Forkchoice Ethereum Mainnet

Address Contract Partially Verified

Address 0x1643507bCEa7FF94aCaFCc6Ac1d47F0DF3D137FE
Balance 0 ETH
Nonce 1
Code Size 14540 bytes
Indexed Transactions 0 (1 on-chain, 1.5% indexed)
External Etherscan · Sourcify

Contract Bytecode

14540 bytes
Copy Bytecode
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Verified Source Code Partial Match

Compiler: v0.8.28+commit.7893614a EVM: cancun Optimization: Yes (200 runs)
Initializable.sol 228 lines
// 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
        }
    }
}
UUPSUpgradeable.sol 153 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.22;

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 ERC-1967) 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 ERC-1167 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 ERC-1822 {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 ERC-1967 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 ERC-1967.
     *
     * 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);
        }
    }
}
ContextUpgradeable.sol 34 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
PausableUpgradeable.sol 140 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Pausable
    struct PausableStorage {
        bool _paused;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Pausable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant PausableStorageLocation = 0xcd5ed15c6e187e77e9aee88184c21f4f2182ab5827cb3b7e07fbedcd63f03300;

    function _getPausableStorage() private pure returns (PausableStorage storage $) {
        assembly {
            $.slot := PausableStorageLocation
        }
    }

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        PausableStorage storage $ = _getPausableStorage();
        return $._paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = false;
        emit Unpaused(_msgSender());
    }
}
ReentrancyGuardTransientUpgradeable.sol 67 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuardTransient.sol)

pragma solidity ^0.8.24;

import {TransientSlot} from "@openzeppelin/contracts/utils/TransientSlot.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Variant of {ReentrancyGuard} that uses transient storage.
 *
 * NOTE: This variant only works on networks where EIP-1153 is available.
 *
 * _Available since v5.1._
 */
abstract contract ReentrancyGuardTransientUpgradeable is Initializable {
    using TransientSlot for *;

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant REENTRANCY_GUARD_STORAGE =
        0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function __ReentrancyGuardTransient_init() internal onlyInitializing {
    }

    function __ReentrancyGuardTransient_init_unchained() internal onlyInitializing {
    }
    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_reentrancyGuardEntered()) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        REENTRANCY_GUARD_STORAGE.asBoolean().tstore(true);
    }

    function _nonReentrantAfter() private {
        REENTRANCY_GUARD_STORAGE.asBoolean().tstore(false);
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return REENTRANCY_GUARD_STORAGE.asBoolean().tload();
    }
}
Ownable.sol 100 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
IERC1363.sol 86 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/IERC1363.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}
IERC165.sol 6 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";
IERC1967.sol 24 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1967.sol)

pragma solidity ^0.8.20;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 */
interface IERC1967 {
    /**
     * @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);
}
IERC20.sol 6 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";
draft-IERC1822.sol 20 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.20;

/**
 * @dev ERC-1822: 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);
}
ERC1967Utils.sol 177 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (proxy/ERC1967/ERC1967Utils.sol)

pragma solidity ^0.8.22;

import {IBeacon} from "../beacon/IBeacon.sol";
import {IERC1967} from "../../interfaces/IERC1967.sol";
import {Address} from "../../utils/Address.sol";
import {StorageSlot} from "../../utils/StorageSlot.sol";

/**
 * @dev This library provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967] slots.
 */
library ERC1967Utils {
    /**
     * @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 ERC-1967 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 IERC1967.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 ERC-1967) 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 ERC-1967 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 IERC1967.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 ERC-1967 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 IERC1967.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();
        }
    }
}
Proxy.sol 69 lines
// 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();
    }
}
BeaconProxy.sol 57 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (proxy/beacon/BeaconProxy.sol)

pragma solidity ^0.8.22;

import {IBeacon} from "./IBeacon.sol";
import {Proxy} from "../Proxy.sol";
import {ERC1967Utils} from "../ERC1967/ERC1967Utils.sol";

/**
 * @dev This contract implements a proxy that gets the implementation address for each call from an {UpgradeableBeacon}.
 *
 * The beacon address can only be set once during construction, and cannot be changed afterwards. It is stored in an
 * immutable variable to avoid unnecessary storage reads, and also in the beacon storage slot specified by
 * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967] so that it can be accessed externally.
 *
 * CAUTION: Since the beacon address can never be changed, you must ensure that you either control the beacon, or trust
 * the beacon to not upgrade the implementation maliciously.
 *
 * IMPORTANT: Do not use the implementation logic to modify the beacon storage slot. Doing so would leave the proxy in
 * an inconsistent state where the beacon storage slot does not match the beacon address.
 */
contract BeaconProxy is Proxy {
    // An immutable address for the beacon to avoid unnecessary SLOADs before each delegate call.
    address private immutable _beacon;

    /**
     * @dev Initializes the proxy with `beacon`.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This
     * will typically be an encoded function call, and allows initializing the storage of the proxy like a Solidity
     * constructor.
     *
     * Requirements:
     *
     * - `beacon` must be a contract with the interface {IBeacon}.
     * - If `data` is empty, `msg.value` must be zero.
     */
    constructor(address beacon, bytes memory data) payable {
        ERC1967Utils.upgradeBeaconToAndCall(beacon, data);
        _beacon = beacon;
    }

    /**
     * @dev Returns the current implementation address of the associated beacon.
     */
    function _implementation() internal view virtual override returns (address) {
        return IBeacon(_getBeacon()).implementation();
    }

    /**
     * @dev Returns the beacon.
     */
    function _getBeacon() internal view virtual returns (address) {
        return _beacon;
    }
}
IBeacon.sol 16 lines
// 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);
}
UpgradeableBeacon.sol 70 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/beacon/UpgradeableBeacon.sol)

pragma solidity ^0.8.20;

import {IBeacon} from "./IBeacon.sol";
import {Ownable} from "../../access/Ownable.sol";

/**
 * @dev This contract is used in conjunction with one or more instances of {BeaconProxy} to determine their
 * implementation contract, which is where they will delegate all function calls.
 *
 * An owner is able to change the implementation the beacon points to, thus upgrading the proxies that use this beacon.
 */
contract UpgradeableBeacon is IBeacon, Ownable {
    address private _implementation;

    /**
     * @dev The `implementation` of the beacon is invalid.
     */
    error BeaconInvalidImplementation(address implementation);

    /**
     * @dev Emitted when the implementation returned by the beacon is changed.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Sets the address of the initial implementation, and the initial owner who can upgrade the beacon.
     */
    constructor(address implementation_, address initialOwner) Ownable(initialOwner) {
        _setImplementation(implementation_);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function implementation() public view virtual returns (address) {
        return _implementation;
    }

    /**
     * @dev Upgrades the beacon to a new implementation.
     *
     * Emits an {Upgraded} event.
     *
     * Requirements:
     *
     * - msg.sender must be the owner of the contract.
     * - `newImplementation` must be a contract.
     */
    function upgradeTo(address newImplementation) public virtual onlyOwner {
        _setImplementation(newImplementation);
    }

    /**
     * @dev Sets the implementation contract address for this beacon
     *
     * Requirements:
     *
     * - `newImplementation` must be a contract.
     */
    function _setImplementation(address newImplementation) private {
        if (newImplementation.code.length == 0) {
            revert BeaconInvalidImplementation(newImplementation);
        }
        _implementation = newImplementation;
        emit Upgraded(newImplementation);
    }
}
IERC20.sol 79 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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);
}
SafeERC20.sol 198 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 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 {
    /**
     * @dev An operation with an ERC-20 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.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    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.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    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.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    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 Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            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 {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            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 silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}
Address.sol 150 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (utils/Address.sol)

pragma solidity ^0.8.20;

import {Errors} from "./Errors.sol";

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @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 Errors.InsufficientBalance(address(this).balance, amount);
        }

        (bool success, bytes memory returndata) = recipient.call{value: amount}("");
        if (!success) {
            _revert(returndata);
        }
    }

    /**
     * @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
     * {Errors.FailedCall} 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 Errors.InsufficientBalance(address(this).balance, value);
        }
        (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 {Errors.FailedCall}) 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 {Errors.FailedCall} 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 {Errors.FailedCall}.
     */
    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
            assembly ("memory-safe") {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert Errors.FailedCall();
        }
    }
}
Context.sol 28 lines
// 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;
    }
}
Errors.sol 34 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Errors.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of common custom errors used in multiple contracts
 *
 * IMPORTANT: Backwards compatibility is not guaranteed in future versions of the library.
 * It is recommended to avoid relying on the error API for critical functionality.
 *
 * _Available since v5.1._
 */
library Errors {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error InsufficientBalance(uint256 balance, uint256 needed);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedCall();

    /**
     * @dev The deployment failed.
     */
    error FailedDeployment();

    /**
     * @dev A necessary precompile is missing.
     */
    error MissingPrecompile(address);
}
Panic.sol 57 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Panic.sol)

pragma solidity ^0.8.20;

/**
 * @dev Helper library for emitting standardized panic codes.
 *
 * ```solidity
 * contract Example {
 *      using Panic for uint256;
 *
 *      // Use any of the declared internal constants
 *      function foo() { Panic.GENERIC.panic(); }
 *
 *      // Alternatively
 *      function foo() { Panic.panic(Panic.GENERIC); }
 * }
 * ```
 *
 * Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil].
 *
 * _Available since v5.1._
 */
// slither-disable-next-line unused-state
library Panic {
    /// @dev generic / unspecified error
    uint256 internal constant GENERIC = 0x00;
    /// @dev used by the assert() builtin
    uint256 internal constant ASSERT = 0x01;
    /// @dev arithmetic underflow or overflow
    uint256 internal constant UNDER_OVERFLOW = 0x11;
    /// @dev division or modulo by zero
    uint256 internal constant DIVISION_BY_ZERO = 0x12;
    /// @dev enum conversion error
    uint256 internal constant ENUM_CONVERSION_ERROR = 0x21;
    /// @dev invalid encoding in storage
    uint256 internal constant STORAGE_ENCODING_ERROR = 0x22;
    /// @dev empty array pop
    uint256 internal constant EMPTY_ARRAY_POP = 0x31;
    /// @dev array out of bounds access
    uint256 internal constant ARRAY_OUT_OF_BOUNDS = 0x32;
    /// @dev resource error (too large allocation or too large array)
    uint256 internal constant RESOURCE_ERROR = 0x41;
    /// @dev calling invalid internal function
    uint256 internal constant INVALID_INTERNAL_FUNCTION = 0x51;

