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jordaniza/Flattened.sol

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Flattened version of DAO.sol using yarn hardhat flatten
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Flattened.sol
// Sources flattened with hardhat v2.22.3 https://hardhat.org
// SPDX-License-Identifier: AGPL-3.0-or-later AND MIT
// File @openzeppelin/contracts-upgradeable/interfaces/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
* @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
* proxy whose upgrades are fully controlled by the current implementation.
*/
interface IERC1822ProxiableUpgradeable {
/**
* @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);
}
// File @openzeppelin/contracts-upgradeable/interfaces/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)
pragma solidity ^0.8.0;
/**
* @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
*
* _Available since v4.8.3._
*/
interface IERC1967Upgradeable {
/**
* @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);
}
// File @openzeppelin/contracts-upgradeable/proxy/beacon/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeaconUpgradeable {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data
) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data
) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
/**
* @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 Indicates that the contract has been initialized.
* @custom:oz-retyped-from bool
*/
uint8 private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint8 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 functions marked with `initializer` can be nested in the context of a
* constructor.
*
* Emits an {Initialized} event.
*/
modifier initializer() {
bool isTopLevelCall = !_initializing;
require(
(isTopLevelCall && _initialized < 1) ||
(!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
"Initializable: contract is already initialized"
);
_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 255 will prevent any future reinitialization.
*
* Emits an {Initialized} event.
*/
modifier reinitializer(uint8 version) {
require(
!_initializing && _initialized < version,
"Initializable: contract is already initialized"
);
_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() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
/**
* @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 {
require(!_initializing, "Initializable: contract is initializing");
if (_initialized != type(uint8).max) {
_initialized = type(uint8).max;
emit Initialized(type(uint8).max);
}
}
/**
* @dev Returns the highest version that has been initialized. See {reinitializer}.
*/
function _getInitializedVersion() internal view returns (uint8) {
return _initialized;
}
/**
* @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
*/
function _isInitializing() internal view returns (bool) {
return _initializing;
}
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```solidity
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
* _Available since v4.9 for `string`, `bytes`._
*/
library StorageSlotUpgradeable {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
struct StringSlot {
string value;
}
struct BytesSlot {
bytes value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` with member `value` located at `slot`.
*/
function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` representation of the string storage pointer `store`.
*/
function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
/**
* @dev Returns an `BytesSlot` with member `value` located at `slot`.
*/
function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
*/
function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/ERC1967/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*/
abstract contract ERC1967UpgradeUpgradeable is Initializable, IERC1967Upgradeable {
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT =
0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT =
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
function __ERC1967Upgrade_init() internal onlyInitializing {}
function __ERC1967Upgrade_init_unchained() internal onlyInitializing {}
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(
AddressUpgradeable.isContract(newImplementation),
"ERC1967: new implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
AddressUpgradeable.functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallUUPS(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
// Upgrades from old implementations will perform a rollback test. This test requires the new
// implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
// this special case will break upgrade paths from old UUPS implementation to new ones.
if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
_setImplementation(newImplementation);
} else {
try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (
bytes32 slot
) {
require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
} catch {
revert("ERC1967Upgrade: new implementation is not UUPS");
}
_upgradeToAndCall(newImplementation, data, forceCall);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT =
0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT =
0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
AddressUpgradeable.functionDelegateCall(
IBeaconUpgradeable(newBeacon).implementation(),
data
);
}
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/UUPSUpgradeable.sol)
pragma solidity ^0.8.0;
/**
* @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.
*
* _Available since v4.1._
*/
abstract contract UUPSUpgradeable is
Initializable,
IERC1822ProxiableUpgradeable,
ERC1967UpgradeUpgradeable
{
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
address private immutable __self = address(this);
/**
* @dev Check that the execution is being performed through a delegatecall call and that the execution context is
* a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
* for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
* function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
* fail.
*/
modifier onlyProxy() {
require(address(this) != __self, "Function must be called through delegatecall");
require(_getImplementation() == __self, "Function must be called through active proxy");
_;
}
/**
* @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() {
require(
address(this) == __self,
"UUPSUpgradeable: must not be called through delegatecall"
);
_;
}
function __UUPSUpgradeable_init() internal onlyInitializing {}
function __UUPSUpgradeable_init_unchained() internal onlyInitializing {}
/**
* @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
* implementation. It is used to validate the implementation's compatibility when performing an upgrade.
*
* IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
* bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
* function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
*/
function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
return _IMPLEMENTATION_SLOT;
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*
* @custom:oz-upgrades-unsafe-allow-reachable delegatecall
*/
function upgradeTo(address newImplementation) public virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
}
/**
* @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, true);
}
/**
* @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
* {upgradeTo} and {upgradeToAndCall}.
*
* Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
*
* ```solidity
* function _authorizeUpgrade(address) internal override onlyOwner {}
* ```
*/
function _authorizeUpgrade(address newImplementation) internal virtual;
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts-upgradeable/token/ERC1155/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
/**
* @dev _Available since v3.1._
*/
interface IERC1155ReceiverUpgradeable is IERC165Upgradeable {
/**
* @dev Handles the receipt of a single ERC1155 token type. This function is
* called at the end of a `safeTransferFrom` after the balance has been updated.
*
* NOTE: To accept the transfer, this must return
* `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
* (i.e. 0xf23a6e61, or its own function selector).
*
* @param operator The address which initiated the transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param id The ID of the token being transferred
* @param value The amount of tokens being transferred
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
* @dev Handles the receipt of a multiple ERC1155 token types. This function
* is called at the end of a `safeBatchTransferFrom` after the balances have
* been updated.
*
* NOTE: To accept the transfer(s), this must return
* `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
* (i.e. 0xbc197c81, or its own function selector).
*
* @param operator The address which initiated the batch transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param ids An array containing ids of each token being transferred (order and length must match values array)
* @param values An array containing amounts of each token being transferred (order and length must match ids array)
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts-upgradeable/token/ERC1155/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(
address indexed operator,
address indexed from,
address indexed to,
uint256 id,
uint256 value
);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(
address[] calldata accounts,
uint256[] calldata ids
) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/extensions/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* ==== Security Considerations
*
* There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
* expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
* considered as an intention to spend the allowance in any specific way. The second is that because permits have
* built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
* take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
* generally recommended is:
*
* ```solidity
* function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
* try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
* doThing(..., value);
* }
*
* function doThing(..., uint256 value) public {
* token.safeTransferFrom(msg.sender, address(this), value);
* ...
* }
* ```
*
* Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
* `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
* {SafeERC20-safeTransferFrom}).
*
* Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
* contracts should have entry points that don't rely on permit.
*/
interface IERC20PermitUpgradeable {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*
* CAUTION: See Security Considerations above.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20Upgradeable {
using AddressUpgradeable for address;
/**
* @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(IERC20Upgradeable token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, 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(
IERC20Upgradeable token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(
token,
abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
);
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20Upgradeable token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(
IERC20Upgradeable token,
address spender,
uint256 value
) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)
);
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeDecreaseAllowance(
IERC20Upgradeable token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)
);
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
* to be set to zero before setting it to a non-zero value, such as USDT.
*/
function forceApprove(IERC20Upgradeable token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
* Revert on invalid signature.
*/
function safePermit(
IERC20PermitUpgradeable token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(
data,
"SafeERC20: low-level call failed"
);
require(
returndata.length == 0 || abi.decode(returndata, (bool)),
"SafeERC20: ERC20 operation did not succeed"
);
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(
IERC20Upgradeable token,
bytes memory data
) private returns (bool) {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return
success &&
(returndata.length == 0 || abi.decode(returndata, (bool))) &&
AddressUpgradeable.isContract(address(token));
}
}
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal onlyInitializing {}
function __ERC165_init_unchained() internal onlyInitializing {}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Storage.sol)
pragma solidity ^0.8.0;
/**
* @dev Storage based implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165StorageUpgradeable is Initializable, ERC165Upgradeable {
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
function __ERC165Storage_init() internal onlyInitializing {}
function __ERC165Storage_init_unchained() internal onlyInitializing {}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// File @openzeppelin/contracts/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// File @openzeppelin/contracts/access/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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.
*
* By default, the owner account will be the one that deploys the contract. 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;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @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 {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @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 {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_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);
}
}
// File @openzeppelin/contracts/proxy/beacon/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
* @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.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// File @openzeppelin/contracts/interfaces/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
* @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
* proxy whose upgrades are fully controlled by the current implementation.
