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Contract Name:
AtomicLockContract
Compiler Version
v0.8.20+commit.a1b79de6
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "../Permissions.sol"; import "../ReqHelpers.sol"; contract AtomicLockContract is Permissions, ReqHelpers, UUPSUpgradeable { using SafeERC20 for IERC20; mapping(address => uint256) public lockedBalanceOf; mapping(bytes32 => address) public proposedLock; mapping(bytes32 => address) public proposedUnlock; function initialize(address _admin, address _vault, address proposer, address[] calldata executors, uint256 threshold) public initializer { _initAdmin(_admin); _initVault(_vault); _addProposer(proposer); _initExecutors(executors, threshold); } function _authorizeUpgrade(address newImplementation) internal override onlyAdmin {} function addToken(uint8 tokenIndex, address tokenAddr) external onlyAdmin { _addToken(tokenIndex, tokenAddr); } function removeToken(uint8 tokenIndex) external onlyAdmin { _removeToken(tokenIndex); } event TokenLockProposed(bytes32 indexed reqId, address indexed proposer); event TokenLockExecuted(bytes32 indexed reqId, address indexed proposer); event TokenLockCancelled(bytes32 indexed reqId, address indexed proposer); function proposeLock(bytes32 reqId) payable external fromChainOnly(reqId) { _createdTimeFrom(reqId, true); uint8 action = _actionFrom(reqId); require(action & 0x0f == 1, "Invalid action; not lock-mint"); require(proposedLock[reqId] == address(0), "Invalid reqId"); address proposer = msg.sender; require(proposer > address(1), "Invalid proposer"); uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); if (tokenAddr == address(1)) { require(msg.value >= amount, "Transferred amount (tx.value) insufficient"); } proposedLock[reqId] = proposer; if (action & 0x10 > 0) { address vault = getVault(); require(vault != address(0), "Vault not activated"); if (tokenAddr == address(1)) { (bool success, ) = vault.call{value: amount}(""); require(success, "Transfer failed"); } else { IERC20(tokenAddr).safeTransferFrom(proposer, vault, amount); } } else if (tokenAddr != address(1)) { IERC20(tokenAddr).safeTransferFrom(proposer, address(this), amount); } emit TokenLockProposed(reqId, proposer); } receive() external payable {} function executeLock(bytes32 reqId, bytes32[] memory r, bytes32[] memory yParityAndS, address[] memory executors, uint256 exeIndex) external { address proposer = proposedLock[reqId]; require(proposer > address(1), "Invalid reqId"); bytes32 digest = _digestFromReqSigningMessage(reqId); _checkMultiSignatures(digest, r, yParityAndS, executors, exeIndex); proposedLock[reqId] = address(1); uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); lockedBalanceOf[tokenAddr] += amount; emit TokenLockExecuted(reqId, proposer); } function cancelLock(bytes32 reqId) external { address proposer = proposedLock[reqId]; require(proposer > address(1), "Invalid reqId"); require(block.timestamp > _createdTimeFrom(reqId, false) + EXPIRE_PERIOD, "Wait until expired to cancel"); delete proposedLock[reqId]; uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); if (tokenAddr == address(1)) { (bool success, ) = proposer.call{value: amount}(""); require(success, "Transfer failed"); } else { address vault; if (_actionFrom(reqId) & 0x10 > 0) { vault = getVault(); } if (vault == address(0)) { IERC20(tokenAddr).safeTransfer(proposer, amount); } else { IERC20(tokenAddr).safeTransferFrom(vault, proposer, amount); } } emit TokenLockCancelled(reqId, proposer); } event TokenUnlockProposed(bytes32 indexed reqId, address indexed recipient); event TokenUnlockExecuted(bytes32 indexed reqId, address indexed recipient); event TokenUnlockCancelled(bytes32 indexed reqId, address indexed recipient); function proposeUnlock(bytes32 reqId, address recipient) external onlyProposer fromChainOnly(reqId) { _createdTimeFrom(reqId, true); require(_actionFrom(reqId) & 0x0f == 2, "Invalid action; not burn-unlock"); require(proposedUnlock[reqId] == address(0), "Invalid reqId"); require(recipient > address(1), "Invalid recipient"); uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); lockedBalanceOf[tokenAddr] -= amount; proposedUnlock[reqId] = recipient; emit TokenUnlockProposed(reqId, recipient); } function executeUnlock(bytes32 reqId, bytes32[] memory r, bytes32[] memory yParityAndS, address[] memory executors, uint256 exeIndex) external { address recipient = proposedUnlock[reqId]; require(recipient > address(1), "Invalid reqId"); bytes32 digest = _digestFromReqSigningMessage(reqId); _checkMultiSignatures(digest, r, yParityAndS, executors, exeIndex); proposedUnlock[reqId] = address(1); uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); if (tokenAddr == address(1)) { (bool success, ) = recipient.call{value: amount}(""); require(success, "Transfer failed"); } else { address vault; if (_actionFrom(reqId) & 0x10 > 0) { vault = getVault(); } if (vault == address(0)) { IERC20(tokenAddr).safeTransfer(recipient, amount); } else { IERC20(tokenAddr).safeTransferFrom(vault, recipient, amount); } } emit TokenUnlockExecuted(reqId, recipient); } function cancelUnlock(bytes32 reqId) external { address recipient = proposedUnlock[reqId]; require(recipient > address(1), "Invalid reqId"); require(block.timestamp > _createdTimeFrom(reqId, false) + EXPIRE_EXTRA_PERIOD, "Wait until expired to cancel"); delete proposedUnlock[reqId]; uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); lockedBalanceOf[tokenAddr] += amount; emit TokenUnlockCancelled(reqId, recipient); } }