    /// @dev Reverts with a panic code. Recommended to use with
    /// the internal constants with predefined codes.
    function panic(uint256 code) internal pure {
        assembly ("memory-safe") {
            mstore(0x00, 0x4e487b71)
            mstore(0x20, code)
            revert(0x1c, 0x24)
        }
    }
}
StorageSlot.sol 143 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (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 ERC-1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     // Define the slot. Alternatively, use the SlotDerivation library to derive the slot.
 *     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;
 *     }
 * }
 * ```
 *
 * TIP: Consider using this library along with {SlotDerivation}.
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct Int256Slot {
        int256 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) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Int256Slot` with member `value` located at `slot`.
     */
    function getInt256Slot(bytes32 slot) internal pure returns (Int256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            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) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns a `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            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) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }
}
TransientSlot.sol 183 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/TransientSlot.sol)
// This file was procedurally generated from scripts/generate/templates/TransientSlot.js.

pragma solidity ^0.8.24;

/**
 * @dev Library for reading and writing value-types to specific transient storage slots.
 *
 * Transient slots are often used to store temporary values that are removed after the current transaction.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 *  * Example reading and writing values using transient storage:
 * ```solidity
 * contract Lock {
 *     using TransientSlot for *;
 *
 *     // Define the slot. Alternatively, use the SlotDerivation library to derive the slot.
 *     bytes32 internal constant _LOCK_SLOT = 0xf4678858b2b588224636b8522b729e7722d32fc491da849ed75b3fdf3c84f542;
 *
 *     modifier locked() {
 *         require(!_LOCK_SLOT.asBoolean().tload());
 *
 *         _LOCK_SLOT.asBoolean().tstore(true);
 *         _;
 *         _LOCK_SLOT.asBoolean().tstore(false);
 *     }
 * }
 * ```
 *
 * TIP: Consider using this library along with {SlotDerivation}.
 */
library TransientSlot {
    /**
     * @dev UDVT that represent a slot holding a address.
     */
    type AddressSlot is bytes32;

    /**
     * @dev Cast an arbitrary slot to a AddressSlot.
     */
    function asAddress(bytes32 slot) internal pure returns (AddressSlot) {
        return AddressSlot.wrap(slot);
    }

    /**
     * @dev UDVT that represent a slot holding a bool.
     */
    type BooleanSlot is bytes32;

    /**
     * @dev Cast an arbitrary slot to a BooleanSlot.
     */
    function asBoolean(bytes32 slot) internal pure returns (BooleanSlot) {
        return BooleanSlot.wrap(slot);
    }

    /**
     * @dev UDVT that represent a slot holding a bytes32.
     */
    type Bytes32Slot is bytes32;

    /**
     * @dev Cast an arbitrary slot to a Bytes32Slot.
     */
    function asBytes32(bytes32 slot) internal pure returns (Bytes32Slot) {
        return Bytes32Slot.wrap(slot);
    }

    /**
     * @dev UDVT that represent a slot holding a uint256.
     */
    type Uint256Slot is bytes32;

    /**
     * @dev Cast an arbitrary slot to a Uint256Slot.
     */
    function asUint256(bytes32 slot) internal pure returns (Uint256Slot) {
        return Uint256Slot.wrap(slot);
    }

    /**
     * @dev UDVT that represent a slot holding a int256.
     */
    type Int256Slot is bytes32;

    /**
     * @dev Cast an arbitrary slot to a Int256Slot.
     */
    function asInt256(bytes32 slot) internal pure returns (Int256Slot) {
        return Int256Slot.wrap(slot);
    }

    /**
     * @dev Load the value held at location `slot` in transient storage.
     */
    function tload(AddressSlot slot) internal view returns (address value) {
        assembly ("memory-safe") {
            value := tload(slot)
        }
    }

    /**
     * @dev Store `value` at location `slot` in transient storage.
     */
    function tstore(AddressSlot slot, address value) internal {
        assembly ("memory-safe") {
            tstore(slot, value)
        }
    }

    /**
     * @dev Load the value held at location `slot` in transient storage.
     */
    function tload(BooleanSlot slot) internal view returns (bool value) {
        assembly ("memory-safe") {
            value := tload(slot)
        }
    }

    /**
     * @dev Store `value` at location `slot` in transient storage.
     */
    function tstore(BooleanSlot slot, bool value) internal {
        assembly ("memory-safe") {
            tstore(slot, value)
        }
    }

    /**
     * @dev Load the value held at location `slot` in transient storage.
     */
    function tload(Bytes32Slot slot) internal view returns (bytes32 value) {
        assembly ("memory-safe") {
            value := tload(slot)
        }
    }

    /**
     * @dev Store `value` at location `slot` in transient storage.
     */
    function tstore(Bytes32Slot slot, bytes32 value) internal {
        assembly ("memory-safe") {
            tstore(slot, value)
        }
    }

    /**
     * @dev Load the value held at location `slot` in transient storage.
     */
    function tload(Uint256Slot slot) internal view returns (uint256 value) {
        assembly ("memory-safe") {
            value := tload(slot)
        }
    }

    /**
     * @dev Store `value` at location `slot` in transient storage.
     */
    function tstore(Uint256Slot slot, uint256 value) internal {
        assembly ("memory-safe") {
            tstore(slot, value)
        }
    }

    /**
     * @dev Load the value held at location `slot` in transient storage.
     */
    function tload(Int256Slot slot) internal view returns (int256 value) {
        assembly ("memory-safe") {
            value := tload(slot)
        }
    }

    /**
     * @dev Store `value` at location `slot` in transient storage.
     */
    function tstore(Int256Slot slot, int256 value) internal {
        assembly ("memory-safe") {
            tstore(slot, value)
        }
    }
}
IERC165.sol 25 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
Math.sol 685 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

import {Panic} from "../Panic.sol";
import {SafeCast} from "./SafeCast.sol";

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    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 success flag (no overflow).
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an success flag (no overflow).
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an success flag (no overflow).
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        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 success flag (no division by zero).
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero).
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant.
     *
     * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone.
     * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute
     * one branch when needed, making this function more expensive.
     */
    function ternary(bool condition, uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            // branchless ternary works because:
            // b ^ (a ^ b) == a
            // b ^ 0 == b
            return b ^ ((a ^ b) * SafeCast.toUint(condition));
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(a > b, a, b);
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(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.
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }

        // The following calculation ensures accurate ceiling division without overflow.
        // Since a is non-zero, (a - 1) / b will not overflow.
        // The largest possible result occurs when (a - 1) / b is type(uint256).max,
        // but the largest value we can obtain is type(uint256).max - 1, which happens
        // when a = type(uint256).max and b = 1.
        unchecked {
            return SafeCast.toUint(a > 0) * ((a - 1) / b + 1);
        }
    }

    /**
     * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     *
     * 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 2²⁵⁶ and mod 2²⁵⁶ - 1, then use
            // the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2²⁵⁶ + 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 2²⁵⁶. Also prevents denominator == 0.
            if (denominator <= prod1) {
                Panic.panic(ternary(denominator == 0, Panic.DIVISION_BY_ZERO, Panic.UNDER_OVERFLOW));
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            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 2²⁵⁶ / 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 2²⁵⁶. Now that denominator is an odd number, it has an inverse modulo 2²⁵⁶ such
            // that denominator * inv ≡ 1 mod 2²⁵⁶. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv ≡ 1 mod 2⁴.
            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 2⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2¹⁶
            inverse *= 2 - denominator * inverse; // inverse mod 2³²
            inverse *= 2 - denominator * inverse; // inverse mod 2⁶⁴
            inverse *= 2 - denominator * inverse; // inverse mod 2¹²⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2²⁵⁶

            // 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 2²⁵⁶. Since the preconditions guarantee that the outcome is
            // less than 2²⁵⁶, 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;
        }
    }

    /**
     * @dev 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) {
        return mulDiv(x, y, denominator) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0);
    }

    /**
     * @dev Calculate the modular multiplicative inverse of a number in Z/nZ.
     *
     * If n is a prime, then Z/nZ is a field. In that case all elements are inversible, except 0.
     * If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible.
     *
     * If the input value is not inversible, 0 is returned.
     *
     * NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Fermat's little theorem and get the
     * inverse using `Math.modExp(a, n - 2, n)`. See {invModPrime}.
     */
    function invMod(uint256 a, uint256 n) internal pure returns (uint256) {
        unchecked {
            if (n == 0) return 0;

            // The inverse modulo is calculated using the Extended Euclidean Algorithm (iterative version)
            // Used to compute integers x and y such that: ax + ny = gcd(a, n).
            // When the gcd is 1, then the inverse of a modulo n exists and it's x.
            // ax + ny = 1
            // ax = 1 + (-y)n
            // ax ≡ 1 (mod n) # x is the inverse of a modulo n

            // If the remainder is 0 the gcd is n right away.
            uint256 remainder = a % n;
            uint256 gcd = n;

            // Therefore the initial coefficients are:
            // ax + ny = gcd(a, n) = n
            // 0a + 1n = n
            int256 x = 0;
            int256 y = 1;

            while (remainder != 0) {
                uint256 quotient = gcd / remainder;

                (gcd, remainder) = (
                    // The old remainder is the next gcd to try.
                    remainder,
                    // Compute the next remainder.
                    // Can't overflow given that (a % gcd) * (gcd // (a % gcd)) <= gcd
                    // where gcd is at most n (capped to type(uint256).max)
                    gcd - remainder * quotient
                );

                (x, y) = (
                    // Increment the coefficient of a.
                    y,
                    // Decrement the coefficient of n.
                    // Can overflow, but the result is casted to uint256 so that the
                    // next value of y is "wrapped around" to a value between 0 and n - 1.
                    x - y * int256(quotient)
                );
            }

            if (gcd != 1) return 0; // No inverse exists.
            return ternary(x < 0, n - uint256(-x), uint256(x)); // Wrap the result if it's negative.
        }
    }

    /**
     * @dev Variant of {invMod}. More efficient, but only works if `p` is known to be a prime greater than `2`.
     *
     * From https://en.wikipedia.org/wiki/Fermat%27s_little_theorem[Fermat's little theorem], we know that if p is
     * prime, then `a**(p-1) ≡ 1 mod p`. As a consequence, we have `a * a**(p-2) ≡ 1 mod p`, which means that
     * `a**(p-2)` is the modular multiplicative inverse of a in Fp.
     *
     * NOTE: this function does NOT check that `p` is a prime greater than `2`.
     */
    function invModPrime(uint256 a, uint256 p) internal view returns (uint256) {
        unchecked {
            return Math.modExp(a, p - 2, p);
        }
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m)
     *
     * Requirements:
     * - modulus can't be zero
     * - underlying staticcall to precompile must succeed
     *
     * IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make
     * sure the chain you're using it on supports the precompiled contract for modular exponentiation
     * at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise,
     * the underlying function will succeed given the lack of a revert, but the result may be incorrectly
     * interpreted as 0.
     */
    function modExp(uint256 b, uint256 e, uint256 m) internal view returns (uint256) {
        (bool success, uint256 result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m).
     * It includes a success flag indicating if the operation succeeded. Operation will be marked as failed if trying
     * to operate modulo 0 or if the underlying precompile reverted.
     *
     * IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain
     * you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in
     * https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack
     * of a revert, but the result may be incorrectly interpreted as 0.
     */
    function tryModExp(uint256 b, uint256 e, uint256 m) internal view returns (bool success, uint256 result) {
        if (m == 0) return (false, 0);
        assembly ("memory-safe") {
            let ptr := mload(0x40)
            // | Offset    | Content    | Content (Hex)                                                      |
            // |-----------|------------|--------------------------------------------------------------------|
            // | 0x00:0x1f | size of b  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x20:0x3f | size of e  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x40:0x5f | size of m  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x60:0x7f | value of b | 0x<.............................................................b> |
            // | 0x80:0x9f | value of e | 0x<.............................................................e> |
            // | 0xa0:0xbf | value of m | 0x<.............................................................m> |
            mstore(ptr, 0x20)
            mstore(add(ptr, 0x20), 0x20)
            mstore(add(ptr, 0x40), 0x20)
            mstore(add(ptr, 0x60), b)
            mstore(add(ptr, 0x80), e)
            mstore(add(ptr, 0xa0), m)

            // Given the result < m, it's guaranteed to fit in 32 bytes,
            // so we can use the memory scratch space located at offset 0.
            success := staticcall(gas(), 0x05, ptr, 0xc0, 0x00, 0x20)
            result := mload(0x00)
        }
    }

    /**
     * @dev Variant of {modExp} that supports inputs of arbitrary length.
     */
    function modExp(bytes memory b, bytes memory e, bytes memory m) internal view returns (bytes memory) {
        (bool success, bytes memory result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Variant of {tryModExp} that supports inputs of arbitrary length.
     */
    function tryModExp(
        bytes memory b,
        bytes memory e,
        bytes memory m
    ) internal view returns (bool success, bytes memory result) {
        if (_zeroBytes(m)) return (false, new bytes(0));

        uint256 mLen = m.length;

        // Encode call args in result and move the free memory pointer
        result = abi.encodePacked(b.length, e.length, mLen, b, e, m);

        assembly ("memory-safe") {
            let dataPtr := add(result, 0x20)
            // Write result on top of args to avoid allocating extra memory.
            success := staticcall(gas(), 0x05, dataPtr, mload(result), dataPtr, mLen)
            // Overwrite the length.
            // result.length > returndatasize() is guaranteed because returndatasize() == m.length
            mstore(result, mLen)
            // Set the memory pointer after the returned data.
            mstore(0x40, add(dataPtr, mLen))
        }
    }

