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Contract Name:
ReceiveUln302
Compiler Version
v0.8.22+commit.4fc1097e
Optimization Enabled:
Yes with 20000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol"; import { SetConfigParam } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLibManager.sol"; import { ILayerZeroEndpointV2, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol"; import { IReceiveUlnE2 } from "../interfaces/IReceiveUlnE2.sol"; import { ReceiveUlnBase } from "../ReceiveUlnBase.sol"; import { ReceiveLibBaseE2 } from "../../ReceiveLibBaseE2.sol"; import { UlnConfig } from "../UlnBase.sol"; /// @dev This is a gluing contract. It simply parses the requests and forward to the super.impl() accordingly. /// @dev In this case, it combines the logic of ReceiveUlnBase and ReceiveLibBaseE2 contract ReceiveUln302 is IReceiveUlnE2, ReceiveUlnBase, ReceiveLibBaseE2 { using PacketV1Codec for bytes; /// @dev CONFIG_TYPE_ULN=2 here to align with SendUln302/ReceiveUln302/ReceiveUln301 uint32 internal constant CONFIG_TYPE_ULN = 2; error LZ_ULN_InvalidConfigType(uint32 configType); constructor(address _endpoint) ReceiveLibBaseE2(_endpoint) {} function supportsInterface(bytes4 _interfaceId) public view override returns (bool) { return _interfaceId == type(IReceiveUlnE2).interfaceId || super.supportsInterface(_interfaceId); } // ============================ OnlyEndpoint =================================== // only the ULN config on the receive side function setConfig(address _oapp, SetConfigParam[] calldata _params) external override onlyEndpoint { for (uint256 i = 0; i < _params.length; i++) { SetConfigParam calldata param = _params[i]; _assertSupportedEid(param.eid); if (param.configType == CONFIG_TYPE_ULN) { _setUlnConfig(param.eid, _oapp, abi.decode(param.config, (UlnConfig))); } else { revert LZ_ULN_InvalidConfigType(param.configType); } } } // ============================ External =================================== /// @dev dont need to check endpoint verifiable here to save gas, as it will reverts if not verifiable. function commitVerification(bytes calldata _packetHeader, bytes32 _payloadHash) external { _assertHeader(_packetHeader, localEid); // cache these values to save gas address receiver = _packetHeader.receiverB20(); uint32 srcEid = _packetHeader.srcEid(); UlnConfig memory config = getUlnConfig(receiver, srcEid); _verifyAndReclaimStorage(config, keccak256(_packetHeader), _payloadHash); Origin memory origin = Origin(srcEid, _packetHeader.sender(), _packetHeader.nonce()); // endpoint will revert if nonce <= lazyInboundNonce ILayerZeroEndpointV2(endpoint).verify(origin, receiver, _payloadHash); } /// @dev for dvn to verify the payload function verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations) external { _verify(_packetHeader, _payloadHash, _confirmations); } // ============================ View =================================== function getConfig(uint32 _eid, address _oapp, uint32 _configType) external view override returns (bytes memory) { if (_configType == CONFIG_TYPE_ULN) { return abi.encode(getUlnConfig(_oapp, _eid)); } else { revert LZ_ULN_InvalidConfigType(_configType); } } function isSupportedEid(uint32 _eid) external view override returns (bool) { return _isSupportedEid(_eid); } function version() external pure override returns (uint64 major, uint8 minor, uint8 endpointVersion) { return (3, 0, 2); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { IMessageLibManager } from "./IMessageLibManager.sol"; import { IMessagingComposer } from "./IMessagingComposer.sol"; import { IMessagingChannel } from "./IMessagingChannel.sol"; import { IMessagingContext } from "./IMessagingContext.sol"; struct MessagingParams { uint32 dstEid; bytes32 receiver; bytes message; bytes options; bool payInLzToken; } struct MessagingReceipt { bytes32 guid; uint64 nonce; MessagingFee fee; } struct MessagingFee { uint256 nativeFee; uint256 lzTokenFee; } struct Origin { uint32 srcEid; bytes32 sender; uint64 