Source Code
Latest 25 from a total of 32,354 transactions
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| Aggregate3 | 362461974 | 180 days ago | IN | 0 ETH | 0.00001767 | ||||
| Aggregate3Value | 346420800 | 227 days ago | IN | 0 ETH | 0.0001428 | ||||
| Aggregate3Value | 346420578 | 227 days ago | IN | 0 ETH | 0.00008428 | ||||
| Aggregate3Value | 346418997 | 227 days ago | IN | 93 wei | 0.00005521 | ||||
| Aggregate3Value | 346418126 | 227 days ago | IN | 96 wei | 0.0000517 | ||||
| Aggregate3Value | 346187307 | 227 days ago | IN | 1 wei | 0.00000609 | ||||
| Aggregate3Value | 346186559 | 227 days ago | IN | 1 wei | 0.00006882 | ||||
| Aggregate3Value | 346181531 | 227 days ago | IN | 1 wei | 0.00000877 | ||||
| Aggregate3Value | 344860652 | 231 days ago | IN | 91 wei | 0.00003596 | ||||
| Aggregate3Value | 343727673 | 235 days ago | IN | 90 wei | 0.00003286 | ||||
| Aggregate3Value | 343059555 | 237 days ago | IN | 92 wei | 0.00020347 | ||||
| Aggregate3Value | 342102583 | 239 days ago | IN | 93 wei | 0.00008273 | ||||
| Aggregate3Value | 341954678 | 240 days ago | IN | 0 ETH | 0.00016872 | ||||
| Aggregate3Value | 341953926 | 240 days ago | IN | 90 wei | 0.00010423 | ||||
| Aggregate3Value | 341782923 | 240 days ago | IN | 91 wei | 0.00038635 | ||||
| Aggregate3Value | 341706360 | 240 days ago | IN | 0 ETH | 0.00000108 | ||||
| Aggregate3Value | 341706314 | 240 days ago | IN | 0 ETH | 0.00000111 | ||||
| Aggregate3Value | 341706274 | 240 days ago | IN | 90 wei | 0.0000402 | ||||
| Aggregate3Value | 341504437 | 241 days ago | IN | 0 ETH | 0.000001 | ||||
| Aggregate3Value | 341503102 | 241 days ago | IN | 92 wei | 0.0000613 | ||||
| Aggregate3Value | 341181675 | 242 days ago | IN | 86 wei | 0.00012759 | ||||
| Aggregate3Value | 341111531 | 242 days ago | IN | 0 ETH | 0.00040442 | ||||
| Aggregate3Value | 341110389 | 242 days ago | IN | 3 wei | 0.00015243 | ||||
| Aggregate3Value | 341110333 | 242 days ago | IN | 0 ETH | 0.00061234 | ||||
| Aggregate3Value | 341109401 | 242 days ago | IN | 0 ETH | 0.00049439 |
Latest 25 internal transactions (View All)
| Parent Transaction Hash | Block | From | To | |||
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| 346418997 | 227 days ago | 92 wei | ||||
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| 346187307 | 227 days ago | 1 wei | ||||
| 346186559 | 227 days ago | 1 wei | ||||
| 346181531 | 227 days ago | 1 wei | ||||
| 344860652 | 231 days ago | 91 wei | ||||
| 343727673 | 235 days ago | 90 wei | ||||
| 343059555 | 237 days ago | 92 wei | ||||
| 342102583 | 239 days ago | 92 wei | ||||
| 342102583 | 239 days ago | 1 wei | ||||
| 341953926 | 240 days ago | 90 wei | ||||
| 341782923 | 240 days ago | 87 wei | ||||
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| 341706274 | 240 days ago | 90 wei | ||||
| 341503102 | 241 days ago | 92 wei | ||||
| 341181675 | 242 days ago | 1 wei | ||||
| 341181675 | 242 days ago | 1 wei |
Cross-Chain Transactions
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Contract Name:
TrustedMulticallForwarder
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 1000000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
import {ERC2771Forwarder, Address} from "../lib/openzeppelin-contracts/contracts/metatx/ERC2771Forwarder.sol";
/* solhint-disable meta-transactions/no-msg-sender */
/// @title TrustedMulticallForwarder
/// @notice Aggregate results from multiple function calls
/// @dev Derived from Multicall3
/// @dev Modified for support to bubble errors
/// @dev Multicall & Multicall2 backwards-compatible
/// @dev Aggregate methods are marked `payable` to save 24 gas per call
/// @dev Includes ERC-2771 trusted forwarder functionality
/// @author Michael Elliot <[email protected]>
/// @author Joshua Levine <[email protected]>
/// @author Nick Johnson <[email protected]>
/// @author Andreas Bigger <[email protected]>
/// @author Matt Solomon <[email protected]>
/// @author Daniel Beal <[email protected]>
/// @author Noah Litvin <[email protected]>
/// @author Jared Borders <[email protected]>
contract TrustedMulticallForwarder is ERC2771Forwarder {
struct Call {
address target;
bytes callData;
}
struct Call3 {
address target;
bool requireSuccess;
bytes callData;
}
struct Call3Value {
address target;
bool requireSuccess;
uint256 value;
bytes callData;
}
struct Result {
bool success;
bytes returnData;
}
constructor() ERC2771Forwarder("trusted-multicall-forwarder") {}
/// @notice Backwards-compatible call aggregation with Multicall
/// @param calls An array of Call structs
/// @return blockNumber The block number where the calls were executed
/// @return returnData An array of bytes containing the responses
function aggregate(
Call[] calldata calls
) public returns (uint256 blockNumber, bytes[] memory returnData) {
blockNumber = block.number;
uint256 length = calls.length;
returnData = new bytes[](length);
Call calldata call;
for (uint256 i = 0; i < length; ) {
bool success;
call = calls[i];
(success, returnData[i]) = call.target.call(
abi.encodePacked(call.callData, msg.sender)
);
if (!success) {
bytes memory revertData = returnData[i];
uint256 len = revertData.length;
assembly {
revert(add(revertData, 0x20), len)
}
}
unchecked {
++i;
}
}
}
/// @notice Backwards-compatible with Multicall2
/// @notice Aggregate calls without requiring success
/// @param requireSuccess If true, require all calls to succeed
/// @param calls An array of Call structs
/// @return returnData An array of Result structs
function tryAggregate(
bool requireSuccess,
Call[] calldata calls
) public returns (Result[] memory returnData) {
uint256 length = calls.length;
