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Setup | 17960142 | 267 days ago | IN | 0 ETH | 0.00065003 | ||||
Setup | 17960136 | 267 days ago | IN | 0 ETH | 0.00072778 | ||||
Setup | 16280189 | 503 days ago | IN | 0 ETH | 0.00064526 | ||||
Setup | 16210602 | 513 days ago | IN | 0 ETH | 0.00069364 | ||||
Setup | 16208044 | 513 days ago | IN | 0 ETH | 0.00065565 | ||||
Setup | 16206746 | 513 days ago | IN | 0 ETH | 0.00061488 | ||||
Setup | 16206734 | 513 days ago | IN | 0 ETH | 0.0025654 | ||||
0x60806040 | 13217338 | 974 days ago | IN | Create: BridgeSetup | 0 ETH | 0.0160233 |
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Contract Name:
BridgeSetup
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// contracts/BridgeSetup.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; pragma experimental ABIEncoderV2; import "./BridgeGovernance.sol"; import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol"; contract BridgeSetup is BridgeSetters, ERC1967Upgrade { function setup( address implementation, uint16 chainId, address wormhole, uint16 governanceChainId, bytes32 governanceContract, address tokenImplementation, address WETH ) public { setChainId(chainId); setWormhole(wormhole); setGovernanceChainId(governanceChainId); setGovernanceContract(governanceContract); setTokenImplementation(tokenImplementation); setWETH(WETH); // Register Solana bridge setBridgeImplementation(1, 0xec7372995d5cc8732397fb0ad35c0121e0eaa90d26f828a534cab54391b3a4f5); _upgradeTo(implementation); } }
// contracts/Structs.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; interface Structs { struct Provider { uint16 chainId; uint16 governanceChainId; bytes32 governanceContract; } struct GuardianSet { address[] keys; uint32 expirationTime; } struct Signature { bytes32 r; bytes32 s; uint8 v; uint8 guardianIndex; } struct VM { uint8 version; uint32 timestamp; uint32 nonce; uint16 emitterChainId; bytes32 emitterAddress; uint64 sequence; uint8 consistencyLevel; bytes payload; uint32 guardianSetIndex; Signature[] signatures; bytes32 hash; } }
// contracts/Getters.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "../interfaces/IWormhole.sol"; import "./BridgeState.sol"; contract BridgeGetters is BridgeState { function governanceActionIsConsumed(bytes32 hash) public view returns (bool) { return _state.consumedGovernanceActions[hash]; } function isInitialized(address impl) public view returns (bool) { return _state.initializedImplementations[impl]; } function isTransferCompleted(bytes32 hash) public view returns (bool) { return _state.completedTransfers[hash]; } function wormhole() public view returns (IWormhole) { return IWormhole(_state.wormhole); } function chainId() public view returns (uint16){ return _state.provider.chainId; } function governanceChainId() public view returns (uint16){ return _state.provider.governanceChainId; } function governanceContract() public view returns (bytes32){ return _state.provider.governanceContract; } function wrappedAsset(uint16 tokenChainId, bytes32 tokenAddress) public view returns (address){ return _state.wrappedAssets[tokenChainId][tokenAddress]; } function bridgeContracts(uint16 chainId_) public view returns (bytes32){ return _state.bridgeImplementations[chainId_]; } function tokenImplementation() public view returns (address){ return _state.tokenImplementation; } function WETH() public view returns (IWETH){ return IWETH(_state.provider.WETH); } function outstandingBridged(address token) public view returns (uint256){ return _state.outstandingBridged[token]; } function isWrappedAsset(address token) public view returns (bool){ return _state.isWrappedAsset[token]; } } interface IWETH is IERC20 { function deposit() external payable; function withdraw(uint amount) external; }
// contracts/Bridge.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol"; import "../libraries/external/BytesLib.sol"; import "./BridgeGetters.sol"; import "./BridgeSetters.sol"; import "./BridgeStructs.sol"; import "./token/Token.sol"; import "./token/TokenImplementation.sol"; import "../interfaces/IWormhole.sol"; contract BridgeGovernance is BridgeGetters, BridgeSetters, ERC1967Upgrade { using BytesLib for bytes; // "TokenBridge" (left padded) bytes32 constant module = 0x000000000000000000000000000000000000000000546f6b656e427269646765; // Execute a RegisterChain governance message function registerChain(bytes memory encodedVM) public { (IWormhole.VM memory vm, bool valid, string memory reason) = verifyGovernanceVM(encodedVM); require(valid, reason); setGovernanceActionConsumed(vm.hash); BridgeStructs.RegisterChain memory chain = parseRegisterChain(vm.payload); require(chain.chainId == chainId() || chain.chainId == 0, "invalid chain id"); require(bridgeContracts(chain.emitterChainID) == bytes32(0), "chain already registered"); setBridgeImplementation(chain.emitterChainID, chain.emitterAddress); } // Execute a UpgradeContract governance message function upgrade(bytes memory encodedVM) public { (IWormhole.VM memory vm, bool valid, string memory reason) = verifyGovernanceVM(encodedVM); require(valid, reason); setGovernanceActionConsumed(vm.hash); BridgeStructs.UpgradeContract memory implementation = parseUpgrade(vm.payload); require(implementation.chainId == chainId(), "wrong chain id"); upgradeImplementation(address(uint160(uint256(implementation.newContract)))); } function verifyGovernanceVM(bytes memory encodedVM) internal view returns (IWormhole.VM memory parsedVM, bool isValid, string memory invalidReason){ (IWormhole.VM memory vm, bool valid, string memory reason) = wormhole().parseAndVerifyVM(encodedVM); if (!valid) { return (vm, valid, reason); } if (vm.emitterChainId != governanceChainId()) { return (vm, false, "wrong governance chain"); } if (vm.emitterAddress != governanceContract()) { return (vm, false, "wrong governance contract"); } if (governanceActionIsConsumed(vm.hash)) { return (vm, false, "governance action already consumed"); } return (vm, true, ""); } event ContractUpgraded(address indexed oldContract, address indexed newContract); function upgradeImplementation(address newImplementation) internal { address currentImplementation = _getImplementation(); _upgradeTo(newImplementation); // Call initialize function of the new implementation (bool success, bytes memory reason) = newImplementation.delegatecall(abi.encodeWithSignature("initialize()")); require(success, string(reason)); emit ContractUpgraded(currentImplementation, newImplementation); } function parseRegisterChain(bytes memory encoded) public pure returns (BridgeStructs.RegisterChain memory chain) { uint index = 0; // governance header chain.module = encoded.toBytes32(index); index += 32; require(chain.module == module, "invalid RegisterChain: wrong module"); chain.action = encoded.toUint8(index); index += 1; require(chain.action == 1, "invalid RegisterChain: wrong action"); chain.chainId = encoded.toUint16(index); index += 2; // payload chain.emitterChainID = encoded.toUint16(index); index += 2; chain.emitterAddress = encoded.toBytes32(index); index += 32; require(encoded.length == index, "invalid RegisterChain: wrong length"); } function parseUpgrade(bytes memory encoded) public pure returns (BridgeStructs.UpgradeContract memory chain) { uint index = 0; // governance header chain.module = encoded.toBytes32(index); index += 32; require(chain.module == module, "invalid UpgradeContract: wrong module"); chain.action = encoded.toUint8(index); index += 1; require(chain.action == 2, "invalid UpgradeContract: wrong action"); chain.chainId = encoded.toUint16(index); index += 2; // payload chain.newContract = encoded.toBytes32(index); index += 32; require(encoded.length == index, "invalid UpgradeContract: wrong length"); } }
// contracts/Setters.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./BridgeState.sol"; contract BridgeSetters is BridgeState { function setInitialized(address implementatiom) internal { _state.initializedImplementations[implementatiom] = true; } function setGovernanceActionConsumed(bytes32 hash) internal { _state.consumedGovernanceActions[hash] = true; } function setTransferCompleted(bytes32 hash) internal { _state.completedTransfers[hash] = true; } function setChainId(uint16 chainId) internal { _state.provider.chainId = chainId; } function setGovernanceChainId(uint16 chainId) internal { _state.provider.governanceChainId = chainId; } function setGovernanceContract(bytes32 governanceContract) internal { _state.provider.governanceContract = governanceContract; } function setBridgeImplementation(uint16 chainId, bytes32 bridgeContract) internal { _state.bridgeImplementations[chainId] = bridgeContract; } function setTokenImplementation(address impl) internal { _state.tokenImplementation = impl; } function setWETH(address weth) internal { _state.provider.WETH = weth; } function setWormhole(address wh) internal { _state.wormhole = payable(wh); } function setWrappedAsset(uint16 tokenChainId, bytes32 tokenAddress, address wrapper) internal { _state.wrappedAssets[tokenChainId][tokenAddress] = wrapper; _state.isWrappedAsset[wrapper] = true; } function setOutstandingBridged(address token, uint256 outstanding) internal { _state.outstandingBridged[token] = outstanding; } }
// contracts/State.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./BridgeStructs.sol"; contract BridgeStorage { struct Provider { uint16 chainId; uint16 governanceChainId; bytes32 governanceContract; address WETH; } struct Asset { uint16 chainId; bytes32 assetAddress; } struct State { address payable wormhole; address tokenImplementation; Provider provider; // Mapping of consumed governance actions mapping(bytes32 => bool) consumedGovernanceActions; // Mapping of consumed token transfers mapping(bytes32 => bool) completedTransfers; // Mapping of initialized implementations mapping(address => bool) initializedImplementations; // Mapping of wrapped assets (chainID => nativeAddress => wrappedAddress) mapping(uint16 => mapping(bytes32 => address)) wrappedAssets; // Mapping to safely identify wrapped assets mapping(address => bool) isWrappedAsset; // Mapping of native assets to amount outstanding on other chains mapping(address => uint256) outstandingBridged; // Mapping of bridge contracts on other chains mapping(uint16 => bytes32) bridgeImplementations; } } contract BridgeState { BridgeStorage.State _state; }
