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Latest 25 from a total of 306 transactions
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Send | 21470309 | 18 hrs ago | IN | 0.00017111 ETH | 0.00173899 | ||||
Send | 21470196 | 19 hrs ago | IN | 0.00017144 ETH | 0.0013153 | ||||
Send | 21468746 | 24 hrs ago | IN | 0.00018245 ETH | 0.00263013 | ||||
Send | 21467805 | 27 hrs ago | IN | 0.00017617 ETH | 0.0058492 | ||||
Send | 21466994 | 30 hrs ago | IN | 0.00017148 ETH | 0.00326005 | ||||
Send | 21462570 | 44 hrs ago | IN | 0.00017169 ETH | 0.00162704 | ||||
Send | 21462183 | 46 hrs ago | IN | 0.00013508 ETH | 0.00148241 | ||||
Send | 21462180 | 46 hrs ago | IN | 0.00017095 ETH | 0.00136998 | ||||
Send | 21461914 | 47 hrs ago | IN | 0.00013508 ETH | 0.00140389 | ||||
Send | 21461514 | 2 days ago | IN | 0.00017106 ETH | 0.0013651 | ||||
Send | 21458619 | 2 days ago | IN | 0.00017097 ETH | 0.00237172 | ||||
Send | 21457372 | 2 days ago | IN | 0.00017121 ETH | 0.00280721 | ||||
Send | 21457358 | 2 days ago | IN | 0.00017121 ETH | 0.00253271 | ||||
Send | 21456931 | 2 days ago | IN | 0.00002116 ETH | 0.00197889 | ||||
Send | 21456669 | 2 days ago | IN | 0.0001228 ETH | 0.00163358 | ||||
Send | 21455835 | 2 days ago | IN | 0.00017142 ETH | 0.00178722 | ||||
Send | 21455480 | 2 days ago | IN | 0.00002116 ETH | 0.00168187 | ||||
Send | 21455297 | 2 days ago | IN | 0.00002116 ETH | 0.00201052 | ||||
Send | 21455129 | 2 days ago | IN | 0.00040838 ETH | 0.00194051 | ||||
Send | 21454953 | 2 days ago | IN | 0.00018224 ETH | 0.00184064 | ||||
Send | 21452091 | 3 days ago | IN | 0.00024732 ETH | 0.00235183 | ||||
Send | 21451869 | 3 days ago | IN | 0.00002116 ETH | 0.00240533 | ||||
Send | 21450673 | 3 days ago | IN | 0.00002116 ETH | 0.00237689 | ||||
Send | 21450550 | 3 days ago | IN | 0.00002116 ETH | 0.00220091 | ||||
Send | 21449267 | 3 days ago | IN | 0.00017102 ETH | 0.00287377 |
Latest 25 internal transactions (View All)
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21470309 | 18 hrs ago | 0.00017111 ETH | ||||
21470196 | 19 hrs ago | 0.00017144 ETH | ||||
21468746 | 24 hrs ago | 0.00018245 ETH | ||||
21467805 | 27 hrs ago | 0.00017617 ETH | ||||
21466994 | 30 hrs ago | 0.00017148 ETH | ||||
21462570 | 44 hrs ago | 0.00017169 ETH | ||||
21462183 | 46 hrs ago | 0.00013508 ETH | ||||
21462180 | 46 hrs ago | 0.00017095 ETH | ||||
21461914 | 47 hrs ago | 0.00013508 ETH | ||||
21461514 | 2 days ago | 0.00017106 ETH | ||||
21458619 | 2 days ago | 0.00017097 ETH | ||||
21457372 | 2 days ago | 0.00017121 ETH | ||||
21457358 | 2 days ago | 0.00017121 ETH | ||||
21456931 | 2 days ago | 0.00002116 ETH | ||||
21456669 | 2 days ago | 0.0001228 ETH | ||||
21455835 | 2 days ago | 0.00017142 ETH | ||||
21455480 | 2 days ago | 0.00002116 ETH | ||||
21455297 | 2 days ago | 0.00002116 ETH | ||||
21455129 | 2 days ago | 0.00040838 ETH | ||||
21454953 | 2 days ago | 0.00018224 ETH | ||||
21452091 | 3 days ago | 0.00024732 ETH | ||||
21451869 | 3 days ago | 0.00002116 ETH | ||||
21450673 | 3 days ago | 0.00002116 ETH | ||||
21450550 | 3 days ago | 0.00002116 ETH | ||||
21449267 | 3 days ago | 0.00017102 ETH |
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Contract Name:
WBTCOFTAdapter
Compiler Version
v0.8.22+commit.4fc1097e
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.22; import { OFTFeeAdapter } from "./OFTFeeAdapter.sol"; contract WBTCOFTAdapter is OFTFeeAdapter { constructor(address _token, address _lzEndpoint, address _owner) OFTFeeAdapter(_token, _lzEndpoint, _owner) {} function sharedDecimals() public pure override returns (uint8) { return 8; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; // @dev Import the 'MessagingFee' and 'MessagingReceipt' so it's exposed to OApp implementers // solhint-disable-next-line no-unused-import import { OAppSender, MessagingFee, MessagingReceipt } from "./OAppSender.sol"; // @dev Import the 'Origin' so it's exposed to OApp implementers // solhint-disable-next-line no-unused-import import { OAppReceiver, Origin } from "./OAppReceiver.sol"; import { OAppCore } from "./OAppCore.sol"; /** * @title OApp * @dev Abstract contract serving as the base for OApp implementation, combining OAppSender and OAppReceiver functionality. */ abstract contract OApp is OAppSender, OAppReceiver { /** * @dev Constructor to initialize the OApp with the provided endpoint and owner. * @param _endpoint The address of the LOCAL LayerZero endpoint. * @param _delegate The delegate capable of making OApp configurations inside of the endpoint. */ constructor(address _endpoint, address _delegate) OAppCore(_endpoint, _delegate) {} /** * @notice Retrieves the OApp version information. * @return senderVersion The version of the OAppSender.sol implementation. * @return receiverVersion The version of the OAppReceiver.sol implementation. */ function oAppVersion() public pure virtual override(OAppSender, OAppReceiver) returns (uint64 senderVersion, uint64 receiverVersion) { return (SENDER_VERSION, RECEIVER_VERSION); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { IOAppCore, ILayerZeroEndpointV2 } from "./interfaces/IOAppCore.sol"; /** * @title OAppCore * @dev Abstract contract implementing the IOAppCore interface with basic OApp configurations. */ abstract contract OAppCore is IOAppCore, Ownable { // The LayerZero endpoint associated with the given OApp ILayerZeroEndpointV2 public immutable endpoint; // Mapping to store peers associated with corresponding endpoints mapping(uint32 eid => bytes32 peer) public peers; /** * @dev Constructor to initialize the OAppCore with the provided endpoint and delegate. * @param _endpoint The address of the LOCAL Layer Zero endpoint. * @param _delegate The delegate capable of making OApp configurations inside of the endpoint. * * @dev The delegate typically should be set as the owner of the contract. */ constructor(address _endpoint, address _delegate) { endpoint = ILayerZeroEndpointV2(_endpoint); if (_delegate == address(0)) revert InvalidDelegate(); endpoint.setDelegate(_delegate); } /** * @notice Sets the peer address (OApp instance) for a corresponding endpoint. * @param _eid The endpoint ID. * @param _peer The address of the peer to be associated with the corresponding endpoint. * * @dev Only the owner/admin of the OApp can call this function. * @dev Indicates that the peer is trusted to send LayerZero messages to this OApp. * @dev Set this to bytes32(0) to remove the peer address. * @dev Peer is a bytes32 to accommodate non-evm chains. */ function setPeer(uint32 _eid, bytes32 _peer) public virtual onlyOwner { _setPeer(_eid, _peer); } /** * @notice Sets the peer address (OApp instance) for a corresponding endpoint. * @param _eid The endpoint ID. * @param _peer The address of the peer to be associated with the corresponding endpoint. * * @dev Indicates that the peer is trusted to send LayerZero messages to this OApp. * @dev Set this to bytes32(0) to remove the peer address. * @dev Peer is a bytes32 to accommodate non-evm chains. */ function _setPeer(uint32 _eid, bytes32 _peer) internal virtual { peers[_eid] = _peer; emit PeerSet(_eid, _peer); } /** * @notice Internal function to get the peer address associated with a specific endpoint; reverts if NOT set. * ie. the peer is set to bytes32(0). * @param _eid The endpoint ID. * @return peer The address of the peer associated with the specified endpoint. */ function _getPeerOrRevert(uint32 _eid) internal view virtual returns (bytes32) { bytes32 peer = peers[_eid]; if (peer == bytes32(0)) revert NoPeer(_eid); return peer; } /** * @notice Sets the delegate address for the OApp. * @param _delegate The address of the delegate to be set. * * @dev Only the owner/admin of the OApp can call this function. * @dev Provides the ability for a delegate to set configs, on behalf of the OApp, directly on the Endpoint contract. */ function setDelegate(address _delegate) public onlyOwner { endpoint.setDelegate(_delegate); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { IOAppReceiver, Origin } from "./interfaces/IOAppReceiver.sol"; import { OAppCore } from "./OAppCore.sol"; /** * @title OAppReceiver * @dev Abstract contract implementing the ILayerZeroReceiver interface and extending OAppCore for OApp receivers. */ abstract contract OAppReceiver is IOAppReceiver, OAppCore { // Custom error message for when the caller is not the registered endpoint/ error OnlyEndpoint(address addr); // @dev The version of the OAppReceiver implementation. // @dev Version is bumped when changes are made to this contract. uint64 internal constant RECEIVER_VERSION = 2; /** * @notice Retrieves the OApp version information. * @return senderVersion The version of the OAppSender.sol contract. * @return receiverVersion The version of the OAppReceiver.sol contract. * * @dev Providing 0 as the default for OAppSender version. Indicates that the OAppSender is not implemented. * ie. this is a RECEIVE only OApp. * @dev If the OApp uses both OAppSender and OAppReceiver, then this needs to be override returning the correct versions. */ function oAppVersion() public view virtual returns (uint64 senderVersion, uint64 receiverVersion) { return (0, RECEIVER_VERSION); } /** * @notice Indicates whether an address is an approved composeMsg sender to the Endpoint. * @dev _origin The origin information containing the source endpoint and sender address. * - srcEid: The source chain endpoint ID. * - sender: The sender address on the src chain. * - nonce: The nonce of the message. * @dev _message The lzReceive payload. * @param _sender The sender address. * @return isSender Is a valid sender. * * @dev Applications can optionally choose to implement separate composeMsg senders that are NOT the bridging layer. * @dev The default sender IS the OAppReceiver implementer. */ function isComposeMsgSender( Origin calldata /*_origin*/, bytes calldata /*_message*/, address _sender ) public view virtual returns (bool) { return _sender == address(this); } /** * @notice Checks if the path initialization is allowed based on the provided origin. * @param origin The origin information containing the source endpoint and sender address. * @return Whether the path has been initialized. * * @dev This indicates to the endpoint that the OApp has enabled msgs for this particular path to be received. * @dev This defaults to assuming if a peer has been set, its initialized. * Can be overridden by the OApp if there is other logic to determine this. */ function allowInitializePath(Origin calldata origin) public view virtual returns (bool) { return peers[origin.srcEid] == origin.sender; } /** * @notice Retrieves the next nonce for a given source endpoint and sender address. * @dev _srcEid The source endpoint ID. * @dev _sender The sender address. * @return nonce The next nonce. * * @dev The path nonce starts from 1. If 0 is returned it means that there is NO nonce ordered enforcement. * @dev Is required by the off-chain executor to determine the OApp expects msg execution is ordered. * @dev This is also enforced by the OApp. * @dev By default this is NOT enabled. ie. nextNonce is hardcoded to return 0. */ function nextNonce(uint32 /*_srcEid*/, bytes32 /*_sender*/) public view virtual returns (uint64 nonce) { return 0; } /** * @dev Entry point for receiving messages or packets from the endpoint. * @param _origin The origin information containing the source endpoint and sender address. * - srcEid: The source chain endpoint ID. * - sender: The sender address on the src chain. * - nonce: The nonce of the message. * @param _guid The unique identifier for the received LayerZero message. * @param _message The payload of the received message. * @param _executor The address of the executor for the received message. * @param _extraData Additional arbitrary data provided by the corresponding executor. * * @dev Entry point for receiving msg/packet from the LayerZero endpoint. */ function lzReceive( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) public payable virtual { // Ensures that only the endpoint can attempt to lzReceive() messages to this OApp. if (address(endpoint) != msg.sender) revert OnlyEndpoint(msg.sender); // Ensure that the sender matches the expected peer for the source endpoint. if (_getPeerOrRevert(_origin.srcEid) != _origin.sender) revert OnlyPeer(_origin.srcEid, _origin.sender); // Call the internal OApp implementation of lzReceive. _lzReceive(_origin, _guid, _message, _executor, _extraData); } /** * @dev Internal function to implement lzReceive logic without needing to copy the basic parameter validation. */ function _lzReceive( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) internal virtual; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { SafeERC20, IERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { MessagingParams, MessagingFee, MessagingReceipt } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol"; import { OAppCore } from "./OAppCore.sol"; /** * @title OAppSender * @dev Abstract contract implementing the OAppSender functionality for sending messages to a LayerZero endpoint. */ abstract contract OAppSender is OAppCore { using SafeERC20 for IERC20; // Custom error messages error NotEnoughNative(uint256 msgValue); error LzTokenUnavailable(); // @dev The version of the OAppSender implementation. // @dev Version is bumped when changes are made to this contract. uint64 internal constant SENDER_VERSION = 1; /** * @notice Retrieves the OApp version information. * @return senderVersion The version of the OAppSender.sol contract. * @return receiverVersion The version of the OAppReceiver.sol contract. * * @dev Providing 0 as the default for OAppReceiver version. Indicates that the OAppReceiver is not implemented. * ie. this is a SEND only OApp. * @dev If the OApp uses both OAppSender and OAppReceiver, then this needs to be override returning the correct versions */ function oAppVersion() public view virtual returns (uint64 senderVersion, uint64 receiverVersion) { return (SENDER_VERSION, 0); } /** * @dev Internal function to interact with the LayerZero EndpointV2.quote() for fee calculation. * @param _dstEid The destination endpoint ID. * @param _message The message payload. * @param _options Additional options for the message. * @param _payInLzToken Flag indicating whether to pay the fee in LZ tokens. * @return fee The calculated MessagingFee for the message. * - nativeFee: The native fee for the message. * - lzTokenFee: The LZ token fee for the message. */ function _quote( uint32 _dstEid, bytes memory _message, bytes memory _options, bool _payInLzToken ) internal view virtual returns (MessagingFee memory fee) { return endpoint.quote( MessagingParams(_dstEid, _getPeerOrRevert(_dstEid), _message, _options, _payInLzToken), address(this) ); } /** * @dev Internal function to interact with the LayerZero EndpointV2.send() for sending a message. * @param _dstEid The destination endpoint ID. * @param _message The message payload. * @param _options Additional options for the message. * @param _fee The calculated LayerZero fee for the message. * - nativeFee: The native fee. * - lzTokenFee: The lzToken fee. * @param _refundAddress The address to receive any excess fee values sent to the endpoint. * @return receipt The receipt for the sent message. * - guid: The unique identifier for the sent message. * - nonce: The nonce of the sent message. * - fee: The LayerZero fee incurred for the message. */ function _lzSend( uint32 _dstEid, bytes memory _message, bytes memory _options, MessagingFee memory _fee, address _refundAddress ) internal virtual returns (MessagingReceipt memory receipt) { // @dev Push corresponding fees to the endpoint, any excess is sent back to the _refundAddress from the endpoint. uint256 messageValue = _payNative(_fee.nativeFee); if (_fee.lzTokenFee > 0) _payLzToken(_fee.lzTokenFee); return // solhint-disable-next-line check-send-result endpoint.send{ value: messageValue }( MessagingParams(_dstEid, _getPeerOrRevert(_dstEid), _message, _options, _fee.lzTokenFee > 0), _refundAddress ); } /** * @dev Internal function to pay the native fee associated with the message. * @param _nativeFee The native fee to be paid. * @return nativeFee The amount of native currency paid. * * @dev If the OApp needs to initiate MULTIPLE LayerZero messages in a single transaction, * this will need to be overridden because msg.value would contain multiple lzFees. * @dev Should be overridden in the event the LayerZero endpoint requires a different native currency. * @dev Some EVMs use an ERC20 as a method for paying transactions/gasFees. * @dev The endpoint is EITHER/OR, ie. it will NOT support both types of native payment at a time. */ function _payNative(uint256 _nativeFee) internal virtual returns (uint256 nativeFee) { if (msg.value != _nativeFee) revert NotEnoughNative(msg.value); return _nativeFee; } /** * @dev Internal function to pay the LZ token fee associated with the message. * @param _lzTokenFee The LZ token fee to be paid. * * @dev If the caller is trying to pay in the specified lzToken, then the lzTokenFee is passed to the endpoint. * @dev Any excess sent, is passed back to the specified _refundAddress in the _lzSend(). */ function _payLzToken(uint256 _lzTokenFee) internal virtual { // @dev Cannot cache the token because it is not immutable in the endpoint. address lzToken = endpoint.lzToken(); if (lzToken == address(0)) revert LzTokenUnavailable(); // Pay LZ token fee by sending tokens to the endpoint. IERC20(lzToken).safeTransferFrom(msg.sender, address(endpoint), _lzTokenFee); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { ILayerZeroEndpointV2 } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol"; /** * @title IOAppCore */ interface IOAppCore { // Custom error messages error OnlyPeer(uint32 eid, bytes32 sender); error NoPeer(uint32 eid); error InvalidEndpointCall(); error InvalidDelegate(); // Event emitted when a peer (OApp) is set for a corresponding endpoint event PeerSet(uint32 eid, bytes32 peer); /** * @notice Retrieves the OApp version information. * @return senderVersion The version of the OAppSender.sol contract. * @return receiverVersion The version of the OAppReceiver.sol contract. */ function oAppVersion() external view returns (uint64 senderVersion, uint64 receiverVersion); /** * @notice Retrieves the LayerZero endpoint associated with the OApp. * @return iEndpoint The LayerZero endpoint as an interface. */ function endpoint() external view returns (ILayerZeroEndpointV2 iEndpoint); /** * @notice Retrieves the peer (OApp) associated with a corresponding endpoint. * @param _eid The endpoint ID. * @return peer The peer address (OApp instance) associated with the corresponding endpoint. */ function peers(uint32 _eid) external view returns (bytes32 peer); /** * @notice Sets the peer address (OApp instance) for a corresponding