*/
interface IERC1822Proxiable {
/**
* @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
* address.
*
* IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
* bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
* function revert if invoked through a proxy.
*/
function proxiableUUID() external view returns (bytes32);
}
// File @openzeppelin/contracts/interfaces/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)
pragma solidity ^0.8.0;
/**
* @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
*
* _Available since v4.8.3._
*/
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);
}
// File @openzeppelin/contracts/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data
) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data
) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// File @openzeppelin/contracts/utils/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```solidity
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
* _Available since v4.9 for `string`, `bytes`._
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
struct StringSlot {
string value;
}
struct BytesSlot {
bytes value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` with member `value` located at `slot`.
*/
function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` representation of the string storage pointer `store`.
*/
function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
/**
* @dev Returns an `BytesSlot` with member `value` located at `slot`.
*/
function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
*/
function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
}
// File @openzeppelin/contracts/proxy/ERC1967/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*/
abstract contract ERC1967Upgrade is IERC1967 {
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT =
0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT =
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(
Address.isContract(newImplementation),
"ERC1967: new implementation is not a contract"
);
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallUUPS(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
// Upgrades from old implementations will perform a rollback test. This test requires the new
// implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
// this special case will break upgrade paths from old UUPS implementation to new ones.
if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
_setImplementation(newImplementation);
} else {
try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
} catch {
revert("ERC1967Upgrade: new implementation is not UUPS");
}
_upgradeToAndCall(newImplementation, data, forceCall);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT =
0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT =
0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
Address.isContract(IBeacon(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
}
}
}
// File @openzeppelin/contracts/proxy/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @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 {
_beforeFallback();
_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();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overridden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// File @openzeppelin/contracts/proxy/beacon/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/beacon/BeaconProxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This contract implements a proxy that gets the implementation address for each call from an {UpgradeableBeacon}.
*
* The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't
* conflict with the storage layout of the implementation behind the proxy.
*
* _Available since v3.4._
*/
contract BeaconProxy is Proxy, ERC1967Upgrade {
/**
* @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}.
*/
constructor(address beacon, bytes memory data) payable {
_upgradeBeaconToAndCall(beacon, data, false);
}
/**
* @dev Returns the current beacon address.
*/
function _beacon() internal view virtual returns (address) {
return _getBeacon();
}
/**
* @dev Returns the current implementation address of the associated beacon.
*/
function _implementation() internal view virtual override returns (address) {
return IBeacon(_getBeacon()).implementation();
}
/**
* @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}.
*
* If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
*
* Requirements:
*
* - `beacon` must be a contract.
* - The implementation returned by `beacon` must be a contract.
*/
function _setBeacon(address beacon, bytes memory data) internal virtual {
_upgradeBeaconToAndCall(beacon, data, false);
}
}
// File @openzeppelin/contracts/proxy/beacon/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/UpgradeableBeacon.sol)
pragma solidity ^0.8.0;
/**
* @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 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 deployer account as the owner who can upgrade the
* beacon.
*/
constructor(address implementation_) {
_setImplementation(implementation_);
}
/**
* @dev Returns the current implementation address.
*/
function implementation() public view virtual override 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);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation contract address for this beacon
*
* Requirements:
*
* - `newImplementation` must be a contract.
*/
function _setImplementation(address newImplementation) private {
require(
Address.isContract(newImplementation),
"UpgradeableBeacon: implementation is not a contract"
);
_implementation = newImplementation;
}
}
// File @openzeppelin/contracts/proxy/ERC1967/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/ERC1967/ERC1967Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
* implementation address that can be changed. This address is stored in storage in the location specified by
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
* implementation behind the proxy.
*/
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
/**
* @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
*
* If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
* function call, and allows initializing the storage of the proxy like a Solidity constructor.
*/
constructor(address _logic, bytes memory _data) payable {
_upgradeToAndCall(_logic, _data, false);
}
/**
* @dev Returns the current implementation address.
*/
function _implementation() internal view virtual override returns (address impl) {
return ERC1967Upgrade._getImplementation();
}
}
// File @openzeppelin/contracts/proxy/transparent/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/transparent/TransparentUpgradeableProxy.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface for {TransparentUpgradeableProxy}. In order to implement transparency, {TransparentUpgradeableProxy}
* does not implement this interface directly, and some of its functions are implemented by an internal dispatch
* mechanism. The compiler is unaware that these functions are implemented by {TransparentUpgradeableProxy} and will not
* include them in the ABI so this interface must be used to interact with it.
*/
interface ITransparentUpgradeableProxy is IERC1967 {
function admin() external view returns (address);
function implementation() external view returns (address);
function changeAdmin(address) external;
function upgradeTo(address) external;
function upgradeToAndCall(address, bytes memory) external payable;
}
/**
* @dev This contract implements a proxy that is upgradeable by an admin.
*
* To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
* clashing], which can potentially be used in an attack, this contract uses the
* https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
* things that go hand in hand:
*
* 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
* that call matches one of the admin functions exposed by the proxy itself.
* 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
* implementation. If the admin tries to call a function on the implementation it will fail with an error that says
* "admin cannot fallback to proxy target".
*
* These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
* the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
* to sudden errors when trying to call a function from the proxy implementation.
*
* Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
* you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
*
* NOTE: The real interface of this proxy is that defined in `ITransparentUpgradeableProxy`. This contract does not
* inherit from that interface, and instead the admin functions are implicitly implemented using a custom dispatch
* mechanism in `_fallback`. Consequently, the compiler will not produce an ABI for this contract. This is necessary to
* fully implement transparency without decoding reverts caused by selector clashes between the proxy and the
* implementation.
*
* WARNING: It is not recommended to extend this contract to add additional external functions. If you do so, the compiler
* will not check that there are no selector conflicts, due to the note above. A selector clash between any new function
* and the functions declared in {ITransparentUpgradeableProxy} will be resolved in favor of the new one. This could
* render the admin operations inaccessible, which could prevent upgradeability. Transparency may also be compromised.
*/
contract TransparentUpgradeableProxy is ERC1967Proxy {
/**
* @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
* optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
*/
constructor(
address _logic,
address admin_,
bytes memory _data
) payable ERC1967Proxy(_logic, _data) {
_changeAdmin(admin_);
}
/**
* @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
*
* CAUTION: This modifier is deprecated, as it could cause issues if the modified function has arguments, and the
* implementation provides a function with the same selector.
*/
modifier ifAdmin() {
if (msg.sender == _getAdmin()) {
_;
} else {
_fallback();
}
}
/**
* @dev If caller is the admin process the call internally, otherwise transparently fallback to the proxy behavior
*/
function _fallback() internal virtual override {
if (msg.sender == _getAdmin()) {
bytes memory ret;
bytes4 selector = msg.sig;
if (selector == ITransparentUpgradeableProxy.upgradeTo.selector) {
ret = _dispatchUpgradeTo();
} else if (selector == ITransparentUpgradeableProxy.upgradeToAndCall.selector) {
ret = _dispatchUpgradeToAndCall();
} else if (selector == ITransparentUpgradeableProxy.changeAdmin.selector) {
ret = _dispatchChangeAdmin();
} else if (selector == ITransparentUpgradeableProxy.admin.selector) {
ret = _dispatchAdmin();
} else if (selector == ITransparentUpgradeableProxy.implementation.selector) {
ret = _dispatchImplementation();
} else {
revert("TransparentUpgradeableProxy: admin cannot fallback to proxy target");
}
assembly {
return(add(ret, 0x20), mload(ret))
}
} else {
super._fallback();
}
}
/**
* @dev Returns the current admin.
*
* TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
* https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
* `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
*/
function _dispatchAdmin() private returns (bytes memory) {
_requireZeroValue();
address admin = _getAdmin();
return abi.encode(admin);
}
/**
* @dev Returns the current implementation.
*
* TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
* https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
* `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
*/
function _dispatchImplementation() private returns (bytes memory) {
_requireZeroValue();
address implementation = _implementation();
return abi.encode(implementation);
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _dispatchChangeAdmin() private returns (bytes memory) {
_requireZeroValue();
address newAdmin = abi.decode(msg.data[4:], (address));
_changeAdmin(newAdmin);
return "";
}
/**
* @dev Upgrade the implementation of the proxy.