// contracts/Structs.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; contract BridgeStructs { struct Transfer { // PayloadID uint8 = 1 uint8 payloadID; // Amount being transferred (big-endian uint256) uint256 amount; // Address of the token. Left-zero-padded if shorter than 32 bytes bytes32 tokenAddress; // Chain ID of the token uint16 tokenChain; // Address of the recipient. Left-zero-padded if shorter than 32 bytes bytes32 to; // Chain ID of the recipient uint16 toChain; // Amount of tokens (big-endian uint256) that the user is willing to pay as relayer fee. Must be <= Amount. uint256 fee; } struct AssetMeta { // PayloadID uint8 = 2 uint8 payloadID; // Address of the token. Left-zero-padded if shorter than 32 bytes bytes32 tokenAddress; // Chain ID of the token uint16 tokenChain; // Number of decimals of the token (big-endian uint256) uint8 decimals; // Symbol of the token (UTF-8) bytes32 symbol; // Name of the token (UTF-8) bytes32 name; } struct RegisterChain { // Governance Header // module: "TokenBridge" left-padded bytes32 module; // governance action: 1 uint8 action; // governance paket chain id: this or 0 uint16 chainId; // Chain ID uint16 emitterChainID; // Emitter address. Left-zero-padded if shorter than 32 bytes bytes32 emitterAddress; } struct UpgradeContract { // Governance Header // module: "TokenBridge" left-padded bytes32 module; // governance action: 2 uint8 action; // governance paket chain id uint16 chainId; // Address of the new contract bytes32 newContract; } }
// contracts/Structs.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "@openzeppelin/contracts/proxy/beacon/BeaconProxy.sol"; contract BridgeToken is BeaconProxy { constructor(address beacon, bytes memory data) BeaconProxy(beacon, data) { } }
// contracts/TokenImplementation.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./TokenState.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/proxy/beacon/BeaconProxy.sol"; // Based on the OpenZepplin ERC20 implementation, licensed under MIT contract TokenImplementation is TokenState, Context { event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); function initialize( string memory name_, string memory symbol_, uint8 decimals_, uint64 sequence_, address owner_, uint16 chainId_, bytes32 nativeContract_ ) initializer public { _state.name = name_; _state.symbol = symbol_; _state.decimals = decimals_; _state.metaLastUpdatedSequence = sequence_; _state.owner = owner_; _state.chainId = chainId_; _state.nativeContract = nativeContract_; } function name() public view returns (string memory) { return string(abi.encodePacked(_state.name, " (Wormhole)")); } function symbol() public view returns (string memory) { return _state.symbol; } function owner() public view returns (address) { return _state.owner; } function decimals() public view returns (uint8) { return _state.decimals; } function totalSupply() public view returns (uint256) { return _state.totalSupply; } function chainId() public view returns (uint16) { return _state.chainId; } function nativeContract() public view returns (bytes32) { return _state.nativeContract; } function balanceOf(address account_) public view returns (uint256) { return _state.balances[account_]; } function transfer(address recipient_, uint256 amount_) public returns (bool) { _transfer(_msgSender(), recipient_, amount_); return true; } function allowance(address owner_, address spender_) public view returns (uint256) { return _state.allowances[owner_][spender_]; } function approve(address spender_, uint256 amount_) public returns (bool) { _approve(_msgSender(), spender_, amount_); return true; } function transferFrom(address sender_, address recipient_, uint256 amount_) public returns (bool) { _transfer(sender_, recipient_, amount_); uint256 currentAllowance = _state.allowances[sender_][_msgSender()]; require(currentAllowance >= amount_, "ERC20: transfer amount exceeds allowance"); _approve(sender_, _msgSender(), currentAllowance - amount_); return true; } function increaseAllowance(address spender_, uint256 addedValue_) public returns (bool) { _approve(_msgSender(), spender_, _state.allowances[_msgSender()][spender_] + addedValue_); return true; } function decreaseAllowance(address spender_, uint256 subtractedValue_) public returns (bool) { uint256 currentAllowance = _state.allowances[_msgSender()][spender_]; require(currentAllowance >= subtractedValue_, "ERC20: decreased allowance below zero"); _approve(_msgSender(), spender_, currentAllowance - subtractedValue_); return true; } function _transfer(address sender_, address recipient_, uint256 amount_) internal { require(sender_ != address(0), "ERC20: transfer from the zero address"); require(recipient_ != address(0), "ERC20: transfer to the zero address"); uint256 senderBalance = _state.balances[sender_]; require(senderBalance >= amount_, "ERC20: transfer amount exceeds balance"); _state.balances[sender_] = senderBalance - amount_; _state.balances[recipient_] += amount_; emit Transfer(sender_, recipient_, amount_); } function mint(address account_, uint256 amount_) public onlyOwner { _mint(account_, amount_); } function _mint(address account_, uint256 amount_) internal { require(account_ != address(0), "ERC20: mint to the zero address"); _state.totalSupply += amount_; _state.balances[account_] += amount_; emit