endpoint. * @param _eid The endpoint ID. * @param _peer The address of the peer to be associated with the corresponding endpoint. */ function setPeer(uint32 _eid, bytes32 _peer) external; /** * @notice Sets the delegate address for the OApp Core. * @param _delegate The address of the delegate to be set. */ function setDelegate(address _delegate) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; /** * @title IOAppMsgInspector * @dev Interface for the OApp Message Inspector, allowing examination of message and options contents. */ interface IOAppMsgInspector { // Custom error message for inspection failure error InspectionFailed(bytes message, bytes options); /** * @notice Allows the inspector to examine LayerZero message contents and optionally throw a revert if invalid. * @param _message The message payload to be inspected. * @param _options Additional options or parameters for inspection. * @return valid A boolean indicating whether the inspection passed (true) or failed (false). * * @dev Optionally done as a revert, OR use the boolean provided to handle the failure. */ function inspect(bytes calldata _message, bytes calldata _options) external view returns (bool valid); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; /** * @dev Struct representing enforced option parameters. */ struct EnforcedOptionParam { uint32 eid; // Endpoint ID uint16 msgType; // Message Type bytes options; // Additional options } /** * @title IOAppOptionsType3 * @dev Interface for the OApp with Type 3 Options, allowing the setting and combining of enforced options. */ interface IOAppOptionsType3 { // Custom error message for invalid options error InvalidOptions(bytes options); // Event emitted when enforced options are set event EnforcedOptionSet(EnforcedOptionParam[] _enforcedOptions); /** * @notice Sets enforced options for specific endpoint and message type combinations. * @param _enforcedOptions An array of EnforcedOptionParam structures specifying enforced options. */ function setEnforcedOptions(EnforcedOptionParam[] calldata _enforcedOptions) external; /** * @notice Combines options for a given endpoint and message type. * @param _eid The endpoint ID. * @param _msgType The OApp message type. * @param _extraOptions Additional options passed by the caller. * @return options The combination of caller specified options AND enforced options. */ function combineOptions( uint32 _eid, uint16 _msgType, bytes calldata _extraOptions ) external view returns (bytes memory options); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { ILayerZeroReceiver, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroReceiver.sol"; interface IOAppReceiver is ILayerZeroReceiver { /** * @notice Indicates whether an address is an approved composeMsg sender to the Endpoint. * @param _origin The origin information containing the source endpoint and sender address. * - srcEid: The source chain endpoint ID. * - sender: The sender address on the src chain. * - nonce: The nonce of the message. * @param _message The lzReceive payload. * @param _sender The sender address. * @return isSender Is a valid sender. * * @dev Applications can optionally choose to implement a separate composeMsg sender that is NOT the bridging layer. * @dev The default sender IS the OAppReceiver implementer. */ function isComposeMsgSender( Origin calldata _origin, bytes calldata _message, address _sender ) external view returns (bool isSender); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { IOAppOptionsType3, EnforcedOptionParam } from "../interfaces/IOAppOptionsType3.sol"; /** * @title OAppOptionsType3 * @dev Abstract contract implementing the IOAppOptionsType3 interface with type 3 options. */ abstract contract OAppOptionsType3 is IOAppOptionsType3, Ownable { uint16 internal constant OPTION_TYPE_3 = 3; // @dev The "msgType" should be defined in the child contract. mapping(uint32 eid => mapping(uint16 msgType => bytes enforcedOption)) public enforcedOptions; /** * @dev Sets the enforced options for specific endpoint and message type combinations. * @param _enforcedOptions An array of EnforcedOptionParam structures specifying enforced options. * * @dev Only the owner/admin of the OApp can call this function. * @dev Provides a way for the OApp to enforce things like paying for PreCrime, AND/OR minimum dst lzReceive gas amounts etc. * @dev These enforced options can vary as the potential options/execution on the remote may differ as per the msgType. * eg. Amount of lzReceive() gas necessary to deliver a lzCompose() message adds overhead you dont want to pay * if you are only making a standard LayerZero message ie. lzReceive() WITHOUT sendCompose(). */ function setEnforcedOptions(EnforcedOptionParam[] calldata _enforcedOptions) public virtual onlyOwner { _setEnforcedOptions(_enforcedOptions); } /** * @dev Sets the enforced options for specific endpoint and message type combinations. * @param _enforcedOptions An array of EnforcedOptionParam structures specifying enforced options. * * @dev Provides a way for the OApp to enforce things like paying for PreCrime, AND/OR minimum dst lzReceive gas amounts etc. * @dev These enforced options can vary as the potential options/execution on the remote may differ as per the msgType. * eg. Amount of lzReceive() gas necessary to deliver a lzCompose() message adds overhead you dont want to pay * if you are only making a standard LayerZero message ie. lzReceive() WITHOUT sendCompose(). */ function _setEnforcedOptions(EnforcedOptionParam[] memory _enforcedOptions) internal virtual { for (uint256 i = 0; i < _enforcedOptions.length; i++) { // @dev Enforced options are only available for optionType 3, as type 1 and 2 dont support combining. _assertOptionsType3(_enforcedOptions[i].options); enforcedOptions[_enforcedOptions[i].eid][_enforcedOptions[i].msgType] = _enforcedOptions[i].options; } emit EnforcedOptionSet(_enforcedOptions); } /** * @notice Combines options for a given endpoint and message type. * @param _eid The endpoint ID. * @param _msgType The OAPP message type. * @param _extraOptions Additional options passed by the caller. * @return options The combination of caller specified options AND enforced options. * * @dev If there is an enforced lzReceive option: * - {gasLimit: 200k, msg.value: 1 ether} AND a caller supplies a lzReceive option: {gasLimit: 100k, msg.value: 0.5 ether} * - The resulting options will be {gasLimit: 300k, msg.value: 1.5 ether} when the message is executed on the remote lzReceive() function. * @dev This presence of duplicated options is handled off-chain in the verifier/executor. */ function combineOptions( uint32 _eid, uint16 _msgType, bytes calldata _extraOptions ) public view virtual returns (bytes memory) { bytes memory enforced = enforcedOptions[_eid][_msgType]; // No enforced options, pass whatever the caller supplied, even if it's empty or legacy type 1/2 options. if (enforced.length == 0) return _extraOptions; // No caller options, return enforced if (_extraOptions.length == 0) return enforced; // @dev If caller provided _extraOptions, must be type 3 as its the ONLY type that can be combined. if (_extraOptions.length >= 2) { _assertOptionsType3(_extraOptions); // @dev Remove the first 2 bytes containing the type from the _extraOptions and combine with enforced. return bytes.concat(enforced, _extraOptions[2:]); } // No valid set of options was found. revert InvalidOptions(_extraOptions); } /** * @dev Internal function to assert that options are of type 3. * @param _options The options to be checked. */ function _assertOptionsType3(bytes memory _options) internal pure virtual { uint16 optionsType; assembly { optionsType := mload(add(_options, 2)) } if (optionsType != OPTION_TYPE_3) revert InvalidOptions(_options); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { IPreCrime } from "./interfaces/IPreCrime.sol"; import { IOAppPreCrimeSimulator, InboundPacket, Origin } from "./interfaces/IOAppPreCrimeSimulator.sol"; /** * @title OAppPreCrimeSimulator * @dev Abstract contract serving as the base for preCrime simulation functionality in an OApp. */ abstract contract OAppPreCrimeSimulator is IOAppPreCrimeSimulator, Ownable { // The address of the preCrime implementation. address public preCrime; /** * @dev Retrieves the address of the OApp contract. * @return The address of the OApp contract. * * @dev The simulator contract is the base contract for the OApp by default. * @dev If the simulator is a separate contract, override this function. */ function oApp() external view virtual returns (address) { return address(this); } /** * @dev Sets the preCrime contract address. * @param _preCrime The address of the preCrime contract. */ function setPreCrime(address _preCrime) public virtual onlyOwner { preCrime = _preCrime; emit PreCrimeSet(_preCrime); } /** * @dev Interface for pre-crime simulations. Always reverts at the end with the simulation results. * @param _packets An array of InboundPacket objects representing received packets to be delivered. * * @dev WARNING: MUST revert at the end with the simulation results. * @dev Gives the preCrime implementation the ability to mock sending packets to the lzReceive function, * WITHOUT actually executing them. */ function lzReceiveAndRevert(InboundPacket[] calldata _packets) public payable virtual { for (uint256 i = 0; i < _packets.length; i++) { InboundPacket calldata packet = _packets[i]; // Ignore packets