    /**
     * @dev Returns whether the provided byte array is zero.
     */
    function _zeroBytes(bytes memory byteArray) private pure returns (bool) {
        for (uint256 i = 0; i < byteArray.length; ++i) {
            if (byteArray[i] != 0) {
                return false;
            }
        }
        return true;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * This method is based on Newton's method for computing square roots; the algorithm is restricted to only
     * using integer operations.
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        unchecked {
            // Take care of easy edge cases when a == 0 or a == 1
            if (a <= 1) {
                return a;
            }

            // In this function, we use Newton's method to get a root of `f(x) := x² - a`. It involves building a
            // sequence x_n that converges toward sqrt(a). For each iteration x_n, we also define the error between
            // the current value as `ε_n = | x_n - sqrt(a) |`.
            //
            // For our first estimation, we consider `e` the smallest power of 2 which is bigger than the square root
            // of the target. (i.e. `2**(e-1) ≤ sqrt(a) < 2**e`). We know that `e ≤ 128` because `(2¹²⁸)² = 2²⁵⁶` is
            // bigger than any uint256.
            //
            // By noticing that
            // `2**(e-1) ≤ sqrt(a) < 2**e → (2**(e-1))² ≤ a < (2**e)² → 2**(2*e-2) ≤ a < 2**(2*e)`
            // we can deduce that `e - 1` is `log2(a) / 2`. We can thus compute `x_n = 2**(e-1)` using a method similar
            // to the msb function.
            uint256 aa = a;
            uint256 xn = 1;

            if (aa >= (1 << 128)) {
                aa >>= 128;
                xn <<= 64;
            }
            if (aa >= (1 << 64)) {
                aa >>= 64;
                xn <<= 32;
            }
            if (aa >= (1 << 32)) {
                aa >>= 32;
                xn <<= 16;
            }
            if (aa >= (1 << 16)) {
                aa >>= 16;
                xn <<= 8;
            }
            if (aa >= (1 << 8)) {
                aa >>= 8;
                xn <<= 4;
            }
            if (aa >= (1 << 4)) {
                aa >>= 4;
                xn <<= 2;
            }
            if (aa >= (1 << 2)) {
                xn <<= 1;
            }

            // We now have x_n such that `x_n = 2**(e-1) ≤ sqrt(a) < 2**e = 2 * x_n`. This implies ε_n ≤ 2**(e-1).
            //
            // We can refine our estimation by noticing that the middle of that interval minimizes the error.
            // If we move x_n to equal 2**(e-1) + 2**(e-2), then we reduce the error to ε_n ≤ 2**(e-2).
            // This is going to be our x_0 (and ε_0)
            xn = (3 * xn) >> 1; // ε_0 := | x_0 - sqrt(a) | ≤ 2**(e-2)

            // From here, Newton's method give us:
            // x_{n+1} = (x_n + a / x_n) / 2
            //
            // One should note that:
            // x_{n+1}² - a = ((x_n + a / x_n) / 2)² - a
            //              = ((x_n² + a) / (2 * x_n))² - a
            //              = (x_n⁴ + 2 * a * x_n² + a²) / (4 * x_n²) - a
            //              = (x_n⁴ + 2 * a * x_n² + a² - 4 * a * x_n²) / (4 * x_n²)
            //              = (x_n⁴ - 2 * a * x_n² + a²) / (4 * x_n²)
            //              = (x_n² - a)² / (2 * x_n)²
            //              = ((x_n² - a) / (2 * x_n))²
            //              ≥ 0
            // Which proves that for all n ≥ 1, sqrt(a) ≤ x_n
            //
            // This gives us the proof of quadratic convergence of the sequence:
            // ε_{n+1} = | x_{n+1} - sqrt(a) |
            //         = | (x_n + a / x_n) / 2 - sqrt(a) |
            //         = | (x_n² + a - 2*x_n*sqrt(a)) / (2 * x_n) |
            //         = | (x_n - sqrt(a))² / (2 * x_n) |
            //         = | ε_n² / (2 * x_n) |
            //         = ε_n² / | (2 * x_n) |
            //
            // For the first iteration, we have a special case where x_0 is known:
            // ε_1 = ε_0² / | (2 * x_0) |
            //     ≤ (2**(e-2))² / (2 * (2**(e-1) + 2**(e-2)))
            //     ≤ 2**(2*e-4) / (3 * 2**(e-1))
            //     ≤ 2**(e-3) / 3
            //     ≤ 2**(e-3-log2(3))
            //     ≤ 2**(e-4.5)
            //
            // For the following iterations, we use the fact that, 2**(e-1) ≤ sqrt(a) ≤ x_n:
            // ε_{n+1} = ε_n² / | (2 * x_n) |
            //         ≤ (2**(e-k))² / (2 * 2**(e-1))
            //         ≤ 2**(2*e-2*k) / 2**e
            //         ≤ 2**(e-2*k)
            xn = (xn + a / xn) >> 1; // ε_1 := | x_1 - sqrt(a) | ≤ 2**(e-4.5)  -- special case, see above
            xn = (xn + a / xn) >> 1; // ε_2 := | x_2 - sqrt(a) | ≤ 2**(e-9)    -- general case with k = 4.5
            xn = (xn + a / xn) >> 1; // ε_3 := | x_3 - sqrt(a) | ≤ 2**(e-18)   -- general case with k = 9
            xn = (xn + a / xn) >> 1; // ε_4 := | x_4 - sqrt(a) | ≤ 2**(e-36)   -- general case with k = 18
            xn = (xn + a / xn) >> 1; // ε_5 := | x_5 - sqrt(a) | ≤ 2**(e-72)   -- general case with k = 36
            xn = (xn + a / xn) >> 1; // ε_6 := | x_6 - sqrt(a) | ≤ 2**(e-144)  -- general case with k = 72

            // Because e ≤ 128 (as discussed during the first estimation phase), we know have reached a precision
            // ε_6 ≤ 2**(e-144) < 1. Given we're operating on integers, then we can ensure that xn is now either
            // sqrt(a) or sqrt(a) + 1.
            return xn - SafeCast.toUint(xn > a / xn);
        }
    }

    /**
     * @dev 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 + SafeCast.toUint(unsignedRoundsUp(rounding) && result * result < a);
        }
    }

    /**
     * @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;
        uint256 exp;
        unchecked {
            exp = 128 * SafeCast.toUint(value > (1 << 128) - 1);
            value >>= exp;
            result += exp;

            exp = 64 * SafeCast.toUint(value > (1 << 64) - 1);
            value >>= exp;
            result += exp;

            exp = 32 * SafeCast.toUint(value > (1 << 32) - 1);
            value >>= exp;
            result += exp;

            exp = 16 * SafeCast.toUint(value > (1 << 16) - 1);
            value >>= exp;
            result += exp;

            exp = 8 * SafeCast.toUint(value > (1 << 8) - 1);
            value >>= exp;
            result += exp;

            exp = 4 * SafeCast.toUint(value > (1 << 4) - 1);
            value >>= exp;
            result += exp;

            exp = 2 * SafeCast.toUint(value > (1 << 2) - 1);
            value >>= exp;
            result += exp;

            result += SafeCast.toUint(value > 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 + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << result < value);
        }
    }

    /**
     * @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 + SafeCast.toUint(unsignedRoundsUp(rounding) && 10 ** result < value);
        }
    }

    /**
     * @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;
        uint256 isGt;
        unchecked {
            isGt = SafeCast.toUint(value > (1 << 128) - 1);
            value >>= isGt * 128;
            result += isGt * 16;

            isGt = SafeCast.toUint(value > (1 << 64) - 1);
            value >>= isGt * 64;
            result += isGt * 8;

            isGt = SafeCast.toUint(value > (1 << 32) - 1);
            value >>= isGt * 32;
            result += isGt * 4;

            isGt = SafeCast.toUint(value > (1 << 16) - 1);
            value >>= isGt * 16;
            result += isGt * 2;

            result += SafeCast.toUint(value > (1 << 8) - 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 + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << (result << 3) < value);
        }
    }

    /**
     * @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;
    }
}
SafeCast.sol 1162 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.20;

/**
 * @dev Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeCast {
    /**
     * @dev Value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);

    /**
     * @dev An int value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedIntToUint(int256 value);

    /**
     * @dev Value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);

    /**
     * @dev An uint value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedUintToInt(uint256 value);

    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        if (value > type(uint248).max) {
            revert SafeCastOverflowedUintDowncast(248, value);
        }
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        if (value > type(uint240).max) {
            revert SafeCastOverflowedUintDowncast(240, value);
        }
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        if (value > type(uint232).max) {
            revert SafeCastOverflowedUintDowncast(232, value);
        }
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        if (value > type(uint224).max) {
            revert SafeCastOverflowedUintDowncast(224, value);
        }
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        if (value > type(uint216).max) {
            revert SafeCastOverflowedUintDowncast(216, value);
        }
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        if (value > type(uint208).max) {
            revert SafeCastOverflowedUintDowncast(208, value);
        }
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        if (value > type(uint200).max) {
            revert SafeCastOverflowedUintDowncast(200, value);
        }
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        if (value > type(uint192).max) {
            revert SafeCastOverflowedUintDowncast(192, value);
        }
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        if (value > type(uint184).max) {
            revert SafeCastOverflowedUintDowncast(184, value);
        }
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        if (value > type(uint176).max) {
            revert SafeCastOverflowedUintDowncast(176, value);
        }
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        if (value > type(uint168).max) {
            revert SafeCastOverflowedUintDowncast(168, value);
        }
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) {
            revert SafeCastOverflowedUintDowncast(160, value);
        }
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        if (value > type(uint152).max) {
            revert SafeCastOverflowedUintDowncast(152, value);
        }
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        if (value > type(uint144).max) {
            revert SafeCastOverflowedUintDowncast(144, value);
        }
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        if (value > type(uint136).max) {
            revert SafeCastOverflowedUintDowncast(136, value);
        }
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        if (value > type(uint128).max) {
            revert SafeCastOverflowedUintDowncast(128, value);
        }
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        if (value > type(uint120).max) {
            revert SafeCastOverflowedUintDowncast(120, value);
        }
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        if (value > type(uint112).max) {
            revert SafeCastOverflowedUintDowncast(112, value);
        }
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        if (value > type(uint104).max) {
            revert SafeCastOverflowedUintDowncast(104, value);
        }
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        if (value > type(uint96).max) {
            revert SafeCastOverflowedUintDowncast(96, value);
        }
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        if (value > type(uint88).max) {
            revert SafeCastOverflowedUintDowncast(88, value);
        }
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        if (value > type(uint80).max) {
            revert SafeCastOverflowedUintDowncast(80, value);
        }
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        if (value > type(uint72).max) {
            revert SafeCastOverflowedUintDowncast(72, value);
        }
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        if (value > type(uint64).max) {
            revert SafeCastOverflowedUintDowncast(64, value);
        }
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        if (value > type(uint56).max) {
            revert SafeCastOverflowedUintDowncast(56, value);
        }
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        if (value > type(uint48).max) {
            revert SafeCastOverflowedUintDowncast(48, value);
        }
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        if (value > type(uint40).max) {
            revert SafeCastOverflowedUintDowncast(40, value);
        }
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        if (value > type(uint32).max) {
            revert SafeCastOverflowedUintDowncast(32, value);
        }
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        if (value > type(uint24).max) {
            revert SafeCastOverflowedUintDowncast(24, value);
        }
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        if (value > type(uint16).max) {
            revert SafeCastOverflowedUintDowncast(16, value);
        }
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        if (value > type(uint8).max) {
            revert SafeCastOverflowedUintDowncast(8, value);
        }
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        if (value < 0) {
            revert SafeCastOverflowedIntToUint(value);
        }
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(248, value);
        }
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(240, value);
        }
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(232, value);
        }
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(224, value);
        }
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(216, value);
        }
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(208, value);
        }
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(200, value);
        }
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(192, value);
        }
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(184, value);
        }
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(176, value);
        }
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(168, value);
        }
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(160, value);
        }
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(152, value);
        }
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(144, value);
        }
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(136, value);
        }
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(128, value);
        }
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(120, value);
        }
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(112, value);
        }
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(104, value);
        }
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(96, value);
        }
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(88, value);
        }
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(80, value);
        }
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(72, value);
        }
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(64, value);
        }
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(56, value);
        }
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(48, value);
        }
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(40, value);
        }
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(32, value);
        }
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(24, value);
        }
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(16, value);
        }
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(8, value);
        }
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        if (value > uint256(type(int256).max)) {
            revert SafeCastOverflowedUintToInt(value);
        }
        return int256(value);
    }

    /**
     * @dev Cast a boolean (false or true) to a uint256 (0 or 1) with no jump.
     */
    function toUint(bool b) internal pure returns (uint256 u) {
        assembly ("memory-safe") {
            u := iszero(iszero(b))
        }
    }
}
Ownable.sol 278 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Simple single owner authorization mixin.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/auth/Ownable.sol)
///
/// @dev Note:
/// This implementation does NOT auto-initialize the owner to `msg.sender`.
/// You MUST call the `_initializeOwner` in the constructor / initializer.
///
/// While the ownable portion follows
/// [EIP-173](https://eips.ethereum.org/EIPS/eip-173) for compatibility,
/// the nomenclature for the 2-step ownership handover may be unique to this codebase.
abstract contract Ownable {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The caller is not authorized to call the function.