Transfer(address(0), account_, amount_); } function burn(address account_, uint256 amount_) public onlyOwner { _burn(account_, amount_); } function _burn(address account_, uint256 amount_) internal { require(account_ != address(0), "ERC20: burn from the zero address"); uint256 accountBalance = _state.balances[account_]; require(accountBalance >= amount_, "ERC20: burn amount exceeds balance"); _state.balances[account_] = accountBalance - amount_; _state.totalSupply -= amount_; emit Transfer(account_, address(0), amount_); } function _approve(address owner_, address spender_, uint256 amount_) internal virtual { require(owner_ != address(0), "ERC20: approve from the zero address"); require(spender_ != address(0), "ERC20: approve to the zero address"); _state.allowances[owner_][spender_] = amount_; emit Approval(owner_, spender_, amount_); } function updateDetails(string memory name_, string memory symbol_, uint64 sequence_) public onlyOwner { require(_state.metaLastUpdatedSequence < sequence_, "current metadata is up to date"); _state.name = name_; _state.symbol = symbol_; _state.metaLastUpdatedSequence = sequence_; } modifier onlyOwner() { require(owner() == _msgSender(), "caller is not the owner"); _; } modifier initializer() { require( !_state.initialized, "Already initialized" ); _state.initialized = true; _; } }
// contracts/State.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; contract TokenStorage { struct State { string name; string symbol; uint64 metaLastUpdatedSequence; uint256 totalSupply; uint8 decimals; mapping(address => uint256) balances; mapping(address => mapping(address => uint256)) allowances; address owner; bool initialized; uint16 chainId; bytes32 nativeContract; } } contract TokenState { TokenStorage.State _state; }
// contracts/Messages.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "../Structs.sol"; interface IWormhole is Structs { event LogMessagePublished(address indexed sender, uint64 sequence, uint32 nonce, bytes payload, uint8 consistencyLevel); function publishMessage( uint32 nonce, bytes memory payload, uint8 consistencyLevel ) external payable returns (uint64 sequence); function parseAndVerifyVM(bytes calldata encodedVM) external view returns (Structs.VM memory vm, bool valid, string memory reason); function verifyVM(Structs.VM memory vm) external view returns (bool valid, string memory reason); function verifySignatures(bytes32 hash, Structs.Signature[] memory signatures, Structs.GuardianSet memory guardianSet) external pure returns (bool valid, string memory reason) ; function parseVM(bytes memory encodedVM) external pure returns (Structs.VM memory vm); function getGuardianSet(uint32 index) external view returns (Structs.GuardianSet memory) ; function getCurrentGuardianSetIndex() external view returns (uint32) ; function getGuardianSetExpiry() external view returns (uint32) ; function governanceActionIsConsumed(bytes32 hash) external view returns (bool) ; function isInitialized(address impl) external view returns (bool) ; function chainId() external view returns (uint16) ; function governanceChainId() external view returns (uint16); function governanceContract() external view returns (bytes32); function messageFee() external view returns (uint256) ; }
// SPDX-License-Identifier: Unlicense /* * @title Solidity Bytes Arrays Utils * @author Gonçalo Sá <[email protected]> * * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity. * The library lets you concatenate, slice and type cast bytes arrays both in memory and storage. */ pragma solidity >=0.8.0 <0.9.0; library BytesLib { function concat( bytes memory _preBytes, bytes memory _postBytes ) internal pure returns (bytes memory) { bytes memory tempBytes; assembly { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // Store the length of the first bytes array at the beginning of // the memory for tempBytes. let length := mload(_preBytes) mstore(tempBytes, length) // Maintain a memory counter for the current write location in the // temp bytes array by adding the 32 bytes for the array length to // the starting location. let mc := add(tempBytes, 0x20) // Stop copying when the memory counter reaches the length of the // first bytes array. let end := add(mc, length) for { // Initialize a copy counter to the start of the _preBytes data, // 32 bytes into its memory. let cc := add(_preBytes, 0x20) } lt(mc, end) { // Increase both counters by 32 bytes each iteration. mc := add(mc, 0x20) cc := add(cc, 0x20) } { // Write the _preBytes data into the tempBytes memory 32 bytes // at a time. mstore(mc, mload(cc)) } // Add the length of _postBytes to the current length of tempBytes // and store it as the new length in the first 32 bytes of the // tempBytes memory. length := mload(_postBytes) mstore(tempBytes, add(length, mload(tempBytes))) // Move the memory counter back from a multiple of 0x20 to the // actual end of the _preBytes data. mc := end // Stop copying when the memory counter reaches the new combined // length of the arrays. end := add(mc, length) for { let cc := add(_postBytes, 0x20) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } // Update the free-memory pointer by padding our last write location // to 32 bytes: add 