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Send From | 23604545 | 5 days ago | IN | 0.000080857453012 ETH | 0.000000558201 | ||||
Transfer Ownersh... | 14174130 | 223 days ago | IN | 0 ETH | 0.000004940331 | ||||
Set Max Single R... | 14174113 | 223 days ago | IN | 0 ETH | 0.000008450789 | ||||
Set Max Daily Re... | 14174107 | 223 days ago | IN | 0 ETH | 0.000008487082 | ||||
Set Max Single T... | 14174103 | 223 days ago | IN | 0 ETH | 0.000008434035 | ||||
Set Max Daily Li... | 14174098 | 223 days ago | IN | 0 ETH | 0.00000834937 | ||||
Set Min Dst Gas | 14174094 | 223 days ago | IN | 0 ETH | 0.0000079751 | ||||
Set Max Single R... | 14174090 | 223 days ago | IN | 0 ETH | 0.000008288146 | ||||
Set Max Daily Re... | 14174083 | 223 days ago | IN | 0 ETH | 0.000008274523 | ||||
Set Max Single T... | 14174076 | 223 days ago | IN | 0 ETH | 0.000008266505 | ||||
Set Max Daily Li... | 14174070 | 223 days ago | IN | 0 ETH | 0.000008253151 | ||||
Set Min Dst Gas | 14174064 | 223 days ago | IN | 0 ETH | 0.000007908835 | ||||
Set Max Single R... | 14174059 | 223 days ago | IN | 0 ETH | 0.000008224741 | ||||
Set Max Daily Re... | 14174051 | 223 days ago | IN | 0 ETH | 0.000008163104 | ||||
Set Max Single T... | 14174041 | 223 days ago | IN | 0 ETH | 0.000008185246 | ||||
Set Max Daily Li... | 14174038 | 223 days ago | IN | 0 ETH | 0.000008189658 | ||||
Set Min Dst Gas | 14174033 | 223 days ago | IN | 0 ETH | 0.000007886887 | ||||
Set Max Single R... | 14174029 | 223 days ago | IN | 0 ETH | 0.000008207158 | ||||
Set Max Daily Re... | 14174024 | 223 days ago | IN | 0 ETH | 0.00000824017 | ||||
Set Max Single T... | 14174017 | 223 days ago | IN | 0 ETH | 0.000008194758 | ||||
Set Max Daily Li... | 14174011 | 223 days ago | IN | 0 ETH | 0.000008075058 | ||||
Set Min Dst Gas | 14174007 | 223 days ago | IN | 0 ETH | 0.000007753005 |
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Contract Source Code Verified (Exact Match)
Contract Name:
XVSProxyOFTDest
Compiler Version
v0.8.25+commit.b61c2a91
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BSD-3-Clause pragma solidity 0.8.25; import { IXVS } from "./interfaces/IXVS.sol"; import { BaseXVSProxyOFT } from "./BaseXVSProxyOFT.sol"; /** * @title XVSProxyOFTDest * @author Venus * @notice XVSProxyOFTDest contract builds upon the functionality of its parent contract, BaseXVSProxyOFT, * and focuses on managing token transfers to the destination chain. * It provides functions to check eligibility and perform the actual token transfers while maintaining strict access controls and pausing mechanisms. */ contract XVSProxyOFTDest is BaseXVSProxyOFT { /** * @notice Emits when stored message dropped without successful retrying. */ event DropFailedMessage(uint16 srcChainId, bytes indexed srcAddress, uint64 nonce); constructor( address tokenAddress_, uint8 sharedDecimals_, address lzEndpoint_, address oracle_ ) BaseXVSProxyOFT(tokenAddress_, sharedDecimals_, lzEndpoint_, oracle_) {} /** * @notice Clear failed messages from the storage. * @param srcChainId_ Chain id of source * @param srcAddress_ Address of source followed by current bridge address * @param nonce_ Nonce_ of the transaction * @custom:access Only owner * @custom:event Emits DropFailedMessage on clearance of failed message. */ function dropFailedMessage(uint16 srcChainId_, bytes memory srcAddress_, uint64 nonce_) external onlyOwner { failedMessages[srcChainId_][srcAddress_][nonce_] = bytes32(0); emit DropFailedMessage(srcChainId_, srcAddress_, nonce_); } /** * @notice Returns the total circulating supply of the token on the destination chain i.e (total supply). * @return total circulating supply of the token on the destination chain. */ function circulatingSupply() public view override returns (uint256) { return innerToken.totalSupply(); } /** * @notice Debit tokens from the given address * @param from_ Address from which tokens to be debited * @param dstChainId_ Destination chain id * @param amount_ Amount of tokens to be debited * @return Actual amount debited */ function _debitFrom( address from_, uint16 dstChainId_, bytes32, uint256 amount_ ) internal override whenNotPaused returns (uint256) { require(from_ == _msgSender(), "ProxyOFT: owner is not send caller"); _isEligibleToSend(from_, dstChainId_, amount_); IXVS(address(innerToken)).burn(from_, amount_); return amount_; } /** * @notice Credit tokens in the given account * @param srcChainId_ Source chain id * @param toAddress_ Address on which token will be credited * @param amount_ Amount of tokens to be credited * @return Actual amount credited */ function _creditTo( uint16 srcChainId_, address toAddress_, uint256 amount_ ) internal override whenNotPaused returns (uint256) { _isEligibleToReceive(toAddress_, srcChainId_, amount_); IXVS(address(innerToken)).mint(toAddress_, amount_); return amount_; } }
// 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, uint _start, uint _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, uint _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, uint _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, uint _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, uint _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, uint _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, uint _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, uint _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, uint _start) internal pure returns (uint) { require(_bytes.length >= _start + 32, "toUint256_outOfBounds"); uint tempUint; assembly { tempUint := mload(add(add(_bytes, 0x20), _start)) } return tempUint; } function toBytes32(bytes memory _bytes, uint _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 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: MIT OR Apache-2.0 pragma solidity >=0.7.6; library ExcessivelySafeCall { uint constant LOW_28_MASK = 0x00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff; /// @notice Use when you _really_ really _really_ don't trust the called /// contract. This prevents the called contract from causing reversion of /// the caller in as many ways as we can. /// @dev The main difference between this and a solidity low-level call is /// that we limit the number of bytes that the callee can cause to be /// copied to caller memory. This prevents stupid things like malicious /// contracts returning 10,000,000 bytes causing a local OOG when copying /// to memory. /// @param _target The address to call /// @param _gas The amount of gas to forward to the remote contract /// @param _maxCopy The maximum number of bytes of returndata to copy /// to memory. /// @param _calldata The data to send to the remote contract /// @return success and returndata, as `.call()`. Returndata is capped to /// `_maxCopy` bytes. function excessivelySafeCall( address _target, uint _gas, uint16 _maxCopy, bytes memory _calldata ) internal returns (bool, bytes memory) { // set up for assembly call uint _toCopy; bool _success; bytes memory _returnData = new bytes(_maxCopy); // dispatch message to recipient // by assembly calling "handle" function // we call via assembly to avoid memcopying a very large returndata // returned by a malicious contract assembly { _success := call( _gas, // gas _target, // recipient 0, // ether value add(_calldata, 0x20), // inloc mload(_calldata), // inlen 0, // outloc 0 // outlen ) // limit our copy to 256 bytes _toCopy := returndatasize() if gt(_toCopy, _maxCopy) { _toCopy := _maxCopy } // Store the length of the copied bytes mstore(_returnData, _toCopy) // copy the bytes from returndata[0:_toCopy] returndatacopy(add(_returnData, 0x20), 0, _toCopy) } return (_success, _returnData); } /// @notice Use when you _really_ really _really_ don't trust the called /// contract. This prevents the called contract from causing reversion of /// the caller in as many ways as we can. /// @dev The main difference between this and a solidity low-level call is /// that we limit the number of bytes that the callee can cause to be /// copied to caller memory. This prevents stupid things like malicious /// contracts returning 10,000,000 bytes causing a local OOG when copying /// to memory. /// @param _target The address to call /// @param _gas The amount of gas to forward to the remote contract /// @param _maxCopy The maximum number of bytes of returndata to copy /// to memory. /// @param _calldata The data to send to the remote contract /// @return success and returndata, as `.call()`. Returndata is capped to /// `_maxCopy` bytes. function excessivelySafeStaticCall( address _target, uint _gas, uint16 _maxCopy, bytes memory _calldata ) internal view returns (bool, bytes memory) { // set up for assembly call uint _toCopy; bool _success; bytes memory _returnData = new bytes(_maxCopy); // dispatch message to recipient // by assembly calling "handle" function // we call via assembly to avoid memcopying a very large returndata // returned by a malicious contract assembly { _success := staticcall( _gas, // gas _target, // recipient add(_calldata, 0x20), // inloc mload(_calldata), // inlen 0, // outloc 0 // outlen ) // limit our copy to 256 bytes _toCopy := returndatasize() if gt(_toCopy, _maxCopy) { _toCopy := _maxCopy } // Store the length of the copied bytes mstore(_returnData, _toCopy) // copy the bytes from returndata[0:_toCopy] returndatacopy(add(_returnData, 0x20), 0, _toCopy) } return (_success, _returnData); } /** * @notice Swaps function selectors in encoded contract calls * @dev Allows reuse of encoded calldata for functions with identical * argument types but different names. It simply swaps out the first 4 bytes * for the new selector. This function modifies memory in place, and should * only be used with caution. * @param _newSelector The new 4-byte selector * @param _buf The encoded contract args */ function swapSelector(bytes4 _newSelector, bytes memory _buf) internal pure { require(_buf.length >= 4); uint _mask = LOW_28_MASK; assembly { // load the first word of let _word := mload(add(_buf, 0x20)) // mask out the top 4 bytes // /x _word := and(_word, _mask) _word := or(_newSelector, _word) mstore(add(_buf, 0x20), _word) } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; import "./ILayerZeroUserApplicationConfig.sol"; interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig { // @notice send a LayerZero message to the specified address at a LayerZero endpoint. // @param _dstChainId - the destination chain identifier // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains // @param _payload - a custom bytes payload to send to the destination contract // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination function send( uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams ) external payable; // @notice used by the messaging library to publish verified payload // @param _srcChainId - the source chain identifier // @param _srcAddress - the source contract (as bytes) at the source chain // @param _dstAddress - the address on destination chain // @param _nonce - the unbound message ordering nonce // @param _gasLimit - the gas limit for external contract execution // @param _payload - verified payload to send to the destination contract function receivePayload( uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload ) external; // @notice get the inboundNonce of a lzApp from a source chain which could be EVM or non-EVM chain // @param _srcChainId - the source chain identifier // @param _srcAddress - the source chain contract address function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64); // @notice get the outboundNonce from this source chain which, consequently, is always an EVM // @param _srcAddress - the source chain contract address function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64); // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery // @param _dstChainId - the destination chain identifier // @param _userApplication - the user app address on this EVM chain // @param _payload - the custom message to send over LayerZero // @param _payInZRO - if false, user app pays the protocol fee in native token // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain function estimateFees( uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam ) external view returns (uint nativeFee, uint zroFee); // @notice get this Endpoint's immutable source identifier function getChainId() external view returns (uint16); // @notice the interface to retry failed message on this Endpoint destination // @param _srcChainId - the source chain identifier // @param _srcAddress - the source chain contract address // @param _payload - the payload to be retried function retryPayload( uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload ) external; // @notice query if any STORED payload (message blocking) at the endpoint. // @param _srcChainId - the source chain identifier // @param _srcAddress - the source chain contract address function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool); // @notice query if the _libraryAddress is valid for sending msgs. // @param _userApplication - the user app address on this EVM chain function getSendLibraryAddress(address _userApplication) external view returns (address); // @notice query if the _libraryAddress is valid for receiving msgs. // @param _userApplication - the user app address on this EVM chain function getReceiveLibraryAddress(address _userApplication) external view returns (address); // @notice query if the non-reentrancy guard for send() is on // @return true if the guard is on. false otherwise function isSendingPayload() external view returns (bool); // @notice query if the non-reentrancy guard for receive() is on // @return true if the guard is on. false otherwise function isReceivingPayload() external view returns (bool); // @notice get the configuration of the LayerZero messaging library of the specified version // @param _version - messaging library version // @param _chainId - the chainId for the pending config change // @param _userApplication - the contract address of the user application // @param _configType - type of configuration. every messaging library has its own convention. function getConfig( uint16 _version, uint16 _chainId, address _userApplication, uint _configType ) external view returns (bytes memory); // @notice get the send() LayerZero messaging library version // @param _userApplication - the contract address of the user application function getSendVersion(address _userApplication) external view returns (uint16); // @notice get the lzReceive() LayerZero messaging library version // @param _userApplication - the contract address of the user application function getReceiveVersion(address _userApplication) external view returns (uint16); }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; interface ILayerZeroReceiver { // @notice LayerZero endpoint will invoke this function to deliver the message on the destination // @param _srcChainId - the source endpoint identifier // @param _srcAddress - the source sending contract address from the source chain // @param _nonce - the ordered message nonce // @param _payload - the signed payload is the UA bytes has encoded to be sent function lzReceive( uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload ) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; interface ILayerZeroUserApplicationConfig { // @notice set the configuration of the LayerZero messaging library of the specified version // @param _version - messaging library version // @param _chainId - the chainId for the pending config change // @param _configType - type of configuration. every messaging library has its own convention. // @param _config - configuration in the bytes. can encode arbitrary content. function setConfig( uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config ) external; // @notice set the send() LayerZero messaging library version to _version // @param _version - new messaging library version function setSendVersion(uint16 _version) external; // @notice set the lzReceive() LayerZero messaging library version to _version // @param _version - new messaging library version function setReceiveVersion(uint16 _version) external; // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload // @param _srcChainId - the chainId of the source chain // @param _srcAddress - the contract address of the source contract at the source chain function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "./interfaces/ILayerZeroReceiver.sol"; import "./interfaces/ILayerZeroUserApplicationConfig.sol"; import "./interfaces/ILayerZeroEndpoint.sol"; import "../libraries/BytesLib.sol"; /* * a generic LzReceiver implementation */ abstract contract LzApp is Ownable, ILayerZeroReceiver, ILayerZeroUserApplicationConfig { using BytesLib for bytes; // ua can not send payload larger than this by default, but it can be changed by the ua owner uint public constant DEFAULT_PAYLOAD_SIZE_LIMIT = 10000; ILayerZeroEndpoint public