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Contract Source Code Verified (Exact Match)
Contract Name:
LBTC
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
import {ERC20Upgradeable, IERC20} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import {ERC20PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC20PausableUpgradeable.sol";
import {ERC20PermitUpgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC20PermitUpgradeable.sol";
import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {BitcoinUtils, OutputType} from "../libs/BitcoinUtils.sol";
import {IBascule} from "../bascule/interfaces/IBascule.sol";
import {ILBTC} from "./ILBTC.sol";
import {FeeUtils} from "../libs/FeeUtils.sol";
import {Consortium} from "../consortium/Consortium.sol";
import {Actions} from "../libs/Actions.sol";
import {EIP1271SignatureUtils} from "../libs/EIP1271SignatureUtils.sol";
/**
* @title ERC20 representation of Lombard Staked Bitcoin
* @author Lombard.Finance
* @notice The contracts is a part of Lombard.Finace protocol
*/
contract LBTC is
ILBTC,
ERC20PausableUpgradeable,
Ownable2StepUpgradeable,
ReentrancyGuardUpgradeable,
ERC20PermitUpgradeable
{
/// @custom:storage-location erc7201:lombardfinance.storage.LBTC
struct LBTCStorage {
/// @dev is keccak256(payload[4:]) used
/// @custom:oz-renamed-from usedProofs
mapping(bytes32 => bool) legacyUsedPayloads;
string name;
string symbol;
bool isWithdrawalsEnabled;
address consortium;
bool isWBTCEnabled;
IERC20 wbtc;
address treasury;
/// @custom:oz-renamed-from destinations
mapping(uint256 => address) __removed_destinations;
/// @custom:oz-renamed-from depositCommission
mapping(uint256 => uint16) __removed_depositCommission;
/// @custom:oz-renamed-from usedBridgeProofs
mapping(bytes32 => bool) __removed_usedBridgeProofs;
/// @custom:oz-renamed-from globalNonce
uint256 __removed_globalNonce;
mapping(bytes32 => bytes32) __removed__destinations;
mapping(bytes32 => uint16) __removed__depositRelativeCommission;
mapping(bytes32 => uint64) __removed__depositAbsoluteCommission;
uint64 burnCommission; // absolute commission to charge on burn (unstake)
uint256 dustFeeRate;
/// Bascule drawbridge used to confirm deposits before allowing withdrawals
IBascule bascule;
address pauser;
mapping(address => bool) minters;
mapping(address => bool) claimers;
/// Maximum fee to apply on mints
uint256 maximumFee;
// @dev is sha256(payload) used
mapping(bytes32 => bool) usedPayloads;
address operator;
}
// keccak256(abi.encode(uint256(keccak256("lombardfinance.storage.LBTC")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant LBTC_STORAGE_LOCATION =
0xa9a2395ec4edf6682d754acb293b04902817fdb5829dd13adb0367ab3a26c700;
/// @dev https://docs.openzeppelin.com/upgrades-plugins/1.x/writing-upgradeable#initializing_the_implementation_contract
/// @custom:oz-upgrades-unsafe-allow constructor
constructor() {
_disableInitializers();
}
/// INTIALIZERS ///
function initialize(
address consortium_,
uint64 burnCommission_,
address treasury,
address owner_
) external initializer {
__ERC20_init("", "");
__ERC20Pausable_init();
__Ownable_init(owner_);
__Ownable2Step_init();
__ReentrancyGuard_init();
__LBTC_init(
"Lombard Staked Bitcoin",
"LBTC",
consortium_,
treasury,
burnCommission_
);
LBTCStorage storage $ = _getLBTCStorage();
$.dustFeeRate = BitcoinUtils.DEFAULT_DUST_FEE_RATE;
emit DustFeeRateChanged(0, $.dustFeeRate);
}
function reinitialize() external reinitializer(2) {
__ERC20Permit_init("Lombard Staked Bitcoin");
}
/// MODIFIER ///
/**
* PAUSE
*/
modifier onlyPauser() {
_checkPauser();
_;
}
modifier onlyMinter() {
if (!_getLBTCStorage().minters[_msgSender()]) {
revert UnauthorizedAccount(_msgSender());
}
_;
}
modifier onlyClaimer() {
if (!_getLBTCStorage().claimers[_msgSender()]) {
revert UnauthorizedAccount(_msgSender());
}
_;
}
modifier onlyOperator() {
if (_getLBTCStorage().operator != _msgSender()) {
revert UnauthorizedAccount(_msgSender());
}
_;
}
/// ONLY OWNER FUNCTIONS ///
function toggleWithdrawals() external onlyOwner {
LBTCStorage storage $ = _getLBTCStorage();
$.isWithdrawalsEnabled = !$.isWithdrawalsEnabled;
emit WithdrawalsEnabled($.isWithdrawalsEnabled);
}
function changeNameAndSymbol(
string calldata name_,
string calldata symbol_
) external onlyOwner {
_changeNameAndSymbol(name_, symbol_);
}
function changeConsortium(address newVal) external onlyOwner {
_changeConsortium(newVal);
}
/**
* @notice Set the contract current fee for mint
* @param fee New fee value
* @dev zero allowed to disable fee
*/
function setMintFee(uint256 fee) external onlyOperator {
LBTCStorage storage $ = _getLBTCStorage();
uint256 oldFee = $.maximumFee;
$.maximumFee = fee;
emit FeeChanged(oldFee, fee);
}
function changeTreasuryAddress(address newValue) external onlyOwner {
_changeTreasuryAddress(newValue);
}
function changeBurnCommission(uint64 newValue) external onlyOwner {
_changeBurnCommission(newValue);
}
function pause() external onlyPauser {
_pause();
}
function unpause() external onlyPauser {
_unpause();
}
function addMinter(address newMinter) external onlyOwner {
_updateMinter(newMinter, true);
}
function removeMinter(address oldMinter) external onlyOwner {
_updateMinter(oldMinter, false);
}
function addClaimer(address newClaimer) external onlyOwner {
_updateClaimer(newClaimer, true);
}
function removeClaimer(address oldClaimer) external onlyOwner {
_updateClaimer(oldClaimer, false);
}
/// @notice Change the dust fee rate used for dust limit calculations
/// @dev Only the contract owner can call this function. The new rate must be positive.
/// @param newRate The new dust fee rate (in satoshis per 1000 bytes)
function changeDustFeeRate(uint256 newRate) external onlyOwner {
if (newRate == 0) revert InvalidDustFeeRate();
LBTCStorage storage $ = _getLBTCStorage();
uint256 oldRate = $.dustFeeRate;
$.dustFeeRate = newRate;
emit DustFeeRateChanged(oldRate, newRate);
}
/**
* Change the address of the Bascule drawbridge contract.
* Setting the address to 0 disables the Bascule check.
* @param newVal The new address.
*
* Emits a {BasculeChanged} event.
*/
function changeBascule(address newVal) external onlyOwner {
_changeBascule(newVal);
}
function transferPauserRole(address newPauser) external onlyOwner {
if (newPauser == address(0)) {
revert ZeroAddress();
}
_transferPauserRole(newPauser);
}
function transferOperatorRole(address newOperator) external onlyOwner {
if (newOperator == address(0)) {
revert ZeroAddress();
}
_transferOperatorRole(newOperator);
}
/// GETTERS ///
/**
* @notice Returns the current maximum mint fee
*/
function getMintFee() external view returns (uint256) {
return _getLBTCStorage().maximumFee;
}
/// @notice Calculate the amount that will be unstaked and check if it's above the dust limit
/// @dev This function can be used by front-ends to verify burn amounts before submitting a transaction
/// @param scriptPubkey The Bitcoin script public key as a byte array
/// @param amount The amount of LBTC to be burned
/// @return amountAfterFee The amount that will be unstaked (after deducting the burn commission)
/// @return isAboveDust Whether the amountAfterFee is equal to or above the dust limit
function calcUnstakeRequestAmount(
bytes calldata scriptPubkey,
uint256 amount
) external view returns (uint256 amountAfterFee, bool isAboveDust) {
LBTCStorage storage $ = _getLBTCStorage();
(amountAfterFee, , , isAboveDust) = _calcFeeAndDustLimit(
scriptPubkey,
amount,
$.burnCommission
);
return (amountAfterFee, isAboveDust);
}
function consortium() external view virtual returns (address) {
return _getLBTCStorage().consortium;
}
/**
* @dev Returns the number of decimals used to get its user representation.
*
* Because LBTC repsents BTC we use the same decimals.
*
*/
function decimals() public view virtual override returns (uint8) {
return 8;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _getLBTCStorage().name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _getLBTCStorage().symbol;
}
function getTreasury() public view returns (address) {
return _getLBTCStorage().treasury;
}
function getBurnCommission() public view returns (uint64) {
return _getLBTCStorage().burnCommission;
}
/// @notice Get the current dust fee rate
/// @return The current dust fee rate (in satoshis per 1000 bytes)
function getDustFeeRate() public view returns (uint256) {
return _getLBTCStorage().dustFeeRate;
}
/**
* Get Bascule contract.