returnData = new Result[](length);
Call calldata call;
for (uint256 i = 0; i < length; ) {
Result memory result = returnData[i];
call = calls[i];
(result.success, result.returnData) = call.target.call(
abi.encodePacked(call.callData, msg.sender)
);
if (requireSuccess && !result.success) {
bytes memory revertData = result.returnData;
uint256 len = revertData.length;
assembly {
revert(add(revertData, 0x20), len)
}
}
unchecked {
++i;
}
}
}
/// @notice Backwards-compatible with Multicall2
/// @notice Aggregate calls and allow failures using tryAggregate
/// @param calls An array of Call structs
/// @return blockNumber The block number where the calls were executed
/// @return blockHash The hash of the block where the calls were executed
/// @return returnData An array of Result structs
function tryBlockAndAggregate(
bool requireSuccess,
Call[] calldata calls
) public payable returns (uint256 blockNumber, bytes32 blockHash, Result[] memory returnData) {
blockNumber = block.number;
blockHash = blockhash(block.number);
returnData = tryAggregate(requireSuccess, calls);
}
/// @notice Backwards-compatible with Multicall2
/// @notice Aggregate calls and allow failures using tryAggregate
/// @param calls An array of Call structs
/// @return blockNumber The block number where the calls were executed
/// @return blockHash The hash of the block where the calls were executed
/// @return returnData An array of Result structs
function blockAndAggregate(
Call[] calldata calls
) public payable returns (uint256 blockNumber, bytes32 blockHash, Result[] memory returnData) {
(blockNumber, blockHash, returnData) = tryBlockAndAggregate(true, calls);
}
/// @notice Aggregate calls, ensuring each returns success if required
/// @param calls An array of Call3 structs
/// @return returnData An array of Result structs
function aggregate3(
Call3[] calldata calls
) public payable returns (Result[] memory returnData) {
uint256 length = calls.length;
returnData = new Result[](length);
Call3 calldata calli;
for (uint256 i = 0; i < length; ) {
Result memory result = returnData[i];
calli = calls[i];
(result.success, result.returnData) = calli.target.call(
abi.encodePacked(calli.callData, msg.sender)
);
if (calli.requireSuccess && !result.success) {
bytes memory revertData = result.returnData;
uint256 len = revertData.length;
assembly {
revert(add(revertData, 0x20), len)
}
}
unchecked {
++i;
}
}
}
/// @notice Aggregate calls with a msg value
/// @notice Reverts if msg.value is less than the sum of the call values
/// @param calls An array of Call3Value structs
/// @return returnData An array of Result structs
function aggregate3Value(
Call3Value[] calldata calls
) public payable returns (Result[] memory returnData) {
uint256 valAccumulator;
uint256 length = calls.length;
returnData = new Result[](length);
Call3Value calldata calli;
for (uint256 i = 0; i < length; ) {
Result memory result = returnData[i];
calli = calls[i];
uint256 val = calli.value;
// Humanity will be a Type V Kardashev Civilization before this overflows - andreas
// ~ 10^25 Wei in existence << ~ 10^76 size uint fits in a uint256
unchecked {
valAccumulator += val;
}
(result.success, result.returnData) = calli.target.call{value: val}(
abi.encodePacked(calli.callData, msg.sender)
);
if (calli.requireSuccess && !result.success) {
bytes memory revertData = result.returnData;
uint256 len = revertData.length;
assembly {
revert(add(revertData, 0x20), len)
}
}
unchecked {
++i;
}
}
// Finally, make sure the msg.value == SUM(call[0...i].value)
if (msg.value != valAccumulator) {
revert ERC2771ForwarderMismatchedValue(valAccumulator, msg.value);
}
}
/// @notice Aggregate ForwardRequestData objects
/// @notice Reverts if msg.value does not equal the sum of the call values
/// @notice Reverts if the msg.sender is the zero address
/// @param requests An array of ForwardRequestData structs
/// @return returnData An array of Result structs
function executeBatch(
ForwardRequestData[] calldata requests
) public payable returns (Result[] memory returnData) {
uint256 length = requests.length;
returnData = new Result[](length);
ForwardRequestData calldata req;
uint256 requestsValue;
uint256 refundValue;
for (uint256 i; i < length; ) {
Result memory result = returnData[i];
req = requests[i];
requestsValue += requests[i].value;
(bool isTrustedForwarder, bool active, bool signerMatch, address signer) = _validate(
req
);
if (isTrustedForwarder && signerMatch && active) {
// Nonce should be used before the call to prevent reusing by reentrancy
uint256 currentNonce = _useNonce(signer);
(result.success, result.returnData) = req.to.call{value: req.value, gas: req.gas}(
abi.encodePacked(req.data, req.from)
);
/// @dev see ERC2771Forwarder._checkForwardedGas() for further details
if (gasleft() < req.gas / 63) {
assembly {
invalid()
}
}
emit ExecutedForwardRequest(signer, currentNonce, result.success);
}
/// @notice If the call was not successful, we refund the value to the msg.sender
/// @dev unsuccessful calls are never reverted
if (!result.success) {
refundValue += requests[i].value;
}
unchecked {
++i;
}
}
// The batch should revert if there's a mismatched msg.value provided
// to avoid request value tampering
if (requestsValue != msg.value) {
revert ERC2771ForwarderMismatchedValue(requestsValue, msg.value);
}
// Some requests with value were invalid (possibly due to frontrunning).
// To avoid leaving ETH in the contract this value is refunded.
if (refundValue != 0) {
// We know msg.sender != address(0) && requestsValue == msg.value
// meaning we can ensure refundValue is not taken from the original contract's balance
// and msg.sender is a known account.
