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Contract Name:
Implementation
Compiler Version
v0.8.4+commit.c7e474f2
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Yes with 200 runs
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// contracts/Implementation.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; pragma experimental ABIEncoderV2; import "./Governance.sol"; import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol"; contract Implementation is Governance { event LogMessagePublished(address indexed sender, uint64 sequence, uint32 nonce, bytes payload, uint8 consistencyLevel); // Publish a message to be attested by the Wormhole network function publishMessage( uint32 nonce, bytes memory payload, uint8 consistencyLevel ) public payable returns (uint64 sequence) { // check fee require(msg.value == messageFee(), "invalid fee"); sequence = useSequence(msg.sender); // emit log emit LogMessagePublished(msg.sender, sequence, nonce, payload, consistencyLevel); } function useSequence(address emitter) internal returns (uint64 sequence) { sequence = nextSequence(emitter); setNextSequence(emitter, sequence + 1); } function initialize() initializer public virtual { // this function needs to be exposed for an upgrade to pass uint256 evmChainId; uint16 chain = chainId(); // Wormhole chain ids explicitly enumerated if (chain == 2) { evmChainId = 1; // ethereum } else if (chain == 4) { evmChainId = 56; // bsc } else if (chain == 5) { evmChainId = 137; // polygon } else if (chain == 6) { evmChainId = 43114; // avalanche } else if (chain == 7) { evmChainId = 42262; // oasis } else if (chain == 9) { evmChainId = 1313161554; // aurora } else if (chain == 10) { evmChainId = 250; // fantom } else if (chain == 11) { evmChainId = 686; // karura } else if (chain == 12) { evmChainId = 787; // acala } else if (chain == 13) { evmChainId = 8217; // klaytn } else if (chain == 14) { evmChainId = 42220; // celo } else if (chain == 16) { evmChainId = 1284; // moonbeam } else if (chain == 17) { evmChainId = 245022934; // neon } else if (chain == 23) { evmChainId = 42161; // arbitrum } else if (chain == 24) { evmChainId = 10; // optimism } else if (chain == 25) { evmChainId = 100; // gnosis } else { revert("Unknown chain id."); } setEvmChainId(evmChainId); } modifier initializer() { address implementation = ERC1967Upgrade._getImplementation(); require( !isInitialized(implementation), "already initialized" ); setInitialized(implementation); _; } fallback() external payable {revert("unsupported");} receive() external payable {revert("the Wormhole contract does not accept assets");} }
// 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 { _upgradeTo(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 _upgradeTo(newImplementation); } } /** * @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; } /** * @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); } } }
// 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 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; 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"); (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"); (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"); (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"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason 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 { // 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 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 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 } } }
// contracts/Getters.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./State.sol"; contract Getters is State { function getGuardianSet(uint32 index) public view returns (Structs.GuardianSet memory) { return _state.guardianSets[index]; } function getCurrentGuardianSetIndex() public view returns (uint32) { return _state.guardianSetIndex; } function getGuardianSetExpiry() public view returns (uint32) { return _state.guardianSetExpiry; } 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 chainId() public view returns (uint16) { return _state.provider.chainId; } function evmChainId() public view returns (uint256) { return _state.evmChainId; } function isFork() public view returns (bool) { return evmChainId() != block.chainid; } function governanceChainId() public view returns (uint16){ return _state.provider.governanceChainId; } function governanceContract() public view returns (bytes32){ return _state.provider.governanceContract; } function messageFee() public view returns (uint256) { return _state.messageFee; } function nextSequence(address emitter) public view returns (uint64) { return _state.sequences[emitter]; } }