    error Unauthorized();

    /// @dev The `newOwner` cannot be the zero address.
    error NewOwnerIsZeroAddress();

    /// @dev The `pendingOwner` does not have a valid handover request.
    error NoHandoverRequest();

    /// @dev Cannot double-initialize.
    error AlreadyInitialized();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                           EVENTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The ownership is transferred from `oldOwner` to `newOwner`.
    /// This event is intentionally kept the same as OpenZeppelin's Ownable to be
    /// compatible with indexers and [EIP-173](https://eips.ethereum.org/EIPS/eip-173),
    /// despite it not being as lightweight as a single argument event.
    event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);

    /// @dev An ownership handover to `pendingOwner` has been requested.
    event OwnershipHandoverRequested(address indexed pendingOwner);

    /// @dev The ownership handover to `pendingOwner` has been canceled.
    event OwnershipHandoverCanceled(address indexed pendingOwner);

    /// @dev `keccak256(bytes("OwnershipTransferred(address,address)"))`.
    uint256 private constant _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE =
        0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0;

    /// @dev `keccak256(bytes("OwnershipHandoverRequested(address)"))`.
    uint256 private constant _OWNERSHIP_HANDOVER_REQUESTED_EVENT_SIGNATURE =
        0xdbf36a107da19e49527a7176a1babf963b4b0ff8cde35ee35d6cd8f1f9ac7e1d;

    /// @dev `keccak256(bytes("OwnershipHandoverCanceled(address)"))`.
    uint256 private constant _OWNERSHIP_HANDOVER_CANCELED_EVENT_SIGNATURE =
        0xfa7b8eab7da67f412cc9575ed43464468f9bfbae89d1675917346ca6d8fe3c92;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STORAGE                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The owner slot is given by:
    /// `bytes32(~uint256(uint32(bytes4(keccak256("_OWNER_SLOT_NOT")))))`.
    /// It is intentionally chosen to be a high value
    /// to avoid collision with lower slots.
    /// The choice of manual storage layout is to enable compatibility
    /// with both regular and upgradeable contracts.
    bytes32 internal constant _OWNER_SLOT =
        0xffffffffffffffffffffffffffffffffffffffffffffffffffffffff74873927;

    /// The ownership handover slot of `newOwner` is given by:
    /// ```
    ///     mstore(0x00, or(shl(96, user), _HANDOVER_SLOT_SEED))
    ///     let handoverSlot := keccak256(0x00, 0x20)
    /// ```
    /// It stores the expiry timestamp of the two-step ownership handover.
    uint256 private constant _HANDOVER_SLOT_SEED = 0x389a75e1;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     INTERNAL FUNCTIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Override to return true to make `_initializeOwner` prevent double-initialization.
    function _guardInitializeOwner() internal pure virtual returns (bool guard) {}

    /// @dev Initializes the owner directly without authorization guard.
    /// This function must be called upon initialization,
    /// regardless of whether the contract is upgradeable or not.
    /// This is to enable generalization to both regular and upgradeable contracts,
    /// and to save gas in case the initial owner is not the caller.
    /// For performance reasons, this function will not check if there
    /// is an existing owner.
    function _initializeOwner(address newOwner) internal virtual {
        if (_guardInitializeOwner()) {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                if sload(ownerSlot) {
                    mstore(0x00, 0x0dc149f0) // `AlreadyInitialized()`.
                    revert(0x1c, 0x04)
                }
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Store the new value.
                sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
            }
        } else {
            /// @solidity memory-safe-assembly
            assembly {
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Store the new value.
                sstore(_OWNER_SLOT, newOwner)
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
            }
        }
    }

    /// @dev Sets the owner directly without authorization guard.
    function _setOwner(address newOwner) internal virtual {
        if (_guardInitializeOwner()) {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
                // Store the new value.
                sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
            }
        } else {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
                // Store the new value.
                sstore(ownerSlot, newOwner)
            }
        }
    }

    /// @dev Throws if the sender is not the owner.
    function _checkOwner() internal view virtual {
        /// @solidity memory-safe-assembly
        assembly {
            // If the caller is not the stored owner, revert.
            if iszero(eq(caller(), sload(_OWNER_SLOT))) {
                mstore(0x00, 0x82b42900) // `Unauthorized()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Returns how long a two-step ownership handover is valid for in seconds.
    /// Override to return a different value if needed.
    /// Made internal to conserve bytecode. Wrap it in a public function if needed.
    function _ownershipHandoverValidFor() internal view virtual returns (uint64) {
        return 48 * 3600;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  PUBLIC UPDATE FUNCTIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Allows the owner to transfer the ownership to `newOwner`.
    function transferOwnership(address newOwner) public payable virtual onlyOwner {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(shl(96, newOwner)) {
                mstore(0x00, 0x7448fbae) // `NewOwnerIsZeroAddress()`.
                revert(0x1c, 0x04)
            }
        }
        _setOwner(newOwner);
    }

    /// @dev Allows the owner to renounce their ownership.
    function renounceOwnership() public payable virtual onlyOwner {
        _setOwner(address(0));
    }

    /// @dev Request a two-step ownership handover to the caller.
    /// The request will automatically expire in 48 hours (172800 seconds) by default.
    function requestOwnershipHandover() public payable virtual {
        unchecked {
            uint256 expires = block.timestamp + _ownershipHandoverValidFor();
            /// @solidity memory-safe-assembly
            assembly {
                // Compute and set the handover slot to `expires`.
                mstore(0x0c, _HANDOVER_SLOT_SEED)
                mstore(0x00, caller())
                sstore(keccak256(0x0c, 0x20), expires)
                // Emit the {OwnershipHandoverRequested} event.
                log2(0, 0, _OWNERSHIP_HANDOVER_REQUESTED_EVENT_SIGNATURE, caller())
            }
        }
    }

    /// @dev Cancels the two-step ownership handover to the caller, if any.
    function cancelOwnershipHandover() public payable virtual {
        /// @solidity memory-safe-assembly
        assembly {
            // Compute and set the handover slot to 0.
            mstore(0x0c, _HANDOVER_SLOT_SEED)
            mstore(0x00, caller())
            sstore(keccak256(0x0c, 0x20), 0)
            // Emit the {OwnershipHandoverCanceled} event.
            log2(0, 0, _OWNERSHIP_HANDOVER_CANCELED_EVENT_SIGNATURE, caller())
        }
    }

    /// @dev Allows the owner to complete the two-step ownership handover to `pendingOwner`.
    /// Reverts if there is no existing ownership handover requested by `pendingOwner`.
    function completeOwnershipHandover(address pendingOwner) public payable virtual onlyOwner {
        /// @solidity memory-safe-assembly
        assembly {
            // Compute and set the handover slot to 0.
            mstore(0x0c, _HANDOVER_SLOT_SEED)
            mstore(0x00, pendingOwner)
            let handoverSlot := keccak256(0x0c, 0x20)
            // If the handover does not exist, or has expired.
            if gt(timestamp(), sload(handoverSlot)) {
                mstore(0x00, 0x6f5e8818) // `NoHandoverRequest()`.
                revert(0x1c, 0x04)
            }
            // Set the handover slot to 0.
            sstore(handoverSlot, 0)
        }
        _setOwner(pendingOwner);
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   PUBLIC READ FUNCTIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the owner of the contract.
    function owner() public view virtual returns (address result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := sload(_OWNER_SLOT)
        }
    }

    /// @dev Returns the expiry timestamp for the two-step ownership handover to `pendingOwner`.
    function ownershipHandoverExpiresAt(address pendingOwner)
        public
        view
        virtual
        returns (uint256 result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the handover slot.
            mstore(0x0c, _HANDOVER_SLOT_SEED)
            mstore(0x00, pendingOwner)
            // Load the handover slot.
            result := sload(keccak256(0x0c, 0x20))
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         MODIFIERS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Marks a function as only callable by the owner.
    modifier onlyOwner() virtual {
        _checkOwner();
        _;
    }
}
CREATE3.sol 128 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Deterministic deployments agnostic to the initialization code.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/CREATE3.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/CREATE3.sol)
/// @author Modified from 0xSequence (https://github.com/0xSequence/create3/blob/master/contracts/Create3.sol)
library CREATE3 {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        CUSTOM ERRORS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Unable to deploy the contract.
    error DeploymentFailed();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      BYTECODE CONSTANTS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /**
     * -------------------------------------------------------------------+
     * Opcode      | Mnemonic         | Stack        | Memory             |
     * -------------------------------------------------------------------|
     * 36          | CALLDATASIZE     | cds          |                    |
     * 3d          | RETURNDATASIZE   | 0 cds        |                    |
     * 3d          | RETURNDATASIZE   | 0 0 cds      |                    |
     * 37          | CALLDATACOPY     |              | [0..cds): calldata |
     * 36          | CALLDATASIZE     | cds          | [0..cds): calldata |
     * 3d          | RETURNDATASIZE   | 0 cds        | [0..cds): calldata |
     * 34          | CALLVALUE        | value 0 cds  | [0..cds): calldata |
     * f0          | CREATE           | newContract  | [0..cds): calldata |
     * -------------------------------------------------------------------|
     * Opcode      | Mnemonic         | Stack        | Memory             |
     * -------------------------------------------------------------------|
     * 67 bytecode | PUSH8 bytecode   | bytecode     |                    |
     * 3d          | RETURNDATASIZE   | 0 bytecode   |                    |
     * 52          | MSTORE           |              | [0..8): bytecode   |
     * 60 0x08     | PUSH1 0x08       | 0x08         | [0..8): bytecode   |
     * 60 0x18     | PUSH1 0x18       | 0x18 0x08    | [0..8): bytecode   |
     * f3          | RETURN           |              | [0..8): bytecode   |
     * -------------------------------------------------------------------+
     */

    /// @dev The proxy initialization code.
    uint256 private constant _PROXY_INITCODE = 0x67363d3d37363d34f03d5260086018f3;

    /// @dev Hash of the `_PROXY_INITCODE`.
    /// Equivalent to `keccak256(abi.encodePacked(hex"67363d3d37363d34f03d5260086018f3"))`.
    bytes32 internal constant PROXY_INITCODE_HASH =
        0x21c35dbe1b344a2488cf3321d6ce542f8e9f305544ff09e4993a62319a497c1f;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      CREATE3 OPERATIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Deploys `initCode` deterministically with a `salt`.
    /// Returns the deterministic address of the deployed contract,
    /// which solely depends on `salt`.
    function deployDeterministic(bytes memory initCode, bytes32 salt)
        internal
        returns (address deployed)
    {
        deployed = deployDeterministic(0, initCode, salt);
    }

    /// @dev Deploys `initCode` deterministically with a `salt`.
    /// The deployed contract is funded with `value` (in wei) ETH.
    /// Returns the deterministic address of the deployed contract,
    /// which solely depends on `salt`.
    function deployDeterministic(uint256 value, bytes memory initCode, bytes32 salt)
        internal
        returns (address deployed)
    {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, _PROXY_INITCODE) // Store the `_PROXY_INITCODE`.
            let proxy := create2(0, 0x10, 0x10, salt)
            if iszero(proxy) {
                mstore(0x00, 0x30116425) // `DeploymentFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x14, proxy) // Store the proxy's address.
            // 0xd6 = 0xc0 (short RLP prefix) + 0x16 (length of: 0x94 ++ proxy ++ 0x01).
            // 0x94 = 0x80 + 0x14 (0x14 = the length of an address, 20 bytes, in hex).
            mstore(0x00, 0xd694)
            mstore8(0x34, 0x01) // Nonce of the proxy contract (1).
            deployed := keccak256(0x1e, 0x17)
            if iszero(
                mul( // The arguments of `mul` are evaluated last to first.
                    extcodesize(deployed),
                    call(gas(), proxy, value, add(initCode, 0x20), mload(initCode), 0x00, 0x00)
                )
            ) {
                mstore(0x00, 0x30116425) // `DeploymentFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Returns the deterministic address for `salt`.
    function predictDeterministicAddress(bytes32 salt) internal view returns (address deployed) {
        deployed = predictDeterministicAddress(salt, address(this));
    }

    /// @dev Returns the deterministic address for `salt` with `deployer`.
    function predictDeterministicAddress(bytes32 salt, address deployer)
        internal
        pure
        returns (address deployed)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x00, deployer) // Store `deployer`.
            mstore8(0x0b, 0xff) // Store the prefix.
            mstore(0x20, salt) // Store the salt.
            mstore(0x40, PROXY_INITCODE_HASH) // Store the bytecode hash.

            mstore(0x14, keccak256(0x0b, 0x55)) // Store the proxy's address.
            mstore(0x40, m) // Restore the free memory pointer.
            // 0xd6 = 0xc0 (short RLP prefix) + 0x16 (length of: 0x94 ++ proxy ++ 0x01).
            // 0x94 = 0x80 + 0x14 (0x14 = the length of an address, 20 bytes, in hex).
            mstore(0x00, 0xd694)
            mstore8(0x34, 0x01) // Nonce of the proxy contract (1).
            deployed := keccak256(0x1e, 0x17)
        }
    }
}
EnumerableSetLib.sol 814 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Library for managing enumerable sets in storage.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/EnumerableSetLib.sol)
///
/// @dev Note:
/// In many applications, the number of elements in an enumerable set is small.
/// This enumerable set implementation avoids storing the length and indices
/// for up to 3 elements. Once the length exceeds 3 for the first time, the length
/// and indices will be initialized. The amortized cost of adding elements is O(1).
///
/// The AddressSet implementation packs the length with the 0th entry.
///
/// All enumerable sets except Uint8Set use a pop and swap mechanism to remove elements.
/// This means that the iteration order of elements can change between element removals.
library EnumerableSetLib {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The index must be less than the length.
    error IndexOutOfBounds();

    /// @dev The value cannot be the zero sentinel.
    error ValueIsZeroSentinel();

    /// @dev Cannot accommodate a new unique value with the capacity.
    error ExceedsCapacity();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev A sentinel value to denote the zero value in storage.
    /// No elements can be equal to this value.
    /// `uint72(bytes9(keccak256(bytes("_ZERO_SENTINEL"))))`.
    uint256 private constant _ZERO_SENTINEL = 0xfbb67fda52d4bfb8bf;

    /// @dev The storage layout is given by:
    /// ```
    ///     mstore(0x04, _ENUMERABLE_ADDRESS_SET_SLOT_SEED)
    ///     mstore(0x00, set.slot)
    ///     let rootSlot := keccak256(0x00, 0x24)
    ///     mstore(0x20, rootSlot)
    ///     mstore(0x00, shr(96, shl(96, value)))
    ///     let positionSlot := keccak256(0x00, 0x40)
    ///     let valueSlot := add(rootSlot, sload(positionSlot))
    ///     let valueInStorage := shr(96, sload(valueSlot))
    ///     let lazyLength := shr(160, shl(160, sload(rootSlot)))