// 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) (proxy/utils/UUPSUpgradeable.sol) pragma solidity ^0.8.20; import {IERC1822Proxiable} from "@openzeppelin/contracts/interfaces/draft-IERC1822.sol"; import {ERC1967Utils} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Utils.sol"; import {Initializable} from "./Initializable.sol"; /** * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy. * * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing * `UUPSUpgradeable` with a custom implementation of upgrades. * * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism. */ abstract contract UUPSUpgradeable is Initializable, IERC1822Proxiable { /// @custom:oz-upgrades-unsafe-allow state-variable-immutable address private immutable __self = address(this); /** * @dev The version of the upgrade interface of the contract. If this getter is missing, both `upgradeTo(address)` * and `upgradeToAndCall(address,bytes)` are present, and `upgradeTo` must be used if no function should be called, * while `upgradeToAndCall` will invoke the `receive` function if the second argument is the empty byte string. * If the getter returns `"5.0.0"`, only `upgradeToAndCall(address,bytes)` is present, and the second argument must * be the empty byte string if no function should be called, making it impossible to invoke the `receive` function * during an upgrade. */ string public constant UPGRADE_INTERFACE_VERSION = "5.0.0"; /** * @dev The call is from an unauthorized context. */ error UUPSUnauthorizedCallContext(); /** * @dev The storage `slot` is unsupported as a UUID. */ error UUPSUnsupportedProxiableUUID(bytes32 slot); /** * @dev Check that the execution is being performed through a delegatecall call and that the execution context is * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to * fail. */ modifier onlyProxy() { _checkProxy(); _; } /** * @dev Check that the execution is not being performed through a delegate call. This allows a function to be * callable on the implementing contract but not through proxies. */ modifier notDelegated() { _checkNotDelegated(); _; } function __UUPSUpgradeable_init() internal onlyInitializing { } function __UUPSUpgradeable_init_unchained() internal onlyInitializing { } /** * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the * implementation. It is used to validate the implementation's compatibility when performing an upgrade. * * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier. */ function proxiableUUID() external view virtual notDelegated returns (bytes32) { return ERC1967Utils.IMPLEMENTATION_SLOT; } /** * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call * encoded in `data`. * * Calls {_authorizeUpgrade}. * * Emits an {Upgraded} event. * * @custom:oz-upgrades-unsafe-allow-reachable delegatecall */ function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy { _authorizeUpgrade(newImplementation); _upgradeToAndCallUUPS(newImplementation, data); } /** * @dev Reverts if the execution is not performed via delegatecall or the execution * context is not of a proxy with an ERC1967-compliant implementation pointing to self. * See {_onlyProxy}. */ function _checkProxy() internal view virtual { if ( address(this) == __self || // Must be called through delegatecall ERC1967Utils.getImplementation() != __self // Must be called through an active proxy ) { revert UUPSUnauthorizedCallContext(); } } /** * @dev Reverts if the execution is performed via delegatecall. * See {notDelegated}. */ function _checkNotDelegated() internal view virtual { if (address(this) != __self) { // Must not be called through delegatecall revert UUPSUnauthorizedCallContext(); } } /** * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by * {upgradeToAndCall}. * * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}. * * ```solidity * function _authorizeUpgrade(address) internal onlyOwner {} * ``` */ function _authorizeUpgrade(address newImplementation) internal virtual; /** * @dev Performs an implementation upgrade with a security check for UUPS proxies, and additional setup call. * * As a security check, {proxiableUUID} is invoked in the new implementation, and the return value * is expected to be the implementation slot in ERC1967. * * Emits an {IERC1967-Upgraded} event. */ function _upgradeToAndCallUUPS(address newImplementation, bytes memory data) private { try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) { if (slot != ERC1967Utils.IMPLEMENTATION_SLOT) { revert UUPSUnsupportedProxiableUUID(slot); } ERC1967Utils.upgradeToAndCall(newImplementation, data); } catch { // The implementation is not UUPS revert ERC1967Utils.ERC1967InvalidImplementation(newImplementation); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC1822.sol) pragma solidity ^0.8.20; /** * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified * proxy whose upgrades are fully controlled by the current implementation. */ interface IERC1822Proxiable { /** * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation * address. * * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this * function revert if invoked through a proxy. */ function proxiableUUID() external view returns (bytes32); }
