @notice module:core * @dev Hashing function used to (re)build the proposal id from the proposal details.. */ function hashProposal( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public pure virtual returns (uint256); /** * @notice module:core * @dev Current state of a proposal, following Compound's convention */ function state(uint256 proposalId) public view virtual returns (ProposalState); /** * @notice module:core * @dev Timepoint used to retrieve user's votes and quorum. If using block number (as per Compound's Comp), the * snapshot is performed at the end of this block. Hence, voting for this proposal starts at the beginning of the * following block. */ function proposalSnapshot(uint256 proposalId) public view virtual returns (uint256); /** * @notice module:core * @dev Timepoint at which votes close. If using block number, votes close at the end of this block, so it is * possible to cast a vote during this block. */ function proposalDeadline(uint256 proposalId) public view virtual returns (uint256); /** * @notice module:core * @dev The account that created a proposal. */ function proposalProposer(uint256 proposalId) public view virtual returns (address); /** * @notice module:user-config * @dev Delay, between the proposal is created and the vote starts. The unit this duration is expressed in depends * on the clock (see EIP-6372) this contract uses. * * This can be increased to leave time for users to buy voting power, or delegate it, before the voting of a * proposal starts. */ function votingDelay() public view virtual returns (uint256); /** * @notice module:user-config * @dev Delay between the vote start and vote end. The unit this duration is expressed in depends on the clock * (see EIP-6372) this contract uses. * * NOTE: The {votingDelay} can delay the start of the vote. This must be considered when setting the voting * duration compared to the voting delay. */ function votingPeriod() public view virtual returns (uint256); /** * @notice module:user-config * @dev Minimum number of cast voted required for a proposal to be successful. * * NOTE: The `timepoint` parameter corresponds to the snapshot used for counting vote. This allows to scale the * quorum depending on values such as the totalSupply of a token at this timepoint (see {ERC20Votes}). */ function quorum(uint256 timepoint) public view virtual returns (uint256); /** * @notice module:reputation * @dev Voting power of an `account` at a specific `timepoint`. * * Note: this can be implemented in a number of ways, for example by reading the delegated balance from one (or * multiple), {ERC20Votes} tokens. */ function getVotes(address account, uint256 timepoint) public view virtual returns (uint256); /** * @notice module:reputation * @dev Voting power of an `account` at a specific `timepoint` given additional encoded parameters. */ function getVotesWithParams( address account, uint256 timepoint, bytes memory params ) public view virtual returns (uint256); /** * @notice module:voting * @dev Returns whether `account` has cast a vote on `proposalId`. */ function hasVoted(uint256 proposalId, address account) public view virtual returns (bool); /** * @dev Create a new proposal. Vote start after a delay specified by {IGovernor-votingDelay} and lasts for a * duration specified by {IGovernor-votingPeriod}. * * Emits a {ProposalCreated} event. */ function propose( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, string memory description ) public virtual returns (uint256 proposalId); /** * @dev Execute a successful proposal. This requires the quorum to be reached, the vote to be successful, and the * deadline to be reached. * * Emits a {ProposalExecuted} event. * * Note: some module can modify the requirements for execution, for example by adding an additional timelock. */ function execute( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public payable virtual returns (uint256 proposalId); /** * @dev Cancel a proposal. A proposal is cancellable by the proposer, but only while it is Pending state, i.e. * before the vote starts. * * Emits a {ProposalCanceled} event. */ function cancel( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public virtual returns (uint256 proposalId); /** * @dev Cast a vote * * Emits a {VoteCast} event. */ function castVote(uint256 proposalId, uint8 support) public virtual returns (uint256 balance); /** * @dev Cast a vote with a reason * * Emits a {VoteCast} event. */ function castVoteWithReason( uint256 proposalId, uint8 support, string calldata reason ) public virtual returns (uint256 balance); /** * @dev Cast a vote with a reason and additional encoded parameters * * Emits a {VoteCast} or {VoteCastWithParams} event depending on the length of params. */ function castVoteWithReasonAndParams( uint256 proposalId, uint8 support, string calldata reason, bytes memory params ) public virtual returns (uint256 balance); /** * @dev Cast a vote using the user's cryptographic signature. * * Emits a {VoteCast} event. */ function castVoteBySig( uint256 proposalId, uint8 support, uint8 v, bytes32 r, bytes32 s ) public virtual returns (uint256 balance); /** * @dev Cast a vote with a reason and additional encoded parameters using the user's cryptographic signature. * * Emits a {VoteCast} or {VoteCastWithParams} event depending on the length of params. */ function castVoteWithReasonAndParamsBySig( uint256 proposalId, uint8 support, string calldata reason, bytes memory params, uint8 v, bytes32 r, bytes32 s ) public virtual returns (uint256 balance); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (governance/TimelockController.sol) pragma solidity ^0.8.0; import "../access/AccessControl.sol"; import "../token/ERC721/IERC721Receiver.sol"; import "../token/ERC1155/IERC1155Receiver.sol"; /** * @dev Contract module which acts as a timelocked controller. When set as the * owner of an `Ownable` smart contract, it enforces a timelock on all * `onlyOwner` maintenance operations. This gives time for users of the * controlled contract to exit before a potentially dangerous maintenance * operation is applied. * * By default, this contract is self administered, meaning administration tasks * have to go through the timelock process. The proposer (resp executor) role * is in charge of proposing (resp executing) operations. A common use case is * to position this {TimelockController} as the owner of a smart contract, with * a multisig or a DAO as the sole proposer. * * _Available since v3.3._ */ contract TimelockController is AccessControl, IERC721Receiver, IERC1155Receiver { bytes32 public constant TIMELOCK_ADMIN_ROLE = keccak256("TIMELOCK_ADMIN_ROLE"); bytes32 public constant PROPOSER_ROLE = keccak256("PROPOSER_ROLE"); bytes32 public constant EXECUTOR_ROLE = keccak256("EXECUTOR_ROLE"); bytes32 public constant CANCELLER_ROLE = keccak256("CANCELLER_ROLE"); uint256 internal constant _DONE_TIMESTAMP = uint256(1); mapping(bytes32 => uint256) private _timestamps; uint256 private _minDelay; /** * @dev Emitted when a call is scheduled as part of operation `id`. */ event CallScheduled( bytes32 indexed id, uint256 indexed index, address target, uint256 value, bytes data, bytes32 predecessor, uint256 delay ); /** * @dev Emitted when a call is performed as part of operation `id`. */ event CallExecuted(bytes32 indexed id, uint256 indexed index, address target, uint256 value, bytes data); /** * @dev Emitted when new proposal is scheduled with non-zero salt. */ event CallSalt(bytes32 indexed id, bytes32 salt); /** * @dev Emitted when operation `id` is cancelled. */ event Cancelled(bytes32 indexed id); /** * @dev Emitted when the minimum delay for future operations is modified. */ event MinDelayChange(uint256 oldDuration, uint256 newDuration); /** * @dev Initializes the contract with the following parameters: * * - `minDelay`: initial minimum delay for operations * - `proposers`: accounts to be granted proposer and canceller roles * - `executors`: accounts to be granted executor role * - `admin`: optional account to be granted admin role; disable with zero address * * IMPORTANT: The optional admin can aid with initial configuration of roles after deployment * without being subject to delay, but this role should be subsequently renounced in favor of * administration through timelocked proposals. Previous versions of this contract would assign * this admin to the deployer automatically and should be renounced as well. */ constructor(uint256 minDelay, address[] memory proposers, address[] memory executors, address admin) { _setRoleAdmin(TIMELOCK_ADMIN_ROLE, TIMELOCK_ADMIN_ROLE); _setRoleAdmin(PROPOSER_ROLE, TIMELOCK_ADMIN_ROLE); _setRoleAdmin(EXECUTOR_ROLE, TIMELOCK_ADMIN_ROLE); _setRoleAdmin(CANCELLER_ROLE, TIMELOCK_ADMIN_ROLE); // self administration _setupRole(TIMELOCK_ADMIN_ROLE, address(this)); // optional admin if (admin != address(0)) { _setupRole(TIMELOCK_ADMIN_ROLE, admin); } // register proposers and cancellers for (uint256 i = 0; i < proposers.length; ++i) { _setupRole(PROPOSER_ROLE, proposers[i]); _setupRole(CANCELLER_ROLE, proposers[i]); } // register executors for (uint256 i = 0; i < executors.length; ++i) { _setupRole(EXECUTOR_ROLE, executors[i]); } _minDelay = minDelay; emit MinDelayChange(0, minDelay); } /** * @dev Modifier to make a function callable only by a certain role. In * addition to checking the sender's role, `address(0)` 's role is also * considered. Granting a role to `address(0)` is equivalent to enabling * this role for everyone. */ modifier onlyRoleOrOpenRole(bytes32 role) { if (!hasRole(role, address(0))) { _checkRole(role, _msgSender()); } _; } /** * @dev Contract might receive/hold ETH as part of the maintenance process. */ receive() external payable {} /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, AccessControl) returns (bool) { return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns whether an id correspond to a registered operation. This * includes both Pending, Ready and Done operations. */ function isOperation(bytes32 id) public view virtual returns (bool) { return getTimestamp(id) > 0; } /** * @dev Returns whether an operation is pending or not. Note that a "pending" operation may also be "ready". */ function isOperationPending(bytes32 id) public view virtual returns (bool) { return getTimestamp(id) > _DONE_TIMESTAMP; } /** * @dev Returns whether an operation is ready for execution. Note that a "ready" operation is also "pending". */ function isOperationReady(bytes32 id) public view virtual returns (bool) { uint256 timestamp = getTimestamp(id); return timestamp > _DONE_TIMESTAMP && timestamp <= block.timestamp; } /** * @dev Returns whether an operation is done or not. */ function isOperationDone(bytes32 id) public view virtual returns (bool) { return getTimestamp(id) == _DONE_TIMESTAMP; } /** * @dev Returns the timestamp at which an operation becomes ready (0 for * unset operations, 1 for done operations). */ function getTimestamp(bytes32 id) public view virtual returns (uint256) { return _timestamps[id]; } /** * @dev Returns the minimum delay for an operation to become valid. * * This value can be changed by executing an operation that calls `updateDelay`. */ function getMinDelay() public view virtual returns (uint256) { return _minDelay; } /** * @dev Returns the identifier of an operation containing a single * transaction. */ function hashOperation( address target, uint256 value, bytes calldata data, bytes32 predecessor, bytes32 salt ) public pure virtual returns (bytes32) { return keccak256(abi.encode(target, value, data, predecessor, salt)); } /** * @dev Returns the identifier of an operation containing a batch of * transactions. */ function hashOperationBatch( address[] calldata targets, uint256[] calldata values, bytes[] calldata payloads, bytes32 predecessor, bytes32 salt ) public pure virtual returns (bytes32) { return keccak256(abi.encode(targets, values, payloads, predecessor, salt)); } /** * @dev Schedule an operation containing a single transaction. * * Emits {CallSalt} if salt is nonzero, and {CallScheduled}. * * Requirements: * * - the caller must have the 'proposer' role. */ function schedule( address target, uint256 value, bytes calldata data, bytes32 predecessor, bytes32 salt, uint256 delay ) public virtual onlyRole(PROPOSER_ROLE) { bytes32 id = hashOperation(target, value, data, predecessor, salt); _schedule(id, delay); emit CallScheduled(id, 0, target, value, data, predecessor, delay); if (salt != bytes32(0)) { emit CallSalt(id, salt); } } /** * @dev Schedule an operation containing a batch of transactions. * * Emits {CallSalt} if salt is nonzero, and one {CallScheduled} event per transaction in the batch. * * Requirements: * * - the caller must have the 'proposer' role. */ function scheduleBatch( address[] calldata targets, uint256[] calldata values, bytes[] calldata payloads, bytes32 predecessor, bytes32 salt, uint256 delay ) public virtual onlyRole(PROPOSER_ROLE) { require(targets.length == values.length, "TimelockController: length mismatch"); require(targets.length == payloads.length, "TimelockController: length mismatch"); bytes32 id = hashOperationBatch(targets, values, payloads, predecessor, salt); _schedule(id, delay); for (uint256 i = 0; i < targets.length; ++i) { emit CallScheduled(id, i, targets[i], values[i], payloads[i], predecessor, delay); } if (salt != bytes32(0)) { emit CallSalt(id, salt); } } /** * @dev Schedule an operation that is to become valid after a given delay. */ function _schedule(bytes32 id, uint256 delay) private { require(!isOperation(id), "TimelockController: operation already scheduled"); require(delay >= getMinDelay(), "TimelockController: insufficient delay"); _timestamps[id] = block.timestamp + delay; } /** * @dev Cancel an operation. * * Requirements: * * - the caller must have the 'canceller' role. */ function cancel(bytes32 id) public virtual onlyRole(CANCELLER_ROLE) { require(isOperationPending(id), "TimelockController: operation cannot be cancelled"); delete _timestamps[id]; emit Cancelled(id); } /** * @dev Execute an (ready) operation containing a single transaction. * * Emits a {CallExecuted} event. * * Requirements: * * - the caller must have the 'executor' role. */ // This function can reenter, but it doesn't pose a risk because _afterCall checks that the proposal is pending, // thus any modifications to the operation during reentrancy should be caught. // slither-disable-next-line reentrancy-eth function execute( address target, uint256 value, bytes calldata payload, bytes32 predecessor, bytes32 salt ) public payable virtual onlyRoleOrOpenRole(EXECUTOR_ROLE) { bytes32 id = hashOperation(target, value, payload, predecessor, salt); _beforeCall(id, predecessor); _execute(target, value, payload); emit CallExecuted(id, 0, target, value, payload); _afterCall(id); } /** * @dev Execute an (ready) operation containing a batch of transactions. * * Emits one {CallExecuted} event per transaction in the batch. * * Requirements: * * - the caller must have the 'executor' role. */ // This function can reenter, but it doesn't pose a risk because _afterCall checks that the proposal is pending, // thus any modifications to the operation during reentrancy should be caught. // slither-disable-next-line reentrancy-eth function executeBatch( address[] calldata targets, uint256[] calldata values, bytes[] calldata payloads, bytes32 predecessor, bytes32 salt ) public payable virtual onlyRoleOrOpenRole(EXECUTOR_ROLE) { require(targets.length == values.length, "TimelockController: length mismatch"); require(targets.length == payloads.length, "TimelockController: length mismatch"); bytes32 id = hashOperationBatch(targets, values, payloads, predecessor, salt); _beforeCall(id, predecessor); for (uint256 i = 0; i < targets.length; ++i) { address target = targets[i]; uint256 value = values[i]; bytes calldata payload = payloads[i]; _execute(target, value, payload); emit CallExecuted(id, i, target, value, payload); } _afterCall(id); } /** * @dev Execute an operation's call. */ function _execute(address target, uint256 value, bytes calldata data) internal virtual { (bool success, ) = target.call{value: value}(data); require(success, "TimelockController: underlying transaction reverted"); } /** * @dev Checks before execution of an operation's calls. */ function _beforeCall(bytes32 id, bytes32 predecessor) private view { require(isOperationReady(id), "TimelockController: operation is not ready"); require(predecessor == bytes32(0) || isOperationDone(predecessor), "TimelockController: missing dependency"); } /** * @dev Checks after execution of an operation's calls. */ function _afterCall(bytes32 id) private { require(isOperationReady(id), "TimelockController: operation is not ready"); _timestamps[id] = _DONE_TIMESTAMP; } /** * @dev Changes the minimum timelock duration for future operations. * * Emits a {MinDelayChange} event. * * Requirements: * * - the caller must be the timelock itself. This can only be achieved by scheduling and later executing * an operation where the timelock is the target and the data is the ABI-encoded call to this function. */ function updateDelay(uint256 newDelay) external virtual { require(msg.sender == address(this), "TimelockController: caller must be timelock"); emit MinDelayChange(_minDelay, newDelay); _minDelay = newDelay; } /** * @dev See {IERC721Receiver-onERC721Received}. */ function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) { return this.onERC721Received.selector; } /** * @dev See {IERC1155Receiver-onERC1155Received}. */ function onERC1155Received( address, address, uint256, uint256, bytes memory ) public virtual override returns (bytes4) { return this.onERC1155Received.selector; } /** * @dev See {IERC1155Receiver-onERC1155BatchReceived}. */ function onERC1155BatchReceived( address, address, uint256[] memory, uint256[] memory, bytes memory ) public virtual override returns (bytes4) { return this.onERC1155BatchReceived.selector; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (governance/extensions/GovernorSettings.sol) pragma solidity ^0.8.0; import "../Governor.sol"; /** * @dev Extension of {Governor} for settings updatable through governance. * * _Available since v4.4._ */ abstract contract GovernorSettings is Governor { uint256 private _votingDelay; uint256 private _votingPeriod; uint256 private _proposalThreshold; event VotingDelaySet(uint256 oldVotingDelay, uint256 newVotingDelay); event VotingPeriodSet(uint256 oldVotingPeriod, uint256 newVotingPeriod); event ProposalThresholdSet(uint256 oldProposalThreshold, uint256 newProposalThreshold); /** * @dev Initialize the governance parameters. */ constructor(uint256 initialVotingDelay, uint256 initialVotingPeriod, uint256 initialProposalThreshold) { _setVotingDelay(initialVotingDelay); _setVotingPeriod(initialVotingPeriod); _setProposalThreshold(initialProposalThreshold); } /** * @dev See {IGovernor-votingDelay}. */ function votingDelay() public view virtual override returns (uint256) { return _votingDelay; } /** * @dev See {IGovernor-votingPeriod}. */ function votingPeriod() public view virtual override returns (uint256) { return _votingPeriod; } /** * @dev See {Governor-proposalThreshold}. */ function proposalThreshold() public view virtual override returns (uint256) { return _proposalThreshold; } /** * @dev Update the voting delay. This operation can only be performed through a governance proposal. * * Emits a {VotingDelaySet} event. */ function setVotingDelay(uint256 newVotingDelay) public virtual onlyGovernance { _setVotingDelay(newVotingDelay); } /** * @dev Update the voting period. This operation can only be performed through a governance proposal. * * Emits a {VotingPeriodSet} event. */ function setVotingPeriod(uint256 newVotingPeriod) public virtual onlyGovernance { _setVotingPeriod(newVotingPeriod); } /** * @dev Update the proposal threshold. This operation can only be performed through a governance proposal. * * Emits a {ProposalThresholdSet} event. */ function setProposalThreshold(uint256 newProposalThreshold) public virtual onlyGovernance { _setProposalThreshold(newProposalThreshold); } /** * @dev Internal setter for the voting delay. * * Emits a {VotingDelaySet} event. */ function _setVotingDelay(uint256 newVotingDelay) internal virtual { emit VotingDelaySet(_votingDelay, newVotingDelay); _votingDelay = newVotingDelay; } /** * @dev Internal setter for the voting period. * * Emits a {VotingPeriodSet} event. */ function _setVotingPeriod(uint256 newVotingPeriod) internal virtual { // voting period must be at least one block long require(newVotingPeriod > 0, "GovernorSettings: voting period too low"); emit VotingPeriodSet(_votingPeriod, newVotingPeriod); _votingPeriod = newVotingPeriod; } /** * @dev Internal setter for the proposal threshold. * * Emits a {ProposalThresholdSet} event. */ function _setProposalThreshold(uint256 newProposalThreshold) internal virtual { emit ProposalThresholdSet(_proposalThreshold, newProposalThreshold); _proposalThreshold = newProposalThreshold; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (governance/extensions/GovernorVotes.sol) pragma solidity ^0.8.0; import "../Governor.sol"; import "../../interfaces/IERC5805.sol"; /** * @dev Extension of {Governor} for voting weight extraction from an {ERC20Votes} token, or since v4.5 an {ERC721Votes} token. * * _Available since v4.3._ */ abstract contract GovernorVotes is Governor { IERC5805 public immutable token; constructor(IVotes tokenAddress) { token = IERC5805(address(tokenAddress)); } /** * @dev Clock (as specified in EIP-6372) is set to match the token's clock. Fallback to block numbers if the token * does not implement EIP-6372. */ function clock() public view virtual override returns (uint48) { try token.clock() returns (uint48 timepoint) { return timepoint; } catch { return SafeCast.toUint48(block.number); } } /** * @dev Machine-readable description of the clock as specified in EIP-6372. */ // solhint-disable-next-line func-name-mixedcase function CLOCK_MODE() public view virtual override returns (string memory) { try token.CLOCK_MODE() returns (string memory clockmode) { return clockmode; } catch { return "mode=blocknumber&from=default"; } } /** * Read the voting weight from the token's built in snapshot mechanism (see {Governor-_getVotes}). */ function _getVotes( address account, uint256 timepoint, bytes memory /*params*/ ) internal view virtual override returns (uint256) { return token.getPastVotes(account, timepoint); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (governance/extensions/IGovernorTimelock.sol) pragma solidity ^0.8.0; import "../IGovernor.sol"; /** * @dev Extension of the {IGovernor} for timelock supporting modules. * * _Available since v4.3._ */ abstract contract IGovernorTimelock is IGovernor { event ProposalQueued(uint256 proposalId, uint256 eta); function timelock() public view virtual returns (address); function proposalEta(uint256 proposalId) public view virtual returns (uint256); function queue( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public virtual returns (uint256 proposalId); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (governance/utils/IVotes.sol) pragma solidity ^0.8.0; /** * @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts. * * _Available since v4.5._ */ interface IVotes { /** * @dev Emitted when an account changes their delegate. */ event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /** * @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes. */ event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance); /** * @dev Returns the current amount of votes that `account` has. */ function getVotes(address account) external view returns (uint256); /** * @dev Returns the amount of votes that `account` had at a specific moment in the past. If the `clock()` is * configured to use block numbers, this will return the value at the end of the corresponding block. */ function getPastVotes(address account, uint256 timepoint) external view returns (uint256); /** * @dev Returns the total supply of votes available at a specific moment in the past. If the `clock()` is * configured to use block numbers, this will return the value at the end of the corresponding block. * * NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes. * Votes that have not been delegated are still part of total supply, even though they would not participate in a * vote. */ function getPastTotalSupply(uint256 timepoint) external view returns (uint256); /** * @dev Returns the delegate that `account` has chosen. */ function delegates(address account) external view returns (address); /** * @dev Delegates votes from the sender to `delegatee`. */ function delegate(address delegatee) external; /** * @dev Delegates votes from signer to `delegatee`. */ function delegateBySig(address delegatee, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol) pragma solidity ^0.8.0; 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 v4.9.0) (interfaces/IERC5805.sol) pragma solidity ^0.8.0; import "../governance/utils/IVotes.sol"; import "./IERC6372.sol"; interface IERC5805 is IERC6372, IVotes {}
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC6372.sol) pragma solidity ^0.8.0; interface IERC6372 { /** * @dev Clock used for flagging checkpoints. Can be overridden to implement timestamp based checkpoints (and voting). */ function clock() external view returns (uint48); /** * @dev Description of the clock */ // solhint-disable-next-line func-name-mixedcase function CLOCK_MODE() external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev _Available since v3.1._ */ interface IERC1155Receiver is IERC165 { /** * @dev Handles the receipt of a single ERC1155 token type. This function is * called at the end of a `safeTransferFrom` after the balance has been updated. * * NOTE: To accept the transfer, this must return * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` * (i.e. 0xf23a6e61, or its own function selector). * * @param operator The address which initiated the transfer (i.e. msg.sender) * @param from The address which previously owned the token * @param id The ID of the token being transferred * @param value The amount of tokens being transferred * @param data Additional data with no specified format * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed */ function onERC1155Received( address operator, address from, uint256 id, uint256 value, bytes calldata data ) external returns (bytes4); /** * @dev Handles the receipt of a multiple ERC1155 token types. This function * is called at the end of a `safeBatchTransferFrom` after the balances have * been updated. * * NOTE: To accept the transfer(s), this must return * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` * (i.e. 0xbc197c81, or its own function selector). * * @param operator The address which initiated the batch transfer (i.e. msg.sender) * @param from The address which previously owned the token * @param ids An array containing ids of each token being transferred (order and length must match values array) * @param values An array containing amounts of each token being transferred (order and length must match ids array) * @param data Additional data with no specified format * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed */ function onERC1155BatchReceived( address operator, address from, uint256[] calldata ids, uint256[] calldata values, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @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 `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [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://consensys.net/diligence/blog/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/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @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 Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol) pragma solidity ^0.8.8; import "./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 v4.9.0) (utils/StorageSlot.sol) // This file was procedurally generated from scripts/generate/templates/StorageSlot.js. pragma solidity ^0.8.0; /** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ```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(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` * * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._ * _Available since v4.9 for `string`, `bytes`._ */ 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 v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @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), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(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) { 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] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); 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 keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @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, InvalidSignatureV // Deprecated in v4.8 } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode 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 {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] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { 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); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode 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 {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); 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] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); 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. * * _Available since v4.2._ */ function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) { // 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); } // 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); } return (signer, RecoverError.NoError); } /** * @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) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) { // 32 is the length in bytes of hash, // enforced by the type signature above /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") mstore(0x1c, hash) message := keccak256(0x00, 0x3c) } } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, "\x19\x01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) data := keccak256(ptr, 0x42) } } /** * @dev Returns an Ethereum Signed Data with intended validator, created from a * `validator` and `data` according to the version 0 of EIP-191. * * See {recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x00", validator, data)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol) pragma solidity ^0.8.8; import "./ECDSA.sol"; import "../ShortStrings.sol"; import "../../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 specified in the EIP is very generic, and such a generic 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 their contracts 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. * * _Available since v3.4._ * * @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment */ 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 ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } /** * @dev See {EIP-5267}. * * _Available since v4.9._ */ function eip712Domain() public view virtual override returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ) { return ( hex"0f", // 01111 _name.toStringWithFallback(_nameFallback), _version.toStringWithFallback(_versionFallback), block.chainid, address(this), bytes32(0), new uint256[](0) ); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @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 up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (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; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) 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. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 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. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); 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 (rounding == Rounding.Up && 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 down. * * 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 + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * 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 + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * 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 + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * 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 + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol) // This file was procedurally generated from scripts/generate/templates/SafeCast.js. pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. * * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing * all math on `uint256` and `int256` and then downcasting. */ library SafeCast { /** * @dev Returns the downcasted uint248 from uint256, reverting on * overflow (when the input is greater than largest uint248). * * Counterpart to Solidity's `uint248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toUint248(uint256 value) internal pure returns (uint248) { require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits"); return uint248(value); } /** * @dev Returns the downcasted uint240 from uint256, reverting on * overflow (when the input is greater than largest uint240). * * Counterpart to Solidity's `uint240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toUint240(uint256 value) internal pure returns (uint240) { require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits"); return uint240(value); } /** * @dev Returns the downcasted uint232 from uint256, reverting on * overflow (when the input is greater than largest uint232). * * Counterpart to Solidity's `uint232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toUint232(uint256 value) internal pure returns (uint232) { require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits"); return uint232(value); } /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.2._ */ function toUint224(uint256 value) internal pure returns (uint224) { require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits"); return uint224(value); } /** * @dev Returns the downcasted uint216 from uint256, reverting on * overflow (when the input is greater than largest uint216). * * Counterpart to Solidity's `uint216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toUint216(uint256 value) internal pure returns (uint216) { require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits"); return uint216(value); } /** * @dev Returns the downcasted uint208 from uint256, reverting on * overflow (when the input is greater than largest uint208). * * Counterpart to Solidity's `uint208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toUint208(uint256 value) internal pure returns (uint208) { require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits"); return uint208(value); } /** * @dev Returns the downcasted uint200 from uint256, reverting on * overflow (when the input is greater than largest uint200). * * Counterpart to Solidity's `uint200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toUint200(uint256 value) internal pure returns (uint200) { require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits"); return uint200(value); } /** * @dev Returns the downcasted uint192 from uint256, reverting on * overflow (when the input is greater than largest uint192). * * Counterpart to Solidity's `uint192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toUint192(uint256 value) internal pure returns (uint192) { require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits"); return uint192(value); } /** * @dev Returns the downcasted uint184 from uint256, reverting on * overflow (when the input is greater than largest uint184). * * Counterpart to Solidity's `uint184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toUint184(uint256 value) internal pure returns (uint184) { require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits"); return uint184(value); } /** * @dev Returns the downcasted uint176 from uint256, reverting on * overflow (when the input is greater than largest uint176). * * Counterpart to Solidity's `uint176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toUint176(uint256 value) internal pure returns (uint176) { require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits"); return uint176(value); } /** * @dev Returns the downcasted uint168 from uint256, reverting on * overflow (when the input is greater than largest uint168). * * Counterpart to Solidity's `uint168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toUint168(uint256 value) internal pure returns (uint168) { require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits"); return uint168(value); } /** * @dev Returns the downcasted uint160 from uint256, reverting on * overflow (when the input is greater than largest uint160). * * Counterpart to Solidity's `uint160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toUint160(uint256 value) internal pure returns (uint160) { require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits"); return uint160(value); } /** * @dev Returns the downcasted uint152 from uint256, reverting on * overflow (when the input is greater than largest uint152). * * Counterpart to Solidity's `uint152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toUint152(uint256 value) internal pure returns (uint152) { require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits"); return uint152(value); } /** * @dev Returns the downcasted uint144 from uint256, reverting on * overflow (when the input is greater than largest uint144). * * Counterpart to Solidity's `uint144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toUint144(uint256 value) internal pure returns (uint144) { require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits"); return uint144(value); } /** * @dev Returns the downcasted uint136 from uint256, reverting on * overflow (when the input is greater than largest uint136). * * Counterpart to Solidity's `uint136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toUint136(uint256 value) internal pure returns (uint136) { require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits"); return uint136(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v2.5._ */ function toUint128(uint256 value) internal pure returns (uint128) { require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint120 from uint256, reverting on * overflow (when the input is greater than largest uint120). * * Counterpart to Solidity's `uint120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toUint120(uint256 value) internal pure returns (uint120) { require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits"); return uint120(value); } /** * @dev Returns the downcasted uint112 from uint256, reverting on * overflow (when the input is greater than largest uint112). * * Counterpart to Solidity's `uint112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toUint112(uint256 value) internal pure returns (uint112) { require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits"); return uint112(value); } /** * @dev Returns the downcasted uint104 from uint256, reverting on * overflow (when the input is greater than largest uint104). * * Counterpart to Solidity's `uint104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toUint104(uint256 value) internal pure returns (uint104) { require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits"); return uint104(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.2._ */ function toUint96(uint256 value) internal pure returns (uint96) { require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits"); return uint96(value); } /** * @dev Returns the downcasted uint88 from uint256, reverting on * overflow (when the input is greater than largest uint88). * * Counterpart to Solidity's `uint88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toUint88(uint256 value) internal pure returns (uint88) { require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits"); return uint88(value); } /** * @dev Returns the downcasted uint80 from uint256, reverting on * overflow (when the input is greater than largest uint80). * * Counterpart to Solidity's `uint80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toUint80(uint256 value) internal pure returns (uint80) { require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits"); return uint80(value); } /** * @dev Returns the downcasted uint72 from uint256, reverting on * overflow (when the input is greater than largest uint72). * * Counterpart to Solidity's `uint72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toUint72(uint256 value) internal pure returns (uint72) { require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits"); return uint72(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v2.5._ */ function toUint64(uint256 value) internal pure returns (uint64) { require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint56 from uint256, reverting on * overflow (when the input is greater than largest uint56). * * Counterpart to Solidity's `uint56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toUint56(uint256 value) internal pure returns (uint56) { require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits"); return uint56(value); } /** * @dev Returns the downcasted uint48 from uint256, reverting on * overflow (when the input is greater than largest uint48). * * Counterpart to Solidity's `uint48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toUint48(uint256 value) internal pure returns (uint48) { require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits"); return uint48(value); } /** * @dev Returns the downcasted uint40 from uint256, reverting on * overflow (when the input is greater than largest uint40). * * Counterpart to Solidity's `uint40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toUint40(uint256 value) internal pure returns (uint40) { require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits"); return