// contracts/Governance.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./Structs.sol"; import "./GovernanceStructs.sol"; import "./Messages.sol"; import "./Setters.sol"; import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol"; /** * @dev `Governance` defines a means to enacting changes to the core bridge contract, * guardianSets, message fees, and transfer fees */ abstract contract Governance is GovernanceStructs, Messages, Setters, ERC1967Upgrade { event ContractUpgraded(address indexed oldContract, address indexed newContract); event GuardianSetAdded(uint32 indexed index); // "Core" (left padded) bytes32 constant module = 0x00000000000000000000000000000000000000000000000000000000436f7265; /** * @dev Upgrades a contract via Governance VAA/VM */ function submitContractUpgrade(bytes memory _vm) public { require(!isFork(), "invalid fork"); Structs.VM memory vm = parseVM(_vm); // Verify the VAA is valid before processing it (bool isValid, string memory reason) = verifyGovernanceVM(vm); require(isValid, reason); GovernanceStructs.ContractUpgrade memory upgrade = parseContractUpgrade(vm.payload); // Verify the VAA is for this module require(upgrade.module == module, "Invalid Module"); // Verify the VAA is for this chain require(upgrade.chain == chainId(), "Invalid Chain"); // Record the governance action as consumed setGovernanceActionConsumed(vm.hash); // Upgrades the implementation to the new contract upgradeImplementation(upgrade.newContract); } /** * @dev Sets a `messageFee` via Governance VAA/VM */ function submitSetMessageFee(bytes memory _vm) public { Structs.VM memory vm = parseVM(_vm); // Verify the VAA is valid before processing it (bool isValid, string memory reason) = verifyGovernanceVM(vm); require(isValid, reason); GovernanceStructs.SetMessageFee memory upgrade = parseSetMessageFee(vm.payload); // Verify the VAA is for this module require(upgrade.module == module, "Invalid Module"); // Verify the VAA is for this chain require(upgrade.chain == chainId() && !isFork(), "Invalid Chain"); // Record the governance action as consumed to prevent reentry setGovernanceActionConsumed(vm.hash); // Updates the messageFee setMessageFee(upgrade.messageFee); } /** * @dev Deploys a new `guardianSet` via Governance VAA/VM */ function submitNewGuardianSet(bytes memory _vm) public { Structs.VM memory vm = parseVM(_vm); // Verify the VAA is valid before processing it (bool isValid, string memory reason) = verifyGovernanceVM(vm); require(isValid, reason); GovernanceStructs.GuardianSetUpgrade memory upgrade = parseGuardianSetUpgrade(vm.payload); // Verify the VAA is for this module require(upgrade.module == module, "invalid Module"); // Verify the VAA is for this chain require((upgrade.chain == chainId() && !isFork()) || upgrade.chain == 0, "invalid Chain"); // Verify the Guardian Set keys are not empty, this guards // against the accidential upgrade to an empty GuardianSet require(upgrade.newGuardianSet.keys.length > 0, "new guardian set is empty"); // Verify that the index is incrementing via a predictable +1 pattern require(upgrade.newGuardianSetIndex == getCurrentGuardianSetIndex() + 1, "index must increase in steps of 1"); // Record the governance action as consumed to prevent reentry setGovernanceActionConsumed(vm.hash); // Trigger a time-based expiry of current guardianSet expireGuardianSet(getCurrentGuardianSetIndex()); // Add the new guardianSet to guardianSets storeGuardianSet(upgrade.newGuardianSet, upgrade.newGuardianSetIndex); // Makes the new guardianSet effective updateGuardianSetIndex(upgrade.newGuardianSetIndex); } /** * @dev Submits transfer fees to the recipient via Governance VAA/VM */ function submitTransferFees(bytes memory _vm) public { Structs.VM memory vm = parseVM(_vm); // Verify the VAA is valid before processing it (bool isValid, string memory reason) = verifyGovernanceVM(vm); require(isValid, reason); // Obtains the transfer from the VAA payload GovernanceStructs.TransferFees memory transfer = parseTransferFees(vm.payload); // Verify the VAA is for this module require(transfer.module == module, "invalid Module"); // Verify the VAA is for this chain require((transfer.chain == chainId() && !isFork()) || transfer.chain == 0, "invalid Chain"); // Record the governance action as consumed to prevent reentry setGovernanceActionConsumed(vm.hash); // Obtains the recipient address to be paid transfer fees address payable recipient = payable(address(uint160(uint256(transfer.recipient)))); // Transfers transfer fees to the recipient recipient.transfer(transfer.amount); } /** * @dev Updates the `chainId` and `evmChainId` on a forked chain via Governance VAA/VM */ function submitRecoverChainId(bytes memory _vm) public { require(isFork(), "not a fork"); Structs.VM memory vm = parseVM(_vm); // Verify the VAA is valid before processing it (bool isValid, string memory reason) = verifyGovernanceVM(vm); require(isValid, reason); GovernanceStructs.RecoverChainId memory rci = parseRecoverChainId(vm.payload); // Verify the VAA is for this module require(rci.module == module, "invalid Module"); // Verify the VAA is for this chain require(rci.evmChainId == block.chainid, "invalid EVM Chain"); // Record the governance action as consumed to prevent reentry setGovernanceActionConsumed(vm.hash); // Update the chainIds setEvmChainId(rci.evmChainId); setChainId(rci.newChainId); } /** * @dev Upgrades the `currentImplementation` with a `newImplementation` */ 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); } /** * @dev Verifies a Governance VAA/VM is valid */ function verifyGovernanceVM(Structs.VM memory vm) internal view returns (bool, string memory){ // Verify the VAA is valid (bool isValid, string memory reason) = verifyVM(vm); if (!isValid){ return (false, reason); } // only current guardianset can sign governance packets if (vm.guardianSetIndex != getCurrentGuardianSetIndex()) { return (false, "not signed by current guardian set"); } // Verify the VAA is from the governance chain (Solana) if (uint16(vm.emitterChainId) != governanceChainId()) { return (false, "wrong governance chain"); } // Verify the emitter contract is the governance contract (0x4 left padded) if (vm.emitterAddress != governanceContract()) { return (false, "wrong governance contract"); } // Verify this governance action hasn't already been // consumed to prevent reentry and replay if (governanceActionIsConsumed(vm.hash)){ return (false, "governance action already consumed"); } // Confirm the governance VAA/VM is valid return (true, ""); } }
// contracts/GovernanceStructs.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./libraries/external/BytesLib.sol"; import "./Structs.sol"; /** * @dev `GovernanceStructs` defines a set of structs and parsing functions * for minimal struct validation */ contract GovernanceStructs { using BytesLib for bytes; enum GovernanceAction { UpgradeContract, UpgradeGuardianset } struct ContractUpgrade { bytes32 module; uint8 action; uint16 chain; address newContract; } struct GuardianSetUpgrade { bytes32 module; uint8 action; uint16 chain; Structs.GuardianSet newGuardianSet; uint32 newGuardianSetIndex; } struct SetMessageFee { bytes32 module; uint8 action; uint16 chain; uint256 messageFee; } struct TransferFees { bytes32 module; uint8 action; uint16 chain; uint256 amount; bytes32 recipient; } struct RecoverChainId { bytes32 module; uint8 action; uint256 evmChainId; uint16 newChainId; } /// @dev Parse a contract upgrade (action 1) with minimal validation function parseContractUpgrade(bytes memory encodedUpgrade) public pure returns (ContractUpgrade memory cu) { uint index = 0; cu.module = encodedUpgrade.toBytes32(index); index += 32; cu.action = encodedUpgrade.toUint8(index); index += 1; require(cu.action == 1, "invalid ContractUpgrade"); cu.chain = encodedUpgrade.toUint16(index); index += 2; cu.newContract = address(uint160(uint256(encodedUpgrade.toBytes32(index)))); index += 32; require(encodedUpgrade.length == index, "invalid ContractUpgrade"); } /// @dev Parse a guardianSet upgrade (action 2) with minimal validation function parseGuardianSetUpgrade(bytes memory encodedUpgrade) public pure returns (GuardianSetUpgrade memory gsu) { uint index = 0; gsu.module = encodedUpgrade.toBytes32(index); index += 32; gsu.action = encodedUpgrade.toUint8(index); index += 1; require(gsu.action == 2, "invalid GuardianSetUpgrade"); gsu.chain = encodedUpgrade.toUint16(index); index += 2; gsu.newGuardianSetIndex = encodedUpgrade.toUint32(index); index += 4; uint8 guardianLength = encodedUpgrade.toUint8(index); index += 1; gsu.newGuardianSet = Structs.GuardianSet({ keys : new address[](guardianLength), expirationTime : 0 }); for(uint i = 0; i < guardianLength; i++) { gsu.newGuardianSet.keys[i] = encodedUpgrade.toAddress(index); index += 20; } require(encodedUpgrade.length == index, "invalid GuardianSetUpgrade"); } /// @dev Parse a setMessageFee (action 3) with minimal validation function parseSetMessageFee(bytes memory encodedSetMessageFee) public pure returns (SetMessageFee memory smf) { uint index = 0; smf.module = encodedSetMessageFee.toBytes32(index); index += 32; smf.action = encodedSetMessageFee.toUint8(index); index += 1; require(smf.action == 3, "invalid SetMessageFee"); smf.chain = encodedSetMessageFee.toUint16(index); index += 2; smf.messageFee = encodedSetMessageFee.toUint256(index); index += 32; require(encodedSetMessageFee.length == index, "invalid SetMessageFee"); } /// @dev Parse a transferFees (action 4) with minimal validation function parseTransferFees(bytes memory encodedTransferFees) public pure returns (TransferFees memory tf) { uint index = 0; tf.module = encodedTransferFees.toBytes32(index); index += 32; tf.action = encodedTransferFees.toUint8(index); index += 1; require(tf.action == 4, "invalid TransferFees"); tf.chain = encodedTransferFees.toUint16(index); index += 2; tf.amount = encodedTransferFees.toUint256(index); index += 32; tf.recipient = encodedTransferFees.toBytes32(index); index += 32; require(encodedTransferFees.length == index, "invalid TransferFees"); } /// @dev Parse a recoverChainId (action 5) with minimal validation function parseRecoverChainId(bytes memory encodedRecoverChainId) public pure returns (RecoverChainId memory rci) { uint index = 0; rci.module = encodedRecoverChainId.toBytes32(index); index += 32; rci.action = encodedRecoverChainId.toUint8(index); index += 1; require(rci.action == 5, "invalid RecoverChainId"); rci.evmChainId = encodedRecoverChainId.toUint256(index); index += 32; rci.newChainId = encodedRecoverChainId.toUint16(index); index += 2; require(encodedRecoverChainId.length == index, "invalid RecoverChainId"); } }
// contracts/Messages.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; pragma experimental ABIEncoderV2; import "./Getters.sol"; import "./Structs.sol"; import "./libraries/external/BytesLib.sol"; contract Messages is Getters { using BytesLib for bytes; /// @dev parseAndVerifyVM serves to parse an encodedVM and wholy validate it for consumption function parseAndVerifyVM(bytes calldata encodedVM) public view returns (Structs.VM memory vm, bool valid, string memory reason) { vm = parseVM(encodedVM); (valid, reason) = verifyVM(vm); } /** * @dev `verifyVM` serves to validate an arbitrary vm against a valid Guardian set * - it aims to make sure the VM is for a known guardianSet * - it aims to ensure the guardianSet is not expired * - it aims to ensure the VM has reached quorum * - it aims to verify the signatures provided against the guardianSet */ function verifyVM(Structs.VM memory vm) public view returns (bool valid, string memory reason) { /// @dev Obtain the current guardianSet for the guardianSetIndex provided Structs.GuardianSet memory guardianSet = getGuardianSet(vm.guardianSetIndex); /** * @dev Checks whether the guardianSet has zero keys * WARNING: This keys check is critical to ensure the guardianSet has keys present AND to ensure * that guardianSet key size doesn't fall to zero and negatively impact quorum assessment. If guardianSet * key length is 0 and vm.signatures length is 0, this could compromise the integrity of both vm and * signature verification. */ if(guardianSet.keys.length == 0){ return (false, "invalid guardian set"); } /// @dev Checks if VM guardian set index matches the current index (unless the current set is expired). if(vm.guardianSetIndex != getCurrentGuardianSetIndex() && guardianSet.expirationTime < block.timestamp){ return (false, "guardian set has expired"); } /** * @dev We're using a fixed point number transformation with 1 decimal to deal with rounding. * WARNING: This quorum check is critical to assessing whether we have enough Guardian signatures to validate a VM * if making any changes to this, obtain additional peer review. If guardianSet key length is 0 and * vm.signatures length is 0, this could compromise the integrity of both vm and signature verification. */ if (vm.signatures.length < quorum(guardianSet.keys.length)){ return (false, "no quorum"); } /// @dev Verify the proposed vm.signatures against the guardianSet (bool signaturesValid, string memory invalidReason) = verifySignatures(vm.hash, vm.signatures, guardianSet); if(!signaturesValid){ return (false, invalidReason); } /// If we are here, we've validated the VM is a valid multi-sig that matches the guardianSet. return (true, ""); } /** * @dev verifySignatures serves to validate arbitrary sigatures against an arbitrary guardianSet * - it intentionally does not solve for expectations within guardianSet (you should use verifyVM if you need these protections) * - it intentioanlly does not solve for quorum (you should use verifyVM if you need these protections) * - it intentionally returns true when signatures is an empty set (you should use verifyVM if you need these protections) */ function verifySignatures(bytes32 hash, Structs.Signature[] memory signatures, Structs.GuardianSet memory guardianSet) public pure returns (bool valid, string memory reason) { uint8 lastIndex = 0; uint256 guardianCount = guardianSet.keys.length; for (uint i = 0; i < signatures.length; i++) { Structs.Signature memory sig = signatures[i]; /// Ensure that provided signature indices are ascending only require(i == 0 || sig.guardianIndex > lastIndex, "signature indices must be ascending"); lastIndex = sig.guardianIndex; /// @dev Ensure that the provided signature index is within the /// bounds of the guardianSet. This is implicitly checked by the array /// index operation below, so this check is technically redundant. /// However, reverting explicitly here ensures that a bug is not /// introduced accidentally later due to the nontrivial storage /// semantics of solidity. require(sig.guardianIndex < guardianCount, "guardian index out of bounds"); /// Check to see if the signer of the signature does not match a specific Guardian key at the provided index if(ecrecover(hash, sig.v, sig.r, sig.s) != guardianSet.keys[sig.guardianIndex]){ return (false, "VM signature invalid"); } } /// If we are here, we've validated that the provided signatures are valid for the provided guardianSet return (true, ""); } /** * @dev parseVM serves to parse an encodedVM into a vm struct * - it intentionally performs no validation functions, it simply parses raw into a struct */ function parseVM(bytes memory encodedVM) public pure virtual returns (Structs.VM memory vm) { uint index = 0; vm.version = encodedVM.toUint8(index); index += 1; // SECURITY: Note that currently the VM.version is not part of the hash // and for reasons described below it cannot be made part of the hash. // This means that this field's integrity is not protected and cannot be trusted. // This is not a problem today since there is only one accepted version, but it // could be a problem if we wanted to allow other versions in the future. require(vm.version == 1, "VM version incompatible"); vm.guardianSetIndex = encodedVM.toUint32(index); index += 4; // Parse Signatures uint256 signersLen = encodedVM.toUint8(index); index += 1; vm.signatures = new Structs.Signature[](signersLen); for (uint i = 0; i < signersLen; i++) { vm.signatures[i].guardianIndex = encodedVM.toUint8(index); index += 1; vm.signatures[i].r = encodedVM.toBytes32(index); index += 32; vm.signatures[i].s = encodedVM.toBytes32(index); index += 32; vm.signatures[i].v = encodedVM.toUint8(index) + 27; index += 1; } /* Hash the body SECURITY: Do not change the way