Source Code
Overview
ETH Balance
6.321020689682155817 ETH
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Multichain Info
N/A
Latest 21 from a total of 21 transactions
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Set Gas Limit | 6548590 | 152 days ago | IN | 0 ETH | 0.00053941 | ||||
Set Gas Limit | 6516685 | 157 days ago | IN | 0 ETH | 0.00005 | ||||
Set Gas Limit | 6485066 | 162 days ago | IN | 0 ETH | 0.00037982 | ||||
Set Gas Limit | 6403506 | 175 days ago | IN | 0 ETH | 0.00039159 | ||||
Set Gas Limit | 6397310 | 176 days ago | IN | 0 ETH | 0.00019573 | ||||
Set Peer | 6397301 | 176 days ago | IN | 0 ETH | 0.0002143 | ||||
Set Peer | 6397300 | 176 days ago | IN | 0 ETH | 0.00022839 | ||||
Set Peer | 6385324 | 178 days ago | IN | 0 ETH | 0.00009323 | ||||
Set Peer | 6385323 | 178 days ago | IN | 0 ETH | 0.00009733 | ||||
Set Peer | 6385321 | 178 days ago | IN | 0 ETH | 0.00008119 | ||||
Set Peer | 6385318 | 178 days ago | IN | 0 ETH | 0.00008742 | ||||
Initialize | 6385094 | 178 days ago | IN | 0 ETH | 0.00009552 | ||||
Set Gas Limit | 6383815 | 178 days ago | IN | 0 ETH | 0.00041468 | ||||
Set Gas Limit | 6383813 | 178 days ago | IN | 0 ETH | 0.00041495 | ||||
Set Gas Limit | 6383811 | 178 days ago | IN | 0 ETH | 0.00044325 | ||||
Set Gas Limit | 6383810 | 178 days ago | IN | 0 ETH | 0.00043058 | ||||
Set Peer | 6383678 | 178 days ago | IN | 0 ETH | 0.00058951 | ||||
Set Peer | 6383676 | 178 days ago | IN | 0 ETH | 0.00063855 | ||||
Set Peer | 6383674 | 178 days ago | IN | 0 ETH | 0.000642 | ||||
Set Peer | 6383672 | 178 days ago | IN | 0 ETH | 0.00065237 | ||||
Initialize | 6380051 | 179 days ago | IN | 0 ETH | 0.00146583 |
Latest 25 internal transactions (View All)
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7337358 | 29 days ago | 0.0004207 ETH | ||||
7337358 | 29 days ago | 0.00084141 ETH | ||||
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7337352 | 29 days ago | 0.00084141 ETH | ||||
7337318 | 29 days ago | 0.00042064 ETH | ||||
7337318 | 29 days ago | 0.00042064 ETH | ||||
7337306 | 29 days ago | 0.00042064 ETH | ||||
7337306 | 29 days ago | 0.00042064 ETH | ||||
7337256 | 29 days ago | 0.0004207 ETH | ||||
7337256 | 29 days ago | 0.00084141 ETH | ||||
7337253 | 29 days ago | 0.00042064 ETH | ||||
7337253 | 29 days ago | 0.00042064 ETH | ||||
7337245 | 29 days ago | 0.00042064 ETH | ||||
7337245 | 29 days ago | 0.00042064 ETH | ||||
7337200 | 29 days ago | 0.00042064 ETH | ||||
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7337153 | 29 days ago | 0.00042064 ETH | ||||
7337153 | 29 days ago | 0.00042064 ETH | ||||
7337104 | 29 days ago | 0.00042064 ETH | ||||
7337104 | 29 days ago | 0.00042064 ETH | ||||
7337042 | 29 days ago | 0.00042089 ETH | ||||
7337042 | 29 days ago | 0.00084179 ETH | ||||
7337036 | 29 days ago | 0.00042064 ETH | ||||
7337036 | 29 days ago | 0.00042064 ETH | ||||
7337032 | 29 days ago | 0.00042089 ETH |
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Contract Source Code Verified (Exact Match)
Contract Name:
SynthrBridgeLightChainLz
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; import "./BaseBridgeLZ.sol"; import "../../interfaces/ISynthrIssuer.sol"; import "../../interfaces/IExchanger.sol"; import "../../interfaces/IWrappedSynthr.sol"; import "../../libraries/BytesLib.sol"; /** * @title SynthrBridgeLightChainLz * @dev Bridge contract for cross-chain communication using LayerZero in the Synthr protocol */ contract SynthrBridgeLightChainLz is BaseBridgeLZ { using BytesLib for bytes; error Bridging_on_same_chain(); error MarginDelta_should_be_greater_than_zero(); error Unknown_packetType(uint16 packetType); /** * @notice Constructor to initialize the bridge contract * @param _lzEndpoint The LayerZero endpoint address * @param _owner The owner of the contract */ constructor(address _lzEndpoint, address _owner) BaseBridgeLZ(_lzEndpoint, _owner) { lzFeePercentage = 100; } /** * @notice Get the main chain ID * @return The main chain ID */ function mainChainId() external view returns (uint16) { return _mainChainId; } /** * @notice Initialize the contract with the given parameters * @param __synthrAddressResolver The address resolver for Synthr * @param __mainChainId The ID of the main chain * @param __selfLZChainId The ID of the current chain */ function initialize( address __synthrAddressResolver, uint16 __mainChainId, uint16 __selfLZChainId ) external onlyOwner { _mainChainId = __mainChainId; _synthrAddressResolver = __synthrAddressResolver; _selfLZChainId = __selfLZChainId; } function _lzReceive( Origin calldata _origin, bytes32 _guid, bytes calldata _payload, address, bytes calldata ) internal override { uint16 packetType = _getPacketType(_payload); address account; if (packetType == PT_MINT_SYNTH) { // receive mint synth message // from only the main chain (, bytes memory accountBytes, bytes32 synthKey, uint amount) = abi.decode(_payload, (uint16, bytes, bytes32, uint)); account = accountBytes.toAddress(0); ISynthrIssuer(getAddressFromResolver("Issuer")).destIssue(account, synthKey, amount); } else if (packetType == PT_WITHDRAW_COLLATERAL) { // withdraw collateral message // from only the main chain (, bytes memory accountBytes, bytes32 collateralKey, uint amount) = abi.decode(_payload, (uint16, bytes, bytes32, uint)); account = accountBytes.toAddress(0); IWrappedSynthr(getAddressFromResolver("WrappedSynthr")).withdrawCollateral(account, account, collateralKey, amount); } else if (packetType == PT_EXCHANGE) { // exchange syTokens // from every chain (, bytes memory accountBytes, , , bytes32 destKey, uint destAmount, ) = abi.decode(_payload, (uint16, bytes, bytes32, uint, bytes32, uint, uint)); account = accountBytes.toAddress(0); IExchanger(getAddressFromResolver("Exchanger")).updateDestinationForExchange(account, destKey, destAmount); } else if (packetType == PT_LIQUIDATE) { // liquidate collateral // message from only the main chain (, bytes memory accountBytes, bytes32 collateralKey, uint collateralAmount) = abi.decode(_payload, (uint16, bytes, bytes32, uint)); account = accountBytes.toAddress(0); IWrappedSynthr(getAddressFromResolver("WrappedSynthr")).collateralTransfer(account, collateralKey, collateralAmount); } else if (packetType == PT_BRIDGE_SYNTH) { // bridge syToken // message from every chain (, bytes memory accountBytes, bytes32 synthKey, uint amount) = abi.decode(_payload, (uint16, bytes, bytes32, uint)); account = accountBytes.toAddress(0); ISynthrIssuer(getAddressFromResolver("Issuer")).destIssue(account, synthKey, amount); } else if (packetType == PT_WITHDRAW_MARGIN) { (, bytes memory accountBytes, uint amount) = abi.decode(_payload, (uint16, bytes, uint)); account = accountBytes.toAddress(0); // bytes32("sUSD") = 0x7355534400000000000000000000000000000000000000000000000000000000 ISynthrIssuer(getAddressFromResolver("Issuer")).destIssue(account, 0x7355534400000000000000000000000000000000000000000000000000000000, amount); } else if (packetType == PT_CROSS_SWAP_CASE_1) { ( , bytes memory accountBytes, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, // uint16 dstChainId // uint fee , , bytes memory dexPayload, bytes memory dexAddressBytes ) = abi.decode(_payload, (uint16, bytes, bytes32, uint, bytes32, uint, uint16, uint, bytes, bytes)); account = accountBytes.toAddress(0); address dexAddress = dexAddressBytes.toAddress(0); ISynthrSwap(getAddressFromResolver("SynthrSwap")).destSwapSynthToNative(account, srcKey, srcAmount, dstKey, dstAmount, dexAddress, dexPayload); } else if (packetType == PT_CROSS_SWAP_CASE_2) { ( , bytes memory accountBytes, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, // uint16 dstChainId // uint fee , ) = abi.decode(_payload, (uint16, bytes, bytes32, uint, bytes32, uint, uint16, uint)); account = accountBytes.toAddress(0); ISynthrSwap(getAddressFromResolver("SynthrSwap")).destSwapNativeToSynth(account, srcKey, srcAmount, dstKey, dstAmount); } else if (packetType == PT_CROSS_SWAP_CASE_3) { ( , bytes memory accountBytes, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, // uint16 dstChainId // uint fee, , , bytes memory dexPayload, bytes memory dexAddressBytes ) = abi.decode(_payload, (uint16, bytes, bytes32, uint, bytes32, uint, uint16, uint, bytes, bytes)); account = accountBytes.toAddress(0); address dexAddress = dexAddressBytes.toAddress(0); ISynthrSwap(getAddressFromResolver("SynthrSwap")).destSwapNativeToNative(account, srcKey, srcAmount, dstKey, dstAmount, dexAddress, dexPayload); } else if (packetType == PT_CROSS_SWAP_DEX_CASE_1) { ( , bytes memory accountBytes, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, //uint16 dstChainId // uint fee , ) = abi.decode(_payload, (uint16, bytes, bytes32, uint, bytes32, uint, uint16, uint)); account = accountBytes.toAddress(0); ISynthrSwapDex(getAddressFromResolver("SynthrSwapWithDex")).destSwapSynthToNative(account, srcKey, srcAmount, dstKey, dstAmount); } else if (packetType == PT_CROSS_SWAP_DEX_CASE_3) { ( , bytes memory accountBytes, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, // uint16 dstChainId // uint fee , ) = abi.decode(_payload, (uint16, bytes, bytes32, uint, bytes32, uint, uint16, uint)); account = accountBytes.toAddress(0); ISynthrSwapDex(getAddressFromResolver("SynthrSwapWithDex")).destSwapNativeToNative(account, srcKey, srcAmount, dstKey, dstAmount); } else { revert Unknown_packetType(packetType); } { bytes32 path = _getPeerOrRevert(_origin.srcEid); emit ReceivePacket(account, path, _guid, packetType, uint16(_origin.srcEid), _origin.nonce); } } /** * @notice Send a deposit collateral message to the main chain * @param account The account depositing collateral * @param collateralKey The key representing the collateral * @param amount The amount of collateral to deposit * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendDepositCollateral( address account, bytes32 collateralKey, uint amount, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { bytes memory lzPayload = abi.encode(PT_DEPOSIT_COLLATERAL, abi.encodePacked(account), collateralKey, amount); _broadcast(account, lzPayload, PT_DEPOSIT_COLLATERAL, _mainChainId, msg.value, false); } /** * @notice Send a burn synth message to the main chain * @param account The account burning synth tokens * @param synthKey The key representing the synth token * @param amount The amount of synth tokens to burn * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendBurn( address account, bytes32 synthKey, uint amount, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { bytes memory lzPayload = abi.encode(PT_BURN_SYNTH, abi.encodePacked(account), synthKey, amount); _broadcast(account, lzPayload, PT_BURN_SYNTH, _mainChainId, msg.value, false); } /** * @notice Send an exchange message to the destination chain and main chain * @param account The account performing the exchange * @param srcSynthKey The key representing the source synth token * @param dstSynthKey The key representing the destination synth token * @param srcAmount The amount of source synth tokens * @param dstAmount The amount of destination synth tokens * @param reclaimed The amount of tokens reclaimed * @param refund The amount of tokens refunded * @param fee The fee for the exchange * @param dstChainId The destination chain ID * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendExchange( address account, bytes32 srcSynthKey, bytes32 dstSynthKey, uint srcAmount, uint dstAmount, uint reclaimed, uint refund, uint fee, uint16 dstChainId, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { srcAmount += reclaimed - refund; if (dstChainId == 0) { dstChainId = _selfLZChainId; } bytes memory lzPayload = abi.encode(PT_EXCHANGE, abi.encodePacked(account), srcSynthKey, srcAmount, dstSynthKey, dstAmount, fee, dstChainId); uint value = msg.value; if (dstChainId != _selfLZChainId) { uint consumed = _broadcast(account, lzPayload, PT_EXCHANGE, dstChainId, value, false); value -= consumed; } if (dstChainId != _mainChainId) { _broadcast(account, lzPayload, PT_EXCHANGE, _mainChainId, value, false); } } /** * @notice Send a bridge synth token message to the destination chain * @param account The account bridging synth tokens * @param synthKey The key representing the synth token * @param amount The amount of synth tokens to bridge * @param dstChainId The destination chain ID * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendBridgeSyToken( address account, bytes32 synthKey, uint amount, uint16 dstChainId, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { if (dstChainId == 0) { revert Bridging_on_same_chain(); } bytes memory lzPayload = abi.encode(PT_BRIDGE_SYNTH, abi.encodePacked(account), synthKey, amount, dstChainId); uint value = msg.value; uint consumed = _broadcast(account, lzPayload, PT_BRIDGE_SYNTH, dstChainId, value, false); value -= consumed; if (dstChainId != _mainChainId) { _broadcast(account, lzPayload, PT_BRIDGE_SYNTH, _mainChainId, value, false); } } // This function is on only the light chain as we don't need to bridge `transfer margin` message to the other chain /** * @notice Send a transfer margin message to the main chain * @param account The account transferring margin * @param marginDelta The amount of margin to transfer * @param marketKey The key representing the market * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendTransferMargin( address account, uint marginDelta, bytes32 marketKey, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { if (marginDelta <= 0) { revert MarginDelta_should_be_greater_than_zero(); } bytes memory lzPayload = abi.encode(PT_TRANSFER_MARGIN, abi.encodePacked(account), marginDelta, marketKey); _broadcast(account, lzPayload, PT_TRANSFER_MARGIN, _mainChainId, msg.value, false); } // TODO // DO we need to check the hash of the dexPayload? /** * @notice Send a cross-chain swap from synth to native asset * @param account The account performing the swap * @param srcKey The key representing the source synth token * @param srcAmount The amount of source synth tokens * @param dstKey The key representing the destination native asset * @param dstAmount The amount of destination native asset * @param dstChainId The destination chain ID * @param fee The fee for the swap * @param dexPayload The payload data for the DEX * @param dexAddress The address of the DEX * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendCrossSwapSyAssetToNative( address account, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, uint16 dstChainId, uint fee, bytes calldata dexPayload, address dexAddress, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { bytes memory lzPayload = abi.encode( PT_CROSS_SWAP_CASE_1, abi.encodePacked(account), srcKey, srcAmount, dstKey, dstAmount, dstChainId, fee, dexPayload, abi.encodePacked(dexAddress) ); uint value = msg.value; uint consumed = _broadcast(account, lzPayload, PT_CROSS_SWAP_CASE_1, _mainChainId, msg.value, false); value -= consumed; // to the light chain if (dstChainId != _mainChainId) { _broadcast(account, lzPayload, PT_CROSS_SWAP_CASE_1, dstChainId, value, false); } } /** * @notice Send a cross-chain swap from native