ERC-20
Artificial Intelligence
Overview
Max Total Supply
1,547,105,072.629519 MASA
Holders
2,809 ( 0.036%)
Market
Price
$0.04 @ 0.000015 ETH (-0.92%)
Onchain Market Cap
$61,594,089.76
Circulating Supply Market Cap
$0.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
10,331.812393648469854967 MASAValue
$411.34 ( ~0.157242274660253 Eth) [0.0007%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
MasaToken
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 1 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.20; import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import {ERC20Pausable} from "@openzeppelin/contracts/token/ERC20/extensions/ERC20Pausable.sol"; import {ERC20Burnable} from "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol"; import {AccessControlEnumerable} from "@openzeppelin/contracts/access/AccessControlEnumerable.sol"; import {OFT} from "@layerzerolabs/lz-evm-oapp-v2/contracts/oft/OFT.sol"; /** * @title MasaToken * @dev MasaToken is a LayerZero OFT contract for Masa Token on Ethereum chain */ contract MasaToken is AccessControlEnumerable, ERC20Pausable, ERC20Burnable, OFT { bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE"); /** * @dev Constructor that gives _delegate all of the existing roles. * @param _lzEndpoint LayerZero endpoint address * @param _delegate address to be given all roles, and capable of making OApp configurations inside of the endpoint */ constructor( address _lzEndpoint, address _delegate ) OFT("Masa Token", "MASA", _lzEndpoint, _delegate) { // give up roles from sender renounceRole(DEFAULT_ADMIN_ROLE, _msgSender()); renounceRole(MINTER_ROLE, _msgSender()); renounceRole(PAUSER_ROLE, _msgSender()); // assign roles to admin _setupRole(DEFAULT_ADMIN_ROLE, _delegate); _setupRole(MINTER_ROLE, _delegate); _setupRole(PAUSER_ROLE, _delegate); transferOwnership(_delegate); } /** * @dev Creates `amount` new tokens for `to`. * * See {ERC20-_mint}. * * Requirements: * * - the caller must have the `MINTER_ROLE`. */ function mint(address to, uint256 amount) public virtual { require( hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint" ); require(!paused(), "ERC20Pausable: token transfer while paused"); _mint(to, amount); } /** * @dev Pauses all token transfers. * * See {ERC20Pausable} and {Pausable-_pause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function pause() public virtual { require( hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to pause" ); _pause(); } /** * @dev Unpauses all token transfers. * * See {ERC20Pausable} and {Pausable-_unpause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function unpause() public virtual { require( hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to unpause" ); _unpause(); } /** * @dev See {ERC20-_beforeTokenTransfer}. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual override(ERC20, ERC20Pausable) { super._beforeTokenTransfer(from, to, amount); } }
// 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 Retrieves the address responsible for 'sending' composeMsg's to the Endpoint. * @return sender The address responsible for 'sending' composeMsg's to the Endpoint. * * @dev Applications can optionally choose to implement a separate composeMsg sender that is NOT the bridging layer. * @dev The default sender IS the OApp implementer. */ function composeMsgSender() external view returns (address sender); }
// 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 { 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 calldata _options) internal pure virtual { uint16 optionsType = uint16(bytes2(_options[0:2])); if (optionsType != OPTION_TYPE_3) revert InvalidOptions(_options); } }
// 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 { 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 = 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 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 Retrieves the address responsible for 'sending' composeMsg's to the Endpoint. * @return sender The address responsible for 'sending' composeMsg's to the Endpoint. * * @dev Applications can optionally choose to implement a separate composeMsg sender that is NOT the bridging layer. * @dev The default sender IS the OApp implementer. */ function composeMsgSender() public view virtual returns (address sender) { return 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 { MessagingReceipt, MessagingFee } from "../../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 amountLD // Amount of tokens sent 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 amountLD // 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 pragma solidity ^0.8.20; import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import { IOFT, OFTCore } from "./OFTCore.sol"; /** * @title OFT Contract * @dev OFT is an ERC-20 token that extends the functionality of the OFTCore contract. */ abstract contract OFT is OFTCore, ERC20 { /** * @dev Constructor for the OFT contract. * @param _name The name of the OFT. * @param _symbol The symbol of the OFT. * @param _lzEndpoint The LayerZero endpoint address. * @param _delegate The delegate capable of making OApp configurations inside of the endpoint. */ constructor( string memory _name, string memory _symbol, address _lzEndpoint, address _delegate ) ERC20(_name, _symbol) OFTCore(decimals(), _lzEndpoint, _delegate) {} /** * @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 address of the underlying ERC20 implementation. * @return The address of the OFT token. * * @dev In the case of OFT, address(this) and erc20 are the same contract. */ function token() external view returns (address) { return