immutable lzEndpoint; mapping(uint16 => bytes) public trustedRemoteLookup; mapping(uint16 => mapping(uint16 => uint)) public minDstGasLookup; mapping(uint16 => uint) public payloadSizeLimitLookup; address public precrime; event SetPrecrime(address precrime); event SetTrustedRemote(uint16 _remoteChainId, bytes _path); event SetTrustedRemoteAddress(uint16 _remoteChainId, bytes _remoteAddress); event SetMinDstGas(uint16 _dstChainId, uint16 _type, uint _minDstGas); constructor(address _endpoint) { lzEndpoint = ILayerZeroEndpoint(_endpoint); } function lzReceive( uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload ) public virtual override { // lzReceive must be called by the endpoint for security require(_msgSender() == address(lzEndpoint), "LzApp: invalid endpoint caller"); bytes memory trustedRemote = trustedRemoteLookup[_srcChainId]; // if will still block the message pathway from (srcChainId, srcAddress). should not receive message from untrusted remote. require( _srcAddress.length == trustedRemote.length && trustedRemote.length > 0 && keccak256(_srcAddress) == keccak256(trustedRemote), "LzApp: invalid source sending contract" ); _blockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload); } // abstract function - the default behaviour of LayerZero is blocking. See: NonblockingLzApp if you dont need to enforce ordered messaging function _blockingLzReceive( uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload ) internal virtual; function _lzSend( uint16 _dstChainId, bytes memory _payload, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParams, uint _nativeFee ) internal virtual { bytes memory trustedRemote = trustedRemoteLookup[_dstChainId]; require(trustedRemote.length != 0, "LzApp: destination chain is not a trusted source"); _checkPayloadSize(_dstChainId, _payload.length); lzEndpoint.send{value: _nativeFee}(_dstChainId, trustedRemote, _payload, _refundAddress, _zroPaymentAddress, _adapterParams); } function _checkGasLimit( uint16 _dstChainId, uint16 _type, bytes memory _adapterParams, uint _extraGas ) internal view virtual { uint providedGasLimit = _getGasLimit(_adapterParams); uint minGasLimit = minDstGasLookup[_dstChainId][_type]; require(minGasLimit > 0, "LzApp: minGasLimit not set"); require(providedGasLimit >= minGasLimit + _extraGas, "LzApp: gas limit is too low"); } function _getGasLimit(bytes memory _adapterParams) internal pure virtual returns (uint gasLimit) { require(_adapterParams.length >= 34, "LzApp: invalid adapterParams"); assembly { gasLimit := mload(add(_adapterParams, 34)) } } function _checkPayloadSize(uint16 _dstChainId, uint _payloadSize) internal view virtual { uint payloadSizeLimit = payloadSizeLimitLookup[_dstChainId]; if (payloadSizeLimit == 0) { // use default if not set payloadSizeLimit = DEFAULT_PAYLOAD_SIZE_LIMIT; } require(_payloadSize <= payloadSizeLimit, "LzApp: payload size is too large"); } //---------------------------UserApplication config---------------------------------------- function getConfig( uint16 _version, uint16 _chainId, address, uint _configType ) external view returns (bytes memory) { return lzEndpoint.getConfig(_version, _chainId, address(this), _configType); } // generic config for LayerZero user Application function setConfig( uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config ) external override onlyOwner { lzEndpoint.setConfig(_version, _chainId, _configType, _config); } function setSendVersion(uint16 _version) external override onlyOwner { lzEndpoint.setSendVersion(_version); } function setReceiveVersion(uint16 _version) external override onlyOwner { lzEndpoint.setReceiveVersion(_version); } function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external override onlyOwner { lzEndpoint.forceResumeReceive(_srcChainId, _srcAddress); } // _path = abi.encodePacked(remoteAddress, localAddress) // this function set the trusted path for the cross-chain communication function setTrustedRemote(uint16 _remoteChainId, bytes calldata _path) external onlyOwner { trustedRemoteLookup[_remoteChainId] = _path; emit SetTrustedRemote(_remoteChainId, _path); } function setTrustedRemoteAddress(uint16 _remoteChainId, bytes calldata _remoteAddress) external onlyOwner { trustedRemoteLookup[_remoteChainId] = abi.encodePacked(_remoteAddress, address(this)); emit SetTrustedRemoteAddress(_remoteChainId, _remoteAddress); } function getTrustedRemoteAddress(uint16 _remoteChainId) external view returns (bytes memory) { bytes memory path = trustedRemoteLookup[_remoteChainId]; require(path.length != 0, "LzApp: no trusted path record"); return path.slice(0, path.length - 20); // the last 20 bytes should be address(this) } function setPrecrime(address _precrime) external onlyOwner { precrime = _precrime; emit SetPrecrime(_precrime); } function setMinDstGas( uint16 _dstChainId, uint16 _packetType, uint _minGas ) external onlyOwner { minDstGasLookup[_dstChainId][_packetType] = _minGas; emit SetMinDstGas(_dstChainId, _packetType, _minGas); } // if the size is 0, it means default size limit function setPayloadSizeLimit(uint16 _dstChainId, uint _size) external onlyOwner { payloadSizeLimitLookup[_dstChainId] = _size; } //--------------------------- VIEW FUNCTION ---------------------------------------- function isTrustedRemote(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool) { bytes memory trustedSource = trustedRemoteLookup[_srcChainId]; return keccak256(trustedSource) == keccak256(_srcAddress); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./LzApp.sol"; import "../libraries/ExcessivelySafeCall.sol"; /* * the default LayerZero messaging behaviour is blocking, i.e. any failed message will block the channel * this abstract class try-catch all fail messages and store locally for future retry. hence, non-blocking * NOTE: if the srcAddress is not configured properly, it will still block the message pathway from (srcChainId, srcAddress) */ abstract contract NonblockingLzApp is LzApp { using ExcessivelySafeCall for address; constructor(address _endpoint) LzApp(_endpoint) {} mapping(uint16 => mapping(bytes => mapping(uint64 => bytes32))) public failedMessages; event MessageFailed(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes _payload, bytes _reason); event RetryMessageSuccess(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes32 _payloadHash); // overriding the virtual function in LzReceiver function _blockingLzReceive( uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload ) internal virtual override { (bool success, bytes memory reason) = address(this).excessivelySafeCall( gasleft(), 150, abi.encodeWithSelector(this.nonblockingLzReceive.selector, _srcChainId, _srcAddress, _nonce, _payload) ); // try-catch all errors/exceptions if (!success) { _storeFailedMessage(_srcChainId, _srcAddress, _nonce, _payload, reason); } } function _storeFailedMessage( uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload, bytes memory _reason ) internal virtual { failedMessages[_srcChainId][_srcAddress][_nonce] = keccak256(_payload); emit MessageFailed(_srcChainId, _srcAddress, _nonce, _payload, _reason); } function nonblockingLzReceive( uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload ) public virtual { // only internal transaction require(_msgSender() == address(this), "NonblockingLzApp: caller must be LzApp"); _nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload); } //@notice override this function function _nonblockingLzReceive( uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload ) internal virtual; function retryMessage( uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload ) public payable virtual { // assert there is message to retry bytes32 payloadHash = failedMessages[_srcChainId][_srcAddress][_nonce]; require(payloadHash != bytes32(0), "NonblockingLzApp: no stored message"); require(keccak256(_payload) == payloadHash, "NonblockingLzApp: invalid payload"); // clear the stored message failedMessages[_srcChainId][_srcAddress][_nonce] = bytes32(0); // execute the message. revert if it fails again _nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload); emit RetryMessageSuccess(_srcChainId, _srcAddress, _nonce, payloadHash); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./OFTCoreV2.sol"; import "./interfaces/IOFTV2.