asset to synth * @param account The account performing the swap * @param srcKey The key representing the source native asset * @param srcAmount The amount of source native asset * @param dstKey The key representing the destination synth token * @param dstAmount The amount of destination synth tokens * @param dstChainId The destination chain ID * @param fee The fee for the swap * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendCrossSwapNativeToSyAsset( address account, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, uint16 dstChainId, uint fee, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { bytes memory lzPayload = abi.encode(PT_CROSS_SWAP_CASE_2, abi.encodePacked(account), srcKey, srcAmount, dstKey, dstAmount, dstChainId, fee); uint value = msg.value; uint consumed = _broadcast(account, lzPayload, PT_CROSS_SWAP_CASE_2, _mainChainId, msg.value, false); value -= consumed; if (dstChainId != _mainChainId) { _broadcast(account, lzPayload, PT_CROSS_SWAP_CASE_2, dstChainId, value, false); } } /** * @notice Send a cross-chain swap from native asset to native asset * @param account The account performing the swap * @param srcKey The key representing the source native asset * @param srcAmount The amount of source native asset * @param dstKey The key representing the destination native asset * @param dstAmount The amount of destination native asset * @param dstChainId The destination chain ID * @param fee The fee for the swap * @param dexAddress The address of the DEX * @param dexPayload The payload data for the DEX * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendCrossSwapNativeToNative( address account, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, uint16 dstChainId, uint fee, address dexAddress, bytes calldata dexPayload, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { bytes memory lzPayload = abi.encode( PT_CROSS_SWAP_CASE_3, abi.encodePacked(account), srcKey, srcAmount, dstKey, dstAmount, dstChainId, fee, dexPayload, abi.encodePacked(dexAddress) ); uint value = msg.value; uint consumed = _broadcast(account, lzPayload, PT_CROSS_SWAP_CASE_3, _mainChainId, value, false); value -= consumed; if (dstChainId != _mainChainId) { _broadcast(account, lzPayload, PT_CROSS_SWAP_CASE_3, dstChainId, value, false); } } /** * @notice Send a cross-chain swap from synth to native asset using a DEX * @param account The account performing the swap * @param srcKey The key representing the source synth token * @param srcAmount The amount of source synth tokens * @param dstKey The key representing the destination native asset * @param dstAmount The amount of destination native asset * @param dstChainId The destination chain ID * @param fee The fee for the swap * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendCrossSwapSyAssetToNativeWithDex( address account, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, uint16 dstChainId, uint fee, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { bytes memory lzPayload = abi.encode(PT_CROSS_SWAP_DEX_CASE_1, abi.encodePacked(account), srcKey, srcAmount, dstKey, dstAmount, dstChainId, fee); uint value = msg.value; uint consumed = _broadcast(account, lzPayload, PT_CROSS_SWAP_DEX_CASE_1, _mainChainId, msg.value, false); value -= consumed; if (dstChainId != _mainChainId) { _broadcast(account, lzPayload, PT_CROSS_SWAP_DEX_CASE_1, dstChainId, value, false); } } /** * @notice Send a cross-chain swap from native asset to native asset using a DEX * @param account The account performing the swap * @param srcKey The key representing the source native asset * @param srcAmount The amount of source native asset * @param dstKey The key representing the destination native asset * @param dstAmount The amount of destination native asset * @param dstChainId The destination chain ID * @param fee The fee for the swap * Boolean indicating if ZRO token payment is used for LayerZero fee */ function sendCrossSwapNativeToNativeWithDex( address account, bytes32 srcKey, uint srcAmount, bytes32 dstKey, uint dstAmount, uint16 dstChainId, uint fee, bool // the param to check ZRO token payment - true: ZRO token payment for LZ fee, false: native token payment for LZ fee ) external payable onlySynthr { bytes memory lzPayload = abi.encode(PT_CROSS_SWAP_DEX_CASE_3, abi.encodePacked(account), srcKey, srcAmount, dstKey, dstAmount, dstChainId, fee); uint value = msg.value; uint consumed = _broadcast(account, lzPayload, PT_CROSS_SWAP_DEX_CASE_3, _mainChainId, value, false); value -= consumed; if (dstChainId != _mainChainId) { _broadcast(account, lzPayload, PT_CROSS_SWAP_DEX_CASE_3, dstChainId, value, false); } } }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { BytesLib } from "solidity-bytes-utils/contracts/BytesLib.sol"; import { BitMap256 } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/BitMaps.sol"; import { CalldataBytesLib } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/CalldataBytesLib.sol"; library DVNOptions { using CalldataBytesLib for bytes; using BytesLib for bytes; uint8 internal constant WORKER_ID = 2; uint8 internal constant OPTION_TYPE_PRECRIME = 1; error DVN_InvalidDVNIdx(); error DVN_InvalidDVNOptions(uint256 cursor); /// @dev group dvn options by its idx /// @param _options [dvn_id][dvn_option][dvn_id][dvn_option]... /// dvn_option = [option_size][dvn_idx][option_type][option] /// option_size = len(dvn_idx) + len(option_type) + len(option) /// dvn_id: uint8, dvn_idx: uint8, option_size: uint16, option_type: uint8, option: bytes /// @return dvnOptions the grouped options, still share the same format of _options /// @return dvnIndices the dvn indices function groupDVNOptionsByIdx( bytes memory _options ) internal pure returns (bytes[] memory dvnOptions, uint8[] memory dvnIndices) { if (_options.length == 0) return (dvnOptions, dvnIndices); uint8 numDVNs = getNumDVNs(_options); // if there is only 1 dvn, we can just return the whole options if (numDVNs == 1) { dvnOptions = new bytes[](1); dvnOptions[0] = _options; dvnIndices = new uint8[](1); dvnIndices[0] = _options.toUint8(3); // dvn idx return (dvnOptions, dvnIndices); } // otherwise, we need to group the options by dvn_idx dvnIndices = new uint8[](numDVNs); dvnOptions = new bytes[](numDVNs); unchecked { uint256 cursor = 0; uint256 start = 0; uint8 lastDVNIdx = 255; // 255 is an invalid dvn_idx while (cursor < _options.length) { ++cursor; // skip worker_id // optionLength asserted in getNumDVNs (skip check) uint16 optionLength = _options.toUint16(cursor); cursor += 2; // dvnIdx asserted in getNumDVNs (skip check) uint8 dvnIdx = _options.toUint8(cursor); // dvnIdx must equal to the lastDVNIdx for the first option // so it is always skipped in the first option // this operation slices out options whenever the scan finds a different lastDVNIdx if (lastDVNIdx == 255) { lastDVNIdx = dvnIdx; } else if (dvnIdx != lastDVNIdx) { uint256 len = cursor - start - 3; // 3 is for worker_id and option_length bytes memory opt = _options.slice(start, len); _insertDVNOptions(dvnOptions, dvnIndices, lastDVNIdx, opt); // reset the start and lastDVNIdx start += len; lastDVNIdx = dvnIdx; } cursor += optionLength; } // skip check the cursor here because the cursor is asserted in getNumDVNs // if we have reached the end of the options, we need to process the last dvn uint256 size = cursor - start; bytes memory op = _options.slice(start, size); _insertDVNOptions(dvnOptions, dvnIndices, lastDVNIdx, op); // revert dvnIndices to start from 0 for (uint8 i = 0; i < numDVNs; ++i) { --dvnIndices[i]; } } } function _insertDVNOptions( bytes[] memory _dvnOptions, uint8[] memory _dvnIndices, uint8 _dvnIdx, bytes memory _newOptions ) internal pure { // dvnIdx starts from 0 but default value of dvnIndices is 0, // so we tell if the slot is empty by adding 1 to dvnIdx if (_dvnIdx == 255) revert DVN_InvalidDVNIdx(); uint8 dvnIdxAdj = _dvnIdx + 1; for (uint256 j = 0; j < _dvnIndices.length; ++j) { uint8 index = _dvnIndices[j]; if (dvnIdxAdj == index) { _dvnOptions[j] = abi.encodePacked(_dvnOptions[j], _newOptions); break; } else if (index == 0) { // empty slot, that means it is the first time we see this dvn _dvnIndices[j] = dvnIdxAdj; _dvnOptions[j] = _newOptions; break; } } } /// @dev get the number of unique dvns /// @param _options the format is the same as groupDVNOptionsByIdx function getNumDVNs(bytes memory _options) internal pure returns (uint8 numDVNs) { uint256 cursor = 0; BitMap256 bitmap; // find number of unique dvn_idx unchecked { while (cursor < _options.length) { ++cursor; // skip worker_id uint16 optionLength = _options.toUint16(cursor); cursor += 2; if (optionLength < 2) revert DVN_InvalidDVNOptions(cursor); // at least 1 byte for dvn_idx and 1 byte for option_type uint8 dvnIdx = _options.toUint8(cursor); // if dvnIdx is not set, increment numDVNs // max num of dvns is 255, 255 is an invalid dvn_idx // The order of the dvnIdx is not required to be sequential, as enforcing the order may weaken // the composability of the options. e.g. if we refrain from enforcing the order, an OApp that has // already enforced certain options can append additional options to the end of the enforced // ones without restrictions. if (dvnIdx == 255) revert DVN_InvalidDVNIdx(); if (!bitmap.get(dvnIdx)) { ++numDVNs; bitmap = bitmap.set(dvnIdx); } cursor += optionLength; } } if (cursor != _options.length) revert DVN_InvalidDVNOptions(cursor); } /// @dev decode the next dvn option from _options starting from the specified cursor /// @param _options the format is the same as groupDVNOptionsByIdx /// @param _cursor the cursor to start decoding /// @return optionType the type of the option /// @return option the option /// @return cursor the cursor to start decoding the next option function nextDVNOption( bytes calldata _options, uint256 _cursor ) internal pure returns (uint8 optionType, bytes calldata option, uint256 cursor) { unchecked { // skip worker id cursor = _cursor + 1; // read option size uint16 size = _options.toU16(cursor); cursor += 2; // read option type optionType = _options.toU8(cursor + 1); // skip dvn_idx // startCursor and endCursor are used to slice the option from _options uint256 startCursor = cursor + 2; // skip option type and dvn_idx uint256 endCursor = cursor + size; option = _options[startCursor:endCursor]; cursor += size; } } }
// 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; import { ILayerZeroReceiver, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroReceiver.sol"; interface IOAppReceiver is ILayerZeroReceiver { /** * @notice Indicates whether an address is an approved composeMsg sender to the Endpoint. * @param _origin The origin information containing the source endpoint and sender address. * - srcEid: The source chain endpoint ID. * - sender: The sender address on the src chain. * - nonce: The nonce of the message. * @param _message The lzReceive payload. * @param _sender The sender address. * @return isSender Is a valid sender. * * @dev Applications can optionally choose to implement a separate composeMsg sender that is NOT the bridging layer. * @dev The default sender IS the OAppReceiver implementer. */ function isComposeMsgSender( Origin calldata _origin, bytes calldata _message, address _sender ) external view returns (bool isSender); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { BytesLib } from "solidity-bytes-utils/contracts/BytesLib.sol"; import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol"; import { ExecutorOptions } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/ExecutorOptions.sol"; import { DVNOptions } from "@layerzerolabs/lz-evm-messagelib-v2/contracts/uln/libs/DVNOptions.sol"; /** * @title OptionsBuilder * @dev Library for building and encoding various message options. */ library OptionsBuilder { using SafeCast for uint256; using BytesLib for bytes; // Constants for options types uint16 internal constant TYPE_1 = 1; // legacy options type 1 uint16 internal constant TYPE_2 = 2; // legacy options type 2 uint16 internal constant TYPE_3 = 3; // Custom error message error InvalidSize(uint256 max, uint256 actual); error InvalidOptionType(uint16 optionType); // Modifier to ensure only options of type 3 are used modifier onlyType3(bytes memory _options) { if (_options.toUint16(0) != TYPE_3) revert InvalidOptionType(_options.toUint16(0)); _; } /** * @dev Creates a new options container with type 3. * @return options The newly created options container. */ function newOptions() internal pure returns (bytes memory) { return abi.encodePacked(TYPE_3); } /** * @dev Adds an executor LZ receive option to the existing options. * @param _options The existing options container. * @param _gas The gasLimit used on the lzReceive() function in the OApp. * @param _value The msg.value passed to the lzReceive() function in the OApp. * @return options The updated options container. * * @dev When multiples of this option are added, they are summed by the executor * eg. if (_gas: 200k, and _value: 1 ether) AND (_gas: 100k, _value: 0.5 ether) are sent in an option to the LayerZeroEndpoint, * that becomes (300k, 1.5 ether) when the message is executed on the remote lzReceive() function. */ function addExecutorLzReceiveOption( bytes memory _options, uint128 _gas, uint128 _value ) internal pure onlyType3(_options) returns (bytes memory) { bytes memory option = ExecutorOptions.encodeLzReceiveOption(_gas, _value); return addExecutorOption(_options, ExecutorOptions.OPTION_TYPE_LZRECEIVE, option); } /** * @dev Adds an executor native drop option to the existing options. * @param _options The existing options container. * @param _amount The amount for the native value that is airdropped to the 'receiver'. * @param _receiver The receiver address for the native drop option. * @return options The updated options container. * * @dev When multiples of this option are added, they are summed by the executor on the remote chain. */ function addExecutorNativeDropOption( bytes memory _options, uint128 _amount, bytes32 _receiver ) internal pure onlyType3(_options) returns (bytes memory) { bytes memory option = ExecutorOptions.encodeNativeDropOption(_amount, _receiver); return addExecutorOption(_options, ExecutorOptions.OPTION_TYPE_NATIVE_DROP, option); } /** * @dev Adds an executor LZ compose option to the existing options. * @param _options The existing options container. * @param _index The index for the lzCompose() function call. * @param _gas The gasLimit for the lzCompose() function call. * @param _value The msg.value for the lzCompose() function call. * @return options The updated options container. * * @dev When multiples of this option are added, they are summed PER index by the executor on the remote chain. * @dev If the OApp sends N lzCompose calls on the remote, you must provide N incremented indexes starting with 0. * ie. When your remote OApp composes (N = 3) messages, you must set this option for index 0,1,2 */ function addExecutorLzComposeOption( bytes memory _options, uint16 _index, uint128 _gas, uint128 _value ) internal pure onlyType3(_options) returns (bytes memory) { bytes memory