uint40(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v2.5._ */ function toUint32(uint256 value) internal pure returns (uint32) { require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint24 from uint256, reverting on * overflow (when the input is greater than largest uint24). * * Counterpart to Solidity's `uint24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toUint24(uint256 value) internal pure returns (uint24) { require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits"); return uint24(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v2.5._ */ function toUint16(uint256 value) internal pure returns (uint16) { require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v2.5._ */ function toUint8(uint256 value) internal pure returns (uint8) { require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. * * _Available since v3.0._ */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Returns the downcasted int248 from int256, reverting on * overflow (when the input is less than smallest int248 or * greater than largest int248). * * Counterpart to Solidity's `int248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toInt248(int256 value) internal pure returns (int248 downcasted) { downcasted = int248(value); require(downcasted == value, "SafeCast: value doesn't fit in 248 bits"); } /** * @dev Returns the downcasted int240 from int256, reverting on * overflow (when the input is less than smallest int240 or * greater than largest int240). * * Counterpart to Solidity's `int240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toInt240(int256 value) internal pure returns (int240 downcasted) { downcasted = int240(value); require(downcasted == value, "SafeCast: value doesn't fit in 240 bits"); } /** * @dev Returns the downcasted int232 from int256, reverting on * overflow (when the input is less than smallest int232 or * greater than largest int232). * * Counterpart to Solidity's `int232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toInt232(int256 value) internal pure returns (int232 downcasted) { downcasted = int232(value); require(downcasted == value, "SafeCast: value doesn't fit in 232 bits"); } /** * @dev Returns the downcasted int224 from int256, reverting on * overflow (when the input is less than smallest int224 or * greater than largest int224). * * Counterpart to Solidity's `int224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.7._ */ function toInt224(int256 value) internal pure returns (int224 downcasted) { downcasted = int224(value); require(downcasted == value, "SafeCast: value doesn't fit in 224 bits"); } /** * @dev Returns the downcasted int216 from int256, reverting on * overflow (when the input is less than smallest int216 or * greater than largest int216). * * Counterpart to Solidity's `int216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toInt216(int256 value) internal pure returns (int216 downcasted) { downcasted = int216(value); require(downcasted == value, "SafeCast: value doesn't fit in 216 bits"); } /** * @dev Returns the downcasted int208 from int256, reverting on * overflow (when the input is less than smallest int208 or * greater than largest int208). * * Counterpart to Solidity's `int208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toInt208(int256 value) internal pure returns (int208 downcasted) { downcasted = int208(value); require(downcasted == value, "SafeCast: value doesn't fit in 208 bits"); } /** * @dev Returns the downcasted int200 from int256, reverting on * overflow (when the input is less than smallest int200 or * greater than largest int200). * * Counterpart to Solidity's `int200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toInt200(int256 value) internal pure returns (int200 downcasted) { downcasted = int200(value); require(downcasted == value, "SafeCast: value doesn't fit in 200 bits"); } /** * @dev Returns the downcasted int192 from int256, reverting on * overflow (when the input is less than smallest int192 or * greater than largest int192). * * Counterpart to Solidity's `int192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toInt192(int256 value) internal pure returns (int192 downcasted) { downcasted = int192(value); require(downcasted == value, "SafeCast: value doesn't fit in 192 bits"); } /** * @dev Returns the downcasted int184 from int256, reverting on * overflow (when the input is less than smallest int184 or * greater than largest int184). * * Counterpart to Solidity's `int184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toInt184(int256 value) internal pure returns (int184 downcasted) { downcasted = int184(value); require(downcasted == value, "SafeCast: value doesn't fit in 184 bits"); } /** * @dev Returns the downcasted int176 from int256, reverting on * overflow (when the input is less than smallest int176 or * greater than largest int176). * * Counterpart to Solidity's `int176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toInt176(int256 value) internal pure returns (int176 downcasted) { downcasted = int176(value); require(downcasted == value, "SafeCast: value doesn't fit in 176 bits"); } /** * @dev Returns the downcasted int168 from int256, reverting on * overflow (when the input is less than smallest int168 or * greater than largest int168). * * Counterpart to Solidity's `int168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toInt168(int256 value) internal pure returns (int168 downcasted) { downcasted = int168(value); require(downcasted == value, "SafeCast: value doesn't fit in 168 bits"); } /** * @dev Returns the downcasted int160 from int256, reverting on * overflow (when the input is less than smallest int160 or * greater than largest int160). * * Counterpart to Solidity's `int160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toInt160(int256 value) internal pure returns (int160 downcasted) { downcasted = int160(value); require(downcasted == value, "SafeCast: value doesn't fit in 160 bits"); } /** * @dev Returns the downcasted int152 from int256, reverting on * overflow (when the input is less than smallest int152 or * greater than largest int152). * * Counterpart to Solidity's `int152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toInt152(int256 value) internal pure returns (int152 downcasted) { downcasted = int152(value); require(downcasted == value, "SafeCast: value doesn't fit in 152 bits"); } /** * @dev Returns the downcasted int144 from int256, reverting on * overflow (when the input is less than smallest int144 or * greater than largest int144). * * Counterpart to Solidity's `int144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toInt144(int256 value) internal pure returns (int144 downcasted) { downcasted = int144(value); require(downcasted == value, "SafeCast: value doesn't fit in 144 bits"); } /** * @dev Returns the downcasted int136 from int256, reverting on * overflow (when the input is less than smallest int136 or * greater than largest int136). * * Counterpart to Solidity's `int136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toInt136(int256 value) internal pure returns (int136 downcasted) { downcasted = int136(value); require(downcasted == value, "SafeCast: value doesn't fit in 136 bits"); } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v3.1._ */ function toInt128(int256 value) internal pure returns (int128 downcasted) { downcasted = int128(value); require(downcasted == value, "SafeCast: value doesn't fit in 128 bits"); } /** * @dev Returns the downcasted int120 from int256, reverting on * overflow (when the input is less than smallest int120 or * greater than largest int120). * * Counterpart to Solidity's `int120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toInt120(int256 value) internal pure returns (int120 downcasted) { downcasted = int120(value); require(downcasted == value, "SafeCast: value doesn't fit in 120 bits"); } /** * @dev Returns the downcasted int112 from int256, reverting on * overflow (when the input is less than smallest int112 or * greater than largest int112). * * Counterpart to Solidity's `int112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toInt112(int256 value) internal pure returns (int112 downcasted) { downcasted = int112(value); require(downcasted == value, "SafeCast: value doesn't fit in 112 bits"); } /** * @dev Returns the downcasted int104 from int256, reverting on * overflow (when the input is less than smallest int104 or * greater than largest int104). * * Counterpart to Solidity's `int104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toInt104(int256 value) internal pure returns (int104 downcasted) { downcasted = int104(value); require(downcasted == value, "SafeCast: value doesn't fit in 104 bits"); } /** * @dev Returns the downcasted int96 from int256, reverting on * overflow (when the input is less than smallest int96 or * greater than largest int96). * * Counterpart to Solidity's `int96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.7._ */ function toInt96(int256 value) internal pure returns (int96 downcasted) { downcasted = int96(value); require(downcasted == value, "SafeCast: value doesn't fit in 96 bits"); } /** * @dev Returns the downcasted int88 from int256, reverting on * overflow (when the input is less than smallest int88 or * greater than largest int88). * * Counterpart to Solidity's `int88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toInt88(int256 value) internal pure returns (int88 downcasted) { downcasted = int88(value); require(downcasted == value, "SafeCast: value doesn't fit in 88 bits"); } /** * @dev Returns the downcasted int80 from int256, reverting on * overflow (when the input is less than smallest int80 or * greater than largest int80). * * Counterpart to Solidity's `int80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toInt80(int256 value) internal pure returns (int80 downcasted) { downcasted = int80(value); require(downcasted == value, "SafeCast: value doesn't fit in 80 bits"); } /** * @dev Returns the downcasted int72 from int256, reverting on * overflow (when the input is less than smallest int72 or * greater than largest int72). * * Counterpart to Solidity's `int72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toInt72(int256 value) internal pure returns (int72 downcasted) { downcasted = int72(value); require(downcasted == value, "SafeCast: value doesn't fit in 72 bits"); } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v3.1._ */ function toInt64(int256 value) internal pure returns (int64 