*/
function Bascule() external view returns (IBascule) {
return _getLBTCStorage().bascule;
}
function pauser() public view returns (address) {
return _getLBTCStorage().pauser;
}
function operator() external view returns (address) {
return _getLBTCStorage().operator;
}
function isMinter(address minter) external view returns (bool) {
return _getLBTCStorage().minters[minter];
}
function isClaimer(address claimer) external view returns (bool) {
return _getLBTCStorage().claimers[claimer];
}
/// USER ACTIONS ///
/**
* @notice Mint LBTC to the specified address
* @param to The address to mint to
* @param amount The amount of LBTC to mint
* @dev Only callable by whitelisted minters
*/
function mint(address to, uint256 amount) external override onlyMinter {
_mint(to, amount);
}
/**
* @notice Mint LBTC in batches
* @param to The addresses to mint to
* @param amount The amounts of LBTC to mint
* @dev Only callable by whitelisted minters
*/
function batchMint(
address[] calldata to,
uint256[] calldata amount
) external onlyMinter {
if (to.length != amount.length) {
revert InvalidInputLength();
}
for (uint256 i; i < to.length; ++i) {
_mint(to[i], amount[i]);
}
}
/**
* @notice Mint LBTC by proving a stake action happened
* @param payload The message with the stake data
* @param proof Signature of the consortium approving the mint
*/
function mint(
bytes calldata payload,
bytes calldata proof
) public nonReentrant {
// payload validation
if (bytes4(payload) != Actions.DEPOSIT_BTC_ACTION) {
revert UnexpectedAction(bytes4(payload));
}
Actions.DepositBtcAction memory action = Actions.depositBtc(
payload[4:]
);
_validateAndMint(
action.recipient,
action.amount,
action.amount,
payload,
proof
);
}
/**
* @notice Mint LBTC in batches by proving stake actions happened
* @param payload The messages with the stake data
* @param proof Signatures of the consortium approving the mints
*/
function batchMint(
bytes[] calldata payload,
bytes[] calldata proof
) external {
if (payload.length != proof.length) {
revert InvalidInputLength();
}
for (uint256 i; i < payload.length; ++i) {
// Pre-emptive check if payload was used. If so, we can skip the call.
bytes32 payloadHash = sha256(payload[i]);
bytes32 legacyPayloadHash = keccak256(payload[i][4:]);
if (isPayloadUsed(payloadHash, legacyPayloadHash)) {
emit BatchMintSkipped(payloadHash, payload[i]);
continue;
}
mint(payload[i], proof[i]);
}
}
/**
* @notice Mint LBTC applying a commission to the amount
* @dev Payload should be same as mint to avoid reusing them with and without fee
* @param mintPayload The message with the stake data
* @param proof Signature of the consortium approving the mint
* @param feePayload Contents of the fee approval signed by the user
* @param userSignature Signature of the user to allow Fee
*/
function mintWithFee(
bytes calldata mintPayload,
bytes calldata proof,
bytes calldata feePayload,
bytes calldata userSignature
) external onlyClaimer {
_mintWithFee(mintPayload, proof, feePayload, userSignature);
}
/**
* @notice Mint LBTC in batches proving stake actions happened
* @param mintPayload The messages with the stake data
* @param proof Signatures of the consortium approving the mints
* @param feePayload Contents of the fee approvals signed by the user
* @param userSignature Signatures of the user to allow Fees
*/
function batchMintWithFee(
bytes[] calldata mintPayload,
bytes[] calldata proof,
bytes[] calldata feePayload,
bytes[] calldata userSignature
) external onlyClaimer {
uint256 length = mintPayload.length;
if (
length != proof.length ||
length != feePayload.length ||
length != userSignature.length
) {
revert InvalidInputLength();
}
for (uint256 i; i < mintPayload.length; ++i) {
// Pre-emptive check if payload was used. If so, we can skip the call.
bytes32 payloadHash = sha256(mintPayload[i]);
bytes32 legacyPayloadHash = keccak256(mintPayload[i][4:]);
if (isPayloadUsed(payloadHash, legacyPayloadHash)) {
emit BatchMintSkipped(payloadHash, mintPayload[i]);
continue;
}
_mintWithFee(
mintPayload[i],
proof[i],
feePayload[i],
userSignature[i]
);
}
}
/**
* @dev Burns LBTC to initiate withdrawal of BTC to provided `scriptPubkey` with `amount`
*
* @param scriptPubkey scriptPubkey for output
* @param amount Amount of LBTC to burn
*/
function redeem(bytes calldata scriptPubkey, uint256 amount) external {
LBTCStorage storage $ = _getLBTCStorage();
if (!$.isWithdrawalsEnabled) {
revert WithdrawalsDisabled();
}
uint64 fee = $.burnCommission;
(
uint256 amountAfterFee,
bool isAboveFee,
uint256 dustLimit,
bool isAboveDust
) = _calcFeeAndDustLimit(scriptPubkey, amount, fee);
if (!isAboveFee) {
revert AmountLessThanCommission(fee);
}
if (!isAboveDust) {
revert AmountBelowDustLimit(dustLimit);
}
address fromAddress = address(_msgSender());
_transfer(fromAddress, getTreasury(), fee);
_burn(fromAddress, amountAfterFee);
emit UnstakeRequest(fromAddress, scriptPubkey, amountAfterFee);
}
/**
* @dev Burns LBTC
*
* @param amount Amount of LBTC to burn
*/
function burn(uint256 amount) external {
_burn(_msgSender(), amount);
}
/**
* @dev Allows minters to burn LBTC
*
* @param amount Amount of LBTC to burn
*/
function burn(address from, uint256 amount) external override onlyMinter {
_burn(from, amount);
}
/**
* @dev Returns whether a minting payload has been used already
*
* @param payloadHash The minting payload hash
* @param legacyPayloadHash The legacy minting payload hash
*/
function isPayloadUsed(
bytes32 payloadHash,
bytes32 legacyPayloadHash
) public view returns (bool) {
LBTCStorage storage $ = _getLBTCStorage();
return
$.usedPayloads[payloadHash] ||
$.legacyUsedPayloads[legacyPayloadHash];
}
/// PRIVATE FUNCTIONS ///
function __LBTC_init(
string memory name_,
string memory symbol_,
address consortium_,
address treasury,
uint64 burnCommission_
) internal onlyInitializing {
_changeNameAndSymbol(name_, symbol_);
_changeConsortium(consortium_);
_changeTreasuryAddress(treasury);
_changeBurnCommission(burnCommission_);
}
function _changeNameAndSymbol(
string memory name_,
string memory symbol_
) internal {
LBTCStorage storage $ = _getLBTCStorage();
$.name = name_;
$.symbol = symbol_;
emit NameAndSymbolChanged(name_, symbol_);
}
function _changeConsortium(address newVal) internal {
if (newVal == address(0)) {
revert ZeroAddress();
}
LBTCStorage storage $ = _getLBTCStorage();
emit ConsortiumChanged($.consortium, newVal);
$.consortium = newVal;
}
function _validateAndMint(
address recipient,
uint256 amountToMint,
uint256 depositAmount,
bytes calldata payload,
bytes calldata proof
) internal {
LBTCStorage storage $ = _getLBTCStorage();
if (amountToMint > depositAmount) revert InvalidMintAmount();
/// make sure that hash of payload not used before
/// need to check new sha256 hash and legacy keccak256 from payload without selector
/// 2 checks made to prevent migration of contract state
bytes32 payloadHash = sha256(payload);
bytes32 legacyHash = keccak256(payload[4:]);
if ($.usedPayloads[payloadHash] || $.legacyUsedPayloads[legacyHash]) {
revert PayloadAlreadyUsed();
}
Consortium($.consortium).checkProof(payloadHash, proof);
$.usedPayloads[payloadHash] = true;
// Confirm deposit against Bascule
_confirmDeposit($, legacyHash, depositAmount);
// Actually mint
_mint(recipient, amountToMint);
emit MintProofConsumed(recipient, payloadHash, payload);
}
function _changeBurnCommission(uint64 newValue) internal {
LBTCStorage storage $ = _getLBTCStorage();
uint64 prevValue = $.burnCommission;
$.burnCommission = newValue;
emit BurnCommissionChanged(prevValue, newValue);
}
/**
* @dev Checks that the deposit was validated by the Bascule drawbridge.
* @param self LBTC storage.
* @param depositID The unique ID of the deposit.
* @param amount The withdrawal amount.
*/
function _confirmDeposit(
LBTCStorage storage self,
bytes32 depositID,
uint256 amount
) internal {
IBascule bascule = self.bascule;
if (address(bascule) != address(0)) {
bascule.validateWithdrawal(depositID, amount);
}
}
/**
* Change the address of the Bascule drawbridge contract.
* @param newVal The new address.
*
* Emits a {BasculeChanged} event.