that are not from trusted peers. if (!isPeer(packet.origin.srcEid, packet.origin.sender)) continue; // @dev Because a verifier is calling this function, it doesnt have access to executor params: // - address _executor // - bytes calldata _extraData // preCrime will NOT work for OApps that rely on these two parameters inside of their _lzReceive(). // They are instead stubbed to default values, address(0) and bytes("") // @dev Calling this.lzReceiveSimulate removes ability for assembly return 0 callstack exit, // which would cause the revert to be ignored. this.lzReceiveSimulate{ value: packet.value }( packet.origin, packet.guid, packet.message, packet.executor, packet.extraData ); } // @dev Revert with the simulation results. msg.sender must implement IPreCrime.buildSimulationResult(). revert SimulationResult(IPreCrime(msg.sender).buildSimulationResult()); } /** * @dev Is effectively an internal function because msg.sender must be address(this). * Allows resetting the call stack for 'internal' calls. * @param _origin The origin information containing the source endpoint and sender address. * - srcEid: The source chain endpoint ID. * - sender: The sender address on the src chain. * - nonce: The nonce of the message. * @param _guid The unique identifier of the packet. * @param _message The message payload of the packet. * @param _executor The executor address for the packet. * @param _extraData Additional data for the packet. */ function lzReceiveSimulate( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) external payable virtual { // @dev Ensure ONLY can be called 'internally'. if (msg.sender != address(this)) revert OnlySelf(); _lzReceiveSimulate(_origin, _guid, _message, _executor, _extraData); } /** * @dev Internal function to handle the OAppPreCrimeSimulator simulated receive. * @param _origin The origin information. * - srcEid: The source chain endpoint ID. * - sender: The sender address from the src chain. * - nonce: The nonce of the LayerZero message. * @param _guid The GUID of the LayerZero message. * @param _message The LayerZero message. * @param _executor The address of the off-chain executor. * @param _extraData Arbitrary data passed by the msg executor. * * @dev Enables the preCrime simulator to mock sending lzReceive() messages, * routes the msg down from the OAppPreCrimeSimulator, and back up to the OAppReceiver. */ function _lzReceiveSimulate( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) internal virtual; /** * @dev checks if the specified peer is considered 'trusted' by the OApp. * @param _eid The endpoint Id to check. * @param _peer The peer to check. * @return Whether the peer passed is considered 'trusted' by the OApp. */ function isPeer(uint32 _eid, bytes32 _peer) public view virtual returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; // @dev Import the Origin so it's exposed to OAppPreCrimeSimulator implementers. // solhint-disable-next-line no-unused-import import { InboundPacket, Origin } from "../libs/Packet.sol"; /** * @title IOAppPreCrimeSimulator Interface * @dev Interface for the preCrime simulation functionality in an OApp. */ interface IOAppPreCrimeSimulator { // @dev simulation result used in PreCrime implementation error SimulationResult(bytes result); error OnlySelf(); /** * @dev Emitted when the preCrime contract address is set. * @param preCrimeAddress The address of the preCrime contract. */ event PreCrimeSet(address preCrimeAddress); /** * @dev Retrieves the address of the preCrime contract implementation. * @return The address of the preCrime contract. */ function preCrime() external view returns (address); /** * @dev Retrieves the address of the OApp contract. * @return The address of the OApp contract. */ function oApp() external view returns (address); /** * @dev Sets the preCrime contract address. * @param _preCrime The address of the preCrime contract. */ function setPreCrime(address _preCrime) external; /** * @dev Mocks receiving a packet, then reverts with a series of data to infer the state/result. * @param _packets An array of LayerZero InboundPacket objects representing received packets. */ function lzReceiveAndRevert(InboundPacket[] calldata _packets) external payable; /** * @dev checks if the specified peer is considered 'trusted' by the OApp. * @param _eid The endpoint Id to check. * @param _peer The peer to check. * @return Whether the peer passed is considered 'trusted' by the OApp. */ function isPeer(uint32 _eid, bytes32 _peer) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; struct PreCrimePeer { uint32 eid; bytes32 preCrime; bytes32 oApp; } // TODO not done yet interface IPreCrime { error OnlyOffChain(); // for simulate() error PacketOversize(uint256 max, uint256 actual); error PacketUnsorted(); error SimulationFailed(bytes reason); // for preCrime() error SimulationResultNotFound(uint32 eid); error InvalidSimulationResult(uint32 eid, bytes reason); error CrimeFound(bytes crime); function getConfig(bytes[] calldata _packets, uint256[] calldata _packetMsgValues) external returns (bytes memory); function simulate( bytes[] calldata _packets, uint256[] calldata _packetMsgValues ) external payable returns (bytes memory); function buildSimulationResult() external view returns (bytes memory); function preCrime( bytes[] calldata _packets, uint256[] calldata _packetMsgValues, bytes[] calldata _simulations ) external; function version() external view returns (uint64 major, uint8 minor); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol"; import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol"; /** * @title InboundPacket * @dev Structure representing an inbound packet received by the contract. */ struct InboundPacket { Origin origin; // Origin information of the packet. uint32 dstEid; // Destination endpointId of the packet. address receiver; // Receiver address for the packet. bytes32 guid; // Unique identifier of the packet. uint256 value; // msg.value of the packet. address executor; // Executor address for the packet. bytes message; // Message payload of the packet. bytes extraData; // Additional arbitrary data for the packet. } /** * @title PacketDecoder * @dev Library for decoding LayerZero packets. */ library PacketDecoder { using PacketV1Codec for bytes; /** * @dev Decode an inbound packet from the given packet data. * @param _packet The packet data to decode. * @return packet An InboundPacket struct representing the decoded packet. */ function decode(bytes calldata _packet) internal pure returns (InboundPacket memory packet) { packet.origin = Origin(_packet.srcEid(), _packet.sender(), _packet.nonce()); packet.dstEid = _packet.dstEid(); packet.receiver = _packet.receiverB20(); packet.guid = _packet.guid(); packet.message = _packet.message(); } /** * @dev Decode multiple inbound packets from the given packet data and associated message values. * @param _packets An array of packet data to decode. * @param _packetMsgValues An array of associated message values for each packet. * @return packets An array of InboundPacket structs representing the decoded packets. */ function decode( bytes[] calldata _packets, uint256[] memory _packetMsgValues ) internal pure returns (InboundPacket[] memory packets) { packets = new InboundPacket[](_packets.length); for (uint256 i = 0; i < _packets.length; i++) { bytes calldata packet = _packets[i]; packets[i] = PacketDecoder.decode(packet); // @dev Allows the verifier to specify the msg.value that gets passed in lzReceive. packets[i].value = _packetMsgValues[i]; } } }
// 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 { Origin } from "./ILayerZeroEndpointV2.sol"; interface ILayerZeroReceiver { function allowInitializePath(Origin calldata _origin) external view returns (bool); function nextNonce(uint32 _eid, bytes32 _sender) external view returns (uint64); function lzReceive( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) external payable; }
// 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 _gracePeriod) 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 _expiry) 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 pragma solidity ^0.8.20; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { FeeConfig, IFee } from "./interfaces/IFee.sol"; /** * @title Fee * @notice Implements fee configuration and calculation. */ abstract contract Fee is IFee, Ownable { uint16 public constant BPS_DENOMINATOR = 10_000; /** * @dev Default fee basis points (BPS) for all destinations. */ uint16 public defaultFeeBps; /** * @dev Fee configuration for a specific destination LayerZero endpoint ID. */ mapping(uint32 dstEid => FeeConfig config) public feeBps; /** * @dev Sets the default fee basis points (BPS) for all destinations. */ function setDefaultFeeBps(uint16 _feeBps) external onlyOwner { if (_feeBps >= BPS_DENOMINATOR) revert IFee.InvalidBps(); defaultFeeBps = _feeBps; emit DefaultFeeBpsSet(_feeBps); } /** * @dev Sets the fee basis points (BPS) for a specific destination LayerZero EndpointV2 ID. */ function setFeeBps(uint32 _dstEid, uint16 _feeBps, bool _enabled) external onlyOwner { if (_feeBps >= BPS_DENOMINATOR) revert IFee.InvalidBps(); feeBps[_dstEid] = FeeConfig(_feeBps, _enabled); emit FeeBpsSet(_dstEid, _feeBps, _enabled); } /** * @dev Returns the fee for a specific destination LayerZero EndpointV2 ID. */ function getFee(uint32 _dstEid, uint256 _amount) public view virtual returns (uint256) { uint16 bps = _getFeeBps(_dstEid); return bps == 0 ? 