address(this); } /** * @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 OFT where the contract IS the token, approval is NOT required. */ function approvalRequired() external pure virtual returns (bool) { return false; } /** * @dev Burns tokens from the sender's specified balance. * @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. */ function _debit( uint256 _amountLD, uint256 _minAmountLD, uint32 _dstEid ) internal virtual override returns (uint256 amountSentLD, uint256 amountReceivedLD) { (amountSentLD, amountReceivedLD) = _debitView(_amountLD, _minAmountLD, _dstEid); // @dev In NON-default OFT, amountSentLD could be 100, with a 10% fee, the amountReceivedLD amount is 90, // therefore amountSentLD CAN differ from amountReceivedLD. // @dev Default OFT burns on src. _burn(msg.sender, 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. */ function _credit( address _to, uint256 _amountLD, uint32 /*_srcEid*/ ) internal virtual override returns (uint256 amountReceivedLD) { // @dev Default OFT mints on dst. _mint(_to, _amountLD); // @dev In the case of NON-default OFT, the _amountLD MIGHT not be == amountReceivedLD. return _amountLD; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { OApp, Origin } from "../oapp/OApp.sol"; import { OAppOptionsType3 } from "../oapp/libs/OAppOptionsType3.sol"; import { IOAppMsgInspector } from "../oapp/interfaces/IOAppMsgInspector.sol"; import { OAppPreCrimeSimulator } from "../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()); } /** * @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 pure 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 from the sender. // - amountReceivedLD is the amount in local decimals that will be credited to the recipient on the remote OFT instance. (uint256 amountSentLD, uint256 amountReceivedLD) = _debit( _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); } /** * @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 _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( 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 ^0.8.20; // @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 ^0.8.20; 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 >=0.8.0; 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 _timeout) external; function defaultReceiveLibrary(uint32 _eid) external view returns (address); function setDefaultReceiveLibraryTimeout(uint32 _eid, address _lib, uint256 _expiry) external; function defaultReceiveLibraryTimeout(uint32 _eid) external view returns (address lib, uint256 expiry); function isSupportedEid(uint32 _eid) external view returns (bool); function isValidReceiveLibrary(address _receiver, uint32 _eid, address _lib) external view returns (bool); /// ------------------- OApp interfaces ------------------- function setSendLibrary(address _oapp, uint32 _eid, address _newLib) external; function getSendLibrary(address _sender, uint32 _eid) external view returns (address lib); function isDefaultSendLibrary(address _sender, uint32 _eid) external view returns (bool); function setReceiveLibrary(address _oapp, uint32 _eid, address _newLib, uint256 _gracePeriod) external; function getReceiveLibrary(address _receiver, uint32 _eid) external view returns (address lib, bool isDefault); function setReceiveLibraryTimeout(address _oapp, uint32 _eid, address _lib, uint256 _gracePeriod) external; function receiveLibraryTimeout(address _receiver, uint32 _eid) external view returns (address lib, uint256 expiry); function setConfig(address _oapp, address _lib, SetConfigParam[] calldata _params) external; function getConfig( address _oapp, address _lib, uint32 _eid, uint32 _configType ) external view returns (bytes memory config); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingChannel { event InboundNonceSkipped(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce); event PacketNilified(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); event PacketBurnt(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); function eid() external view returns (uint32); // this is an emergency function if a message cannot be verified for some reasons // required to provide _nextNonce to avoid race condition function skip(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce) external; function nilify(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function burn(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function nextGuid(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (bytes32); function inboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); function outboundNonce(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (uint64); function inboundPayloadHash( address _receiver, uint32 _srcEid, bytes32 _sender, uint64 _nonce ) external view returns (bytes32); function lazyInboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingComposer { event ComposeSent(address from, address to, bytes32 guid, uint16 index, bytes message); event ComposeDelivered(address from, address to, bytes32 guid, uint16 index); event LzComposeAlert( address indexed from, address indexed to, address indexed executor, bytes32 guid, uint16 index, uint256 gas, uint256 value, bytes message, bytes extraData, bytes reason ); function composeQueue( address _from, address _to, bytes32 _guid, uint16 _index ) external view returns (bytes32 messageHash); function sendCompose(address _to, bytes32 _guid, uint16 _index, bytes calldata _message) external; function lzCompose( address _from, address _to, bytes32 _guid, uint16 _index, bytes calldata _message, bytes calldata _extraData ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingContext { function isSendingMessage() external