*/
function _changeBascule(address newVal) internal {
LBTCStorage storage $ = _getLBTCStorage();
emit BasculeChanged(address($.bascule), newVal);
$.bascule = IBascule(newVal);
}
function _transferPauserRole(address newPauser) internal {
LBTCStorage storage $ = _getLBTCStorage();
address oldPauser = $.pauser;
$.pauser = newPauser;
emit PauserRoleTransferred(oldPauser, newPauser);
}
function _transferOperatorRole(address newOperator) internal {
LBTCStorage storage $ = _getLBTCStorage();
address oldOperator = $.operator;
$.operator = newOperator;
emit OperatorRoleTransferred(oldOperator, newOperator);
}
function _mintWithFee(
bytes calldata mintPayload,
bytes calldata proof,
bytes calldata feePayload,
bytes calldata userSignature
) internal nonReentrant {
// mint payload validation
if (bytes4(mintPayload) != Actions.DEPOSIT_BTC_ACTION) {
revert UnexpectedAction(bytes4(mintPayload));
}
Actions.DepositBtcAction memory mintAction = Actions.depositBtc(
mintPayload[4:]
);
// fee payload validation
if (bytes4(feePayload) != Actions.FEE_APPROVAL_ACTION) {
revert UnexpectedAction(bytes4(feePayload));
}
Actions.FeeApprovalAction memory feeAction = Actions.feeApproval(
feePayload[4:]
);
LBTCStorage storage $ = _getLBTCStorage();
uint256 fee = $.maximumFee;
if (fee > feeAction.fee) {
fee = feeAction.fee;
}
if (fee >= mintAction.amount) {
revert FeeGreaterThanAmount();
}
{
// Fee validation
bytes32 digest = _hashTypedDataV4(
keccak256(
abi.encode(
Actions.FEE_APPROVAL_EIP712_ACTION,
block.chainid,
feeAction.fee,
feeAction.expiry
)
)
);
if (
!EIP1271SignatureUtils.checkSignature(
mintAction.recipient,
digest,
userSignature
)
) {
revert InvalidUserSignature();
}
}
// modified payload to be signed
_validateAndMint(
mintAction.recipient,
mintAction.amount - fee,
mintAction.amount,
mintPayload,
proof
);
// mint fee to treasury
_mint($.treasury, fee);
emit FeeCharged(fee, userSignature);
}
function _checkPauser() internal view {
if (pauser() != _msgSender()) {
revert UnauthorizedAccount(_msgSender());
}
}
function _updateMinter(address minter, bool _isMinter) internal {
if (minter == address(0)) {
revert ZeroAddress();
}
_getLBTCStorage().minters[minter] = _isMinter;
emit MinterUpdated(minter, _isMinter);
}
function _updateClaimer(address claimer, bool _isClaimer) internal {
if (claimer == address(0)) {
revert ZeroAddress();
}
_getLBTCStorage().claimers[claimer] = _isClaimer;
emit ClaimerUpdated(claimer, _isClaimer);
}
function _changeTreasuryAddress(address newValue) internal {
if (newValue == address(0)) {
revert ZeroAddress();
}
LBTCStorage storage $ = _getLBTCStorage();
address prevValue = $.treasury;
$.treasury = newValue;
emit TreasuryAddressChanged(prevValue, newValue);
}
function _calcFeeAndDustLimit(
bytes calldata scriptPubkey,
uint256 amount,
uint64 fee
) internal view returns (uint256, bool, uint256, bool) {
OutputType outType = BitcoinUtils.getOutputType(scriptPubkey);
if (outType == OutputType.UNSUPPORTED) {
revert ScriptPubkeyUnsupported();
}
if (amount <= fee) {
return (0, false, 0, false);
}
LBTCStorage storage $ = _getLBTCStorage();
uint256 amountAfterFee = amount - fee;
uint256 dustLimit = BitcoinUtils.getDustLimitForOutput(
outType,
scriptPubkey,
$.dustFeeRate
);
bool isAboveDust = amountAfterFee > dustLimit;
return (amountAfterFee, true, dustLimit, isAboveDust);
}
function _getLBTCStorage() private pure returns (LBTCStorage storage $) {
assembly {
$.slot := LBTC_STORAGE_LOCATION
}
}
/**
* @dev Override of the _update function to satisfy both ERC20Upgradeable and ERC20PausableUpgradeable
*/
function _update(
address from,
address to,
uint256 value
) internal virtual override(ERC20Upgradeable, ERC20PausableUpgradeable) {
super._update(from, to, value);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol)
pragma solidity ^0.8.20;
import {OwnableUpgradeable} from "./OwnableUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* The initial owner is specified at deployment time in the constructor for `Ownable`. This
* can later be changed with {transferOwnership} and {acceptOwnership}.
*
* This module is used through inheritance. It will make available all functions
* from parent (Ownable).
*/
abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
/// @custom:storage-location erc7201:openzeppelin.storage.Ownable2Step
struct Ownable2StepStorage {
address _pendingOwner;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable2Step")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant Ownable2StepStorageLocation = 0x237e158222e3e6968b72b9db0d8043aacf074ad9f650f0d1606b4d82ee432c00;
function _getOwnable2StepStorage() private pure returns (Ownable2StepStorage storage $) {
assembly {
$.slot := Ownable2StepStorageLocation
}
}
event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);
function __Ownable2Step_init() internal onlyInitializing {
}
function __Ownable2Step_init_unchained() internal onlyInitializing {
}
/**
* @dev Returns the address of the pending owner.
*/
function pendingOwner() public view virtual returns (address) {
Ownable2StepStorage storage $ = _getOwnable2StepStorage();
return $._pendingOwner;
}
/**
* @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual override onlyOwner {
Ownable2StepStorage storage $ = _getOwnable2StepStorage();
$._pendingOwner = newOwner;
emit OwnershipTransferStarted(owner(), newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual override {
Ownable2StepStorage storage $ = _getOwnable2StepStorage();
delete $._pendingOwner;
super._transferOwnership(newOwner);
}
/**
* @dev The new owner accepts the ownership transfer.
*/
function acceptOwnership() public virtual {
address sender = _msgSender();
if (pendingOwner() != sender) {
revert OwnableUnauthorizedAccount(sender);
}
_transferOwnership(sender);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* The initial owner is set to the address provided by the deployer. This can
* later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
/// @custom:storage-location erc7201:openzeppelin.storage.Ownable
struct OwnableStorage {
address _owner;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;
function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
assembly {
$.slot := OwnableStorageLocation
}
}
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
function __Ownable_init(address initialOwner) internal onlyInitializing {
__Ownable_init_unchained(initialOwner);
}
function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
OwnableStorage storage $ = _getOwnableStorage();
return $._owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
OwnableStorage storage $ = _getOwnableStorage();
address oldOwner = $._owner;
$._owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.20;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```solidity
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
*
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Storage of the initializable contract.
*
* It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
* when using with upgradeable contracts.
*
* @custom:storage-location erc7201:openzeppelin.storage.Initializable
*/
struct InitializableStorage {
/**
* @dev Indicates that the contract has been initialized.
*/
uint64 _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool _initializing;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;
/**
* @dev The contract is already initialized.
*/
error InvalidInitialization();
/**
* @dev The contract is not initializing.
*/
error NotInitializing();
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint64 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts.
*
* Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
* number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
* production.
*
* Emits an {Initialized} event.
*/
modifier initializer() {
// solhint-disable-next-line var-name-mixedcase
InitializableStorage storage $ = _getInitializableStorage();
// Cache values to avoid duplicated sloads
bool isTopLevelCall = !$._initializing;
uint64 initialized = $._initialized;
// Allowed calls:
// - initialSetup: the contract is not in the initializing state and no previous version was
// initialized
// - construction: the contract is initialized at version 1 (no reininitialization) and the
// current contract is just being deployed
bool initialSetup = initialized == 0 && isTopLevelCall;
bool construction = initialized == 1 && address(this).code.length == 0;
if (!initialSetup && !construction) {
revert InvalidInitialization();
}
$._initialized = 1;
if (isTopLevelCall) {
$._initializing = true;
}
_;
if (isTopLevelCall) {
$._initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* A reinitializer may be used after the original initialization step. This is essential to configure modules that
* are added through upgrades and that require initialization.
*
* When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
* cannot be nested. If one is invoked in the context of another, execution will revert.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*
* WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
*
* Emits an {Initialized} event.
*/
modifier reinitializer(uint64 version) {
// solhint-disable-next-line var-name-mixedcase
InitializableStorage storage $ = _getInitializableStorage();
if ($._initializing || $._initialized >= version) {
revert InvalidInitialization();
}
$._initialized = version;
$._initializing = true;
_;
$._initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
_checkInitializing();
_;
}
/**
* @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
*/
function _checkInitializing() internal view virtual {
if (!_isInitializing()) {
revert NotInitializing();
}
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*
* Emits an {Initialized} event the first time it is successfully executed.