Address.sendValue(payable(msg.sender), refundValue);
}
}
/// @notice Returns the block hash for the given block number
/// @param blockNumber The block number
function getBlockHash(uint256 blockNumber) public view returns (bytes32 blockHash) {
blockHash = blockhash(blockNumber);
}
/// @notice Returns the block number
function getBlockNumber() public view returns (uint256 blockNumber) {
blockNumber = block.number;
}
/// @notice Returns the block coinbase
function getCurrentBlockCoinbase() public view returns (address coinbase) {
coinbase = block.coinbase;
}
/// @notice Returns the block prevrandao
function getPrevRandao() public view returns (uint256 prevrandao) {
prevrandao = block.prevrandao;
}
/// @notice Returns the block gas limit
function getCurrentBlockGasLimit() public view returns (uint256 gaslimit) {
gaslimit = block.gaslimit;
}
/// @notice Returns the block timestamp
function getCurrentBlockTimestamp() public view returns (uint256 timestamp) {
timestamp = block.timestamp;
}
/// @notice Returns the (ETH) balance of a given address
function getEthBalance(address addr) public view returns (uint256 balance) {
balance = addr.balance;
}
/// @notice Returns the block hash of the last block
function getLastBlockHash() public view returns (bytes32 blockHash) {
unchecked {
blockHash = blockhash(block.number - 1);
}
}
/// @notice Gets the base fee of the given block
/// @notice Can revert if the BASEFEE opcode is not implemented by the given chain
function getBasefee() public view returns (uint256 basefee) {
basefee = block.basefee;
}
/// @notice Returns the chain id
function getChainId() public view returns (uint256 chainid) {
chainid = block.chainid;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol)
pragma solidity ^0.8.20;
interface IERC5267 {
/**
* @dev MAY be emitted to signal that the domain could have changed.
*/
event EIP712DomainChanged();
/**
* @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
* signature.
*/
function eip712Domain()
external
view
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (metatx/ERC2771Context.sol)
pragma solidity ^0.8.20;
import {Context} from "../utils/Context.sol";
/**
* @dev Context variant with ERC2771 support.
*
* WARNING: Avoid using this pattern in contracts that rely in a specific calldata length as they'll
* be affected by any forwarder whose `msg.data` is suffixed with the `from` address according to the ERC2771
* specification adding the address size in bytes (20) to the calldata size. An example of an unexpected
* behavior could be an unintended fallback (or another function) invocation while trying to invoke the `receive`
* function only accessible if `msg.data.length == 0`.
*/
abstract contract ERC2771Context is Context {
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable
address private immutable _trustedForwarder;
/**
* @dev Initializes the contract with a trusted forwarder, which will be able to
* invoke functions on this contract on behalf of other accounts.
*
* NOTE: The trusted forwarder can be replaced by overriding {trustedForwarder}.
*/
/// @custom:oz-upgrades-unsafe-allow constructor
constructor(address trustedForwarder_) {
_trustedForwarder = trustedForwarder_;
}
/**
* @dev Returns the address of the trusted forwarder.
*/
function trustedForwarder() public view virtual returns (address) {
return _trustedForwarder;
}
/**
* @dev Indicates whether any particular address is the trusted forwarder.
*/
function isTrustedForwarder(address forwarder) public view virtual returns (bool) {
return forwarder == trustedForwarder();
}
/**
* @dev Override for `msg.sender`. Defaults to the original `msg.sender` whenever
* a call is not performed by the trusted forwarder or the calldata length is less than
* 20 bytes (an address length).
*/
function _msgSender() internal view virtual override returns (address sender) {
if (isTrustedForwarder(msg.sender) && msg.data.length >= 20) {
// The assembly code is more direct than the Solidity version using `abi.decode`.
/// @solidity memory-safe-assembly
assembly {
sender := shr(96, calldataload(sub(calldatasize(), 20)))
}
} else {
return super._msgSender();
}
}
/**
* @dev Override for `msg.data`. Defaults to the original `msg.data` whenever
* a call is not performed by the trusted forwarder or the calldata length is less than
* 20 bytes (an address length).
*/
function _msgData() internal view virtual override returns (bytes calldata) {
if (isTrustedForwarder(msg.sender) && msg.data.length >= 20) {
return msg.data[:msg.data.length - 20];
} else {
return super._msgData();
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (metatx/ERC2771Forwarder.sol)
pragma solidity ^0.8.20;
import {ERC2771Context} from "./ERC2771Context.sol";
import {ECDSA} from "../utils/cryptography/ECDSA.sol";
import {EIP712} from "../utils/cryptography/EIP712.sol";
import {Nonces} from "../utils/Nonces.sol";
import {Address} from "../utils/Address.sol";
/**
* @dev A forwarder compatible with ERC2771 contracts. See {ERC2771Context}.
*
* This forwarder operates on forward requests that include:
*
* * `from`: An address to operate on behalf of. It is required to be equal to the request signer.
* * `to`: The address that should be called.
* * `value`: The amount of native token to attach with the requested call.
* * `gas`: The amount of gas limit that will be forwarded with the requested call.
* * `nonce`: A unique transaction ordering identifier to avoid replayability and request invalidation.
* * `deadline`: A timestamp after which the request is not executable anymore.
* * `data`: Encoded `msg.data` to send with the requested call.
*
* Relayers are able to submit batches if they are processing a high volume of requests. With high
* throughput, relayers may run into limitations of the chain such as limits on the number of
* transactions in the mempool. In these cases the recommendation is to distribute the load among
* multiple accounts.
*
* NOTE: Batching requests includes an optional refund for unused `msg.value` that is achieved by
* performing a call with empty calldata. While this is within the bounds of ERC-2771 compliance,
* if the refund receiver happens to consider the forwarder a trusted forwarder, it MUST properly
* handle `msg.data.length == 0`. `ERC2771Context` in OpenZeppelin Contracts versions prior to 4.9.3
* do not handle this properly.
