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Contract Source Code Verified (Exact Match)
Contract Name:
StakedLBTC
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {ERC20Upgradeable, IERC20} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol"; import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol"; import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {Math} from "@openzeppelin/contracts/utils/math/Math.sol"; import {BitcoinUtils} from "../libs/BitcoinUtils.sol"; import {IBascule} from "../bascule/interfaces/IBascule.sol"; import {INotaryConsortium} from "../consortium/INotaryConsortium.sol"; import {IAssetRouter} from "./interfaces/IAssetRouter.sol"; import {Actions} from "../libs/Actions.sol"; import {IStakedLBTC} from "./interfaces/IStakedLBTC.sol"; import {IBaseLBTC} from "./interfaces/IBaseLBTC.sol"; import {Assert} from "./libraries/Assert.sol"; import {Validation} from "./libraries/Validation.sol"; import {Redeem} from "./libraries/Redeem.sol"; import {BaseLBTC} from "./BaseLBTC.sol"; /** * @title ERC20 representation of Lombard Staked Bitcoin * @author Lombard.Finance * @notice This contract is part of the Lombard.Finance protocol */ contract StakedLBTC is IStakedLBTC, BaseLBTC, Ownable2StepUpgradeable { using SafeERC20 for IERC20; /// @dev the storage name differs, because contract was renamed from LBTC /// @custom:storage-location erc7201:lombardfinance.storage.LBTC struct StakedLBTCStorage { /// @dev is keccak256(payload[4:]) used /// @custom:oz-renamed-from usedProofs mapping(bytes32 => bool) legacyUsedPayloads; /// @custom:oz-renamed-from name string __removed__name; /// @custom:oz-renamed-from symbol string __removed__symbol; /// @custom:oz-renamed-from isWithdrawalsEnabled bool __removed__isWithdrawalsEnabled; INotaryConsortium consortium; /// @custom:oz-renamed-from isWBTCEnabled bool __removed_isWBTCEnabled; /// @custom:oz-renamed-from wbtc address __removed_wbtc; address treasury; /// @custom:oz-renamed-from destinations mapping(uint256 => address) __removed_destinations; /// @custom:oz-renamed-from depositCommission mapping(uint256 => uint16) __removed_depositCommission; /// @custom:oz-renamed-from usedBridgeProofs mapping(bytes32 => bool) __removed_usedBridgeProofs; /// @custom:oz-renamed-from globalNonce uint256 __removed_globalNonce; /// @custom:oz-renamed-from destinations mapping(bytes32 => bytes32) __removed__destinations; /// @custom:oz-renamed-from depositRelativeCommission mapping(bytes32 => uint16) __removed__depositRelativeCommission; /// @custom:oz-renamed-from depositAbsoluteCommission mapping(bytes32 => uint64) __removed__depositAbsoluteCommission; /// @custom:oz-renamed-from burnCommission uint64 __removed__burnCommission; // absolute commission to charge on burn (unstake) /// @custom:oz-renamed-from burnCommission uint256 __removed__dustFeeRate; /// Bascule drawbridge used to confirm deposits before allowing withdrawals /// @custom:oz-renamed-from bascule IBascule __removed__bascule; address pauser; mapping(address => bool) minters; mapping(address => bool) claimers; /// Maximum fee to apply on mints /// @custom:oz-renamed-from maximumFee uint256 __removed__maximumFee; /// @custom:oz-renamed-from usedPayloads mapping(bytes32 => bool) __removed__usedPayloads; // sha256(rawPayload) => used address operator; IAssetRouter assetRouter; } /// @dev the storage location differs, because contract was renamed from LBTC /// keccak256(abi.encode(uint256(keccak256("lombardfinance.storage.LBTC")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant STAKED_LBTC_STORAGE_LOCATION = 0xa9a2395ec4edf6682d754acb293b04902817fdb5829dd13adb0367ab3a26c700; /// @dev https://docs.openzeppelin.com/upgrades-plugins/1.x/writing-upgradeable#initializing_the_implementation_contract /// @custom:oz-upgrades-unsafe-allow constructor constructor() { _disableInitializers(); } /// INTIALIZERS /// function initialize( address consortium_, address treasury, address owner_ ) external initializer { __ERC20_init("", ""); __ERC20Pausable_init(); __Ownable_init(owner_); __Ownable2Step_init(); __ERC20Permit_init("Lombard Staked Bitcoin"); // TODO: set new name __ReentrancyGuard_init(); __StakedLBTC_init( "Lombard Staked Bitcoin", // TODO: set new name "stLBTC", // TODO: set new symbol consortium_, treasury ); } function reinitialize() external reinitializer(2) onlyOwner {} /// MODIFIER /// /** * PAUSE */ modifier onlyPauser() { if (pauser() != _msgSender()) { revert UnauthorizedAccount(_msgSender()); } _; } modifier onlyMinter() { if (!_getStakedLBTCStorage().minters[_msgSender()]) { revert UnauthorizedAccount(_msgSender()); } _; } modifier onlyClaimer() { if (!_getStakedLBTCStorage().claimers[_msgSender()]) { revert UnauthorizedAccount(_msgSender()); } _; } /// ONLY OWNER FUNCTIONS /// function toggleRedeemsForBtc() external onlyOwner { _getStakedLBTCStorage().assetRouter.toggleRedeem(); } function changeNameAndSymbol( string calldata name_, string calldata symbol_ ) external onlyOwner { _changeNameAndSymbol(name_, symbol_); } function changeConsortium(address newVal) external onlyOwner { _changeConsortium(newVal); } function changeTreasuryAddress(address newValue) external onlyOwner { _changeTreasury(newValue); } function pause() external onlyPauser { _pause(); } function unpause() external onlyOwner { _unpause(); } function addMinter(address newMinter) external onlyOwner { _updateMinter(newMinter, true); } function removeMinter(address oldMinter) external onlyOwner { _updateMinter(oldMinter, false); } function addClaimer(address newClaimer) external onlyOwner { _updateClaimer(newClaimer, true); } function removeClaimer(address oldClaimer) external onlyOwner { _updateClaimer(oldClaimer, false); } function changeAssetRouter(address newVal) external onlyOwner { _changeAssetRouter(newVal); } function changeRedeemFee(uint256 newVal) external onlyOwner { _changeRedeemFee(newVal); } function changeRedeemForBtcMinAmount(uint256 newVal) external onlyOwner { _changeRedeemForBtcMinAmount(newVal); } function changePauser(address newPauser) external onlyOwner { _changePauser(newPauser); } function changeOperator(address newOperator) external onlyOwner { _changeOperator(newOperator); } /// GETTERS /// /// @notice Calculate the amount that will be unstaked and check if it's above the dust limit /// @dev This function can be used by front-ends to verify burn amounts before submitting a transaction /// @param scriptPubkey The Bitcoin script public key as a byte array /// @param amount The amount of LBTC to be burned /// @return amountAfterFee The amount that will be unstaked (after deducting the burn commission) /// @return isAboveDust Whether the amountAfterFee is equal to or above the dust limit function calcUnstakeRequestAmount( bytes calldata scriptPubkey, uint256 amount ) external view returns (uint256 amountAfterFee, bool isAboveDust) { StakedLBTCStorage storage $ = _getStakedLBTCStorage(); return $.assetRouter.calcUnstakeRequestAmount( address(this), scriptPubkey, amount ); } function consortium() external view virtual returns (INotaryConsortium) { return _getStakedLBTCStorage().consortium; } function getAssetRouter() external view override returns (address) { return address(_getStakedLBTCStorage().assetRouter); } /** * @dev Returns the number of decimals used to get its user representation. * * Because LBTC repsents BTC we use the same decimals. * */ function decimals() public view virtual override returns (uint8) { return 8; } function getTreasury() public view override returns (address) { return _getStakedLBTCStorage().treasury; } function toNativeCommission() public view returns (uint64) { return _getStakedLBTCStorage().assetRouter.toNativeCommission( address(this) ); } function getRedeemFee() public view returns (uint256) { (uint256 redeemFee, , ) = _getStakedLBTCStorage() .assetRouter .tokenConfig(address(this)); return redeemFee; } function getRedeemForBtcMinAmount() public view returns (uint256) { (, uint256 redeemForBtcMinAmount, ) = _getStakedLBTCStorage() .assetRouter .tokenConfig(address(this)); return redeemForBtcMinAmount; } /** * Get Bascule contract. */ function Bascule() external view returns (IBascule) { return _getStakedLBTCStorage().assetRouter.bascule(); } function pauser() public view returns (address) { return _getStakedLBTCStorage().pauser; } function operator() external view returns (address) { return _getStakedLBTCStorage().operator; } function isMinter(address minter) external view returns (bool) { return _getStakedLBTCStorage().minters[minter]; } function isClaimer(address claimer) external view returns (bool) { return _getStakedLBTCStorage().claimers[claimer]; } function isNative() public pure returns (bool) { return false; } function isRedeemsEnabled() public view override returns (bool) { (, , bool isRedeemEnabled) = _getStakedLBTCStorage() .assetRouter .tokenConfig(address(this)); return isRedeemEnabled; } function ratio() external view override returns (uint256) { return _getStakedLBTCStorage().assetRouter.ratio(address(this)); } function getRate() external view override returns (uint256) { return _getStakedLBTCStorage().assetRouter.getRate(address(this)); } /// USER ACTIONS /// /** * @notice Mint LBTC to the specified address * @param to The address to mint to * @param amount The amount of LBTC to mint * @dev Only callable by whitelisted minters */ function mint(address to, uint256 amount) external override onlyMinter { _mint(to, amount); } /** * @notice Mint LBTC in batches * @param to The addresses to mint to * @param amount The amounts of LBTC to mint * @dev Only callable by whitelisted minters */ function batchMint( address[] calldata to, uint256[] calldata amount ) external onlyMinter { _batchMint(to, amount); } /** * @notice Mint StakedLBTC by proving a stake action happened * @param rawPayload The message with the stake data * @param proof Signature of the consortium approving the mint */ function mint( bytes calldata rawPayload, bytes calldata proof ) external nonReentrant returns (address recipient) { StakedLBTCStorage storage $ = _getStakedLBTCStorage(); if (address($.assetRouter) == address(0)) { revert AssetRouterNotSet(); } return $.assetRouter.mint(rawPayload, proof); } /** * @notice Mint StakedLBTC in batches by DepositV1 payloads * @param payload The messages with the stake data * @param proof