*/
function _disableInitializers() internal virtual {
// solhint-disable-next-line var-name-mixedcase
InitializableStorage storage $ = _getInitializableStorage();
if ($._initializing) {
revert InvalidInitialization();
}
if ($._initialized != type(uint64).max) {
$._initialized = type(uint64).max;
emit Initialized(type(uint64).max);
}
}
/**
* @dev Returns the highest version that has been initialized. See {reinitializer}.
*/
function _getInitializedVersion() internal view returns (uint64) {
return _getInitializableStorage()._initialized;
}
/**
* @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
*/
function _isInitializing() internal view returns (bool) {
return _getInitializableStorage()._initializing;
}
/**
* @dev Returns a pointer to the storage namespace.
*/
// solhint-disable-next-line var-name-mixedcase
function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
assembly {
$.slot := INITIALIZABLE_STORAGE
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.20;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {ContextUpgradeable} from "../../utils/ContextUpgradeable.sol";
import {IERC20Errors} from "@openzeppelin/contracts/interfaces/draft-IERC6093.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*/
abstract contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20, IERC20Metadata, IERC20Errors {
/// @custom:storage-location erc7201:openzeppelin.storage.ERC20
struct ERC20Storage {
mapping(address account => uint256) _balances;
mapping(address account => mapping(address spender => uint256)) _allowances;
uint256 _totalSupply;
string _name;
string _symbol;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC20")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant ERC20StorageLocation = 0x52c63247e1f47db19d5ce0460030c497f067ca4cebf71ba98eeadabe20bace00;
function _getERC20Storage() private pure returns (ERC20Storage storage $) {
assembly {
$.slot := ERC20StorageLocation
}
}
/**
* @dev Sets the values for {name} and {symbol}.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
ERC20Storage storage $ = _getERC20Storage();
$._name = name_;
$._symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
ERC20Storage storage $ = _getERC20Storage();
return $._name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
ERC20Storage storage $ = _getERC20Storage();
return $._symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the default value returned by this function, unless
* it's overridden.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual returns (uint256) {
ERC20Storage storage $ = _getERC20Storage();
return $._totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual returns (uint256) {
ERC20Storage storage $ = _getERC20Storage();
return $._balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `value`.
*/
function transfer(address to, uint256 value) public virtual returns (bool) {
address owner = _msgSender();
_transfer(owner, to, value);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual returns (uint256) {
ERC20Storage storage $ = _getERC20Storage();
return $._allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 value) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, value);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `value`.
* - the caller must have allowance for ``from``'s tokens of at least
* `value`.
*/
function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, value);
_transfer(from, to, value);
return true;
}
/**
* @dev Moves a `value` amount of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* NOTE: This function is not virtual, {_update} should be overridden instead.
*/
function _transfer(address from, address to, uint256 value) internal {
if (from == address(0)) {
revert ERC20InvalidSender(address(0));
}
if (to == address(0)) {
revert ERC20InvalidReceiver(address(0));
}
_update(from, to, value);
}
/**
* @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
* (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
* this function.
*
* Emits a {Transfer} event.
*/
function _update(address from, address to, uint256 value) internal virtual {
ERC20Storage storage $ = _getERC20Storage();
if (from == address(0)) {
// Overflow check required: The rest of the code assumes that totalSupply never overflows
$._totalSupply += value;
} else {
uint256 fromBalance = $._balances[from];
if (fromBalance < value) {
revert ERC20InsufficientBalance(from, fromBalance, value);
}
unchecked {
// Overflow not possible: value <= fromBalance <= totalSupply.
$._balances[from] = fromBalance - value;
}
}
if (to == address(0)) {
unchecked {
// Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
$._totalSupply -= value;
}
} else {
unchecked {
// Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
$._balances[to] += value;
}
}
emit Transfer(from, to, value);
}
/**
* @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
* Relies on the `_update` mechanism
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* NOTE: This function is not virtual, {_update} should be overridden instead.
*/
function _mint(address account, uint256 value) internal {
if (account == address(0)) {
revert ERC20InvalidReceiver(address(0));
}
_update(address(0), account, value);
}
/**
* @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
* Relies on the `_update` mechanism.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* NOTE: This function is not virtual, {_update} should be overridden instead
*/
function _burn(address account, uint256 value) internal {
if (account == address(0)) {
revert ERC20InvalidSender(address(0));
}
_update(account, address(0), value);
}
/**
* @dev Sets `value` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*
* Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
*/
function _approve(address owner, address spender, uint256 value) internal {
_approve(owner, spender, value, true);
}
/**
* @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
*
* By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
* `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
* `Approval` event during `transferFrom` operations.
*
* Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
* true using the following override:
* ```
* function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
* super._approve(owner, spender, value, true);
* }
* ```
*
* Requirements are the same as {_approve}.
*/
function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
ERC20Storage storage $ = _getERC20Storage();
if (owner == address(0)) {
revert ERC20InvalidApprover(address(0));
}
if (spender == address(0)) {
revert ERC20InvalidSpender(address(0));
}
$._allowances[owner][spender] = value;
if (emitEvent) {
emit Approval(owner, spender, value);
}
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `value`.
*
* Does not update the allowance value in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Does not emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
if (currentAllowance < value) {
revert ERC20InsufficientAllowance(spender, currentAllowance, value);
}
unchecked {
_approve(owner, spender, currentAllowance - value, false);
}
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/ERC20Pausable.sol)
pragma solidity ^0.8.20;
import {ERC20Upgradeable} from "../ERC20Upgradeable.sol";
import {PausableUpgradeable} from "../../../utils/PausableUpgradeable.sol";
import {Initializable} from "../../../proxy/utils/Initializable.sol";
/**
* @dev ERC20 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*
* IMPORTANT: This contract does not include public pause and unpause functions. In
* addition to inheriting this contract, you must define both functions, invoking the
* {Pausable-_pause} and {Pausable-_unpause} internal functions, with appropriate
* access control, e.g. using {AccessControl} or {Ownable}. Not doing so will
* make the contract pause mechanism of the contract unreachable, and thus unusable.
*/
abstract contract ERC20PausableUpgradeable is Initializable, ERC20Upgradeable, PausableUpgradeable {
function __ERC20Pausable_init() internal onlyInitializing {
__Pausable_init_unchained();
}
function __ERC20Pausable_init_unchained() internal onlyInitializing {
}
/**
* @dev See {ERC20-_update}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _update(address from, address to, uint256 value) internal virtual override whenNotPaused {
super._update(from, to, value);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/ERC20Permit.sol)
pragma solidity ^0.8.20;
import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
import {ERC20Upgradeable} from "../ERC20Upgradeable.sol";
import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import {EIP712Upgradeable} from "../../../utils/cryptography/EIP712Upgradeable.sol";
import {NoncesUpgradeable} from "../../../utils/NoncesUpgradeable.sol";
import {Initializable} from "../../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
abstract contract ERC20PermitUpgradeable is Initializable, ERC20Upgradeable, IERC20Permit, EIP712Upgradeable, NoncesUpgradeable {
bytes32 private constant PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/**
* @dev Permit deadline has expired.
*/
error ERC2612ExpiredSignature(uint256 deadline);
/**
* @dev Mismatched signature.
*/
error ERC2612InvalidSigner(address signer, address owner);
/**
* @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
*
* It's a good idea to use the same `name` that is defined as the ERC20 token name.
*/
function __ERC20Permit_init(string memory name) internal onlyInitializing {
__EIP712_init_unchained(name, "1");
}
function __ERC20Permit_init_unchained(string memory) internal onlyInitializing {}
/**
* @inheritdoc IERC20Permit
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
if (block.timestamp > deadline) {
revert ERC2612ExpiredSignature(deadline);
}
bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
if (signer != owner) {
revert ERC2612InvalidSigner(signer, owner);
}
_approve(owner, spender, value);
}
/**
* @inheritdoc IERC20Permit
*/
function nonces(address owner) public view virtual override(IERC20Permit, NoncesUpgradeable) returns (uint256) {
return super.nonces(owner);
}
/**
* @inheritdoc IERC20Permit
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view virtual returns (bytes32) {
return _domainSeparatorV4();
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @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 ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/EIP712.sol)
pragma solidity ^0.8.20;
import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
import {IERC5267} from "@openzeppelin/contracts/interfaces/IERC5267.sol";
import {Initializable} from "../../proxy/utils/Initializable.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.
*/
abstract contract EIP712Upgradeable is Initializable, IERC5267 {
bytes32 private constant TYPE_HASH =
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
/// @custom:storage-location erc7201:openzeppelin.storage.EIP712
struct EIP712Storage {
/// @custom:oz-renamed-from _HASHED_NAME
bytes32 _hashedName;
/// @custom:oz-renamed-from _HASHED_VERSION
bytes32 _hashedVersion;
string _name;
string _version;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.EIP712")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant EIP712StorageLocation = 0xa16a46d94261c7517cc8ff89f61c0ce93598e3c849801011dee649a6a557d100;
function _getEIP712Storage() private pure returns (EIP712Storage storage $) {
assembly {
$.slot := EIP712StorageLocation
}
}
/**
* @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].