nonce; } interface ILayerZeroEndpointV2 is IMessageLibManager, IMessagingComposer, IMessagingChannel, IMessagingContext { event PacketSent(bytes encodedPayload, bytes options, address sendLibrary); event PacketVerified(Origin origin, address receiver, bytes32 payloadHash); event PacketDelivered(Origin origin, address receiver); event LzReceiveAlert( address indexed receiver, address indexed executor, Origin origin, bytes32 guid, uint256 gas, uint256 value, bytes message, bytes extraData, bytes reason ); event LzTokenSet(address token); event DelegateSet(address sender, address delegate); function quote(MessagingParams calldata _params, address _sender) external view returns (MessagingFee memory); function send( MessagingParams calldata _params, address _refundAddress ) external payable returns (MessagingReceipt memory); function verify(Origin calldata _origin, address _receiver, bytes32 _payloadHash) external; function verifiable(Origin calldata _origin, address _receiver) external view returns (bool); function initializable(Origin calldata _origin, address _receiver) external view returns (bool); function lzReceive( Origin calldata _origin, address _receiver, bytes32 _guid, bytes calldata _message, bytes calldata _extraData ) external payable; // oapp can burn messages partially by calling this function with its own business logic if messages are verified in order function clear(address _oapp, Origin calldata _origin, bytes32 _guid, bytes calldata _message) external; function setLzToken(address _lzToken) external; function lzToken() external view returns (address); function nativeToken() external view returns (address); function setDelegate(address _delegate) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol"; import { SetConfigParam } from "./IMessageLibManager.sol"; enum MessageLibType { Send, Receive, SendAndReceive } interface IMessageLib is IERC165 { function setConfig(address _oapp, SetConfigParam[] calldata _config) external; function getConfig(uint32 _eid, address _oapp, uint32 _configType) external view returns (bytes memory config); function isSupportedEid(uint32 _eid) external view returns (bool); // message libs of same major version are compatible function version() external view returns (uint64 major, uint8 minor, uint8 endpointVersion); function messageLibType() external view returns (MessageLibType); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; struct SetConfigParam { uint32 eid; uint32 configType; bytes config; } interface IMessageLibManager { struct Timeout { address lib; uint256 expiry; } event LibraryRegistered(address newLib); event DefaultSendLibrarySet(uint32 eid, address newLib); event DefaultReceiveLibrarySet(uint32 eid, address newLib); event DefaultReceiveLibraryTimeoutSet(uint32 eid, address oldLib, uint256 expiry); event SendLibrarySet(address sender, uint32 eid, address newLib); event ReceiveLibrarySet(address receiver, uint32 eid, address newLib); event ReceiveLibraryTimeoutSet(address receiver, uint32 eid, address oldLib, uint256 timeout); function registerLibrary(address _lib) external; function isRegisteredLibrary(address _lib) external view returns (bool); function getRegisteredLibraries() external view returns (address[] memory); function setDefaultSendLibrary(uint32 _eid, address _newLib) external; function defaultSendLibrary(uint32 _eid) external view returns (address); function setDefaultReceiveLibrary(uint32 _eid, address _newLib, uint256 _timeout) external; function defaultReceiveLibrary(uint32 _eid) external view returns (address); function setDefaultReceiveLibraryTimeout(uint32 _eid, address _lib, uint256 _expiry) external; function defaultReceiveLibraryTimeout(uint32 _eid) external view returns (address lib, uint256 expiry); function isSupportedEid(uint32 _eid) external view returns (bool); function isValidReceiveLibrary(address _receiver, uint32 _eid, address _lib) external view returns (bool); /// ------------------- OApp interfaces ------------------- function