downcasted) { downcasted = int64(value); require(downcasted == value, "SafeCast: value doesn't fit in 64 bits"); } /** * @dev Returns the downcasted int56 from int256, reverting on * overflow (when the input is less than smallest int56 or * greater than largest int56). * * Counterpart to Solidity's `int56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toInt56(int256 value) internal pure returns (int56 downcasted) { downcasted = int56(value); require(downcasted == value, "SafeCast: value doesn't fit in 56 bits"); } /** * @dev Returns the downcasted int48 from int256, reverting on * overflow (when the input is less than smallest int48 or * greater than largest int48). * * Counterpart to Solidity's `int48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toInt48(int256 value) internal pure returns (int48 downcasted) { downcasted = int48(value); require(downcasted == value, "SafeCast: value doesn't fit in 48 bits"); } /** * @dev Returns the downcasted int40 from int256, reverting on * overflow (when the input is less than smallest int40 or * greater than largest int40). * * Counterpart to Solidity's `int40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toInt40(int256 value) internal pure returns (int40 downcasted) { downcasted = int40(value); require(downcasted == value, "SafeCast: value doesn't fit in 40 bits"); } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v3.1._ */ function toInt32(int256 value) internal pure returns (int32 downcasted) { downcasted = int32(value); require(downcasted == value, "SafeCast: value doesn't fit in 32 bits"); } /** * @dev Returns the downcasted int24 from int256, reverting on * overflow (when the input is less than smallest int24 or * greater than largest int24). * * Counterpart to Solidity's `int24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toInt24(int256 value) internal pure returns (int24 downcasted) { downcasted = int24(value); require(downcasted == value, "SafeCast: value doesn't fit in 24 bits"); } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v3.1._ */ function toInt16(int256 value) internal pure returns (int16 downcasted) { downcasted = int16(value); require(downcasted == value, "SafeCast: value doesn't fit in 16 bits"); } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v3.1._ */ function toInt8(int256 value) internal pure returns (int8 downcasted) { downcasted = int8(value); require(downcasted == value, "SafeCast: value doesn't fit in 8 bits"); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. * * _Available since v3.0._ */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256"); return int256(value); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @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); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/DoubleEndedQueue.sol) pragma solidity ^0.8.4; import "../math/SafeCast.sol"; /** * @dev A sequence of items with the ability to efficiently push and pop items (i.e. insert and remove) on both ends of * the sequence (called front and back). Among other access patterns, it can be used to implement efficient LIFO and * FIFO queues. Storage use is optimized, and all operations are O(1) constant time. This includes {clear}, given that * the existing queue contents are left in storage. * * The struct is called `Bytes32Deque`. Other types can be cast to and from `bytes32`. This data structure can only be * used in storage, and not in memory. * ```solidity * DoubleEndedQueue.Bytes32Deque queue; * ``` * * _Available since v4.6._ */ library DoubleEndedQueue { /** * @dev An operation (e.g. {front}) couldn't be completed due to the queue being empty. */ error Empty(); /** * @dev An operation (e.g. {at}) couldn't be completed due to an index being out of bounds. */ error OutOfBounds(); /** * @dev Indices are signed integers because the queue can grow in any direction. They are 128 bits so begin and end * are packed in a single storage slot for efficient access. Since the items are added one at a time we can safely * assume that these 128-bit indices will not overflow, and use unchecked arithmetic. * * Struct members have an underscore prefix indicating that they are "private" and should not be read or written to * directly. Use the functions provided below instead. Modifying the struct manually may violate assumptions and * lead to unexpected behavior. * * Indices are in the range [begin, end) which means the first item is at data[begin] and the last item is at * data[end - 1]. */ struct Bytes32Deque { int128 _begin; int128 _end; mapping(int128 => bytes32) _data; } /** * @dev Inserts an item at the end of the queue. */ function pushBack(Bytes32Deque storage deque, bytes32 value) internal { int128 backIndex = deque._end; deque._data[backIndex] = value; unchecked { deque._end = backIndex + 1; } } /** * @dev Removes the item at the end of the queue and returns it. * * Reverts with `Empty` if the queue is empty. */ function popBack(Bytes32Deque storage deque) internal returns (bytes32 value) { if (empty(deque)) revert Empty(); int128 backIndex; unchecked { backIndex = deque._end - 1; } value = deque._data[backIndex]; delete deque._data[backIndex]; deque._end = backIndex; } /** * @dev Inserts an item at the beginning of the queue. */ function pushFront(Bytes32Deque storage deque, bytes32 value) internal { int128 frontIndex; unchecked { frontIndex = deque._begin - 1; } deque._data[frontIndex] = value; deque._begin = frontIndex; } /** * @dev Removes the item at the beginning of the queue and returns it. * * Reverts with `Empty` if the queue is empty. */ function popFront(Bytes32Deque storage deque) internal returns (bytes32 value) { if (empty(deque)) revert Empty(); int128 frontIndex = deque._begin; value = deque._data[frontIndex]; delete deque._data[frontIndex]; unchecked { deque._begin = frontIndex + 1; } } /** * @dev Returns the item at the beginning of the queue. * * Reverts with `Empty` if the queue is empty. */ function front(Bytes32Deque storage deque) internal view returns (bytes32 value) { if (empty(deque)) revert Empty(); int128 frontIndex = deque._begin; return deque._data[frontIndex]; } /** * @dev Returns the item at the end of the queue. * * Reverts with `Empty` if the queue is empty. */ function back(Bytes32Deque storage deque) internal view returns (bytes32 value) { if (empty(deque)) revert Empty(); int128 backIndex; unchecked { backIndex = deque._end - 1; } return deque._data[backIndex]; } /** * @dev Return the item at a position in the queue given by `index`, with the first item at 0 and last item at * `length(deque) - 1`. * * Reverts with `OutOfBounds` if the index is out of bounds. */ function at(Bytes32Deque storage deque, uint256 index) internal view returns (bytes32 value) { // int256(deque._begin) is a safe upcast int128 idx = SafeCast.toInt128(int256(deque._begin) + SafeCast.toInt256(index)); if (idx >= deque._end) revert OutOfBounds(); return deque._data[idx]; } /** * @dev Resets the queue back to being empty. * * NOTE: The current items are left behind in storage. This does not affect the functioning of the queue, but misses * out on potential gas refunds. */ function clear(Bytes32Deque storage deque) internal { deque._begin = 0; deque._end = 0; } /** * @dev Returns the number of items in the queue. */ function length(Bytes32Deque storage deque) internal view returns (uint256) { // The interface preserves the invariant that begin <= end so we assume this will not overflow. // We also assume there are at most int256.max items in the queue. unchecked { return uint256(int256(deque._end) - int256(deque._begin)); } } /** * @dev Returns true if the queue is empty. */ function empty(Bytes32Deque storage deque) internal view returns (bool) { return deque._end <= deque._begin; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.19; import "@openzeppelin/contracts/governance/TimelockController.sol"; /** * @dev Error: fail to initialise timelock controller either attempting to initialise twice or * attempting to initialise with an invalid governor address. */ error FailToInitialiseTimelockController(bool initialised, address governor); /** * @title DivaTimelockController Contract * @author ShamirLabs * @notice This contract is used to queue successful proposals. */ contract DivaTimelockController is TimelockController { bool private _initialised; constructor( uint256 minDelay ) TimelockController( minDelay, new address[](0), new address[](0), msg.sender ) {} // @dev This function has to be called after the contract is deployed to setup the // governance contract correctly. function initialiseAndRevokeAdminRole( address _governor ) external onlyRole(TIMELOCK_ADMIN_ROLE) { if (_initialised == false && _governor != address(0)) { _setupRole(EXECUTOR_ROLE, address(0)); // @dev grant EXECUTOR_ROLE to everyone _setupRole(PROPOSER_ROLE, _governor); _setupRole(CANCELLER_ROLE, address(this)); _revokeRole(TIMELOCK_ADMIN_ROLE, _msgSender()); _initialised = true; } else { revert FailToInitialiseTimelockController(_initialised, _governor); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.19; import "@openzeppelin/contracts/governance/Governor.sol"; /** * @dev Custom error for invalid configuration of thresholds */ error DaoInvalidThresholdTypeConfiguration(); /** * @title GovernorCountingThresholds extension * @author ShamirLabs * @dev Extension of {Governor} for simple, 3 options, vote counting. Three different thresholds * for a proposal to be successful can be configured: * - DEFAULT: 50% + 1 * - MODERATE: 66% + 1 * - LARGE: 75% + 1 */ abstract contract GovernorCountingThresholds is Governor { /** * @dev Supported vote types. Matches Governor Bravo ordering. */ enum VoteType { Against, For, Abstain } /** * @dev three thresholds types */ enum ThresholdType { DEFAULT, MODERATE, LARGE } struct ProposalVote { uint256 againstVotes; uint256 forVotes; uint256 abstainVotes; mapping(address => bool) hasVoted; ThresholdType successThreshold; // @dev store proposal threshold at proposition time } /** * @dev emitted when a proposal success threshold is set */ event SuccessThresholdTypeSet(uint256 proposalId, ThresholdType threshold); mapping(uint256 => ProposalVote) private _proposalVotes; /** * @dev threshold thresholds per target per function */ mapping(bytes4 => ThresholdType) private _targetFunctionThreshold; /** * @notice GovernorCountingThresholds Constructor * @param functionSignatures list of function signatures * @param functionsThresholds list of ThresholdType */ constructor( bytes4[] memory