*/
function __EIP712_init(string memory name, string memory version) internal onlyInitializing {
__EIP712_init_unchained(name, version);
}
function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing {
EIP712Storage storage $ = _getEIP712Storage();
$._name = name;
$._version = version;
// Reset prior values in storage if upgrading
$._hashedName = 0;
$._hashedVersion = 0;
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
return _buildDomainSeparator();
}
function _buildDomainSeparator() private view returns (bytes32) {
return keccak256(abi.encode(TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash(), 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
)
{
EIP712Storage storage $ = _getEIP712Storage();
// If the hashed name and version in storage are non-zero, the contract hasn't been properly initialized
// and the EIP712 domain is not reliable, as it will be missing name and version.
require($._hashedName == 0 && $._hashedVersion == 0, "EIP712: Uninitialized");
return (
hex"0f", // 01111
_EIP712Name(),
_EIP712Version(),
block.chainid,
address(this),
bytes32(0),
new uint256[](0)
);
}
/**
* @dev The name parameter for the EIP712 domain.
*
* NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
* are a concern.
*/
function _EIP712Name() internal view virtual returns (string memory) {
EIP712Storage storage $ = _getEIP712Storage();
return $._name;
}
/**
* @dev The version parameter for the EIP712 domain.
*
* NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
* are a concern.
*/
function _EIP712Version() internal view virtual returns (string memory) {
EIP712Storage storage $ = _getEIP712Storage();
return $._version;
}
/**
* @dev The hash of the name parameter for the EIP712 domain.
*
* NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Name` instead.
*/
function _EIP712NameHash() internal view returns (bytes32) {
EIP712Storage storage $ = _getEIP712Storage();
string memory name = _EIP712Name();
if (bytes(name).length > 0) {
return keccak256(bytes(name));
} else {
// If the name is empty, the contract may have been upgraded without initializing the new storage.
// We return the name hash in storage if non-zero, otherwise we assume the name is empty by design.
bytes32 hashedName = $._hashedName;
if (hashedName != 0) {
return hashedName;
} else {
return keccak256("");
}
}
}
/**
* @dev The hash of the version parameter for the EIP712 domain.
*
* NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Version` instead.
*/
function _EIP712VersionHash() internal view returns (bytes32) {
EIP712Storage storage $ = _getEIP712Storage();
string memory version = _EIP712Version();
if (bytes(version).length > 0) {
return keccak256(bytes(version));
} else {
// If the version is empty, the contract may have been upgraded without initializing the new storage.
// We return the version hash in storage if non-zero, otherwise we assume the version is empty by design.
bytes32 hashedVersion = $._hashedVersion;
if (hashedVersion != 0) {
return hashedVersion;
} else {
return keccak256("");
}
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Nonces.sol)
pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Provides tracking nonces for addresses. Nonces will only increment.
*/
abstract contract NoncesUpgradeable is Initializable {
/**
* @dev The nonce used for an `account` is not the expected current nonce.
*/
error InvalidAccountNonce(address account, uint256 currentNonce);
/// @custom:storage-location erc7201:openzeppelin.storage.Nonces
struct NoncesStorage {
mapping(address account => uint256) _nonces;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Nonces")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant NoncesStorageLocation = 0x5ab42ced628888259c08ac98db1eb0cf702fc1501344311d8b100cd1bfe4bb00;
function _getNoncesStorage() private pure returns (NoncesStorage storage $) {
assembly {
$.slot := NoncesStorageLocation
}
}
function __Nonces_init() internal onlyInitializing {
}
function __Nonces_init_unchained() internal onlyInitializing {
}
/**
* @dev Returns the next unused nonce for an address.
*/
function nonces(address owner) public view virtual returns (uint256) {
NoncesStorage storage $ = _getNoncesStorage();
return $._nonces[owner];
}
/**
* @dev Consumes a nonce.
*
* Returns the current value and increments nonce.
*/
function _useNonce(address owner) internal virtual returns (uint256) {
NoncesStorage storage $ = _getNoncesStorage();
// 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/Pausable.sol)
pragma solidity ^0.8.20;
import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/// @custom:storage-location erc7201:openzeppelin.storage.Pausable
struct PausableStorage {
bool _paused;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Pausable")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant PausableStorageLocation = 0xcd5ed15c6e187e77e9aee88184c21f4f2182ab5827cb3b7e07fbedcd63f03300;
function _getPausableStorage() private pure returns (PausableStorage storage $) {
assembly {
$.slot := PausableStorageLocation
}
}
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
/**
* @dev The operation failed because the contract is paused.
*/
error EnforcedPause();
/**
* @dev The operation failed because the contract is not paused.
*/
error ExpectedPause();
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal onlyInitializing {
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal onlyInitializing {
PausableStorage storage $ = _getPausableStorage();
$._paused = false;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
_requireNotPaused();
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
_requirePaused();
_;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
PausableStorage storage $ = _getPausableStorage();
return $._paused;
}
/**
* @dev Throws if the contract is paused.
*/
function _requireNotPaused() internal view virtual {
if (paused()) {
revert EnforcedPause();
}
}
/**
* @dev Throws if the contract is not paused.
*/
function _requirePaused() internal view virtual {
if (!paused()) {
revert ExpectedPause();
}
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
PausableStorage storage $ = _getPausableStorage();
$._paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
PausableStorage storage $ = _getPausableStorage();
$._paused = false;
emit Unpaused(_msgSender());
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)
pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant NOT_ENTERED = 1;
uint256 private constant ENTERED = 2;
/// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard
struct ReentrancyGuardStorage {
uint256 _status;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;
function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) {
assembly {
$.slot := ReentrancyGuardStorageLocation
}
}
/**
* @dev Unauthorized reentrant call.
*/
error ReentrancyGuardReentrantCall();
function __ReentrancyGuard_init() internal onlyInitializing {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal onlyInitializing {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
$._status = NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
// On the first call to nonReentrant, _status will be NOT_ENTERED
if ($._status == ENTERED) {
revert ReentrancyGuardReentrantCall();
}
// Any calls to nonReentrant after this point will fail
$._status = ENTERED;
}
function _nonReentrantAfter() private {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
$._status = NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
return $._status == ENTERED;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;
/**
* @dev Standard ERC20 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.
*/
interface IERC20Errors {
/**
* @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param balance Current balance for the interacting account.
* @param needed Minimum amount required to perform a transfer.
*/
error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC20InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC20InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
* @param spender Address that may be allowed to operate on tokens without being their owner.
* @param allowance Amount of tokens a `spender` is allowed to operate with.
* @param needed Minimum amount required to perform a transfer.
*/
error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC20InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `spender` to be approved. Used in approvals.
* @param spender Address that may be allowed to operate on tokens without being their owner.
*/
error ERC20InvalidSpender(address spender);
}
/**
* @dev Standard ERC721 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.
*/
interface IERC721Errors {
/**
* @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.
* Used in balance queries.
* @param owner Address of the current owner of a token.
*/
error ERC721InvalidOwner(address owner);
/**
* @dev Indicates a `tokenId` whose `owner` is the zero address.
* @param tokenId Identifier number of a token.
*/
error ERC721NonexistentToken(uint256 tokenId);
/**
* @dev Indicates an error related to the ownership over a particular token. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param tokenId Identifier number of a token.
* @param owner Address of the current owner of a token.
*/
error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC721InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC721InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `operator`’s approval. Used in transfers.
* @param operator Address that may be allowed to operate on tokens without being their owner.
* @param tokenId Identifier number of a token.
*/
error ERC721InsufficientApproval(address operator, uint256 tokenId);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC721InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `operator` to be approved. Used in approvals.
* @param operator Address that may be allowed to operate on tokens without being their owner.
*/
error ERC721InvalidOperator(address operator);
}
/**
* @dev Standard ERC1155 Errors
* Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.
*/
interface IERC1155Errors {
/**
* @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
* @param balance Current balance for the interacting account.
* @param needed Minimum amount required to perform a transfer.
* @param tokenId Identifier number of a token.
*/
error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);
/**
* @dev Indicates a failure with the token `sender`. Used in transfers.
* @param sender Address whose tokens are being transferred.
*/
error ERC1155InvalidSender(address sender);
/**
* @dev Indicates a failure with the token `receiver`. Used in transfers.
* @param receiver Address to which tokens are being transferred.
*/
error ERC1155InvalidReceiver(address receiver);
/**
* @dev Indicates a failure with the `operator`’s approval. Used in transfers.
* @param operator Address that may be allowed to operate on tokens without being their owner.
* @param owner Address of the current owner of a token.
*/
error ERC1155MissingApprovalForAll(address operator, address owner);
/**
* @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
* @param approver Address initiating an approval operation.
*/
error ERC1155InvalidApprover(address approver);
/**
* @dev Indicates a failure with the `operator` to be approved. Used in approvals.
* @param operator Address that may be allowed to operate on tokens without being their owner.
*/
error ERC1155InvalidOperator(address operator);
/**
* @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
* Used in batch transfers.