    /// ```
    uint256 private constant _ENUMERABLE_ADDRESS_SET_SLOT_SEED = 0x978aab92;

    /// @dev The storage layout is given by:
    /// ```
    ///     mstore(0x04, _ENUMERABLE_WORD_SET_SLOT_SEED)
    ///     mstore(0x00, set.slot)
    ///     let rootSlot := keccak256(0x00, 0x24)
    ///     mstore(0x20, rootSlot)
    ///     mstore(0x00, value)
    ///     let positionSlot := keccak256(0x00, 0x40)
    ///     let valueSlot := add(rootSlot, sload(positionSlot))
    ///     let valueInStorage := sload(valueSlot)
    ///     let lazyLength := sload(not(rootSlot))
    /// ```
    uint256 private constant _ENUMERABLE_WORD_SET_SLOT_SEED = 0x18fb5864;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STRUCTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev An enumerable address set in storage.
    struct AddressSet {
        uint256 _spacer;
    }

    /// @dev An enumerable bytes32 set in storage.
    struct Bytes32Set {
        uint256 _spacer;
    }

    /// @dev An enumerable uint256 set in storage.
    struct Uint256Set {
        uint256 _spacer;
    }

    /// @dev An enumerable int256 set in storage.
    struct Int256Set {
        uint256 _spacer;
    }

    /// @dev An enumerable uint8 set in storage. Useful for enums.
    struct Uint8Set {
        uint256 data;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     GETTERS / SETTERS                      */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the number of elements in the set.
    function length(AddressSet storage set) internal view returns (uint256 result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            let rootPacked := sload(rootSlot)
            let n := shr(160, shl(160, rootPacked))
            result := shr(1, n)
            for {} iszero(or(iszero(shr(96, rootPacked)), n)) {} {
                result := 1
                if iszero(sload(add(rootSlot, result))) { break }
                result := 2
                if iszero(sload(add(rootSlot, result))) { break }
                result := 3
                break
            }
        }
    }

    /// @dev Returns the number of elements in the set.
    function length(Bytes32Set storage set) internal view returns (uint256 result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            let n := sload(not(rootSlot))
            result := shr(1, n)
            for {} iszero(n) {} {
                result := 0
                if iszero(sload(add(rootSlot, result))) { break }
                result := 1
                if iszero(sload(add(rootSlot, result))) { break }
                result := 2
                if iszero(sload(add(rootSlot, result))) { break }
                result := 3
                break
            }
        }
    }

    /// @dev Returns the number of elements in the set.
    function length(Uint256Set storage set) internal view returns (uint256 result) {
        result = length(_toBytes32Set(set));
    }

    /// @dev Returns the number of elements in the set.
    function length(Int256Set storage set) internal view returns (uint256 result) {
        result = length(_toBytes32Set(set));
    }

    /// @dev Returns the number of elements in the set.
    function length(Uint8Set storage set) internal view returns (uint256 result) {
        /// @solidity memory-safe-assembly
        assembly {
            for { let packed := sload(set.slot) } packed { result := add(1, result) } {
                packed := xor(packed, and(packed, add(1, not(packed))))
            }
        }
    }

    /// @dev Returns whether `value` is in the set.
    function contains(AddressSet storage set, address value) internal view returns (bool result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            value := shr(96, shl(96, value))
            if eq(value, _ZERO_SENTINEL) {
                mstore(0x00, 0xf5a267f1) // `ValueIsZeroSentinel()`.
                revert(0x1c, 0x04)
            }
            if iszero(value) { value := _ZERO_SENTINEL }
            let rootPacked := sload(rootSlot)
            for {} 1 {} {
                if iszero(shr(160, shl(160, rootPacked))) {
                    result := 1
                    if eq(shr(96, rootPacked), value) { break }
                    if eq(shr(96, sload(add(rootSlot, 1))), value) { break }
                    if eq(shr(96, sload(add(rootSlot, 2))), value) { break }
                    result := 0
                    break
                }
                mstore(0x20, rootSlot)
                mstore(0x00, value)
                result := iszero(iszero(sload(keccak256(0x00, 0x40))))
                break
            }
        }
    }

    /// @dev Returns whether `value` is in the set.
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            if eq(value, _ZERO_SENTINEL) {
                mstore(0x00, 0xf5a267f1) // `ValueIsZeroSentinel()`.
                revert(0x1c, 0x04)
            }
            if iszero(value) { value := _ZERO_SENTINEL }
            for {} 1 {} {
                if iszero(sload(not(rootSlot))) {
                    result := 1
                    if eq(sload(rootSlot), value) { break }
                    if eq(sload(add(rootSlot, 1)), value) { break }
                    if eq(sload(add(rootSlot, 2)), value) { break }
                    result := 0
                    break
                }
                mstore(0x20, rootSlot)
                mstore(0x00, value)
                result := iszero(iszero(sload(keccak256(0x00, 0x40))))
                break
            }
        }
    }

    /// @dev Returns whether `value` is in the set.
    function contains(Uint256Set storage set, uint256 value) internal view returns (bool result) {
        result = contains(_toBytes32Set(set), bytes32(value));
    }

    /// @dev Returns whether `value` is in the set.
    function contains(Int256Set storage set, int256 value) internal view returns (bool result) {
        result = contains(_toBytes32Set(set), bytes32(uint256(value)));
    }

    /// @dev Returns whether `value` is in the set.
    function contains(Uint8Set storage set, uint8 value) internal view returns (bool result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := and(1, shr(and(0xff, value), sload(set.slot)))
        }
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    function add(AddressSet storage set, address value) internal returns (bool result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            value := shr(96, shl(96, value))
            if eq(value, _ZERO_SENTINEL) {
                mstore(0x00, 0xf5a267f1) // `ValueIsZeroSentinel()`.
                revert(0x1c, 0x04)
            }
            if iszero(value) { value := _ZERO_SENTINEL }
            let rootPacked := sload(rootSlot)
            for { let n := shr(160, shl(160, rootPacked)) } 1 {} {
                mstore(0x20, rootSlot)
                if iszero(n) {
                    let v0 := shr(96, rootPacked)
                    if iszero(v0) {
                        sstore(rootSlot, shl(96, value))
                        result := 1
                        break
                    }
                    if eq(v0, value) { break }
                    let v1 := shr(96, sload(add(rootSlot, 1)))
                    if iszero(v1) {
                        sstore(add(rootSlot, 1), shl(96, value))
                        result := 1
                        break
                    }
                    if eq(v1, value) { break }
                    let v2 := shr(96, sload(add(rootSlot, 2)))
                    if iszero(v2) {
                        sstore(add(rootSlot, 2), shl(96, value))
                        result := 1
                        break
                    }
                    if eq(v2, value) { break }
                    mstore(0x00, v0)
                    sstore(keccak256(0x00, 0x40), 1)
                    mstore(0x00, v1)
                    sstore(keccak256(0x00, 0x40), 2)
                    mstore(0x00, v2)
                    sstore(keccak256(0x00, 0x40), 3)
                    rootPacked := or(rootPacked, 7)
                    n := 7
                }
                mstore(0x00, value)
                let p := keccak256(0x00, 0x40)
                if iszero(sload(p)) {
                    n := shr(1, n)
                    result := 1
                    sstore(p, add(1, n))
                    if iszero(n) {
                        sstore(rootSlot, or(3, shl(96, value)))
                        break
                    }
                    sstore(add(rootSlot, n), shl(96, value))
                    sstore(rootSlot, add(2, rootPacked))
                    break
                }
                break
            }
        }
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            if eq(value, _ZERO_SENTINEL) {
                mstore(0x00, 0xf5a267f1) // `ValueIsZeroSentinel()`.
                revert(0x1c, 0x04)
            }
            if iszero(value) { value := _ZERO_SENTINEL }
            for { let n := sload(not(rootSlot)) } 1 {} {
                mstore(0x20, rootSlot)
                if iszero(n) {
                    let v0 := sload(rootSlot)
                    if iszero(v0) {
                        sstore(rootSlot, value)
                        result := 1
                        break
                    }
                    if eq(v0, value) { break }
                    let v1 := sload(add(rootSlot, 1))
                    if iszero(v1) {
                        sstore(add(rootSlot, 1), value)
                        result := 1
                        break
                    }
                    if eq(v1, value) { break }
                    let v2 := sload(add(rootSlot, 2))
                    if iszero(v2) {
                        sstore(add(rootSlot, 2), value)
                        result := 1
                        break
                    }
                    if eq(v2, value) { break }
                    mstore(0x00, v0)
                    sstore(keccak256(0x00, 0x40), 1)
                    mstore(0x00, v1)
                    sstore(keccak256(0x00, 0x40), 2)
                    mstore(0x00, v2)
                    sstore(keccak256(0x00, 0x40), 3)
                    n := 7
                }
                mstore(0x00, value)
                let p := keccak256(0x00, 0x40)
                if iszero(sload(p)) {
                    n := shr(1, n)
                    sstore(add(rootSlot, n), value)
                    sstore(p, add(1, n))
                    sstore(not(rootSlot), or(1, shl(1, add(1, n))))
                    result := 1
                    break
                }
                break
            }
        }
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    function add(Uint256Set storage set, uint256 value) internal returns (bool result) {
        result = add(_toBytes32Set(set), bytes32(value));
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    function add(Int256Set storage set, int256 value) internal returns (bool result) {
        result = add(_toBytes32Set(set), bytes32(uint256(value)));
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    function add(Uint8Set storage set, uint8 value) internal returns (bool result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := sload(set.slot)
            let mask := shl(and(0xff, value), 1)
            sstore(set.slot, or(result, mask))
            result := iszero(and(result, mask))
        }
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    /// Reverts if the set grows bigger than the custom on-the-fly capacity `cap`.
    function add(AddressSet storage set, address value, uint256 cap)
        internal
        returns (bool result)
    {
        if (result = add(set, value)) if (length(set) > cap) revert ExceedsCapacity();
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    /// Reverts if the set grows bigger than the custom on-the-fly capacity `cap`.
    function add(Bytes32Set storage set, bytes32 value, uint256 cap)
        internal
        returns (bool result)
    {
        if (result = add(set, value)) if (length(set) > cap) revert ExceedsCapacity();
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    /// Reverts if the set grows bigger than the custom on-the-fly capacity `cap`.
    function add(Uint256Set storage set, uint256 value, uint256 cap)
        internal
        returns (bool result)
    {
        if (result = add(set, value)) if (length(set) > cap) revert ExceedsCapacity();
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    /// Reverts if the set grows bigger than the custom on-the-fly capacity `cap`.
    function add(Int256Set storage set, int256 value, uint256 cap) internal returns (bool result) {
        if (result = add(set, value)) if (length(set) > cap) revert ExceedsCapacity();
    }

    /// @dev Adds `value` to the set. Returns whether `value` was not in the set.
    /// Reverts if the set grows bigger than the custom on-the-fly capacity `cap`.
    function add(Uint8Set storage set, uint8 value, uint256 cap) internal returns (bool result) {
        if (result = add(set, value)) if (length(set) > cap) revert ExceedsCapacity();
    }

    /// @dev Removes `value` from the set. Returns whether `value` was in the set.
    function remove(AddressSet storage set, address value) internal returns (bool result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            value := shr(96, shl(96, value))
            if eq(value, _ZERO_SENTINEL) {
                mstore(0x00, 0xf5a267f1) // `ValueIsZeroSentinel()`.
                revert(0x1c, 0x04)
            }
            if iszero(value) { value := _ZERO_SENTINEL }
            let rootPacked := sload(rootSlot)
            for { let n := shr(160, shl(160, rootPacked)) } 1 {} {
                if iszero(n) {
                    result := 1
                    if eq(shr(96, rootPacked), value) {
                        sstore(rootSlot, sload(add(rootSlot, 1)))
                        sstore(add(rootSlot, 1), sload(add(rootSlot, 2)))
                        sstore(add(rootSlot, 2), 0)
                        break
                    }
                    if eq(shr(96, sload(add(rootSlot, 1))), value) {
                        sstore(add(rootSlot, 1), sload(add(rootSlot, 2)))
                        sstore(add(rootSlot, 2), 0)
                        break
                    }
                    if eq(shr(96, sload(add(rootSlot, 2))), value) {
                        sstore(add(rootSlot, 2), 0)
                        break
                    }
                    result := 0
                    break
                }
                mstore(0x20, rootSlot)
                mstore(0x00, value)
                let p := keccak256(0x00, 0x40)
                let position := sload(p)
                if iszero(position) { break }
                n := sub(shr(1, n), 1)
                if iszero(eq(sub(position, 1), n)) {
                    let lastValue := shr(96, sload(add(rootSlot, n)))
                    sstore(add(rootSlot, sub(position, 1)), shl(96, lastValue))
                    mstore(0x00, lastValue)
                    sstore(keccak256(0x00, 0x40), position)
                }
                sstore(rootSlot, or(shl(96, shr(96, sload(rootSlot))), or(shl(1, n), 1)))
                sstore(p, 0)
                result := 1
                break
            }
        }
    }

    /// @dev Removes `value` from the set. Returns whether `value` was in the set.
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            if eq(value, _ZERO_SENTINEL) {
                mstore(0x00, 0xf5a267f1) // `ValueIsZeroSentinel()`.
                revert(0x1c, 0x04)
            }
            if iszero(value) { value := _ZERO_SENTINEL }
            for { let n := sload(not(rootSlot)) } 1 {} {
                if iszero(n) {
                    result := 1
                    if eq(sload(rootSlot), value) {
                        sstore(rootSlot, sload(add(rootSlot, 1)))
                        sstore(add(rootSlot, 1), sload(add(rootSlot, 2)))
                        sstore(add(rootSlot, 2), 0)
                        break
                    }
                    if eq(sload(add(rootSlot, 1)), value) {
                        sstore(add(rootSlot, 1), sload(add(rootSlot, 2)))
                        sstore(add(rootSlot, 2), 0)
                        break
                    }
                    if eq(sload(add(rootSlot, 2)), value) {
                        sstore(add(rootSlot, 2), 0)
                        break
                    }
                    result := 0
                    break
                }
                mstore(0x20, rootSlot)
                mstore(0x00, value)
                let p := keccak256(0x00, 0x40)
                let position := sload(p)
                if iszero(position) { break }
                n := sub(shr(1, n), 1)
                if iszero(eq(sub(position, 1), n)) {
                    let lastValue := sload(add(rootSlot, n))
                    sstore(add(rootSlot, sub(position, 1)), lastValue)
                    mstore(0x00, lastValue)