0 : (_amount * bps) / BPS_DENOMINATOR; } function _getFeeBps(uint32 _dstEid) internal view returns (uint16) { FeeConfig memory config = feeBps[_dstEid]; if (config.enabled) { return config.feeBps; } else if (defaultFeeBps > 0) { return defaultFeeBps; } return 0; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { IERC20Metadata, IERC20 } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { IOFT, OFTCore } from "./OFTCore.sol"; /** * @title OFTAdapter Contract * @dev OFTAdapter is a contract that adapts an ERC-20 token to the OFT functionality. * * @dev For existing ERC20 tokens, this can be used to convert the token to crosschain compatibility. * @dev WARNING: ONLY 1 of these should exist for a given global mesh, * unless you make a NON-default implementation of OFT and needs to be done very carefully. * @dev WARNING: The default OFTAdapter implementation assumes LOSSLESS transfers, ie. 1 token in, 1 token out. * IF the 'innerToken' applies something like a transfer fee, the default will NOT work... * a pre/post balance check will need to be done to calculate the amountSentLD/amountReceivedLD. */ abstract contract OFTAdapter is OFTCore { using SafeERC20 for IERC20; IERC20 internal immutable innerToken; /** * @dev Constructor for the OFTAdapter contract. * @param _token The address of the ERC-20 token to be adapted. * @param _lzEndpoint The LayerZero endpoint address. * @param _delegate The delegate capable of making OApp configurations inside of the endpoint. */ constructor( address _token, address _lzEndpoint, address _delegate ) OFTCore(IERC20Metadata(_token).decimals(), _lzEndpoint, _delegate) { innerToken = IERC20(_token); } /** * @dev Retrieves the address of the underlying ERC20 implementation. * @return The address of the adapted ERC-20 token. * * @dev In the case of OFTAdapter, address(this) and erc20 are NOT the same contract. */ function token() public view returns (address) { return address(innerToken); } /** * @notice Indicates whether the OFT contract requires approval of the 'token()' to send. * @return requiresApproval Needs approval of the underlying token implementation. * * @dev In the case of default OFTAdapter, approval is required. * @dev In non-default OFTAdapter contracts with something like mint and burn privileges, it would NOT need approval. */ function approvalRequired() external pure virtual returns (bool) { return true; } /** * @dev Locks tokens from the sender's specified balance in this contract. * @param _from The address to debit from. * @param _amountLD The amount of tokens to send in local decimals. * @param _minAmountLD The minimum amount to send in local decimals. * @param _dstEid The destination chain ID. * @return amountSentLD The amount sent in local decimals. * @return amountReceivedLD The amount received in local decimals on the remote. * * @dev msg.sender will need to approve this _amountLD of tokens to be locked inside of the contract. * @dev WARNING: The default OFTAdapter implementation assumes LOSSLESS transfers, ie. 1 token in, 1 token out. * IF the 'innerToken' applies something like a transfer fee, the default will NOT work... * a pre/post balance check will need to be done to calculate the amountReceivedLD. */ function _debit( address _from, uint256 _amountLD, uint256 _minAmountLD, uint32 _dstEid ) internal virtual override returns (uint256 amountSentLD, uint256 amountReceivedLD) { (amountSentLD, amountReceivedLD) = _debitView(_amountLD, _minAmountLD, _dstEid); // @dev Lock tokens by moving them into this contract from the caller. innerToken.safeTransferFrom(_from, address(this), amountSentLD); } /** * @dev Credits tokens to the specified address. * @param _to The address to credit the tokens to. * @param _amountLD The amount of tokens to credit in local decimals. * @dev _srcEid The source chain ID. * @return amountReceivedLD The amount of tokens ACTUALLY received in local decimals. * * @dev WARNING: The default OFTAdapter implementation assumes LOSSLESS transfers, ie. 1 token in, 1 token out. * IF the 'innerToken' applies something like a transfer fee, the default will NOT work... * a pre/post balance check will need to be done to calculate the amountReceivedLD. */ function _credit( address _to, uint256 _amountLD, uint32 /*_srcEid*/ ) internal virtual override returns (uint256 amountReceivedLD) { // @dev Unlock the tokens and transfer to the recipient. innerToken.safeTransfer(_to, _amountLD); // @dev In the case of NON-default OFTAdapter, the amountLD MIGHT not be == amountReceivedLD. return _amountLD; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { OApp, Origin } from "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/OApp.sol"; import { OAppOptionsType3 } from "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/libs/OAppOptionsType3.sol"; import { IOAppMsgInspector } from "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/interfaces/IOAppMsgInspector.sol"; import { OAppPreCrimeSimulator } from "@layerzerolabs/lz-evm-oapp-v2/contracts/precrime/OAppPreCrimeSimulator.sol"; import { IOFT, SendParam, OFTLimit, OFTReceipt, OFTFeeDetail, MessagingReceipt, MessagingFee } from "./interfaces/IOFT.sol"; import { OFTMsgCodec } from "./libs/OFTMsgCodec.sol"; import { OFTComposeMsgCodec } from "./libs/OFTComposeMsgCodec.sol"; /** * @title OFTCore * @dev Abstract contract for the OftChain (OFT) token. */ abstract contract OFTCore is IOFT, OApp, OAppPreCrimeSimulator, OAppOptionsType3 { using OFTMsgCodec for bytes; using OFTMsgCodec for bytes32; // @notice Provides a conversion rate when swapping between denominations of SD and LD // - shareDecimals == SD == shared Decimals // - localDecimals == LD == local decimals // @dev Considers that tokens have different decimal amounts on various chains. // @dev eg. // For a token // - locally with 4 decimals --> 1.2345 => uint(12345) // - remotely with 2 decimals --> 1.23 => uint(123) // - The conversion rate would be 10 ** (4 - 2) = 100 // @dev If you want to send 1.2345 -> (uint 12345), you CANNOT represent that value on the remote, // you can only display 1.23 -> uint(123). // @dev To preserve the dust that would otherwise be lost on that conversion, // we need to unify a denomination that can be represented on ALL chains inside of the OFT mesh uint256 public immutable decimalConversionRate; // @notice Msg types that are used to identify the various OFT operations. // @dev This can be extended in child contracts for non-default oft operations // @dev These values are used in things like combineOptions() in OAppOptionsType3.sol. uint16 public constant SEND = 1; uint16 public constant SEND_AND_CALL = 2; // Address of an optional contract to inspect both 'message' and 'options' address public msgInspector; event MsgInspectorSet(address inspector); /** * @dev Constructor. * @param _localDecimals The decimals of the token on the local chain (this chain). * @param _endpoint The address of the LayerZero endpoint. * @param _delegate The delegate capable of making OApp configurations inside of the endpoint. */ constructor(uint8 _localDecimals, address _endpoint, address _delegate) OApp(_endpoint, _delegate) { if (_localDecimals < sharedDecimals()) revert InvalidLocalDecimals(); decimalConversionRate = 10 ** (_localDecimals - sharedDecimals()); } /** * @notice Retrieves interfaceID and the version of the OFT. * @return interfaceId The interface ID. * @return version The version. * * @dev interfaceId: This specific interface ID is '0x02e49c2c'. * @dev version: Indicates a cross-chain compatible msg encoding with other OFTs. * @dev If a new feature is added to the OFT cross-chain msg encoding, the version will be incremented. * ie. localOFT version(x,1) CAN send messages to remoteOFT version(x,1) */ function oftVersion() external pure virtual returns (bytes4 interfaceId, uint64 version) { return (type(IOFT).interfaceId, 1); } /** * @dev Retrieves the shared decimals of the OFT. * @return The shared decimals of the OFT. * * @dev Sets an implicit cap on the amount of tokens, over uint64.max() will need some sort of outbound cap / totalSupply cap * Lowest common decimal denominator between chains. * Defaults to 6 decimal places to provide up to 18,446,744,073,709.551615 units (max uint64). * For tokens exceeding this totalSupply(), they will need to override the sharedDecimals function with something smaller. * ie. 4 sharedDecimals would be 1,844,674,407,370,955.1615 */ function sharedDecimals() public view virtual returns (uint8) { return 6; } /** * @dev Sets the message inspector address for the OFT. * @param _msgInspector The address of the message inspector. * * @dev This is an optional contract that can be used to inspect both 'message' and 'options'. * @dev Set it to address(0) to disable it, or set it to a contract address to enable it. */ function setMsgInspector(address _msgInspector) public virtual onlyOwner { msgInspector = _msgInspector; emit MsgInspectorSet(_msgInspector); } /** * @notice Provides a quote for OFT-related operations. * @param _sendParam The parameters for the send operation. * @return oftLimit The OFT limit information. * @return oftFeeDetails The details of OFT fees. * @return oftReceipt The OFT receipt information. */ function quoteOFT( SendParam calldata _sendParam ) external view virtual returns (OFTLimit memory oftLimit, OFTFeeDetail[] memory oftFeeDetails, OFTReceipt memory oftReceipt) { uint256 