setSendLibrary(address _oapp, uint32 _eid, address _newLib) external; function getSendLibrary(address _sender, uint32 _eid) external view returns (address lib); function isDefaultSendLibrary(address _sender, uint32 _eid) external view returns (bool); function setReceiveLibrary(address _oapp, uint32 _eid, address _newLib, uint256 _gracePeriod) external; function getReceiveLibrary(address _receiver, uint32 _eid) external view returns (address lib, bool isDefault); function setReceiveLibraryTimeout(address _oapp, uint32 _eid, address _lib, uint256 _gracePeriod) external; function receiveLibraryTimeout(address _receiver, uint32 _eid) external view returns (address lib, uint256 expiry); function setConfig(address _oapp, address _lib, SetConfigParam[] calldata _params) external; function getConfig( address _oapp, address _lib, uint32 _eid, uint32 _configType ) external view returns (bytes memory config); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingChannel { event InboundNonceSkipped(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce); event PacketNilified(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); event PacketBurnt(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); function eid() external view returns (uint32); // this is an emergency function if a message cannot be verified for some reasons // required to provide _nextNonce to avoid race condition function skip(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce) external; function nilify(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function burn(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function nextGuid(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (bytes32); function inboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); function outboundNonce(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (uint64); function inboundPayloadHash( address _receiver, uint32 _srcEid, bytes32 _sender, uint64 _nonce ) external view returns (bytes32); function lazyInboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingComposer { event ComposeSent(address from, address to, bytes32 guid, uint16 index, bytes message); event ComposeDelivered(address from, address to, bytes32 guid, uint16 index); event LzComposeAlert( address indexed from, address indexed to, address indexed executor, bytes32 guid, uint16 index, uint256 gas, uint256 value, bytes message, bytes extraData, bytes reason ); function composeQueue( address _from, address _to, bytes32 _guid, uint16 _index ) external view returns (bytes32 messageHash); function sendCompose(address _to, bytes32 _guid, uint16 _index, bytes calldata _message) external; function lzCompose( address _from, address _to, bytes32 _guid, uint16 _index, bytes calldata _message, bytes calldata _extraData ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingContext { function isSendingMessage() external view returns (bool); function getSendContext() external view returns (uint32 dstEid, address sender); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { MessagingFee } from "./ILayerZeroEndpointV2.sol"; import { IMessageLib } from "./IMessageLib.sol"; struct Packet { uint64 nonce; uint32 srcEid; address sender; uint32 dstEid; bytes32 receiver; bytes32 guid; bytes message; } interface ISendLib is IMessageLib { function send( Packet calldata _packet, bytes calldata _options, bool _payInLzToken ) external returns (MessagingFee memory, bytes memory encodedPacket); function quote( Packet calldata _packet, bytes calldata _options, bool _payInLzToken ) external view returns (MessagingFee memory); function setTreasury(address _treasury) external; function withdrawFee(address _to, uint256 _amount) external; function withdrawLzTokenFee(address _lzToken, address _to, uint256 _amount) external; }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; library AddressCast { error AddressCast_InvalidSizeForAddress(); error AddressCast_InvalidAddress(); function toBytes32(bytes calldata _addressBytes) internal pure returns (bytes32 result) { if (_addressBytes.length > 32) revert AddressCast_InvalidAddress(); result = bytes32(_addressBytes); unchecked { uint256 offset = 32 - _addressBytes.length; result = result >> (offset * 8); } } function toBytes32(address _address) internal pure returns (bytes32 result) { result = bytes32(uint256(uint160(_address))); } function toBytes(bytes32 _addressBytes32, uint256 _size) internal pure returns (bytes memory result) { if (_size == 0 || _size > 32) revert AddressCast_InvalidSizeForAddress(); result = new bytes(_size); unchecked { uint256 offset = 256 - _size * 8; assembly { mstore(add(result, 32), shl(offset, _addressBytes32)) } } } function toAddress(bytes32 _addressBytes32) internal pure returns (address result) { result = address(uint160(uint256(_addressBytes32))); } function toAddress(bytes calldata _addressBytes) internal pure returns (address result) { if (_addressBytes.length != 20) revert AddressCast_InvalidAddress(); result = address(bytes20(_addressBytes)); } }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { Packet } from "../../interfaces/ISendLib.sol"; import { AddressCast } from "../../libs/AddressCast.sol"; library PacketV1Codec { using AddressCast for address; using AddressCast for bytes32; uint8 internal constant PACKET_VERSION = 1; // header (version + nonce + path) // version uint256 private constant PACKET_VERSION_OFFSET = 0; // nonce uint256 private constant NONCE_OFFSET = 1; // path uint256 private constant SRC_EID_OFFSET = 9; uint256 private constant SENDER_OFFSET = 13; uint256 private constant DST_EID_OFFSET = 45; uint256 private constant RECEIVER_OFFSET = 49; // payload (guid + message) uint256 private constant GUID_OFFSET = 81; // keccak256(nonce + path) uint256 private constant MESSAGE_OFFSET = 113; function encode(Packet memory _packet) internal pure returns (bytes memory encodedPacket) { encodedPacket = abi.encodePacked( PACKET_VERSION, _packet.nonce, _packet.srcEid, _packet.sender.toBytes32(), _packet.dstEid, _packet.receiver, _packet.guid, _packet.message ); } function encodePacketHeader(Packet memory _packet) internal pure returns (bytes memory) { return abi.encodePacked( PACKET_VERSION, _packet.nonce, _packet.srcEid, _packet.sender.toBytes32(), _packet.dstEid, _packet.receiver ); } function encodePayload(Packet memory _packet) internal pure returns (bytes memory) { return abi.encodePacked(_packet.guid, _packet.message); } function header(bytes calldata _packet) internal pure returns (bytes calldata) { return _packet[0:GUID_OFFSET]; } function version(bytes calldata _packet) internal pure returns (uint8) { return uint8(bytes1(_packet[PACKET_VERSION_OFFSET:NONCE_OFFSET])); } function nonce(bytes calldata _packet) internal pure returns (uint64) { return uint64(bytes8(_packet[NONCE_OFFSET:SRC_EID_OFFSET])); } function srcEid(bytes calldata _packet) internal pure returns (uint32) { return uint32(bytes4(_packet[SRC_EID_OFFSET:SENDER_OFFSET])); } function sender(bytes calldata _packet) internal pure returns (bytes32) { return bytes32(_packet[SENDER_OFFSET:DST_EID_OFFSET]); } function senderAddressB20(bytes calldata _packet) internal pure returns (address) { return sender(_packet).toAddress(); } function dstEid(bytes calldata _packet) internal pure returns (uint32) { return uint32(bytes4(_packet[DST_EID_OFFSET:RECEIVER_OFFSET])); } function receiver(bytes calldata _packet) internal pure returns (bytes32) { return bytes32(_packet[RECEIVER_OFFSET:GUID_OFFSET]); } function receiverB20(bytes calldata _packet) internal pure returns (address) { return receiver(_packet).toAddress(); } function guid(bytes calldata _packet) internal pure returns (bytes32) { return bytes32(_packet[GUID_OFFSET:MESSAGE_OFFSET]); } function message(bytes calldata _packet) internal pure returns (bytes calldata) { return bytes(_packet[MESSAGE_OFFSET:]); } function payload(bytes calldata _packet) internal pure returns (bytes calldata) { return bytes(_packet[GUID_OFFSET:]); } function payloadHash(bytes calldata _packet) internal pure returns (bytes32) { return keccak256(payload(_packet)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * 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); } }