*
* ==== Security Considerations
*
* If a relayer submits a forward request, it should be willing to pay up to 100% of the gas amount
* specified in the request. This contract does not implement any kind of retribution for this gas,
* and it is assumed that there is an out of band incentive for relayers to pay for execution on
* behalf of signers. Often, the relayer is operated by a project that will consider it a user
* acquisition cost.
*
* By offering to pay for gas, relayers are at risk of having that gas used by an attacker toward
* some other purpose that is not aligned with the expected out of band incentives. If you operate a
* relayer, consider whitelisting target contracts and function selectors. When relaying ERC-721 or
* ERC-1155 transfers specifically, consider rejecting the use of the `data` field, since it can be
* used to execute arbitrary code.
*/
contract ERC2771Forwarder is EIP712, Nonces {
using ECDSA for bytes32;
struct ForwardRequestData {
address from;
address to;
uint256 value;
uint256 gas;
uint48 deadline;
bytes data;
bytes signature;
}
bytes32 internal constant _FORWARD_REQUEST_TYPEHASH =
keccak256(
"ForwardRequest(address from,address to,uint256 value,uint256 gas,uint256 nonce,uint48 deadline,bytes data)"
);
/**
* @dev Emitted when a `ForwardRequest` is executed.
*
* NOTE: An unsuccessful forward request could be due to an invalid signature, an expired deadline,
* or simply a revert in the requested call. The contract guarantees that the relayer is not able to force
* the requested call to run out of gas.
*/
event ExecutedForwardRequest(address indexed signer, uint256 nonce, bool success);
/**
* @dev The request `from` doesn't match with the recovered `signer`.
*/
error ERC2771ForwarderInvalidSigner(address signer, address from);
/**
* @dev The `requestedValue` doesn't match with the available `msgValue`.
*/
error ERC2771ForwarderMismatchedValue(uint256 requestedValue, uint256 msgValue);
/**
* @dev The request `deadline` has expired.
*/
error ERC2771ForwarderExpiredRequest(uint48 deadline);
/**
* @dev The request target doesn't trust the `forwarder`.
*/
error ERC2771UntrustfulTarget(address target, address forwarder);
/**
* @dev See {EIP712-constructor}.
*/
constructor(string memory name) EIP712(name, "1") {}
/**
* @dev Returns `true` if a request is valid for a provided `signature` at the current block timestamp.
*
* A transaction is considered valid when the target trusts this forwarder, the request hasn't expired
* (deadline is not met), and the signer matches the `from` parameter of the signed request.
*
* NOTE: A request may return false here but it won't cause {executeBatch} to revert if a refund
* receiver is provided.
*/
function verify(ForwardRequestData calldata request) public view virtual returns (bool) {
(bool isTrustedForwarder, bool active, bool signerMatch, ) = _validate(request);
return isTrustedForwarder && active && signerMatch;
}
/**
* @dev Executes a `request` on behalf of `signature`'s signer using the ERC-2771 protocol. The gas
* provided to the requested call may not be exactly the amount requested, but the call will not run
* out of gas. Will revert if the request is invalid or the call reverts, in this case the nonce is not consumed.
*
* Requirements:
*
* - The request value should be equal to the provided `msg.value`.
* - The request should be valid according to {verify}.
*/
function execute(ForwardRequestData calldata request) public payable virtual {
// We make sure that msg.value and request.value match exactly.
// If the request is invalid or the call reverts, this whole function
// will revert, ensuring value isn't stuck.
if (msg.value != request.value) {
revert ERC2771ForwarderMismatchedValue(request.value, msg.value);
}
if (!_execute(request, true)) {
revert Address.FailedInnerCall();
}
}
/**
* @dev Batch version of {execute} with optional refunding and atomic execution.
*
* In case a batch contains at least one invalid request (see {verify}), the
* request will be skipped and the `refundReceiver` parameter will receive back the
* unused requested value at the end of the execution. This is done to prevent reverting
* the entire batch when a request is invalid or has already been submitted.
*
* If the `refundReceiver` is the `address(0)`, this function will revert when at least
* one of the requests was not valid instead of skipping it. This could be useful if
* a batch is required to get executed atomically (at least at the top-level). For example,
* refunding (and thus atomicity) can be opt-out if the relayer is using a service that avoids
* including reverted transactions.
*
* Requirements:
*
* - The sum of the requests' values should be equal to the provided `msg.value`.
* - All of the requests should be valid (see {verify}) when `refundReceiver` is the zero address.
*
* NOTE: Setting a zero `refundReceiver` guarantees an all-or-nothing requests execution only for
* the first-level forwarded calls. In case a forwarded request calls to a contract with another
* subcall, the second-level call may revert without the top-level call reverting.
*/
function executeBatch(
ForwardRequestData[] calldata requests,
address payable refundReceiver
) public payable virtual {
bool atomic = refundReceiver == address(0);
uint256 requestsValue;
uint256 refundValue;
for (uint256 i; i < requests.length; ++i) {
requestsValue += requests[i].value;
bool success = _execute(requests[i], atomic);
if (!success) {
refundValue += requests[i].value;
}
}
// The batch should revert if there's a mismatched msg.value provided
// to avoid request value tampering
if (requestsValue != msg.value) {
revert ERC2771ForwarderMismatchedValue(requestsValue, msg.value);
}
// Some requests with value were invalid (possibly due to frontrunning).
// To avoid leaving ETH in the contract this value is refunded.
if (refundValue != 0) {
// We know refundReceiver != address(0) && requestsValue == msg.value
// meaning we can ensure refundValue is not taken from the original contract's balance
// and refundReceiver is a known account.
Address.sendValue(refundReceiver, refundValue);
}
}
/**
* @dev Validates if the provided request can be executed at current block timestamp with
* the given `request.signature` on behalf of `request.signer`.