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; abstract contract BaseOFTV2 is OFTCoreV2, ERC165, IOFTV2 { constructor(uint8 _sharedDecimals, address _lzEndpoint) OFTCoreV2(_sharedDecimals, _lzEndpoint) {} /************************************************************************ * public functions ************************************************************************/ function sendFrom( address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, LzCallParams calldata _callParams ) public payable virtual override { _send(_from, _dstChainId, _toAddress, _amount, _callParams.refundAddress, _callParams.zroPaymentAddress, _callParams.adapterParams); } function sendAndCall( address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes calldata _payload, uint64 _dstGasForCall, LzCallParams calldata _callParams ) public payable virtual override { _sendAndCall( _from, _dstChainId, _toAddress, _amount, _payload, _dstGasForCall, _callParams.refundAddress, _callParams.zroPaymentAddress, _callParams.adapterParams ); } /************************************************************************ * public view functions ************************************************************************/ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IOFTV2).interfaceId || super.supportsInterface(interfaceId); } function estimateSendFee( uint16 _dstChainId, bytes32 _toAddress, uint _amount, bool _useZro, bytes calldata _adapterParams ) public view virtual override returns (uint nativeFee, uint zroFee) { return _estimateSendFee(_dstChainId, _toAddress, _amount, _useZro, _adapterParams); } function estimateSendAndCallFee( uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes calldata _payload, uint64 _dstGasForCall, bool _useZro, bytes calldata _adapterParams ) public view virtual override returns (uint nativeFee, uint zroFee) { return _estimateSendAndCallFee(_dstChainId, _toAddress, _amount, _payload, _dstGasForCall, _useZro, _adapterParams); } function circulatingSupply() public view virtual override returns (uint); function token() public view virtual override returns (address); }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; import "@openzeppelin/contracts/utils/introspection/IERC165.sol"; /** * @dev Interface of the IOFT core standard */ interface ICommonOFT is IERC165 { struct LzCallParams { address payable refundAddress; address zroPaymentAddress; bytes adapterParams; } /** * @dev estimate send token `_tokenId` to (`_dstChainId`, `_toAddress`) * _dstChainId - L0 defined chain id to send tokens too * _toAddress - dynamic bytes array which contains the address to whom you are sending tokens to on the dstChain * _amount - amount of the tokens to transfer * _useZro - indicates to use zro to pay L0 fees * _adapterParam - flexible bytes array to indicate messaging adapter services in L0 */ function estimateSendFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bool _useZro, bytes calldata _adapterParams) external view returns (uint nativeFee, uint zroFee); function estimateSendAndCallFee(uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes calldata _payload, uint64 _dstGasForCall, bool _useZro, bytes calldata _adapterParams) external view returns (uint nativeFee, uint zroFee); /** * @dev returns the circulating amount of tokens on current chain */ function circulatingSupply() external view returns (uint); /** * @dev returns the address of the ERC20 token */ function token() external view returns (address); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.5.0; interface IOFTReceiverV2 { /** * @dev Called by the OFT contract when tokens are received from source chain. * @param _srcChainId The chain id of the source chain. * @param _srcAddress The address of the OFT token contract on the source chain. * @param _nonce The nonce of the transaction on the source chain. * @param _from The address of the account who calls the sendAndCall() on the source chain. * @param _amount The amount of tokens to transfer. * @param _payload Additional data with no specified format. */ function onOFTReceived(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes32 _from, uint _amount, bytes calldata _payload) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.5.0; import "./ICommonOFT.sol"; /** * @dev Interface of the IOFT core standard */ interface IOFTV2 is ICommonOFT { /** * @dev send `_amount` amount of token to (`_dstChainId`, `_toAddress`) from `_from` * `_from` the owner of token * `_dstChainId` the destination chain identifier * `_toAddress` can be any size depending on the `dstChainId`. * `_amount` the quantity of tokens in wei * `_refundAddress` the address LayerZero refunds if too much message fee is sent * `_zroPaymentAddress` set to address(0x0) if not paying in ZRO (LayerZero Token) * `_adapterParams` is a flexible bytes array to indicate messaging adapter services */ function sendFrom(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, LzCallParams calldata _callParams) external payable; function sendAndCall(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes calldata _payload, uint64 _dstGasForCall, LzCallParams calldata _callParams) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../../lzApp/NonblockingLzApp.sol"; import "../../../libraries/ExcessivelySafeCall.sol"; import "./interfaces/ICommonOFT.sol"; import "./interfaces/IOFTReceiverV2.sol"; abstract contract OFTCoreV2 is NonblockingLzApp { using BytesLib for bytes; using ExcessivelySafeCall for address; uint public constant NO_EXTRA_GAS = 0; // packet type uint8 public constant PT_SEND = 0; uint8 public constant PT_SEND_AND_CALL = 1; uint8 public immutable sharedDecimals; mapping(uint16 => mapping(bytes => mapping(uint64 => bool))) public creditedPackets; /** * @dev Emitted when `_amount` tokens are moved from the `_sender` to (`_dstChainId`, `_toAddress`) * `_nonce` is the outbound nonce */ event SendToChain(uint16 indexed _dstChainId, address indexed _from, bytes32 indexed _toAddress, uint _amount); /** * @dev Emitted when `_amount` tokens are received from `_srcChainId` into the `_toAddress` on the local chain. * `_nonce` is the inbound nonce. */ event ReceiveFromChain(uint16 indexed _srcChainId, address indexed _to, uint _amount); event CallOFTReceivedSuccess(uint16 indexed _srcChainId, bytes _srcAddress, uint64 _nonce, bytes32 _hash); event NonContractAddress(address _address); // _sharedDecimals should be the minimum decimals on all chains constructor(uint8 _sharedDecimals, address _lzEndpoint) NonblockingLzApp(_lzEndpoint) { sharedDecimals = _sharedDecimals; } /************************************************************************ * public functions ************************************************************************/ function callOnOFTReceived( uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes32 _from, address _to, uint _amount, bytes calldata _payload, uint _gasForCall ) public virtual { require(_msgSender() == address(this), "OFTCore: caller must be OFTCore"); // send _amount = _transferFrom(address(this), _to, _amount); emit ReceiveFromChain(_srcChainId, _to, _amount); // call IOFTReceiverV2(_to).onOFTReceived{gas: _gasForCall}(_srcChainId, _srcAddress, _nonce, _from, _amount, _payload); } /************************************************************************ * internal functions ************************************************************************/ function _estimateSendFee( uint16 _dstChainId, bytes32 _toAddress, uint _amount, bool _useZro, bytes memory _adapterParams ) internal view virtual returns (uint nativeFee, uint zroFee) { // mock the payload for sendFrom() bytes memory payload = _encodeSendPayload(_toAddress, _ld2sd(_amount)); return lzEndpoint.estimateFees(_dstChainId, address(this), payload, _useZro, _adapterParams); } function _estimateSendAndCallFee( uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes memory _payload, uint64 _dstGasForCall, bool _useZro, bytes memory _adapterParams ) internal view virtual returns (uint nativeFee, uint zroFee) { // mock the payload for sendAndCall() bytes memory payload = _encodeSendAndCallPayload(msg.sender, _toAddress, _ld2sd(_amount), _payload, _dstGasForCall); return lzEndpoint.estimateFees(_dstChainId, address(this), payload, _useZro, _adapterParams); } function _nonblockingLzReceive( uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload ) internal virtual override { uint8 packetType = _payload.toUint8(0); if (packetType == PT_SEND) { _sendAck(_srcChainId, _srcAddress, _nonce, _payload); } else if (packetType == PT_SEND_AND_CALL) { _sendAndCallAck(_srcChainId, _srcAddress, _nonce, _payload); } else { revert("OFTCore: unknown packet type"); } } function _send( address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParams ) internal virtual returns (uint amount) { _checkGasLimit(_dstChainId, PT_SEND, _adapterParams, NO_EXTRA_GAS); (amount, ) = _removeDust(_amount); amount = _debitFrom(_from, _dstChainId, _toAddress, amount); // amount returned should not have dust require(amount > 0, "OFTCore: amount too small"); bytes memory lzPayload = _encodeSendPayload(_toAddress, _ld2sd(amount)); _lzSend(_dstChainId, lzPayload, _refundAddress, _zroPaymentAddress, _adapterParams, msg.value); emit SendToChain(_dstChainId, _from, _toAddress, amount); } function _sendAck( uint16 _srcChainId, bytes memory, uint64, bytes memory _payload ) internal virtual { (address to, uint64 amountSD) = _decodeSendPayload(_payload); if (to == address(0)) { to = address(0xdead); } uint amount = _sd2ld(amountSD); amount = _creditTo(_srcChainId, to, amount); emit ReceiveFromChain(_srcChainId, to, amount); } function _sendAndCall( address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, bytes memory _payload, uint64 _dstGasForCall, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParams ) internal virtual returns (uint amount) { _checkGasLimit(_dstChainId, PT_SEND_AND_CALL, _adapterParams, _dstGasForCall); (amount, ) = _removeDust(_amount); amount = _debitFrom(_from, _dstChainId, _toAddress, amount); require(amount > 0, "OFTCore: amount too small"); // encode the msg.sender into the payload instead of _from bytes memory lzPayload = _encodeSendAndCallPayload(msg.sender, _toAddress, _ld2sd(amount), _payload, _dstGasForCall); _lzSend(_dstChainId, lzPayload, _refundAddress, _zroPaymentAddress, _adapterParams, msg.value); emit SendToChain(_dstChainId, _from, _toAddress, amount); } function _sendAndCallAck( uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload ) internal virtual { (bytes32 from, address to, uint64 amountSD, bytes memory payloadForCall, uint64 gasForCall) = _decodeSendAndCallPayload(_payload); bool credited = creditedPackets[_srcChainId][_srcAddress][_nonce]; uint amount = _sd2ld(amountSD); // credit to this contract first, and then transfer to receiver only if callOnOFTReceived() succeeds if (!credited) { amount = _creditTo(_srcChainId, address(this), amount); creditedPackets[_srcChainId][_srcAddress][_nonce] = true; } if (!_isContract(to)) { emit NonContractAddress(to); return; } // workaround for stack too deep uint16 srcChainId = _srcChainId; bytes memory srcAddress = _srcAddress; uint64 nonce = _nonce; bytes memory payload = _payload; bytes32 from_ = from; address to_ = to; uint amount_ = amount; bytes memory payloadForCall_ = payloadForCall; // no gas limit for the call if retry uint gas = credited ? gasleft() : gasForCall; (bool success, bytes memory reason) = address(this).excessivelySafeCall( gasleft(), 150, abi.encodeWithSelector(this.callOnOFTReceived.selector, srcChainId, srcAddress, nonce, from_, to_, amount_, payloadForCall_, gas) ); if (success) { bytes32 hash = keccak256(payload); emit CallOFTReceivedSuccess(srcChainId, srcAddress, nonce, hash); } else { // store the failed message into the nonblockingLzApp _storeFailedMessage(srcChainId, srcAddress, nonce, payload, reason); } } function _isContract(address _account) internal view returns (bool) { return _account.code.length > 0; } function _ld2sd(uint _amount) internal view virtual returns (uint64) { uint amountSD = _amount / _ld2sdRate(); require(amountSD <= type(uint64).max, "OFTCore: amountSD overflow"); return uint64(amountSD); } function _sd2ld(uint64 _amountSD) internal view virtual returns (uint) { return _amountSD * _ld2sdRate(); } function _removeDust(uint _amount) internal view virtual returns (uint amountAfter, uint dust) { dust = _amount % _ld2sdRate(); amountAfter = _amount - dust; } function _encodeSendPayload(bytes32 _toAddress, uint64 _amountSD) internal view virtual returns (bytes memory) { return abi.encodePacked(PT_SEND, _toAddress, _amountSD); } function _decodeSendPayload(bytes memory _payload) internal view virtual returns (address to, uint64 amountSD) { require(_payload.toUint8(0) == PT_SEND && _payload.length == 41, "OFTCore: invalid payload"); to = _payload.toAddress(13); // drop the first 12 bytes of bytes32 amountSD = _payload.toUint64(33); } function _encodeSendAndCallPayload( address _from, bytes32 _toAddress, uint64 _amountSD, bytes memory _payload, uint64 _dstGasForCall ) internal view virtual returns (bytes memory) { return abi.encodePacked(PT_SEND_AND_CALL, _toAddress, _amountSD, _addressToBytes32(_from), _dstGasForCall, _payload); } function _decodeSendAndCallPayload(bytes memory _payload) internal view virtual returns ( bytes32 from, address to, uint64 amountSD, bytes memory payload, uint64 dstGasForCall ) { require(_payload.toUint8(0) == PT_SEND_AND_CALL, "OFTCore: invalid payload"); to = _payload.toAddress(13); // drop the first 12 bytes of bytes32 amountSD = _payload.toUint64(33); from = _payload.toBytes32(41); dstGasForCall = _payload.toUint64(73); payload = _payload.slice(81, _payload.length - 81); } function _addressToBytes32(address _address) internal pure virtual returns (bytes32) { return bytes32(uint(uint160(_address))); } function _debitFrom( address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount ) internal virtual returns (uint); function _creditTo( uint16 _srcChainId, address _toAddress, uint _amount ) internal virtual returns (uint); function _transferFrom( address _from, address _to, uint _amount ) internal virtual returns (uint); function _ld2sdRate() internal view virtual returns (uint); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { require(paused(), "Pausable: not paused"); } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/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 v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.25; interface OracleInterface { function getPrice(address asset) external view returns (uint256); } interface ResilientOracleInterface is OracleInterface { function updatePrice(address vToken) external; function updateAssetPrice(address asset) external; function getUnderlyingPrice(address vToken) external view returns (uint256); } interface TwapInterface is OracleInterface { function updateTwap(address asset) external returns (uint256); } interface BoundValidatorInterface { function validatePriceWithAnchorPrice( address asset, uint256 reporterPrice, uint256 anchorPrice ) external view returns (bool); }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.25; /// @dev Base unit for computations, usually used in scaling (multiplications, divisions) uint256 constant EXP_SCALE = 1e18; /// @dev A unit (literal one) in EXP_SCALE, usually used in additions/subtractions uint256 constant MANTISSA_ONE = EXP_SCALE; /// @dev The approximate number of seconds per year uint256 constant SECONDS_PER_YEAR = 31_536_000;
// SPDX-License-Identifier: BSD-3-Clause pragma solidity 0.8.25; import { EXP_SCALE as EXP_SCALE_, MANTISSA_ONE as MANTISSA_ONE_ } from "./constants.sol"; /** * @title Exponential module for storing fixed-precision decimals * @author Compound * @notice Exp is a struct which stores decimals with a fixed precision of 18 decimal places. * Thus, if we wanted to store the 5.1, mantissa would store 5.1e18. That is: * `Exp({mantissa: 5100000000000000000})`. */ contract ExponentialNoError { struct Exp { uint256 mantissa; } struct Double { uint256 mantissa; } uint256 internal constant EXP_SCALE = EXP_SCALE_; uint256 internal constant DOUBLE_SCALE = 1e36; uint256 internal constant HALF_EXP_SCALE = EXP_SCALE / 2; uint256 internal constant MANTISSA_ONE = MANTISSA_ONE_; /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * EXP_SCALE}) = 15 */ function truncate(Exp memory exp) internal pure returns (uint256) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / EXP_SCALE; } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ // solhint-disable-next-line func-name-mixedcase function mul_ScalarTruncate(Exp memory a, uint256 scalar) internal pure returns (uint256) { Exp memory product = mul_(a, scalar); return truncate(product); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ // solhint-disable-next-line func-name-mixedcase function mul_ScalarTruncateAddUInt(Exp memory a, uint256 scalar, uint256 addend) internal pure returns (uint256) { Exp memory product = mul_(a, scalar); return add_(truncate(product), addend); } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) internal pure returns (bool) { return left.mantissa < right.mantissa; } function safe224(uint256 n, string