// 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) (proxy/beacon/IBeacon.sol) pragma solidity ^0.8.20; /** * @dev This is the interface that {BeaconProxy} expects of its beacon. */ interface IBeacon { /** * @dev Must return an address that can be used as a delegate call target. * * {UpgradeableBeacon} will check that this address is a contract. */ function implementation() external view returns (address); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (proxy/ERC1967/ERC1967Proxy.sol) pragma solidity ^0.8.20; import {Proxy} from "../Proxy.sol"; import {ERC1967Utils} from "./ERC1967Utils.sol"; /** * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an * implementation address that can be changed. This address is stored in storage in the location specified by * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the * implementation behind the proxy. */ contract ERC1967Proxy is Proxy { /** * @dev Initializes the upgradeable proxy with an initial implementation specified by `implementation`. * * If `_data` is nonempty, it's used as data in a delegate call to `implementation`. This will typically be an * encoded function call, and allows initializing the storage of the proxy like a Solidity constructor. * * Requirements: * * - If `data` is empty, `msg.value` must be zero. */ constructor(address implementation, bytes memory _data) payable { ERC1967Utils.upgradeToAndCall(implementation, _data); } /** * @dev Returns the current implementation address. * * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call. * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` */ function _implementation() internal view virtual override returns (address) { return ERC1967Utils.getImplementation(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (proxy/ERC1967/ERC1967Utils.sol) pragma solidity ^0.8.20; import {IBeacon} from "../beacon/IBeacon.sol"; import {Address} from "../../utils/Address.sol"; import {StorageSlot} from "../../utils/StorageSlot.sol"; /** * @dev This abstract contract provides getters and event emitting update functions for * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots. */ library ERC1967Utils { // We re-declare ERC-1967 events here because they can't be used directly from IERC1967. // This will be fixed in Solidity 0.8.21. At that point we should remove these events. /** * @dev Emitted when the implementation is upgraded. */ event Upgraded(address indexed implementation); /** * @dev Emitted when the admin account has changed. */ event AdminChanged(address previousAdmin, address newAdmin); /** * @dev Emitted when the beacon is changed. */ event BeaconUpgraded(address indexed beacon); /** * @dev Storage slot with the address of the current implementation. * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1. */ // solhint-disable-next-line private-vars-leading-underscore bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; /** * @dev The `implementation` of the proxy is invalid. */ error ERC1967InvalidImplementation(address implementation); /** * @dev The `admin` of the proxy is invalid. */ error ERC1967InvalidAdmin(address admin); /** * @dev The `beacon` of the proxy is invalid. */ error ERC1967InvalidBeacon(address beacon); /** * @dev An upgrade function sees `msg.value > 0` that may be lost. */ error ERC1967NonPayable(); /** * @dev Returns the current implementation address. */ function getImplementation() internal view returns (address) { return StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value; } /** * @dev Stores a new address in the EIP1967 implementation slot. */ function _setImplementation(address newImplementation) private { if (newImplementation.code.length == 0) { revert ERC1967InvalidImplementation(newImplementation); } StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = newImplementation; } /** * @dev Performs implementation upgrade with additional setup call if data is nonempty. * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected * to avoid stuck value in the contract. * * Emits an {IERC1967-Upgraded} event. */ function upgradeToAndCall(address newImplementation, bytes memory data) internal { _setImplementation(newImplementation); emit Upgraded(newImplementation); if (data.length > 0) { Address.functionDelegateCall(newImplementation, data); } else { _checkNonPayable(); } } /** * @dev Storage slot with the admin of the contract. * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1. */ // solhint-disable-next-line private-vars-leading-underscore bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103; /** * @dev Returns the current admin. * * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call. * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103` */ function getAdmin() internal view returns (address) { return StorageSlot.getAddressSlot(ADMIN_SLOT).value; } /** * @dev Stores a new address in the EIP1967 admin slot. */ function _setAdmin(address newAdmin) private { if (newAdmin == address(0)) { revert ERC1967InvalidAdmin(address(0)); } StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin; } /** * @dev Changes the admin of the proxy. * * Emits an {IERC1967-AdminChanged} event. */ function changeAdmin(address newAdmin) internal { emit AdminChanged(getAdmin(), newAdmin); _setAdmin(newAdmin); } /** * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy. * This is the keccak-256 hash of "eip1967.proxy.beacon" subtracted by 1. */ // solhint-disable-next-line private-vars-leading-underscore bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50; /** * @dev Returns the current beacon. */ function getBeacon() internal view returns (address) { return StorageSlot.getAddressSlot(BEACON_SLOT).value; } /** * @dev Stores a new beacon in the EIP1967 beacon slot. */ function _setBeacon(address newBeacon) private { if (newBeacon.code.length == 0) { revert ERC1967InvalidBeacon(newBeacon); } StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon; address beaconImplementation = IBeacon(newBeacon).implementation(); if (beaconImplementation.code.length == 0) { revert ERC1967InvalidImplementation(beaconImplementation); } } /** * @dev Change the beacon and trigger a setup call if data is nonempty. * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected * to avoid stuck value in the contract. * * Emits an {IERC1967-BeaconUpgraded} event. * * CAUTION: Invoking