// 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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; /// @dev simply a container of endpoint address and local eid abstract contract MessageLibBase { address internal immutable endpoint; uint32 internal immutable localEid; error LZ_MessageLib_OnlyEndpoint(); modifier onlyEndpoint() { if (endpoint != msg.sender) revert LZ_MessageLib_OnlyEndpoint(); _; } constructor(address _endpoint, uint32 _localEid) { endpoint = _endpoint; localEid = _localEid; } }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol"; import { ERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import { ILayerZeroEndpointV2, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol"; import { IMessageLib, MessageLibType } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLib.sol"; import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol"; import { MessageLibBase } from "./MessageLibBase.sol"; /// @dev receive-side message library base contract on endpoint v2. /// it does not have the complication as the one of endpoint v1, such as nonce, executor whitelist, etc. abstract contract ReceiveLibBaseE2 is MessageLibBase, ERC165, IMessageLib { using PacketV1Codec for bytes; constructor(address _endpoint) MessageLibBase(_endpoint, ILayerZeroEndpointV2(_endpoint).eid()) {} function supportsInterface(bytes4 _interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return _interfaceId == type(IMessageLib).interfaceId || super.supportsInterface(_interfaceId); } function messageLibType() external pure virtual override returns (MessageLibType) { return MessageLibType.Receive; } }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol"; import { UlnBase, UlnConfig } from "./UlnBase.sol"; struct Verification { bool submitted; uint64 confirmations; } /// @dev includes the utility functions for checking ULN states and logics abstract contract ReceiveUlnBase is UlnBase { using PacketV1Codec for bytes; mapping(bytes32 headerHash => mapping(bytes32 payloadHash => mapping(address dvn => Verification))) public hashLookup; event PayloadVerified(address dvn, bytes header, uint256 confirmations, bytes32 proofHash); error LZ_ULN_InvalidPacketHeader(); error LZ_ULN_InvalidPacketVersion(); error LZ_ULN_InvalidEid(); error LZ_ULN_Verifying(); // ============================ External =================================== function verifiable( UlnConfig memory _config, bytes32 _headerHash, bytes32 _payloadHash ) external view returns (bool) { return _checkVerifiable(_config, _headerHash, _payloadHash); } function assertHeader(bytes calldata _packetHeader, uint32 _localEid) external pure { _assertHeader(_packetHeader, _localEid); } // ============================ Internal =================================== /// @dev per DVN signing function function _verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations) internal { hashLookup[keccak256(_packetHeader)][_payloadHash][msg.sender] = Verification(true, _confirmations); emit PayloadVerified(msg.sender, _packetHeader, _confirmations, _payloadHash); } function _verified( address _dvn, bytes32 _headerHash, bytes32 _payloadHash, uint64 _requiredConfirmation ) internal view returns (bool verified) { Verification memory verification = hashLookup[_headerHash][_payloadHash][_dvn]; // return true if the dvn has signed enough confirmations verified = verification.submitted && verification.confirmations >= _requiredConfirmation; } function _verifyAndReclaimStorage(UlnConfig memory _config, bytes32 _headerHash, bytes32 _payloadHash) internal { if (!