                    sstore(keccak256(0x00, 0x40), position)
                }
                sstore(not(rootSlot), or(shl(1, n), 1))
                sstore(p, 0)
                result := 1
                break
            }
        }
    }

    /// @dev Removes `value` from the set. Returns whether `value` was in the set.
    function remove(Uint256Set storage set, uint256 value) internal returns (bool result) {
        result = remove(_toBytes32Set(set), bytes32(value));
    }

    /// @dev Removes `value` from the set. Returns whether `value` was in the set.
    function remove(Int256Set storage set, int256 value) internal returns (bool result) {
        result = remove(_toBytes32Set(set), bytes32(uint256(value)));
    }

    /// @dev Removes `value` from the set. Returns whether `value` was in the set.
    function remove(Uint8Set storage set, uint8 value) internal returns (bool result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := sload(set.slot)
            let mask := shl(and(0xff, value), 1)
            sstore(set.slot, and(result, not(mask)))
            result := iszero(iszero(and(result, mask)))
        }
    }

    /// @dev Shorthand for `isAdd ? set.add(value, cap) : set.remove(value)`.
    function update(AddressSet storage set, address value, bool isAdd, uint256 cap)
        internal
        returns (bool)
    {
        return isAdd ? add(set, value, cap) : remove(set, value);
    }

    /// @dev Shorthand for `isAdd ? set.add(value, cap) : set.remove(value)`.
    function update(Bytes32Set storage set, bytes32 value, bool isAdd, uint256 cap)
        internal
        returns (bool)
    {
        return isAdd ? add(set, value, cap) : remove(set, value);
    }

    /// @dev Shorthand for `isAdd ? set.add(value, cap) : set.remove(value)`.
    function update(Uint256Set storage set, uint256 value, bool isAdd, uint256 cap)
        internal
        returns (bool)
    {
        return isAdd ? add(set, value, cap) : remove(set, value);
    }

    /// @dev Shorthand for `isAdd ? set.add(value, cap) : set.remove(value)`.
    function update(Int256Set storage set, int256 value, bool isAdd, uint256 cap)
        internal
        returns (bool)
    {
        return isAdd ? add(set, value, cap) : remove(set, value);
    }

    /// @dev Shorthand for `isAdd ? set.add(value, cap) : set.remove(value)`.
    function update(Uint8Set storage set, uint8 value, bool isAdd, uint256 cap)
        internal
        returns (bool)
    {
        return isAdd ? add(set, value, cap) : remove(set, value);
    }

    /// @dev Returns all of the values in the set.
    /// Note: This can consume more gas than the block gas limit for large sets.
    function values(AddressSet storage set) internal view returns (address[] memory result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            let zs := _ZERO_SENTINEL
            let rootPacked := sload(rootSlot)
            let n := shr(160, shl(160, rootPacked))
            result := mload(0x40)
            let o := add(0x20, result)
            let v := shr(96, rootPacked)
            mstore(o, mul(v, iszero(eq(v, zs))))
            for {} 1 {} {
                if iszero(n) {
                    if v {
                        n := 1
                        v := shr(96, sload(add(rootSlot, n)))
                        if v {
                            n := 2
                            mstore(add(o, 0x20), mul(v, iszero(eq(v, zs))))
                            v := shr(96, sload(add(rootSlot, n)))
                            if v {
                                n := 3
                                mstore(add(o, 0x40), mul(v, iszero(eq(v, zs))))
                            }
                        }
                    }
                    break
                }
                n := shr(1, n)
                for { let i := 1 } lt(i, n) { i := add(i, 1) } {
                    v := shr(96, sload(add(rootSlot, i)))
                    mstore(add(o, shl(5, i)), mul(v, iszero(eq(v, zs))))
                }
                break
            }
            mstore(result, n)
            mstore(0x40, add(o, shl(5, n)))
        }
    }

    /// @dev Returns all of the values in the set.
    /// Note: This can consume more gas than the block gas limit for large sets.
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            let zs := _ZERO_SENTINEL
            let n := sload(not(rootSlot))
            result := mload(0x40)
            let o := add(0x20, result)
            for {} 1 {} {
                if iszero(n) {
                    let v := sload(rootSlot)
                    if v {
                        n := 1
                        mstore(o, mul(v, iszero(eq(v, zs))))
                        v := sload(add(rootSlot, n))
                        if v {
                            n := 2
                            mstore(add(o, 0x20), mul(v, iszero(eq(v, zs))))
                            v := sload(add(rootSlot, n))
                            if v {
                                n := 3
                                mstore(add(o, 0x40), mul(v, iszero(eq(v, zs))))
                            }
                        }
                    }
                    break
                }
                n := shr(1, n)
                for { let i := 0 } lt(i, n) { i := add(i, 1) } {
                    let v := sload(add(rootSlot, i))
                    mstore(add(o, shl(5, i)), mul(v, iszero(eq(v, zs))))
                }
                break
            }
            mstore(result, n)
            mstore(0x40, add(o, shl(5, n)))
        }
    }

    /// @dev Returns all of the values in the set.
    /// Note: This can consume more gas than the block gas limit for large sets.
    function values(Uint256Set storage set) internal view returns (uint256[] memory result) {
        result = _toUints(values(_toBytes32Set(set)));
    }

    /// @dev Returns all of the values in the set.
    /// Note: This can consume more gas than the block gas limit for large sets.
    function values(Int256Set storage set) internal view returns (int256[] memory result) {
        result = _toInts(values(_toBytes32Set(set)));
    }

    /// @dev Returns all of the values in the set.
    function values(Uint8Set storage set) internal view returns (uint8[] memory result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := mload(0x40)
            let ptr := add(result, 0x20)
            let o := 0
            for { let packed := sload(set.slot) } packed {} {
                if iszero(and(packed, 0xffff)) {
                    o := add(o, 16)
                    packed := shr(16, packed)
                    continue
                }
                mstore(ptr, o)
                ptr := add(ptr, shl(5, and(packed, 1)))
                o := add(o, 1)
                packed := shr(1, packed)
            }
            mstore(result, shr(5, sub(ptr, add(result, 0x20))))
            mstore(0x40, ptr)
        }
    }

    /// @dev Returns the element at index `i` in the set. Reverts if `i` is out-of-bounds.
    function at(AddressSet storage set, uint256 i) internal view returns (address result) {
        bytes32 rootSlot = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            result := shr(96, sload(add(rootSlot, i)))
            result := mul(result, iszero(eq(result, _ZERO_SENTINEL)))
        }
        if (i >= length(set)) revert IndexOutOfBounds();
    }

    /// @dev Returns the element at index `i` in the set. Reverts if `i` is out-of-bounds.
    function at(Bytes32Set storage set, uint256 i) internal view returns (bytes32 result) {
        result = _rootSlot(set);
        /// @solidity memory-safe-assembly
        assembly {
            result := sload(add(result, i))
            result := mul(result, iszero(eq(result, _ZERO_SENTINEL)))
        }
        if (i >= length(set)) revert IndexOutOfBounds();
    }

    /// @dev Returns the element at index `i` in the set. Reverts if `i` is out-of-bounds.
    function at(Uint256Set storage set, uint256 i) internal view returns (uint256 result) {
        result = uint256(at(_toBytes32Set(set), i));
    }

    /// @dev Returns the element at index `i` in the set. Reverts if `i` is out-of-bounds.
    function at(Int256Set storage set, uint256 i) internal view returns (int256 result) {
        result = int256(uint256(at(_toBytes32Set(set), i)));
    }

    /// @dev Returns the element at index `i` in the set. Reverts if `i` is out-of-bounds.
    function at(Uint8Set storage set, uint256 i) internal view returns (uint8 result) {
        /// @solidity memory-safe-assembly
        assembly {
            let packed := sload(set.slot)
            for {} 1 {
                mstore(0x00, 0x4e23d035) // `IndexOutOfBounds()`.
                revert(0x1c, 0x04)
            } {
                if iszero(lt(i, 256)) { continue }
                for { let j := 0 } iszero(eq(i, j)) {} {
                    packed := xor(packed, and(packed, add(1, not(packed))))
                    j := add(j, 1)
                }
                if iszero(packed) { continue }
                break
            }
            // Find first set subroutine, optimized for smaller bytecode size.
            let x := and(packed, add(1, not(packed)))
            let r := shl(7, iszero(iszero(shr(128, x))))
            r := or(r, shl(6, iszero(iszero(shr(64, shr(r, x))))))
            r := or(r, shl(5, lt(0xffffffff, shr(r, x))))
            // For the lower 5 bits of the result, use a De Bruijn lookup.
            // forgefmt: disable-next-item
            result := or(r, byte(and(div(0xd76453e0, shr(r, x)), 0x1f),
                0x001f0d1e100c1d070f090b19131c1706010e11080a1a141802121b1503160405))
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      PRIVATE HELPERS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the root slot.
    function _rootSlot(AddressSet storage s) private pure returns (bytes32 r) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x04, _ENUMERABLE_ADDRESS_SET_SLOT_SEED)
            mstore(0x00, s.slot)
            r := keccak256(0x00, 0x24)
        }
    }

    /// @dev Returns the root slot.
    function _rootSlot(Bytes32Set storage s) private pure returns (bytes32 r) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x04, _ENUMERABLE_WORD_SET_SLOT_SEED)
            mstore(0x00, s.slot)
            r := keccak256(0x00, 0x24)
        }
    }

    /// @dev Casts to a Bytes32Set.
    function _toBytes32Set(Uint256Set storage s) private pure returns (Bytes32Set storage c) {
        /// @solidity memory-safe-assembly
        assembly {
            c.slot := s.slot
        }
    }

    /// @dev Casts to a Bytes32Set.
    function _toBytes32Set(Int256Set storage s) private pure returns (Bytes32Set storage c) {
        /// @solidity memory-safe-assembly
        assembly {
            c.slot := s.slot
        }
    }

    /// @dev Casts to a uint256 array.
    function _toUints(bytes32[] memory a) private pure returns (uint256[] memory c) {
        /// @solidity memory-safe-assembly
        assembly {
            c := a
        }
    }

    /// @dev Casts to a int256 array.
    function _toInts(bytes32[] memory a) private pure returns (int256[] memory c) {
        /// @solidity memory-safe-assembly
        assembly {
            c := a
        }
    }
}
BeaconFactory.sol 121 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import { BeaconProxy } from "@openzeppelin/contracts/proxy/beacon/BeaconProxy.sol";
import { UpgradeableBeacon } from "@openzeppelin/contracts/proxy/beacon/UpgradeableBeacon.sol";
import { CREATE3 } from "solady/utils/CREATE3.sol";

import { IRoleRegistry } from "../interfaces/IRoleRegistry.sol";
import { UpgradeableProxy } from "../utils/UpgradeableProxy.sol";

/**
 * @title BeaconFactory
 * @author ether.fi
 * @notice Factory contract for deploying beacon proxies with deterministic addresses
 * @dev This contract uses CREATE3 for deterministic deployments and implements UUPS upgradeability pattern
 */
contract BeaconFactory is UpgradeableProxy {
    /// @custom:storage-location erc7201:etherfi.storage.BeaconFactory
    struct BeaconFactoryStorage {
        /// @notice The address of the beacon contract that stores the implementation
        address beacon;
    }

    // keccak256(abi.encode(uint256(keccak256("etherfi.storage.BeaconFactory")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant BeaconFactoryStorageLocation = 0x644210a929ca6ee03d33c1a1fe361b36b5a9728941782cd06b1139e4cae58200;

    /// @notice Emitted when the implementation in the beacon address is updated
    /// @param oldImpl The previous impl address
    /// @param newImpl The new impl address
    event BeaconImplemenationUpgraded(address oldImpl, address newImpl);

    /// @notice Emitted when a new beacon proxy is deployed
    /// @param salt The salt for deterministic deployment
    /// @param deployed The address of the newly deployed proxy
    event BeaconProxyDeployed(bytes32 salt, address indexed deployed);

    /// @notice Thrown when the deployed address doesn't match the predicted address
    error DeployedAddressDifferentFromExpected();

    /// @notice Thrown when input is invalid
    error InvalidInput();

    /// @notice Thrown when initialize fails on the deployed contract
    error InitializationFailed();

    /**
     * @dev Initializes the contract with required parameters
     * @param _roleRegistry Address of the role registry contract
     * @param _beaconImpl Address of the initial implementation contract
     */
    function __BeaconFactory_initialize(address _roleRegistry, address _beaconImpl) internal onlyInitializing {
        __UpgradeableProxy_init(_roleRegistry);
        __Pausable_init();
        BeaconFactoryStorage storage $ = _getBeaconFactoryStorage();
        $.beacon = address(new UpgradeableBeacon(_beaconImpl, address(this)));
    }

    /**
     * @dev Returns the storage struct from the specified storage slot
     * @return $ Reference to the BeaconFactoryStorage struct
     */
    function _getBeaconFactoryStorage() private pure returns (BeaconFactoryStorage storage $) {
        assembly {
            $.slot := BeaconFactoryStorageLocation
        }
    }

    /**
     * @dev Deploys a new beacon proxy with deterministic address
     * @param salt The salt value used for deterministic deployment
     * @param initData The initialization data for the proxy
     * @return The address of the deployed proxy
     * @custom:restriction Caller must have access control restrictions
     */
    function _deployBeacon(bytes32 salt, bytes memory initData) internal returns (address) {
        address expectedAddr = getDeterministicAddress(salt);
        address deployedAddr = address(CREATE3.deployDeterministic(abi.encodePacked(type(BeaconProxy).creationCode, abi.encode(beacon(), "")), salt));
        if (initData.length > 0) {
            (bool success, ) = deployedAddr.call(initData);
            if (!success) revert InitializationFailed();
        }
        if (expectedAddr != deployedAddr) revert DeployedAddressDifferentFromExpected();

        emit BeaconProxyDeployed(salt, deployedAddr);
        return deployedAddr;
    }

    /**
     * @notice Returns the address of the beacon which stores the implementation
     * @return beacon Address of the beacon contract
     */
    function beacon() public view returns (address) {
        BeaconFactoryStorage storage $ = _getBeaconFactoryStorage();
        return $.beacon;
    }

    /**
     * @notice Function to set the new implementation in the beacon contract
     * @dev Only callable by owner of RoleRegistry
     * @param _newImpl New implementation for the beacon contract
     * @custom:throws OnlyRoleRegistryOwner when msg.sender is not the owner of the RoleRegistry contract
     * @custom:throws InvalidInput when _beacon == address(0)
     */
    function upgradeBeaconImplementation(address _newImpl) external onlyRoleRegistryOwner() {
        if (_newImpl == address(0)) revert InvalidInput();

        UpgradeableBeacon upgradeableBeacon = UpgradeableBeacon(_getBeaconFactoryStorage().beacon);
        emit BeaconImplemenationUpgraded(upgradeableBeacon.implementation(), _newImpl);
        upgradeableBeacon.upgradeTo(_newImpl);
    }


    /**
     * @notice Predicts the deterministic address for a given salt
     * @param salt The salt value used for address prediction
     * @return The predicted deployment address
     */
    function getDeterministicAddress(bytes32 salt) public view returns (address) {
        return CREATE3.predictDeterministicAddress(salt);
    }
}
IRoleRegistry.sol 124 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title IRoleRegistry
 * @notice Interface for role-based access control management
 * @dev Provides functions for managing and querying role assignments
 */
interface IRoleRegistry {
    /**
     * @notice Verifies if an account has pauser privileges
     * @param account The address to check for pauser role
     * @custom:throws Reverts if account is not an authorized pauser
     */
    function onlyPauser(address account) external view;

    /**