*/
function _validate(
ForwardRequestData calldata request
) internal view virtual returns (bool isTrustedForwarder, bool active, bool signerMatch, address signer) {
(bool isValid, address recovered) = _recoverForwardRequestSigner(request);
return (
_isTrustedByTarget(request.to),
request.deadline >= block.timestamp,
isValid && recovered == request.from,
recovered
);
}
/**
* @dev Returns a tuple with the recovered the signer of an EIP712 forward request message hash
* and a boolean indicating if the signature is valid.
*
* NOTE: The signature is considered valid if {ECDSA-tryRecover} indicates no recover error for it.
*/
function _recoverForwardRequestSigner(
ForwardRequestData calldata request
) internal view virtual returns (bool, address) {
(address recovered, ECDSA.RecoverError err, ) = _hashTypedDataV4(
keccak256(
abi.encode(
_FORWARD_REQUEST_TYPEHASH,
request.from,
request.to,
request.value,
request.gas,
nonces(request.from),
request.deadline,
keccak256(request.data)
)
)
).tryRecover(request.signature);
return (err == ECDSA.RecoverError.NoError, recovered);
}
/**
* @dev Validates and executes a signed request returning the request call `success` value.
*
* Internal function without msg.value validation.
*
* Requirements:
*
* - The caller must have provided enough gas to forward with the call.
* - The request must be valid (see {verify}) if the `requireValidRequest` is true.
*
* Emits an {ExecutedForwardRequest} event.
*
* IMPORTANT: Using this function doesn't check that all the `msg.value` was sent, potentially
* leaving value stuck in the contract.
*/
function _execute(
ForwardRequestData calldata request,
bool requireValidRequest
) internal virtual returns (bool success) {
(bool isTrustedForwarder, bool active, bool signerMatch, address signer) = _validate(request);
// Need to explicitly specify if a revert is required since non-reverting is default for
// batches and reversion is opt-in since it could be useful in some scenarios
if (requireValidRequest) {
if (!isTrustedForwarder) {
revert ERC2771UntrustfulTarget(request.to, address(this));
}
if (!active) {
revert ERC2771ForwarderExpiredRequest(request.deadline);
}
if (!signerMatch) {
revert ERC2771ForwarderInvalidSigner(signer, request.from);
}
}
// Ignore an invalid request because requireValidRequest = false
if (isTrustedForwarder && signerMatch && active) {
// Nonce should be used before the call to prevent reusing by reentrancy
uint256 currentNonce = _useNonce(signer);
uint256 reqGas = request.gas;
address to = request.to;
uint256 value = request.value;
bytes memory data = abi.encodePacked(request.data, request.from);
uint256 gasLeft;
assembly {
success := call(reqGas, to, value, add(data, 0x20), mload(data), 0, 0)
gasLeft := gas()
}
_checkForwardedGas(gasLeft, request);
emit ExecutedForwardRequest(signer, currentNonce, success);
}
}
/**
* @dev Returns whether the target trusts this forwarder.
*
* This function performs a static call to the target contract calling the
* {ERC2771Context-isTrustedForwarder} function.
*/
function _isTrustedByTarget(address target) private view returns (bool) {
bytes memory encodedParams = abi.encodeCall(ERC2771Context.isTrustedForwarder, (address(this)));
bool success;
uint256 returnSize;
uint256 returnValue;
/// @solidity memory-safe-assembly
assembly {
// Perform the staticcal and save the result in the scratch space.
// | Location | Content | Content (Hex) |
// |-----------|----------|--------------------------------------------------------------------|
// | | | result ↓ |
// | 0x00:0x1F | selector | 0x0000000000000000000000000000000000000000000000000000000000000001 |
success := staticcall(gas(), target, add(encodedParams, 0x20), mload(encodedParams), 0, 0x20)
returnSize := returndatasize()
returnValue := mload(0)
}
return success && returnSize >= 0x20 && returnValue > 0;
}
/**
* @dev Checks if the requested gas was correctly forwarded to the callee.
*
* As a consequence of https://eips.ethereum.org/EIPS/eip-150[EIP-150]:
* - At most `gasleft() - floor(gasleft() / 64)` is forwarded to the callee.
* - At least `floor(gasleft() / 64)` is kept in the caller.
*
* It reverts consuming all the available gas if the forwarded gas is not the requested gas.
*
* IMPORTANT: The `gasLeft` parameter should be measured exactly at the end of the forwarded call.
* Any gas consumed in between will make room for bypassing this check.
*/
function _checkForwardedGas(uint256 gasLeft, ForwardRequestData calldata request) private pure {
// To avoid insufficient gas griefing attacks, as referenced in https://ronan.eth.limo/blog/ethereum-gas-dangers/
//
// A malicious relayer can attempt to shrink the gas forwarded so that the underlying call reverts out-of-gas
// but the forwarding itself still succeeds. In order to make sure that the subcall received sufficient gas,
// we will inspect gasleft() after the forwarding.
//
// Let X be the gas available before the subcall, such that the subcall gets at most X * 63 / 64.
// We can't know X after CALL dynamic costs, but we want it to be such that X * 63 / 64 >= req.gas.
// Let Y be the gas used in the subcall. gasleft() measured immediately after the subcall will be gasleft() = X - Y.
// If the subcall ran out of gas, then Y = X * 63 / 64 and gasleft() = X - Y = X / 64.
// Under this assumption req.gas / 63 > gasleft() is true is true if and only if
// req.gas / 63 > X / 64, or equivalently req.gas > X * 63 / 64.
// This means that if the subcall runs out of gas we are able to detect that insufficient gas was passed.
//
// We will now also see that req.gas / 63 > gasleft() implies that req.gas >= X * 63 / 64.
// The contract guarantees Y <= req.gas, thus gasleft() = X - Y >= X - req.gas.