functionSignatures, ThresholdType[] memory functionsThresholds ) { if (functionSignatures.length != functionsThresholds.length) revert DaoInvalidThresholdTypeConfiguration(); for (uint256 i = 0; i < functionSignatures.length; i++) { _targetFunctionThreshold[ functionSignatures[i] ] = functionsThresholds[i]; } } /** * @notice This function is used to add threshold configuration to functions * @param signaturesLargeThreshold list of function signatures that should have a large threshold * @param signaturesModerateThreshold list of function signatures that should have a moderate threshold * @param signaturesDefaultThreshold list of function signatures that should have a default threshold */ function addThresholdConfiguration( bytes4[] memory signaturesLargeThreshold, bytes4[] memory signaturesModerateThreshold, bytes4[] memory signaturesDefaultThreshold ) external onlyGovernance { for (uint256 i = 0; i < signaturesLargeThreshold.length; i++) { _targetFunctionThreshold[ signaturesLargeThreshold[i] ] = ThresholdType.LARGE; } for (uint256 i = 0; i < signaturesModerateThreshold.length; i++) { _targetFunctionThreshold[ signaturesModerateThreshold[i] ] = ThresholdType.MODERATE; } for (uint256 i = 0; i < signaturesDefaultThreshold.length; i++) { _targetFunctionThreshold[ signaturesDefaultThreshold[i] ] = ThresholdType.DEFAULT; } } /** * @dev See {IGovernor-COUNTING_MODE}. */ // solhint-disable-next-line func-name-mixedcase function COUNTING_MODE() public pure virtual override returns (string memory) { return "support=bravo&quorum=for,abstain"; } /** * @dev See {IGovernor-hasVoted}. */ function hasVoted( uint256 proposalId, address account ) public view virtual override returns (bool) { return _proposalVotes[proposalId].hasVoted[account]; } /** * @dev Accessor to the internal vote counts. */ function proposalVotes( uint256 proposalId ) public view virtual returns (uint256 againstVotes, uint256 forVotes, uint256 abstainVotes) { ProposalVote storage proposalVote = _proposalVotes[proposalId]; return ( proposalVote.againstVotes, proposalVote.forVotes, proposalVote.abstainVotes ); } /** * @dev See {Governor-_quorumReached}. */ function _quorumReached( uint256 proposalId ) internal view virtual override returns (bool) { ProposalVote storage proposalVote = _proposalVotes[proposalId]; return quorum(proposalSnapshot(proposalId)) <= proposalVote.forVotes + proposalVote.abstainVotes; } /** * @notice Returns the threshold type for a given function signature * @param proposalId function signature */ function getSuccessThreshold( uint256 proposalId ) public view virtual returns (ThresholdType) { return _proposalVotes[proposalId].successThreshold; } /** * @dev See {Governor-_voteSucceeded}. In this module, the forVotes must be strictly over the againstVotes. * @param proposalId id of the proposal */ function _voteSucceeded( uint256 proposalId ) internal view virtual override returns (bool) { bool result; ProposalVote storage proposalVote = _proposalVotes[proposalId]; ThresholdType threshold = _proposalVotes[proposalId].successThreshold; // @dev edge cases for againsVotes and forVotes if (threshold == ThresholdType.LARGE) { // @dev LARGE threshold is a super majority of 75% ||| FOR / (FOR + AGAINST)) > 3/4 -> 4 * FOR > 3 * (FOR + AGAINST) -> FOR > 3 * TOTAL result = (proposalVote.forVotes > 3 * proposalVote.againstVotes); } else if (threshold == ThresholdType.MODERATE) { // @dev MODERATE threshold is a super majority of 66% FOR / (FOR + AGAINST)) > 2/3 -> 3 * FOR > 2 * (FOR + AGAINST) -> FOR > 2 * AGAINST result = (proposalVote.forVotes > 2 * proposalVote.againstVotes); } else { // @dev DEFAULT threshold is a super majority of 50% FOR / (FOR + AGAINST)) > 1/2 -> 2 * FOR > 1 * (FOR + AGAINST) result = (proposalVote.forVotes > proposalVote.againstVotes); } return result; } /** * @notice Returns true if the proposal has succeeded */ function voteSucceeded( uint256 proposalId ) public view virtual returns (bool) { return _voteSucceeded(proposalId); } /** * @notice This function is used at the proposal creation time to set the success threshold based on the function * signatures of the actions */ function _setSuccessThreshold( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, string memory description ) internal { uint256 proposalId = hashProposal( targets, values, calldatas, keccak256(bytes(description)) ); // @dev start with default threshold ThresholdType threshold = ThresholdType.DEFAULT; // @dev increase it if any of the targets has a function with a higher threshold for (uint256 i = 0; i < calldatas.length; i++) { bytes4 sig = bytes4(calldatas[i]); if (_targetFunctionThreshold[sig] == ThresholdType.LARGE) { threshold = ThresholdType.LARGE; break; } if (_targetFunctionThreshold[sig] == ThresholdType.MODERATE) { threshold = ThresholdType.MODERATE; } } _proposalVotes[proposalId].successThreshold = threshold; emit SuccessThresholdTypeSet(proposalId, threshold); } /** * @dev See {Governor-_countVote}. In this module, the support follows the `VoteType` enum (from Governor Bravo). */ function _countVote( uint256 proposalId, address account, uint8 support, uint256 weight, bytes memory // params ) internal virtual override { ProposalVote storage proposalVote = _proposalVotes[proposalId]; require( !proposalVote.hasVoted[account], "GovernorVotingSimple: vote already cast" ); proposalVote.hasVoted[account] = true; if (support == uint8(VoteType.Against)) { proposalVote.againstVotes += weight; } else if (support == uint8(VoteType.For)) { proposalVote.forVotes += weight; } else if (support == uint8(VoteType.Abstain)) { proposalVote.abstainVotes += weight; } else { revert("GovernorVotingSimple: invalid value for enum VoteType"); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.19; import "@openzeppelin/contracts/governance/extensions/IGovernorTimelock.sol"; import "@openzeppelin/contracts/governance/Governor.sol"; import "./DivaTimelockController.sol"; /** * @dev Custom error for invalid configuration of delays */ error DaoInvalidDelaysConfiguration(); /** * @dev Custom error for invalid configuration of delays */ error DaoInvalidDelaysSetup(); /** * @dev Custom error for invalid configuration of delays */ error CancelProposalMustHaveShortDelay(); /** * @dev Custom error for invalid configuration of delays */ error InvalidDelayValue(); /** * @dev Custom error for short delay proposal with value */ error ShortDelayProposalCannotHaveValue(); /** * @title GovernorTimelockControlConfigurable extension * @author ShamirLabs * @dev Extension of {Governor} that binds the execution process to an instance of {TimelockController}. This adds a custom * delay based on function signature in actions, enforced by the {TimelockController} to all successful proposal (in addition to the voting duration). The * {Governor} needs the proposer (and ideally the executor) roles for the {Governor} to work properly. */ abstract contract GovernorTimelockControlConfigurable is IGovernorTimelock, Governor { DivaTimelockController private _timelock; mapping(uint256 => bytes32) private _timelockIds; mapping(bytes4 => DelayType) private _functionsDelays; uint256 private _defaultDelay; uint256 private _shortDelay; uint256 private _longDelay; uint256 private constant SECONDS_PER_BLOCK = 12; bytes4 public constant CANCEL_PROPOSAL_TYPEHASH = bytes4(keccak256(bytes("cancel(bytes32)"))); enum DelayType { // we do not need it here but we keep it at the first slot so when // _functionsDelays is queried, if an entry does not exist in the mapping (and returns 0) // will be the same than setting it to DEFAULT DEFAULT, // short delay type is used for emergency proposals // in order for a proposal to have a SHORT delay, all functions calls must have the SHORT delay type // This is to avoid having a malicious proposal bypass the timelock by including just a pause function after // the malicious operation SHORT, // long delay type is used to operations like recovering funds from the pool // as long as 1 function call belongs to this type, the whole proposal will have a LONG delay // This is to avoid a malicious DAO to include any actions PLUS recovering funds from the pool // and bypass the long timelock to give users time to recover their positions LONG } /** * @dev Emitted when the timelock controller used for proposal execution is modified. */ event TimelockChange(address oldTimelock, address newTimelock); /** * @dev Set the timelock and configure timelocks for function signatures * */ constructor( DivaTimelockController timelockAddress, bytes4[] memory functionSignatures, DelayType[] memory functionsDelays, uint256 defaultDelay, uint256 shortDelay, uint256 longDelay ) { // @dev enforce proper configuration in deployment if (shortDelay >= defaultDelay || longDelay <= defaultDelay) { revert DaoInvalidDelaysSetup(); } _defaultDelay = defaultDelay; _shortDelay = shortDelay; _longDelay = longDelay; if (functionSignatures.length != functionsDelays.length) { revert DaoInvalidDelaysConfiguration(); } for (uint256 i = 0; i < functionSignatures.length; i++) { _functionsDelays[functionSignatures[i]] = functionsDelays[i]; } _updateTimelock(timelockAddress); } /** * @notice This function is used to add a delay configuration for function signatures * @param signaturesLongDelay function signatures to be set with a long delay * @param signaturesShortDelay function signatures to be set with a short delay * @param signaturesDefaultDelay function signatures to be set with a default delay */ function addDelayConfiguration( bytes4[] memory signaturesLongDelay, bytes4[] memory signaturesShortDelay, bytes4[] memory signaturesDefaultDelay ) external onlyGovernance { for (uint256 i = 0; i < signaturesLongDelay.length; i++) { if (signaturesLongDelay[i] == CANCEL_PROPOSAL_TYPEHASH) revert CancelProposalMustHaveShortDelay(); _functionsDelays[signaturesLongDelay[i]] = DelayType.LONG; } for (uint256 i = 0; i < signaturesShortDelay.length; i++) { _functionsDelays[signaturesShortDelay[i]] = DelayType.SHORT; } for (uint256 i = 0; i < signaturesDefaultDelay.length; i++) { if (signaturesDefaultDelay[i] == CANCEL_PROPOSAL_TYPEHASH) revert CancelProposalMustHaveShortDelay(); _functionsDelays[signaturesDefaultDelay[i]] = DelayType.DEFAULT; } } /** * @notice This function is used to update the short delay value * @param newDelay new delay to be set */ function updateShortDelay(uint256 newDelay) external onlyGovernance { if (newDelay >= _defaultDelay) revert InvalidDelayValue(); _shortDelay = newDelay; } /** * @notice This function is used to update the default delay value * @param newDelay new delay to be set */ function updateDefaultDelay(uint256 newDelay) external onlyGovernance { if (_shortDelay >= newDelay || newDelay >= _longDelay) revert InvalidDelayValue(); _defaultDelay = newDelay; } /** * @notice This function is used to update the long delay value * @param newDelay new delay to be set */ function updateLongDelay(uint256 newDelay) external onlyGovernance { if (newDelay <= _defaultDelay) revert InvalidDelayValue(); _longDelay = newDelay; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface( bytes4 interfaceId ) public view virtual override(IERC165, Governor) returns (bool) { return interfaceId == type(IGovernorTimelock).