minAmountLD = 0; // Unused in the default implementation. uint256 maxAmountLD = type(uint64).max; // Unused in the default implementation. oftLimit = OFTLimit(minAmountLD, maxAmountLD); // Unused in the default implementation; reserved for future complex fee details. oftFeeDetails = new OFTFeeDetail[](0); // @dev This is the same as the send() operation, but without the actual send. // - amountSentLD is the amount in local decimals that would be sent from the sender. // - amountReceivedLD is the amount in local decimals that will be credited to the recipient on the remote OFT instance. // @dev The amountSentLD MIGHT not equal the amount the user actually receives. HOWEVER, the default does. (uint256 amountSentLD, uint256 amountReceivedLD) = _debitView( _sendParam.amountLD, _sendParam.minAmountLD, _sendParam.dstEid ); oftReceipt = OFTReceipt(amountSentLD, amountReceivedLD); } /** * @notice Provides a quote for the send() operation. * @param _sendParam The parameters for the send() operation. * @param _payInLzToken Flag indicating whether the caller is paying in the LZ token. * @return msgFee The calculated LayerZero messaging fee from the send() operation. * * @dev MessagingFee: LayerZero msg fee * - nativeFee: The native fee. * - lzTokenFee: The lzToken fee. */ function quoteSend( SendParam calldata _sendParam, bool _payInLzToken ) external view virtual returns (MessagingFee memory msgFee) { // @dev mock the amount to receive, this is the same operation used in the send(). // The quote is as similar as possible to the actual send() operation. (, uint256 amountReceivedLD) = _debitView(_sendParam.amountLD, _sendParam.minAmountLD, _sendParam.dstEid); // @dev Builds the options and OFT message to quote in the endpoint. (bytes memory message, bytes memory options) = _buildMsgAndOptions(_sendParam, amountReceivedLD); // @dev Calculates the LayerZero fee for the send() operation. return _quote(_sendParam.dstEid, message, options, _payInLzToken); } /** * @dev Executes the send operation. * @param _sendParam The parameters for the send operation. * @param _fee The calculated fee for the send() operation. * - nativeFee: The native fee. * - lzTokenFee: The lzToken fee. * @param _refundAddress The address to receive any excess funds. * @return msgReceipt The receipt for the send operation. * @return oftReceipt The OFT receipt information. * * @dev MessagingReceipt: LayerZero msg receipt * - guid: The unique identifier for the sent message. * - nonce: The nonce of the sent message. * - fee: The LayerZero fee incurred for the message. */ function send( SendParam calldata _sendParam, MessagingFee calldata _fee, address _refundAddress ) external payable virtual returns (MessagingReceipt memory msgReceipt, OFTReceipt memory oftReceipt) { // @dev Applies the token transfers regarding this send() operation. // - amountSentLD is the amount in local decimals that was ACTUALLY sent/debited from the sender. // - amountReceivedLD is the amount in local decimals that will be received/credited to the recipient on the remote OFT instance. (uint256 amountSentLD, uint256 amountReceivedLD) = _debit( msg.sender, _sendParam.amountLD, _sendParam.minAmountLD, _sendParam.dstEid ); // @dev Builds the options and OFT message to quote in the endpoint. (bytes memory message, bytes memory options) = _buildMsgAndOptions(_sendParam, amountReceivedLD); // @dev Sends the message to the LayerZero endpoint and returns the LayerZero msg receipt. msgReceipt = _lzSend(_sendParam.dstEid, message, options, _fee, _refundAddress); // @dev Formulate the OFT receipt. oftReceipt = OFTReceipt(amountSentLD, amountReceivedLD); emit OFTSent(msgReceipt.guid, _sendParam.dstEid, msg.sender, amountSentLD, amountReceivedLD); } /** * @dev Internal function to build the message and options. * @param _sendParam The parameters for the send() operation. * @param _amountLD The amount in local decimals. * @return message The encoded message. * @return options The encoded options. */ function _buildMsgAndOptions( SendParam calldata _sendParam, uint256 _amountLD ) internal view virtual returns (bytes memory message, bytes memory options) { bool hasCompose; // @dev This generated message has the msg.sender encoded into the payload so the remote knows who the caller is. (message, hasCompose) = OFTMsgCodec.encode( _sendParam.to, _toSD(_amountLD), // @dev Must be include a non empty bytes if you want to compose, EVEN if you dont need it on the remote. // EVEN if you dont require an arbitrary payload to be sent... eg. '0x01' _sendParam.composeMsg ); // @dev Change the msg type depending if its composed or not. uint16 msgType = hasCompose ? SEND_AND_CALL : SEND; // @dev Combine the callers _extraOptions with the enforced options via the OAppOptionsType3. options = combineOptions(_sendParam.dstEid, msgType, _sendParam.extraOptions); // @dev Optionally inspect the message and options depending if the OApp owner has set a msg inspector. // @dev If it fails inspection, needs to revert in the implementation. ie. does not rely on return boolean if (msgInspector != address(0)) IOAppMsgInspector(msgInspector).inspect(message, options); } /** * @dev Internal function to handle the receive on the LayerZero endpoint. * @param _origin The origin information. * - srcEid: The source chain endpoint ID. * - sender: The sender address from the src chain. * - nonce: The nonce of the LayerZero message. * @param _guid The unique identifier for the received LayerZero message. * @param _message The encoded message. * @dev _executor The address of the executor. * @dev _extraData Additional data. */ function _lzReceive( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address /*_executor*/, // @dev unused in the default implementation. bytes calldata /*_extraData*/ // @dev unused in the default implementation. ) internal virtual override { // @dev The src sending chain doesnt know the address length on this chain (potentially non-evm) // Thus everything is bytes32() encoded in flight. address toAddress = _message.sendTo().bytes32ToAddress(); // @dev Credit the amountLD to the recipient and return the ACTUAL amount the recipient received in local decimals uint256 amountReceivedLD = _credit(toAddress, _toLD(_message.amountSD()), _origin.srcEid); if (_message.isComposed()) { // @dev Proprietary composeMsg format for the OFT. bytes memory composeMsg = OFTComposeMsgCodec.encode( _origin.nonce, _origin.srcEid, amountReceivedLD, _message.composeMsg() ); // @dev Stores the lzCompose payload that will be executed in a separate tx. // Standardizes functionality for executing arbitrary contract invocation on some non-evm chains. // @dev The off-chain executor will listen and process the msg based on the src-chain-callers compose options passed. // @dev The index is used when a OApp needs to compose multiple msgs on lzReceive. // For default OFT implementation there is only 1 compose msg per lzReceive, thus its always 0. endpoint.sendCompose(toAddress, _guid, 0 /* the index of the composed message*/, composeMsg); } emit OFTReceived(_guid, _origin.srcEid, toAddress, amountReceivedLD); } /** * @dev Internal function to handle the OAppPreCrimeSimulator simulated receive. * @param _origin The origin information. * - srcEid: The source chain endpoint ID. * - sender: The sender address from the src chain. * - nonce: The nonce of the LayerZero message. * @param _guid The unique identifier for the received LayerZero message. * @param _message The LayerZero message. * @param _executor The address of the off-chain executor. * @param _extraData Arbitrary data passed by the msg executor. * * @dev Enables the preCrime simulator to mock sending lzReceive() messages, * routes the msg down from the OAppPreCrimeSimulator, and back up to the OAppReceiver. */ function _lzReceiveSimulate( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) internal virtual override { _lzReceive(_origin, _guid, _message, _executor, _extraData); } /** * @dev Check if the peer is considered 'trusted' by the OApp. * @param _eid The endpoint ID to check. * @param _peer The peer to check. * @return Whether the peer passed is considered 'trusted' by the OApp. * * @dev Enables OAppPreCrimeSimulator to check whether a potential Inbound Packet is from a trusted source. */ function isPeer(uint32 _eid, bytes32 _peer) public view virtual override returns (bool) { return peers[_eid] == _peer; } /** * @dev Internal function to remove dust from the given local decimal amount. * @param _amountLD The amount in local decimals. * @return amountLD The amount after removing dust. * * @dev Prevents the loss of dust when moving amounts between chains with different decimals. * @dev eg. uint(123) with a conversion rate of 100 becomes uint(100). */ function _removeDust(uint256 _amountLD) internal view virtual returns (uint256 amountLD) { return (_amountLD / decimalConversionRate) * decimalConversionRate; } /** * @dev Internal function to convert an amount from shared decimals into local decimals. * @param _amountSD The amount in shared decimals. * @return amountLD The amount in local decimals. */ function _toLD(uint64 _amountSD) internal view virtual returns (uint256 amountLD) { return _amountSD * decimalConversionRate; } /** * @dev Internal function to convert an amount from local decimals into shared decimals. * @param _amountLD The amount in local decimals. * @return amountSD The amount in shared decimals. */ function _toSD(uint256 _amountLD) internal view virtual returns (uint64 amountSD) { return uint64(_amountLD / decimalConversionRate); } /** * @dev Internal function to mock the amount mutation from a OFT debit() operation. * @param _amountLD The amount to send in local decimals. * @param _minAmountLD The minimum amount to send in local decimals. * @dev _dstEid The destination endpoint ID. * @return amountSentLD The amount sent, in local decimals. * @return amountReceivedLD The amount to be received on the remote chain, in local decimals. * * @dev This is where things like fees would be calculated and deducted from the amount to be received on the remote. */ function _debitView( uint256 _amountLD, uint256 _minAmountLD, uint32 /*_dstEid*/ ) internal view virtual returns (uint256 amountSentLD, uint256 amountReceivedLD) { // @dev Remove the dust so nothing is lost on the conversion between chains with different decimals for the token. amountSentLD = _removeDust(_amountLD); // @dev The amount to send is the same as amount received in the default implementation. amountReceivedLD = amountSentLD; // @dev Check for slippage. if (amountReceivedLD < _minAmountLD) { revert SlippageExceeded(amountReceivedLD, _minAmountLD); } } /** * @dev Internal function to perform a debit operation. * @param _from The address to debit. * @param _amountLD The amount to send in local decimals. * @param _minAmountLD The minimum amount to send in local decimals. * @param _dstEid The destination endpoint ID. * @return amountSentLD The amount sent in local decimals. * @return amountReceivedLD The amount received in local decimals on the remote. * * @dev Defined here but are intended to be overriden depending on the OFT implementation. * @dev Depending on OFT implementation the _amountLD could differ from the amountReceivedLD. */ function _debit( address _from, uint256 _amountLD, uint256 _minAmountLD, uint32 _dstEid ) internal virtual returns (uint256 amountSentLD, uint256 amountReceivedLD); /** * @dev Internal function to perform a credit operation. * @param _to The address to credit. * @param _amountLD The amount to credit in local decimals. * @param _srcEid The source endpoint ID. * @return amountReceivedLD The amount ACTUALLY received in local decimals. * * @dev Defined here but are intended to be overriden depending on the OFT implementation. * @dev Depending on OFT implementation the _amountLD could differ from the amountReceivedLD. */ function _credit( address _to, uint256 _amountLD, uint32 _srcEid ) internal virtual returns (uint256 amountReceivedLD); }
// SPDX-LICENSE-IDENTIFIER: MIT pragma solidity ^0.8.0; struct FeeConfig { uint16 feeBps; bool enabled; } /** * @title Fee interface. * @notice A generic interface for collecting fees. */ interface IFee { // errors error InvalidBps(); error InvalidFeeOwner(); // events event FeeBpsSet(uint32 dstEid, uint16 feeBps, bool enabled); event DefaultFeeBpsSet(uint16 feeBps); // setters /** * @dev Sets the default fee basis points (BPS) for all destinations. */ function setDefaultFeeBps(uint16 _feeBps) external; /** * @dev Sets the fee basis points (BPS) for a specific destination LayerZero EndpointV2 ID. */ function setFeeBps(uint32 _dstEid, uint16 _feeBps, bool _enabled) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { MessagingReceipt, MessagingFee } from "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/OAppSender.sol"; /** * @dev Struct representing token parameters for the OFT send() operation. */ struct SendParam { uint32 dstEid; // Destination endpoint ID. bytes32 to; // Recipient address. uint256 amountLD; // Amount to send in local decimals. uint256 minAmountLD; // Minimum amount to send in local decimals. bytes extraOptions; // Additional options supplied by the caller to be used in the LayerZero message. bytes composeMsg; // The composed message for the send() operation. bytes oftCmd; // The OFT command to be executed, unused in default OFT implementations. } /** * @dev Struct representing OFT limit information. * @dev These amounts can change dynamically and are up the the specific oft implementation. */ struct OFTLimit { uint256 minAmountLD; // Minimum amount in local decimals that can be sent to the recipient. uint256 maxAmountLD; // Maximum amount in local decimals that can be sent to the recipient. } /** * @dev Struct representing OFT receipt information. */ struct OFTReceipt { uint256 amountSentLD; // Amount of tokens ACTUALLY debited from the sender in local decimals. // @dev In non-default implementations, the amountReceivedLD COULD differ from this value. uint256 amountReceivedLD; // Amount of tokens to be received on the remote side. } /** * @dev Struct representing OFT fee details. * @dev Future proof mechanism to provide a standardized way to communicate fees to things like a UI. */ struct OFTFeeDetail { int256 feeAmountLD; // Amount of the fee in local decimals. string description; // Description of the fee. } /** * @title IOFT * @dev Interface for the OftChain (OFT) token. * @dev Does not inherit ERC20 to accommodate usage by OFTAdapter as well. * @dev This specific interface ID is '0x02e49c2c'. */ interface IOFT { // Custom error messages error InvalidLocalDecimals(); error SlippageExceeded(uint256 amountLD, uint256 minAmountLD); // Events event OFTSent( bytes32 indexed guid, // GUID of the OFT message. uint32 dstEid, // Destination Endpoint ID. address indexed fromAddress, // Address of the sender on the src chain. uint256 amountSentLD, // Amount of tokens sent in local decimals. uint256 amountReceivedLD // Amount of tokens received in local decimals. ); event OFTReceived( bytes32 indexed guid, // GUID of the OFT message. uint32 srcEid, // Source Endpoint ID. address indexed toAddress, // Address of the recipient on the dst chain. uint256 amountReceivedLD // Amount of tokens received in local decimals. ); /** * @notice Retrieves interfaceID and the version of the OFT. * @return interfaceId The interface ID. * @return version The version. * * @dev interfaceId: This specific interface ID is '0x02e49c2c'. * @dev version: Indicates a cross-chain compatible msg encoding with other OFTs. * @dev If a new feature is added to the OFT cross-chain msg encoding, the version will be incremented. * ie. localOFT version(x,1) CAN send messages to remoteOFT version(x,1) */ function oftVersion() external view returns (bytes4 interfaceId, uint64 version); /** * @notice Retrieves the address of the token associated with the OFT. * @return token The address of the ERC20 token implementation. */ function token() external view returns (address); /** * @notice Indicates whether the OFT contract requires approval of the 'token()' to send. * @return requiresApproval Needs approval of the underlying token implementation. * * @dev Allows things like wallet implementers to determine integration requirements, * without understanding the underlying token implementation. */ function approvalRequired() external view returns (bool); /** * @notice Retrieves the shared decimals of the OFT. * @return sharedDecimals The shared decimals of the OFT. */ function sharedDecimals() external view returns (uint8); /** * @notice Provides a quote for OFT-related operations. * @param _sendParam The parameters for the send operation. * @return limit The OFT limit information. * @return oftFeeDetails The details of OFT fees. * @return receipt The OFT receipt information. */ function quoteOFT( SendParam calldata _sendParam ) external view returns (OFTLimit memory, OFTFeeDetail[] memory oftFeeDetails, OFTReceipt memory); /** * @notice Provides a quote for the send() operation. * @param _sendParam The parameters for the send() operation. * @param _payInLzToken Flag indicating whether the caller is paying in the LZ token. * @return fee The calculated LayerZero messaging fee from the send() operation. * * @dev MessagingFee: LayerZero msg fee * - nativeFee: The native fee. * - lzTokenFee: The lzToken fee. */ function quoteSend(SendParam calldata _sendParam, bool _payInLzToken) external view returns (MessagingFee memory); /** * @notice Executes the send() operation. * @param _sendParam The parameters for the send operation. * @param _fee The fee information supplied by the caller. * - nativeFee: The native fee. * - lzTokenFee: The lzToken fee. * @param _refundAddress The address to receive any excess funds from fees etc. on the src. * @return receipt The LayerZero messaging receipt from the send() operation. * @return oftReceipt The OFT receipt information. * * @dev MessagingReceipt: LayerZero msg receipt * - guid: The unique identifier for the sent message. * - nonce: The nonce of the sent message. * - fee: The LayerZero fee incurred for the message. */ function send( SendParam calldata _sendParam, MessagingFee calldata _fee, address _refundAddress ) external payable returns (MessagingReceipt memory, OFTReceipt memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; library OFTComposeMsgCodec { // Offset constants for decoding composed messages uint8 private constant NONCE_OFFSET = 8; uint8 private constant SRC_EID_OFFSET = 12; uint8 private constant AMOUNT_LD_OFFSET = 44; uint8 private constant COMPOSE_FROM_OFFSET = 76; /** * @dev Encodes a OFT composed message. * @param _nonce The nonce value. * @param _srcEid The source endpoint ID. * @param _amountLD The amount in local decimals. * @param _composeMsg The composed message. * @return _msg The