     * @notice Verifies if an account has unpauser privileges
     * @param account The address to check for unpauser role
     * @custom:throws Reverts if account is not an authorized unpauser
     */
    function onlyUnpauser(address account) external view;

    /**
     * @notice Checks if an account has any of the specified roles
     * @dev Reverts if the account doesn't have at least one of the roles
     * @param account The address to check roles for
     * @param encodedRoles ABI encoded roles using abi.encode(ROLE_1, ROLE_2, ...)
     * @custom:throws Reverts if account has none of the specified roles
     */
    function checkRoles(address account, bytes memory encodedRoles) external view;

    /**
     * @notice Checks if an account has a specific role
     * @dev Direct query for a single role status
     * @param role The role identifier to check
     * @param account The address to check the role for
     * @return True if the account has the role, false otherwise
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @notice Grants a role to an account
     * @dev Only callable by the contract owner
     * @param role The role identifier to grant
     * @param account The address to grant the role to
     * @custom:access Restricted to contract owner
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @notice Revokes a role from an account
     * @dev Only callable by the contract owner
     * @param role The role identifier to revoke
     * @param account The address to revoke the role from
     * @custom:access Restricted to contract owner
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @notice Retrieves all addresses that have a specific role
     * @dev Wrapper around EnumerableRoles roleHolders function
     * @param role The role identifier to query
     * @return Array of addresses that have the specified role
     */
    function roleHolders(bytes32 role) external view returns (address[] memory);

    /**
     * @notice Verifies if an account has upgrader privileges
     * @dev Used for upgrade authorization checks
     * @param account The address to check for upgrader role
     * @custom:throws Reverts if account is not an authorized upgrader
     */
    function onlyUpgrader(address account) external view;

    /**
     * @notice Returns the owner of the contract
     * @return result Owner of the contract
     */
    function owner() external view returns (address result);

    /**
     * @notice Generates a unique role identifier for safe administrators
     * @dev Creates a unique bytes32 identifier by hashing the safe address with a role type
     * @param safe The address of the safe for which to generate the admin role
     * @return bytes32 A unique role identifier for the specified safe's admins
     * @custom:throws InvalidInput if safe is a zero address
     */
    function getSafeAdminRole(address safe) external pure returns (bytes32);

    /**
     * @notice Configures admin roles for a specific safe
     * @dev Grants/revokes admin privileges to specified addresses for a particular safe
     * @param accounts Array of admin addresses to configure
     * @param shouldAdd Array indicating whether to add or remove each admin
     * @custom:throws OnlyEtherFiSafe if called by any address other than a registered EtherFiSafe
     * @custom:throws InvalidInput if the admins array is empty or contains a zero address
     * @custom:throws ArrayLengthMismatch if the array lengths mismatch
     */
    function configureSafeAdmins(address[] calldata accounts, bool[] calldata shouldAdd) external;

    /**
     * @notice Verifies if an account has safe admin privileges
     * @param safe The address of the safe
     * @param account The address to check for safe admin role
     * @custom:throws OnlySafeAdmin if the account does not have the SafeAdmin role
     */
    function onlySafeAdmin(address safe, address account) external view;

    /**
     * @notice Returns if an account has safe admin privileges
     * @param safe The address of the safe
     * @param account The address to check for safe admin role
     * @return bool suggesting if the account has the safe admin role
     */
    function isSafeAdmin(address safe, address account) external view returns (bool);

    /**
     * @notice Retrieves all addresses that have the safe admin role for a particular safe
     * @param safe The address of the safe
     * @return Array of addresses that have the safe admin role
     */
    function getSafeAdmins(address safe) external view returns (address[] memory);
}
DelegateCallLib.sol 43 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title DelegateCallLib
 * @notice Library for delegatecall operations
 * @author ether.fi
 */
library DelegateCallLib {
    /**
     * @notice Performs a delegate call to the target contract
     * @dev Internal function used for bridge adapter calls
     * @param target The address of the contract to delegate call to
     * @param data The calldata to execute
     * @return result The returned data from the delegate call
     */
    function delegateCall(address target, bytes memory data) internal returns (bytes memory result) {
        require(target != address(this), "delegatecall to self");

        // solhint-disable-next-line no-inline-assembly
        assembly ("memory-safe") {
            // Perform delegatecall to the target contract
            let success := delegatecall(gas(), target, add(data, 0x20), mload(data), 0, 0)

            // Get the size of the returned data
            let size := returndatasize()

            // Allocate memory for the return data
            result := mload(0x40)

            // Set the length of the return data
            mstore(result, size)

            // Copy the return data to the allocated memory
            returndatacopy(add(result, 0x20), 0, size)

            // Update the free memory pointer
            mstore(0x40, add(result, add(0x20, size)))

            if iszero(success) { revert(result, returndatasize()) }
        }
    }
}
TopUp.sol 70 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Ownable } from "solady/auth/Ownable.sol";

import { Constants } from "../utils/Constants.sol";

/**
 * @title TopUp
 * @notice A contract that allows the owner to withdraw both ETH and ERC20 tokens
 * @dev Inherits from Constants for ETH address constant and Solady's Ownable for access control
 * @author ether.fi
 */
contract TopUp is Constants, Ownable {
    using SafeERC20 for IERC20;

    /// @notice Error thrown when non-owner tries to access owner-only functions
    error OnlyOwner();
    /// @notice Error thrown when ETH transfer fails
    error EthTransferFailed();

    constructor() {
        // initialize with dead so the impl ownership cannot be taken over by someone
        _initializeOwner(address(0xdead));
    }

    /**
     * @notice Initializes the contract with an owner
     * @dev Can only be called once, sets initial owner
     * @param _owner Address that will be granted ownership of the contract
     * @custom:throws AlreadyInitialized if already initialized
     */
    function initialize(address _owner) external {
        if (owner() != address(0)) revert AlreadyInitialized();
        _initializeOwner(_owner);
    }

    /**
     * @notice Allows owner to withdraw multiple tokens including ETH
     * @dev Handles both ETH (using ETH constant) and ERC20 tokens
     * @param tokens Array of token addresses (use ETH constant for ETH)
     * @custom:security Uses a gas limit of 10_000 for ETH transfers to prevent reentrancy
     * @custom:throws OnlyOwner if caller is not the owner
     * @custom:throws EthTransferFailed if ETH transfer fails
     */
    function processTopUp(address[] calldata tokens) external {
        address _owner = owner();
        if (_owner != msg.sender) revert OnlyOwner();

        uint256 len = tokens.length;

        for (uint256 i = 0; i < len;) {
            uint256 balance;
            if (tokens[i] == ETH) {
                balance = address(this).balance;
                if (balance > 0) {
                    (bool success,) = _owner.call{ value: balance, gas: 10_000 }("");
                    if (!success) revert EthTransferFailed();
                }
            } else {
                balance = IERC20(tokens[i]).balanceOf(address(this));
                if (balance > 0) IERC20(tokens[i]).safeTransfer(_owner, balance);
            }
            unchecked {
                ++i;
            }
        }
    }
}
TopUpFactory.sol 373 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { EnumerableSetLib } from "solady/utils/EnumerableSetLib.sol";

import { BeaconFactory, UpgradeableBeacon } from "../beacon-factory/BeaconFactory.sol";
import { DelegateCallLib } from "../libraries/DelegateCallLib.sol";
import { TopUp, Constants } from "./TopUp.sol";
import { BridgeAdapterBase } from "./bridge/BridgeAdapterBase.sol";

/**
 * @title TopUpFactory
 * @notice Factory contract for deploying TopUp instances using the beacon proxy pattern
 * @dev Extends BeaconFactory to provide Beacon Proxy deployment functionality
 * @author ether.fi
 */
contract TopUpFactory is BeaconFactory, Constants {
    using EnumerableSetLib for EnumerableSetLib.AddressSet;
    using SafeERC20 for IERC20;

    /**
     * @dev Configuration parameters for supported tokens and their bridge settings
     * @param bridgeAdapter Address of the bridge adapter contract for this token
     * @param recipientOnDestChain Address that will receive tokens on the destination chain
     * @param maxSlippageInBps Maximum allowed slippage in basis points (1 bps = 0.01%)
     * @param additionalData Additional data specific to the bridge adapter
     */
    struct TokenConfig {
        address bridgeAdapter;
        address recipientOnDestChain;
        uint96 maxSlippageInBps;
        bytes additionalData;
    }

    /// @custom:storage-location erc7201:etherfi.storage.TopUpFactory
    struct TopUpFactoryStorage {
        /// @notice Set containing addresses of all deployed TopUp instances
        EnumerableSetLib.AddressSet deployedAddresses;
        /// @notice Mapping of token addresses to their bridge configuration
        mapping(address token => TokenConfig config) tokenConfig;
        /// @notice Address of the wallet used for emergency fund recovery
        address recoveryWallet;
    }

    // keccak256(abi.encode(uint256(keccak256("etherfi.storage.TopUpFactory")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant TopUpFactoryStorageLocation = 0xe4e747da44afe6bc45062fa78d7d038abc167c5a78dee3046108b9cc47b1b100;

    /// @notice The ADMIN role for the TopUp factory
    bytes32 public constant TOPUP_FACTORY_ADMIN_ROLE = keccak256("TOPUP_FACTORY_ADMIN_ROLE");

    /// @notice Max slippage allowed for bridging
    uint96 public constant MAX_ALLOWED_SLIPPAGE = 200; // 2%

    /// @notice Emitted when tokens are bridged to the destination chain
    /// @param token The address of the token being bridged
    /// @param amount The amount of tokens being bridged
    event Bridge(address indexed token, uint256 amount);

    /// @notice Emitted when funds are recovered to the recovery wallet
    /// @param recoveryWallet The address receiving the recovered funds
    /// @param token The token being recovered
    /// @param amount The amount of tokens recovered
    event Recovery(address recoveryWallet, address indexed token, uint256 amount);

    /// @notice Emitted when the recovery wallet address is updated
    /// @param oldRecoveryWallet The previous recovery wallet address
    /// @param newRecoveryWallet The new recovery wallet address
    event RecoveryWalletSet(address oldRecoveryWallet, address newRecoveryWallet);

    /// @notice Emitted when the tokens are configured
    /// @param tokens Array of token addresses
    /// @param config Array of TokenConfig struct
    event TokenConfigSet(address[] tokens, TokenConfig[] config);

    /// @notice Error thrown when a non-admin tries to deploy a topUp contract
    error OnlyAdmin();
    /// @notice Error thrown when trying to pull funds from an address not registered as deployedAddresses
    error InvalidTopUpAddress();
    /// @notice Error thrown when zero address is provided for a token
    error TokenCannotBeZeroAddress();
    /// @notice Error thrown when attempting to bridge a token without configuration
    error TokenConfigNotSet();
    /// @notice Error thrown when attempting to bridge with zero balance
    error ZeroBalance();
    /// @notice Error thrown when recovery wallet is not set
    error RecoveryWalletNotSet();
    /// @notice Error thrown when attempting to set zero address as recovery wallet
    error RecoveryWalletCannotBeZeroAddress();
    /// @notice Error thrown when attempting to recover token which is a supported asset
    error OnlyUnsupportedTokens();
    /// @notice Error thrown when array lengths mismatch
    error ArrayLengthMismatch();
    /// @notice Error thrown when the start index is invalid
    error InvalidStartIndex();
    /// @notice Error thrown when the token config passed is invalid
    error InvalidConfig();

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    /**
     * @notice Initializes the TopUpFactory contract
     * @dev Sets up the role registry, admin, and beacon implementation
     * @param _roleRegistry Address of the role registry contract
     * @param _topUpImpl Address of the topUp implementation contract
     */
    function initialize(address _roleRegistry, address _topUpImpl) external initializer {
        __BeaconFactory_initialize(_roleRegistry, _topUpImpl);
    }

    /**
     * @notice Deploys a new TopUp contract instance
     * @dev Only callable by addresses with TOPUP_FACTORY_ADMIN_ROLE
     * @param salt The salt value used for deterministic deployment
     * @custom:throws OnlyAdmin if caller doesn't have admin role
     */
    function deployTopUpContract(bytes32 salt) external whenNotPaused {
        if (!roleRegistry().hasRole(TOPUP_FACTORY_ADMIN_ROLE, msg.sender)) revert OnlyAdmin();
        bytes memory initData = abi.encodeWithSelector(TopUp.initialize.selector, address(this));
        address deployed = _deployBeacon(salt, initData);

        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        $.deployedAddresses.add(deployed);
    }

    /**
     * @notice Processes specified tokens from a range of deployed topUp contracts
     * @dev Iterates through deployed topUp contracts starting at index 'start' and calls processTopUp on each
     * @param tokens Array of token addresses to process
     * @param start Starting index in the deployedAddresses array
     * @param n Number of topUp contracts to process
     * @custom:throws If start + n exceeds the number of deployed topUp contracts
     * @custom:throws If any topUp's processTopUp call fails
     */
    function processTopUp(address[] calldata tokens, uint256 start, uint256 n) external {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();

        uint256 length = $.deployedAddresses.length();
        if (start >= length) revert InvalidStartIndex();
        if (start + n > length) n = length - start;

        for (uint256 i = 0; i < n;) {
            TopUp($.deployedAddresses.at(start + i)).processTopUp(tokens);
            unchecked {
                ++i;
            }
        }
    }

    /**
     * @notice Processes specified tokens from a given topUp contract
     * @dev Verifies the topUp contract is valid before attempting to pull funds
     * @param tokens Array of token addresses to process
     * @param topUpContracts Array of addresses of the topUp contracts to process
     * @custom:throws InvalidTopUpAddress if the TopUp address is not a deployed TopUp contract
     * @custom:throws If the TopUp contracts's processTopUp call fails
     */
    function processTopUpFromContracts(address[] calldata tokens, address[] calldata topUpContracts) external {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        uint256 addrLength = topUpContracts.length;

        for (uint256 i = 0; i < addrLength;) {
            if (!$.deployedAddresses.contains(topUpContracts[i])) revert InvalidTopUpAddress();
            TopUp(topUpContracts[i]).processTopUp(tokens);
            unchecked {
                ++i;
            }
        }
    }

    /**
     * @notice Sets configuration parameters for multiple tokens
     * @dev Allows admin to configure bridge settings for multiple tokens in a single transaction
     * @param tokens Array of token addresses to configure
     * @param configs Array of TokenConfig structs containing bridge settings for each token
     * @custom:throws ArrayLengthMismatch if tokens and configs arrays have different lengths
     * @custom:throws TokenCannotBeZeroAddress if any token address is zero
     * @custom:throws InvalidConfig if any config has invalid parameters:
     *   - bridgeAdapter is zero address
     *   - recipientOnDestChain is zero address
     *   - maxSlippageInBps exceeds MAX_ALLOWED_SLIPPAGE
     * @custom:emits TokenConfigSet when configs are updated
     */