*/
function _dispatchUpgradeTo() private returns (bytes memory) {
_requireZeroValue();
address newImplementation = abi.decode(msg.data[4:], (address));
_upgradeToAndCall(newImplementation, bytes(""), false);
return "";
}
/**
* @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
* by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
* proxied contract.
*/
function _dispatchUpgradeToAndCall() private returns (bytes memory) {
(address newImplementation, bytes memory data) = abi.decode(msg.data[4:], (address, bytes));
_upgradeToAndCall(newImplementation, data, true);
return "";
}
/**
* @dev Returns the current admin.
*
* CAUTION: This function is deprecated. Use {ERC1967Upgrade-_getAdmin} instead.
*/
function _admin() internal view virtual returns (address) {
return _getAdmin();
}
/**
* @dev To keep this contract fully transparent, all `ifAdmin` functions must be payable. This helper is here to
* emulate some proxy functions being non-payable while still allowing value to pass through.
*/
function _requireZeroValue() private {
require(msg.value == 0);
}
}
// File @openzeppelin/contracts/proxy/transparent/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.3) (proxy/transparent/ProxyAdmin.sol)
pragma solidity ^0.8.0;
/**
* @dev This is an auxiliary contract meant to be assigned as the admin of a {TransparentUpgradeableProxy}. For an
* explanation of why you would want to use this see the documentation for {TransparentUpgradeableProxy}.
*/
contract ProxyAdmin is Ownable {
/**
* @dev Returns the current implementation of `proxy`.
*
* Requirements:
*
* - This contract must be the admin of `proxy`.
*/
function getProxyImplementation(
ITransparentUpgradeableProxy proxy
) public view virtual returns (address) {
// We need to manually run the static call since the getter cannot be flagged as view
// bytes4(keccak256("implementation()")) == 0x5c60da1b
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"5c60da1b");
require(success);
return abi.decode(returndata, (address));
}
/**
* @dev Returns the current admin of `proxy`.
*
* Requirements:
*
* - This contract must be the admin of `proxy`.
*/
function getProxyAdmin(
ITransparentUpgradeableProxy proxy
) public view virtual returns (address) {
// We need to manually run the static call since the getter cannot be flagged as view
// bytes4(keccak256("admin()")) == 0xf851a440
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"f851a440");
require(success);
return abi.decode(returndata, (address));
}
/**
* @dev Changes the admin of `proxy` to `newAdmin`.
*
* Requirements:
*
* - This contract must be the current admin of `proxy`.
*/
function changeProxyAdmin(
ITransparentUpgradeableProxy proxy,
address newAdmin
) public virtual onlyOwner {
proxy.changeAdmin(newAdmin);
}
/**
* @dev Upgrades `proxy` to `implementation`. See {TransparentUpgradeableProxy-upgradeTo}.
*
* Requirements:
*
* - This contract must be the admin of `proxy`.
*/
function upgrade(
ITransparentUpgradeableProxy proxy,
address implementation
) public virtual onlyOwner {
proxy.upgradeTo(implementation);
}
/**
* @dev Upgrades `proxy` to `implementation` and calls a function on the new implementation. See
* {TransparentUpgradeableProxy-upgradeToAndCall}.
*
* Requirements:
*
* - This contract must be the admin of `proxy`.
*/
function upgradeAndCall(
ITransparentUpgradeableProxy proxy,
address implementation,
bytes memory data
) public payable virtual onlyOwner {
proxy.upgradeToAndCall{value: msg.value}(implementation, data);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts/interfaces/[email protected]
// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC1271 standard signature validation method for
* contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
*
* _Available since v4.1._
*/
interface IERC1271 {
/**
* @dev Should return whether the signature provided is valid for the provided data
* @param hash Hash of the data to be signed
* @param signature Signature byte array associated with _data
*/
function isValidSignature(
bytes32 hash,
bytes memory signature
) external view returns (bytes4 magicValue);
}
// File src/core/dao/IDAO.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.8;
/// @title IDAO
/// @author Aragon Association - 2022-2023
/// @notice The interface required for DAOs within the Aragon App DAO framework.
interface IDAO {
/// @notice The action struct to be consumed by the DAO's `execute` function resulting in an external call.
/// @param to The address to call.
/// @param value The native token value to be sent with the call.
/// @param data The bytes-encoded function selector and calldata for the call.
struct Action {
address to;
uint256 value;
bytes data;
}
/// @notice Checks if an address has permission on a contract via a permission identifier and considers if `ANY_ADDRESS` was used in the granting process.
/// @param _where The address of the contract.
/// @param _who The address of a EOA or contract to give the permissions.
/// @param _permissionId The permission identifier.
/// @param _data The optional data passed to the `PermissionCondition` registered.
/// @return Returns true if the address has permission, false if not.
function hasPermission(
address _where,
address _who,
bytes32 _permissionId,
bytes memory _data
) external view returns (bool);
/// @notice Updates the DAO metadata (e.g., an IPFS hash).
/// @param _metadata The IPFS hash of the new metadata object.
function setMetadata(bytes calldata _metadata) external;
/// @notice Emitted when the DAO metadata is updated.
/// @param metadata The IPFS hash of the new metadata object.
event MetadataSet(bytes metadata);
/// @notice Executes a list of actions. If a zero allow-failure map is provided, a failing action reverts the entire execution. If a non-zero allow-failure map is provided, allowed actions can fail without the entire call being reverted.
/// @param _callId The ID of the call. The definition of the value of `callId` is up to the calling contract and can be used, e.g., as a nonce.
/// @param _actions The array of actions.
/// @param _allowFailureMap A bitmap allowing execution to succeed, even if individual actions might revert. If the bit at index `i` is 1, the execution succeeds even if the `i`th action reverts. A failure map value of 0 requires every action to not revert.
/// @return The array of results obtained from the executed actions in `bytes`.
/// @return The resulting failure map containing the actions have actually failed.
function execute(
bytes32 _callId,
Action[] memory _actions,
uint256 _allowFailureMap
) external returns (bytes[] memory, uint256);
/// @notice Emitted when a proposal is executed.
/// @param actor The address of the caller.
/// @param callId The ID of the call.
/// @param actions The array of actions executed.
/// @param allowFailureMap The allow failure map encoding which actions are allowed to fail.
/// @param failureMap The failure map encoding which actions have failed.
/// @param execResults The array with the results of the executed actions.
/// @dev The value of `callId` is defined by the component/contract calling the execute function. A `Plugin` implementation can use it, for example, as a nonce.
event Executed(
address indexed actor,
bytes32 callId,
Action[] actions,
uint256 allowFailureMap,
uint256 failureMap,
bytes[] execResults
);
/// @notice Emitted when a standard callback is registered.
/// @param interfaceId The ID of the interface.
/// @param callbackSelector The selector of the callback function.
/// @param magicNumber The magic number to be registered for the callback function selector.
event StandardCallbackRegistered(
bytes4 interfaceId,
bytes4 callbackSelector,
bytes4 magicNumber
);
/// @notice Deposits (native) tokens to the DAO contract with a reference string.
/// @param _token The address of the token or address(0) in case of the native token.
/// @param _amount The amount of tokens to deposit.
/// @param _reference The reference describing the deposit reason.
function deposit(address _token, uint256 _amount, string calldata _reference) external payable;
/// @notice Emitted when a token deposit has been made to the DAO.
/// @param sender The address of the sender.
/// @param token The address of the deposited token.
/// @param amount The amount of tokens deposited.
/// @param _reference The reference describing the deposit reason.
event Deposited(
address indexed sender,
address indexed token,
uint256 amount,
string _reference
);
/// @notice Emitted when a native token deposit has been made to the DAO.
/// @dev This event is intended to be emitted in the `receive` function and is therefore bound by the gas limitations for `send`/`transfer` calls introduced by [ERC-2929](https://eips.ethereum.org/EIPS/eip-2929).
/// @param sender The address of the sender.
/// @param amount The amount of native tokens deposited.
event NativeTokenDeposited(address sender, uint256 amount);
/// @notice Setter for the trusted forwarder verifying the meta transaction.
/// @param _trustedForwarder The trusted forwarder address.
function setTrustedForwarder(address _trustedForwarder) external;
/// @notice Getter for the trusted forwarder verifying the meta transaction.
/// @return The trusted forwarder address.
function getTrustedForwarder() external view returns (address);
/// @notice Emitted when a new TrustedForwarder is set on the DAO.