* @param idsLength Length of the array of token identifiers
* @param valuesLength Length of the array of token amounts
*/
error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1271.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC1271 standard signature validation method for
* contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
*/
interface IERC1271 {
/**
* @dev Should return whether the signature provided is valid for the provided data
* @param hash Hash of the data to be signed
* @param signature Signature byte array associated with _data
*/
function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}// 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) (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* ==== Security Considerations
*
* There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
* expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
* considered as an intention to spend the allowance in any specific way. The second is that because permits have
* built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
* take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
* generally recommended is:
*
* ```solidity
* function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
* try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
* doThing(..., value);
* }
*
* function doThing(..., uint256 value) public {
* token.safeTransferFrom(msg.sender, address(this), value);
* ...
* }
* ```
*
* Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
* `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
* {SafeERC20-safeTransferFrom}).
*
* Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
* contracts should have entry points that don't rely on permit.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*
* CAUTION: See Security Considerations above.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 value) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 value) external returns (bool);
}// 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/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);
}
}
}// 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 // Compatible with OpenZeppelin Contracts ^5.0.0 pragma solidity 0.8.24; /// Interface of the Bascule contract as used by on-chain contracts. /// @custom:security-contact [email protected] interface IBascule { /** * Event emitted when a withdrawal is validated. * @param withdrawalAmount Amount of the withdrawal. * @param depositID Unique identifier for a deposit that took place on another chain and was withdrawn on this chain. */ event WithdrawalValidated(bytes32 depositID, uint256 withdrawalAmount); /** * Error on attempt to withdraw an already withdrawn deposit. * @param depositID Unique identifier for deposit that failed validation. * @param withdrawalAmount Amount of the withdrawal. */ error AlreadyWithdrawn(bytes32 depositID, uint256 withdrawalAmount); /** * Error when a withdrawal fails validation. * This means the corresponding deposit is not in the map. * @param depositID Unique identifier for deposit that failed validation. * @param withdrawalAmount Amount of the withdrawal. */ error WithdrawalFailedValidation( bytes32 depositID, uint256 withdrawalAmount ); /** * Validate a withdrawal (before executing it) if the amount is above * threshold. * * This function checks if our accounting has recorded a deposit that * corresponds to this withdrawal request. A deposit can only be withdrawn * once. * * @param depositID Unique identifier of the deposit on another chain. * @param withdrawalAmount Amount of the withdrawal. * * Emits {WithdrawalValidated}. */ function validateWithdrawal( bytes32 depositID, uint256 withdrawalAmount ) external; }
// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
import {Actions} from "../libs/Actions.sol";
import {INotaryConsortium} from "./INotaryConsortium.sol";
import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
/// @title The contract utilizes consortium governance functions using multisignature verification
/// @author Lombard.Finance
/// @notice The contracts are a part of the Lombard.Finance protocol
contract Consortium is Ownable2StepUpgradeable, INotaryConsortium {
struct ValidatorSet {
/// @notice addresses of the signers
address[] validators;
/// @notice weight of each signer
uint256[] weights;
/// @notice current threshold for signatures weight to be accepted
uint256 weightThreshold;
}
/// @custom:storage-location erc7201:lombardfinance.storage.Consortium
struct ConsortiumStorage {
/// @notice Current epoch
uint256 epoch;
/// @notice Store the Validator set for each epoch
mapping(uint256 => ValidatorSet) validatorSet;
}
// keccak256(abi.encode(uint256(keccak256("lombardfinance.storage.Consortium")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant CONSORTIUM_STORAGE_LOCATION =
0xbac09a3ab0e06910f94a49c10c16eb53146536ec1a9e948951735cde3a58b500;
/// @dev https://docs.openzeppelin.com/upgrades-plugins/1.x/writing-upgradeable#initializing_the_implementation_contract
/// @custom:oz-upgrades-unsafe-allow constructor
constructor() {
_disableInitializers();
}
/// @notice Initializes the consortium contract
/// @param _owner - The address of the initial owner
function initialize(address _owner) external initializer {
__Ownable_init(_owner);
__Ownable2Step_init();
__Consortium_init();
}
/// ONLY OWNER FUNCTIONS ///
/// @notice Sets the initial validator set from any epoch
/// @param _initialValSet - The initial list of validators
function setInitialValidatorSet(
bytes calldata _initialValSet
) external onlyOwner {
// Payload validation
if (bytes4(_initialValSet) != Actions.NEW_VALSET)
revert UnexpectedAction(bytes4(_initialValSet));
ConsortiumStorage storage $ = _getConsortiumStorage();
Actions.ValSetAction memory action = Actions.validateValSet(
_initialValSet[4:]
);
if ($.epoch != 0) {
revert ValSetAlreadySet();
}
_setValidatorSet(
$,
action.validators,
action.weights,
action.weightThreshold,
action.epoch
);
}
/// USER ACTIONS ///
/// @notice Validates the provided signature against the given hash
/// @param _payloadHash the hash of the data to be signed
/// @param _proof nonce, expiry and signatures to validate
function checkProof(
bytes32 _payloadHash,
bytes calldata _proof
) public view override {
_checkProof(_payloadHash, _proof);
}
function setNextValidatorSet(
bytes calldata payload,
bytes calldata proof
) external {
// payload validation
if (bytes4(payload) != Actions.NEW_VALSET) {
revert UnexpectedAction(bytes4(payload));
}
Actions.ValSetAction memory action = Actions.validateValSet(
payload[4:]
);
ConsortiumStorage storage $ = _getConsortiumStorage();
// check proof
bytes32 payloadHash = sha256(payload);
checkProof(payloadHash, proof);
if (action.epoch != $.epoch + 1) revert InvalidEpoch();
_setValidatorSet(
$,
action.validators,
action.weights,
action.weightThreshold,
action.epoch
);
}
/// GETTERS ///
/// @notice Returns the validator for a given epoch
/// @param epoch the epoch to get the threshold for
function getValidatorSet(
uint256 epoch
) external view returns (ValidatorSet memory) {
return _getConsortiumStorage().validatorSet[epoch];
}
/// @notice Returns the current epoch
function curEpoch() external view returns (uint256) {
return _getConsortiumStorage().epoch;
}
/// PRIVATE FUNCTIONS ///
/// @notice Internal initializer for the consortium
function __Consortium_init() internal onlyInitializing {}
function _setValidatorSet(
ConsortiumStorage storage $,
address[] memory _validators,
uint256[] memory _weights,
uint256 _threshold,
uint256 _epoch
) internal {
// do not allow to rewrite existing valset
if ($.validatorSet[_epoch].weightThreshold != 0) {
revert InvalidEpoch();
}
$.epoch = _epoch;
$.validatorSet[_epoch] = ValidatorSet({
validators: _validators,
weights: _weights,
weightThreshold: _threshold
});
emit ValidatorSetUpdated(_epoch, _validators, _weights, _threshold);
}
/// @dev Checks that `_proof` is correct
/// @param _payloadHash data to be signed
/// @param _proof encoding of signatures array
/// @dev Negative weight means that the validator did not sign, any positive weight means that the validator signed
function _checkProof(
bytes32 _payloadHash,
bytes calldata _proof
) internal view virtual {
ConsortiumStorage storage $ = _getConsortiumStorage();
if ($.epoch == 0) {
revert NoValidatorSet();
}
// decode proof
bytes[] memory signatures = abi.decode(_proof, (bytes[]));
address[] storage validators = $.validatorSet[$.epoch].validators;
uint256 length = validators.length;
if (signatures.length != length) {
revert LengthMismatch();
}
uint256 weight = 0;
uint256[] storage weights = $.validatorSet[$.epoch].weights;
for (uint256 i; i < length; ++i) {
// each signature preset R || S values
// V is missed, because validators use Cosmos SDK keyring which is not signing in eth style
// We only check signatures which are the expected 64 bytes long - we are expecting
// a signatures array with the same amount of items as there are validators, but not all
// validators will need to sign for a proof to be valid, so validators who have not signed
// will have their corresponding signature set to 0 bytes.