31 bytes to the end of tempBytes to move to the // next 32 byte block, then round down to the nearest multiple of // 32. If the sum of the length of the two arrays is zero then add // one before rounding down to leave a blank 32 bytes (the length block with 0). mstore(0x40, and( add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31) // Round down to the nearest 32 bytes. )) } return tempBytes; } function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal { assembly { // Read the first 32 bytes of _preBytes storage, which is the length // of the array. (We don't need to use the offset into the slot // because arrays use the entire slot.) let fslot := sload(_preBytes.slot) // Arrays of 31 bytes or less have an even value in their slot, // while longer arrays have an odd value. The actual length is // the slot divided by two for odd values, and the lowest order // byte divided by two for even values. // If the slot is even, bitwise and the slot with 255 and divide by // two to get the length. If the slot is odd, bitwise and the slot // with -1 and divide by two. let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2) let mlength := mload(_postBytes) let newlength := add(slength, mlength) // slength can contain both the length and contents of the array // if length < 32 bytes so let's prepare for that // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage switch add(lt(slength, 32), lt(newlength, 32)) case 2 { // Since the new array still fits in the slot, we just need to // update the contents of the slot. // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length sstore( _preBytes.slot, // all the modifications to the slot are inside this // next block add( // we can just add to the slot contents because the // bytes we want to change are the LSBs fslot, add( mul( div( // load the bytes from memory mload(add(_postBytes, 0x20)), // zero all bytes to the right exp(0x100, sub(32, mlength)) ), // and now shift left the number of bytes to // leave space for the length in the slot exp(0x100, sub(32, newlength)) ), // increase length by the double of the memory // bytes length mul(mlength, 2) ) ) ) } case 1 { // The stored value fits in the slot, but the combined value // will exceed it. // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // The contents of the _postBytes array start 32 bytes into // the structure. Our first read should obtain the `submod` // bytes that can fit into the unused space in the last word // of the stored array. To get this, we read 32 bytes starting // from `submod`, so the data we read overlaps with the array // contents by `submod` bytes. Masking the lowest-order // `submod` bytes allows us to add that value directly to the // stored value. let submod := sub(32, slength) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore( sc, add( and( fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00 ), and(mload(mc), mask) ) ) for { mc := add(mc, 0x20) sc := add(sc, 1) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } default { // get the keccak hash to get the contents of the array mstore(0x0, _preBytes.slot) // Start copying to the last used word of the stored array. let sc := add(keccak256(0x0, 0x20), div(slength, 32)) // save new length sstore(_preBytes.slot, add(mul(newlength, 2), 1)) // Copy over the first `submod` bytes of the new data as in // case 1 above. let slengthmod := mod(slength, 32) let mlengthmod := mod(mlength, 32) let submod := sub(32, slengthmod) let mc := add(_postBytes, submod) let end := add(_postBytes, mlength) let mask := sub(exp(0x100, submod), 1) sstore(sc, add(sload(sc), and(mload(mc), mask))) for { sc := add(sc, 1) mc := add(mc, 0x20) } lt(mc, end) { sc := add(sc, 1) mc := add(mc, 0x20) } { sstore(sc, mload(mc)) } mask := exp(0x100, sub(mc, end)) sstore(sc, mul(div(mload(mc), mask), mask)) } } } function slice( bytes memory _bytes, uint256 _start, uint256 _length ) internal pure returns (bytes memory) { require(_length + 31 >= _length, "slice_overflow"); require(_bytes.length >= _start + _length, "slice_outOfBounds"); bytes memory tempBytes; assembly { switch iszero(_length) case 0 { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // The first word of the slice result is potentially a partial // word read from the original array. To read it, we calculate // the length of that partial word and start copying that many // bytes into the array. The first word we copy will start with // data we don't care about, but the last `lengthmod` bytes will // land at the beginning of the contents of the new array. When // we're done copying, we overwrite the full first word with // the actual length of the slice. let lengthmod := and(_length, 31) // The multiplication in the next line is necessary // because when slicing multiples of 32 bytes (lengthmod == 0) // the following copy loop was copying the origin's length // and then ending prematurely not copying everything it should. let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod))) let end := add(mc, _length) for { // The multiplication in the next line has the same exact purpose // as the one above. let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } mstore(tempBytes, _length) //update free-memory