/// @param forwarder the new forwarder address.
event TrustedForwarderSet(address forwarder);
/// @notice Setter for the [ERC-1271](https://eips.ethereum.org/EIPS/eip-1271) signature validator contract.
/// @param _signatureValidator The address of the signature validator.
function setSignatureValidator(address _signatureValidator) external;
/// @notice Emitted when the signature validator address is updated.
/// @param signatureValidator The address of the signature validator.
event SignatureValidatorSet(address signatureValidator);
/// @notice Checks whether a signature is valid for the provided hash by forwarding the call to the set [ERC-1271](https://eips.ethereum.org/EIPS/eip-1271) signature validator contract.
/// @param _hash The hash of the data to be signed.
/// @param _signature The signature byte array associated with `_hash`.
/// @return Returns the `bytes4` magic value `0x1626ba7e` if the signature is valid.
function isValidSignature(bytes32 _hash, bytes memory _signature) external returns (bytes4);
/// @notice Registers an ERC standard having a callback by registering its [ERC-165](https://eips.ethereum.org/EIPS/eip-165) interface ID and callback function signature.
/// @param _interfaceId The ID of the interface.
/// @param _callbackSelector The selector of the callback function.
/// @param _magicNumber The magic number to be registered for the function signature.
function registerStandardCallback(
bytes4 _interfaceId,
bytes4 _callbackSelector,
bytes4 _magicNumber
) external;
}
// File src/core/dao/IEIP4824.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity 0.8.17;
/// @title EIP-4824 Common Interfaces for DAOs
/// @dev See https://eips.ethereum.org/EIPS/eip-4824
/// @author Aragon Association - 2021-2023
interface IEIP4824 {
/// @notice A distinct Uniform Resource Identifier (URI) pointing to a JSON object following the "EIP-4824 DAO JSON-LD Schema". This JSON file splits into four URIs: membersURI, proposalsURI, activityLogURI, and governanceURI. The membersURI should point to a JSON file that conforms to the "EIP-4824 Members JSON-LD Schema". The proposalsURI should point to a JSON file that conforms to the "EIP-4824 Proposals JSON-LD Schema". The activityLogURI should point to a JSON file that conforms to the "EIP-4824 Activity Log JSON-LD Schema". The governanceURI should point to a flatfile, normatively a .md file. Each of the JSON files named above can be statically hosted or dynamically-generated.
/// @return _daoURI The DAO URI.
function daoURI() external view returns (string memory _daoURI);
}
// File src/core/permission/IPermissionCondition.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.8;
/// @title IPermissionCondition
/// @author Aragon Association - 2021-2023
/// @notice An interface to be implemented to support custom permission logic.
/// @dev To attach a condition to a permission, the `grantWithCondition` function must be used and refer to the implementing contract's address with the `condition` argument.
interface IPermissionCondition {
/// @notice Checks if a call is permitted.
/// @param _where The address of the target contract.
/// @param _who The address (EOA or contract) for which the permissions are checked.
/// @param _permissionId The permission identifier.
/// @param _data Optional data passed to the `PermissionCondition` implementation.
/// @return isPermitted Returns true if the call is permitted.
function isGranted(
address _where,
address _who,
bytes32 _permissionId,
bytes calldata _data
) external view returns (bool isPermitted);
}
// File src/core/permission/PermissionCondition.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.8;
/// @title PermissionCondition
/// @author Aragon Association - 2023
/// @notice An abstract contract for non-upgradeable contracts instantiated via the `new` keyword to inherit from to support customary permissions depending on arbitrary on-chain state.
abstract contract PermissionCondition is ERC165, IPermissionCondition {
/// @notice Checks if an interface is supported by this or its parent contract.
/// @param _interfaceId The ID of the interface.
/// @return Returns `true` if the interface is supported.
function supportsInterface(bytes4 _interfaceId) public view virtual override returns (bool) {
return
_interfaceId == type(IPermissionCondition).interfaceId ||
super.supportsInterface(_interfaceId);
}
}
// File src/core/permission/PermissionLib.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.8;
/// @title PermissionLib
/// @author Aragon Association - 2021-2023
/// @notice A library containing objects for permission processing.
library PermissionLib {
/// @notice A constant expressing that no condition is applied to a permission.
address public constant NO_CONDITION = address(0);
/// @notice The types of permission operations available in the `PermissionManager`.
/// @param Grant The grant operation setting a permission without a condition.
/// @param Revoke The revoke operation removing a permission (that was granted with or without a condition).
/// @param GrantWithCondition The grant operation setting a permission with a condition.
enum Operation {
Grant,
Revoke,
GrantWithCondition
}
/// @notice A struct containing the information for a permission to be applied on a single target contract without a condition.
/// @param operation The permission operation type.
/// @param who The address (EOA or contract) receiving the permission.
/// @param permissionId The permission identifier.
struct SingleTargetPermission {
Operation operation;
address who;
bytes32 permissionId;
}
/// @notice A struct containing the information for a permission to be applied on multiple target contracts, optionally, with a condition.
/// @param operation The permission operation type.
/// @param where The address of the target contract for which `who` receives permission.
/// @param who The address (EOA or contract) receiving the permission.
/// @param condition The `PermissionCondition` that will be asked for authorization on calls connected to the specified permission identifier.
/// @param permissionId The permission identifier.
struct MultiTargetPermission {
Operation operation;
address where;
address who;
address condition;
bytes32 permissionId;
}
}
// File src/core/permission/PermissionManager.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.8;
/// @title PermissionManager
/// @author Aragon Association - 2021-2023
/// @notice The abstract permission manager used in a DAO, its associated plugins, and other framework-related components.
abstract contract PermissionManager is Initializable {
using AddressUpgradeable for address;
/// @notice The ID of the permission required to call the `grant`, `grantWithCondition`, `revoke`, and `bulk` function.
bytes32 public constant ROOT_PERMISSION_ID = keccak256("ROOT_PERMISSION");
/// @notice A special address encoding permissions that are valid for any address `who` or `where`.
address internal constant ANY_ADDR = address(type(uint160).max);
/// @notice A special address encoding if a permissions is not set and therefore not allowed.
address internal constant UNSET_FLAG = address(0);
/// @notice A special address encoding if a permission is allowed.
address internal constant ALLOW_FLAG = address(2);
/// @notice A mapping storing permissions as hashes (i.e., `permissionHash(where, who, permissionId)`) and their status encoded by an address (unset, allowed, or redirecting to a `PermissionCondition`).
mapping(bytes32 => address) internal permissionsHashed;
/// @notice Thrown if a call is unauthorized.
/// @param where The context in which the authorization reverted.
/// @param who The address (EOA or contract) missing the permission.
/// @param permissionId The permission identifier.
error Unauthorized(address where, address who, bytes32 permissionId);
/// @notice Thrown if a permission has been already granted with a different condition.
/// @dev This makes sure that condition on the same permission can not be overwriten by a different condition.
/// @param where The address of the target contract to grant `_who` permission to.
/// @param who The address (EOA or contract) to which the permission has already been granted.
/// @param permissionId The permission identifier.
/// @param currentCondition The current condition set for permissionId.
/// @param newCondition The new condition it tries to set for permissionId.
error PermissionAlreadyGrantedForDifferentCondition(
address where,
address who,
bytes32 permissionId,
address currentCondition,
address newCondition
);
/// @notice Thrown if a condition address is not a contract.
/// @param condition The address that is not a contract.
error ConditionNotAContract(IPermissionCondition condition);
/// @notice Thrown if a condition contract does not support the `IPermissionCondition` interface.
/// @param condition The address that is not a contract.
error ConditionInterfacNotSupported(IPermissionCondition condition);
/// @notice Thrown for `ROOT_PERMISSION_ID` or `EXECUTE_PERMISSION_ID` permission grants where `who` or `where` is `ANY_ADDR`.
error PermissionsForAnyAddressDisallowed();
/// @notice Thrown for permission grants where `who` and `where` are both `ANY_ADDR`.
error AnyAddressDisallowedForWhoAndWhere();
/// @notice Thrown if `Operation.GrantWithCondition` is requested as an operation but the method does not support it.
error GrantWithConditionNotSupported();
/// @notice Emitted when a permission `permission` is granted in the context `here` to the address `_who` for the contract `_where`.
/// @param permissionId The permission identifier.
/// @param here The address of the context in which the permission is granted.
/// @param where The address of the target contract for which `_who` receives permission.