encoded Composed message. */ function encode( uint64 _nonce, uint32 _srcEid, uint256 _amountLD, bytes memory _composeMsg // 0x[composeFrom][composeMsg] ) internal pure returns (bytes memory _msg) { _msg = abi.encodePacked(_nonce, _srcEid, _amountLD, _composeMsg); } /** * @dev Retrieves the nonce from the composed message. * @param _msg The message. * @return The nonce value. */ function nonce(bytes calldata _msg) internal pure returns (uint64) { return uint64(bytes8(_msg[:NONCE_OFFSET])); } /** * @dev Retrieves the source endpoint ID from the composed message. * @param _msg The message. * @return The source endpoint ID. */ function srcEid(bytes calldata _msg) internal pure returns (uint32) { return uint32(bytes4(_msg[NONCE_OFFSET:SRC_EID_OFFSET])); } /** * @dev Retrieves the amount in local decimals from the composed message. * @param _msg The message. * @return The amount in local decimals. */ function amountLD(bytes calldata _msg) internal pure returns (uint256) { return uint256(bytes32(_msg[SRC_EID_OFFSET:AMOUNT_LD_OFFSET])); } /** * @dev Retrieves the composeFrom value from the composed message. * @param _msg The message. * @return The composeFrom value. */ function composeFrom(bytes calldata _msg) internal pure returns (bytes32) { return bytes32(_msg[AMOUNT_LD_OFFSET:COMPOSE_FROM_OFFSET]); } /** * @dev Retrieves the composed message. * @param _msg The message. * @return The composed message. */ function composeMsg(bytes calldata _msg) internal pure returns (bytes memory) { return _msg[COMPOSE_FROM_OFFSET:]; } /** * @dev Converts an address to bytes32. * @param _addr The address to convert. * @return The bytes32 representation of the address. */ function addressToBytes32(address _addr) internal pure returns (bytes32) { return bytes32(uint256(uint160(_addr))); } /** * @dev Converts bytes32 to an address. * @param _b The bytes32 value to convert. * @return The address representation of bytes32. */ function bytes32ToAddress(bytes32 _b) internal pure returns (address) { return address(uint160(uint256(_b))); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; library OFTMsgCodec { // Offset constants for encoding and decoding OFT messages uint8 private constant SEND_TO_OFFSET = 32; uint8 private constant SEND_AMOUNT_SD_OFFSET = 40; /** * @dev Encodes an OFT LayerZero message. * @param _sendTo The recipient address. * @param _amountShared The amount in shared decimals. * @param _composeMsg The composed message. * @return _msg The encoded message. * @return hasCompose A boolean indicating whether the message has a composed payload. */ function encode( bytes32 _sendTo, uint64 _amountShared, bytes memory _composeMsg ) internal view returns (bytes memory _msg, bool hasCompose) { hasCompose = _composeMsg.length > 0; // @dev Remote chains will want to know the composed function caller ie. msg.sender on the src. _msg = hasCompose ? abi.encodePacked(_sendTo, _amountShared, addressToBytes32(msg.sender), _composeMsg) : abi.encodePacked(_sendTo, _amountShared); } /** * @dev Checks if the OFT message is composed. * @param _msg The OFT message. * @return A boolean indicating whether the message is composed. */ function isComposed(bytes calldata _msg) internal pure returns (bool) { return _msg.length > SEND_AMOUNT_SD_OFFSET; } /** * @dev Retrieves the recipient address from the OFT message. * @param _msg The OFT message. * @return The recipient address. */ function sendTo(bytes calldata _msg) internal pure returns (bytes32) { return bytes32(_msg[:SEND_TO_OFFSET]); } /** * @dev Retrieves the amount in shared decimals from the OFT message. * @param _msg The OFT message. * @return The amount in shared decimals. */ function amountSD(bytes calldata _msg) internal pure returns (uint64) { return uint64(bytes8(_msg[SEND_TO_OFFSET:SEND_AMOUNT_SD_OFFSET])); } /** * @dev Retrieves the composed message from the OFT message. * @param _msg The OFT message. * @return The composed message. */ function composeMsg(bytes calldata _msg) internal pure returns (bytes memory) { return _msg[SEND_AMOUNT_SD_OFFSET:]; } /** * @dev Converts an address to bytes32. * @param _addr The address to convert. * @return The bytes32 representation of the address. */ function addressToBytes32(address _addr) internal pure returns (bytes32) { return bytes32(uint256(uint160(_addr))); } /** * @dev Converts bytes32 to an address. * @param _b The bytes32 value to convert. * @return The address representation of bytes32. */ function bytes32ToAddress(bytes32 _b) internal pure returns (address) { return address(uint160(uint256(_b))); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {Context} from "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is set to the address provided by the deployer. This can * later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 value) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets a `value` amount of tokens as the allowance of `spender` over the * caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. * * CAUTION: See Security Considerations above. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC20Permit} from "../extensions/IERC20Permit.sol"; import {Address} from "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev An operation with an ERC20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value))); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value))); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert FailedInnerCall(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol) pragma solidity ^0.8.20; /** * @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: MIT pragma solidity ^0.8.20; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { OFTAdapter } from "@layerzerolabs/oft-evm/contracts/OFTAdapter.sol"; import { Fee } from "@layerzerolabs/oft-evm/contracts/Fee.sol"; /** * @title OFTFeeAdapter * @notice OFTAdepter with fees. */ abstract contract OFTFeeAdapter is OFTAdapter, Fee { using SafeERC20 for IERC20; uint256 public feeBalance; error NoFeesToWithdraw(); event FeeWithdrawn(address indexed to, uint256 amountLD); constructor( address _token, address _lzEndpoint, address _owner ) OFTAdapter(_token, _lzEndpoint, _owner) Ownable(_owner) {} // @dev Fees accumulate inside of the contract to save gas, and then can be withdrawn by the owner. function withdrawFees(address _to) external onlyOwner { // @dev doesn't allow owner to pull from the locked assets of the contract, // only from accumulated fees uint256 balance = feeBalance; if (balance == 0) revert NoFeesToWithdraw(); feeBalance = 0; innerToken.safeTransfer(_to, balance); emit FeeWithdrawn(_to, balance); } function _debitView( uint256 _amountLD, uint256 _minAmountLD, uint32 _dstEid ) internal view virtual override returns (uint256 amountSentLD, uint256 amountReceivedLD) { amountSentLD = _amountLD; // @dev Apply the fee, then de-dust the amount afterwards. // This means the fee is taken from the amount before the dust is removed. uint256 fee = getFee(_dstEid, _amountLD); amountReceivedLD = _removeDust(_amountLD - fee); // @dev Check for slippage. if (amountReceivedLD < _minAmountLD) { revert SlippageExceeded(amountReceivedLD, _minAmountLD); } } function _debit( address _from, uint256 _amountLD, uint256 _minAmountLD, uint32 _dstEid ) internal virtual override returns (uint256 amountSentLD, uint256 amountReceivedLD) { (amountSentLD, amountReceivedLD) = _debitView(_amountLD, _minAmountLD, _dstEid); innerToken.safeTransferFrom(_from, address(this), amountSentLD); if (amountSentLD > amountReceivedLD) { // @dev increment the total fees that can be withdrawn feeBalance += (amountSentLD - amountReceivedLD); } } }
{ "evmVersion": "paris", "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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EnforcedOptionParam[]","name":"_enforcedOptions","type":"tuple[]"}],"name":"setEnforcedOptions","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_dstEid","type":"uint32"},{"internalType":"uint16","name":"_feeBps","type":"uint16"},{"internalType":"bool","name":"_enabled","type":"bool"}],"name":"setFeeBps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_msgInspector","type":"address"}],"name":"setMsgInspector","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_eid","type":"uint32"},{"internalType":"bytes32","name":"_peer","type":"bytes32"}],"name":"setPeer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_preCrime","type":"address"}],"name":"setPreCrime","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sharedDecimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"}],"name":"withdrawFees","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000002260fac5e5542a773aa44fbcfedf7c193bc2c5990000000000000000000000001a44076050125825900e736c501f859c50fe728c0000000000000000000000009e175ace5148c5430aa4ce1c0e56856d8df24a89
-----Decoded View---------------
Arg [0] : _token (address): 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599
Arg [1] : _lzEndpoint (address): 0x1a44076050125825900e736c501f859c50fE728c
Arg [2] : _owner (address): 0x9E175acE5148c5430aA4ce1C0E56856d8df24A89
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000002260fac5e5542a773aa44fbcfedf7c193bc2c599
Arg [1] : 0000000000000000000000001a44076050125825900e736c501f859c50fe728c
Arg [2] : 0000000000000000000000009e175ace5148c5430aa4ce1c0e56856d8df24a89
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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.