option = ExecutorOptions.encodeLzComposeOption(_index, _gas, _value); return addExecutorOption(_options, ExecutorOptions.OPTION_TYPE_LZCOMPOSE, option); } /** * @dev Adds an executor ordered execution option to the existing options. * @param _options The existing options container. * @return options The updated options container. */ function addExecutorOrderedExecutionOption( bytes memory _options ) internal pure onlyType3(_options) returns (bytes memory) { return addExecutorOption(_options, ExecutorOptions.OPTION_TYPE_ORDERED_EXECUTION, bytes("")); } /** * @dev Adds a DVN pre-crime option to the existing options. * @param _options The existing options container. * @param _dvnIdx The DVN index for the pre-crime option. * @return options The updated options container. */ function addDVNPreCrimeOption( bytes memory _options, uint8 _dvnIdx ) internal pure onlyType3(_options) returns (bytes memory) { return addDVNOption(_options, _dvnIdx, DVNOptions.OPTION_TYPE_PRECRIME, bytes("")); } /** * @dev Adds an executor option to the existing options. * @param _options The existing options container. * @param _optionType The type of the executor option. * @param _option The encoded data for the executor option. * @return options The updated options container. */ function addExecutorOption( bytes memory _options, uint8 _optionType, bytes memory _option ) internal pure onlyType3(_options) returns (bytes memory) { return abi.encodePacked( _options, ExecutorOptions.WORKER_ID, _option.length.toUint16() + 1, // +1 for optionType _optionType, _option ); } /** * @dev Adds a DVN option to the existing options. * @param _options The existing options container. * @param _dvnIdx The DVN index for the DVN option. * @param _optionType The type of the DVN option. * @param _option The encoded data for the DVN option. * @return options The updated options container. */ function addDVNOption( bytes memory _options, uint8 _dvnIdx, uint8 _optionType, bytes memory _option ) internal pure onlyType3(_options) returns (bytes memory) { return abi.encodePacked( _options, DVNOptions.WORKER_ID, _option.length.toUint16() + 2, // +2 for optionType and dvnIdx _dvnIdx, _optionType, _option ); } /** * @dev Encodes legacy options of type 1. * @param _executionGas The gasLimit value passed to lzReceive(). * @return legacyOptions The encoded legacy options. */ function encodeLegacyOptionsType1(uint256 _executionGas) internal pure returns (bytes memory) { if (_executionGas > type(uint128).max) revert InvalidSize(type(uint128).max, _executionGas); return abi.encodePacked(TYPE_1, _executionGas); } /** * @dev Encodes legacy options of type 2. * @param _executionGas The gasLimit value passed to lzReceive(). * @param _nativeForDst The amount of native air dropped to the receiver. * @param _receiver The _nativeForDst receiver address. * @return legacyOptions The encoded legacy options of type 2. */ function encodeLegacyOptionsType2( uint256 _executionGas, uint256 _nativeForDst, bytes memory _receiver // @dev Use bytes instead of bytes32 in legacy type 2 for _receiver. ) internal pure returns (bytes memory) { if (_executionGas > type(uint128).max) revert InvalidSize(type(uint128).max, _executionGas); if (_nativeForDst > type(uint128).max) revert InvalidSize(type(uint128).max, _nativeForDst); if (_receiver.length > 32) revert InvalidSize(32, _receiver.length); return abi.encodePacked(TYPE_2, _executionGas, _nativeForDst, _receiver); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; // @dev Import the 'MessagingFee' and 'MessagingReceipt' so it's exposed to OApp implementers // solhint-disable-next-line no-unused-import import { OAppSender, MessagingFee, MessagingReceipt } from "./OAppSender.sol"; // @dev Import the 'Origin' so it's exposed to OApp implementers // solhint-disable-next-line no-unused-import import { OAppReceiver, Origin } from "./OAppReceiver.sol"; import { OAppCore } from "./OAppCore.sol"; /** * @title OApp * @dev Abstract contract serving as the base for OApp implementation, combining OAppSender and OAppReceiver functionality. */ abstract contract OApp is OAppSender, OAppReceiver { /** * @dev Constructor to initialize the OApp with the provided endpoint and owner. * @param _endpoint The address of the LOCAL LayerZero endpoint. * @param _delegate The delegate capable of making OApp configurations inside of the endpoint. */ constructor(address _endpoint, address _delegate) OAppCore(_endpoint, _delegate) {} /** * @notice Retrieves the OApp version information. * @return senderVersion The version of the OAppSender.sol implementation. * @return receiverVersion The version of the OAppReceiver.sol implementation. */ function oAppVersion() public pure virtual override(OAppSender, OAppReceiver) returns (uint64 senderVersion, uint64 receiverVersion) { return (SENDER_VERSION, RECEIVER_VERSION); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { IOAppCore, ILayerZeroEndpointV2 } from "./interfaces/IOAppCore.sol"; /** * @title OAppCore * @dev Abstract contract implementing the IOAppCore interface with basic OApp configurations. */ abstract contract OAppCore is IOAppCore, Ownable { // The LayerZero endpoint associated with the given OApp ILayerZeroEndpointV2 public immutable endpoint; // Mapping to store peers associated with corresponding endpoints mapping(uint32 eid => bytes32 peer) public peers; /** * @dev Constructor to initialize the OAppCore with the provided endpoint and delegate. * @param _endpoint The address of the LOCAL Layer Zero endpoint. * @param _delegate The delegate capable of making OApp configurations inside of the endpoint. * * @dev The delegate typically should be set as the owner of the contract. */ constructor(address _endpoint, address _delegate) { endpoint = ILayerZeroEndpointV2(_endpoint); if (_delegate == address(0)) revert InvalidDelegate(); endpoint.setDelegate(_delegate); } /** * @notice Sets the peer address (OApp instance) for a corresponding endpoint. * @param _eid The endpoint ID. * @param _peer The address of the peer to be associated with the corresponding endpoint. * * @dev Only the owner/admin of the OApp can call this function. * @dev Indicates that the peer is trusted to send LayerZero messages to this OApp. * @dev Set this to bytes32(0) to remove the peer address. * @dev Peer is a bytes32 to accommodate non-evm chains. */ function setPeer(uint32 _eid, bytes32 _peer) public virtual onlyOwner { _setPeer(_eid, _peer); } /** * @notice Sets the peer address (OApp instance) for a corresponding endpoint. * @param _eid The endpoint ID. * @param _peer The address of the peer to be associated with the corresponding endpoint. * * @dev Indicates that the peer is trusted to send LayerZero messages to this OApp. * @dev Set this to bytes32(0) to remove the peer address. * @dev Peer is a bytes32 to accommodate non-evm chains. */ function _setPeer(uint32 _eid, bytes32 _peer) internal virtual { peers[_eid] = _peer; emit PeerSet(_eid, _peer); } /** * @notice Internal function to get the peer address associated with a specific endpoint; reverts if NOT set. * ie. the peer is set to bytes32(0). * @param _eid The endpoint ID. * @return peer The address of the peer associated with the specified endpoint. */ function _getPeerOrRevert(uint32 _eid) internal view virtual returns (bytes32) { bytes32 peer = peers[_eid]; if (peer == bytes32(0)) revert NoPeer(_eid); return peer; } /** * @notice Sets the delegate address for the OApp. * @param _delegate The address of the delegate to be set. * * @dev Only the owner/admin of the OApp can call this function. * @dev Provides the ability for a delegate to set configs, on behalf of the OApp, directly on the Endpoint contract. */ function setDelegate(address _delegate) public onlyOwner { endpoint.setDelegate(_delegate); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { IOAppReceiver, Origin } from "./interfaces/IOAppReceiver.sol"; import { OAppCore } from "./OAppCore.sol"; /** * @title OAppReceiver * @dev Abstract contract implementing the ILayerZeroReceiver interface and extending OAppCore for OApp receivers. */ abstract contract OAppReceiver is IOAppReceiver, OAppCore { // Custom error message for when the caller is not the registered endpoint/ error OnlyEndpoint(address addr); // @dev The version of the OAppReceiver implementation. // @dev Version is bumped when changes are made to this contract. uint64 internal constant RECEIVER_VERSION = 2; /** * @notice Retrieves the OApp version information. * @return senderVersion The version of the OAppSender.sol contract. * @return receiverVersion The version of the OAppReceiver.sol contract. * * @dev Providing 0 as the default for OAppSender version. Indicates that the OAppSender is not implemented. * ie. this is a RECEIVE only OApp. * @dev If the OApp uses both OAppSender and OAppReceiver, then this needs to be override returning the correct versions. */ function oAppVersion() public view virtual returns (uint64 senderVersion, uint64 receiverVersion) { return (0, RECEIVER_VERSION); } /** * @notice Indicates whether an address is an approved composeMsg sender to the Endpoint. * @dev _origin The origin information containing the source endpoint and sender address. * - srcEid: The source chain endpoint ID. * - sender: The sender address on the src chain. * - nonce: The nonce of the message. * @dev _message The lzReceive payload. * @param _sender The sender address. * @return isSender Is a valid sender. * * @dev Applications can optionally choose to implement separate composeMsg senders that are NOT the bridging layer. * @dev The default sender IS the OAppReceiver implementer. */ function isComposeMsgSender( Origin calldata /*_origin*/, bytes calldata /*_message*/, address _sender ) public view virtual returns (bool) { return _sender == address(this); } /** * @notice Checks if the path initialization is allowed based on the provided origin. * @param origin The origin information containing the source endpoint and sender address. * @return Whether the path has been initialized. * * @dev This indicates to the endpoint that the OApp has enabled msgs for this particular path to be received. * @dev This defaults to assuming if a peer has been set, its initialized. * Can be overridden by the OApp if there is other logic to determine this. */ function allowInitializePath(Origin calldata origin) public view virtual returns (bool) { return peers[origin.srcEid] == origin.sender; } /** * @notice Retrieves the next nonce for a given source endpoint and sender address. * @dev _srcEid The source endpoint ID. * @dev _sender The sender address. * @return nonce The next nonce. * * @dev The path nonce starts from 1. If 0 is returned it means that there is NO nonce ordered enforcement. * @dev Is required by the off-chain executor to determine the OApp expects msg execution is ordered. * @dev This is also enforced by the OApp. * @dev By default this is NOT enabled. ie. nextNonce is hardcoded to return 0. */ function nextNonce(uint32 /*_srcEid*/, bytes32 /*_sender*/) public view virtual returns (uint64 nonce) { return 0; } /** * @dev Entry point for receiving messages or packets from the endpoint. * @param _origin The origin information containing the source endpoint and sender address. * - srcEid: The source chain endpoint ID. * - sender: The sender address on the src chain. * - nonce: The nonce of the message. * @param _guid The unique identifier for the received LayerZero message. * @param _message The payload of the received message. * @param _executor The address of the executor for the received message. * @param _extraData Additional arbitrary data provided by the corresponding executor. * * @dev Entry point for receiving msg/packet from the LayerZero endpoint. */ function lzReceive( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) public payable virtual { // Ensures that only the endpoint can attempt to lzReceive() messages to this OApp. if (address(endpoint) != msg.sender) revert OnlyEndpoint(msg.sender); // Ensure that the sender matches the expected peer for the source endpoint. if (_getPeerOrRevert(_origin.srcEid) != _origin.sender) revert OnlyPeer(_origin.srcEid, _origin.sender); // Call the internal OApp implementation of lzReceive. _lzReceive(_origin, _guid, _message, _executor, _extraData); } /** * @dev Internal function to implement lzReceive logic without needing to copy the basic parameter validation. */ function _lzReceive( Origin calldata _origin, bytes32 _guid, bytes calldata _message, address _executor, bytes calldata _extraData ) internal virtual; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { SafeERC20, IERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { MessagingParams, MessagingFee, MessagingReceipt } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol"; import { OAppCore } from "./OAppCore.sol"; /** * @title OAppSender * @dev Abstract contract implementing the OAppSender functionality for sending messages to a LayerZero endpoint. */ abstract contract OAppSender is OAppCore { using SafeERC20 for IERC20; // Custom error messages error NotEnoughNative(uint256 msgValue); error LzTokenUnavailable(); // @dev The version of the OAppSender implementation. // @dev Version is bumped when changes are made to this contract. uint64 internal constant SENDER_VERSION = 1; /** * @notice Retrieves the OApp version information. * @return senderVersion The version of the OAppSender.sol contract. * @return receiverVersion The version of the OAppReceiver.sol contract. * * @dev Providing 0 as the default for OAppReceiver version. Indicates that the OAppReceiver is not implemented. * ie. this is a SEND only OApp. * @dev If the OApp uses both OAppSender and OAppReceiver, then this needs to be override returning the correct versions */ function oAppVersion() public view virtual returns (uint64 senderVersion, uint64 receiverVersion) { return (SENDER_VERSION, 0); } /** * @dev Internal function to interact with the LayerZero EndpointV2.quote() for fee calculation. * @param _dstEid The destination endpoint ID. * @param _message The message payload. * @param _options Additional options for the message. * @param _payInLzToken Flag indicating whether to pay the fee in LZ tokens. * @return fee The calculated MessagingFee for the message. * - nativeFee: The native fee for the message. * - lzTokenFee: The LZ token fee for the message. */ function _quote( uint32 _dstEid, bytes memory _message, bytes memory _options, bool _payInLzToken ) internal view virtual returns (MessagingFee memory fee) { return endpoint.quote( MessagingParams(_dstEid, _getPeerOrRevert(_dstEid), _message, _options, _payInLzToken), address(this) ); } /** * @dev Internal function to interact with the LayerZero EndpointV2.send() for sending a message. * @param _dstEid The destination endpoint ID. * @param _message The message payload. * @param _options Additional options for the message. * @param _fee The calculated LayerZero fee for the message. * - nativeFee: The native fee. * - lzTokenFee: The lzToken fee. * @param _refundAddress The address to receive any excess fee values sent to the