/// @param who The address (EOA or contract) receiving the permission.
/// @param condition The address `ALLOW_FLAG` for regular permissions or, alternatively, the `IPermissionCondition` contract implementation to be used.
event Granted(
bytes32 indexed permissionId,
address indexed here,
address where,
address indexed who,
address condition
);
/// @notice Emitted when a permission `permission` is revoked in the context `here` from the address `_who` for the contract `_where`.
/// @param permissionId The permission identifier.
/// @param here The address of the context in which the permission is revoked.
/// @param where The address of the target contract for which `_who` loses permission.
/// @param who The address (EOA or contract) losing the permission.
event Revoked(
bytes32 indexed permissionId,
address indexed here,
address where,
address indexed who
);
/// @notice A modifier to make functions on inheriting contracts authorized. Permissions to call the function are checked through this permission manager.
/// @param _permissionId The permission identifier required to call the method this modifier is applied to.
modifier auth(bytes32 _permissionId) {
_auth(_permissionId);
_;
}
/// @notice Initialization method to set the initial owner of the permission manager.
/// @dev The initial owner is granted the `ROOT_PERMISSION_ID` permission.
/// @param _initialOwner The initial owner of the permission manager.
function __PermissionManager_init(address _initialOwner) internal onlyInitializing {
_initializePermissionManager(_initialOwner);
}
/// @notice Grants permission to an address to call methods in a contract guarded by an auth modifier with the specified permission identifier.
/// @dev Requires the `ROOT_PERMISSION_ID` permission.
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) receiving the permission.
/// @param _permissionId The permission identifier.
/// @dev Note, that granting permissions with `_who` or `_where` equal to `ANY_ADDR` does not replace other permissions with specific `_who` and `_where` addresses that exist in parallel.
function grant(
address _where,
address _who,
bytes32 _permissionId
) external virtual auth(ROOT_PERMISSION_ID) {
_grant(_where, _who, _permissionId);
}
/// @notice Grants permission to an address to call methods in a target contract guarded by an auth modifier with the specified permission identifier if the referenced condition permits it.
/// @dev Requires the `ROOT_PERMISSION_ID` permission
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) receiving the permission.
/// @param _permissionId The permission identifier.
/// @param _condition The `PermissionCondition` that will be asked for authorization on calls connected to the specified permission identifier.
/// @dev Note, that granting permissions with `_who` or `_where` equal to `ANY_ADDR` does not replace other permissions with specific `_who` and `_where` addresses that exist in parallel.
function grantWithCondition(
address _where,
address _who,
bytes32 _permissionId,
IPermissionCondition _condition
) external virtual auth(ROOT_PERMISSION_ID) {
_grantWithCondition(_where, _who, _permissionId, _condition);
}
/// @notice Revokes permission from an address to call methods in a target contract guarded by an auth modifier with the specified permission identifier.
/// @dev Requires the `ROOT_PERMISSION_ID` permission.
/// @param _where The address of the target contract for which `_who` loses permission.
/// @param _who The address (EOA or contract) losing the permission.
/// @param _permissionId The permission identifier.
/// @dev Note, that revoking permissions with `_who` or `_where` equal to `ANY_ADDR` does not revoke other permissions with specific `_who` and `_where` addresses that exist in parallel.
function revoke(
address _where,
address _who,
bytes32 _permissionId
) external virtual auth(ROOT_PERMISSION_ID) {
_revoke(_where, _who, _permissionId);
}
/// @notice Applies an array of permission operations on a single target contracts `_where`.
/// @param _where The address of the single target contract.
/// @param items The array of single-targeted permission operations to apply.
function applySingleTargetPermissions(
address _where,
PermissionLib.SingleTargetPermission[] calldata items
) external virtual auth(ROOT_PERMISSION_ID) {
for (uint256 i; i < items.length; ) {
PermissionLib.SingleTargetPermission memory item = items[i];
if (item.operation == PermissionLib.Operation.Grant) {
_grant(_where, item.who, item.permissionId);
} else if (item.operation == PermissionLib.Operation.Revoke) {
_revoke(_where, item.who, item.permissionId);
} else if (item.operation == PermissionLib.Operation.GrantWithCondition) {
revert GrantWithConditionNotSupported();
}
unchecked {
++i;
}
}
}
/// @notice Applies an array of permission operations on multiple target contracts `items[i].where`.
/// @param _items The array of multi-targeted permission operations to apply.
function applyMultiTargetPermissions(
PermissionLib.MultiTargetPermission[] calldata _items
) external virtual auth(ROOT_PERMISSION_ID) {
for (uint256 i; i < _items.length; ) {
PermissionLib.MultiTargetPermission memory item = _items[i];
if (item.operation == PermissionLib.Operation.Grant) {
_grant(item.where, item.who, item.permissionId);
} else if (item.operation == PermissionLib.Operation.Revoke) {
_revoke(item.where, item.who, item.permissionId);
} else if (item.operation == PermissionLib.Operation.GrantWithCondition) {
_grantWithCondition(
item.where,
item.who,
item.permissionId,
IPermissionCondition(item.condition)
);
}
unchecked {
++i;
}
}
}
/// @notice Checks if an address has permission on a contract via a permission identifier and considers if `ANY_ADDRESS` was used in the granting process.
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) for which the permission is checked.
/// @param _permissionId The permission identifier.
/// @param _data The optional data passed to the `PermissionCondition` registered.
/// @return Returns true if `_who` has the permissions on the target contract via the specified permission identifier.
function isGranted(
address _where,
address _who,
bytes32 _permissionId,
bytes memory _data
) public view virtual returns (bool) {
return
_isGranted(_where, _who, _permissionId, _data) || // check if `_who` has permission for `_permissionId` on `_where`
_isGranted(_where, ANY_ADDR, _permissionId, _data) || // check if anyone has permission for `_permissionId` on `_where`
_isGranted(ANY_ADDR, _who, _permissionId, _data); // check if `_who` has permission for `_permissionI` on any contract
}
/// @notice Grants the `ROOT_PERMISSION_ID` permission to the initial owner during initialization of the permission manager.
/// @param _initialOwner The initial owner of the permission manager.
function _initializePermissionManager(address _initialOwner) internal {
_grant(address(this), _initialOwner, ROOT_PERMISSION_ID);
}
/// @notice This method is used in the external `grant` method of the permission manager.
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) owning the permission.
/// @param _permissionId The permission identifier.
/// @dev Note, that granting permissions with `_who` or `_where` equal to `ANY_ADDR` does not replace other permissions with specific `_who` and `_where` addresses that exist in parallel.
function _grant(address _where, address _who, bytes32 _permissionId) internal virtual {
if (_where == ANY_ADDR || _who == ANY_ADDR) {
revert PermissionsForAnyAddressDisallowed();
}
bytes32 permHash = permissionHash(_where, _who, _permissionId);
address currentFlag = permissionsHashed[permHash];
// Means permHash is not currently set.
if (currentFlag == UNSET_FLAG) {
permissionsHashed[permHash] = ALLOW_FLAG;
emit Granted(_permissionId, msg.sender, _where, _who, ALLOW_FLAG);
}
}
/// @notice This method is used in the external `grantWithCondition` method of the permission manager.
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) owning the permission.
/// @param _permissionId The permission identifier.
/// @param _condition An address either resolving to a `PermissionCondition` contract address or being the `ALLOW_FLAG` address (`address(2)`).
/// @dev Note, that granting permissions with `_who` or `_where` equal to `ANY_ADDR` does not replace other permissions with specific `_who` and `_where` addresses that exist in parallel.
function _grantWithCondition(
address _where,
address _who,
bytes32 _permissionId,
IPermissionCondition _condition
) internal virtual {
address conditionAddr = address(_condition);
if (!conditionAddr.isContract()) {
revert ConditionNotAContract(_condition);
}
if (
!PermissionCondition(conditionAddr).supportsInterface(
type(IPermissionCondition).interfaceId
)
) {
revert ConditionInterfacNotSupported(_condition);
}
if (_where == ANY_ADDR && _who == ANY_ADDR) {
revert AnyAddressDisallowedForWhoAndWhere();
}
if (_where == ANY_ADDR || _who == ANY_ADDR) {
if (
_permissionId == ROOT_PERMISSION_ID ||
isPermissionRestrictedForAnyAddr(_permissionId)
) {
revert PermissionsForAnyAddressDisallowed();
}
}
bytes32 permHash = permissionHash(_where, _who, _permissionId);
address currentCondition = permissionsHashed[permHash];
// Means permHash is not currently set.
if (currentCondition == UNSET_FLAG) {
permissionsHashed[permHash] = conditionAddr;
emit Granted(_permissionId, msg.sender, _where, _who, conditionAddr);
} else if (currentCondition != conditionAddr) {
// Revert if `permHash` is already granted, but uses a different condition.