_checkVerifiable(_config, _headerHash, _payloadHash)) { revert LZ_ULN_Verifying(); } // iterate the required DVNs if (_config.requiredDVNCount > 0) { for (uint8 i = 0; i < _config.requiredDVNCount; ++i) { delete hashLookup[_headerHash][_payloadHash][_config.requiredDVNs[i]]; } } // iterate the optional DVNs if (_config.optionalDVNCount > 0) { for (uint8 i = 0; i < _config.optionalDVNCount; ++i) { delete hashLookup[_headerHash][_payloadHash][_config.optionalDVNs[i]]; } } } function _assertHeader(bytes calldata _packetHeader, uint32 _localEid) internal pure { // assert packet header is of right size 81 if (_packetHeader.length != 81) revert LZ_ULN_InvalidPacketHeader(); // assert packet header version is the same as ULN if (_packetHeader.version() != PacketV1Codec.PACKET_VERSION) revert LZ_ULN_InvalidPacketVersion(); // assert the packet is for this endpoint if (_packetHeader.dstEid() != _localEid) revert LZ_ULN_InvalidEid(); } /// @dev for verifiable view function /// @dev checks if this verification is ready to be committed to the endpoint function _checkVerifiable( UlnConfig memory _config, bytes32 _headerHash, bytes32 _payloadHash ) internal view returns (bool) { // iterate the required DVNs if (_config.requiredDVNCount > 0) { for (uint8 i = 0; i < _config.requiredDVNCount; ++i) { if (!_verified(_config.requiredDVNs[i], _headerHash, _payloadHash, _config.confirmations)) { // return if any of the required DVNs haven't signed return false; } } if (_config.optionalDVNCount == 0) { // returns early if all required DVNs have signed and there are no optional DVNs return true; } } // then it must require optional validations uint8 threshold = _config.optionalDVNThreshold; for (uint8 i = 0; i < _config.optionalDVNCount; ++i) { if (_verified(_config.optionalDVNs[i], _headerHash, _payloadHash, _config.confirmations)) { // increment the optional count if the optional DVN has signed threshold--; if (threshold == 0) { // early return if the optional threshold has hit return true; } } } // return false as a catch-all return false; } }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; // the formal properties are documented in the setter functions struct UlnConfig { uint64 confirmations; // we store the length of required DVNs and optional DVNs instead of using DVN.length directly to save gas uint8 requiredDVNCount; // 0 indicate DEFAULT, NIL_DVN_COUNT indicate NONE (to override the value of default) uint8 optionalDVNCount; // 0 indicate DEFAULT, NIL_DVN_COUNT indicate NONE (to override the value of default) uint8 optionalDVNThreshold; // (0, optionalDVNCount] address[] requiredDVNs; // no duplicates. sorted an an ascending order. allowed overlap with optionalDVNs address[] optionalDVNs; // no duplicates. sorted an an ascending order. allowed overlap with requiredDVNs } struct SetDefaultUlnConfigParam { uint32 eid; UlnConfig config; } /// @dev includes the utility functions for checking ULN states and logics abstract contract UlnBase is Ownable { address private constant DEFAULT_CONFIG = address(0); // reserved values for uint8 internal constant DEFAULT = 0; uint8 internal constant NIL_DVN_COUNT = type(uint8).max; uint64 internal constant NIL_CONFIRMATIONS = type(uint64).max; // 127 to prevent total number of DVNs (127 * 2) exceeding uint8.max (255) // by limiting the total size, it would help constraint the design of DVNOptions uint8 private constant MAX_COUNT = (type(uint8).max - 1) / 2; mapping(address oapp => mapping(uint32 eid => UlnConfig)) internal ulnConfigs; error LZ_ULN_Unsorted(); error LZ_ULN_InvalidRequiredDVNCount(); error LZ_ULN_InvalidOptionalDVNCount(); error LZ_ULN_AtLeastOneDVN(); error LZ_ULN_InvalidOptionalDVNThreshold(); error LZ_ULN_InvalidConfirmations(); error LZ_ULN_UnsupportedEid(uint32 eid); event DefaultUlnConfigsSet(SetDefaultUlnConfigParam[] params); event UlnConfigSet(address oapp, uint32 eid, UlnConfig config); // ============================ OnlyOwner =================================== /// @dev about the DEFAULT ULN config /// 1) its values are all LITERAL (e.g. 0 is 0). whereas in the oapp ULN config, 0 (default value) points to the default ULN config /// this design enables the oapp to point to DEFAULT config without explicitly setting the config /// 2) its