this function has no effect on an instance of {BeaconProxy} since v5, since * it uses an immutable beacon without looking at the value of the ERC-1967 beacon slot for * efficiency. */ function upgradeBeaconToAndCall(address newBeacon, bytes memory data) internal { _setBeacon(newBeacon); emit BeaconUpgraded(newBeacon); if (data.length > 0) { Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data); } else { _checkNonPayable(); } } /** * @dev Reverts if `msg.value` is not zero. It can be used to avoid `msg.value` stuck in the contract * if an upgrade doesn't perform an initialization call. */ function _checkNonPayable() private { if (msg.value > 0) { revert ERC1967NonPayable(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (proxy/Proxy.sol) pragma solidity ^0.8.20; /** * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to * be specified by overriding the virtual {_implementation} function. * * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a * different contract through the {_delegate} function. * * The success and return data of the delegated call will be returned back to the caller of the proxy. */ abstract contract Proxy { /** * @dev Delegates the current call to `implementation`. * * This function does not return to its internal call site, it will return directly to the external caller. */ function _delegate(address implementation) internal virtual { assembly { // Copy msg.data. We take full control of memory in this inline assembly // block because it will not return to Solidity code. We overwrite the // Solidity scratch pad at memory position 0. calldatacopy(0, 0, calldatasize()) // Call the implementation. // out and outsize are 0 because we don't know the size yet. let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0) // Copy the returned data. returndatacopy(0, 0, returndatasize()) switch result // delegatecall returns 0 on error. case 0 { revert(0, returndatasize()) } default { return(0, returndatasize()) } } } /** * @dev This is a virtual function that should be overridden so it returns the address to which the fallback * function and {_fallback} should delegate. */ function _implementation() internal view virtual returns (address); /** * @dev Delegates the current call to the address returned by `_implementation()`. * * This function does not return to its internal call site, it will return directly to the external caller. */ function _fallback() internal virtual { _delegate(_implementation()); } /** * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other * function in the contract matches the call data. */ fallback() external payable virtual { _fallback(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "./IERC20.sol"; import {IERC20Metadata} from "./extensions/IERC20Metadata.sol"; import {Context} from "../../utils/Context.sol"; import {IERC20Errors} from "../../interfaces/draft-IERC6093.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 ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors { mapping(address account => uint256) private _balances; mapping(address account => mapping(address spender => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { 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) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual returns (uint256) { 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) { 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 { 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 { 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/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 v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// 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/StorageSlot.sol) // This file was procedurally generated from scripts/generate/templates/StorageSlot.js. pragma solidity ^0.8.20; /** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ```solidity * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(newImplementation.code.length > 0); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` */ library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } struct StringSlot { string value; } struct BytesSlot { bytes value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` with member `value` located at `slot`. */ function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` representation of the string storage pointer `store`. */ function getStringSlot(string storage store) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } /** * @dev Returns an `BytesSlot` with member `value` located at `slot`. */ function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`. */ function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/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 pragma solidity ^0.8.20; contract Constants { // 0x00: ethereum // 0x01: arbitrum // 0x02: bnb smart chain // 0x03: polygon // 0x04: optimism // 0x05: avalanche // 0x06: base // 0x07: linea // 0x08: zksync // 0x09: scroll // 0x0a: mode // 0x0b: manta // 0x0c: zklink // 0x0d: core // 0x0e: xlayer // 0x0f: mantle // 0x10: merlin // 0x11: b2 // 0x12: bitlayer // 0x13: bevm // 0x14: bb // 0x15: bob // 0x16: opbnb // 0x1a: neox // 0x20: kava // 0x21: kroma // 0x22: kaia // 0x23: ailayer // 0x24: zircuit // 0x25: iotex // 0x26: zeta // 0x27: taiko // 0x28: sei // 0x29: duck // 0x2a: morph // 0xa0: (non-evm) sui // 0xf0: sepolia // 0xf1: merlin-testnet // 0xf2: b2-testnet uint8 constant CHAIN = 0x00; // This value should be different for different bridge deployments string constant BRIDGE_CHANNEL = "NeoX Bridge"; uint256 constant PROPOSE_PERIOD = 48 hours; uint256 constant EXPIRE_PERIOD = 72 hours; uint256 constant EXPIRE_EXTRA_PERIOD = 96 hours; bytes26 constant ETH_SIGN_HEADER = bytes26("\x19Ethereum Signed Message:\n"); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol"; abstract contract ERC1967 is ERC1967Proxy {}