// If we don't revert, we either should:
// - allow overriding the condition on the same permission
// which could be confusing whoever granted the same permission first
// - or do nothing and succeed silently which could be confusing for the caller.
revert PermissionAlreadyGrantedForDifferentCondition({
where: _where,
who: _who,
permissionId: _permissionId,
currentCondition: currentCondition,
newCondition: conditionAddr
});
}
}
/// @notice This method is used in the public `revoke` method of the permission manager.
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) owning the permission.
/// @param _permissionId The permission identifier.
/// @dev Note, that revoking permissions with `_who` or `_where` equal to `ANY_ADDR` does not revoke other permissions with specific `_who` and `_where` addresses that might have been granted in parallel.
function _revoke(address _where, address _who, bytes32 _permissionId) internal virtual {
bytes32 permHash = permissionHash(_where, _who, _permissionId);
if (permissionsHashed[permHash] != UNSET_FLAG) {
permissionsHashed[permHash] = UNSET_FLAG;
emit Revoked(_permissionId, msg.sender, _where, _who);
}
}
/// @notice Checks if a caller is granted permissions on a target contract via a permission identifier and redirects the approval to a `PermissionCondition` if this was specified in the setup.
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) owning the permission.
/// @param _permissionId The permission identifier.
/// @param _data The optional data passed to the `PermissionCondition` registered.
/// @return Returns true if `_who` has the permissions on the contract via the specified permissionId identifier.
function _isGranted(
address _where,
address _who,
bytes32 _permissionId,
bytes memory _data
) internal view virtual returns (bool) {
address accessFlagOrCondition = permissionsHashed[
permissionHash(_where, _who, _permissionId)
];
if (accessFlagOrCondition == UNSET_FLAG) return false;
if (accessFlagOrCondition == ALLOW_FLAG) return true;
// Since it's not a flag, assume it's a PermissionCondition and try-catch to skip failures
try
IPermissionCondition(accessFlagOrCondition).isGranted(
_where,
_who,
_permissionId,
_data
)
returns (bool allowed) {
if (allowed) return true;
} catch {}
return false;
}
/// @notice A private function to be used to check permissions on the permission manager contract (`address(this)`) itself.
/// @param _permissionId The permission identifier required to call the method this modifier is applied to.
function _auth(bytes32 _permissionId) internal view virtual {
if (!isGranted(address(this), msg.sender, _permissionId, msg.data)) {
revert Unauthorized({
where: address(this),
who: msg.sender,
permissionId: _permissionId
});
}
}
/// @notice Generates the hash for the `permissionsHashed` mapping obtained from the word "PERMISSION", the contract address, the address owning the permission, and the permission identifier.
/// @param _where The address of the target contract for which `_who` receives permission.
/// @param _who The address (EOA or contract) owning the permission.
/// @param _permissionId The permission identifier.
/// @return The permission hash.
function permissionHash(
address _where,
address _who,
bytes32 _permissionId
) internal pure virtual returns (bytes32) {
return keccak256(abi.encodePacked("PERMISSION", _who, _where, _permissionId));
}
/// @notice Decides if the granting permissionId is restricted when `_who == ANY_ADDR` or `_where == ANY_ADDR`.
/// @param _permissionId The permission identifier.
/// @return Whether or not the permission is restricted.
/// @dev By default, every permission is unrestricted and it is the derived contract's responsibility to override it. Note, that the `ROOT_PERMISSION_ID` is included and not required to be set it again.
function isPermissionRestrictedForAnyAddr(
bytes32 _permissionId
) internal view virtual returns (bool) {
(_permissionId); // silence the warning.
return false;
}
/// @notice This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain (see [OpenZeppelin's guide about storage gaps](https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps)).
uint256[49] private __gap;
}
// File src/core/utils/BitMap.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity 0.8.17;
/// @param bitmap The `uint256` representation of bits.
/// @param index The index number to check whether 1 or 0 is set.
/// @return Returns `true` if the bit is set at `index` on `bitmap`.
function hasBit(uint256 bitmap, uint8 index) pure returns (bool) {
uint256 bitValue = bitmap & (1 << index);
return bitValue > 0;
}
/// @param bitmap The `uint256` representation of bits.
/// @param index The index number to set the bit.
/// @return Returns a new number in which the bit is set at `index`.
function flipBit(uint256 bitmap, uint8 index) pure returns (uint256) {
return bitmap ^ (1 << index);
}
// File src/core/utils/CallbackHandler.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity 0.8.17;
/// @title CallbackHandler
/// @author Aragon Association - 2022-2023
/// @notice This contract handles callbacks by registering a magic number together with the callback function's selector. It provides the `_handleCallback` function that inheriting contracts have to call inside their `fallback()` function (`_handleCallback(msg.callbackSelector, msg.data)`). This allows to adaptively register ERC standards (e.g., [ERC-721](https://eips.ethereum.org/EIPS/eip-721), [ERC-1115](https://eips.ethereum.org/EIPS/eip-1155), or future versions of [ERC-165](https://eips.ethereum.org/EIPS/eip-165)) and returning the required magic numbers for the associated callback functions for the inheriting contract so that it doesn't need to be upgraded.
/// @dev This callback handling functionality is intented to be used by executor contracts (i.e., `DAO.sol`).
abstract contract CallbackHandler {
/// @notice A mapping between callback function selectors and magic return numbers.
mapping(bytes4 => bytes4) internal callbackMagicNumbers;
/// @notice The magic number refering to unregistered callbacks.
bytes4 internal constant UNREGISTERED_CALLBACK = bytes4(0);
/// @notice Thrown if the callback function is not registered.
/// @param callbackSelector The selector of the callback function.
/// @param magicNumber The magic number to be registered for the callback function selector.
error UnkownCallback(bytes4 callbackSelector, bytes4 magicNumber);
/// @notice Emitted when `_handleCallback` is called.
/// @param sender Who called the callback.
/// @param sig The function signature.
/// @param data The calldata.
event CallbackReceived(address sender, bytes4 indexed sig, bytes data);
/// @notice Handles callbacks to adaptively support ERC standards.
/// @dev This function is supposed to be called via `_handleCallback(msg.sig, msg.data)` in the `fallback()` function of the inheriting contract.
/// @param _callbackSelector The function selector of the callback function.
/// @param _data The calldata.
/// @return The magic number registered for the function selector triggering the fallback.
function _handleCallback(
bytes4 _callbackSelector,
bytes memory _data
) internal virtual returns (bytes4) {
bytes4 magicNumber = callbackMagicNumbers[_callbackSelector];
if (magicNumber == UNREGISTERED_CALLBACK) {
revert UnkownCallback({callbackSelector: _callbackSelector, magicNumber: magicNumber});
}
emit CallbackReceived({sender: msg.sender, sig: _callbackSelector, data: _data});
return magicNumber;
}
/// @notice Registers a magic number for a callback function selector.
/// @param _callbackSelector The selector of the callback function.
/// @param _magicNumber The magic number to be registered for the callback function selector.
function _registerCallback(bytes4 _callbackSelector, bytes4 _magicNumber) internal virtual {
callbackMagicNumbers[_callbackSelector] = _magicNumber;
}
/// @notice This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain (see [OpenZeppelin's guide about storage gaps](https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps)).
uint256[49] private __gap;
}
// File src/utils/protocol/IProtocolVersion.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.8;
/// @title IProtocolVersion
/// @author Aragon Association - 2022-2023
/// @notice An interface defining the semantic OSx protocol version.
interface IProtocolVersion {
/// @notice Returns the protocol version at which the current contract was built. Use it to check for future upgrades that might be applicable.
/// @return _version Returns the semantic OSx protocol version.
function protocolVersion() external view returns (uint8[3] memory _version);
}
// File src/utils/protocol/ProtocolVersion.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity 0.8.17;
/// @title ProtocolVersion
/// @author Aragon Association - 2023
/// @notice An abstract, stateless, non-upgradeable contract serves as a base for other contracts requiring awareness of the OSx protocol version.