Signatures of the consortium approving the mints */ function batchMint( bytes[] calldata payload, bytes[] calldata proof ) external nonReentrant { if (paused()) { revert EnforcedPause(); } StakedLBTCStorage storage $ = _getStakedLBTCStorage(); if (address($.assetRouter) == address(0)) { revert AssetRouterNotSet(); } $.assetRouter.batchMint(payload, proof); } /** * @notice Mint LBTC applying a commission to the amount * @dev Payload should be same as mint to avoid reusing them with and without fee * @param mintPayload The message with the stake data * @param proof Signature of the consortium approving the mint * @param feePayload Contents of the fee approval signed by the user * @param userSignature Signature of the user to allow Fee */ function mintWithFee( bytes calldata mintPayload, bytes calldata proof, bytes calldata feePayload, bytes calldata userSignature ) external onlyClaimer { _mintWithFee(mintPayload, proof, feePayload, userSignature); } /** * @notice Mint Staked LBTC in batches proving stake actions happened * @param mintPayload DepositV1 payloads * @param proof Signatures of the consortium approving the mints * @param feePayload Contents of the fee approvals signed by the user * @param userSignature Signatures of the user to allow Fees */ function batchMintWithFee( bytes[] calldata mintPayload, bytes[] calldata proof, bytes[] calldata feePayload, bytes[] calldata userSignature ) external onlyClaimer { if (paused()) { revert EnforcedPause(); } StakedLBTCStorage storage $ = _getStakedLBTCStorage(); if (address($.assetRouter) == address(0)) { revert AssetRouterNotSet(); } $.assetRouter.batchMintWithFee( mintPayload, proof, feePayload, userSignature ); } /** * @dev Burns StakedLBTC to initiate withdrawal of BTC to provided `scriptPubkey` with `amount` * * @param scriptPubkey scriptPubkey for output * @param amount Amount of StakedLBTC to burn */ function redeemForBtc( bytes calldata scriptPubkey, uint256 amount ) external { StakedLBTCStorage storage $ = _getStakedLBTCStorage(); if (address($.assetRouter) == address(0)) { revert AssetRouterNotSet(); } $.assetRouter.redeemForBtc( address(_msgSender()), address(this), scriptPubkey, amount ); } /** * @dev Burns LBTC * * @param amount Amount of LBTC to burn */ function burn(uint256 amount) external { _burn(_msgSender(), amount); } /** * @dev Allows minters to burn LBTC * * @param amount Amount of LBTC to burn */ function burn(address from, uint256 amount) external override onlyMinter { _burn(from, amount); } function redeem(uint256 amount) external nonReentrant { StakedLBTCStorage storage $ = _getStakedLBTCStorage(); if (address($.assetRouter) == address(0)) { revert AssetRouterNotSet(); } $.assetRouter.redeem(_msgSender(), address(this), amount); } function deposit(uint256 amount) external nonReentrant { StakedLBTCStorage storage $ = _getStakedLBTCStorage(); if (address($.assetRouter) == address(0)) { revert AssetRouterNotSet(); } $.assetRouter.deposit(_msgSender(), address(this), amount); } /// PRIVATE FUNCTIONS /// function __StakedLBTC_init( string memory name_, string memory symbol_, address consortium_, address treasury ) internal onlyInitializing { _changeNameAndSymbol(name_, symbol_); _changeConsortium(consortium_); _changeTreasury(treasury); } function _mintWithFee( bytes calldata mintPayload, bytes calldata proof, bytes calldata feePayload, bytes calldata userSignature ) internal { StakedLBTCStorage storage $ = _getStakedLBTCStorage(); if (address($.assetRouter) == address(0)) { revert AssetRouterNotSet(); } $.assetRouter.mintWithFee( mintPayload, proof, feePayload, userSignature ); } /// @dev not zero function _changeConsortium(address newVal) internal { Assert.zeroAddress(newVal); StakedLBTCStorage storage $ = _getStakedLBTCStorage(); emit ConsortiumChanged(address($.consortium), newVal); $.consortium = INotaryConsortium(newVal); } /// @dev Not zero function _changePauser(address newPauser) internal { Assert.zeroAddress(newPauser); StakedLBTCStorage storage $ = _getStakedLBTCStorage(); address oldPauser = $.pauser; $.pauser = newPauser; emit PauserRoleTransferred(oldPauser, newPauser); } /// @dev Not zero function _changeOperator(address newOperator) internal { Assert.zeroAddress(newOperator); StakedLBTCStorage storage $ = _getStakedLBTCStorage(); address oldOperator = $.operator; $.operator = newOperator; emit OperatorRoleTransferred(oldOperator, newOperator); } /// @dev `minter` not zero function _updateMinter(address minter, bool _isMinter) internal { Assert.zeroAddress(minter); _getStakedLBTCStorage().minters[minter] = _isMinter; emit MinterUpdated(minter, _isMinter); } /// @dev `claimer` not zero function _updateClaimer(address claimer, bool _isClaimer) internal { Assert.zeroAddress(claimer); _getStakedLBTCStorage().claimers[claimer] = _isClaimer; emit ClaimerUpdated(claimer, _isClaimer); } /// @dev `treasury` not zero function _changeTreasury(address newValue) internal { Assert.zeroAddress(newValue); StakedLBTCStorage storage $ = _getStakedLBTCStorage(); address prevValue = $.treasury; $.treasury = newValue; emit TreasuryAddressChanged(prevValue, newValue); } /// @dev allow zero address to disable Stakings function _changeAssetRouter(address newVal) internal { StakedLBTCStorage storage $ = _getStakedLBTCStorage(); address prevValue = address($.assetRouter); $.assetRouter = IAssetRouter(newVal); emit AssetRouterChanged(prevValue, newVal); } function _changeRedeemFee(uint256 newVal) internal { _getStakedLBTCStorage().assetRouter.changeRedeemFee(newVal); } function _changeRedeemForBtcMinAmount(uint256 newVal) internal { _getStakedLBTCStorage().assetRouter.changeRedeemForBtcMinAmount(newVal); } function _getStakedLBTCStorage() private pure returns (StakedLBTCStorage storage $) { assembly { $.slot := STAKED_LBTC_STORAGE_LOCATION } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol) pragma solidity ^0.8.20; import {OwnableUpgradeable} from "./OwnableUpgradeable.sol"; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is specified at deployment time in the constructor for `Ownable`. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable { /// @custom:storage-location erc7201:openzeppelin.storage.Ownable2Step struct Ownable2StepStorage { address _pendingOwner; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable2Step")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant Ownable2StepStorageLocation = 0x237e158222e3e6968b72b9db0d8043aacf074ad9f650f0d1606b4d82ee432c00; function _getOwnable2StepStorage() private pure returns (Ownable2StepStorage storage $) { assembly { $.slot := Ownable2StepStorageLocation } } event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); function __Ownable2Step_init() internal onlyInitializing { } function __Ownable2Step_init_unchained() internal onlyInitializing { } /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { Ownable2StepStorage storage $ = _getOwnable2StepStorage(); return $._pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { Ownable2StepStorage storage $ = _getOwnable2StepStorage(); $._pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { Ownable2StepStorage storage $ = _getOwnable2StepStorage(); delete $._pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() public virtual { address sender = _msgSender(); if (pendingOwner() != sender) { revert OwnableUnauthorizedAccount(sender); } _transferOwnership(sender); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol"; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is set to the address provided by the deployer. This can * later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { /// @custom:storage-location erc7201:openzeppelin.storage.Ownable struct OwnableStorage { address _owner; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300; function _getOwnableStorage() private pure returns (OwnableStorage storage $) { assembly { $.slot := OwnableStorageLocation } } /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ function __Ownable_init(address initialOwner) internal onlyInitializing { __Ownable_init_unchained(initialOwner); } function __Ownable_init_unchained(address initialOwner) internal onlyInitializing { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { OwnableStorage storage $ = _getOwnableStorage(); return $._owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { OwnableStorage storage $ = _getOwnableStorage(); address oldOwner = $._owner; $._owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.20; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Storage of the initializable contract. * * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions * when using with upgradeable contracts. * * @custom:storage-location erc7201:openzeppelin.storage.Initializable */ struct InitializableStorage { /** * @dev Indicates that the contract has been initialized. */ uint64 _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool _initializing; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00; /** * @dev The contract is already initialized. */ error InvalidInitialization(); /** * @dev The contract is not initializing. */ error NotInitializing(); /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint64 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in * production. * * Emits an {Initialized} event. */ modifier initializer() { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); // Cache values to avoid duplicated sloads bool isTopLevelCall = !$._initializing; uint64 initialized = $._initialized; // Allowed calls: // - initialSetup: the contract is not in the initializing state and no previous version was // initialized // - construction: the contract is initialized at version 1 (no reininitialization) and the // current contract is just being deployed bool initialSetup = initialized == 0 && isTopLevelCall; bool construction = initialized == 1 && address(this).code.length == 0; if (!initialSetup && !construction) { revert InvalidInitialization(); } $._initialized = 1; if (isTopLevelCall) { $._initializing = true; } _; if (isTopLevelCall) { $._initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint64 version) { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing || $._initialized >= version) { revert InvalidInitialization(); } $._initialized = version; $._initializing = true; _; $._initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { _checkInitializing(); _; } /** * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}. */ function _checkInitializing() internal view virtual { if (!