the hash of a VM is computed! Changing it could result into two different hashes for the same observation. But xDapps rely on the hash of an observation for replay protection. */ bytes memory body = encodedVM.slice(index, encodedVM.length - index); vm.hash = keccak256(abi.encodePacked(keccak256(body))); // Parse the body vm.timestamp = encodedVM.toUint32(index); index += 4; vm.nonce = encodedVM.toUint32(index); index += 4; vm.emitterChainId = encodedVM.toUint16(index); index += 2; vm.emitterAddress = encodedVM.toBytes32(index); index += 32; vm.sequence = encodedVM.toUint64(index); index += 8; vm.consistencyLevel = encodedVM.toUint8(index); index += 1; vm.payload = encodedVM.slice(index, encodedVM.length - index); } /** * @dev quorum serves solely to determine the number of signatures required to acheive quorum */ function quorum(uint numGuardians) public pure virtual returns (uint numSignaturesRequiredForQuorum) { // The max number of guardians is 255 require(numGuardians < 256, "too many guardians"); return ((numGuardians * 2) / 3) + 1; } }
// contracts/Setters.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./State.sol"; contract Setters is State { function updateGuardianSetIndex(uint32 newIndex) internal { _state.guardianSetIndex = newIndex; } function expireGuardianSet(uint32 index) internal { _state.guardianSets[index].expirationTime = uint32(block.timestamp) + 86400; } function storeGuardianSet(Structs.GuardianSet memory set, uint32 index) internal { _state.guardianSets[index] = set; } function setInitialized(address implementatiom) internal { _state.initializedImplementations[implementatiom] = true; } function setGovernanceActionConsumed(bytes32 hash) internal { _state.consumedGovernanceActions[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 setMessageFee(uint256 newFee) internal { _state.messageFee = newFee; } function setNextSequence(address emitter, uint64 sequence) internal { _state.sequences[emitter] = sequence; } function setEvmChainId(uint256 evmChainId) internal { require(evmChainId == block.chainid, "invalid evmChainId"); _state.evmChainId = evmChainId; } }
// contracts/State.sol // SPDX-License-Identifier: Apache 2 pragma solidity ^0.8.0; import "./Structs.sol"; contract Events { event LogGuardianSetChanged( uint32 oldGuardianIndex, uint32 newGuardianIndex ); event LogMessagePublished( address emitter_address, uint32 nonce, bytes payload ); } contract Storage { struct WormholeState { Structs.Provider provider; // Mapping of guardian_set_index => guardian set mapping(uint32 => Structs.GuardianSet) guardianSets; // Current active guardian set index uint32 guardianSetIndex; // Period for which a guardian set stays active after it has been replaced uint32 guardianSetExpiry; // Sequence numbers per emitter mapping(address => uint64) sequences; // Mapping of consumed governance actions mapping(bytes32 => bool) consumedGovernanceActions; // Mapping of initialized implementations mapping(address => bool) initializedImplementations; uint256 messageFee; // EIP-155 Chain ID uint256 evmChainId; } } contract State { Storage.WormholeState _state; }
// 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; } }
// 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; } }
{ "remappings": [], "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "istanbul", "libraries": {}, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "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":"oldContract","type":"address"},{"indexed":true,"internalType":"address","name":"newContract","type":"address"}],"name":"ContractUpgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint32","name":"index","type":"uint32"}],"name":"GuardianSetAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint64","name":"sequence","type":"uint64"},{"indexed":false,"internalType":"uint32","name":"nonce","type":"uint32"},{"indexed":false,"internalType":"bytes","name":"payload","type":"bytes"},{"indexed":false,"internalType":"uint8","name":"consistencyLevel","type":"uint8"}],"name":"LogMessagePublished","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"chainId","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"evmChainId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentGuardianSetIndex","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"index","type":"uint32"}],"name":"getGuardianSet","outputs":[{"components":[{"internalType":"address[]","name":"keys","type":"address[]"},{"internalType":"uint32","name":"expirationTime","type":"uint32"}],"internalType":"struct