endpoint. * @return receipt The receipt for the sent message. * - guid: The unique identifier for the sent message. * - nonce: The nonce of the sent message. * - fee: The LayerZero fee incurred for the message. */ function _lzSend( uint32 _dstEid, bytes memory _message, bytes memory _options, MessagingFee memory _fee, address _refundAddress ) internal virtual returns (MessagingReceipt memory receipt) { // @dev Push corresponding fees to the endpoint, any excess is sent back to the _refundAddress from the endpoint. uint256 messageValue = _payNative(_fee.nativeFee); if (_fee.lzTokenFee > 0) _payLzToken(_fee.lzTokenFee); return // solhint-disable-next-line check-send-result endpoint.send{ value: messageValue }( MessagingParams(_dstEid, _getPeerOrRevert(_dstEid), _message, _options, _fee.lzTokenFee > 0), _refundAddress ); } /** * @dev Internal function to pay the native fee associated with the message. * @param _nativeFee The native fee to be paid. * @return nativeFee The amount of native currency paid. * * @dev If the OApp needs to initiate MULTIPLE LayerZero messages in a single transaction, * this will need to be overridden because msg.value would contain multiple lzFees. * @dev Should be overridden in the event the LayerZero endpoint requires a different native currency. * @dev Some EVMs use an ERC20 as a method for paying transactions/gasFees. * @dev The endpoint is EITHER/OR, ie. it will NOT support both types of native payment at a time. */ function _payNative(uint256 _nativeFee) internal virtual returns (uint256 nativeFee) { if (msg.value != _nativeFee) revert NotEnoughNative(msg.value); return _nativeFee; } /** * @dev Internal function to pay the LZ token fee associated with the message. * @param _lzTokenFee The LZ token fee to be paid. * * @dev If the caller is trying to pay in the specified lzToken, then the lzTokenFee is passed to the endpoint. * @dev Any excess sent, is passed back to the specified _refundAddress in the _lzSend(). */ function _payLzToken(uint256 _lzTokenFee) internal virtual { // @dev Cannot cache the token because it is not immutable in the endpoint. address lzToken = endpoint.lzToken(); if (lzToken == address(0)) revert LzTokenUnavailable(); // Pay LZ token fee by sending tokens to the endpoint. IERC20(lzToken).safeTransferFrom(msg.sender, address(endpoint), _lzTokenFee); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; 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; struct SetConfigParam { uint32 eid; uint32 configType; bytes config; } interface IMessageLibManager { struct Timeout { address lib; uint256 expiry; } event LibraryRegistered(address newLib); event DefaultSendLibrarySet(uint32 eid, address newLib); event DefaultReceiveLibrarySet(uint32 eid, address newLib); event DefaultReceiveLibraryTimeoutSet(uint32 eid, address oldLib, uint256 expiry); event SendLibrarySet(address sender, uint32 eid, address newLib); event ReceiveLibrarySet(address receiver, uint32 eid, address newLib); event ReceiveLibraryTimeoutSet(address receiver, uint32 eid, address oldLib, uint256 timeout); function registerLibrary(address _lib) external; function isRegisteredLibrary(address _lib) external view returns (bool); function getRegisteredLibraries() external view returns (address[] memory); function setDefaultSendLibrary(uint32 _eid, address _newLib) external; function defaultSendLibrary(uint32 _eid) external view returns (address); function setDefaultReceiveLibrary(uint32 _eid, address _newLib, uint256 _gracePeriod) external; function defaultReceiveLibrary(uint32 _eid) external view returns (address); function setDefaultReceiveLibraryTimeout(uint32 _eid, address _lib, uint256 _expiry) external; function defaultReceiveLibraryTimeout(uint32 _eid) external view returns (address lib, uint256 expiry); function isSupportedEid(uint32 _eid) external view returns (bool); function isValidReceiveLibrary(address _receiver, uint32 _eid, address _lib) external view returns (bool); /// ------------------- OApp interfaces ------------------- function setSendLibrary(address _oapp, uint32 _eid, address _newLib) external; function getSendLibrary(address _sender, uint32 _eid) external view returns (address lib); function isDefaultSendLibrary(address _sender, uint32 _eid) external view returns (bool); function setReceiveLibrary(address _oapp, uint32 _eid, address _newLib, uint256 _gracePeriod) external; function getReceiveLibrary(address _receiver, uint32 _eid) external view returns (address lib, bool isDefault); function setReceiveLibraryTimeout(address _oapp, uint32 _eid, address _lib, uint256 _expiry) external; function receiveLibraryTimeout(address _receiver, uint32 _eid) external view returns (address lib, uint256 expiry); function setConfig(address _oapp, address _lib, SetConfigParam[] calldata _params) external; function getConfig( address _oapp, address _lib, uint32 _eid, uint32 _configType ) external view returns (bytes memory config); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingChannel { event InboundNonceSkipped(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce); event PacketNilified(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); event PacketBurnt(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); function eid() external view returns (uint32); // this is an emergency function if a message cannot be verified for some reasons // required to provide _nextNonce to avoid race condition function skip(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce) external; function nilify(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function burn(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function nextGuid(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (bytes32); function inboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); function outboundNonce(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (uint64); function inboundPayloadHash( address _receiver, uint32 _srcEid, bytes32 _sender, uint64 _nonce ) external view returns (bytes32); function lazyInboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingComposer { event ComposeSent(address from, address to, bytes32 guid, uint16 index, bytes message); event ComposeDelivered(address from, address to, bytes32 guid, uint16 index); event LzComposeAlert( address indexed from, address indexed to, address indexed executor, bytes32 guid, uint16 index, uint256 gas, uint256 value, bytes message, bytes extraData, bytes reason ); function composeQueue( address _from, address _to, bytes32 _guid, uint16 _index ) external view returns (bytes32 messageHash); function sendCompose(address _to, bytes32 _guid, uint16 _index, bytes calldata _message) external; function lzCompose( address _from, address _to, bytes32 _guid, uint16 _index, bytes calldata _message, bytes calldata _extraData ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingContext { function isSendingMessage() external view returns (bool); function getSendContext() external view returns (uint32 dstEid, address sender); }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; library CalldataBytesLib { function toU8(bytes calldata _bytes, uint256 _start) internal pure returns (uint8) { return uint8(_bytes[_start]); } function toU16(bytes calldata _bytes, uint256 _start) internal pure returns (uint16) { unchecked { uint256 end = _start + 2; return uint16(bytes2(_bytes[_start:end])); } } function toU32(bytes calldata _bytes, uint256 _start) internal pure returns (uint32) { unchecked { uint256 end = _start + 4; return uint32(bytes4(_bytes[_start:end])); } } function toU64(bytes calldata _bytes, uint256 _start) internal pure returns (uint64) { unchecked { uint256 end = _start + 8; return uint64(bytes8(_bytes[_start:end])); } } function toU128(bytes calldata _bytes, uint256 _start) internal pure returns (uint128) { unchecked { uint256 end = _start + 16; return uint128(bytes16(_bytes[_start:end])); } } function toU256(bytes calldata _bytes, uint256 _start) internal pure returns (uint256) { unchecked { uint256 end = _start + 32; return uint256(bytes32(_bytes[_start:end])); } } function toAddr(bytes calldata _bytes, uint256 _start) internal pure returns (address) { unchecked { uint256 end = _start + 20; return address(bytes20(_bytes[_start:end])); } } function toB32(bytes calldata _bytes, uint256 _start) internal pure returns (bytes32) { unchecked { uint256 end = _start + 32; return bytes32(_bytes[_start:end]); } } }
// SPDX-License-Identifier: MIT // modified from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/structs/BitMaps.sol pragma solidity ^0.8.20; type BitMap256 is uint256; using BitMaps for BitMap256 global; library BitMaps { /** * @dev Returns whether the bit at `index` is set. */ function get(BitMap256 bitmap, uint8 index) internal pure returns (bool) { uint256 mask = 1 << index; return BitMap256.unwrap(bitmap) & mask != 0; } /** * @dev Sets the bit at `index`. */ function set(BitMap256 bitmap, uint8 index) internal pure returns (BitMap256) { uint256 mask = 1 << index; return BitMap256.wrap(BitMap256.unwrap(bitmap) | mask); } }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { CalldataBytesLib } from "../../libs/CalldataBytesLib.sol"; library ExecutorOptions { using CalldataBytesLib for bytes; uint8 internal constant WORKER_ID = 1; uint8 internal constant OPTION_TYPE_LZRECEIVE = 1; uint8 internal constant OPTION_TYPE_NATIVE_DROP = 2; uint8 internal constant OPTION_TYPE_LZCOMPOSE = 3; uint8 internal constant OPTION_TYPE_ORDERED_EXECUTION = 4; error Executor_InvalidLzReceiveOption(); error Executor_InvalidNativeDropOption(); error Executor_InvalidLzComposeOption(); /// @dev decode the next executor option from the options starting from the specified cursor /// @param _options [executor_id][executor_option][executor_id][executor_option]... /// executor_option = [option_size][option_type][option] /// option_size = len(option_type) + len(option) /// executor_id: uint8, option_size: uint16, option_type: uint8, option: bytes /// @param _cursor the cursor to start decoding from /// @return optionType the type of the option /// @return option the option of the executor /// @return cursor the cursor to start decoding the next executor option function nextExecutorOption( bytes calldata _options, uint256 _cursor ) internal pure returns (uint8 optionType, bytes calldata option, uint256 cursor) { unchecked { // skip worker id cursor = _cursor + 1; // read option size uint16 size = _options.toU16(cursor); cursor += 2; // read option type optionType = _options.toU8(cursor); // startCursor and endCursor are used to slice the option from _options uint256 startCursor = cursor + 1; // skip option type uint256 endCursor = cursor + size; option = _options[startCursor:endCursor]; cursor += size; } } function decodeLzReceiveOption(bytes calldata _option) internal pure returns (uint128 gas, uint128 value) { if (_option.length != 16 && _option.length != 32) revert Executor_InvalidLzReceiveOption(); gas = _option.toU128(0); value = _option.length == 32 ? _option.toU128(16) : 0; } function decodeNativeDropOption(bytes calldata _option) internal pure returns (uint128 amount, bytes32 receiver) { if (_option.length != 48) revert Executor_InvalidNativeDropOption(); amount = _option.toU128(0); receiver = _option.toB32(16); } function decodeLzComposeOption( bytes calldata _option ) internal pure returns (uint16 index, uint128 gas, uint128 value) { if (_option.length != 18 && _option.length != 34) revert Executor_InvalidLzComposeOption(); index = _option.toU16(0); gas = _option.toU128(2); value = _option.length == 34 ? _option.toU128(18) : 0; } function encodeLzReceiveOption(uint128 _gas, uint128 _value) internal pure returns (bytes memory) { return _value == 0 ? abi.encodePacked(_gas) : abi.encodePacked(_gas, _value); } function encodeNativeDropOption(uint128 _amount, bytes32 _receiver) internal pure returns (bytes memory) { return abi.encodePacked(_amount, _receiver); } function encodeLzComposeOption(uint16 _index, uint128 _gas, uint128 _value) internal pure returns (bytes memory) { return _value == 0 ? abi.encodePacked(_index, _gas) : abi.encodePacked(_index, _gas, _value); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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. */ 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]. */ 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 v4.4.1 (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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol) // This file was procedurally generated from scripts/generate/templates/SafeCast.js. pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. * * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing * all math on `uint256` and `int256` and then downcasting. */ library SafeCast { /** * @dev Returns the downcasted uint248 from uint256, reverting on * overflow (when the input is greater than largest uint248). * * Counterpart to Solidity's `uint248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toUint248(uint256 value) internal pure returns (uint248) { require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits"); return uint248(value); } /** * @dev Returns the downcasted uint240 from uint256, reverting on * overflow (when the input is greater than largest uint240). * * Counterpart to Solidity's `uint240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toUint240(uint256 value) internal pure returns (uint240) { require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits"); return uint240(value); } /** * @dev Returns the downcasted uint232 from uint256, reverting on * overflow (when the input is greater than largest uint232). * * Counterpart to Solidity's `uint232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toUint232(uint256 value) internal pure returns (uint232) { require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits"); return uint232(value); } /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.2._ */ function toUint224(uint256 value) internal pure returns (uint224) { require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits"); return uint224(value); } /** * @dev Returns the downcasted uint216 from uint256, reverting on * overflow (when the input is greater than largest uint216). * * Counterpart to Solidity's `uint216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toUint216(uint256 value) internal pure returns (uint216) { require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits"); return uint216(value); } /** * @dev Returns the downcasted uint208 from uint256, reverting on * overflow (when the input is greater than largest uint208). * * Counterpart to Solidity's `uint208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toUint208(uint256 value) internal pure returns (uint208) { require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits"); return uint208(value); } /** * @dev Returns the downcasted uint200 from uint256, reverting on * overflow (when the input is greater than largest uint200). * * Counterpart to Solidity's `uint200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toUint200(uint256 