_isInitializing()) { revert NotInitializing(); } } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing) { revert InvalidInitialization(); } if ($._initialized != type(uint64).max) { $._initialized = type(uint64).max; emit Initialized(type(uint64).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint64) { return _getInitializableStorage()._initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _getInitializableStorage()._initializing; } /** * @dev Returns a pointer to the storage namespace. */ // solhint-disable-next-line var-name-mixedcase function _getInitializableStorage() private pure returns (InitializableStorage storage $) { assembly { $.slot := INITIALIZABLE_STORAGE } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import {ContextUpgradeable} from "../../utils/ContextUpgradeable.sol"; import {IERC20Errors} from "@openzeppelin/contracts/interfaces/draft-IERC6093.sol"; import {Initializable} from "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. */ abstract contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20, IERC20Metadata, IERC20Errors { /// @custom:storage-location erc7201:openzeppelin.storage.ERC20 struct ERC20Storage { mapping(address account => uint256) _balances; mapping(address account => mapping(address spender => uint256)) _allowances; uint256 _totalSupply; string _name; string _symbol; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC20")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ERC20StorageLocation = 0x52c63247e1f47db19d5ce0460030c497f067ca4cebf71ba98eeadabe20bace00; function _getERC20Storage() private pure returns (ERC20Storage storage $) { assembly { $.slot := ERC20StorageLocation } } /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { ERC20Storage storage $ = _getERC20Storage(); $._name = name_; $._symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { ERC20Storage storage $ = _getERC20Storage(); return $._name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { ERC20Storage storage $ = _getERC20Storage(); return $._symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the default value returned by this function, unless * it's overridden. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual returns (uint256) { ERC20Storage storage $ = _getERC20Storage(); return $._totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual returns (uint256) { ERC20Storage storage $ = _getERC20Storage(); return $._balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `value`. */ function transfer(address to, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _transfer(owner, to, value); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual returns (uint256) { ERC20Storage storage $ = _getERC20Storage(); return $._allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, value); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `value`. * - the caller must have allowance for ``from``'s tokens of at least * `value`. */ function transferFrom(address from, address to, uint256 value) public virtual returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, value); _transfer(from, to, value); return true; } /** * @dev Moves a `value` amount of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _transfer(address from, address to, uint256 value) internal { if (from == address(0)) { revert ERC20InvalidSender(address(0)); } if (to == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(from, to, value); } /** * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from` * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding * this function. * * Emits a {Transfer} event. */ function _update(address from, address to, uint256 value) internal virtual { ERC20Storage storage $ = _getERC20Storage(); if (from == address(0)) { // Overflow check required: The rest of the code assumes that totalSupply never overflows $._totalSupply += value; } else { uint256 fromBalance = $._balances[from]; if (fromBalance < value) { revert ERC20InsufficientBalance(from, fromBalance, value); } unchecked { // Overflow not possible: value <= fromBalance <= totalSupply. $._balances[from] = fromBalance - value; } } if (to == address(0)) { unchecked { // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply. $._totalSupply -= value; } } else { unchecked { // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256. $._balances[to] += value; } } emit Transfer(from, to, value); } /** * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0). * Relies on the `_update` mechanism * * Emits a {Transfer} event with `from` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _mint(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(address(0), account, value); } /** * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply. * Relies on the `_update` mechanism. * * Emits a {Transfer} event with `to` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead */ function _burn(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidSender(address(0)); } _update(account, address(0), value); } /** * @dev Sets `value` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address owner, address spender, uint256 value) internal { _approve(owner, spender, value, true); } /** * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event. * * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any * `Approval` event during `transferFrom` operations. * * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to * true using the following override: * ``` * function _approve(address owner, address spender, uint256 value, bool) internal virtual override { * super._approve(owner, spender, value, true); * } * ``` * * Requirements are the same as {_approve}. */ function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual { ERC20Storage storage $ = _getERC20Storage(); if (owner == address(0)) { revert ERC20InvalidApprover(address(0)); } if (spender == address(0)) { revert ERC20InvalidSpender(address(0)); } $._allowances[owner][spender] = value; if (emitEvent) { emit Approval(owner, spender, value); } } /** * @dev Updates `owner` s allowance for `spender` based on spent `value`. * * Does not update the allowance value in case of infinite allowance. * Revert if not enough allowance is available. * * Does not emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 value) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { if (currentAllowance < value) { revert ERC20InsufficientAllowance(spender, currentAllowance, value); } unchecked { _approve(owner, spender, currentAllowance - value, false); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/ERC20Pausable.sol) pragma solidity ^0.8.20; import {ERC20Upgradeable} from "../ERC20Upgradeable.sol"; import {PausableUpgradeable} from "../../../utils/PausableUpgradeable.sol"; import {Initializable} from "../../../proxy/utils/Initializable.sol"; /** * @dev ERC20 token with pausable token transfers, minting and burning. * * Useful for scenarios such as preventing trades until the end of an evaluation * period, or having an emergency switch for freezing all token transfers in the * event of a large bug. * * IMPORTANT: This contract does not include public pause and unpause functions. In * addition to inheriting this contract, you must define both functions, invoking the * {Pausable-_pause} and {Pausable-_unpause} internal functions, with appropriate * access control, e.g. using {AccessControl} or {Ownable}. Not doing so will * make the contract pause mechanism of the contract unreachable, and thus unusable. */ abstract contract ERC20PausableUpgradeable is Initializable, ERC20Upgradeable, PausableUpgradeable { function __ERC20Pausable_init() internal onlyInitializing { __Pausable_init_unchained(); } function __ERC20Pausable_init_unchained() internal onlyInitializing { } /** * @dev See {ERC20-_update}. * * Requirements: * * - the contract must not be paused. */ function _update(address from, address to, uint256 value) internal virtual override whenNotPaused { super._update(from, to, value); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/ERC20Permit.sol) pragma solidity ^0.8.20; import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol"; import {ERC20Upgradeable} from "../ERC20Upgradeable.sol"; import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; import {EIP712Upgradeable} from "../../../utils/cryptography/EIP712Upgradeable.sol"; import {NoncesUpgradeable} from "../../../utils/NoncesUpgradeable.sol"; import {Initializable} from "../../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ abstract contract ERC20PermitUpgradeable is Initializable, ERC20Upgradeable, IERC20Permit, EIP712Upgradeable, NoncesUpgradeable { bytes32 private constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); /** * @dev Permit deadline has expired. */ error ERC2612ExpiredSignature(uint256 deadline); /** * @dev Mismatched signature. */ error ERC2612InvalidSigner(address signer, address owner); /** * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`. * * It's a good idea to use the same `name` that is defined as the ERC20 token name. */ function __ERC20Permit_init(string memory name) internal onlyInitializing { __EIP712_init_unchained(name, "1"); } function __ERC20Permit_init_unchained(string memory) internal onlyInitializing {} /** * @inheritdoc IERC20Permit */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual { if (block.timestamp > deadline) { revert ERC2612ExpiredSignature(deadline); } bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline)); bytes32 hash = _hashTypedDataV4(structHash); address signer = ECDSA.recover(hash, v, r, s); if (signer != owner) { revert ERC2612InvalidSigner(signer, owner); } _approve(owner, spender, value); } /** * @inheritdoc IERC20Permit */ function nonces(address owner) public view virtual override(IERC20Permit, NoncesUpgradeable) returns (uint256) { return super.nonces(owner); } /** * @inheritdoc IERC20Permit */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view virtual returns (bytes32) { return _domainSeparatorV4(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/EIP712.sol) pragma solidity ^0.8.20; import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol"; import {IERC5267} from "@openzeppelin/contracts/interfaces/IERC5267.sol"; import {Initializable} from "../../proxy/utils/Initializable.