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "./MintableERC20.sol"; import "../Permissions.sol"; import "../ReqHelpers.sol"; contract AtomicMintContract is Permissions, ReqHelpers, UUPSUpgradeable { using SafeERC20 for MintableERC20; mapping(bytes32 => address) public proposedMint; mapping(bytes32 => address) public proposedBurn; function initialize(address _admin, address _vault, address proposer, address[] calldata executors, uint256 threshold) public initializer { _initAdmin(_admin); if (_vault != address(0)) { _initVault(_vault); } _addProposer(proposer); _initExecutors(executors, threshold); } function _authorizeUpgrade(address newImplementation) internal override onlyAdmin {} function addToken(uint8 tokenIndex, address tokenAddr) external onlyAdmin { _addToken(tokenIndex, tokenAddr); } function createToken(uint8 tokenIndex, string memory name, string memory symbol, uint8 decimals) external onlyAdmin { MintableERC20 tokenAddr = new MintableERC20(address(this), _getVaultWithAdminFallback(), name, symbol, decimals); _addToken(tokenIndex, address(tokenAddr)); } function removeToken(uint8 tokenIndex) external onlyAdmin { _removeToken(tokenIndex); } event TokenMintProposed(bytes32 indexed reqId, address indexed recipient); event TokenMintExecuted(bytes32 indexed reqId, address indexed recipient); event TokenMintCancelled(bytes32 indexed reqId, address indexed recipient); function proposeMint(bytes32 reqId, address recipient) external onlyProposer toChainOnly(reqId) { require(_actionFrom(reqId) & 0x0f == 1, "Invalid action; not lock-mint"); _proposeMint(reqId, recipient); } function proposeMintFromBurn(bytes32 reqId, address recipient) external onlyProposer toChainOnly(reqId) { require(_actionFrom(reqId) & 0x0f == 3, "Invalid action; not burn-mint"); _proposeMint(reqId, recipient); } function _proposeMint(bytes32 reqId, address recipient) private { _createdTimeFrom(reqId, true); require(proposedMint[reqId] == address(0), "Invalid reqId"); require(recipient > address(1), "Invalid recipient"); _amountFrom(reqId); _tokenFrom(reqId); proposedMint[reqId] = recipient; emit TokenMintProposed(reqId, recipient); } function executeMint(bytes32 reqId, bytes32[] memory r, bytes32[] memory yParityAndS, address[] memory executors, uint256 exeIndex) external { address recipient = proposedMint[reqId]; require(recipient > address(1), "Invalid reqId"); bytes32 digest = _digestFromReqSigningMessage(reqId); _checkMultiSignatures(digest, r, yParityAndS, executors, exeIndex); proposedMint[reqId] = address(1); uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); address vault; if (_actionFrom(reqId) & 0x10 > 0) { vault = getVault(); } if (vault == address(0)) { MintableERC20(tokenAddr).mint(recipient, amount); } else { MintableERC20(tokenAddr).mint(vault, amount); } emit TokenMintExecuted(reqId, recipient); } function cancelMint(bytes32 reqId) external { address recipient = proposedMint[reqId]; require(recipient > address(1), "Invalid reqId"); require(block.timestamp > _createdTimeFrom(reqId, false) + EXPIRE_EXTRA_PERIOD, "Wait until expired to cancel"); delete proposedMint[reqId]; emit TokenMintCancelled(reqId, recipient); } event TokenBurnProposed(bytes32 indexed reqId, address indexed proposer); event TokenBurnExecuted(bytes32 indexed reqId, address indexed proposer); event TokenBurnCancelled(bytes32 indexed reqId, address indexed proposer); function proposeBurn(bytes32 reqId) payable external toChainOnly(reqId) { require(_actionFrom(reqId) & 0x0f == 2, "Invalid action; not burn-unlock"); _proposeBurn(reqId); } function proposeBurnForMint(bytes32 reqId) payable external fromChainOnly(reqId) { require(_actionFrom(reqId) & 0x0f == 3, "Invalid action; not burn-mint"); _proposeBurn(reqId); } function _proposeBurn(bytes32 reqId) private { _createdTimeFrom(reqId, true); require(proposedBurn[reqId] == address(0), "Invalid reqId"); address proposer = msg.sender; require(proposer > address(1), "Invalid proposer"); uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); proposedBurn[reqId] = proposer; MintableERC20(tokenAddr).safeTransferFrom(proposer, address(this), amount); emit TokenBurnProposed(reqId, proposer); } function executeBurn(bytes32 reqId, bytes32[] memory r, bytes32[] memory yParityAndS, address[] memory executors, uint256 exeIndex) external { address proposer = proposedBurn[reqId]; require(proposer > address(1), "Invalid reqId"); bytes32 digest = _digestFromReqSigningMessage(reqId); _checkMultiSignatures(digest, r, yParityAndS, executors, exeIndex); proposedBurn[reqId] = address(1); uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); MintableERC20(tokenAddr).burn(address(this), amount); emit TokenBurnExecuted(reqId, proposer); } function cancelBurn(bytes32 reqId) external { address proposer = proposedBurn[reqId]; require(proposer > address(1), "Invalid reqId"); require(block.timestamp > _createdTimeFrom(reqId, false) + EXPIRE_PERIOD, "Wait until expired to cancel"); delete proposedBurn[reqId]; uint256 amount = _amountFrom(reqId); address tokenAddr = _tokenFrom(reqId); MintableERC20(tokenAddr).safeTransfer(proposer, amount); emit TokenBurnCancelled(reqId, proposer); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; contract MintableERC20 is ERC20 { uint8 immutable private _decimals; address public minter; address public vault; uint256 public mintQuota; constructor(address minter_, address vault_, string memory name, string memory symbol, uint8 decimals_) ERC20(name, symbol) { minter = minter_; vault = vault_; _decimals = decimals_; } function decimals() public view override returns (uint8) { return _decimals; } modifier onlyMinter() { require(msg.sender == minter, "Require minter"); _; } modifier onlyVault() { require(msg.sender == vault, "Require vault"); _; } event MinterTransferred(address indexed prevMinter, address indexed newMinter); function transferMinter(address newMinter) external onlyMinter { address prevMinter = minter; minter = newMinter; emit MinterTransferred(prevMinter, newMinter); } event VaultTransferred(address indexed prevVault, address indexed newVault); function transferVault(address newVault) external onlyVault { address prevVault = vault; vault = newVault; emit VaultTransferred(prevVault, newVault); } function updateMintQuota(uint256 delta) external onlyVault { mintQuota += delta; } function mint(address account, uint256 amount) external onlyMinter { if (account != vault) { mintQuota -= amount; } _mint(account, amount); } function burn(address account, uint256 amount) external onlyMinter { _burn(account, amount); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/utils/math/Math.sol"; import "./Constants.sol"; contract Permissions is Constants { struct PermissionsStorage { address _admin; address _vault; mapping(address => uint256) _proposerIndex; address[] _proposerList; address[][] _executorsForIndex; uint256[] _exeThresholdForIndex; uint256[] _exeActiveSinceForIndex; } // keccak256(abi.encode(uint256(keccak256("atomic-lock-mint.Permissions")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant PermissionsLocation = 0xd1028ee8b04e383c5a05bb344e0e3bf65a78ced42fbbac56a26c8b6f5a4f7100; function _getPermissionsStorage() private pure returns (PermissionsStorage storage $) { assembly { $.slot := PermissionsLocation } } modifier onlyAdmin() { require(msg.sender == getAdmin(), "Require admin"); _; } modifier onlyVaultWithAdminFallback() { require(msg.sender == _getVaultWithAdminFallback(), "Require vault"); _; } modifier onlyProposer() { PermissionsStorage storage $ = _getPermissionsStorage(); require($._proposerIndex[msg.sender] > 0, "Require a proposer"); _; } function getAdmin() public view returns (address) { PermissionsStorage storage $ = _getPermissionsStorage(); return $._admin; } event AdminTransferred(address indexed prevAdmin, address indexed newAdmin); function _initAdmin(address admin) internal { PermissionsStorage storage $ = _getPermissionsStorage(); $._admin = admin; emit AdminTransferred(address(0), admin); } function transferAdmin(address newAdmin) external onlyAdmin { PermissionsStorage storage $ = _getPermissionsStorage(); address prevAdmin = $._admin; $._admin = newAdmin; emit AdminTransferred(prevAdmin, newAdmin); } function getVault() public view returns (address) { PermissionsStorage storage $ = _getPermissionsStorage(); return $._vault; } function _getVaultWithAdminFallback() internal view returns (address) { PermissionsStorage storage $ = _getPermissionsStorage(); address vault = $._vault; return vault == address(0) ? $._admin : vault; } event VaultTransferred(address indexed prevVault, address indexed newVault); function _initVault(address vault) internal { PermissionsStorage storage $ = _getPermissionsStorage(); $._vault = vault; emit VaultTransferred(address(0), vault); } function transferVault(address newVault) external onlyVaultWithAdminFallback { PermissionsStorage storage $ = _getPermissionsStorage(); address prevVault = $._vault; $._vault = newVault; emit VaultTransferred(prevVault, newVault); } function proposerIndex(address proposer) external view returns (uint256) { PermissionsStorage storage $ = _getPermissionsStorage(); return $._proposerIndex[proposer]; } function proposerOfIndex(uint256 index) external view returns (address) { PermissionsStorage storage $ = _getPermissionsStorage(); return $._proposerList[index]; } event ProposerAdded(address indexed proposer); event ProposerRemoved(address indexed proposer); function addProposer(address proposer) external onlyAdmin { _addProposer(proposer); } function _addProposer(address proposer) internal { PermissionsStorage storage $ = _getPermissionsStorage(); require($._proposerIndex[proposer] == 0, "Already a proposer"); $._proposerList.push(proposer); $._proposerIndex[proposer] = $._proposerList.length; emit ProposerAdded(proposer); } function removeProposer(address proposer) external onlyAdmin { PermissionsStorage storage $ = _getPermissionsStorage(); uint256 index = $._proposerIndex[proposer]; require(index > 0, "Not an existing proposer"); delete $._proposerIndex[proposer]; uint256 len = $._proposerList.length; if (index < len) { address lastProposer = $._proposerList[len - 1]; $._proposerList[index - 1] = lastProposer; $._proposerIndex[lastProposer] = index; } $._proposerList.pop(); emit ProposerRemoved(proposer); } function executorsForIndex(uint256 index) external view returns (address[] memory) { PermissionsStorage storage $ = _getPermissionsStorage(); return $._executorsForIndex[index]; } function exeThresholdForIndex(uint256 index) external view returns (uint256) { PermissionsStorage storage $ = _getPermissionsStorage(); return $._exeThresholdForIndex[index]; } function exeActiveSinceForIndex(uint256 index) external view returns (uint256) { PermissionsStorage storage $ = _getPermissionsStorage(); return $._exeActiveSinceForIndex[index]; } function getActiveExecutors() external view returns (address[] memory executors, uint256 threshold, uint256 activeSince, uint256 exeIndex) { PermissionsStorage storage $ = _getPermissionsStorage(); exeIndex = $._exeActiveSinceForIndex.length - 1; if ($._exeActiveSinceForIndex[exeIndex] > block.timestamp) { exeIndex--; } executors = $._executorsForIndex[exeIndex]; threshold = $._exeThresholdForIndex[exeIndex]; activeSince = $._exeActiveSinceForIndex[exeIndex]; } function _initExecutors(address[] memory executors, uint256 threshold) internal { PermissionsStorage storage $ = _getPermissionsStorage(); require($._exeThresholdForIndex.length == 0, "Executors already initialized"); require(threshold > 0, "Threshold must be greater than 0"); $._executorsForIndex.push(executors); $._exeThresholdForIndex.push(threshold); $._exeActiveSinceForIndex.push(1); } // All history executors will be recorded and indexed in chronological order. // When a new set of `executors` is updated, the index will increase by 1. // When updating `executors`, an `activeSince` timestamp must be provided, // indicating the time from which this set of `executors` will become effective. // The `activeSince` must be between 1.5 and 5 days after the current time, and also // at least 1 day after the `activeSince` of the previous set of `executors`. // Note that when the new set of `executors` becomes effective, the previous // set of `executors` will become invalid. function updateExecutors( address[] calldata newExecutors, uint256 threshold, uint256 activeSince, bytes32[] calldata r, bytes32[] calldata yParityAndS, address[] calldata executors, uint256 exeIndex ) external { require(threshold > 0, "Threshold must be greater than 0"); require(activeSince > block.timestamp + 36 hours, "The activeSince should be after 1.5 days from now"); require(activeSince < block.timestamp + 5 days, "The activeSince should be within 5 days from now"); bytes32 digest = keccak256(abi.encodePacked( ETH_SIGN_HEADER, Strings.toString(3 + bytes(BRIDGE_CHANNEL).length + (29 + 43 * newExecutors.length) + (12 + Math.log10(threshold) + 1) + (15 + 10) + (25 + Math.log10(exeIndex) + 1)), "[", BRIDGE_CHANNEL, "]\n", "Sign to update executors to:\n", __joinAddressList(newExecutors), "Threshold: ", Strings.toString(threshold), "\n", "Active since: ", Strings.toString(activeSince), "\n", "Current executors index: ", Strings.toString(exeIndex) )); _checkMultiSignatures(digest, r, yParityAndS, executors, exeIndex); PermissionsStorage storage $ = _getPermissionsStorage(); uint256 newIndex = exeIndex + 1; if (newIndex == $._exeActiveSinceForIndex.length) { $._executorsForIndex.push(newExecutors); $._exeThresholdForIndex.push(threshold); $._exeActiveSinceForIndex.push(activeSince); } else { require(activeSince >= $._exeActiveSinceForIndex[newIndex], "Failed to overwrite existing executors"); require(threshold >= $._exeThresholdForIndex[newIndex], "Failed to overwrite existing executors"); require(__cmpAddrList(newExecutors, $._executorsForIndex[newIndex]), "Failed to overwrite existing executors"); $._executorsForIndex[newIndex] = newExecutors; $._exeThresholdForIndex[newIndex] = threshold; $._exeActiveSinceForIndex[newIndex] = activeSince; } } function __joinAddressList(address[] memory addrs) private pure returns (string memory) { string memory result = ""; for (uint256 i = 0; i < addrs.length; i++) { string memory addrStr = Strings.toHexString(addrs[i]); if (i == 0) { result = string(abi.encodePacked(addrStr, "\n")); } else { result = string(abi.encodePacked(result, addrStr, "\n")); } } return result; } function __cmpAddrList(address[] memory list1, address[] memory list2) private pure returns (bool) { if (list1.length > list2.length) { return true; } else if (list1.length < list2.length) { return false; } for (uint256 i = 0; i < list1.length; i++) { if (list1[i] > list2[i]) { return true; } else if (list1[i] < list2[i]) { return false; } } return false; } function _checkMultiSignatures( bytes32 digest, bytes32[] memory r, bytes32[] memory yParityAndS, address[] memory executors, uint256 exeIndex ) internal view { require(r.length == yParityAndS.length, "Array length should equal"); require(r.length == executors.length, "Array length should equal"); __checkExecutorsForIndex(executors, exeIndex); for (uint256 i = 0; i < executors.length; i++) { address executor = executors[i]; __checkSignature(digest, r[i], yParityAndS[i], executor); } } function __checkExecutorsForIndex(address[] memory executors, uint256 exeIndex) private view { PermissionsStorage storage $ = _getPermissionsStorage(); require(executors.length >= $._exeThresholdForIndex[exeIndex], "Does not meet threshold"); uint256 blockTime = block.timestamp; uint256 activeSince = $._exeActiveSinceForIndex[exeIndex]; require(activeSince < blockTime, "Executors not yet active"); if ($._exeActiveSinceForIndex.length > exeIndex + 1) { uint256 nextActiveSince = $._exeActiveSinceForIndex[exeIndex + 1]; require(nextActiveSince > blockTime, "Executors of next index is active"); } address[] memory currentExecutors = $._executorsForIndex[exeIndex]; for (uint256 i = 0; i < executors.length; i++) { address executor = executors[i]; for (uint256 j = 0; j < i; j++) { require(executors[j] != executor, "Duplicated executors"); } bool isExecutor = false; for (uint256 j = 0; j < currentExecutors.length; j++) { if (executor == currentExecutors[j]) { isExecutor = true; break; } } require(isExecutor, "Non-executor"); } } function __checkSignature(bytes32 digest, bytes32 r, bytes32 yParityAndS, address signer) internal pure { require(signer != address(0), "Signer cannot be empty address"); bytes32 s = yParityAndS & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(yParityAndS) >> 255) + 27); require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "Invalid signature"); require(signer == ecrecover(digest, v, r, s), "Invalid signature"); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "./Constants.sol"; contract ReqHelpers is Constants { struct ReqHelpersStorage { mapping(uint8 => address) _tokens; mapping(uint8 => uint8) _tokenDecimals; } // keccak256(abi.encode(uint256(keccak256("atomic-lock-mint.ReqHelpers")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ReqHelpersStorageLocation = 0xd6c54e2ae807cd214b40b716718abbdcf0be862340bc50cb8180c058254f4b00; function _getReqHelpersStorage() private pure returns (ReqHelpersStorage storage $) { assembly { $.slot := ReqHelpersStorageLocation } } function tokenForIndex(uint8 tokenIndex) external view returns (address) { ReqHelpersStorage storage $ = _getReqHelpersStorage(); return $._tokens[tokenIndex]; } event TokenAdded(uint8 tokenIndex, address tokenAddr); event TokenRemoved(uint8 tokenIndex, address tokenAddr); function _addToken(uint8 tokenIndex, address tokenAddr) internal { ReqHelpersStorage storage $ = _getReqHelpersStorage(); require($._tokens[tokenIndex] == address(0), "Token index occupied"); require(tokenIndex > 0, "Token index cannot be zero"); require(tokenAddr != address(0), "Token address cannot be zero"); uint8 decimals = tokenAddr == address(1) ? 18 : IERC20Metadata(tokenAddr).decimals(); if (decimals == 6) { require(tokenIndex < 64, "Token with decimals 6 should have index 1-63"); } else if (decimals == 18) { require(tokenIndex >= 64 && tokenIndex < 192, "Token with decimals 18 should have index 64-191"); } else { require(tokenIndex >= 192, "Token with decimals other than 6 or 18 should have index 192-255"); $._tokenDecimals[tokenIndex] = decimals; } $._tokens[tokenIndex] = tokenAddr; emit TokenAdded(tokenIndex, tokenAddr); } function _removeToken(uint8 tokenIndex) internal { require(tokenIndex > 0, "Token index cannot be zero"); ReqHelpersStorage storage $ = _getReqHelpersStorage(); address tokenAddr = $._tokens[tokenIndex]; require(tokenAddr != address(0), "No token for this tokenIndex"); delete $._tokens[tokenIndex]; if (tokenIndex >= 192) { delete $._tokenDecimals[tokenIndex]; } emit TokenRemoved(tokenIndex, tokenAddr); } function getSupportedTokens() external view returns (address[] memory supportedTokens, uint8[] memory indexes, uint8[] memory decimals) { ReqHelpersStorage storage $ = _getReqHelpersStorage(); uint8 i; uint8 num = 0; for (i = 0; i < 255; i++) { if ($._tokens[i+1] != address(0)) { num++; } } supportedTokens = new address[](num); indexes = new uint8[](num); decimals = new uint8[](num); uint8 j = 0; for (i = 0; i < 255; i++) { if ($._tokens[i+1] != address(0)) { supportedTokens[j] = $._tokens[i+1]; indexes[j] = i+1; if (i+1 < 64) { decimals[j] = 6; } else if (i+1 < 192) { decimals[j] = 18; } else { decimals[j] = $._tokenDecimals[i+1]; } j++; } } } /// `reqId` in format of `version:uint8|createdTime:uint40|action:uint8|tokenIndex:uint8|amount:uint64|from:uint8|to:uint8|(TBD):uint112` function _versionFrom(bytes32 reqId) internal pure returns (uint8) { return uint8(uint256(reqId) >> 248); } function _createdTimeFrom(bytes32 reqId, bool check) internal view returns (uint256 createdTime) { createdTime = uint40(uint256(reqId) >> 208); if (check) { require(createdTime > block.timestamp - PROPOSE_PERIOD, "createdTime too early"); require(createdTime < block.timestamp + 1 minutes, "createdTime too late"); } } // action: // 0x01: lock-mint // 0x02: burn-unlock // 0x03: burn-mint // 0x11: lock-mint (lock & mint to vault) // 0x12: burn-unlock (unlock from vault) // 0x13: burn-mint (mint to vault) function _actionFrom(bytes32 reqId) internal pure returns (uint8 action) { action = uint8(uint256(reqId) >> 200); } function _tokenFrom(bytes32 reqId) internal view returns (address tokenAddr) { ReqHelpersStorage storage $ = _getReqHelpersStorage(); uint8 tokenIndex = uint8(uint256(reqId) >> 192); tokenAddr = $._tokens[tokenIndex]; require(tokenAddr != address(0), "Invalid tokenIndex"); } function _amountFrom(bytes32 reqId) internal view returns (uint256 amount) { amount = (uint256(reqId) >> 128) & 0xFFFFFFFFFFFFFFFF; require(amount > 0, "Amount must be greater than zero"); uint8 tokenIndex = uint8(uint256(reqId) >> 192); if (tokenIndex >= 192) { ReqHelpersStorage storage $ = _getReqHelpersStorage(); uint8 decimals = $._tokenDecimals[tokenIndex]; if (decimals > 6) { amount *= 10 ** (decimals - 6); } else { amount /= 10 ** (6 - decimals); } } else if (tokenIndex >= 64) { amount *= 1e12; } } function _digestFromReqSigningMessage(bytes32 reqId) internal pure returns (bytes32) { uint8 specificAction = _actionFrom(reqId) & 0x0f; if (specificAction == 1) { return keccak256(abi.encodePacked( ETH_SIGN_HEADER, Strings.toString(3 + bytes(BRIDGE_CHANNEL).length + 29 + 66), "[", BRIDGE_CHANNEL, "]\n", "Sign to execute a lock-mint:\n", Strings.toHexString(uint256(reqId), 32) )); } else if (specificAction == 2) { return keccak256(abi.encodePacked( ETH_SIGN_HEADER, Strings.toString(3 + bytes(BRIDGE_CHANNEL).length + 31 + 66), "[", BRIDGE_CHANNEL, "]\n", "Sign to execute a burn-unlock:\n", Strings.toHexString(uint256(reqId), 32) )); } else if (specificAction == 3) { return keccak256(abi.encodePacked( ETH_SIGN_HEADER, Strings.toString(3 + bytes(BRIDGE_CHANNEL).length + 29 + 66), "[", BRIDGE_CHANNEL, "]\n", "Sign to execute a burn-mint:\n", Strings.toHexString(uint256(reqId), 32) )); } return 0x0; } modifier fromChainOnly(bytes32 reqId) { require(CHAIN == uint8(uint256(reqId) >> 120), "Request not from the current chain"); _; } modifier toChainOnly(bytes32 reqId) { require(CHAIN == uint8(uint256(reqId) >> 112), "Request not to the current chain"); _; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "paris", "viaIR": true, "metadata": { "bytecodeHash": "none" }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Swarm Source
none
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.