pointer //allocating the array padded to 32 bytes like the compiler does now mstore(0x40, and(add(mc, 31), not(31))) } //if we want a zero-length slice let's just return a zero-length array default { tempBytes := mload(0x40) //zero out the 32 bytes slice we are about to return //we need to do it because Solidity does not garbage collect mstore(tempBytes, 0) mstore(0x40, add(tempBytes, 0x20)) } } return tempBytes; } function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) { require(_bytes.length >= _start + 20, "toAddress_outOfBounds"); address tempAddress; assembly { tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000) } return tempAddress; } function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) { require(_bytes.length >= _start + 1 , "toUint8_outOfBounds"); uint8 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x1), _start)) } return tempUint; } function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) { require(_bytes.length >= _start + 2, "toUint16_outOfBounds"); uint16 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x2), _start)) } return tempUint; } function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) { require(_bytes.length >= _start + 4, "toUint32_outOfBounds"); uint32 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x4), _start)) } return tempUint; } function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) { require(_bytes.length >= _start + 8, "toUint64_outOfBounds"); uint64 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x8), _start)) } return tempUint; } function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) { require(_bytes.length >= _start + 12, "toUint96_outOfBounds"); uint96 tempUint; assembly { tempUint := mload(add(add(_bytes, 0xc), _start)) } return tempUint; } function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) { require(_bytes.length >= _start + 16, "toUint128_outOfBounds"); uint128 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x10), _start)) } return tempUint; } function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) { require(_bytes.length >= _start + 32, "toUint256_outOfBounds"); uint256 tempUint; assembly { tempUint := mload(add(add(_bytes, 0x20), _start)) } return tempUint; } function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) { require(_bytes.length >= _start + 32, "toBytes32_outOfBounds"); bytes32 tempBytes32; assembly { tempBytes32 := mload(add(add(_bytes, 0x20), _start)) } return tempBytes32; } function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) { bool success = true; assembly { let length := mload(_preBytes) // if lengths don't match the arrays are not equal switch eq(length, mload(_postBytes)) case 1 { // cb is a circuit breaker in the for loop since there's // no said feature for inline assembly loops // cb = 1 - don't breaker // cb = 0 - break let cb := 1 let mc := add(_preBytes, 0x20) let end := add(mc, length) for { let cc := add(_postBytes, 0x20) // the next line is the loop condition: // while(uint256(mc < end) + cb == 2) } eq(add(lt(mc, end), cb), 2) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { // if any of these checks fails then arrays are not equal if iszero(eq(mload(mc), mload(cc))) { // unsuccess: success := 0 cb := 0 } } } default { // unsuccess: success := 0 } } return success; } function 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 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 () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = 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"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.2; import "../beacon/IBeacon.sol"; import "../../utils/Address.sol"; import "../../utils/StorageSlot.sol"; /** * @dev This abstract contract provides getters and event emitting update functions for * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots. * * _Available since v4.1._ * * @custom:oz-upgrades-unsafe-allow delegatecall */ abstract contract ERC1967Upgrade { // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1 bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143; /** * @dev Storage slot with the address of the current implementation. * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is * validated in the constructor. */ bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; /** * @dev Emitted when the implementation is upgraded. */ event Upgraded(address indexed implementation); /** * @dev Returns the current implementation address. */ function _getImplementation() internal view returns (address) { return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; } /** * @dev Stores a new address in the EIP1967 implementation slot. */ function _setImplementation(address newImplementation) private { require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; } /** * @dev Perform implementation upgrade * * Emits an {Upgraded} event. */ function _upgradeTo(address newImplementation) internal { _setImplementation(newImplementation); emit Upgraded(newImplementation); } /** * @dev Perform implementation upgrade with additional setup call. * * Emits an {Upgraded} event. */ function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal { _setImplementation(newImplementation); emit