configuration is more restrictive than the oapp ULN config that /// a) it must not use NIL value, where NIL is used only by oapps to indicate the LITERAL 0 /// b) it must have at least one DVN function setDefaultUlnConfigs(SetDefaultUlnConfigParam[] calldata _params) external onlyOwner { for (uint256 i = 0; i < _params.length; ++i) { SetDefaultUlnConfigParam calldata param = _params[i]; // 2.a must not use NIL if (param.config.requiredDVNCount == NIL_DVN_COUNT) revert LZ_ULN_InvalidRequiredDVNCount(); if (param.config.optionalDVNCount == NIL_DVN_COUNT) revert LZ_ULN_InvalidOptionalDVNCount(); if (param.config.confirmations == NIL_CONFIRMATIONS) revert LZ_ULN_InvalidConfirmations(); // 2.b must have at least one dvn _assertAtLeastOneDVN(param.config); _setConfig(DEFAULT_CONFIG, param.eid, param.config); } emit DefaultUlnConfigsSet(_params); } // ============================ View =================================== // @dev assuming most oapps use default, we get default as memory and custom as storage to save gas function getUlnConfig(address _oapp, uint32 _remoteEid) public view returns (UlnConfig memory rtnConfig) { UlnConfig storage defaultConfig = ulnConfigs[DEFAULT_CONFIG][_remoteEid]; UlnConfig storage customConfig = ulnConfigs[_oapp][_remoteEid]; // if confirmations is 0, use default uint64 confirmations = customConfig.confirmations; if (confirmations == DEFAULT) { rtnConfig.confirmations = defaultConfig.confirmations; } else if (confirmations != NIL_CONFIRMATIONS) { // if confirmations is uint64.max, no block confirmations required rtnConfig.confirmations = confirmations; } // else do nothing, rtnConfig.confirmation is 0 if (customConfig.requiredDVNCount == DEFAULT) { if (defaultConfig.requiredDVNCount > 0) { // copy only if count > 0. save gas rtnConfig.requiredDVNs = defaultConfig.requiredDVNs; rtnConfig.requiredDVNCount = defaultConfig.requiredDVNCount; } // else, do nothing } else { if (customConfig.requiredDVNCount != NIL_DVN_COUNT) { rtnConfig.requiredDVNs = customConfig.requiredDVNs; rtnConfig.requiredDVNCount = customConfig.requiredDVNCount; } // else, do nothing } if (customConfig.optionalDVNCount == DEFAULT) { if (defaultConfig.optionalDVNCount > 0) { // copy only if count > 0. save gas rtnConfig.optionalDVNs = defaultConfig.optionalDVNs; rtnConfig.optionalDVNCount = defaultConfig.optionalDVNCount; rtnConfig.optionalDVNThreshold = defaultConfig.optionalDVNThreshold; } } else { if (customConfig.optionalDVNCount != NIL_DVN_COUNT) { rtnConfig.optionalDVNs = customConfig.optionalDVNs; rtnConfig.optionalDVNCount = customConfig.optionalDVNCount; rtnConfig.optionalDVNThreshold = customConfig.optionalDVNThreshold; } } // the final value must have at least one dvn // it is possible that some default config result into 0 dvns _assertAtLeastOneDVN(rtnConfig); } /// @dev Get the uln config without the default config for the given remoteEid. function getAppUlnConfig(address _oapp, uint32 _remoteEid) external view returns (UlnConfig memory) { return ulnConfigs[_oapp][_remoteEid]; } // ============================ Internal =================================== function _setUlnConfig(uint32 _remoteEid, address _oapp, UlnConfig memory _param) internal { _setConfig(_oapp, _remoteEid, _param); // get ULN config again as a catch all to ensure the config is valid getUlnConfig(_oapp, _remoteEid); emit UlnConfigSet(_oapp, _remoteEid, _param); } /// @dev a supported Eid must have a valid default uln config, which has at least one dvn function _isSupportedEid(uint32 _remoteEid) internal view returns (bool) { UlnConfig storage defaultConfig = ulnConfigs[DEFAULT_CONFIG][_remoteEid]; return defaultConfig.requiredDVNCount > 0 || defaultConfig.optionalDVNThreshold > 0; } function _assertSupportedEid(uint32 _remoteEid) internal view { if (!