    function setTokenConfig(address[] calldata tokens, TokenConfig[] calldata configs) external onlyRoleRegistryOwner {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        uint256 len = tokens.length;
        if (len != configs.length) revert ArrayLengthMismatch();

        for (uint256 i = 0; i < len;) {
            if (tokens[i] == address(0)) revert TokenCannotBeZeroAddress();
            if (configs[i].bridgeAdapter == address(0) || configs[i].recipientOnDestChain == address(0) || configs[i].maxSlippageInBps > MAX_ALLOWED_SLIPPAGE) revert InvalidConfig();

            $.tokenConfig[tokens[i]] = configs[i];
            unchecked {
                ++i;
            }
        }

        emit TokenConfigSet(tokens, configs);
    }

    /**
     * @notice Bridges tokens to the destination chain using the configured bridge adapter
     * @dev Uses delegate call to execute the bridge operation through the appropriate adapter
     * @param token The address of the token to bridge
     * @custom:throws TokenCannotBeZeroAddress if token address is zero
     * @custom:throws TokenConfigNotSet if bridge configuration is not set for the token
     * @custom:throws ZeroBalance if contract has no balance of the specified token
     */
    function bridge(address token) external payable whenNotPaused {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();

        if (token == address(0)) revert TokenCannotBeZeroAddress();
        if ($.tokenConfig[token].bridgeAdapter == address(0)) revert TokenConfigNotSet();

        // leaving behind 0.01 ether for bridge fee if any
        uint256 balance = token == ETH ? address(this).balance - 0.01 ether : IERC20(token).balanceOf(address(this));
        if (balance == 0) revert ZeroBalance();

        DelegateCallLib.delegateCall($.tokenConfig[token].bridgeAdapter, abi.encodeWithSelector(BridgeAdapterBase.bridge.selector, token, balance, $.tokenConfig[token].recipientOnDestChain, $.tokenConfig[token].maxSlippageInBps, $.tokenConfig[token].additionalData));

        emit Bridge(token, balance);
    }

    /**
     * @notice Recovers ERC20 tokens to the designated recovery wallet
     * @dev Only callable by admin role
     * @param token The address of the token to recover
     * @param amount The amount of tokens to recover
     * @custom:throws OnlyAdmin if caller doesn't have admin role
     * @custom:throws TokenCannotBeZeroAddress if token address is zero
     * @custom:throws OnlyUnsupportedTokens if token is a supported bridge asset
     * @custom:throws RecoveryWalletNotSet if recovery wallet is not configured
     */
    function recoverFunds(address token, uint256 amount) external onlyRoleRegistryOwner {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();

        if (token == address(0)) revert TokenCannotBeZeroAddress();
        if ($.tokenConfig[token].bridgeAdapter != address(0)) revert OnlyUnsupportedTokens();
        if ($.recoveryWallet == address(0)) revert RecoveryWalletNotSet();

        IERC20(token).safeTransfer($.recoveryWallet, amount);

        emit Recovery($.recoveryWallet, token, amount);
    }

    /**
     * @notice Sets the recovery wallet address for emergency fund recovery
     * @dev Only callable by admin role
     * @param _recoveryWallet The new recovery wallet address
     * @custom:throws OnlyAdmin if caller doesn't have admin role
     * @custom:throws RecoveryWalletCannotBeZeroAddress if provided address is zero
     */
    function setRecoveryWallet(address _recoveryWallet) external onlyRoleRegistryOwner {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();

        if (_recoveryWallet == address(0)) revert RecoveryWalletCannotBeZeroAddress();
        emit RecoveryWalletSet($.recoveryWallet, _recoveryWallet);
        $.recoveryWallet = _recoveryWallet;
    }

    receive() external payable { }

    /**
     * @notice Gets the bridge fee for a token transfer
     * @dev Queries the bridge adapter for the fee estimation
     * @param token The address of the token to bridge
     * @return _token The fee token address
     * @return _amount The fee amount in the _token's decimals
     * @custom:throws TokenCannotBeZeroAddress if token address is zero
     * @custom:throws TokenConfigNotSet if bridge configuration is not set for the token
     * @custom:throws ZeroBalance if contract has no balance of the specified token
     */
    function getBridgeFee(address token) external view returns (address _token, uint256 _amount) {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();

        if (token == address(0)) revert TokenCannotBeZeroAddress();
        if ($.tokenConfig[token].bridgeAdapter == address(0)) revert TokenConfigNotSet();

        uint256 balance = token == ETH ? address(this).balance : IERC20(token).balanceOf(address(this));
        if (balance == 0) revert ZeroBalance();

        return BridgeAdapterBase($.tokenConfig[token].bridgeAdapter).getBridgeFee(token, balance, $.tokenConfig[token].recipientOnDestChain, $.tokenConfig[token].maxSlippageInBps, $.tokenConfig[token].additionalData);
    }

    /**
     * @notice Gets deployed TopUp contract addresses
     * @dev Returns an array of TopUp contracts deployed by this factory
     * @param start Starting index in the deployedAddresses array
     * @param n Number of topUp contracts to get
     * @return An array of deployed TopUp contract addresses
     * @custom:throws InvalidStartIndex if start index is invalid
     */
    function getDeployedAddresses(uint256 start, uint256 n) external view returns (address[] memory) {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        uint256 length = $.deployedAddresses.length();
        if (start >= length) revert InvalidStartIndex();
        if (start + n > length) n = length - start;
        address[] memory addresses = new address[](n);

        for (uint256 i = 0; i < n;) {
            addresses[i] = $.deployedAddresses.at(start + i);
            unchecked {
                ++i;
            }
        }
        return addresses;
    }

    /**
     * @notice Gets the number of contracts deployed
     * @return Number of contracts deployed
     */
    function numContractsDeployed() external view returns (uint256) {
        return _getTopUpFactoryStorage().deployedAddresses.length();
    }

    /**
     * @notice Gets the bridge configuration for a specific token
     * @dev Returns the TokenConfig struct containing bridge settings
     * @param token The address of the token to query
     * @return Configuration parameters for the specified token
     */
    function getTokenConfig(address token) external view returns (TokenConfig memory) {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        return $.tokenConfig[token];
    }

    /**
     * @notice Gets the current recovery wallet address
     * @dev Returns the address where funds can be recovered to
     * @return The configured recovery wallet address
     */
    function getRecoveryWallet() external view returns (address) {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        return $.recoveryWallet;
    }

    /**
     * @notice Checks if a given token is supported for bridging
     * @dev Returns whether the token is in the supported tokens set
     * @param token The address of the token to check
     * @return True if the token is supported, false otherwise
     */
    function isTokenSupported(address token) external view returns (bool) {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        return $.tokenConfig[token].bridgeAdapter != address(0);
    }

    /**
     * @notice Checks if an address is a deployed TopUp contract
     * @dev Returns whether the address is in the deployed addresses set
     * @param topUpContract The address to check
     * @return True if the address is a deployed TopUp contract, false otherwise
     */
    function isTopUpContract(address topUpContract) external view returns (bool) {
        TopUpFactoryStorage storage $ = _getTopUpFactoryStorage();
        return $.deployedAddresses.contains(topUpContract);
    }

    /**
     * @dev Returns the storage struct for TopUpFactory
     * @return $ Reference to the TopUpFactoryStorage struct
     */
    function _getTopUpFactoryStorage() internal pure returns (TopUpFactoryStorage storage $) {
        assembly {
            $.slot := TopUpFactoryStorageLocation
        }
    }
}
BridgeAdapterBase.sol 56 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import { Math } from "@openzeppelin/contracts/utils/math/Math.sol";

import {Constants} from "../../utils/Constants.sol";

/**
 * @title BridgeAdapterBase
 * @notice Base contract for bridge adapter implementations
 * @dev Abstract contract providing common bridge adapter functionality
 * @author ether.fi
 */
abstract contract BridgeAdapterBase is Constants {
    using Math for uint256;

    /// @notice Error thrown when provided native token fee is insufficient
    error InsufficientNativeFee();

    /// @notice Error thrown when received amount is less than minimum required
    error InsufficientMinAmount();

    /**
     * @notice Calculates the minimum amount after applying slippage
     * @dev Uses basis points for slippage calculation (100% = 10000 bps)
     * @param amount The original amount
     * @param slippage The maximum allowed slippage in basis points
     * @return The minimum amount after slippage deduction
     */
    function deductSlippage(uint256 amount, uint256 slippage) internal pure returns (uint256) {
        return amount.mulDiv(10_000 - slippage, 10_000);
    }

    /**
     * @notice Bridges tokens to the destination chain
     * @dev Must be implemented by specific bridge adapters
     * @param token The address of the token to bridge
     * @param amount The amount of tokens to bridge
     * @param destRecipient The recipient address on the destination chain
     * @param maxSlippage Maximum allowed slippage in basis points
     * @param additionalData Bridge-specific data required for the operation
     */
    function bridge(address token, uint256 amount, address destRecipient, uint256 maxSlippage, bytes calldata additionalData) external payable virtual;

    /**
     * @notice Calculates the fee required for bridging
     * @dev Must be implemented by specific bridge adapters
     * @param token The address of the token to bridge
     * @param amount The amount of tokens to bridge
     * @param destRecipient The recipient address on the destination chain
     * @param maxSlippage Maximum allowed slippage in basis points
     * @param additionalData Bridge-specific data required for the calculation
     * @return Token address and amount of the required fee
     */
    function getBridgeFee(address token, uint256 amount, address destRecipient, uint256 maxSlippage, bytes calldata additionalData) external view virtual returns (address, uint256);
}
Constants.sol 16 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title Constants
 * @author ether.fi
 * @notice Contract that defines commonly used constants across the ether.fi protocol
 * @dev This contract is not meant to be deployed but to be inherited by other contracts
 */
contract Constants {
    /**
     * @notice Special address used to represent native ETH in the protocol
     * @dev This address is used as a marker since ETH is not an ERC20 token
     */
    address public constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
}
UpgradeableProxy.sol 119 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import { UUPSUpgradeable } from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import { PausableUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import { ReentrancyGuardTransientUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardTransientUpgradeable.sol";

import { IRoleRegistry } from "../interfaces/IRoleRegistry.sol";

/**
 * @title UpgradeableProxy
 * @author ether.fi
 * @notice An UpgradeableProxy contract which can be upgraded by RoleRegistry contract
 */
contract UpgradeableProxy is UUPSUpgradeable, PausableUpgradeable, ReentrancyGuardTransientUpgradeable {
    /// @custom:storage-location erc7201:etherfi.storage.UpgradeableProxy
    struct UpgradeableProxyStorage {
        /// @notice Reference to the role registry contract for access control
        IRoleRegistry roleRegistry;
    }

    // keccak256(abi.encode(uint256(keccak256("etherfi.storage.UpgradeableProxy")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant UpgradeableProxyStorageLocation = 0xa5586bb7fe6c4d1a576fc53fefe6d5915940638d338769f6905020734977f500;

    /// @notice Error thrown when caller is unauthorized to perform an operation
    error Unauthorized();

    /// @notice Error thrown when caller is not the role registry owner
    error OnlyRoleRegistryOwner();


    /**
     * @notice Returns the address of the Role Registry contract
     * @return roleRegistry Reference to the role registry contract
     */
    function roleRegistry() public view returns (IRoleRegistry) {
        UpgradeableProxyStorage storage $ = _getUpgradeableProxyStorage();
        return $.roleRegistry;
    }

    /**
     * @dev Initializes the contract with Role Registry
     * @param _roleRegistry Address of the role registry contract
     */
    function __UpgradeableProxy_init(address _roleRegistry) internal onlyInitializing {
        UpgradeableProxyStorage storage $ = _getUpgradeableProxyStorage();
        $.roleRegistry = IRoleRegistry(_roleRegistry);

        __ReentrancyGuardTransient_init();
        __Pausable_init_unchained();
    }

    /**
     * @dev Returns the storage struct from the specified storage slot
     * @return $ Reference to the UpgradeableProxyStorage struct
     */
    function _getUpgradeableProxyStorage() internal pure returns (UpgradeableProxyStorage storage $) {
        assembly {
            $.slot := UpgradeableProxyStorageLocation
        }
    }

    /**
     * @dev Updates the role registry contract address
     * @param _roleRegistry The address of the new role registry contract
     * @custom:security This is a critical function that updates access control
     */
    function _setRoleRegistry(address _roleRegistry) internal {
        UpgradeableProxyStorage storage $ = _getUpgradeableProxyStorage();
        $.roleRegistry = IRoleRegistry(_roleRegistry);
    }

    /**
     * @dev Ensures only authorized upgraders can upgrade the contract
     * @param newImplementation Address of the new implementation contract
     */
    function _authorizeUpgrade(address newImplementation) internal view override {
        UpgradeableProxyStorage storage $ = _getUpgradeableProxyStorage();
        $.roleRegistry.onlyUpgrader(msg.sender);

        // Silence compiler warning on unused variables.
        newImplementation = newImplementation;
    }

    /**
     * @notice Pauses the contract
     * @dev Only callable by accounts with the pauser role
     */
    function pause() external {
        roleRegistry().onlyPauser(msg.sender);
        _pause();
    }

    /**
     * @notice Unpauses the contract
     * @dev Only callable by accounts with the unpauser role
     */
    function unpause() external {
        roleRegistry().onlyUnpauser(msg.sender);
        _unpause();
    }

    /**
     * @dev Modifier to restrict access to specific roles
     * @param role Role identifier
     */
    modifier onlyRole(bytes32 role) {
        if (!roleRegistry().hasRole(role, msg.sender)) revert Unauthorized();
        _;
    }

    /**
     * @dev Modifier to restrict access to owner of the role registry
     */
    modifier onlyRoleRegistryOwner() {
        if (roleRegistry().owner() != msg.sender) revert OnlyRoleRegistryOwner();
        _;
    }
}

Read Contract

ETH 0x8322fff2 → address
MAX_ALLOWED_SLIPPAGE 0xb69fd599 → uint96
TOPUP_FACTORY_ADMIN_ROLE 0x933bcc6a → bytes32
UPGRADE_INTERFACE_VERSION 0xad3cb1cc → string
beacon 0x59659e90 → address
getBridgeFee 0x5417b02c → address, uint256
getDeployedAddresses 0x60db2873 → address[]
getDeterministicAddress 0xa58dcc95 → address
getRecoveryWallet 0x1becc420 → address
getTokenConfig 0xcb67e3b1 → tuple
isTokenSupported 0x75151b63 → bool
isTopUpContract 0xb0b15c11 → bool
numContractsDeployed 0x886e89a5 → uint256
paused 0x5c975abb → bool
proxiableUUID 0x52d1902d → bytes32
roleRegistry 0x08c73259 → address

Write Contract 12 functions

These functions modify contract state and require a wallet transaction to execute.

bridge 0x53ca57da
address token
deployTopUpContract 0x760d0f9d
bytes32 salt
initialize 0x485cc955
address _roleRegistry
address _topUpImpl
pause 0x8456cb59
No parameters
processTopUp 0xc93d2b1d
address[] tokens
uint256 start
uint256 n
processTopUpFromContracts 0x7b0eb57d
address[] tokens
address[] topUpContracts
recoverFunds 0x58609754
address token
uint256 amount
setRecoveryWallet 0xcd00c538
address _recoveryWallet
setTokenConfig 0xceed8d06
address[] tokens
tuple[] configs
unpause 0x3f4ba83a
No parameters
upgradeBeaconImplementation 0xde9d008d
address _newImpl
upgradeToAndCall 0x4f1ef286
address newImplementation
bytes data

Recent Transactions

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