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose * encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract * does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to * produce the hash of their typed data using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain * separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the * separator from the immutable values, which is cheaper than accessing a cached version in cold storage. */ abstract contract EIP712Upgradeable is Initializable, IERC5267 { bytes32 private constant TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"); /// @custom:storage-location erc7201:openzeppelin.storage.EIP712 struct EIP712Storage { /// @custom:oz-renamed-from _HASHED_NAME bytes32 _hashedName; /// @custom:oz-renamed-from _HASHED_VERSION bytes32 _hashedVersion; string _name; string _version; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.EIP712")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant EIP712StorageLocation = 0xa16a46d94261c7517cc8ff89f61c0ce93598e3c849801011dee649a6a557d100; function _getEIP712Storage() private pure returns (EIP712Storage storage $) { assembly { $.slot := EIP712StorageLocation } } /** * @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]. */ function __EIP712_init(string memory name, string memory version) internal onlyInitializing { __EIP712_init_unchained(name, version); } function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing { EIP712Storage storage $ = _getEIP712Storage(); $._name = name; $._version = version; // Reset prior values in storage if upgrading $._hashedName = 0; $._hashedVersion = 0; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { return _buildDomainSeparator(); } function _buildDomainSeparator() private view returns (bytes32) { return keccak256(abi.encode(TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash(), block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash); } /** * @dev See {IERC-5267}. */ function eip712Domain() public view virtual returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ) { EIP712Storage storage $ = _getEIP712Storage(); // If the hashed name and version in storage are non-zero, the contract hasn't been properly initialized // and the EIP712 domain is not reliable, as it will be missing name and version. require($._hashedName == 0 && $._hashedVersion == 0, "EIP712: Uninitialized"); return ( hex"0f", // 01111 _EIP712Name(), _EIP712Version(), block.chainid, address(this), bytes32(0), new uint256[](0) ); } /** * @dev The name parameter for the EIP712 domain. * * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs * are a concern. */ function _EIP712Name() internal view virtual returns (string memory) { EIP712Storage storage $ = _getEIP712Storage(); return $._name; } /** * @dev The version parameter for the EIP712 domain. * * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs * are a concern. */ function _EIP712Version() internal view virtual returns (string memory) { EIP712Storage storage $ = _getEIP712Storage(); return $._version; } /** * @dev The hash of the name parameter for the EIP712 domain. * * NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Name` instead. */ function _EIP712NameHash() internal view returns (bytes32) { EIP712Storage storage $ = _getEIP712Storage(); string memory name = _EIP712Name(); if (bytes(name).length > 0) { return keccak256(bytes(name)); } else { // If the name is empty, the contract may have been upgraded without initializing the new storage. // We return the name hash in storage if non-zero, otherwise we assume the name is empty by design. bytes32 hashedName = $._hashedName; if (hashedName != 0) { return hashedName; } else { return keccak256(""); } } } /** * @dev The hash of the version parameter for the EIP712 domain. * * NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Version` instead. */ function _EIP712VersionHash() internal view returns (bytes32) { EIP712Storage storage $ = _getEIP712Storage(); string memory version = _EIP712Version(); if (bytes(version).length > 0) { return keccak256(bytes(version)); } else { // If the version is empty, the contract may have been upgraded without initializing the new storage. // We return the version hash in storage if non-zero, otherwise we assume the version is empty by design. bytes32 hashedVersion = $._hashedVersion; if (hashedVersion != 0) { return hashedVersion; } else { return keccak256(""); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Nonces.sol) pragma solidity ^0.8.20; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Provides tracking nonces for addresses. Nonces will only increment. */ abstract contract NoncesUpgradeable is Initializable { /** * @dev The nonce used for an `account` is not the expected current nonce. */ error InvalidAccountNonce(address account, uint256 currentNonce); /// @custom:storage-location erc7201:openzeppelin.storage.Nonces struct NoncesStorage { mapping(address account => uint256) _nonces; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Nonces")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant NoncesStorageLocation = 0x5ab42ced628888259c08ac98db1eb0cf702fc1501344311d8b100cd1bfe4bb00; function _getNoncesStorage() private pure returns (NoncesStorage storage $) { assembly { $.slot := NoncesStorageLocation } } function __Nonces_init() internal onlyInitializing { } function __Nonces_init_unchained() internal onlyInitializing { } /** * @dev Returns the next unused nonce for an address. */ function nonces(address owner) public view virtual returns (uint256) { NoncesStorage storage $ = _getNoncesStorage(); return $._nonces[owner]; } /** * @dev Consumes a nonce. * * Returns the current value and increments nonce. */ function _useNonce(address owner) internal virtual returns (uint256) { NoncesStorage storage $ = _getNoncesStorage(); // For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be // decremented or reset. This guarantees that the nonce never overflows. unchecked { // It is important to do x++ and not ++x here. return $._nonces[owner]++; } } /** * @dev Same as {_useNonce} but checking that `nonce` is the next valid for `owner`. */ function _useCheckedNonce(address owner, uint256 nonce) internal virtual { uint256 current = _useNonce(owner); if (nonce != current) { revert InvalidAccountNonce(owner, current); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol) pragma solidity ^0.8.20; import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol"; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract PausableUpgradeable is Initializable, ContextUpgradeable { /// @custom:storage-location erc7201:openzeppelin.storage.Pausable struct PausableStorage { bool _paused; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Pausable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant PausableStorageLocation = 0xcd5ed15c6e187e77e9aee88184c21f4f2182ab5827cb3b7e07fbedcd63f03300; function _getPausableStorage() private pure returns (PausableStorage storage $) { assembly { $.slot := PausableStorageLocation } } /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); /** * @dev The operation failed because the contract is paused. */ error EnforcedPause(); /** * @dev The operation failed because the contract is not paused. */ error ExpectedPause(); /** * @dev Initializes the contract in unpaused state. */ function __Pausable_init() internal onlyInitializing { __Pausable_init_unchained(); } function __Pausable_init_unchained() internal onlyInitializing { PausableStorage storage $ = _getPausableStorage(); $._paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { PausableStorage storage $ = _getPausableStorage(); return $._paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { if (paused()) { revert EnforcedPause(); } } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { if (!paused()) { revert ExpectedPause(); } } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { PausableStorage storage $ = _getPausableStorage(); $._paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { PausableStorage storage $ = _getPausableStorage(); $._paused = false; emit Unpaused(_msgSender()); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol) pragma solidity ^0.8.20; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuardUpgradeable is Initializable { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant NOT_ENTERED = 1; uint256 private constant ENTERED = 2; /// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard struct ReentrancyGuardStorage { uint256 _status; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00; function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) { assembly { $.slot := ReentrancyGuardStorageLocation } } /** * @dev Unauthorized reentrant call. */ error ReentrancyGuardReentrantCall(); function __ReentrancyGuard_init() internal onlyInitializing { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal onlyInitializing { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); $._status = NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); // On the first call to nonReentrant, _status will be NOT_ENTERED if ($._status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // Any calls to nonReentrant after this point will fail $._status = ENTERED; } function _nonReentrantAfter() private { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) $._status = NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); return $._status == ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol) pragma solidity ^0.8.20; /** * @dev Standard ERC20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens. */ interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender); } /** * @dev Standard ERC721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens. */ interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator); } /** * @dev Standard ERC1155 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens. */ interface IERC1155Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. * @param tokenId Identifier number of a token. */ error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC1155InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC1155InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param owner Address of the current owner of a token. */ error ERC1155MissingApprovalForAll(address operator, address owner); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC1155InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC1155InvalidOperator(address operator); /** * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation. * Used in batch transfers. * @param idsLength Length of the array of token identifiers * @param valuesLength Length of the array of token amounts */ error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1271.