// In case of a malformed signature (i.e. length isn't 0 bytes but also isn't 64 bytes)
// this signature will be discarded.
if (signatures[i].length == 64) {
// split signature by R and S values
bytes memory sig = signatures[i];
bytes32 r;
bytes32 s;
// load the first 32 bytes (r) and the second 32 bytes (s) from the sig
assembly {
r := mload(add(sig, 0x20)) // first 32 bytes (offset 0x20)
s := mload(add(sig, 0x40)) // next 32 bytes (offset 0x40)
}
if (r != bytes32(0) && s != bytes32(0)) {
// try recover with V = 27
(address signer, ECDSA.RecoverError err, ) = ECDSA
.tryRecover(_payloadHash, 27, r, s);
// ignore if bad signature
if (err != ECDSA.RecoverError.NoError) {
continue;
}
// if signer doesn't match try V = 28
if (signer != validators[i]) {
(signer, err, ) = ECDSA.tryRecover(
_payloadHash,
28,
r,
s
);
if (err != ECDSA.RecoverError.NoError) {
continue;
}
if (signer != validators[i]) {
continue;
}
}
// signature accepted
unchecked {
weight += weights[i];
}
}
}
}
if (weight < $.validatorSet[$.epoch].weightThreshold) {
revert NotEnoughSignatures();
}
}
/// @notice Retrieve the ConsortiumStorage struct from the specific storage slot
function _getConsortiumStorage()
private
pure
returns (ConsortiumStorage storage $)
{
assembly {
$.slot := CONSORTIUM_STORAGE_LOCATION
}
}
}// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
interface INotaryConsortium {
/// @dev Error thrown when signature payload is already used
error PayloadAlreadyUsed();
/// @dev Error thrown when signatures length is not equal to signers length
error LengthMismatch();
/// @dev Error thrown when there are not enough signatures
error NotEnoughSignatures();
/// @dev Error thrown when unexpected action is used
error UnexpectedAction(bytes4 action);
/// @dev Event emitted when the validator set is updated
event ValidatorSetUpdated(
uint256 indexed epoch,
address[] validators,
uint256[] weights,
uint256 threshold
);
/// @dev Error thrown when validator set already set
error ValSetAlreadySet();
/// @dev Error thrown when no validator set is set
error NoValidatorSet();
/// @dev Error thrown when invalid epoch is provided
error InvalidEpoch();
function checkProof(
bytes32 _payloadHash,
bytes calldata _proof
) external view;
}// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
interface ILBTC {
error ZeroAddress();
error ZeroContractHash();
error ZeroChainId();
error WithdrawalsDisabled();
error KnownDestination();
error UnknownDestination();
error ScriptPubkeyUnsupported();
error AmountLessThanCommission(uint256 fee);
error AmountBelowDustLimit(uint256 dustLimit);
error InvalidDustFeeRate();
error UnauthorizedAccount(address account);
error UnexpectedAction(bytes4 action);
error InvalidUserSignature();
error PayloadAlreadyUsed();
error InvalidInputLength();
error InvalidMintAmount();
event PauserRoleTransferred(
address indexed previousPauser,
address indexed newPauser
);
event OperatorRoleTransferred(
address indexed previousOperator,
address indexed newOperator
);
event UnstakeRequest(
address indexed fromAddress,
bytes scriptPubKey,
uint256 amount
);
event WithdrawalsEnabled(bool);
event NameAndSymbolChanged(string name, string symbol);
event ConsortiumChanged(address indexed prevVal, address indexed newVal);
event TreasuryAddressChanged(
address indexed prevValue,
address indexed newValue
);
event BurnCommissionChanged(
uint64 indexed prevValue,
uint64 indexed newValue
);
event DustFeeRateChanged(uint256 indexed oldRate, uint256 indexed newRate);
event BasculeChanged(address indexed prevVal, address indexed newVal);
event MinterUpdated(address indexed minter, bool isMinter);
event BridgeChanged(address indexed prevVal, address indexed newVal);
event ClaimerUpdated(address indexed claimer, bool isClaimer);
event FeeCharged(uint256 indexed fee, bytes userSignature);
event FeeChanged(uint256 indexed oldFee, uint256 indexed newFee);
error FeeGreaterThanAmount();
event MintProofConsumed(
address indexed recipient,
bytes32 indexed payloadHash,
bytes payload
);
event BatchMintSkipped(bytes32 indexed payloadHash, bytes payload);
function burn(uint256 amount) external;
function burn(address from, uint256 amount) external;
function mint(address to, uint256 amount) external;
}// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
library Actions {
struct DepositBtcAction {
uint256 toChain;
address recipient;
uint256 amount;
bytes32 txid;
uint32 vout;
}
struct DepositBridgeAction {
uint256 fromChain;
bytes32 fromContract;
uint256 toChain;
address toContract;
address recipient;
uint64 amount;
uint256 nonce;
}
struct ValSetAction {
uint256 epoch;
address[] validators;
uint256[] weights;
uint256 weightThreshold;
uint256 height;
}
struct FeeApprovalAction {
uint256 fee;
uint256 expiry;
}
/// @dev Error thrown when invalid public key is provided
error InvalidPublicKey(bytes pubKey);
/// @dev Error thrown when signatures length is not equal to signers length
error Actions_LengthMismatch();
/// @dev Error thrown when threshold is invalid
error InvalidThreshold();
/// @dev Error thrown when validator set size is invalid
error InvalidValidatorSetSize();
/// @dev Error thrown when zero validator is provided
error ZeroValidator();
/// @dev Error thrown when wrong chain id is provided
error WrongChainId();
/// @dev Error thrown when wrong contract is provided
error WrongContract();
/// @dev Error thrown when zero address is provided
error Actions_ZeroAddress();
/// @dev Error thrown when zero amount is provided
error ZeroAmount();
/// @dev Error thrown when zero weight is provided
error ZeroWeight();
/// @dev Error thrown when fee approval is expired
error UserSignatureExpired(uint256 expiry);
/// @dev Error thrown when amount is below fee
error NotEnoughAmountToUseApproval();
/// @dev Error thrown when zero fee is used
error ZeroFee();
/// @dev Error thrown when payload length is too big
error PayloadTooLarge();
// bytes4(keccak256("feeApproval(uint256,uint256)"))
bytes4 internal constant FEE_APPROVAL_ACTION = 0x8175ca94;
// keccak256("feeApproval(uint256 chainId,uint256 fee,uint256 expiry)")
bytes32 internal constant FEE_APPROVAL_EIP712_ACTION =
0x40ac9f6aa27075e64c1ed1ea2e831b20b8c25efdeb6b79fd0cf683c9a9c50725;
// bytes4(keccak256("payload(bytes32,bytes32,uint64,bytes32,uint32)"))
bytes4 internal constant DEPOSIT_BTC_ACTION = 0xf2e73f7c;
// bytes4(keccak256("payload(bytes32,bytes32,bytes32,bytes32,bytes32,uint64,uint256)"))
bytes4 internal constant DEPOSIT_BRIDGE_ACTION = 0x5c70a505;
// bytes4(keccak256("payload(uint256,bytes[],uint256[],uint256,uint256)"))
bytes4 internal constant NEW_VALSET = 0x4aab1d6f;
/// @dev Maximum number of validators allowed in the consortium.
/// @notice This value is determined by the minimum of CometBFT consensus limitations and gas considerations:
/// - CometBFT has a hard limit of 10,000 validators (https://docs.cometbft.com/v0.38/spec/core/state)
/// - Gas-based calculation:
/// - Assumes 4281 gas per ECDSA signature verification
/// - Uses a conservative 30 million gas block limit
/// - Maximum possible signatures: 30,000,000 / 4,281 ≈ 7007
/// - Reverse calculated for BFT consensus (2/3 + 1):
/// 7,007 = (10,509 * 2/3 + 1) rounded down
/// - The lower value of 10,000 (CometBFT limit) and 10,509 (gas calculation) is chosen
/// @dev This limit ensures compatibility with CometBFT while also considering gas limitations
/// for signature verification within a single block.
uint256 private constant MAX_VALIDATOR_SET_SIZE = 102;
/// @dev Minimum number of validators allowed in the system.
/// @notice While set to 1 to allow for non-distributed scenarios, this configuration
/// does not provide Byzantine fault tolerance. For a truly distributed and
/// fault-tolerant system, a minimum of 4 validators would be recommended to tolerate
/// at least one Byzantine fault.
uint256 private constant MIN_VALIDATOR_SET_SIZE = 1;
/// @dev A constant representing the number of bytes for a slot of information in a payload.
uint256 internal constant ABI_SLOT_SIZE = 32;
/**
* @notice Returns decoded deposit btc msg
* @dev Message should not contain the selector
* @param payload Body of the mint payload
*/
function depositBtc(
bytes memory payload
) internal view returns (DepositBtcAction memory) {
if (payload.length != ABI_SLOT_SIZE * 5) revert PayloadTooLarge();
(
uint256 toChain,
address recipient,
uint256 amount,
bytes32 txid,
uint32 vout
) = abi.decode(payload, (uint256, address, uint256, bytes32, uint32));
if (toChain != block.chainid) {
revert WrongChainId();
}
if (recipient == address(0)) {
revert Actions_ZeroAddress();
}
if (amount == 0) {
revert ZeroAmount();
}
return DepositBtcAction(toChain, recipient, amount, txid, vout);
}
/**
* @notice Returns decoded bridge payload
* @dev Payload should not contain the selector
* @param payload Body of the burn payload
*/
function depositBridge(
bytes memory payload
) internal view returns (DepositBridgeAction memory) {
if (payload.length != ABI_SLOT_SIZE * 7) revert PayloadTooLarge();
(
uint256 fromChain,
bytes32 fromContract,
uint256 toChain,
address toContract,
address recipient,
uint64 amount,
uint256 nonce
) = abi.decode(
payload,
(uint256, bytes32, uint256, address, address, uint64, uint256)
);
if (toChain != block.chainid) {
revert WrongChainId();
}
if (recipient == address(0)) {
revert Actions_ZeroAddress();
}
if (amount == 0) {
revert ZeroAmount();
}
return
DepositBridgeAction(
fromChain,
fromContract,
toChain,
toContract,
recipient,
amount,
nonce
);
}
/**
* @notice Returns decoded validator set
* @dev Payload should not contain the selector
* @param payload Body of the set validators set payload
*/
function validateValSet(
bytes memory payload
) internal pure returns (ValSetAction memory) {
(
uint256 epoch,
bytes[] memory pubKeys,
uint256[] memory weights,
uint256 weightThreshold,
uint256 height
) = abi.decode(
payload,
(uint256, bytes[], uint256[], uint256, uint256)
);
// Since dynamic arrays can variably insert more slots of data for things such as data length,
// offset etc., we will just encode the received variables again and check for a length match.