value) internal pure returns (uint200) { require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits"); return uint200(value); } /** * @dev Returns the downcasted uint192 from uint256, reverting on * overflow (when the input is greater than largest uint192). * * Counterpart to Solidity's `uint192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toUint192(uint256 value) internal pure returns (uint192) { require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits"); return uint192(value); } /** * @dev Returns the downcasted uint184 from uint256, reverting on * overflow (when the input is greater than largest uint184). * * Counterpart to Solidity's `uint184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toUint184(uint256 value) internal pure returns (uint184) { require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits"); return uint184(value); } /** * @dev Returns the downcasted uint176 from uint256, reverting on * overflow (when the input is greater than largest uint176). * * Counterpart to Solidity's `uint176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toUint176(uint256 value) internal pure returns (uint176) { require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits"); return uint176(value); } /** * @dev Returns the downcasted uint168 from uint256, reverting on * overflow (when the input is greater than largest uint168). * * Counterpart to Solidity's `uint168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toUint168(uint256 value) internal pure returns (uint168) { require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits"); return uint168(value); } /** * @dev Returns the downcasted uint160 from uint256, reverting on * overflow (when the input is greater than largest uint160). * * Counterpart to Solidity's `uint160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toUint160(uint256 value) internal pure returns (uint160) { require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits"); return uint160(value); } /** * @dev Returns the downcasted uint152 from uint256, reverting on * overflow (when the input is greater than largest uint152). * * Counterpart to Solidity's `uint152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toUint152(uint256 value) internal pure returns (uint152) { require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits"); return uint152(value); } /** * @dev Returns the downcasted uint144 from uint256, reverting on * overflow (when the input is greater than largest uint144). * * Counterpart to Solidity's `uint144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toUint144(uint256 value) internal pure returns (uint144) { require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits"); return uint144(value); } /** * @dev Returns the downcasted uint136 from uint256, reverting on * overflow (when the input is greater than largest uint136). * * Counterpart to Solidity's `uint136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toUint136(uint256 value) internal pure returns (uint136) { require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits"); return uint136(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v2.5._ */ function toUint128(uint256 value) internal pure returns (uint128) { require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint120 from uint256, reverting on * overflow (when the input is greater than largest uint120). * * Counterpart to Solidity's `uint120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toUint120(uint256 value) internal pure returns (uint120) { require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits"); return uint120(value); } /** * @dev Returns the downcasted uint112 from uint256, reverting on * overflow (when the input is greater than largest uint112). * * Counterpart to Solidity's `uint112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toUint112(uint256 value) internal pure returns (uint112) { require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits"); return uint112(value); } /** * @dev Returns the downcasted uint104 from uint256, reverting on * overflow (when the input is greater than largest uint104). * * Counterpart to Solidity's `uint104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toUint104(uint256 value) internal pure returns (uint104) { require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits"); return uint104(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.2._ */ function toUint96(uint256 value) internal pure returns (uint96) { require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits"); return uint96(value); } /** * @dev Returns the downcasted uint88 from uint256, reverting on * overflow (when the input is greater than largest uint88). * * Counterpart to Solidity's `uint88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toUint88(uint256 value) internal pure returns (uint88) { require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits"); return uint88(value); } /** * @dev Returns the downcasted uint80 from uint256, reverting on * overflow (when the input is greater than largest uint80). * * Counterpart to Solidity's `uint80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toUint80(uint256 value) internal pure returns (uint80) { require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits"); return uint80(value); } /** * @dev Returns the downcasted uint72 from uint256, reverting on * overflow (when the input is greater than largest uint72). * * Counterpart to Solidity's `uint72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toUint72(uint256 value) internal pure returns (uint72) { require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits"); return uint72(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v2.5._ */ function toUint64(uint256 value) internal pure returns (uint64) { require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint56 from uint256, reverting on * overflow (when the input is greater than largest uint56). * * Counterpart to Solidity's `uint56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toUint56(uint256 value) internal pure returns (uint56) { require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits"); return uint56(value); } /** * @dev Returns the downcasted uint48 from uint256, reverting on * overflow (when the input is greater than largest uint48). * * Counterpart to Solidity's `uint48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toUint48(uint256 value) internal pure returns (uint48) { require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits"); return uint48(value); } /** * @dev Returns the downcasted uint40 from uint256, reverting on * overflow (when the input is greater than largest uint40). * * Counterpart to Solidity's `uint40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toUint40(uint256 value) internal pure returns (uint40) { require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits"); return uint40(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v2.5._ */ function toUint32(uint256 value) internal pure returns (uint32) { require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint24 from uint256, reverting on * overflow (when the input is greater than largest uint24). * * Counterpart to Solidity's `uint24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toUint24(uint256 value) internal pure returns (uint24) { require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits"); return uint24(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v2.5._ */ function toUint16(uint256 value) internal pure returns (uint16) { require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v2.5._ */ function toUint8(uint256 value) internal pure returns (uint8) { require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. * * _Available since v3.0._ */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Returns the downcasted int248 from int256, reverting on * overflow (when the input is less than smallest int248 or * greater than largest int248). * * Counterpart to Solidity's `int248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toInt248(int256 value) internal pure returns (int248 downcasted) { downcasted = int248(value); require(downcasted == value, "SafeCast: value doesn't fit in 248 bits"); } /** * @dev Returns the downcasted int240 from int256, reverting on * overflow (when the input is less than smallest int240 or * greater than largest int240). * * Counterpart to Solidity's `int240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toInt240(int256 value) internal pure returns (int240 downcasted) { downcasted = int240(value); require(downcasted == value, "SafeCast: value doesn't fit in 240 bits"); } /** * @dev Returns the downcasted int232 from int256, reverting on * overflow (when the input is less than smallest int232 or * greater than largest int232). * * Counterpart to Solidity's `int232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toInt232(int256 value) internal pure returns (int232 downcasted) { downcasted = int232(value); require(downcasted == value, "SafeCast: value doesn't fit in 232 bits"); } /** * @dev Returns the downcasted int224 from int256, reverting on * overflow (when the input is less than smallest int224 or * greater than largest int224). * * Counterpart to Solidity's `int224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.7._ */ function toInt224(int256 value) internal pure returns (int224 downcasted) { downcasted = int224(value); require(downcasted == value, "SafeCast: value doesn't fit in 224 bits"); } /** * @dev Returns the downcasted int216 from int256, reverting on * overflow (when the input is less than smallest int216 or * greater than largest int216). * * Counterpart to Solidity's `int216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toInt216(int256 value) internal pure returns (int216 downcasted) { downcasted = int216(value); require(downcasted == value, "SafeCast: value doesn't fit in 216 bits"); } /** * @dev Returns the downcasted int208 from int256, reverting on * overflow (when the input is less than smallest int208 or * greater than largest int208). * * Counterpart to Solidity's `int208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toInt208(int256 value) internal pure returns (int208 downcasted) { downcasted = int208(value); require(downcasted == value, "SafeCast: value doesn't fit in 208 bits"); } /** * @dev Returns the downcasted int200 from int256, reverting on * overflow (when the input is less than smallest int200 or * greater than largest int200). * * Counterpart to Solidity's `int200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toInt200(int256 value) internal pure returns (int200 downcasted) { downcasted = int200(value); require(downcasted == value, "SafeCast: value doesn't fit in 200 bits"); } /** * @dev Returns the downcasted int192 from int256, reverting on * overflow (when the input is less than smallest int192 or * greater than largest int192). * * Counterpart to Solidity's `int192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toInt192(int256 value) internal pure returns (int192 downcasted) { downcasted = int192(value); require(downcasted == value, "SafeCast: value doesn't fit in 192 bits"); } /** * @dev Returns the downcasted int184 from int256, reverting on * overflow (when the input is less than smallest int184 or * greater than largest int184). * * Counterpart to Solidity's `int184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toInt184(int256 value) internal pure returns (int184 downcasted) { downcasted = int184(value); require(downcasted == value, "SafeCast: value doesn't fit in 184 bits"); } /** * @dev Returns the downcasted int176 from int256, reverting on * overflow (when the input is less than smallest int176 or * greater than largest int176). * * Counterpart to Solidity's `int176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toInt176(int256 value) internal pure returns (int176 downcasted) { downcasted = int176(value); require(downcasted == value, "SafeCast: value doesn't fit in 176 bits"); } /** * @dev Returns the downcasted int168 from int256, reverting on * overflow (when the input is less than smallest int168 or * greater than largest int168). * * Counterpart to Solidity's `int168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toInt168(int256 value) internal pure returns (int168 downcasted) { downcasted = int168(value); require(downcasted == value, "SafeCast: value doesn't fit in 168 bits"); } /** * @dev Returns the downcasted int160 from int256, reverting on * overflow (when the input is less than smallest int160 or * greater than largest int160). * * Counterpart to Solidity's `int160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toInt160(int256 value) internal pure returns (int160 downcasted) { downcasted = int160(value); require(downcasted == value, "SafeCast: value doesn't fit in 160 bits"); } /** * @dev Returns the downcasted int152 from int256, reverting on * overflow (when the input is less than smallest int152 or * greater than largest int152). * * Counterpart to Solidity's `int152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toInt152(int256 value) internal pure returns (int152 downcasted) { downcasted = int152(value); require(downcasted == value, "SafeCast: value doesn't fit in 152 bits"); } /** * @dev Returns the downcasted int144 from int256, reverting on * overflow (when the input is less than smallest int144 or * greater than largest int144). * * Counterpart to Solidity's `int144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toInt144(int256 value) internal pure returns (int144 downcasted) { downcasted = int144(value); require(downcasted == value, "SafeCast: value doesn't fit in 144 bits"); } /** * @dev Returns the downcasted int136 from int256, reverting on * overflow (when the input is less than smallest int136 or * greater than largest int136). * * Counterpart to Solidity's `int136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toInt136(int256 value) internal pure returns (int136 downcasted) { downcasted = int136(value); require(downcasted == value, "SafeCast: value doesn't fit in 136 bits"); } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v3.1._ */ function toInt128(int256 value) internal pure returns (int128 downcasted) { downcasted = int128(value); require(downcasted == value, "SafeCast: value doesn't fit in 128 bits"); } /** * @dev Returns the downcasted int120 from int256, reverting on * overflow (when the input is less than smallest int120 or * greater than largest int120). * * Counterpart to Solidity's `int120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toInt120(int256 value) internal pure returns (int120 downcasted) { downcasted = int120(value); require(downcasted == value, "SafeCast: value doesn't fit in 120 bits"); } /** * @dev Returns the downcasted int112 from int256, reverting on * overflow (when the input is less than smallest int112 or * greater than largest int112). * * Counterpart to Solidity's `int112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toInt112(int256 value) internal pure returns (int112 downcasted) { downcasted = int112(value); require(downcasted == value, "SafeCast: value doesn't fit in 112 bits"); } /** * @dev Returns the downcasted int104 from int256, reverting on * overflow (when the input is less than smallest int104 or * greater than largest int104). * * Counterpart to Solidity's `int104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toInt104(int256 value) internal pure returns (int104 downcasted) { downcasted = int104(value); require(downcasted == value, "SafeCast: value doesn't fit in 104 bits"); } /** * @dev Returns the downcasted int96 from int256, reverting on * overflow (when the input is less than smallest int96 or * greater than largest int96). * * Counterpart to Solidity's `int96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.7._ */ function toInt96(int256 value) internal pure returns (int96 downcasted) { downcasted = int96(value); require(downcasted == value, "SafeCast: value doesn't fit in 96 bits"); } /** * @dev Returns the downcasted int88 from int256, reverting on * overflow (when the input is less than smallest int88 or * greater than largest int88). * * Counterpart to Solidity's `int88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toInt88(int256 value) internal pure returns (int88 downcasted) { downcasted = int88(value); require(downcasted == value, "SafeCast: value doesn't fit in 88 bits"); } /** * @dev Returns the downcasted int80 from int256, reverting on * overflow (when the input is less than smallest int80 or * greater than largest int80). * * Counterpart to Solidity's `int80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toInt80(int256 value) internal pure returns (int80 downcasted) { downcasted = int80(value); require(downcasted == value, "SafeCast: value doesn't fit in 80 bits"); } /** * @dev Returns the downcasted int72 from int256, reverting on * overflow (when the input is less than smallest int72 or * greater than largest int72). * * Counterpart to Solidity's `int72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toInt72(int256 value) internal pure returns (int72 downcasted) { downcasted = int72(value); require(downcasted == value, "SafeCast: value doesn't fit in 72 bits"); } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v3.1._ */ function toInt64(int256 value) internal pure returns (int64 downcasted) { downcasted = int64(value); require(downcasted == value, "SafeCast: value doesn't fit in 64 bits"); } /** * @dev Returns the downcasted int56 from int256, reverting on * overflow (when the input is less than smallest int56 or * greater than largest int56). * * Counterpart to Solidity's `int56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toInt56(int256 value) internal pure returns (int56 downcasted) { downcasted = int56(value); require(downcasted == value, "SafeCast: value doesn't fit in 56 bits"); } /** * @dev Returns the downcasted int48 from int256, reverting on * overflow (when the input is less than smallest int48 or * greater than largest int48). * * Counterpart to Solidity's `int48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toInt48(int256 value) internal pure returns (int48 downcasted) { downcasted = int48(value); require(downcasted == value, "SafeCast: value doesn't fit in 48 bits"); } /** * @dev Returns the downcasted int40 from int256, reverting on * overflow (when the input is less than smallest int40 or * greater than largest int40). * * Counterpart to Solidity's `int40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toInt40(int256 value) internal pure returns (int40 downcasted) { downcasted = int40(value); require(downcasted == value, "SafeCast: value doesn't fit in 40 bits"); } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v3.1._ */ function toInt32(int256 value) internal pure returns (int32 downcasted) { downcasted = int32(value); require(downcasted == value, "SafeCast: value doesn't fit in 32 bits"); } /** * @dev Returns the downcasted int24 from int256, reverting on * overflow (when the input is less than smallest int24 or * greater than largest int24). * * Counterpart to Solidity's `int24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toInt24(int256 value) internal pure returns (int24 downcasted) { downcasted = int24(value); require(downcasted == value, "SafeCast: value doesn't fit in 24 bits"); } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v3.1._ */ function toInt16(int256 value) internal pure returns (int16 downcasted) { downcasted = int16(value); require(downcasted == value, "SafeCast: value doesn't fit in 16 bits"); } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v3.1._ */ function toInt8(int256 value) internal pure returns (int8 downcasted) { downcasted = int8(value); require(downcasted == value, "SafeCast: value doesn't fit in 8 bits"); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. * * _Available since v3.0._ */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256"); return int256(value); } }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; import "@openzeppelin/contracts/access/Ownable.sol"; import "../libraries/TransferHelper.sol"; import "../interfaces/ISynthrSwap.sol"; import "../interfaces/ISynthrSwapDex.sol"; import "../interfaces/IFuturesMarketManager.sol"; interface IAddressResolver { function getAddress(bytes32 name) external view returns (address); } abstract contract BaseBridge is Ownable { error Invalid_caller(); address public _synthrAddressResolver; uint16 internal constant PT_DEPOSIT_COLLATERAL = 1; uint16 internal constant PT_MINT_SYNTH = 2; uint16 internal constant PT_WITHDRAW_COLLATERAL = 3; uint16 internal constant PT_BURN_SYNTH = 4; uint16 internal constant PT_EXCHANGE = 5; uint16 internal constant PT_LIQUIDATE = 6; uint16 internal constant PT_BRIDGE_SYNTH = 7; uint16 internal constant PT_TRANSFER_MARGIN = 9; uint16 internal constant PT_WITHDRAW_MARGIN = 10; uint16 internal constant PT_CROSS_SWAP_CASE_1 = 11; uint16 internal constant PT_CROSS_SWAP_CASE_2 = 12; uint16 internal constant PT_CROSS_SWAP_CASE_3 = 13; uint16 internal constant PT_CROSS_SWAP_DEX_CASE_1 = 14; uint16 internal constant PT_CROSS_SWAP_DEX_CASE_3 = 15; constructor() {} modifier onlySynthr() { if (isAllowedCaller(msg.sender)) { _; } else { revert Invalid_caller(); } } receive() external payable {} function isAllowedCaller(address caller) private view returns (bool) { return caller == getAddressFromResolver("WrappedSynthr") || caller == getAddressFromResolver("Issuer") || caller == getAddressFromResolver("Exchanger") || caller == getAddressFromResolver("SynthrSwap") || caller == getAddressFromResolver("SynthrSwapWithDex") || caller == getAddressFromResolver("OffChainExchanger") || caller == getAddressFromResolver("FuturesMarketManager") || IFuturesMarketManager(getAddressFromResolver("FuturesMarketManager")).isMarketImplementation(caller); } function getAddressFromResolver(bytes32 name) internal view returns (address) { return IAddressResolver(_synthrAddressResolver).getAddress(name); } /** * @notice Calculate the fee for a given payload and packet type * @param payload The payload to calculate the fee for * @param packetType The packet type * @param dstChainId The destination chain ID * @return The calculated fee */ function calcFee( bytes memory payload, uint16 packetType, uint16 dstChainId ) public view virtual returns (uint); /** * @notice Withdraw a specified amount of a given token * @param token The address of the token to withdraw * @param amount The amount to withdraw */ function withdrawAsset(address token, uint amount) public onlyOwner { if (token == address(0)) { TransferHelper.safeTransferETH(msg.sender, amount); } else { TransferHelper.safeTransfer(token, msg.sender, amount); } } }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; // import "@layerzerolabs/solidity-examples/contracts/lzApp/NonblockingLzApp.sol"; import {OApp, MessagingFee, Origin} from "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/OApp.sol"; import {MessagingReceipt} from "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/OAppSender.sol"; import {OptionsBuilder} from "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/libs/OptionsBuilder.sol"; import "../BaseBridge.sol"; /** * @title BaseBridgeLZ * @dev Base Bridge contract for cross-chain communication using LayerZero */ abstract contract BaseBridgeLZ is BaseBridge, OApp { using OptionsBuilder for bytes; error Bridge_limit_not_set_for_endpoint(uint32 endPoint); error Fee_Percentage_should_be_more_than_hundred(); error Invalid_gasLimit_to_set(); error Invalid_crossChainFee_attached(uint256 attached, uint256 expected); uint16 internal _selfLZChainId; uint16 public lzFeePercentage; uint16 internal _mainChainId; mapping(uint32 destinationEps => uint128 gasLimit) gasLimits; event SendPacket( address indexed account, bytes32 path, bytes32 guid, uint16 indexed packetType, uint16 indexed dstEid, uint64 nonce ); event ReceivePacket( address indexed account, bytes32 path, bytes32 guid, uint16 indexed packetType, uint16 indexed srcChainId, uint64 nonce ); constructor(address _lzEndpoint, address _owner) OApp(_lzEndpoint, _owner) {} /** * @notice Get the LayerZero chain ID of the current chain * @return The LayerZero chain ID */ function selfLZChainId() external view returns (uint16) { return _selfLZChainId; } /** * @notice Get the options for a given destination endpoint * @param _destinationEP The destination endpoint * @return options The options for the destination endpoint */ function getOptions(uint32 _destinationEP) public view returns (bytes memory options) { uint128 gasLimit = gasLimits[_destinationEP]; if (gasLimit == 0) { revert Bridge_limit_not_set_for_endpoint(_destinationEP); } options = OptionsBuilder.newOptions().addExecutorLzReceiveOption(gasLimit, 0); } /** * @notice Set the LayerZero fee percentage * @param _percentage The fee percentage (must be at least 100) */ function setLZFeePercentage(uint16 _percentage) public { if (_percentage < 100) { revert Fee_Percentage_should_be_more_than_hundred(); } lzFeePercentage = _percentage; } /** * @notice Set the gas limit for a given destination endpoint * @param _destinationEP The destination endpoint * @param _gasLimit The gas limit to set */ function setGasLimit(uint32 _destinationEP, uint128 _gasLimit) external onlyOwner { if (_gasLimit <= 0) { revert Invalid_gasLimit_to_set(); } gasLimits[_destinationEP] = _gasLimit; } /** * @notice Calculate the LayerZero fee for a given payload * @param lzPayload The LayerZero payload * @param packetType The packet type * @param dstEid The destination endpoint ID * @return lzFee The calculated LayerZero fee */ function calcFee(bytes memory lzPayload, uint16 packetType, uint16 dstEid) public view override returns (uint256 lzFee) { bytes memory _options = getOptions(dstEid); MessagingFee memory fee = _quote(dstEid, lzPayload, _options, false); if (_checkMultiBroadcast(packetType)) { fee.nativeFee += (_quote(_mainChainId, lzPayload, getOptions(_mainChainId), false)).nativeFee; } lzFee = fee.nativeFee * lzFeePercentage / 100; } // check for different packetTypes to invoke 2-way cross transaction in case of lightchain <> lightchain function _checkMultiBroadcast(uint16 _packetType) private view returns (bool isAllowed) { if ( ( _packetType == PT_EXCHANGE || _packetType == PT_BRIDGE_SYNTH || _packetType == PT_CROSS_SWAP_CASE_1 || _packetType == PT_CROSS_SWAP_CASE_2 || _packetType == PT_CROSS_SWAP_CASE_3 || _packetType == PT_CROSS_SWAP_DEX_CASE_1 || _packetType == PT_CROSS_SWAP_DEX_CASE_3 ) && (_selfLZChainId != _mainChainId) ) { isAllowed = true; } } /** * @return Consumed native gas in crosschain transaction */ function _broadcast( address account, bytes memory lzPayload, uint16 packetType, uint16 dstEid, uint256 value, bool // the param to check ZRO token payment ) internal returns (uint256) { bytes memory _options = getOptions(dstEid); MessagingFee memory fee = _quote(dstEid, lzPayload, _options, false); if (value < fee.nativeFee) { revert Invalid_crossChainFee_attached(value, fee.nativeFee); } MessagingReceipt memory receipt = _lzSend(dstEid, lzPayload, _options, MessagingFee(fee.nativeFee, 0), payable(address(this))); { bytes32 path = _getPeerOrRevert(dstEid); emit SendPacket(account, path, receipt.guid, packetType, dstEid, receipt.nonce); } return receipt.fee.nativeFee; } function _getPacketType(bytes memory _payload) internal pure returns (uint16 _packetType) { assembly { _packetType := mload(add(_payload, 32)) } } // overrided _payNative for multiple cross chain transactions {bridge, exchange in lightchain} function _payNative(uint256 _nativeFee) internal override returns (uint256 nativeFee) { if (msg.value < _nativeFee) revert NotEnoughNative(msg.value); return _nativeFee; } }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; interface IExchanger { function updateDestinationForExchange( address recipient, bytes32 destinationKey, uint destinationAmount ) external; }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; interface IFuturesMarketManager { function marketForKey(bytes32 marketKey) external view returns (address); function isMarketImplementation(address _account) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; interface ISynthrIssuer { function synthsByAddress(address synthAddress) external view returns (bytes32); function destIssue( address account, bytes32 synthKey, uint synthAmount ) external; }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; interface ISynthrSwap { function destSwapSynthToNative( address account, bytes32 sourceKey, uint sourceAmount, bytes32 destKey, uint destAmount, address target, bytes memory data ) external returns (bool); function destSwapNativeToSynth( address account, bytes32 sourceKey, uint sourceAmount, bytes32 destKey, uint destAmount ) external; function destSwapNativeToNative( address account, bytes32 sourceKey, uint sourceAmount, bytes32 destKey, uint destAmount, address target, bytes memory data ) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; interface ISynthrSwapDex { function destSwapSynthToNative( address account, bytes32 sourceKey, uint sourceAmount, bytes32 destKey, uint destAmount ) external returns (bool); function destSwapNativeToNative( address account, bytes32 sourceKey, uint sourceAmount, bytes32 destKey, uint destAmount ) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity =0.8.24; interface IWrappedSynthr { function getAvailableCollaterals() external view returns (bytes32[] memory); function withdrawCollateral( address from, address to, bytes32 collateralKey, uint collateralAmount ) external; function collateralTransfer( address _from, bytes32 _collateralKey, uint _collateralAmount ) external; function destBurn( address account, bytes32 synthKey, uint amount ) external returns (bool); function destTransferMargin( address account, uint marginDelta, bytes32 marketKey ) external returns (bool); }