Upgraded(newImplementation); if (data.length > 0 || forceCall) { Address.functionDelegateCall(newImplementation, data); } } /** * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call. * * Emits an {Upgraded} event. */ function _upgradeToAndCallSecure(address newImplementation, bytes memory data, bool forceCall) internal { address oldImplementation = _getImplementation(); // Initial upgrade and setup call _setImplementation(newImplementation); if (data.length > 0 || forceCall) { Address.functionDelegateCall(newImplementation, data); } // Perform rollback test if not already in progress StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT); if (!rollbackTesting.value) { // Trigger rollback using upgradeTo from the new implementation rollbackTesting.value = true; Address.functionDelegateCall( newImplementation, abi.encodeWithSignature( "upgradeTo(address)", oldImplementation ) ); rollbackTesting.value = false; // Check rollback was effective require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades"); // Finally reset to the new implementation and log the upgrade _setImplementation(newImplementation); emit Upgraded(newImplementation); } } /** * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that). * * Emits a {BeaconUpgraded} event. */ function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal { _setBeacon(newBeacon); emit BeaconUpgraded(newBeacon); if (data.length > 0 || forceCall) { Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data); } } /** * @dev Storage slot with the admin of the contract. * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is * validated in the constructor. */ bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103; /** * @dev Emitted when the admin account has changed. */ event AdminChanged(address previousAdmin, address newAdmin); /** * @dev Returns the current admin. */ function _getAdmin() internal view returns (address) { return StorageSlot.getAddressSlot(_ADMIN_SLOT).value; } /** * @dev Stores a new address in the EIP1967 admin slot. */ function _setAdmin(address newAdmin) private { require(newAdmin != address(0), "ERC1967: new admin is the zero address"); StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin; } /** * @dev Changes the admin of the proxy. * * Emits an {AdminChanged} event. */ function _changeAdmin(address newAdmin) internal { emit AdminChanged(_getAdmin(), newAdmin); _setAdmin(newAdmin); } /** * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy. * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor. */ bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50; /** * @dev Emitted when the beacon is upgraded. */ event BeaconUpgraded(address indexed beacon); /** * @dev Returns the current beacon. */ function _getBeacon() internal view returns (address) { return StorageSlot.getAddressSlot(_BEACON_SLOT).value; } /** * @dev Stores a new beacon in the EIP1967 beacon slot. */ function _setBeacon(address newBeacon) private { require( Address.isContract(newBeacon), "ERC1967: new beacon is not a contract" ); require( Address.isContract(IBeacon(newBeacon).implementation()), "ERC1967: beacon implementation is not a contract" ); StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to * be specified by overriding the virtual {_implementation} function. * * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a * different contract through the {_delegate} function. * * The success and return data of the delegated call will be returned back to the caller of the proxy. */ abstract contract Proxy { /** * @dev Delegates the current call to `implementation`. * * This function does not return to its internall call site, it will return directly to the external caller. */ function _delegate(address implementation) internal virtual { // solhint-disable-next-line no-inline-assembly assembly { // Copy msg.data. We take full control of memory in this inline assembly // block because it will not return to Solidity code. We overwrite the // Solidity scratch pad at memory position 0. calldatacopy(0, 0, calldatasize()) // Call the implementation. // out and outsize are 0 because we don't know the size yet. let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0) // Copy the returned data. returndatacopy(0, 0, returndatasize()) switch result // delegatecall returns 0 on error. case 0 { revert(0, returndatasize()) } default { return(0, returndatasize()) } } } /** * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function * and {_fallback} should delegate. */ function _implementation() internal view virtual returns (address); /** * @dev Delegates the current call to the address returned by `_implementation()`. * * This function does not return to its internall call site, it will return directly to the external caller. */ function _fallback() internal virtual { _beforeFallback(); _delegate(_implementation()); } /** * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other * function in the contract matches the call data. */ fallback () external payable virtual { _fallback(); } /** * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data * is empty. */ receive () external payable virtual { _fallback(); } /** * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback` * call, or as