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC1271 standard signature validation method for * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271]. */ interface IERC1271 { /** * @dev Should return whether the signature provided is valid for the provided data * @param hash Hash of the data to be signed * @param signature Signature byte array associated with _data */ function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol) pragma solidity ^0.8.20; interface IERC5267 { /** * @dev MAY be emitted to signal that the domain could have changed. */ event EIP712DomainChanged(); /** * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712 * signature. */ function eip712Domain() external view returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. * * CAUTION: See Security Considerations above. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @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 value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` 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 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC20Permit} from "../extensions/IERC20Permit.sol"; import {Address} from "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev An operation with an ERC20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value))); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value))); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @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 or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * 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. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @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`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) 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 FailedInnerCall(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.20; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS } /** * @dev The signature derives the `address(0)`. */ error ECDSAInvalidSignature(); /** * @dev The signature has an invalid length. */ error ECDSAInvalidSignatureLength(uint256 length); /** * @dev The signature has an S value that is in the upper half order. */ error ECDSAInvalidSignatureS(bytes32 s); /** * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not * return address(0) without also returning an error description. Errors are documented using an enum (error type) * and a bytes32 providing additional information about the error. * * If no error is returned, then the address can be used for verification purposes. * * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length)); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature); _throwError(error, errorArg); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] */ function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) { unchecked { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); // We do not check for an overflow here since the shift operation results in 0 or 1. uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. */ function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs); _throwError(error, errorArg); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError, bytes32) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS, s); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature, bytes32(0)); } return (signer, RecoverError.NoError, bytes32(0)); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s); _throwError(error, errorArg); return recovered; } /** * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided. */ function _throwError(RecoverError error, bytes32 errorArg) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert ECDSAInvalidSignature(); } else if (error == RecoverError.InvalidSignatureLength) { revert ECDSAInvalidSignatureLength(uint256(errorArg)); } else if (error == RecoverError.InvalidSignatureS) { revert ECDSAInvalidSignatureS(errorArg); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol) pragma solidity ^0.8.20; import {Strings} from "../Strings.sol"; /** * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing. * * The library provides methods for generating a hash of a message that conforms to the * https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712] * specifications. */ library MessageHashUtils { /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x45` (`personal_sign` messages). * * The digest is calculated by prefixing a bytes32 `messageHash` with * `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. * * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with * keccak256, although any bytes32 value can be safely used because the final digest will * be re-hashed. * * See {ECDSA-recover}. */ function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) { /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20) } } /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x45` (`personal_sign` messages). * * The digest is calculated by prefixing an arbitrary `message` with * `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. * * See {ECDSA-recover}. */ function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) { return keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message)); } /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x00` (data with intended validator). * * The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended * `validator` address. Then hashing the result. * * See {ECDSA-recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked(hex"19_00", validator, data)); } /** * @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`). * * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with * `\x19\x01` and hashing the result. It corresponds to the hash signed by the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712. * * See {ECDSA-recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, hex"19_01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) digest := keccak256(ptr, 0x42) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol) pragma solidity ^0.8.20; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Muldiv operation overflow. */ error MathOverflowedMulDiv(); enum Rounding { Floor, // Toward negative infinity Ceil, // Toward positive infinity Trunc, // Toward zero Expand // Away from zero } /** * @dev Returns the addition of two unsigned integers, with an overflow flag. */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an overflow flag. */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds towards infinity instead * of rounding towards zero. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { if (b == 0) { // Guarantee the same behavior as in a regular Solidity division. return a / b; } // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or * denominator == 0. * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by * Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0 = x * y; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. if (denominator <= prod1) { revert MathOverflowedMulDiv(); } /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. // Always >= 1. See https://cs.stackexchange.com/q/138556/92363. uint256 twos = denominator & (0 - denominator); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also // works in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded * towards zero. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256 of a positive value rounded towards zero. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0); } } /** * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers. */ function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) { return uint8(rounding) % 2 == 1; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.20; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol) pragma solidity ^0.8.20; import {Math} from "./math/Math.sol"; import {SignedMath} from "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant HEX_DIGITS = "0123456789abcdef"; uint8 private constant ADDRESS_LENGTH = 20; /** * @dev The `value` string doesn't fit in the specified `length`. */ error StringsInsufficientHexLength(uint256 value, uint256 length); /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), HEX_DIGITS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toStringSigned(int256 value) internal pure returns (string memory) { return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { uint256 localValue = value; bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = HEX_DIGITS[localValue & 0xf]; localValue >>= 4; } if (localValue != 0) { revert StringsInsufficientHexLength(value, length); } return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal * representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // Compatible with OpenZeppelin Contracts ^5.0.0 pragma solidity 0.8.24; /// Interface of the Bascule contract as used by on-chain contracts. /// @custom:security-contact [email protected] interface IBascule { /** * Event emitted when a withdrawal is validated. * @param withdrawalAmount Amount of the withdrawal. * @param depositID Unique identifier for a deposit that took place on another chain and was withdrawn on this chain. */ event WithdrawalValidated(bytes32 depositID, uint256 withdrawalAmount); /** * Error on attempt to withdraw an already withdrawn deposit. * @param depositID Unique identifier for deposit that failed validation. * @param withdrawalAmount Amount of the withdrawal. */ error AlreadyWithdrawn(bytes32 depositID, uint256 withdrawalAmount); /** * Error when a withdrawal fails validation. * This means the corresponding deposit is not in the map. * @param depositID Unique identifier for deposit that failed validation. * @param withdrawalAmount Amount of the withdrawal. */ error WithdrawalFailedValidation( bytes32 depositID, uint256 withdrawalAmount ); /** * Validate a withdrawal (before executing it) if the amount is above * threshold. * * This function checks if our accounting has recorded a deposit that * corresponds to this withdrawal request. A deposit can only be withdrawn * once. * * @param depositID Unique identifier of the deposit on another chain. * @param withdrawalAmount Amount of the withdrawal. * * Emits {WithdrawalValidated}. */ function validateWithdrawal( bytes32 depositID, uint256 withdrawalAmount ) external; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; interface INotaryConsortium { /// @dev Error thrown when signature payload is already used error PayloadAlreadyUsed(); /// @dev Error thrown when signatures length is not equal to signers length error LengthMismatch(); /// @dev Error thrown when there are not enough signatures error NotEnoughSignatures(); /// @dev Error thrown when unexpected action is used error UnexpectedAction(bytes4 action); /// @dev Event emitted when the validator set is updated event ValidatorSetUpdated( uint256 indexed epoch, address[] validators, uint256[] weights, uint256 threshold ); /// @dev Error thrown when validator set already set error ValSetAlreadySet(); /// @dev Error thrown when no validator set is set error NoValidatorSet(); /// @dev Error thrown when invalid epoch is provided error InvalidEpoch(); function checkProof( bytes32 _payloadHash, bytes calldata _proof ) external view; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; interface IMailbox { error Mailbox_ZeroChainId(); error Mailbox_ZeroConsortium(); error Mailbox_ZeroMailbox(); error Mailbox_ZeroRecipient(); error Mailbox_ZeroAmount(); error Mailbox_MessagePathEnabled(bytes32 id); error Mailbox_MessagePathDisabled(bytes32 id); error Mailbox_UnexpectedDestinationCaller(address expected, address actual); error Mailbox_HandlerNotImplemented(); error Mailbox_PayloadOversize(uint32 max, uint256 actual); error Mailbox_NotEnoughFee(uint256 expected, uint256 actual); error Mailbox_CallFailed(); event MessagePathEnabled( bytes32 indexed destinationChain, bytes32 indexed inboundMessagePath, bytes32 indexed outboundMessagePath, bytes32 destinationMailbox ); event MessagePathDisabled( bytes32 indexed destinationChain, bytes32 indexed inboundMessagePath, bytes32 indexed outboundMessagePath, bytes32 destinationMailbox ); event MessageSent( bytes32 indexed destinationLChainId, address indexed msgSender, bytes32 indexed recipient, bytes payload ); /// Message payment receipt event MessagePaid( bytes32 indexed payloadHash, address indexed msgSender, uint256 payloadSize, uint256 value ); event MessageDelivered( bytes32 indexed payloadHash, address indexed caller, uint256 indexed nonce, bytes32 msgSender, bytes payload ); event MessageHandled( bytes32 indexed payloadHash, address indexed destinationCaller, bytes executionResult ); event MessageHandleError( bytes32 indexed payloadHash, address indexed destinationCaller, string reason, bytes customError ); event SenderConfigUpdated( address indexed sender, uint64 maxPayloadSize, bool feeDisabled ); event DefaultPayloadSizeSet(uint64 maxPayloadSize); event FeePerByteSet(uint256 fee); event FeeWithdrawn(address indexed treasury, uint256 amount); function getFee( address sender, bytes calldata body ) external view returns (uint256); function getInboundMessagePath( bytes32 pathId ) external view returns (bytes32); function send( bytes32 destinationChain, bytes32 recipient, bytes32 destinationCaller, bytes calldata body ) external payable returns (uint256, bytes32); function deliverAndHandle( bytes calldata rawPayload, bytes calldata proof ) external returns (bytes32, bool, bytes memory); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {ERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol"; import {ERC20PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC20PausableUpgradeable.sol"; import {ERC20PermitUpgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC20PermitUpgradeable.sol"; import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol"; import {Math} from "@openzeppelin/contracts/utils/math/Math.sol"; import {EIP1271SignatureUtils} from "../libs/EIP1271SignatureUtils.sol"; import {IBaseLBTC} from "./interfaces/IBaseLBTC.sol"; import {Assert} from "./libraries/Assert.sol"; import {Actions} from "../libs/Actions.sol"; /** * @title Abstract bridge adapter * @author Lombard.finance * @notice Implements basic communication with Bridge contract. * Should be extended with business logic of bridging protocols (e.g. CCIP, LayerZero). */ abstract contract BaseLBTC is IBaseLBTC, ERC20PausableUpgradeable, ERC20PermitUpgradeable, ReentrancyGuardUpgradeable { // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC20")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ERC20StorageLocation = 0x52c63247e1f47db19d5ce0460030c497f067ca4cebf71ba98eeadabe20bace00; // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.EIP712")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant EIP712StorageLocation = 0xa16a46d94261c7517cc8ff89f61c0ce93598e3c849801011dee649a6a557d100; function getFeeDigest( uint256 fee, uint256 expiry ) external view virtual returns (bytes32) { return _hashTypedDataV4( keccak256( abi.encode( Actions.FEE_APPROVAL_EIP712_ACTION, block.chainid, fee, expiry ) ) ); } function _batchMint( address[] calldata to, uint256[] calldata amount ) internal { Assert.equalLength(to.length, amount.length); for (uint256 i; i < to.length; ++i) { _mint(to[i], amount[i]); } } function _changeNameAndSymbol( string memory name_, string memory symbol_ ) internal { ERC20Storage storage $ = _getERC20Storage_(); $._name = name_; $._symbol = symbol_; EIP712Storage storage $_ = _getEIP712Storage_(); $_._name = name_; emit NameAndSymbolChanged(name_, symbol_); } function _getERC20Storage_() private pure returns (ERC20Storage storage $) { assembly { $.slot := ERC20StorageLocation } } function _getEIP712Storage_() private pure returns (EIP712Storage storage $) { assembly { $.slot := EIP712StorageLocation } } /** * @dev Override of the _update function to satisfy both ERC20Upgradeable and ERC20PausableUpgradeable */ function _update( address from, address to, uint256 value ) internal virtual override(ERC20Upgradeable, ERC20PausableUpgradeable) { super._update(from, to, value); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {IBascule} from "../../bascule/interfaces/IBascule.sol"; import {IMailbox} from "../../gmp/IMailbox.sol"; import {IOracle} from "../interfaces/IOracle.sol"; interface IAssetRouter { // Describes types of possible routes. UNKNOWN means no route or disabled route enum RouteType { UNKNOWN, // unknown must be '0' DEPOSIT, REDEEM } error AssetRouter_ZeroMailbox(); error AssetRouter_MailboxExpected(); error AssetRouter_PayloadAlreadyUsed(); error AssetRouter_ZeroAddress(); error AssetRouter_Unauthorized(); error AssetRouter_WrongOperation(); error AssetRouter_WrongSender(); error AssetRouter_WrongNativeToken(); error AssetRouter_MintProcessingError(); error AssetRouter_FeeGreaterThanAmount(); error AssertRouter_UnauthorizedAccount(); error AssertRouter_WrongRedeemDestinationChain(); error AssertRouter_WrongRouteType(); error AssertRouter_WrongToken(); event AssetRouter_FeeCharged(uint256 indexed fee, bytes userSignature); event AssetRouter_RedeemFeeChanged( address indexed token, uint256 oldFee, uint256 newFee ); event AssetRouter_RedeemForBtcMinAmountChanged( address indexed token, uint256 oldMinAmount, uint256 newMinAmount ); event AssetRouter_RedeemEnabled(address indexed token, bool enabled); event AssetRouter_RouteSet( bytes32 indexed fromToken, bytes32 indexed fromChainId, bytes32 indexed toToken, bytes32 toChainId, RouteType routeType ); event AssetRouter_RouteRemoved( bytes32 indexed fromToken, bytes32 indexed fromChainId, bytes32 indexed toToken, bytes32 toChainId ); event AssetRouter_BasculeChanged( address indexed prevVal, address indexed newVal ); event AssetRouter_OracleChanged( address indexed prevVal, address indexed newVal ); event AssetRouter_MailboxChanged( address indexed prevVal, address indexed newVal ); event AssetRouter_MintFeeChanged( uint256 indexed oldFee, uint256 indexed newFee ); event AssetRouter_ToNativeCommissionChanged( uint256 indexed oldCommission, uint256 indexed newCommission ); event AssetRouter_NativeTokenChanged( address indexed oldAddress, address indexed newAddress ); event AssetRouter_BatchMintError( bytes32 indexed payloadHash, string reason, bytes customError ); event AssetRouter_DustFeeRateChanged( uint256 indexed oldRate, uint256 indexed newRate ); function getRouteType( bytes32 fromToken, bytes32 fromChainId, bytes32 toChainId, bytes32 toToken ) external view returns (RouteType); function maxMintCommission(address token) external view returns (uint256); function ratio(address token) external view returns (uint256); function getRate(address token) external view returns (uint256); function bitcoinChainId() external view returns (bytes32); function bascule() external view returns (IBascule); function oracle(address token) external view returns (IOracle); function mailbox() external view returns (IMailbox); function toNativeCommission(address token) external view returns (uint64); function nativeToken() external view returns (address); function tokenConfig( address token ) external view returns ( uint256 redeemFee, uint256 redeemForBtcMinAmount, bool isRedeemEnabled ); function deposit( bytes32 tolChainId, bytes32 toToken, bytes32 recipient, uint256 amount ) external; function deposit( address fromAddress, address toToken, uint256 amount ) external; function redeemForBtc( address fromAddress, address fromToken, bytes calldata recipient, uint256 amount ) external; function redeem( address fromAddress, bytes32 tolChainId, address fromToken, bytes32 toToken, bytes32 recipient, uint256 amount ) external; function redeem( address fromAddress, address fromToken, uint256 amount ) external; function mint( bytes calldata rawPayload, bytes calldata proof ) external returns (address); function mintWithFee( bytes calldata mintPayload, bytes calldata proof, bytes calldata feePayload, bytes calldata userSignature ) external; function batchMint( bytes[] calldata payload, bytes[] calldata proof ) external; function batchMintWithFee( bytes[] calldata mintPayload, bytes[] calldata proof, bytes[] calldata feePayload, bytes[] calldata userSignature ) external; function calcUnstakeRequestAmount( address