_isSupportedEid(_remoteEid)) revert LZ_ULN_UnsupportedEid(_remoteEid); } // ============================ Private =================================== function _assertAtLeastOneDVN(UlnConfig memory _config) private pure { if (_config.requiredDVNCount == 0 && _config.optionalDVNThreshold == 0) revert LZ_ULN_AtLeastOneDVN(); } /// @dev this private function is used in both setDefaultUlnConfigs and setUlnConfig function _setConfig(address _oapp, uint32 _eid, UlnConfig memory _param) private { // @dev required dvns // if dvnCount == NONE, dvns list must be empty // if dvnCount == DEFAULT, dvn list must be empty // otherwise, dvnList.length == dvnCount and assert the list is valid if (_param.requiredDVNCount == NIL_DVN_COUNT || _param.requiredDVNCount == DEFAULT) { if (_param.requiredDVNs.length != 0) revert LZ_ULN_InvalidRequiredDVNCount(); } else { if (_param.requiredDVNs.length != _param.requiredDVNCount || _param.requiredDVNCount > MAX_COUNT) revert LZ_ULN_InvalidRequiredDVNCount(); _assertNoDuplicates(_param.requiredDVNs); } // @dev optional dvns // if optionalDVNCount == NONE, optionalDVNs list must be empty and threshold must be 0 // if optionalDVNCount == DEFAULT, optionalDVNs list must be empty and threshold must be 0 // otherwise, optionalDVNs.length == optionalDVNCount, threshold > 0 && threshold <= optionalDVNCount and assert the list is valid // example use case: an oapp uses the DEFAULT 'required' but // a) use a custom 1/1 dvn (practically a required dvn), or // b) use a custom 2/3 dvn if (_param.optionalDVNCount == NIL_DVN_COUNT || _param.optionalDVNCount == DEFAULT) { if (_param.optionalDVNs.length != 0) revert LZ_ULN_InvalidOptionalDVNCount(); if (_param.optionalDVNThreshold != 0) revert LZ_ULN_InvalidOptionalDVNThreshold(); } else { if (_param.optionalDVNs.length != _param.optionalDVNCount || _param.optionalDVNCount > MAX_COUNT) revert LZ_ULN_InvalidOptionalDVNCount(); if (_param.optionalDVNThreshold == 0 || _param.optionalDVNThreshold > _param.optionalDVNCount) revert LZ_ULN_InvalidOptionalDVNThreshold(); _assertNoDuplicates(_param.optionalDVNs); } // don't assert valid count here, as it needs to be validated along side default config ulnConfigs[_oapp][_eid] = _param; } function _assertNoDuplicates(address[] memory _dvns) private pure { address lastDVN = address(0); for (uint256 i = 0; i < _dvns.length; i++) { address dvn = _dvns[i]; if (dvn <= lastDVN) revert LZ_ULN_Unsorted(); // to ensure no duplicates lastDVN = dvn; } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; /// @dev should be implemented by the ReceiveUln302 contract and future ReceiveUln contracts on EndpointV2 interface IReceiveUlnE2 { /// @notice for each dvn to verify the payload /// @dev this function signature 0x0223536e function verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations) external; /// @notice verify the payload at endpoint, will check if all DVNs verified function commitVerification(bytes calldata _packetHeader, bytes32 _payloadHash) external; }
{ "evmVersion": "paris", "optimizer": { "enabled": true, "runs": 20000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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UlnConfig","name":"_config","type":"tuple"},{"internalType":"bytes32","name":"_headerHash","type":"bytes32"},{"internalType":"bytes32","name":"_payloadHash","type":"bytes32"}],"name":"verifiable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"_packetHeader","type":"bytes"},{"internalType":"bytes32","name":"_payloadHash","type":"bytes32"},{"internalType":"uint64","name":"_confirmations","type":"uint64"}],"name":"verify","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint64","name":"major","type":"uint64"},{"internalType":"uint8","name":"minor","type":"uint8"},{"internalType":"uint8","name":"endpointVersion","type":"uint8"}],"stateMutability":"pure","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000001a44076050125825900e736c501f859c50fe728c
-----Decoded View---------------
Arg [0] : _endpoint (address): 0x1a44076050125825900e736c501f859c50fE728c
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000001a44076050125825900e736c501f859c50fe728c
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.