// SPDX-License-Identifier: Unlicense /* * @title Solidity Bytes Arrays Utils * @author Gonçalo Sá <[email protected]> * * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity. * The library lets you concatenate, slice and type cast bytes arrays both in memory and storage. */ pragma solidity =0.8.24; library BytesLib { function concat(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bytes memory) { bytes memory tempBytes; assembly { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // Store the length of the first bytes array at the beginning of // the memory for tempBytes. let length := mload(_preBytes) mstore(tempBytes, length) // Maintain a memory counter for the current write location in the // temp bytes array by adding the 32 bytes for the array length to // the starting location. let mc := add(tempBytes, 0x20) // Stop copying when the memory counter reaches the length of the // first bytes array. let end := add(mc, length) for { // Initialize a copy counter to the start of the _preBytes data, // 32 bytes into its memory. let cc := add(_preBytes, 0x20) } lt(mc, end) { // Increase both counters by 32 bytes each iteration. mc := add(mc, 0x20) cc := add(cc, 0x20) } { // Write the _preBytes data into the tempBytes memory 32 bytes // at a time. mstore(mc, mload(cc)) } // Add the length of _postBytes to the current length of tempBytes // and store it as the new length in the first 32 bytes of the // tempBytes memory. length := mload(_postBytes) mstore(tempBytes, add(length, mload(tempBytes))) // Move the memory counter back from a multiple of 0x20 to the // actual end of the _preBytes data. mc := end // Stop copying when the memory counter reaches the new combined // length of the arrays. end := add(mc, length) for { let cc := add(_postBytes, 0x20) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } // Update the free-memory pointer by padding our last write location // to 32 bytes: add 31 bytes to the end of tempBytes to move to the // next 32 byte block, then round down to the nearest multiple of // 32. If the sum of the length of the two arrays is zero then add // one before rounding down to leave a blank 32 bytes (the length block with 0). mstore( 0x40, and( add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31) // Round down to the nearest 32 bytes. ) ) } return tempBytes; } function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal { assembly { // Read the first 32 bytes of _preBytes storage, which is the length // of the array. (We don't need to use the offset into the slot // because arrays use the entire slot.) let fslot := sload(_preBytes.slot) // Arrays of 31 bytes or less have an even value in their slot, // while longer arrays have an odd value. The actual length is // the slot divided by two for odd values, and the lowest order // byte divided by two for even values. // If the slot is even, bitwise and the slot with 255 and divide by // two to get the length. If the slot is odd, bitwise and the slot // with -1 and divide by two. let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) let newlength := add(slength, mlength) // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage switch add(lt(slength, 32), lt(newlength, 32)) case 2 { // Since the new array still fits in the slot, we just need to // update the contents of the slot. // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length sstore( _preBytes.slot, // all the modifications to the slot are inside this // next block add( // we can just add to the slot contents because the // bytes we want to change are the LSBs fslot, add( mul( div( // load the bytes from memory mload(add(_postBytes, 0x20)), // zero all bytes to the right exp(0x100, sub(32, mlength)) ), // and now shift left the number of bytes to // leave space for the length in the slot exp(0x100, sub(32, newlength)) ), // increase length by the double of the memory // bytes length mul(mlength, 2) ) ) ) } case 1 { // The stored value fits in the slot, but the combined value // will exceed it. // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // The contents of the _postBytes array start 32 bytes into // the structure. Our first read should obtain the `submod` // bytes that can fit into the unused space in the last word // of the stored array. To get this, we read 32 bytes starting // from `submod`, so the data we read overlaps with the array // contents by `submod` bytes. Masking the lowest-order // `submod` bytes allows us to add that value directly to the // stored value. let submod := sub(32, slength) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore( sc, add( and(fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00), and(mload(mc), mask) ) ) for { mc := add(mc, 0x20) sc := add(sc, 1) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } default { // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) // Start copying to the last used word of the stored array. let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // Copy over the first `submod` bytes of the new data as in // case 1 above. let slengthmod := mod(slength, 32) let mlengthmod := mod(mlength, 32) let submod := sub(32, slengthmod) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore(sc, add(sload(sc), and(mload(mc), mask))) for { sc := add(sc, 1) mc := add(mc, 0x20) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } } } function slice(bytes memory _bytes, uint256 _start, uint256 _length) internal pure returns (bytes memory) { require(_length + 31 >= _length, "slice_overflow"); require(_bytes.length >= _start + _length, "slice_outOfBounds"); bytes memory tempBytes; assembly { switch iszero(_length) case 0 { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // The first word of the slice result is potentially a partial // word read from the original array. To read it, we calculate // the length of that partial word and start copying that many // bytes into the array. The first word we copy will start with // data we don't care about, but the last `lengthmod` bytes will // land at the beginning of the contents of the new array. When // we're done copying, we overwrite the full first word with // the actual length of the slice. let lengthmod := and(_length, 31) // The multiplication in the next line is necessary // because when slicing multiples of 32 bytes (lengthmod == 0) // the following copy loop was copying the origin's length // and then ending prematurely not copying everything it should. let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod))) let end := add(mc, _length) for { // The multiplication in the next line has the same exact purpose // as the one above. let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } mstore(tempBytes, _length) //update free-memory pointer //allocating the array padded to 32 bytes like the compiler does now mstore(0x40, and(add(mc, 31), not(31))) } //if we want a zero-length slice let's just return a zero-length array default { tempBytes := mload(0x40) //zero out the 32 bytes slice we are about to return //we need to do it because Solidity does not garbage collect mstore(tempBytes, 0) mstore(0x40, add(tempBytes, 0x20)) } } return tempBytes; } function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) { require(_bytes.length >= _start + 20, "toAddress_outOfBounds"); address tempAddress; assembly { tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000) } return tempAddress; } function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) { require(_bytes.length >= _start + 1, "toUint8_outOfBounds"); uint8 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x1), _start)) } return tempUint; } function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) { require(_bytes.length >= _start + 2, "toUint16_outOfBounds"); uint16 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x2), _start)) } return tempUint; } function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) { require(_bytes.length >= _start + 4, "toUint32_outOfBounds"); uint32 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x4), _start)) } return tempUint; } function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) { require(_bytes.length >= _start + 8, "toUint64_outOfBounds"); uint64 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x8), _start)) } return tempUint; } function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) { require(_bytes.length >= _start + 12, "toUint96_outOfBounds"); uint96 tempUint; assembly { tempUint := mload(add(add(_bytes, 0xc), _start)) } return tempUint; } function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) { require(_bytes.length >= _start + 16, "toUint128_outOfBounds"); uint128 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x10), _start)) } return tempUint; } function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) { require(_bytes.length >= _start + 32, "toUint256_outOfBounds"); uint256 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x20), _start)) } return tempUint; } function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) { require(_bytes.length >= _start + 32, "toBytes32_outOfBounds"); bytes32 tempBytes32; assembly { tempBytes32 := mload(add(add(_bytes, 0x20), _start)) } return tempBytes32; } function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let mc := add(_preBytes, 0x20) let end := add(mc, length) for { let cc := add(_postBytes, 0x20) } // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) eq(add(lt(mc, end), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } } default { // unsuccess: success := 0 } } return success; } function equal_nonAligned(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let endMinusWord := add(_preBytes, length) let mc := add(_preBytes, 0x20) let cc := add(_postBytes, 0x20) for { // the next line is the loop condition: // while(uint256(mc < endWord) + cb == 2) } eq(add(lt(mc, endMinusWord), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } // Only if still successful // For <1 word tail bytes if gt(success, 0) { // Get the remainder of length/32 // length % 32 = AND(length, 32 - 1) let numTailBytes := and(length, 0x1f) let mcRem := mload(mc) let ccRem := mload(cc) for { let i := 0 } // the next line is the loop condition: // while(uint256(i < numTailBytes) + cb == 2) eq(add(lt(i, numTailBytes), cb), 2) { i := add(i, 1) } { if iszero(eq(byte(i, mcRem), byte(i, ccRem))) { // unsuccess: success := 0 cb := 0 } } } } default { // unsuccess: success := 0 } } return success; } function equalStorage(bytes storage _preBytes, bytes memory _postBytes) internal view returns (bool) { bool success = true; assembly { // we know _preBytes_offset is 0 let fslot := sload(_preBytes.slot) // Decode the length of the stored array like in concatStorage(). let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) // if lengths don't match the arrays are not equal switch eq(slength, mlength) case 1 { // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage if iszero(iszero(slength)) { switch lt(slength, 32) case 1 { // blank the last byte which is the length fslot := mul(div(fslot, 0x100), 0x100) if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) { // unsuccess: success := 0 } } default { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := keccak256(0x0, 0x20) let mc := add(_postBytes, 0x20) let end := add(mc, mlength) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) for {} eq(add(lt(mc, end), cb), 2) { sc := add(sc, 1) mc := add(mc, 0x20) } { if iszero(eq(sload(sc), mload(mc))) { // unsuccess: success := 0 cb := 0 } } } } } default { // unsuccess: success := 0 } } return success; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity =0.8.24; library TransferHelper { function safeTransfer( address token, address to, uint value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper::safeTransfer: transfer failed"); } function safeTransferETH(address to, uint value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, "TransferHelper::safeTransferETH: ETH transfer failed"); } }
// SPDX-License-Identifier: Unlicense /* * @title Solidity Bytes Arrays Utils * @author Gonçalo Sá <[email protected]> * * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity. * The library lets you concatenate, slice and type cast bytes arrays both in memory and storage. */ pragma solidity >=0.8.0 <0.9.0; library BytesLib { function concat( bytes memory _preBytes, bytes memory _postBytes ) internal pure returns (bytes memory) { bytes memory tempBytes; assembly { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // Store the length of the first bytes array at the beginning of // the memory for tempBytes. let length := mload(_preBytes) mstore(tempBytes, length) // Maintain a memory counter for the current write location in the // temp bytes array by adding the 32 bytes for the array length to // the starting location. let mc := add(tempBytes, 0x20) // Stop copying when the memory counter reaches the length of the // first bytes array. let end := add(mc, length) for { // Initialize a copy counter to the start of the _preBytes data, // 32 bytes into its memory. let cc := add(_preBytes, 0x20) } lt(mc, end) { // Increase both counters by 32 bytes each iteration. mc := add(mc, 0x20) cc := add(cc, 0x20) } { // Write the _preBytes data into the tempBytes memory 32 bytes // at a time. mstore(mc, mload(cc)) } // Add the length of _postBytes to the current length of tempBytes // and store it as the new length in the first 32 bytes of the // tempBytes memory. length := mload(_postBytes) mstore(tempBytes, add(length, mload(tempBytes))) // Move the memory counter back from a multiple of 0x20 to the // actual end of the _preBytes data. mc := end // Stop copying when the memory counter reaches the new combined // length of the arrays. end := add(mc, length) for { let cc := add(_postBytes, 0x20) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } // Update the free-memory pointer by padding our last write location // to 32 bytes: add 31 bytes to the end of tempBytes to move to the // next 32 byte block, then round down to the nearest multiple of // 32. If the sum of the length of the two arrays is zero then add // one before rounding down to leave a blank 32 bytes (the length block with 0). mstore(0x40, and( add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31) // Round down to the nearest 32 bytes. )) } return tempBytes; } function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal { assembly { // Read the first 32 bytes of _preBytes storage, which is the length // of the array. (We don't need to use the offset into the slot // because arrays use the entire slot.) let fslot := sload(_preBytes.slot) // Arrays of 31 bytes or less have an even value in their slot, // while longer arrays have an odd value. The actual length is // the slot divided by two for odd values, and the lowest order // byte divided by two for even values. // If the slot is even, bitwise and the slot with 255 and divide by // two to get the length. If the slot is odd, bitwise and the slot // with -1 and divide by two. let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) let newlength := add(slength, mlength) // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage switch add(lt(slength, 32), lt(newlength, 32)) case 2 { // Since the new array still fits in the slot, we just need to // update the contents of the