token, bytes calldata scriptPubkey, uint256 amount ) external view returns (uint256 amountAfterFee, bool isAboveDust); function changeRedeemFee(uint256 fee) external; function changeRedeemForBtcMinAmount(uint256 minAmount) external; function toggleRedeem() external; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; interface IBaseLBTC { error RedeemForBtcDisabled(); error PayloadAlreadyUsed(); error InvalidMintAmount(); error AssetRouterNotSet(); event RedeemRequest( address indexed from, uint256 indexed nonce, uint256 amount, uint256 fee, bytes payload ); event RedeemsForBtcEnabled(bool); event NameAndSymbolChanged(string name, string symbol); event ConsortiumChanged(address indexed prevVal, address indexed newVal); event TreasuryAddressChanged( address indexed prevValue, address indexed newValue ); event BurnCommissionChanged( uint64 indexed prevValue, uint64 indexed newValue ); event DustFeeRateChanged(uint256 indexed oldRate, uint256 indexed newRate); event BasculeChanged(address indexed prevVal, address indexed newVal); event FeeCharged(uint256 indexed fee, bytes userSignature); event FeeChanged(uint256 indexed oldFee, uint256 indexed newFee); event RedeemFeeChanged(uint256 indexed oldFee, uint256 indexed newFee); event MintProofConsumed( address indexed recipient, bytes32 indexed payloadHash, bytes payload ); event BatchMintSkipped(bytes32 indexed payloadHash, bytes payload); event AssetRouterChanged(address indexed newVal, address indexed prevVal); function burn(uint256 amount) external; function burn(address from, uint256 amount) external; function mint(address to, uint256 amount) external; function getTreasury() external view returns (address); function getAssetRouter() external view returns (address); function isNative() external view returns (bool); function getRedeemFee() external view returns (uint256); function getFeeDigest( uint256 fee, uint256 expiry ) external view returns (bytes32); function isRedeemsEnabled() external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; interface IOracle { event Oracle_RatioChanged( uint256 prevVal, uint256 newVal, uint256 switchTime ); function ratio() external view returns (uint256); function getRate() external view returns (uint256); function token() external view returns (address); function denomHash() external view returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {IBaseLBTC} from "./IBaseLBTC.sol"; interface IStakedLBTC is IBaseLBTC { error UnauthorizedAccount(address account); event OperatorRoleTransferred( address indexed previousOperator, address indexed newOperator ); event ClaimerUpdated(address indexed claimer, bool isClaimer); event PauserRoleTransferred( address indexed previousPauser, address indexed newPauser ); event MinterUpdated(address indexed minter, bool isMinter); function mint( bytes calldata payload, bytes calldata proof ) external returns (address); function ratio() external view returns (uint256); function getRate() external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {EIP1271SignatureUtils} from "../../libs/EIP1271SignatureUtils.sol"; /// @dev collection of assertions used in ERC20 contracts library Assert { error InvalidDustFeeRate(); error NonEqualLength(uint256 a, uint256 b); error InvalidAction(bytes4 expected, bytes4 actual); error InvalidFeeApprovalSignature(); error ZeroAddress(); function zeroAddress(address addr) internal pure { if (addr == address(0)) revert ZeroAddress(); } function dustFeeRate(uint256 rate) internal pure { if (rate == 0) revert InvalidDustFeeRate(); } function equalLength(uint256 lengthA, uint256 lengthB) internal pure { if (lengthA != lengthB) revert NonEqualLength(lengthA, lengthB); } function selector( bytes calldata payload, bytes4 expectedAction ) internal pure { if (bytes4(payload) != expectedAction) revert InvalidAction(expectedAction, bytes4(payload)); } function feeApproval( bytes32 digest, address recipient, bytes calldata signature ) internal view { if ( !EIP1271SignatureUtils.checkSignature(recipient, digest, signature) ) { revert InvalidFeeApprovalSignature(); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; library Redeem { // bytes4(keccak256("payload(uint256,uint256,bytes32,bytes)") bytes4 internal constant REQUEST_SELECTOR = 0xf86c9e7b; function encodeRequest( uint256 amount, uint256 nonce, bytes calldata script ) internal view returns (bytes memory) { // amount and script already checked during fee calculation return abi.encodeWithSelector( REQUEST_SELECTOR, amount, nonce, bytes32(block.chainid), script ); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {Math} from "@openzeppelin/contracts/utils/math/Math.sol"; import {BitcoinUtils} from "../../libs/BitcoinUtils.sol"; /// @dev collection of validations used in ERC20 contracts library Validation { error AmountLessThanCommission(uint256 fee); error AmountBelowMinLimit(uint256 dustLimit); error ScriptPubkeyUnsupported(); function redeemFee( bytes calldata scriptPubkey, uint256 amount, uint64 fee, uint256 minAmount ) internal pure returns (uint256) { ( uint256 amountAfterFee, bool isAboveFee, bool isAboveMinLimit ) = calcFeeAndDustLimit(scriptPubkey, amount, fee, minAmount); if (!isAboveFee) { revert AmountLessThanCommission(fee); } if (!isAboveMinLimit) { revert AmountBelowMinLimit(minAmount); } return amountAfterFee; } function calcFeeAndDustLimit( bytes calldata scriptPubkey, uint256 amount, uint64 fee, uint256 minAmount ) internal pure returns (uint256, bool, bool) { BitcoinUtils.OutputType outType = BitcoinUtils.getOutputType( scriptPubkey ); if (outType == BitcoinUtils.OutputType.UNSUPPORTED) { revert ScriptPubkeyUnsupported(); } if (amount <= fee) { return (0, false, false); } uint256 amountAfterFee = amount - fee; bool isAboveMinLimit = amountAfterFee >= minAmount; return (amountAfterFee, true, isAboveMinLimit); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; library Actions { /// @dev toChain, recipient, amount, txid are validated struct DepositBtcActionV0 { uint256 toChain; address recipient; uint256 amount; bytes32 txid; uint32 vout; } /// @dev toChain, recipient, amount, txid, token are validated struct DepositBtcActionV1 { uint256 toChain; address recipient; uint256 amount; bytes32 txid; uint32 vout; address token; } struct DepositBridgeAction { uint256 fromChain; bytes32 fromContract; uint256 toChain; address toContract; address recipient; uint64 amount; uint256 nonce; } struct ValSetAction { uint256 epoch; address[] validators; uint256[] weights; uint256 weightThreshold; uint256 height; } struct FeeApprovalAction { uint256 fee; uint256 expiry; } struct RatioUpdate { bytes32 denom; uint256 ratio; uint256 switchTime; } /// @dev Error thrown when invalid public key is provided error InvalidPublicKey(bytes pubKey); /// @dev Error thrown when signatures length is not equal to signers length error Actions_LengthMismatch(); /// @dev Error thrown when threshold is invalid error InvalidThreshold(); /// @dev Error thrown when validator set size is invalid error InvalidValidatorSetSize(); /// @dev Error thrown when zero validator is provided error ZeroValidator(); /// @dev Error thrown when wrong chain id is provided error WrongChainId(); /// @dev Error thrown when wrong contract is provided error WrongContract(); /// @dev Error thrown when zero address is provided error Actions_ZeroAddress(); /// @dev Error thrown when zero amount is provided error ZeroAmount(); /// @dev Error thrown when zero weight is provided error ZeroWeight(); /// @dev Error thrown when fee approval is expired error UserSignatureExpired(uint256 expiry); /// @dev Error thrown when amount is below fee error NotEnoughAmountToUseApproval(); /// @dev Error thrown when zero fee is used error ZeroFee(); /// @dev Error thrown when payload length is too big error InvalidPayloadSize(uint256 expected, uint256 actual); error ZeroTxId(); error InvalidDestinationToken(address expected, address actual); error Actions_ZeroDenom(); error Actions_ZeroRatio(); // bytes4(keccak256("feeApproval(uint256,uint256)")) bytes4 internal constant FEE_APPROVAL_ACTION = 0x8175ca94; // keccak256("feeApproval(uint256 chainId,uint256 fee,uint256 expiry)") bytes32 internal constant FEE_APPROVAL_EIP712_ACTION = 0x40ac9f6aa27075e64c1ed1ea2e831b20b8c25efdeb6b79fd0cf683c9a9c50725; // bytes4(keccak256("payload(bytes32,bytes32,uint64,bytes32,uint32)")) bytes4 internal constant DEPOSIT_BTC_ACTION_V0 = 0xf2e73f7c; // bytes4(keccak256("payload(bytes32,bytes32,uint64,bytes32,uint32,bytes32)")) bytes4 internal constant DEPOSIT_BTC_ACTION_V1 = 0xce25e7c2; // bytes4(keccak256("payload(bytes32,bytes32,bytes32,bytes32,bytes32,uint64,uint256)")) bytes4 internal constant DEPOSIT_BRIDGE_ACTION = 0x5c70a505; // bytes4(keccak256("payload(uint256,bytes[],uint256[],uint256,uint256)")) bytes4 internal constant NEW_VALSET = 0x4aab1d6f; // bytes4(keccak256("payload(bytes32,uint256,uint256)")) bytes4 internal constant RATIO_UPDATE = 0x6c722c2c; /// @dev Maximum number of validators allowed in the consortium. /// @notice This value is determined by the minimum of CometBFT consensus limitations and gas considerations: /// - CometBFT has a hard limit of 10,000 validators (https://docs.cometbft.com/v0.38/spec/core/state) /// - Gas-based calculation: /// - Assumes 4281 gas per ECDSA signature verification /// - Uses a conservative 30 million gas block limit /// - Maximum possible signatures: 30,000,000 / 4,281 ≈ 7007 /// - Reverse calculated for BFT consensus (2/3 + 1): /// 7,007 = (10,509 * 2/3 + 1) rounded down /// - The lower value of 10,000 (CometBFT limit) and 10,509 (gas calculation) is chosen /// @dev This limit ensures compatibility with CometBFT while also considering gas limitations /// for signature verification within a single block. uint256 private constant MAX_VALIDATOR_SET_SIZE = 102; /// @dev Minimum number of validators allowed in the system. /// @notice While set to 1 to allow for non-distributed scenarios, this configuration /// does not provide Byzantine fault tolerance. For a truly distributed and /// fault-tolerant system, a minimum of 4 validators would be recommended to tolerate /// at least one Byzantine fault. uint256 private constant MIN_VALIDATOR_SET_SIZE = 1; /// @dev A constant representing the number of bytes for a slot of information in a payload. uint256 internal constant ABI_SLOT_SIZE = 32; /** * @notice