part of the Solidity `fallback` or `receive` functions. * * If overriden should call `super._beforeFallback()`. */ function _beforeFallback() internal virtual { } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IBeacon.sol"; import "../Proxy.sol"; import "../ERC1967/ERC1967Upgrade.sol"; /** * @dev This contract implements a proxy that gets the implementation address for each call from a {UpgradeableBeacon}. * * The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't * conflict with the storage layout of the implementation behind the proxy. * * _Available since v3.4._ */ contract BeaconProxy is Proxy, ERC1967Upgrade { /** * @dev Initializes the proxy with `beacon`. * * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This * will typically be an encoded function call, and allows initializating the storage of the proxy like a Solidity * constructor. * * Requirements: * * - `beacon` must be a contract with the interface {IBeacon}. */ constructor(address beacon, bytes memory data) payable { assert(_BEACON_SLOT == bytes32(uint256(keccak256("eip1967.proxy.beacon")) - 1)); _upgradeBeaconToAndCall(beacon, data, false); } /** * @dev Returns the current beacon address. */ function _beacon() internal view virtual returns (address) { return _getBeacon(); } /** * @dev Returns the current implementation address of the associated beacon. */ function _implementation() internal view virtual override returns (address) { return IBeacon(_getBeacon()).implementation(); } /** * @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}. * * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. * * Requirements: * * - `beacon` must be a contract. * - The implementation returned by `beacon` must be a contract. */ function _setBeacon(address beacon, bytes memory data) internal virtual { _upgradeBeaconToAndCall(beacon, data, false); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev This is the interface that {BeaconProxy} expects of its beacon. */ interface IBeacon { /** * @dev Must return an address that can be used as a delegate call target. * * {BeaconProxy} will check that this address is a contract. */ function implementation() external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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 `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool); /** * @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); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.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; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } 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' // solhint-disable-next-line max-line-length 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)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } 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"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @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"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @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 * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 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://diligence.consensys.net/posts/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/v0.5.11/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"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (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 functionCall(target, data, "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"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(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) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(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) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // 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 // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT 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) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ``` * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` * * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._ */ library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { assembly { r.slot := slot } } }
{ "remappings": [], "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "istanbul", "libraries": {}, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } } }
Contract Security Audit
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[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"beacon","type":"address"}],"name":"BeaconUpgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"inputs":[{"internalType":"address","name":"implementation","type":"address"},{"internalType":"uint16","name":"chainId","type":"uint16"},{"internalType":"address","name":"wormhole","type":"address"},{"internalType":"uint16","name":"governanceChainId","type":"uint16"},{"internalType":"bytes32","name":"governanceContract","type":"bytes32"},{"internalType":"address","name":"tokenImplementation","type":"address"},{"internalType":"address","name":"WETH","type":"address"}],"name":"setup","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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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.