Structs.GuardianSet","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getGuardianSetExpiry","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"hash","type":"bytes32"}],"name":"governanceActionIsConsumed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"governanceChainId","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"governanceContract","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isFork","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"impl","type":"address"}],"name":"isInitialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"messageFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"emitter","type":"address"}],"name":"nextSequence","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"encodedVM","type":"bytes"}],"name":"parseAndVerifyVM","outputs":[{"components":[{"internalType":"uint8","name":"version","type":"uint8"},{"internalType":"uint32","name":"timestamp","type":"uint32"},{"internalType":"uint32","name":"nonce","type":"uint32"},{"internalType":"uint16","name":"emitterChainId","type":"uint16"},{"internalType":"bytes32","name":"emitterAddress","type":"bytes32"},{"internalType":"uint64","name":"sequence","type":"uint64"},{"internalType":"uint8","name":"consistencyLevel","type":"uint8"},{"internalType":"bytes","name":"payload","type":"bytes"},{"internalType":"uint32","name":"guardianSetIndex","type":"uint32"},{"components":[{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"uint8","name":"guardianIndex","type":"uint8"}],"internalType":"struct Structs.Signature[]","name":"signatures","type":"tuple[]"},{"internalType":"bytes32","name":"hash","type":"bytes32"}],"internalType":"struct Structs.VM","name":"vm","type":"tuple"},{"internalType":"bool","name":"valid","type":"bool"},{"internalType":"string","name":"reason","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"encodedUpgrade","type":"bytes"}],"name":"parseContractUpgrade","outputs":[{"components":[{"internalType":"bytes32","name":"module","type":"bytes32"},{"internalType":"uint8","name":"action","type":"uint8"},{"internalType":"uint16","name":"chain","type":"uint16"},{"internalType":"address","name":"newContract","type":"address"}],"internalType":"struct GovernanceStructs.ContractUpgrade","name":"cu","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"encodedUpgrade","type":"bytes"}],"name":"parseGuardianSetUpgrade","outputs":[{"components":[{"internalType":"bytes32","name":"module","type":"bytes32"},{"internalType":"uint8","name":"action","type":"uint8"},{"internalType":"uint16","name":"chain","type":"uint16"},{"components":[{"internalType":"address[]","name":"keys","type":"address[]"},{"internalType":"uint32","name":"expirationTime","type":"uint32"}],"internalType":"struct Structs.GuardianSet","name":"newGuardianSet","type":"tuple"},{"internalType":"uint32","name":"newGuardianSetIndex","type":"uint32"}],"internalType":"struct GovernanceStructs.GuardianSetUpgrade","name":"gsu","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"encodedRecoverChainId","type":"bytes"}],"name":"parseRecoverChainId","outputs":[{"components":[{"internalType":"bytes32","name":"module","type":"bytes32"},{"internalType":"uint8","name":"action","type":"uint8"},{"internalType":"uint256","name":"evmChainId","type":"uint256"},{"internalType":"uint16","name":"newChainId","type":"uint16"}],"internalType":"struct GovernanceStructs.RecoverChainId","name":"rci","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"encodedSetMessageFee","type":"bytes"}],"name":"parseSetMessageFee","outputs":[{"components":[{"internalType":"bytes32","name":"module","type":"bytes32"},{"internalType":"uint8","name":"action","type":"uint8"},{"internalType":"uint16","name":"chain","type":"uint16"},{"internalType":"uint256","name":"messageFee","type":"uint256"}],"internalType":"struct