memory errorMessage) internal pure returns (uint224) { require(n <= type(uint224).max, errorMessage); return uint224(n); } function safe32(uint256 n, string memory errorMessage) internal pure returns (uint32) { require(n <= type(uint32).max, errorMessage); return uint32(n); } function add_(Exp memory a, Exp memory b) internal pure returns (Exp memory) { return Exp({ mantissa: add_(a.mantissa, b.mantissa) }); } function add_(Double memory a, Double memory b) internal pure returns (Double memory) { return Double({ mantissa: add_(a.mantissa, b.mantissa) }); } function add_(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } function sub_(Exp memory a, Exp memory b) internal pure returns (Exp memory) { return Exp({ mantissa: sub_(a.mantissa, b.mantissa) }); } function sub_(Double memory a, Double memory b) internal pure returns (Double memory) { return Double({ mantissa: sub_(a.mantissa, b.mantissa) }); } function sub_(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } function mul_(Exp memory a, Exp memory b) internal pure returns (Exp memory) { return Exp({ mantissa: mul_(a.mantissa, b.mantissa) / EXP_SCALE }); } function mul_(Exp memory a, uint256 b) internal pure returns (Exp memory) { return Exp({ mantissa: mul_(a.mantissa, b) }); } function mul_(uint256 a, Exp memory b) internal pure returns (uint256) { return mul_(a, b.mantissa) / EXP_SCALE; } function mul_(Double memory a, Double memory b) internal pure returns (Double memory) { return Double({ mantissa: mul_(a.mantissa, b.mantissa) / DOUBLE_SCALE }); } function mul_(Double memory a, uint256 b) internal pure returns (Double memory) { return Double({ mantissa: mul_(a.mantissa, b) }); } function mul_(uint256 a, Double memory b) internal pure returns (uint256) { return mul_(a, b.mantissa) / DOUBLE_SCALE; } function mul_(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } function div_(Exp memory a, Exp memory b) internal pure returns (Exp memory) { return Exp({ mantissa: div_(mul_(a.mantissa, EXP_SCALE), b.mantissa) }); } function div_(Exp memory a, uint256 b) internal pure returns (Exp memory) { return Exp({ mantissa: div_(a.mantissa, b) }); } function div_(uint256 a, Exp memory b) internal pure returns (uint256) { return div_(mul_(a, EXP_SCALE), b.mantissa); } function div_(Double memory a, Double memory b) internal pure returns (Double memory) { return Double({ mantissa: div_(mul_(a.mantissa, DOUBLE_SCALE), b.mantissa) }); } function div_(Double memory a, uint256 b) internal pure returns (Double memory) { return Double({ mantissa: div_(a.mantissa, b) }); } function div_(uint256 a, Double memory b) internal pure returns (uint256) { return div_(mul_(a, DOUBLE_SCALE), b.mantissa); } function div_(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } function fraction(uint256 a, uint256 b) internal pure returns (Double memory) { return Double({ mantissa: div_(mul_(a, DOUBLE_SCALE), b) }); } }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity 0.8.25; /// @notice Thrown if the supplied address is a zero address where it is not allowed error ZeroAddressNotAllowed(); /// @notice Thrown if the supplied value is 0 where it is not allowed error ZeroValueNotAllowed(); /// @notice Checks if the provided address is nonzero, reverts otherwise /// @param address_ Address to check /// @custom:error ZeroAddressNotAllowed is thrown if the provided address is a zero address function ensureNonzeroAddress(address address_) pure { if (address_ == address(0)) { revert ZeroAddressNotAllowed(); } } /// @notice Checks if the provided value is nonzero, reverts otherwise /// @param value_ Value to check /// @custom:error ZeroValueNotAllowed is thrown if the provided value is 0 function ensureNonzeroValue(uint256 value_) pure { if (value_ == 0) { revert ZeroValueNotAllowed(); } }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity 0.8.25; import { SafeERC20, IERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { ResilientOracleInterface } from "@venusprotocol/oracle/contracts/interfaces/OracleInterface.sol"; import { Pausable } from "@openzeppelin/contracts/security/Pausable.sol"; import { BaseOFTV2 } from "@layerzerolabs/solidity-examples/contracts/token/oft/v2/BaseOFTV2.sol"; import { ensureNonzeroAddress } from "@venusprotocol/solidity-utilities/contracts/validators.sol"; import { ExponentialNoError } from "@venusprotocol/solidity-utilities/contracts/ExponentialNoError.sol"; /** * @title BaseXVSProxyOFT * @author Venus * @notice The BaseXVSProxyOFT contract is tailored for facilitating cross-chain transactions with an ERC20 token. * It manages transaction limits of a single and daily transactions. * This contract inherits key functionalities from other contracts, including pausing capabilities and error handling. * It holds state variables for the inner token and maps for tracking transaction limits and statistics across various chains and addresses. * The contract allows the owner to configure limits, set whitelists, and control pausing. * Internal functions conduct eligibility check of transactions, making the contract a fundamental component for cross-chain token management. */ abstract contract BaseXVSProxyOFT is Pausable, ExponentialNoError, BaseOFTV2 { using SafeERC20 for IERC20; IERC20 internal immutable innerToken; uint256 internal immutable ld2sdRate; bool public sendAndCallEnabled; /** * @notice The address of ResilientOracle contract wrapped in its interface. */ ResilientOracleInterface public oracle; /** * @notice Maximum limit for a single transaction in USD(scaled with 18 decimals) from local chain. */ mapping(uint16 => uint256) public chainIdToMaxSingleTransactionLimit; /** * @notice Maximum daily limit for transactions in USD(scaled with 18 decimals) from local chain. */ mapping(uint16 => uint256) public chainIdToMaxDailyLimit; /** * @notice Total sent amount in USD(scaled with 18 decimals) within the last 24-hour window from local chain. */ mapping(uint16 => uint256) public chainIdToLast24HourTransferred; /** * @notice Timestamp when the last 24-hour window started from local chain. */ mapping(uint16 => uint256) public chainIdToLast24HourWindowStart; /** * @notice Maximum limit for a single receive transaction in USD(scaled with 18 decimals) from remote chain. */ mapping(uint16 => uint256) public chainIdToMaxSingleReceiveTransactionLimit; /** * @notice Maximum daily limit for receiving transactions in USD(scaled with 18 decimals) from remote chain. */ mapping(uint16 => uint256) public chainIdToMaxDailyReceiveLimit; /** * @notice Total received amount in USD(scaled with 18 decimals) within the last 24-hour window from remote chain. */ mapping(uint16 => uint256) public chainIdToLast24HourReceived; /** * @notice Timestamp when the last 24-hour window started from remote chain. */ mapping(uint16 => uint256) public chainIdToLast24HourReceiveWindowStart; /** * @notice Address on which cap check and bound limit is not applicable. */ mapping(address => bool) public whitelist; /** * @notice Emitted when address is added to whitelist. */ event SetWhitelist(address indexed addr, bool isWhitelist); /** * @notice Emitted when the maximum limit for a single transaction from local chain is modified. */ event SetMaxSingleTransactionLimit(uint16 chainId, uint256 oldMaxLimit, uint256 newMaxLimit); /** * @notice Emitted when the maximum daily limit of transactions from local chain is modified. */ event SetMaxDailyLimit(uint16 chainId, uint256 oldMaxLimit, uint256 newMaxLimit); /** * @notice Emitted when the maximum limit for a single receive transaction from remote chain is modified. */ event SetMaxSingleReceiveTransactionLimit(uint16 chainId, uint256 oldMaxLimit, uint256 newMaxLimit); /** * @notice Emitted when the maximum daily limit for receiving transactions from remote chain is modified. */ event SetMaxDailyReceiveLimit(uint16 chainId, uint256 oldMaxLimit, uint256 newMaxLimit); /** * @notice Event emitted when oracle is modified. */ event OracleChanged(address indexed oldOracle, address indexed newOracle); /** * @notice Event emitted when trusted remote sets to empty. */ event TrustedRemoteRemoved(uint16 chainId); /** * @notice Event emitted when inner token set successfully. */ event InnerTokenAdded(address indexed innerToken); /** *@notice Emitted on sweep token success */ event SweepToken(address indexed token, address indexed to, uint256 sweepAmount); /** * @notice Event emitted when SendAndCallEnabled updated successfully. */ event UpdateSendAndCallEnabled(bool indexed