/// @dev Do not add any new variables to this contract that would shift down storage in the inheritance chain.
abstract contract ProtocolVersion is IProtocolVersion {
// IMPORTANT: Do not add any storage variable, see the above notice.
/// @inheritdoc IProtocolVersion
function protocolVersion() public pure returns (uint8[3] memory) {
return [1, 3, 0];
}
}
// File src/core/dao/DAO.sol
// Original license: SPDX_License_Identifier: AGPL-3.0-or-later
pragma solidity 0.8.17;
/// @title DAO
/// @author Aragon Association - 2021-2023
/// @notice This contract is the entry point to the Aragon DAO framework and provides our users a simple and easy to use public interface.
/// @dev Public API of the Aragon DAO framework.
contract DAO is
IEIP4824,
Initializable,
IERC1271,
ERC165StorageUpgradeable,
IDAO,
UUPSUpgradeable,
ProtocolVersion,
PermissionManager,
CallbackHandler
{
using SafeERC20Upgradeable for IERC20Upgradeable;
using AddressUpgradeable for address;
/// @notice The ID of the permission required to call the `execute` function.
bytes32 public constant EXECUTE_PERMISSION_ID = keccak256("EXECUTE_PERMISSION");
/// @notice The ID of the permission required to call the `_authorizeUpgrade` function.
bytes32 public constant UPGRADE_DAO_PERMISSION_ID = keccak256("UPGRADE_DAO_PERMISSION");
/// @notice The ID of the permission required to call the `setMetadata` function.
bytes32 public constant SET_METADATA_PERMISSION_ID = keccak256("SET_METADATA_PERMISSION");
/// @notice The ID of the permission required to call the `setTrustedForwarder` function.
bytes32 public constant SET_TRUSTED_FORWARDER_PERMISSION_ID =
keccak256("SET_TRUSTED_FORWARDER_PERMISSION");
/// @notice The ID of the permission required to call the `setSignatureValidator` function.
bytes32 public constant SET_SIGNATURE_VALIDATOR_PERMISSION_ID =
keccak256("SET_SIGNATURE_VALIDATOR_PERMISSION");
/// @notice The ID of the permission required to call the `registerStandardCallback` function.
bytes32 public constant REGISTER_STANDARD_CALLBACK_PERMISSION_ID =
keccak256("REGISTER_STANDARD_CALLBACK_PERMISSION");
/// @notice The internal constant storing the maximal action array length.
uint256 internal constant MAX_ACTIONS = 256;
/// @notice The first out of two values to which the `_reentrancyStatus` state variable (used by the `nonReentrant` modifier) can be set inidicating that a function was not entered.
uint256 private constant _NOT_ENTERED = 1;
/// @notice The second out of two values to which the `_reentrancyStatus` state variable (used by the `nonReentrant` modifier) can be set inidicating that a function was entered.
uint256 private constant _ENTERED = 2;
/// @notice The [ERC-1271](https://eips.ethereum.org/EIPS/eip-1271) signature validator contract.
/// @dev Added in v1.0.0.
IERC1271 public signatureValidator;
/// @notice The address of the trusted forwarder verifying meta transactions.
/// @dev Added in v1.0.0.
address private trustedForwarder;
/// @notice The [EIP-4824](https://eips.ethereum.org/EIPS/eip-4824) DAO URI.
/// @dev Added in v1.0.0.
string private _daoURI;
/// @notice The state variable for the reentrancy guard of the `execute` function.
/// @dev Added in v1.3.0. The variable can be of value `_NOT_ENTERED = 1` or `_ENTERED = 2` in usage and is initialized with `_NOT_ENTERED`.
uint256 private _reentrancyStatus;
/// @notice Thrown if a call is reentrant.
error ReentrantCall();
/// @notice Thrown if the action array length is larger than `MAX_ACTIONS`.
error TooManyActions();
/// @notice Thrown if action execution has failed.
/// @param index The index of the action in the action array that failed.
error ActionFailed(uint256 index);
/// @notice Thrown if an action has insufficent gas left.
error InsufficientGas();
/// @notice Thrown if the deposit amount is zero.
error ZeroAmount();
/// @notice Thrown if there is a mismatch between the expected and actually deposited amount of native tokens.
/// @param expected The expected native token amount.
/// @param actual The actual native token amount deposited.
error NativeTokenDepositAmountMismatch(uint256 expected, uint256 actual);
/// @notice Thrown if an upgrade is not supported from a specific protocol version .
error ProtocolVersionUpgradeNotSupported(uint8[3] protocolVersion);
/// @notice Emitted when a new DAO URI is set.
/// @param daoURI The new URI.
event NewURI(string daoURI);
/// @notice A modifier to protect a function from calling itself, directly or indirectly (reentrancy).
/// @dev Currently, this modifier is only applied to the `execute()` function. If this is used multiple times, private `_beforeNonReentrant()` and `_afterNonReentrant()` functions should be created to prevent code duplication.
modifier nonReentrant() {
if (_reentrancyStatus == _ENTERED) {
revert ReentrantCall();
}
_reentrancyStatus = _ENTERED;
_;
_reentrancyStatus = _NOT_ENTERED;
}
/// @notice Disables the initializers on the implementation contract to prevent it from being left uninitialized.
constructor() {
_disableInitializers();
}
/// @notice Initializes the DAO by
/// - setting the reentrancy status variable to `_NOT_ENTERED`
/// - registering the [ERC-165](https://eips.ethereum.org/EIPS/eip-165) interface ID
/// - setting the trusted forwarder for meta transactions
/// - giving the `ROOT_PERMISSION_ID` permission to the initial owner (that should be revoked and transferred to the DAO after setup).
/// @dev This method is required to support [ERC-1822](https://eips.ethereum.org/EIPS/eip-1822).
/// @param _metadata IPFS hash that points to all the metadata (logo, description, tags, etc.) of a DAO.
/// @param _initialOwner The initial owner of the DAO having the `ROOT_PERMISSION_ID` permission.
/// @param _trustedForwarder The trusted forwarder responsible for verifying meta transactions.
/// @param daoURI_ The DAO URI required to support [ERC-4824](https://eips.ethereum.org/EIPS/eip-4824).
function initialize(
bytes calldata _metadata,
address _initialOwner,
address _trustedForwarder,
string calldata daoURI_
) external reinitializer(2) {
_reentrancyStatus = _NOT_ENTERED; // added in v1.3.0
_registerInterface(type(IDAO).interfaceId);
_registerInterface(type(IERC1271).interfaceId);
_registerInterface(type(IEIP4824).interfaceId);
_registerInterface(type(IProtocolVersion).interfaceId); // added in v1.3.0
_registerTokenInterfaces();
_setMetadata(_metadata);
_setTrustedForwarder(_trustedForwarder);
_setDaoURI(daoURI_);
__PermissionManager_init(_initialOwner);
}
/// @notice Initializes the DAO after an upgrade from a previous protocol version.
/// @param _previousProtocolVersion The semantic protocol version number of the previous DAO implementation contract this upgrade is transitioning from.
/// @param _initData The initialization data to be passed to via `upgradeToAndCall` (see [ERC-1967](https://docs.openzeppelin.com/contracts/4.x/api/proxy#ERC1967Upgrade)).
function initializeFrom(
uint8[3] calldata _previousProtocolVersion,
bytes calldata _initData
) external reinitializer(2) {
_initData; // Silences the unused function parameter warning.
// Check that the contract is not upgrading from a different major release.
if (_previousProtocolVersion[0] != 1) {
revert ProtocolVersionUpgradeNotSupported(_previousProtocolVersion);
}
// Initialize `_reentrancyStatus` that was added in v1.3.0.
// Register Interface `ProtocolVersion` that was added in v1.3.0.
if (_previousProtocolVersion[1] <= 2) {
_reentrancyStatus = _NOT_ENTERED;
_registerInterface(type(IProtocolVersion).interfaceId);
}
}
/// @inheritdoc PermissionManager
function isPermissionRestrictedForAnyAddr(
bytes32 _permissionId
) internal pure override returns (bool) {
return
_permissionId == EXECUTE_PERMISSION_ID ||
_permissionId == UPGRADE_DAO_PERMISSION_ID ||
_permissionId == SET_METADATA_PERMISSION_ID ||
_permissionId == SET_TRUSTED_FORWARDER_PERMISSION_ID ||
_permissionId == SET_SIGNATURE_VALIDATOR_PERMISSION_ID ||
_permissionId == REGISTER_STANDARD_CALLBACK_PERMISSION_ID;
}
/// @notice Internal method authorizing the upgrade of the contract via the [upgradeability mechanism for UUPS proxies](https://docs.openzeppelin.com/contracts/4.x/api/proxy#UUPSUpgradeable) (see [ERC-1822](https://eips.ethereum.org/EIPS/eip-1822)).