// - req.gas / 63 > gasleft()
// - req.gas / 63 >= X - req.gas
// - req.gas >= X * 63 / 64
// In other words if req.gas < X * 63 / 64 then req.gas / 63 <= gasleft(), thus if the relayer behaves honestly
// the forwarding does not revert.
if (gasLeft < request.gas / 63) {
// We explicitly trigger invalid opcode to consume all gas and bubble-up the effects, since
// neither revert or assert consume all gas since Solidity 0.8.20
// https://docs.soliditylang.org/en/v0.8.20/control-structures.html#panic-via-assert-and-error-via-require
/// @solidity memory-safe-assembly
assembly {
invalid()
}
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)
pragma solidity ^0.8.20;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev The ETH balance of the account is not enough to perform the operation.
*/
error AddressInsufficientBalance(address account);
/**
* @dev There's no code at `target` (it is not a contract).
*/
error AddressEmptyCode(address target);
/**
* @dev A call to an address target failed. The target may have reverted.
*/
error FailedInnerCall();
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
if (address(this).balance < amount) {
revert AddressInsufficientBalance(address(this));
}
(bool success, ) = recipient.call{value: amount}("");
if (!success) {
revert FailedInnerCall();
}
}
/**
* @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 or custom error, it is bubbled
* up by this function (like regular Solidity function calls). However, if
* the call reverted with no returned reason, this function reverts with a
* {FailedInnerCall} error.
*
* 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.
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0);
}
/**
* @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`.
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
if (address(this).balance < value) {
revert AddressInsufficientBalance(address(this));
}
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
* was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
* unsuccessful call.
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata
) internal view returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
// only check if target is a contract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
if (returndata.length == 0 && target.code.length == 0) {
revert AddressEmptyCode(target);
}
return returndata;
}
}
/**
* @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
* revert reason or with a default {FailedInnerCall} error.
*/
function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
return returndata;
}
}
/**
* @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
*/
function _revert(bytes memory returndata) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert FailedInnerCall();
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Nonces.sol)
pragma solidity ^0.8.20;
/**
* @dev Provides tracking nonces for addresses. Nonces will only increment.
*/
abstract contract Nonces {
/**
* @dev The nonce used for an `account` is not the expected current nonce.
*/
error InvalidAccountNonce(address account, uint256 currentNonce);
mapping(address account => uint256) private _nonces;
/**
* @dev Returns the next unused nonce for an address.
*/
function nonces(address owner) public view virtual returns (uint256) {
return _nonces[owner];
}
/**
* @dev Consumes a nonce.
*
* Returns the current value and increments nonce.
*/
function _useNonce(address owner) internal virtual returns (uint256) {
// For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be
// decremented or reset. This guarantees that the nonce never overflows.
unchecked {
// It is important to do x++ and not ++x here.
return _nonces[owner]++;
}
}
/**
* @dev Same as {_useNonce} but checking that `nonce` is the next valid for `owner`.
*/
function _useCheckedNonce(address owner, uint256 nonce) internal virtual {
uint256 current = _useNonce(owner);
if (nonce != current) {
revert InvalidAccountNonce(owner, current);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ShortStrings.sol)
pragma solidity ^0.8.20;
import {StorageSlot} from "./StorageSlot.sol";
// | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |
// | length | 0x BB |
type ShortString is bytes32;
/**
* @dev This library provides functions to convert short memory strings
* into a `ShortString` type that can be used as an immutable variable.
*
* Strings of arbitrary length can be optimized using this library if
* they are short enough (up to 31 bytes) by packing them with their
* length (1 byte) in a single EVM word (32 bytes). Additionally, a
* fallback mechanism can be used for every other case.
*
* Usage example:
*
* ```solidity
* contract Named {
* using ShortStrings for *;
*
* ShortString private immutable _name;
* string private _nameFallback;
*
* constructor(string memory contractName) {
* _name = contractName.toShortStringWithFallback(_nameFallback);
* }
*
* function name() external view returns (string memory) {
* return _name.toStringWithFallback(_nameFallback);
* }
* }
* ```
*/
library ShortStrings {
// Used as an identifier for strings longer than 31 bytes.
bytes32 private constant FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;
error StringTooLong(string str);
error InvalidShortString();
/**
* @dev Encode a string of at most 31 chars into a `ShortString`.
*
* This will trigger a `StringTooLong` error is the input string is too long.
*/
function toShortString(string memory str) internal pure returns (ShortString) {
bytes memory bstr = bytes(str);
if (bstr.length > 31) {
revert StringTooLong(str);
}
return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));
}
/**
* @dev Decode a `ShortString` back to a "normal" string.
*/
function toString(ShortString sstr) internal pure returns (string memory) {
uint256 len = byteLength(sstr);
// using `new string(len)` would work locally but is not memory safe.
string memory str = new string(32);
/// @solidity memory-safe-assembly
assembly {
mstore(str, len)
mstore(add(str, 0x20), sstr)
}
return str;
}
/**
* @dev Return the length of a `ShortString`.
*/
function byteLength(ShortString sstr) internal pure returns (uint256) {
uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;
if (result > 31) {
revert InvalidShortString();
}
return result;
}
/**
* @dev Encode a string into a `ShortString`, or write it to storage if it is too long.
*/
function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {
if (bytes(value).length < 32) {
return toShortString(value);
} else {
StorageSlot.getStringSlot(store).value = value;
return ShortString.wrap(FALLBACK_SENTINEL);
}
}
/**
* @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
*/
function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {
if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {
return toString(value);
} else {
return store;
}
}
/**
* @dev Return the length of a string that was encoded to `ShortString` or written to storage using
* {setWithFallback}.
*
* WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of
* actual characters as the UTF-8 encoding of a single character can span over multiple bytes.
*/
function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {
if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {
return byteLength(value);
} else {
return bytes(store).length;
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
pragma solidity ^0.8.20;
/**
* @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:
* ```solidity
* 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(newImplementation.code.length > 0);
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
struct StringSlot {
string value;
}
struct BytesSlot {
bytes value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` with member `value` located at `slot`.
*/
function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` representation of the string storage pointer `store`.
*/
function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
/**
* @dev Returns an `BytesSlot` with member `value` located at `slot`.