slot. // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length sstore( _preBytes.slot, // all the modifications to the slot are inside this // next block add( // we can just add to the slot contents because the // bytes we want to change are the LSBs fslot, add( mul( div( // load the bytes from memory mload(add(_postBytes, 0x20)), // zero all bytes to the right exp(0x100, sub(32, mlength)) ), // and now shift left the number of bytes to // leave space for the length in the slot exp(0x100, sub(32, newlength)) ), // increase length by the double of the memory // bytes length mul(mlength, 2) ) ) ) } case 1 { // The stored value fits in the slot, but the combined value // will exceed it. // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // The contents of the _postBytes array start 32 bytes into // the structure. Our first read should obtain the `submod` // bytes that can fit into the unused space in the last word // of the stored array. To get this, we read 32 bytes starting // from `submod`, so the data we read overlaps with the array // contents by `submod` bytes. Masking the lowest-order // `submod` bytes allows us to add that value directly to the // stored value. let submod := sub(32, slength) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore( sc, add( and( fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00 ), and(mload(mc), mask) ) ) for { mc := add(mc, 0x20) sc := add(sc, 1) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } default { // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) // Start copying to the last used word of the stored array. let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // Copy over the first `submod` bytes of the new data as in // case 1 above. let slengthmod := mod(slength, 32) let mlengthmod := mod(mlength, 32) let submod := sub(32, slengthmod) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore(sc, add(sload(sc), and(mload(mc), mask))) for { sc := add(sc, 1) mc := add(mc, 0x20) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } } } function slice( bytes memory _bytes, uint256 _start, uint256 _length ) internal pure returns (bytes memory) { require(_length + 31 >= _length, "slice_overflow"); require(_bytes.length >= _start + _length, "slice_outOfBounds"); bytes memory tempBytes; assembly { switch iszero(_length) case 0 { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // The first word of the slice result is potentially a partial // word read from the original array. To read it, we calculate // the length of that partial word and start copying that many // bytes into the array. The first word we copy will start with // data we don't care about, but the last `lengthmod` bytes will // land at the beginning of the contents of the new array. When // we're done copying, we overwrite the full first word with // the actual length of the slice. let lengthmod := and(_length, 31) // The multiplication in the next line is necessary // because when slicing multiples of 32 bytes (lengthmod == 0) // the following copy loop was copying the origin's length // and then ending prematurely not copying everything it should. let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod))) let end := add(mc, _length) for { // The multiplication in the next line has the same exact purpose // as the one above. let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } mstore(tempBytes, _length) //update free-memory pointer //allocating the array padded to 32 bytes like the compiler does now mstore(0x40, and(add(mc, 31), not(31))) } //if we want a zero-length slice let's just return a zero-length array default { tempBytes := mload(0x40) //zero out the 32 bytes slice we are about to return //we need to do it because Solidity does not garbage collect mstore(tempBytes, 0) mstore(0x40, add(tempBytes, 0x20)) } } return tempBytes; } function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) { require(_bytes.length >= _start + 20, "toAddress_outOfBounds"); address tempAddress; assembly { tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000) } return tempAddress; } function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) { require(_bytes.length >= _start + 1 , "toUint8_outOfBounds"); uint8 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x1), _start)) } return tempUint; } function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) { require(_bytes.length >= _start + 2, "toUint16_outOfBounds"); uint16 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x2), _start)) } return tempUint; } function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) { require(_bytes.length >= _start + 4, "toUint32_outOfBounds"); uint32 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x4), _start)) } return tempUint; } function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) { require(_bytes.length >= _start + 8, "toUint64_outOfBounds"); uint64 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x8), _start)) } return tempUint; } function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) { require(_bytes.length >= _start + 12, "toUint96_outOfBounds"); uint96 tempUint; assembly { tempUint := mload(add(add(_bytes, 0xc), _start)) } return tempUint; } function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) { require(_bytes.length >= _start + 16, "toUint128_outOfBounds"); uint128 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x10), _start)) } return tempUint; } function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) { require(_bytes.length >= _start + 32, "toUint256_outOfBounds"); uint256 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x20), _start)) } return tempUint; } function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) { require(_bytes.length >= _start + 32, "toBytes32_outOfBounds"); bytes32 tempBytes32; assembly { tempBytes32 := mload(add(add(_bytes, 0x20), _start)) } return tempBytes32; } function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let mc := add(_preBytes, 0x20) let end := add(mc, length) for { let cc := add(_postBytes, 0x20) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) } eq(add(lt(mc, end), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } } default { // unsuccess: success := 0 } } return success; } function equal_nonAligned(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let endMinusWord := add(_preBytes, length) let mc := add(_preBytes, 0x20) let cc := add(_postBytes, 0x20) for { // the next line is the loop condition: // while(uint256(mc < endWord) + cb == 2) } eq(add(lt(mc, endMinusWord), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } // Only if still successful // For <1 word tail bytes if gt(success, 0) { // Get the remainder of length/32 // length % 32 = AND(length, 32 - 1) let numTailBytes := and(length, 0x1f) let mcRem := mload(mc) let ccRem := mload(cc) for { let i := 0 // the next line is the loop condition: // while(uint256(i < numTailBytes) + cb == 2) } eq(add(lt(i, numTailBytes), cb), 2) { i := add(i, 1) } { if iszero(eq(byte(i, mcRem), byte(i, ccRem))) { // unsuccess: success := 0 cb := 0 } } } } default { // unsuccess: success := 0 } } return success; } function equalStorage( bytes storage _preBytes, bytes memory _postBytes ) internal view returns (bool) { bool success = true; assembly { // we know _preBytes_offset is 0 let fslot := sload(_preBytes.slot) // Decode the length of the stored array like in concatStorage(). let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) // if lengths don't match the arrays are not equal switch eq(slength, mlength) case 1 { // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage if iszero(iszero(slength)) { switch lt(slength, 32) case 1 { // blank the last byte which is the length fslot := mul(div(fslot, 0x100), 0x100) if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) { // unsuccess: success := 0 } } default { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := keccak256(0x0, 0x20) let mc := add(_postBytes, 0x20) let end := add(mc, mlength) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) for {} eq(add(lt(mc, end), cb), 2) { sc := add(sc, 1) mc := add(mc, 0x20) } { if iszero(eq(sload(sc), mload(mc))) { // unsuccess: success := 0 cb := 0 } } } } } default { // unsuccess: success := 0 } } return success; } }
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Origin","name":"origin","type":"tuple"}],"name":"allowInitializePath","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"lzPayload","type":"bytes"},{"internalType":"uint16","name":"packetType","type":"uint16"},{"internalType":"uint16","name":"dstEid","type":"uint16"}],"name":"calcFee","outputs":[{"internalType":"uint256","name":"lzFee","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"endpoint","outputs":[{"internalType":"contract ILayerZeroEndpointV2","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"_destinationEP","type":"uint32"}],"name":"getOptions","outputs":[{"internalType":"bytes","name":"options","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"__synthrAddressResolver","type":"address"},{"internalType":"uint16","name":"__mainChainId","type":"uint16"},{"internalType":"uint16","name":"__selfLZChainId","type":"uint16"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"srcEid","type":"uint32"},{"internalType":"bytes32","name":"sender","type":"bytes32"},{"internalType":"uint64","name":"nonce","type":"uint64"}],"internalType":"struct Origin","name":"","type":"tuple"},{"internalType":"bytes","name":"","type":"bytes"},{"internalType":"address","name":"_sender","type":"address"}],"name":"isComposeMsgSender","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lzFeePercentage","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"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 Origin","name":"_origin","type":"tuple"},{"internalType":"bytes32","name":"_guid","type":"bytes32"},{"internalType":"bytes","name":"_message","type":"bytes"},{"internalType":"address","name":"_executor","type":"address"},{"internalType":"bytes","name":"_extraData","type":"bytes"}],"name":"lzReceive","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"mainChainId","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"","type":"uint32"},{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"nextNonce","outputs":[{"internalType":"uint64","name":"nonce","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"oAppVersion","outputs":[{"internalType":"uint64","name":"senderVersion","type":"uint64"},{"internalType":"uint64","name":"receiverVersion","type":"uint64"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"eid","type":"uint32"}],"name":"peers","outputs":[{"internalType":"bytes32","name":"peer","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"selfLZChainId","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"synthKey","type":"bytes32"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendBridgeSyToken","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"synthKey","type":"bytes32"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendBurn","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"srcKey","type":"bytes32"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"bytes32","name":"dstKey","type":"bytes32"},{"internalType":"uint256","name":"dstAmount","type":"uint256"},{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"address","name":"dexAddress","type":"address"},{"internalType":"bytes","name":"dexPayload","type":"bytes"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendCrossSwapNativeToNative","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"srcKey","type":"bytes32"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"bytes32","name":"dstKey","type":"bytes32"},{"internalType":"uint256","name":"dstAmount","type":"uint256"},{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendCrossSwapNativeToNativeWithDex","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"srcKey","type":"bytes32"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"bytes32","name":"dstKey","type":"bytes32"},{"internalType":"uint256","name":"dstAmount","type":"uint256"},{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendCrossSwapNativeToSyAsset","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"srcKey","type":"bytes32"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"bytes32","name":"dstKey","type":"bytes32"},{"internalType":"uint256","name":"dstAmount","type":"uint256"},{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"bytes","name":"dexPayload","type":"bytes"},{"internalType":"address","name":"dexAddress","type":"address"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendCrossSwapSyAssetToNative","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"srcKey","type":"bytes32"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"bytes32","name":"dstKey","type":"bytes32"},{"internalType":"uint256","name":"dstAmount","type":"uint256"},{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendCrossSwapSyAssetToNativeWithDex","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"collateralKey","type":"bytes32"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendDepositCollateral","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"srcSynthKey","type":"bytes32"},{"internalType":"bytes32","name":"dstSynthKey","type":"bytes32"},{"internalType":"uint256","name":"srcAmount","type":"uint256"},{"internalType":"uint256","name":"dstAmount","type":"uint256"},{"internalType":"uint256","name":"reclaimed","type":"uint256"},{"internalType":"uint256","name":"refund","type":"uint256"},{"internalType":"uint256","name":"fee","type":"uint256"},{"internalType":"uint16","name":"dstChainId","type":"uint16"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendExchange","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"marginDelta","type":"uint256"},{"internalType":"bytes32","name":"marketKey","type":"bytes32"},{"internalType":"bool","name":"","type":"bool"}],"name":"sendTransferMargin","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_delegate","type":"address"}],"name":"setDelegate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_destinationEP","type":"uint32"},{"internalType":"uint128","name":"_gasLimit","type":"uint128"}],"name":"setGasLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_percentage","type":"uint16"}],"name":"setLZFeePercentage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_eid","type":"uint32"},{"internalType":"bytes32","name":"_peer","type":"bytes32"}],"name":"setPeer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawAsset","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000006edce65403992e310a62460808c4b910d972f10f0000000000000000000000006f808ae3445a711ecaa4da5c8330b051541a4de0
-----Decoded View---------------
Arg [0] : _lzEndpoint (address): 0x6EDCE65403992e310A62460808c4b910D972f10f
Arg [1] : _owner (address): 0x6F808aE3445A711ecAa4DA5c8330B051541A4dE0
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000006edce65403992e310a62460808c4b910d972f10f
Arg [1] : 0000000000000000000000006f808ae3445a711ecaa4da5c8330b051541a4de0
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.