/// @dev The caller must have the `UPGRADE_DAO_PERMISSION_ID` permission.
function _authorizeUpgrade(address) internal virtual override auth(UPGRADE_DAO_PERMISSION_ID) {}
/// @inheritdoc IDAO
function setTrustedForwarder(
address _newTrustedForwarder
) external override auth(SET_TRUSTED_FORWARDER_PERMISSION_ID) {
_setTrustedForwarder(_newTrustedForwarder);
}
/// @inheritdoc IDAO
function getTrustedForwarder() external view virtual override returns (address) {
return trustedForwarder;
}
/// @inheritdoc IDAO
function hasPermission(
address _where,
address _who,
bytes32 _permissionId,
bytes memory _data
) external view override returns (bool) {
return isGranted(_where, _who, _permissionId, _data);
}
/// @inheritdoc IDAO
function setMetadata(
bytes calldata _metadata
) external override auth(SET_METADATA_PERMISSION_ID) {
_setMetadata(_metadata);
}
/// @inheritdoc IDAO
function execute(
bytes32 _callId,
Action[] calldata _actions,
uint256 _allowFailureMap
)
external
override
nonReentrant
auth(EXECUTE_PERMISSION_ID)
returns (bytes[] memory execResults, uint256 failureMap)
{
// Check that the action array length is within bounds.
if (_actions.length > MAX_ACTIONS) {
revert TooManyActions();
}
execResults = new bytes[](_actions.length);
uint256 gasBefore;
uint256 gasAfter;
for (uint256 i = 0; i < _actions.length; ) {
gasBefore = gasleft();
(bool success, bytes memory result) = _actions[i].to.call{value: _actions[i].value}(
_actions[i].data
);
gasAfter = gasleft();
// Check if failure is allowed
if (!hasBit(_allowFailureMap, uint8(i))) {
// Check if the call failed.
if (!success) {
revert ActionFailed(i);
}
} else {
// Check if the call failed.
if (!success) {
// Make sure that the action call did not fail because 63/64 of `gasleft()` was insufficient to execute the external call `.to.call` (see [ERC-150](https://eips.ethereum.org/EIPS/eip-150)).
// In specific scenarios, i.e. proposal execution where the last action in the action array is allowed to fail, the account calling `execute` could force-fail this action by setting a gas limit
// where 63/64 is insufficient causing the `.to.call` to fail, but where the remaining 1/64 gas are sufficient to successfully finish the `execute` call.
if (gasAfter < gasBefore / 64) {
revert InsufficientGas();
}
// Store that this action failed.
failureMap = flipBit(failureMap, uint8(i));
}
}
execResults[i] = result;
unchecked {
++i;
}
}
emit Executed({
actor: msg.sender,
callId: _callId,
actions: _actions,
allowFailureMap: _allowFailureMap,
failureMap: failureMap,
execResults: execResults
});
}
/// @inheritdoc IDAO
function deposit(
address _token,
uint256 _amount,
string calldata _reference
) external payable override {
if (_amount == 0) revert ZeroAmount();
if (_token == address(0)) {
if (msg.value != _amount)
revert NativeTokenDepositAmountMismatch({expected: _amount, actual: msg.value});
} else {
if (msg.value != 0)
revert NativeTokenDepositAmountMismatch({expected: 0, actual: msg.value});
IERC20Upgradeable(_token).safeTransferFrom(msg.sender, address(this), _amount);
}
emit Deposited(msg.sender, _token, _amount, _reference);
}
/// @inheritdoc IDAO
function setSignatureValidator(
address _signatureValidator
) external override auth(SET_SIGNATURE_VALIDATOR_PERMISSION_ID) {
signatureValidator = IERC1271(_signatureValidator);
emit SignatureValidatorSet({signatureValidator: _signatureValidator});
}
/// @inheritdoc IDAO
function isValidSignature(
bytes32 _hash,
bytes memory _signature
) external view override(IDAO, IERC1271) returns (bytes4) {
if (address(signatureValidator) == address(0)) {
// Return the invalid magic number
return bytes4(0);
}
// Forward the call to the set signature validator contract
return signatureValidator.isValidSignature(_hash, _signature);
}
/// @notice Emits the `NativeTokenDeposited` event to track native token deposits that weren't made via the deposit method.
/// @dev This call is bound by the gas limitations for `send`/`transfer` calls introduced by [ERC-2929](https://eips.ethereum.org/EIPS/eip-2929).
/// Gas cost increases in future hard forks might break this function. As an alternative, [ERC-2930](https://eips.ethereum.org/EIPS/eip-2930)-type transactions using access lists can be employed.
receive() external payable {
emit NativeTokenDeposited(msg.sender, msg.value);
}
/// @notice Fallback to handle future versions of the [ERC-165](https://eips.ethereum.org/EIPS/eip-165) standard.
/// @param _input An alias being equivalent to `msg.data`. This feature of the fallback function was introduced with the [solidity compiler version 0.7.6](https://github.com/ethereum/solidity/releases/tag/v0.7.6)
/// @return The magic number registered for the function selector triggering the fallback.
fallback(bytes calldata _input) external returns (bytes memory) {
bytes4 magicNumber = _handleCallback(msg.sig, _input);
return abi.encode(magicNumber);
}
/// @notice Emits the MetadataSet event if new metadata is set.
/// @param _metadata Hash of the IPFS metadata object.
function _setMetadata(bytes calldata _metadata) internal {
emit MetadataSet(_metadata);
}
/// @notice Sets the trusted forwarder on the DAO and emits the associated event.
/// @param _trustedForwarder The trusted forwarder address.
function _setTrustedForwarder(address _trustedForwarder) internal {
trustedForwarder = _trustedForwarder;
emit TrustedForwarderSet(_trustedForwarder);
}
/// @notice Registers the [ERC-721](https://eips.ethereum.org/EIPS/eip-721) and [ERC-1155](https://eips.ethereum.org/EIPS/eip-1155) interfaces and callbacks.
function _registerTokenInterfaces() private {
_registerInterface(type(IERC721ReceiverUpgradeable).interfaceId);
_registerInterface(type(IERC1155ReceiverUpgradeable).interfaceId);
_registerCallback(
IERC721ReceiverUpgradeable.onERC721Received.selector,
IERC721ReceiverUpgradeable.onERC721Received.selector
);
_registerCallback(
IERC1155ReceiverUpgradeable.onERC1155Received.selector,
IERC1155ReceiverUpgradeable.onERC1155Received.selector
);
_registerCallback(
IERC1155ReceiverUpgradeable.onERC1155BatchReceived.selector,
IERC1155ReceiverUpgradeable.onERC1155BatchReceived.selector
);
}
/// @inheritdoc IDAO
function registerStandardCallback(
bytes4 _interfaceId,
bytes4 _callbackSelector,
bytes4 _magicNumber
) external override auth(REGISTER_STANDARD_CALLBACK_PERMISSION_ID) {
_registerInterface(_interfaceId);
_registerCallback(_callbackSelector, _magicNumber);
emit StandardCallbackRegistered(_interfaceId, _callbackSelector, _magicNumber);
}
/// @inheritdoc IEIP4824
function daoURI() external view returns (string memory) {
return _daoURI;
}
/// @notice Updates the set DAO URI to a new value.
/// @param newDaoURI The new DAO URI to be set.
function setDaoURI(string calldata newDaoURI) external auth(SET_METADATA_PERMISSION_ID) {
_setDaoURI(newDaoURI);
}
/// @notice Sets the new [ERC-4824](https://eips.ethereum.org/EIPS/eip-4824) DAO URI and emits the associated event.
/// @param daoURI_ The new DAO URI.
function _setDaoURI(string calldata daoURI_) internal {
_daoURI = daoURI_;
emit NewURI(daoURI_);
}
/// @notice This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain (see [OpenZeppelin's guide about storage gaps](https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps)).
uint256[46] private __gap;
}
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