Returns decoded deposit btc msg v0 * @dev Message should not contain the selector * @param payload Body of the mint payload */ function depositBtcV0( bytes memory payload ) internal view returns (DepositBtcActionV0 memory) { if (payload.length != ABI_SLOT_SIZE * 5) revert InvalidPayloadSize(ABI_SLOT_SIZE * 5, payload.length); ( uint256 toChain, address recipient, uint256 amount, bytes32 txid, uint32 vout ) = abi.decode(payload, (uint256, address, uint256, bytes32, uint32)); if (toChain != block.chainid) { revert WrongChainId(); } if (recipient == address(0)) { revert Actions_ZeroAddress(); } if (amount == 0) { revert ZeroAmount(); } if (txid == bytes32(0)) { revert ZeroTxId(); } return DepositBtcActionV0(toChain, recipient, amount, txid, vout); } /** * @notice Returns decoded deposit btc msg v1 * @dev Message should not contain the selector * @param payload Body of the mint payload */ function depositBtcV1( bytes memory payload ) internal view returns (DepositBtcActionV1 memory) { if (payload.length != ABI_SLOT_SIZE * 6) revert InvalidPayloadSize(ABI_SLOT_SIZE * 6, payload.length); ( uint256 toChain, address recipient, uint256 amount, bytes32 txid, uint32 vout, address token ) = abi.decode( payload, (uint256, address, uint256, bytes32, uint32, address) ); if (toChain != block.chainid) { revert WrongChainId(); } if (recipient == address(0)) { revert Actions_ZeroAddress(); } if (amount == 0) { revert ZeroAmount(); } if (txid == bytes32(0)) { revert ZeroTxId(); } if (token != address(this)) { revert InvalidDestinationToken(address(this), token); } return DepositBtcActionV1(toChain, recipient, amount, txid, vout, token); } /** * @notice Returns decoded bridge payload * @dev Payload should not contain the selector * @param payload Body of the burn payload */ function depositBridge( bytes memory payload ) internal view returns (DepositBridgeAction memory) { if (payload.length != ABI_SLOT_SIZE * 7) revert InvalidPayloadSize(ABI_SLOT_SIZE * 7, payload.length); ( uint256 fromChain, bytes32 fromContract, uint256 toChain, address toContract, address recipient, uint64 amount, uint256 nonce ) = abi.decode( payload, (uint256, bytes32, uint256, address, address, uint64, uint256) ); if (toChain != block.chainid) { revert WrongChainId(); } if (recipient == address(0)) { revert Actions_ZeroAddress(); } if (amount == 0) { revert ZeroAmount(); } return DepositBridgeAction( fromChain, fromContract, toChain, toContract, recipient, amount, nonce ); } /** * @notice Returns decoded validator set * @dev Payload should not contain the selector * @param payload Body of the set validators set payload */ function validateValSet( bytes memory payload ) internal pure returns (ValSetAction memory) { ( uint256 epoch, bytes[] memory pubKeys, uint256[] memory weights, uint256 weightThreshold, uint256 height ) = abi.decode( payload, (uint256, bytes[], uint256[], uint256, uint256) ); // Since dynamic arrays can variably insert more slots of data for things such as data length, // offset etc., we will just encode the received variables again and check for a length match. bytes memory reEncodedPayload = abi.encode( epoch, pubKeys, weights, weightThreshold, height ); if (reEncodedPayload.length != payload.length) revert InvalidPayloadSize(payload.length, reEncodedPayload.length); if ( pubKeys.length < MIN_VALIDATOR_SET_SIZE || pubKeys.length > MAX_VALIDATOR_SET_SIZE ) revert InvalidValidatorSetSize(); if (pubKeys.length != weights.length) revert Actions_LengthMismatch(); if (weightThreshold == 0) revert InvalidThreshold(); uint256 sum = 0; for (uint256 i; i < weights.length; ) { if (weights[i] == 0) { revert ZeroWeight(); } sum += weights[i]; unchecked { ++i; } } if (sum < weightThreshold) revert InvalidThreshold(); address[] memory validators = pubKeysToAddress(pubKeys); return ValSetAction(epoch, validators, weights, weightThreshold, height); } function pubKeysToAddress( bytes[] memory _pubKeys ) internal pure returns (address[] memory) { address[] memory addresses = new address[](_pubKeys.length); for (uint256 i; i < _pubKeys.length; ) { // each pubkey represented as uncompressed if (_pubKeys[i].length == 65) { bytes memory data = _pubKeys[i]; // Ensure that first byte of pubkey is 0x04 if (_pubKeys[i][0] != 0x04) revert InvalidPublicKey(_pubKeys[i]); // create a new array with length - 1 (excluding the first 0x04 byte) bytes memory result = new bytes(data.length - 1); // use inline assembly for memory manipulation assembly { // calculate the start of the `result` and `data` in memory let resultData := add(result, 0x20) // points to the first byte of the result let dataStart := add(data, 0x21) // points to the second byte of data (skip 0x04) // copy 64 bytes from input (excluding the first byte) to result mstore(resultData, mload(dataStart)) // copy the first 32 bytes mstore(add(resultData, 0x20), mload(add(dataStart, 0x20))) // copy the next 32 bytes } addresses[i] = address(uint160(uint256(keccak256(result)))); } else { revert InvalidPublicKey(_pubKeys[i]); } unchecked { ++i; } } return addresses; } /** * @notice Returns decoded fee approval * @dev Payload should not contain the selector * @param payload Body of the fee approval payload */ function feeApproval( bytes memory payload ) internal view returns (FeeApprovalAction memory) { if (payload.length != ABI_SLOT_SIZE * 2) revert InvalidPayloadSize(ABI_SLOT_SIZE * 2, payload.length); (uint256 fee, uint256 expiry) = abi.decode(payload, (uint256, uint256)); if (block.timestamp > expiry) { revert UserSignatureExpired(expiry); } if (fee == 0) { revert ZeroFee(); } return FeeApprovalAction(fee, expiry); } /** * @notice Returns decoded ratio update message * @dev Message should not contain the selector * @param payload Body of the ratio update message */ function ratioUpdate( bytes memory payload ) internal pure returns (RatioUpdate memory) { if (payload.length != ABI_SLOT_SIZE * 3) revert InvalidPayloadSize(ABI_SLOT_SIZE * 3, payload.length); (bytes32 denom, uint256 ratio, uint256 timestamp) = abi.decode( payload, (bytes32, uint256, uint256) ); if (denom == bytes32(0)) { revert Actions_ZeroDenom(); } if (ratio == uint256(0)) { revert Actions_ZeroRatio(); } return RatioUpdate(denom, ratio, timestamp); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {Math} from "@openzeppelin/contracts/utils/math/Math.sol"; bytes1 constant OP_0 = 0x00; bytes1 constant OP_1 = 0x51; bytes1 constant OP_DATA_32 = 0x20; bytes1 constant OP_DATA_20 = 0x14; uint256 constant BASE_SPEND_COST = 49; // 32 (txid) + 4 (vout) + 1 (scriptSig size) + 4 (nSequence) + 8 (amount) // Size of inputs spending different output types uint256 constant NON_WITNESS_INPUT_SIZE = 107; // Used for non-witness outputs (P2PKH, P2SH) uint256 constant WITNESS_INPUT_SIZE = 26; // floor(107 / 4), used for witness outputs (P2WPKH, P2WSH, P2TR) library BitcoinUtils { enum OutputType { UNSUPPORTED, P2TR, P2WPKH, P2WSH } uint256 public constant DEFAULT_DUST_FEE_RATE = 3000; // Default value - 3 satoshis per byte function getOutputType( bytes calldata scriptPubkey ) internal pure returns (OutputType) { if ( scriptPubkey.length == 22 && scriptPubkey[0] == OP_0 && scriptPubkey[1] == OP_DATA_20 ) { return OutputType.P2WPKH; } if ( scriptPubkey.length == 34 && scriptPubkey[0] == OP_1 && scriptPubkey[1] == OP_DATA_32 ) { return OutputType.P2TR; } if ( scriptPubkey.length == 34 && scriptPubkey[0] == OP_0 && scriptPubkey[1] == OP_DATA_32 ) { return OutputType.P2WSH; } return OutputType.UNSUPPORTED; } /// @notice Compute the dust limit for a given Bitcoin script public key /// @dev The dust limit is the minimum payment to an address that is considered /// spendable under consensus rules. This function is based on Bitcoin Core's /// implementation. /// @param scriptPubkey The Bitcoin script public key as a byte array /// @param dustFeeRate The current dust fee rate (in satoshis per 1000 bytes) /// @return dustLimit The calculated dust limit in satoshis /// @custom:reference https://github.com/bitcoin/bitcoin/blob/43740f4971f45cd5499470b6a085b3ecd8b96d28/src/policy/policy.cpp#L54 function getDustLimitForOutput( OutputType outType, bytes calldata scriptPubkey, uint256 dustFeeRate ) internal pure returns (uint256 dustLimit) { uint256 spendCost = BASE_SPEND_COST; if ( outType == OutputType.P2TR || outType == OutputType.P2WPKH || outType == OutputType.P2WSH ) { // witness v0 and v1 has a cheaper payment formula spendCost += WITNESS_INPUT_SIZE; // The current addition creates a discrepancy of 1, and our final value should be 98 bytes. // Thus, we add 1 here. spendCost += 1; } else { spendCost += NON_WITNESS_INPUT_SIZE; } spendCost += scriptPubkey.length; // Calculate dust limit dustLimit = Math.ceilDiv(spendCost * dustFeeRate, 1000); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {IERC1271} from "@openzeppelin/contracts/interfaces/IERC1271.sol"; import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; /** * @title Library of utilities for making EIP1271-compliant signature checks. * @author Lombard.Finance * @notice The contracts is a part of Lombard.Finace protocol */ library EIP1271SignatureUtils { // bytes4(keccak256("isValidSignature(bytes32,bytes)") bytes4 internal constant EIP1271_MAGICVALUE = 0x1626ba7e; bytes4 internal constant EIP1271_WRONGVALUE = 0xffffffff; /** * @notice Checks @param signature is a valid signature of @param digest from @param signer. * If the `signer` contains no code -- i.e. it is not (yet, at least) a contract address, then checks using standard ECDSA logic * Otherwise, passes on the signature to the signer to verify the signature and checks that it returns the `EIP1271_MAGICVALUE`. */ function checkSignature( address signer, bytes32 digest, bytes memory signature ) internal view returns (bool) { if (signer.code.length != 0) { if ( IERC1271(signer).isValidSignature(digest, signature) != EIP1271_MAGICVALUE ) { return false; } } else { if (ECDSA.recover(digest, signature) != signer) { return false; } } return true; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "paris", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
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Contract ABI
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Contract Creation Code
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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.