GovernanceStructs.SetMessageFee","name":"smf","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"encodedTransferFees","type":"bytes"}],"name":"parseTransferFees","outputs":[{"components":[{"internalType":"bytes32","name":"module","type":"bytes32"},{"internalType":"uint8","name":"action","type":"uint8"},{"internalType":"uint16","name":"chain","type":"uint16"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes32","name":"recipient","type":"bytes32"}],"internalType":"struct GovernanceStructs.TransferFees","name":"tf","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"encodedVM","type":"bytes"}],"name":"parseVM","outputs":[{"components":[{"internalType":"uint8","name":"version","type":"uint8"},{"internalType":"uint32","name":"timestamp","type":"uint32"},{"internalType":"uint32","name":"nonce","type":"uint32"},{"internalType":"uint16","name":"emitterChainId","type":"uint16"},{"internalType":"bytes32","name":"emitterAddress","type":"bytes32"},{"internalType":"uint64","name":"sequence","type":"uint64"},{"internalType":"uint8","name":"consistencyLevel","type":"uint8"},{"internalType":"bytes","name":"payload","type":"bytes"},{"internalType":"uint32","name":"guardianSetIndex","type":"uint32"},{"components":[{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"uint8","name":"guardianIndex","type":"uint8"}],"internalType":"struct Structs.Signature[]","name":"signatures","type":"tuple[]"},{"internalType":"bytes32","name":"hash","type":"bytes32"}],"internalType":"struct Structs.VM","name":"vm","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint32","name":"nonce","type":"uint32"},{"internalType":"bytes","name":"payload","type":"bytes"},{"internalType":"uint8","name":"consistencyLevel","type":"uint8"}],"name":"publishMessage","outputs":[{"internalType":"uint64","name":"sequence","type":"uint64"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"numGuardians","type":"uint256"}],"name":"quorum","outputs":[{"internalType":"uint256","name":"numSignaturesRequiredForQuorum","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"_vm","type":"bytes"}],"name":"submitContractUpgrade","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"_vm","type":"bytes"}],"name":"submitNewGuardianSet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"_vm","type":"bytes"}],"name":"submitRecoverChainId","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"_vm","type":"bytes"}],"name":"submitSetMessageFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"_vm","type":"bytes"}],"name":"submitTransferFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"hash","type":"bytes32"},{"components":[{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"uint8","name":"guardianIndex","type":"uint8"}],"internalType":"struct Structs.Signature[]","name":"signatures","type":"tuple[]"},{"components":[{"internalType":"address[]","name":"keys","type":"address[]"},{"internalType":"uint32","name":"expirationTime","type":"uint32"}],"internalType":"struct Structs.GuardianSet","name":"guardianSet","type":"tuple"}],"name":"verifySignatures","outputs":[{"internalType":"bool","name":"valid","type":"bool"},{"internalType":"string","name":"reason","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[{"components":[{"internalType":"uint8","name":"version","type":"uint8"},{"internalType":"uint32","name":"timestamp","type":"uint32"},{"internalType":"uint32","name":"nonce","type":"uint32"},{"internalType":"uint16","name":"emitterChainId","type":"uint16"},{"internalType":"bytes32","name":"emitterAddress","type":"bytes32"},{"internalType":"uint64","name":"sequence","type":"uint64"},{"internalType":"uint8","name":"consistencyLevel","type":"uint8"},{"internalType":"bytes","name":"payload","type":"bytes"},{"internalType":"uint32","name":"guardianSetIndex","type":"uint32"},{"components":[{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"uint8","name":"guardianIndex","type":"uint8"}],"internalType":"struct Structs.Signature[]","name":"signatures","type":"tuple[]"},{"internalType":"bytes32","name":"hash","type":"bytes32"}],"internalType":"struct Structs.VM","name":"vm","type":"tuple"}],"name":"verifyVM","outputs":[{"internalType":"bool","name":"valid","type":"bool"},{"internalType":"string","name":"reason","type":"string"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.