*/
function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
*/
function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)
pragma solidity ^0.8.20;
import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant HEX_DIGITS = "0123456789abcdef";
uint8 private constant ADDRESS_LENGTH = 20;
/**
* @dev The `value` string doesn't fit in the specified `length`.
*/
error StringsInsufficientHexLength(uint256 value, uint256 length);
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/
function toStringSigned(int256 value) internal pure returns (string memory) {
return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
uint256 localValue = value;
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = HEX_DIGITS[localValue & 0xf];
localValue >>= 4;
}
if (localValue != 0) {
revert StringsInsufficientHexLength(value, length);
}
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal
* representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);
}
/**
* @dev Returns true if the two strings are equal.
*/
function equal(string memory a, string memory b) internal pure returns (bool) {
return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.20;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS
}
/**
* @dev The signature derives the `address(0)`.
*/
error ECDSAInvalidSignature();
/**
* @dev The signature has an invalid length.
*/
error ECDSAInvalidSignatureLength(uint256 length);
/**
* @dev The signature has an S value that is in the upper half order.
*/
error ECDSAInvalidSignatureS(bytes32 s);
/**
* @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not
* return address(0) without also returning an error description. Errors are documented using an enum (error type)
* and a bytes32 providing additional information about the error.
*
* If no error is returned, then the address can be used for verification purposes.
*
* The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) {
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
/// @solidity memory-safe-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length));
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);
_throwError(error, errorArg);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*/
function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) {
unchecked {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
// We do not check for an overflow here since the shift operation results in 0 or 1.
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*/
function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
(address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);
_throwError(error, errorArg);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError, bytes32) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS, s);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature, bytes32(0));
}
return (signer, RecoverError.NoError, bytes32(0));
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
(address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s);
_throwError(error, errorArg);
return recovered;
}
/**
* @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.
*/
function _throwError(RecoverError error, bytes32 errorArg) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert ECDSAInvalidSignature();
} else if (error == RecoverError.InvalidSignatureLength) {
revert ECDSAInvalidSignatureLength(uint256(errorArg));
} else if (error == RecoverError.InvalidSignatureS) {
revert ECDSAInvalidSignatureS(errorArg);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/EIP712.sol)
pragma solidity ^0.8.20;
import {MessageHashUtils} from "./MessageHashUtils.sol";
import {ShortStrings, ShortString} from "../ShortStrings.sol";
import {IERC5267} from "../../interfaces/IERC5267.sol";
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose
* encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract
* does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to
* produce the hash of their typed data using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
* separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the
* separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
*
* @custom:oz-upgrades-unsafe-allow state-variable-immutable
*/
abstract contract EIP712 is IERC5267 {
using ShortStrings for *;
bytes32 private constant TYPE_HASH =
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
// Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
// invalidate the cached domain separator if the chain id changes.
bytes32 private immutable _cachedDomainSeparator;
uint256 private immutable _cachedChainId;
address private immutable _cachedThis;
bytes32 private immutable _hashedName;
bytes32 private immutable _hashedVersion;
ShortString private immutable _name;
ShortString private immutable _version;
string private _nameFallback;
string private _versionFallback;
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
constructor(string memory name, string memory version) {
_name = name.toShortStringWithFallback(_nameFallback);
_version = version.toShortStringWithFallback(_versionFallback);
_hashedName = keccak256(bytes(name));
_hashedVersion = keccak256(bytes(version));
_cachedChainId = block.chainid;
_cachedDomainSeparator = _buildDomainSeparator();
_cachedThis = address(this);
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
return _cachedDomainSeparator;
} else {
return _buildDomainSeparator();
}
}
function _buildDomainSeparator() private view returns (bytes32) {
return keccak256(abi.encode(TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash);
}
/**
* @dev See {IERC-5267}.
*/
function eip712Domain()
public
view
virtual
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
)
{
return (
hex"0f", // 01111
_EIP712Name(),
_EIP712Version(),
block.chainid,
address(this),
bytes32(0),
new uint256[](0)
);
}
/**
* @dev The name parameter for the EIP712 domain.
*
* NOTE: By default this function reads _name which is an immutable value.
* It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
*/
// solhint-disable-next-line func-name-mixedcase
function _EIP712Name() internal view returns (string memory) {
return _name.toStringWithFallback(_nameFallback);
}
/**
* @dev The version parameter for the EIP712 domain.
*
* NOTE: By default this function reads _version which is an immutable value.
* It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
*/
// solhint-disable-next-line func-name-mixedcase
function _EIP712Version() internal view returns (string memory) {
return _version.toStringWithFallback(_versionFallback);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol)
pragma solidity ^0.8.20;
import {Strings} from "../Strings.sol";
/**
* @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing.
*
* The library provides methods for generating a hash of a message that conforms to the
* https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712]
* specifications.
*/
library MessageHashUtils {
/**
* @dev Returns the keccak256 digest of an EIP-191 signed data with version
* `0x45` (`personal_sign` messages).
*
* The digest is calculated by prefixing a bytes32 `messageHash` with
* `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the
* hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
*
* NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with
* keccak256, although any bytes32 value can be safely used because the final digest will
* be re-hashed.
*
* See {ECDSA-recover}.
*/
function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) {
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash
mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix
digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20)
}
}
/**
* @dev Returns the keccak256 digest of an EIP-191 signed data with version
* `0x45` (`personal_sign` messages).
*
* The digest is calculated by prefixing an arbitrary `message` with
* `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the
* hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
*
* See {ECDSA-recover}.
*/
function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) {
return
keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message));
}
/**
* @dev Returns the keccak256 digest of an EIP-191 signed data with version
* `0x00` (data with intended validator).
*
* The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended
* `validator` address. Then hashing the result.
*
* See {ECDSA-recover}.
*/
function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
return keccak256(abi.encodePacked(hex"19_00", validator, data));
}
/**
* @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`).
*
* The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with
* `\x19\x01` and hashing the result. It corresponds to the hash signed by the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.