view returns (bool); function getSendContext() external view returns (uint32 dstEid, address sender); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { MessagingFee } from "./ILayerZeroEndpointV2.sol"; import { IMessageLib } from "./IMessageLib.sol"; struct Packet { uint64 nonce; uint32 srcEid; address sender; uint32 dstEid; bytes32 receiver; bytes32 guid; bytes message; } interface ISendLib is IMessageLib { function send( Packet calldata _packet, bytes calldata _options, bool _payInLzToken ) external returns (MessagingFee memory, bytes memory encodedPacket); function quote( Packet calldata _packet, bytes calldata _options, bool _payInLzToken ) external view returns (MessagingFee memory); function setTreasury(address _treasury) external; function withdrawFee(address _to, uint256 _amount) external; function withdrawLzTokenFee(address _lzToken, address _to, uint256 _amount) external; }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; library AddressCast { error AddressCast_InvalidSizeForAddress(); error AddressCast_InvalidAddress(); function toBytes32(bytes calldata _addressBytes) internal pure returns (bytes32 result) { if (_addressBytes.length > 32) revert AddressCast_InvalidAddress(); result = bytes32(_addressBytes); unchecked { uint256 offset = 32 - _addressBytes.length; result = result >> (offset * 8); } } function toBytes32(address _address) internal pure returns (bytes32 result) { result = bytes32(uint256(uint160(_address))); } function toBytes(bytes32 _addressBytes32, uint256 _size) internal pure returns (bytes memory result) { if (_size == 0 || _size > 32) revert AddressCast_InvalidSizeForAddress(); result = new bytes(_size); unchecked { uint256 offset = 256 - _size * 8; assembly { mstore(add(result, 32), shl(offset, _addressBytes32)) } } } function toAddress(bytes32 _addressBytes32) internal pure returns (address result) { result = address(uint160(uint256(_addressBytes32))); } function toAddress(bytes calldata _addressBytes) internal pure returns (address result) { if (_addressBytes.length != 20) revert AddressCast_InvalidAddress(); result = address(bytes20(_addressBytes)); } }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { Packet } from "../../interfaces/ISendLib.sol"; import { AddressCast } from "../../libs/AddressCast.sol"; library PacketV1Codec { using AddressCast for address; using AddressCast for bytes32; uint8 internal constant PACKET_VERSION = 1; // header (version + nonce + path) // version uint256 private constant PACKET_VERSION_OFFSET = 0; // nonce uint256 private constant NONCE_OFFSET = 1; // path uint256 private constant SRC_EID_OFFSET = 9; uint256 private constant SENDER_OFFSET = 13; uint256 private constant DST_EID_OFFSET = 45; uint256 private constant RECEIVER_OFFSET = 49; // payload (guid + message) uint256 private constant GUID_OFFSET = 81; // keccak256(nonce + path) uint256 private constant MESSAGE_OFFSET = 113; function encode(Packet memory _packet) internal pure returns (bytes memory encodedPacket) { encodedPacket = abi.encodePacked( PACKET_VERSION, _packet.nonce, _packet.srcEid, _packet.sender.toBytes32(), _packet.dstEid, _packet.receiver, _packet.guid, _packet.message ); } function encodePacketHeader(Packet memory _packet) internal pure returns (bytes memory) { return abi.encodePacked( PACKET_VERSION, _packet.nonce, _packet.srcEid, _packet.sender.toBytes32(), _packet.dstEid, _packet.receiver ); } function encodePayload(Packet memory _packet) internal pure returns (bytes memory) { return abi.encodePacked(_packet.guid, _packet.message); } function header(bytes calldata _packet) internal pure returns (bytes calldata) { return _packet[0:GUID_OFFSET]; } function version(bytes calldata _packet) internal pure returns (uint8) { return uint8(bytes1(_packet[PACKET_VERSION_OFFSET:NONCE_OFFSET])); } function nonce(bytes calldata _packet) internal pure returns (uint64) { return uint64(bytes8(_packet[NONCE_OFFSET:SRC_EID_OFFSET])); } function srcEid(bytes calldata _packet) internal pure returns (uint32) { return uint32(bytes4(_packet[SRC_EID_OFFSET:SENDER_OFFSET])); } function sender(bytes calldata _packet) internal pure returns (bytes32) { return bytes32(_packet[SENDER_OFFSET:DST_EID_OFFSET]); } function senderAddressB20(bytes calldata _packet) internal pure returns (address) { return sender(_packet).toAddress(); } function dstEid(bytes calldata _packet) internal pure returns (uint32) { return uint32(bytes4(_packet[DST_EID_OFFSET:RECEIVER_OFFSET])); } function receiver(bytes calldata _packet) internal pure returns (bytes32) { return bytes32(_packet[RECEIVER_OFFSET:GUID_OFFSET]); } function receiverB20(bytes calldata _packet) internal pure returns (address) { return receiver(_packet).toAddress(); } function guid(bytes calldata _packet) internal pure returns (bytes32) { return bytes32(_packet[GUID_OFFSET:MESSAGE_OFFSET]); } function message(bytes calldata _packet) internal pure returns (bytes calldata) { return bytes(_packet[MESSAGE_OFFSET:]); } function payload(bytes calldata _packet) internal pure returns (bytes calldata) { return bytes(_packet[GUID_OFFSET:]); } function payloadHash(bytes calldata _packet) internal pure returns (bytes32) { return keccak256(payload(_packet)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ```solidity * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ```solidity * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules} * to enforce additional security measures for this role. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(account), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * May emit a {RoleGranted} event. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControlEnumerable.sol"; import "./AccessControl.sol"; import "../utils/structs/EnumerableSet.sol"; /** * @dev Extension of {AccessControl} that allows enumerating the members of each role. */ abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl { using EnumerableSet for EnumerableSet.AddressSet; mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) { return _roleMembers[role].at(index); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) { return _roleMembers[role].length(); } /** * @dev Overload {_grantRole} to track enumerable memberships */ function _grantRole(bytes32 role, address account) internal virtual override { super._grantRole(role, account); _roleMembers[role].add(account); } /** * @dev Overload {_revokeRole} to track enumerable memberships */ function _revokeRole(bytes32 role, address account) internal virtual override { super._revokeRole(role, account); _roleMembers[role].remove(account); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; /** * @dev External interface of AccessControlEnumerable declared to support ERC165 detection. */ interface IAccessControlEnumerable is IAccessControl { /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) external view returns (address); /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { require(paused(), "Pausable: not paused"); } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the default value returned by this function, unless * it's overridden. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer(address from, address to, uint256 amount) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 amount) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol) pragma solidity ^0.8.0; import "../ERC20.sol"; import "../../../utils/Context.sol"; /** * @dev Extension of {ERC20} that allows token holders to destroy both their own * tokens and those that they have an allowance for, in a way that can be * recognized off-chain (via event analysis). */ abstract contract ERC20Burnable is Context, ERC20 { /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { _spendAllowance(account, _msgSender(), amount); _burn(account, amount); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/ERC20Pausable.sol) pragma solidity ^0.8.0; import "../ERC20.sol"; import "../../../security/Pausable.sol"; /** * @dev ERC20 token with pausable token transfers, minting and burning. * * Useful for scenarios such as preventing trades until the end of an evaluation * period, or having an emergency switch for freezing all token transfers in the * event of a large bug. * * IMPORTANT: This contract does not include public pause and unpause functions. In * addition to inheriting this contract, you must define both functions, invoking the * {Pausable-_pause} and {Pausable-_unpause} internal functions, with appropriate * access control, e.g. using {AccessControl} or {Ownable}. Not doing so will * make the contract unpausable. */ abstract contract ERC20Pausable is ERC20, Pausable { /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - the contract must not be paused. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override { super._beforeTokenTransfer(from, to, amount); require(!paused(), "ERC20Pausable: token transfer while paused"); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ 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 v4.9.4) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface 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 v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @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 amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.sol"; import "../../../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 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.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(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, "SafeERC20: low-level call failed"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(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.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ```solidity * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values in the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
{ "optimizer": { "enabled": true, "runs": 1, "details": { "yul": false } }, "evmVersion": "paris", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
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ILayerZeroEndpointV2","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"eid","type":"uint32"},{"internalType":"uint16","name":"msgType","type":"uint16"}],"name":"enforcedOptions","outputs":[{"internalType":"bytes","name":"enforcedOption","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_eid","type":"uint32"},{"internalType":"bytes32","name":"_peer","type":"bytes32"}],"name":"isPeer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"srcEid","type":"uint32"},{"internalType":"bytes32","name":"sender","type":"bytes32"},{"internalType":"uint64","name":"nonce","type":"uint64"}],"internalType":"struct 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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000001a44076050125825900e736c501f859c50fe728c0000000000000000000000000f97d276203408a410d430b5dada7870ae1e45c9
-----Decoded View---------------
Arg [0] : _lzEndpoint (address): 0x1a44076050125825900e736c501f859c50fE728c
Arg [1] : _delegate (address): 0x0f97D276203408a410d430b5dada7870AE1E45C9
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000001a44076050125825900e736c501f859c50fe728c
Arg [1] : 0000000000000000000000000f97d276203408a410d430b5dada7870ae1e45c9
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