bytes memory reEncodedPayload = abi.encode(
epoch,
pubKeys,
weights,
weightThreshold,
height
);
if (reEncodedPayload.length != payload.length) revert PayloadTooLarge();
if (
pubKeys.length < MIN_VALIDATOR_SET_SIZE ||
pubKeys.length > MAX_VALIDATOR_SET_SIZE
) revert InvalidValidatorSetSize();
if (pubKeys.length != weights.length) revert Actions_LengthMismatch();
if (weightThreshold == 0) revert InvalidThreshold();
uint256 sum = 0;
for (uint256 i; i < weights.length; ) {
if (weights[i] == 0) {
revert ZeroWeight();
}
sum += weights[i];
unchecked {
++i;
}
}
if (sum < weightThreshold) revert InvalidThreshold();
address[] memory validators = pubKeysToAddress(pubKeys);
return
ValSetAction(epoch, validators, weights, weightThreshold, height);
}
function pubKeysToAddress(
bytes[] memory _pubKeys
) internal pure returns (address[] memory) {
address[] memory addresses = new address[](_pubKeys.length);
for (uint256 i; i < _pubKeys.length; ) {
// each pubkey represented as uncompressed
if (_pubKeys[i].length == 65) {
bytes memory data = _pubKeys[i];
// Ensure that first byte of pubkey is 0x04
if (_pubKeys[i][0] != 0x04)
revert InvalidPublicKey(_pubKeys[i]);
// create a new array with length - 1 (excluding the first 0x04 byte)
bytes memory result = new bytes(data.length - 1);
// use inline assembly for memory manipulation
assembly {
// calculate the start of the `result` and `data` in memory
let resultData := add(result, 0x20) // points to the first byte of the result
let dataStart := add(data, 0x21) // points to the second byte of data (skip 0x04)
// copy 64 bytes from input (excluding the first byte) to result
mstore(resultData, mload(dataStart)) // copy the first 32 bytes
mstore(add(resultData, 0x20), mload(add(dataStart, 0x20))) // copy the next 32 bytes
}
addresses[i] = address(uint160(uint256(keccak256(result))));
} else {
revert InvalidPublicKey(_pubKeys[i]);
}
unchecked {
++i;
}
}
return addresses;
}
/**
* @notice Returns decoded fee approval
* @dev Payload should not contain the selector
* @param payload Body of the fee approval payload
*/
function feeApproval(
bytes memory payload
) internal view returns (FeeApprovalAction memory) {
if (payload.length != ABI_SLOT_SIZE * 2) revert PayloadTooLarge();
(uint256 fee, uint256 expiry) = abi.decode(payload, (uint256, uint256));
if (block.timestamp > expiry) {
revert UserSignatureExpired(expiry);
}
if (fee == 0) {
revert ZeroFee();
}
return FeeApprovalAction(fee, expiry);
}
}// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
enum OutputType {
UNSUPPORTED,
P2TR,
P2WPKH,
P2WSH
}
bytes1 constant OP_0 = 0x00;
bytes1 constant OP_1 = 0x51;
bytes1 constant OP_DATA_32 = 0x20;
bytes1 constant OP_DATA_20 = 0x14;
uint256 constant BASE_SPEND_COST = 49; // 32 (txid) + 4 (vout) + 1 (scriptSig size) + 4 (nSequence) + 8 (amount)
// Size of inputs spending different output types
uint256 constant NON_WITNESS_INPUT_SIZE = 107; // Used for non-witness outputs (P2PKH, P2SH)
uint256 constant WITNESS_INPUT_SIZE = 26; // floor(107 / 4), used for witness outputs (P2WPKH, P2WSH, P2TR)
library BitcoinUtils {
uint256 public constant DEFAULT_DUST_FEE_RATE = 3000; // Default value - 3 satoshis per byte
function getOutputType(
bytes calldata scriptPubkey
) internal pure returns (OutputType) {
if (
scriptPubkey.length == 22 &&
scriptPubkey[0] == OP_0 &&
scriptPubkey[1] == OP_DATA_20
) {
return OutputType.P2WPKH;
}
if (
scriptPubkey.length == 34 &&
scriptPubkey[0] == OP_1 &&
scriptPubkey[1] == OP_DATA_32
) {
return OutputType.P2TR;
}
if (
scriptPubkey.length == 34 &&
scriptPubkey[0] == OP_0 &&
scriptPubkey[1] == OP_DATA_32
) {
return OutputType.P2WSH;
}
return OutputType.UNSUPPORTED;
}
/// @notice Compute the dust limit for a given Bitcoin script public key
/// @dev The dust limit is the minimum payment to an address that is considered
/// spendable under consensus rules. This function is based on Bitcoin Core's
/// implementation.
/// @param scriptPubkey The Bitcoin script public key as a byte array
/// @param dustFeeRate The current dust fee rate (in satoshis per 1000 bytes)
/// @return dustLimit The calculated dust limit in satoshis
/// @custom:reference https://github.com/bitcoin/bitcoin/blob/43740f4971f45cd5499470b6a085b3ecd8b96d28/src/policy/policy.cpp#L54
function getDustLimitForOutput(
OutputType outType,
bytes calldata scriptPubkey,
uint256 dustFeeRate
) internal pure returns (uint256 dustLimit) {
uint256 spendCost = BASE_SPEND_COST;
if (
outType == OutputType.P2TR ||
outType == OutputType.P2WPKH ||
outType == OutputType.P2WSH
) {
// witness v0 and v1 has a cheaper payment formula
spendCost += WITNESS_INPUT_SIZE;
// The current addition creates a discrepancy of 1, and our final value should be 98 bytes.
// Thus, we add 1 here.
spendCost += 1;
} else {
spendCost += NON_WITNESS_INPUT_SIZE;
}
spendCost += scriptPubkey.length;
// Calculate dust limit
dustLimit = Math.ceilDiv(spendCost * dustFeeRate, 1000);
}
}// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
import {IERC1271} from "@openzeppelin/contracts/interfaces/IERC1271.sol";
import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
/**
* @title Library of utilities for making EIP1271-compliant signature checks.
* @author Lombard.Finance
* @notice The contracts is a part of Lombard.Finace protocol
*/
library EIP1271SignatureUtils {
// bytes4(keccak256("isValidSignature(bytes32,bytes)")
bytes4 internal constant EIP1271_MAGICVALUE = 0x1626ba7e;
bytes4 internal constant EIP1271_WRONGVALUE = 0xffffffff;
/**
* @notice Checks @param signature is a valid signature of @param digest from @param signer.
* If the `signer` contains no code -- i.e. it is not (yet, at least) a contract address, then checks using standard ECDSA logic
* Otherwise, passes on the signature to the signer to verify the signature and checks that it returns the `EIP1271_MAGICVALUE`.
*/
function checkSignature(
address signer,
bytes32 digest,
bytes memory signature
) internal view returns (bool) {
if (signer.code.length != 0) {
if (
IERC1271(signer).isValidSignature(digest, signature) !=
EIP1271_MAGICVALUE
) {
return false;
}
} else {
if (ECDSA.recover(digest, signature) != signer) {
return false;
}
}
return true;
}
}// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
library FeeUtils {
uint256 constant MAX_COMMISSION = 10000; // 100%
error AmountTooSmallToPayRelativeFee();
error BadCommission();
function calcRelativeFee(
uint256 amount,
uint16 relativeComs
) internal pure returns (uint256) {
return
Math.mulDiv(
amount,
relativeComs,
MAX_COMMISSION,
Math.Rounding.Ceil
);
}
function getRelativeFee(
uint256 amount,
uint16 relativeComs
) internal pure returns (uint256) {
if (amount < relativeComs) revert AmountTooSmallToPayRelativeFee();
return calcRelativeFee(amount, relativeComs);
}
function validateCommission(uint16 commission) internal pure {
if (commission >= MAX_COMMISSION) revert BadCommission();
}
}{
"optimizer": {
"enabled": true,
"runs": 200
},
"evmVersion": "paris",
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"metadata": {
"useLiteralContent": true
},
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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lType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOperator","type":"address"}],"name":"transferOperatorRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newPauser","type":"address"}],"name":"transferPauserRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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Multichain Portfolio | 31 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.