*
* See {ECDSA-recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) {
/// @solidity memory-safe-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, hex"19_01")
mstore(add(ptr, 0x02), domainSeparator)
mstore(add(ptr, 0x22), structHash)
digest := keccak256(ptr, 0x42)
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)
pragma solidity ^0.8.20;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Muldiv operation overflow.
*/
error MathOverflowedMulDiv();
enum Rounding {
Floor, // Toward negative infinity
Ceil, // Toward positive infinity
Trunc, // Toward zero
Expand // Away from zero
}
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the subtraction of two unsigned integers, with an overflow flag.
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds towards infinity instead
* of rounding towards zero.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
if (b == 0) {
// Guarantee the same behavior as in a regular Solidity division.
return a / b;
}
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
* denominator == 0.
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
* Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0 = x * y; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
if (denominator <= prod1) {
revert MathOverflowedMulDiv();
}
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator.
// Always >= 1. See https://cs.stackexchange.com/q/138556/92363.
uint256 twos = denominator & (0 - denominator);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
// works in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
* towards zero.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2 of a positive value rounded towards zero.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10 of a positive value rounded towards zero.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256 of a positive value rounded towards zero.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
}
}
/**
* @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
*/
function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
return uint8(rounding) % 2 == 1;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.20;
/**
* @dev Standard signed math utilities missing in the Solidity language.
*/
library SignedMath {
/**
* @dev Returns the largest of two signed numbers.
*/
function max(int256 a, int256 b) internal pure returns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/
function min(int256 a, int256 b) internal pure returns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/
function average(int256 a, int256 b) internal pure returns (int256) {
// Formula from the book "Hacker's Delight"
int256 x = (a & b) + ((a ^ b) >> 1);
return x + (int256(uint256(x) >> 255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/
function abs(int256 n) internal pure returns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`
return uint256(n >= 0 ? n : -n);
}
}
}{
"optimizer": {
"enabled": true,
"runs": 1000000
},
"evmVersion": "paris",
"remappings": [
"@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
"ds-test/=lib/forge-std/lib/ds-test/src/",
"erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
"forge-std/=lib/forge-std/src/",
"openzeppelin-contracts/=lib/openzeppelin-contracts/"
],
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[{"internalType":"uint48","name":"deadline","type":"uint48"}],"name":"ERC2771ForwarderExpiredRequest","type":"error"},{"inputs":[{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"from","type":"address"}],"name":"ERC2771ForwarderInvalidSigner","type":"error"},{"inputs":[{"internalType":"uint256","name":"requestedValue","type":"uint256"},{"internalType":"uint256","name":"msgValue","type":"uint256"}],"name":"ERC2771ForwarderMismatchedValue","type":"error"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"address","name":"forwarder","type":"address"}],"name":"ERC2771UntrustfulTarget","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"currentNonce","type":"uint256"}],"name":"InvalidAccountNonce","type":"error"},{"inputs":[],"name":"InvalidShortString","type":"error"},{"inputs":[{"internalType":"string","name":"str","type":"string"}],"name":"StringTooLong","type":"error"},{"anonymous":false,"inputs":[],"name":"EIP712DomainChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"signer","type":"address"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"},{"indexed":false,"internalType":"bool","name":"success","type":"bool"}],"name":"ExecutedForwardRequest","type":"event"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Call[]","name":"calls","type":"tuple[]"}],"name":"aggregate","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"bytes[]","name":"returnData","type":"bytes[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bool","name":"requireSuccess","type":"bool"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Call3[]","name":"calls","type":"tuple[]"}],"name":"aggregate3","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bool","name":"requireSuccess","type":"bool"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Call3Value[]","name":"calls","type":"tuple[]"}],"name":"aggregate3Value","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Call[]","name":"calls","type":"tuple[]"}],"name":"blockAndAggregate","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"bytes32","name":"blockHash","type":"bytes32"},{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"eip712Domain","outputs":[{"internalType":"bytes1","name":"fields","type":"bytes1"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"version","type":"string"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"address","name":"verifyingContract","type":"address"},{"internalType":"bytes32","name":"salt","type":"bytes32"},{"internalType":"uint256[]","name":"extensions","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"gas","type":"uint256"},{"internalType":"uint48","name":"deadline","type":"uint48"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct ERC2771Forwarder.ForwardRequestData","name":"request","type":"tuple"}],"name":"execute","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"gas","type":"uint256"},{"internalType":"uint48","name":"deadline","type":"uint48"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct ERC2771Forwarder.ForwardRequestData[]","name":"requests","type":"tuple[]"}],"name":"executeBatch","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"gas","type":"uint256"},{"internalType":"uint48","name":"deadline","type":"uint48"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct ERC2771Forwarder.ForwardRequestData[]","name":"requests","type":"tuple[]"},{"internalType":"address payable","name":"refundReceiver","type":"address"}],"name":"executeBatch","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"getBasefee","outputs":[{"internalType":"uint256","name":"basefee","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getBlockHash","outputs":[{"internalType":"bytes32","name":"blockHash","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBlockNumber","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getChainId","outputs":[{"internalType":"uint256","name":"chainid","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentBlockCoinbase","outputs":[{"internalType":"address","name":"coinbase","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentBlockGasLimit","outputs":[{"internalType":"uint256","name":"gaslimit","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentBlockTimestamp","outputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"getEthBalance","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLastBlockHash","outputs":[{"internalType":"bytes32","name":"blockHash","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPrevRandao","outputs":[{"internalType":"uint256","name":"prevrandao","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"requireSuccess","type":"bool"},{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Call[]","name":"calls","type":"tuple[]"}],"name":"tryAggregate","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"requireSuccess","type":"bool"},{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Call[]","name":"calls","type":"tuple[]"}],"name":"tryBlockAndAggregate","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"bytes32","name":"blockHash","type":"bytes32"},{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct TrustedMulticallForwarder.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"gas","type":"uint256"},{"internalType":"uint48","name":"deadline","type":"uint48"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct ERC2771Forwarder.ForwardRequestData","name":"request","type":"tuple"}],"name":"verify","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]Contract Creation Code
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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.