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Overridden version of the {Governor-state} function with added support for the `Queued` status. */ function state( uint256 proposalId ) public view virtual override(IGovernor, Governor) returns (ProposalState) { ProposalState status = super.state(proposalId); if (status != ProposalState.Succeeded) { return status; } // core tracks execution, so we just have to check if successful proposal have been queued. bytes32 queueid = _timelockIds[proposalId]; if (queueid == bytes32(0)) { return status; } else if (_timelock.isOperationDone(queueid)) { return ProposalState.Executed; } else if (_timelock.isOperationPending(queueid)) { return ProposalState.Queued; } else { return ProposalState.Canceled; } } /** * @dev Public accessor to check the address of the timelock */ function timelock() public view virtual override returns (address) { return address(_timelock); } /** * @dev Public accessor to check the eta of a queued proposal */ function proposalEta( uint256 proposalId ) public view virtual override returns (uint256) { uint256 eta = _timelock.getTimestamp(_timelockIds[proposalId]); return eta == 1 ? 0 : eta; // _DONE_TIMESTAMP (1) should be replaced with a 0 value } /** * @dev Function to queue a proposal to the timelock. */ function queue( address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) public virtual override returns (uint256) { uint256 proposalId = hashProposal( targets, values, calldatas, descriptionHash ); require( state(proposalId) == ProposalState.Succeeded, "Governor: proposal not successful" ); uint256 delay = _getDelay(calldatas, values); _timelockIds[proposalId] = _timelock.hashOperationBatch( targets, values, calldatas, 0, descriptionHash ); _timelock.scheduleBatch( targets, values, calldatas, 0, descriptionHash, delay ); emit ProposalQueued(proposalId, block.timestamp + delay); return proposalId; } /** * @dev Public endpoint to update the underlying timelock instance. Restricted to the timelock itself, so updates * must be proposed, scheduled, and executed through governance proposals. * * CAUTION: It is not recommended to change the timelock while there are other queued governance proposals. */ function updateTimelock( DivaTimelockController newTimelock ) external virtual onlyGovernance { _updateTimelock(newTimelock); } function _updateTimelock(DivaTimelockController newTimelock) private { emit TimelockChange(address(_timelock), address(newTimelock)); _timelock = newTimelock; } /** * @dev Function used to calculate the timelock delay based on the actions the proposal is trying to eventually execute * If there is ONE function with DelayType == LONG delay, we return _longDelay * If ALL functions have DelayType == SHORT, we return _shortDelay * Otherwise, we return _defaultDelay */ function _getDelay( bytes[] memory calldatas, uint256[] memory values ) internal view returns (uint256) { // if there are no functions to execute in a proposal, it won't use the SHORT delay // it will also NOT enter the loop, which means the DEFAULT delay will be used bool isShortDelay = calldatas.length > 0; for (uint256 i = 0; i < calldatas.length; i++) { bytes4 sig = bytes4(calldatas[i]); // @dev any proposal that attempts to withdraw ETH uses long delay if (values[i] > 0) { return _longDelay * SECONDS_PER_BLOCK; } DelayType delay = _functionsDelays[sig]; if (delay == DelayType.LONG) { return _longDelay * SECONDS_PER_BLOCK; } if (delay != DelayType.SHORT) { isShortDelay = false; } } return isShortDelay == true ? _shortDelay * SECONDS_PER_BLOCK : _defaultDelay * SECONDS_PER_BLOCK; } /** * @dev Overridden execute function that run the already queued proposal through the timelock. */ function _execute( uint256 /* proposalId */, address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash ) internal virtual override { _timelock.executeBatch{value: msg.value}( targets, values, calldatas, 0, descriptionHash ); } /** * @dev Address through which the governor executes action. In this case, the timelock. */ function _executor() internal view virtual override returns (address) { return address(_timelock); } }
{ "evmVersion": "paris", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 200 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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DivaTimelockController","name":"newTimelock","type":"address"}],"name":"updateTimelock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"proposalId","type":"uint256"}],"name":"voteSucceeded","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"votingDelay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"votingPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]
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] : _token (address): 0xBFAbdE619ed5C4311811cF422562709710DB587d
Arg [1] : _timelock (address): 0x4eBB20995B6264b4b1E25f4473a4636CDB6a9790
Arg [2] : _settings (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]
-----Encoded View---------------
70 Constructor Arguments found :
Arg [0] : 000000000000000000000000bfabde619ed5c4311811cf422562709710db587d
Arg [1] : 0000000000000000000000004ebb20995b6264b4b1e25f4473a4636cdb6a9790
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000160
Arg [4] : 0000000000000000000000000000000000000000000000000000000000003840
Arg [5] : 0000000000000000000000000000000000000000000000000000000000005460
Arg [6] : 000000000000000000000000000000000000000000084595161401484a000000
Arg [7] : 00000000000000000000000000000000000000000000d3c21bcecceda1000000
Arg [8] : 000000000000000000000000000000000000000000000000000000000000a8c0
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000258
Arg [10] : 0000000000000000000000000000000000000000000000000000000000011940
Arg [11] : 00000000000000000000000000000000000000000000000000000000000001a0
Arg [12] : 00000000000000000000000000000000000000000000000000000000000003e0
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000620
Arg [14] : 000000000000000000000000000000000000000000000000000000000000000d
Arg [15] : 4469766120476f7665726e6f7200000000000000000000000000000000000000
Arg [16] : 0000000000000000000000000000000000000000000000000000000000000011
Arg [17] : 70b0f66000000000000000000000000000000000000000000000000000000000
Arg [18] : ea0217cf00000000000000000000000000000000000000000000000000000000
Arg [19] : ece40cc100000000000000000000000000000000000000000000000000000000
Arg [20] : ae12302000000000000000000000000000000000000000000000000000000000
Arg [21] : b868995f00000000000000000000000000000000000000000000000000000000
Arg [22] : 50e5efd800000000000000000000000000000000000000000000000000000000
Arg [23] : d38f834c00000000000000000000000000000000000000000000000000000000
Arg [24] : a890c91000000000000000000000000000000000000000000000000000000000
Arg [25] : 35680dc200000000000000000000000000000000000000000000000000000000
Arg [26] : b9360fd800000000000000000000000000000000000000000000000000000000
Arg [27] : 3f4ba83a00000000000000000000000000000000000000000000000000000000
Arg [28] : a9059cbb00000000000000000000000000000000000000000000000000000000
Arg [29] : 095ea7b300000000000000000000000000000000000000000000000000000000
Arg [30] : 23b872dd00000000000000000000000000000000000000000000000000000000
Arg [31] : 3950935100000000000000000000000000000000000000000000000000000000
Arg [32] : a457c2d700000000000000000000000000000000000000000000000000000000
Arg [33] : c4d252f500000000000000000000000000000000000000000000000000000000
Arg [34] : 0000000000000000000000000000000000000000000000000000000000000011
Arg [35] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [36] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [37] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [38] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [39] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [40] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [41] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [42] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [43] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [44] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [45] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [46] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [47] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [48] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [49] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [50] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [51] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [52] : 0000000000000000000000000000000000000000000000000000000000000011
Arg [53] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [54] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [55] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [56] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [57] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [58] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [59] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [60] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [61] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [62] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [63] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [64] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [65] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [66] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [67] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [68] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [69] : 0000000000000000000000000000000000000000000000000000000000000002
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Multichain Portfolio | 25 Chains
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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.