enabled); /** *@notice Error thrown when this contract balance is less than sweep amount */ error InsufficientBalance(uint256 sweepAmount, uint256 balance); /** * @param tokenAddress_ Address of the inner token. * @param sharedDecimals_ Number of shared decimals. * @param lzEndpoint_ Address of the layer zero endpoint contract. * @param oracle_ Address of the price oracle. * @custom:error ZeroAddressNotAllowed is thrown when token contract address is zero. * @custom:error ZeroAddressNotAllowed is thrown when lzEndpoint contract address is zero. * @custom:error ZeroAddressNotAllowed is thrown when oracle contract address is zero. * @custom:event Emits InnerTokenAdded with token address. * @custom:event Emits OracleChanged with zero address and oracle address. */ constructor( address tokenAddress_, uint8 sharedDecimals_, address lzEndpoint_, address oracle_ ) BaseOFTV2(sharedDecimals_, lzEndpoint_) { ensureNonzeroAddress(tokenAddress_); ensureNonzeroAddress(lzEndpoint_); ensureNonzeroAddress(oracle_); innerToken = IERC20(tokenAddress_); (bool success, bytes memory data) = tokenAddress_.staticcall(abi.encodeWithSignature("decimals()")); require(success, "ProxyOFT: failed to get token decimals"); uint8 decimals = abi.decode(data, (uint8)); require(sharedDecimals_ <= decimals, "ProxyOFT: sharedDecimals must be <= decimals"); ld2sdRate = 10 ** (decimals - sharedDecimals_); emit InnerTokenAdded(tokenAddress_); emit OracleChanged(address(0), oracle_); oracle = ResilientOracleInterface(oracle_); } /** * @notice Set the address of the ResilientOracle contract. * @dev Reverts if the new address is zero. * @param oracleAddress_ The new address of the ResilientOracle contract. * @custom:access Only owner. * @custom:event Emits OracleChanged with old and new oracle address. */ function setOracle(address oracleAddress_) external onlyOwner { ensureNonzeroAddress(oracleAddress_); emit OracleChanged(address(oracle), oracleAddress_); oracle = ResilientOracleInterface(oracleAddress_); } /** * @notice Sets the limit of single transaction amount. * @param chainId_ Destination chain id. * @param limit_ Amount in USD(scaled with 18 decimals). * @custom:access Only owner. * @custom:event Emits SetMaxSingleTransactionLimit with old and new limit associated with chain id. */ function setMaxSingleTransactionLimit(uint16 chainId_, uint256 limit_) external onlyOwner { require(limit_ <= chainIdToMaxDailyLimit[chainId_], "Single transaction limit > Daily limit"); emit SetMaxSingleTransactionLimit(chainId_, chainIdToMaxSingleTransactionLimit[chainId_], limit_); chainIdToMaxSingleTransactionLimit[chainId_] = limit_; } /** * @notice Sets the limit of daily (24 Hour) transactions amount. * @param chainId_ Destination chain id. * @param limit_ Amount in USD(scaled with 18 decimals). * @custom:access Only owner. * @custom:event Emits setMaxDailyLimit with old and new limit associated with chain id. */ function setMaxDailyLimit(uint16 chainId_, uint256 limit_) external onlyOwner { require(limit_ >= chainIdToMaxSingleTransactionLimit[chainId_], "Daily limit < single transaction limit"); emit SetMaxDailyLimit(chainId_, chainIdToMaxDailyLimit[chainId_], limit_); chainIdToMaxDailyLimit[chainId_] = limit_; } /** * @notice Sets the maximum limit for a single receive transaction. * @param chainId_ The destination chain ID. * @param limit_ The new maximum limit in USD(scaled with 18 decimals). * @custom:access Only owner. * @custom:event Emits setMaxSingleReceiveTransactionLimit with old and new limit associated with chain id. */ function setMaxSingleReceiveTransactionLimit(uint16 chainId_, uint256 limit_) external onlyOwner { require(limit_ <= chainIdToMaxDailyReceiveLimit[chainId_], "single receive transaction limit > Daily limit"); emit SetMaxSingleReceiveTransactionLimit(chainId_, chainIdToMaxSingleReceiveTransactionLimit[chainId_], limit_); chainIdToMaxSingleReceiveTransactionLimit[chainId_] = limit_; } /** * @notice Sets the maximum daily limit for receiving transactions. * @param chainId_ The destination chain ID. * @param limit_ The new maximum daily limit in USD(scaled with 18 decimals). * @custom:access Only owner. * @custom:event Emits setMaxDailyReceiveLimit with old and new limit associated with chain id. */ function setMaxDailyReceiveLimit(uint16 chainId_, uint256 limit_) external onlyOwner { require( limit_ >= chainIdToMaxSingleReceiveTransactionLimit[chainId_], "Daily limit < single receive transaction limit" ); emit SetMaxDailyReceiveLimit(chainId_, chainIdToMaxDailyReceiveLimit[chainId_], limit_); chainIdToMaxDailyReceiveLimit[chainId_] = limit_; } /** * @notice Sets the whitelist address to skip checks on transaction limit. * @param user_ Address to be add in whitelist. * @param val_ Boolean to be set (true for user_ address is whitelisted). * @custom:access Only owner. * @custom:event Emits setWhitelist. */ function setWhitelist(address user_, bool val_) external onlyOwner { emit SetWhitelist(user_, val_); whitelist[user_] = val_; } /** * @notice Triggers stopped state of the bridge. * @custom:access Only owner. */ function pause() external onlyOwner { _pause(); } /** * @notice Triggers resume state of the bridge. * @custom:access Only owner. */ function unpause() external onlyOwner { _unpause(); } /** * @notice A public function to sweep accidental ERC-20 transfers to this contract. Tokens are sent to user * @param token_ The address of the ERC-20 token to sweep * @param to_ The address of the recipient * @param amount_ The amount of tokens needs to transfer * @custom:event Emits SweepToken event * @custom:error Throw InsufficientBalance if amount_ is greater than the available balance of the token in the contract * @custom:access Only Owner */ function sweepToken(IERC20 token_, address to_, uint256 amount_) external onlyOwner { uint256 balance = token_.balanceOf(address(this)); if (amount_ > balance) { revert InsufficientBalance(amount_, balance); } emit SweepToken(address(token_), to_, amount_); token_.safeTransfer(to_, amount_); } /** * @notice Remove trusted remote from storage. * @param remoteChainId_ The chain's id corresponds to setting the trusted remote to empty. * @custom:access Only owner. * @custom:event Emits TrustedRemoteRemoved once chain id is removed from trusted remote. */ function removeTrustedRemote(uint16 remoteChainId_) external onlyOwner { delete trustedRemoteLookup[remoteChainId_]; emit TrustedRemoteRemoved(remoteChainId_); } /** * @notice It enables or disables sendAndCall functionality for the bridge. * @param enabled_ Boolean indicating whether the sendAndCall function should be enabled or disabled. */ function updateSendAndCallEnabled(bool enabled_) external onlyOwner { sendAndCallEnabled = enabled_; emit UpdateSendAndCallEnabled(enabled_); } /** * @notice Checks the eligibility of a sender to initiate a cross-chain token transfer. * @dev This external view function assesses whether the specified sender is eligible to transfer the given amount * to the specified destination chain. It considers factors such as whitelisting, transaction limits, and a 24-hour window. * @param from_ The sender's address initiating the transfer. * @param dstChainId_ Indicates destination chain. * @param amount_ The quantity of tokens to be transferred. * @return eligibleToSend A boolean indicating whether the sender is eligible to transfer the tokens. * @return maxSingleTransactionLimit The maximum limit for a single transaction. * @return maxDailyLimit The maximum daily limit for transactions. * @return amountInUsd The equivalent amount in USD based on the oracle price. * @return transferredInWindow The total amount transferred in the current 24-hour window. * @return last24HourWindowStart The timestamp when the current 24-hour window started. * @return isWhiteListedUser A boolean indicating whether the sender is whitelisted. */ function isEligibleToSend( address from_, uint16 dstChainId_, uint256 amount_ ) external view returns ( bool eligibleToSend, uint256 maxSingleTransactionLimit, uint256 maxDailyLimit, uint256 amountInUsd, uint256 transferredInWindow, uint256 last24HourWindowStart, bool isWhiteListedUser ) { // Check if the sender's address is whitelisted isWhiteListedUser = whitelist[from_]; // Calculate the amount in USD using the oracle price Exp memory oraclePrice = Exp({ mantissa: oracle.getPrice(token()) }); amountInUsd = mul_ScalarTruncate(oraclePrice, amount_); // Load values for the 24-hour window checks uint256 currentBlockTimestamp = block.timestamp; last24HourWindowStart = chainIdToLast24HourWindowStart[dstChainId_]; transferredInWindow = chainIdToLast24HourTransferred[dstChainId_]; maxSingleTransactionLimit = chainIdToMaxSingleTransactionLimit[dstChainId_]; maxDailyLimit = chainIdToMaxDailyLimit[dstChainId_]; if (currentBlockTimestamp - last24HourWindowStart > 1 days) { transferredInWindow = amountInUsd; last24HourWindowStart = currentBlockTimestamp; } else { transferredInWindow += amountInUsd; } eligibleToSend = (isWhiteListedUser || ((amountInUsd <= maxSingleTransactionLimit) && (transferredInWindow <= maxDailyLimit))); } /** * @notice Initiates a cross-chain token transfer and triggers a call on the destination chain. * @dev This internal override function enables the contract to send tokens and invoke calls on the specified * destination chain. It checks whether the sendAndCall feature is enabled before proceeding with the transfer. * @param from_ Address from which tokens will be debited. * @param dstChainId_ Destination chain id on which tokens will be send. * @param toAddress_ Address on which tokens will be credited on destination chain. * @param amount_ Amount of tokens that will be transferred. * @param payload_ Additional data payload for the call on the destination chain. * @param dstGasForCall_ The amount of gas allocated for the call on the destination chain. * @param callparams_ Additional parameters, including refund address, ZRO payment address, * and adapter params. */ function sendAndCall( address from_, uint16 dstChainId_, bytes32 toAddress_, uint256 amount_, bytes calldata payload_, uint64 dstGasForCall_, LzCallParams calldata callparams_ ) public payable override { require(sendAndCallEnabled, "sendAndCall is disabled"); super.sendAndCall(from_, dstChainId_, toAddress_, amount_, payload_, dstGasForCall_, callparams_); } function retryMessage( uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload ) public payable override { bytes memory trustedRemote = trustedRemoteLookup[_srcChainId]; // it will still block the message pathway from (srcChainId, srcAddress). should not receive message from untrusted remote. require( _srcAddress.length == trustedRemote.length && trustedRemote.length > 0 && keccak256(_srcAddress) == keccak256(trustedRemote), "LzApp: invalid source sending contract" ); super.retryMessage(_srcChainId, _srcAddress, _nonce, _payload); } /** * @notice Empty implementation of renounce ownership to avoid any mishappening. */ function renounceOwnership() public override {} /** * @notice Return's the address of the inner token of this bridge. * @return Address of the inner token of this bridge. */ function token() public view override returns (address) { return address(innerToken); } /** * @notice Checks if the sender is eligible to send tokens * @param from_ Sender's address sending tokens * @param dstChainId_ Chain id on which tokens should be sent * @param amount_ Amount of tokens to be sent */ function _isEligibleToSend(address from_, uint16 dstChainId_, uint256 amount_) internal { // Check if the sender's address is whitelisted bool isWhiteListedUser = whitelist[from_]; // Check if the user is whitelisted and return if true if (isWhiteListedUser) { return; } // Calculate the amount in USD using the oracle price uint256 amountInUsd; Exp memory oraclePrice = Exp({ mantissa: oracle.getPrice(token()) }); amountInUsd = mul_ScalarTruncate(oraclePrice, amount_); // Load values for the 24-hour window checks uint256 currentBlockTimestamp = block.timestamp; uint256 lastDayWindowStart = chainIdToLast24HourWindowStart[dstChainId_]; uint256 transferredInWindow = chainIdToLast24HourTransferred[dstChainId_]; uint256 maxSingleTransactionLimit = chainIdToMaxSingleTransactionLimit[dstChainId_]; uint256 maxDailyLimit = chainIdToMaxDailyLimit[dstChainId_]; // Revert if the amount exceeds the single transaction limit require(amountInUsd <= maxSingleTransactionLimit, "Single Transaction Limit Exceed"); // Check if the time window has changed (more than 24 hours have passed) if (currentBlockTimestamp - lastDayWindowStart > 1 days) { transferredInWindow = amountInUsd; chainIdToLast24HourWindowStart[dstChainId_] = currentBlockTimestamp; } else { transferredInWindow += amountInUsd; } // Revert if the amount exceeds the daily limit require(transferredInWindow <= maxDailyLimit, "Daily Transaction Limit Exceed"); // Update the amount for the 24-hour window chainIdToLast24HourTransferred[dstChainId_] = transferredInWindow; } /** * @notice Checks if receiver is able to receive tokens * @param toAddress_ Receiver address * @param srcChainId_ Source chain id from which token is send * @param receivedAmount_ Amount of tokens received */ function _isEligibleToReceive(address toAddress_, uint16 srcChainId_, uint256 receivedAmount_) internal { // Check if the recipient's address is whitelisted bool isWhiteListedUser = whitelist[toAddress_]; // Check if the user is whitelisted and return if true if (isWhiteListedUser) { return; } // Calculate the received amount in USD using the oracle price uint256 receivedAmountInUsd; Exp memory oraclePrice = Exp({ mantissa: oracle.getPrice(address(token())) }); receivedAmountInUsd = mul_ScalarTruncate(oraclePrice, receivedAmount_); uint256 currentBlockTimestamp = block.timestamp; // Load values for the 24-hour window checks for receiving uint256 lastDayReceiveWindowStart = chainIdToLast24HourReceiveWindowStart[srcChainId_]; uint256 receivedInWindow = chainIdToLast24HourReceived[srcChainId_]; uint256 maxSingleReceiveTransactionLimit = chainIdToMaxSingleReceiveTransactionLimit[srcChainId_]; uint256 maxDailyReceiveLimit = chainIdToMaxDailyReceiveLimit[srcChainId_]; // Check if the received amount exceeds the single transaction limit require(receivedAmountInUsd <= maxSingleReceiveTransactionLimit, "Single Transaction Limit Exceed"); // Check if the time window has changed (more than 24 hours have passed) if (currentBlockTimestamp - lastDayReceiveWindowStart > 1 days) { receivedInWindow = receivedAmountInUsd; chainIdToLast24HourReceiveWindowStart[srcChainId_] = currentBlockTimestamp; } else { receivedInWindow += receivedAmountInUsd; } // Revert if the received amount exceeds the daily limit require(receivedInWindow <= maxDailyReceiveLimit, "Daily Transaction Limit Exceed"); // Update the received amount for the 24-hour window chainIdToLast24HourReceived[srcChainId_] = receivedInWindow; } /** * @notice Transfer tokens from sender to receiver account. * @param from_ Address from which token has to be transferred(Sender). * @param to_ Address on which token will be tranferred(Receiver). * @param amount_ Amount of token to be transferred. * @return Actual balance difference. */ function _transferFrom( address from_, address to_, uint256 amount_ ) internal override whenNotPaused returns (uint256) { uint256 before = innerToken.balanceOf(to_); if (from_ == address(this)) { innerToken.safeTransfer(to_, amount_); } else { innerToken.safeTransferFrom(from_, to_, amount_); } return innerToken.balanceOf(to_) - before; } /** * @notice Returns Conversion rate factor from large decimals to shared decimals. * @return Conversion rate factor. */ function _ld2sdRate() internal view override returns (uint256) { return ld2sdRate; } }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.25; /** * @title IXVS * @author Venus * @notice Interface implemented by `XVS` token. */ interface IXVS { function mint(address to, uint256 amount) external; function burn(address from, uint256 amount) external; }
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000789482e37218f9b26d8d9115e356462fa9a37116000000000000000000000000000000000000000000000000000000000000000800000000000000000000000055370e0fbb5f5b8daed978ba1c075a499eb107b80000000000000000000000006c01eca2b5c97f135406a3a5531445a7d977d28e
-----Decoded View---------------
Arg [0] : tokenAddress_ (address): 0x789482e37218f9b26d8D9115E356462fA9A37116
Arg [1] : sharedDecimals_ (uint8): 8
Arg [2] : lzEndpoint_ (address): 0x55370E0fBB5f5b8dAeD978BA1c075a499eB107B8
Arg [3] : oracle_ (address): 0x6c01ECa2B5C97F135406a3A5531445A7d977D28e
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000789482e37218f9b26d8d9115e356462fa9a37116
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [2] : 00000000000000000000000055370e0fbb5f5b8daed978ba1c075a499eb107b8
Arg [3] : 0000000000000000000000006c01eca2b5c97f135406a3a5531445a7d977d28e
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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.