// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;

/// @title IProxy - Helper interface to access masterCopy of the Proxy on-chain
/// @author Richard Meissner - <[email protected]>
interface IProxy {
    function masterCopy() external view returns (address);
}

/// @title GnosisSafeProxy - Generic proxy contract allows to execute all transactions applying the code of a master contract.
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract GnosisSafeProxy {
    // singleton always needs to be first declared variable, to ensure that it is at the same location in the contracts to which calls are delegated.
    // To reduce deployment costs this variable is internal and needs to be retrieved via `getStorageAt`
    address internal singleton;

    /// @dev Constructor function sets address of singleton contract.
    /// @param _singleton Singleton address.
    constructor(address _singleton) {
        require(_singleton != address(0), "Invalid singleton address provided");
        singleton = _singleton;
    }

    /// @dev Fallback function forwards all transactions and returns all received return data.
    fallback() external payable {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let _singleton := and(sload(0), 0xffffffffffffffffffffffffffffffffffffffff)
            // 0xa619486e == keccak("masterCopy()"). The value is right padded to 32-bytes with 0s
            if eq(calldataload(0), 0xa619486e00000000000000000000000000000000000000000000000000000000) {
                mstore(0, _singleton)
                return(0, 0x20)
            }
            calldatacopy(0, 0, calldatasize())
            let success := delegatecall(gas(), _singleton, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())
            if eq(success, 0) {
                revert(0, returndatasize())
            }
            return(0, returndatasize())
        }
    }
}

/// @title Proxy Factory - Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
/// @author Stefan George - <[email protected]>
contract GnosisSafeProxyFactory {
    event ProxyCreation(GnosisSafeProxy proxy, address singleton);

    /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
    /// @param singleton Address of singleton contract.
    /// @param data Payload for message call sent to new proxy contract.
    function createProxy(address singleton, bytes memory data) public returns (GnosisSafeProxy proxy) {
        proxy = new GnosisSafeProxy(singleton);
        if (data.length > 0)
            // solhint-disable-next-line no-inline-assembly
            assembly {
                if eq(call(gas(), proxy, 0, add(data, 0x20), mload(data), 0, 0), 0) {
                    revert(0, 0)
                }
            }
        emit ProxyCreation(proxy, singleton);
    }

    /// @dev Allows to retrieve the runtime code of a deployed Proxy. This can be used to check that the expected Proxy was deployed.
    function proxyRuntimeCode() public pure returns (bytes memory) {
        return type(GnosisSafeProxy).runtimeCode;
    }

    /// @dev Allows to retrieve the creation code used for the Proxy deployment. With this it is easily possible to calculate predicted address.
    function proxyCreationCode() public pure returns (bytes memory) {
        return type(GnosisSafeProxy).creationCode;
    }

    /// @dev Allows to create new proxy contact using CREATE2 but it doesn't run the initializer.
    ///      This method is only meant as an utility to be called from other methods
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function deployProxyWithNonce(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce
    ) internal returns (GnosisSafeProxy proxy) {
        // If the initializer changes the proxy address should change too. Hashing the initializer data is cheaper than just concatinating it
        bytes32 salt = keccak256(abi.encodePacked(keccak256(initializer), saltNonce));
        bytes memory deploymentData = abi.encodePacked(type(GnosisSafeProxy).creationCode, uint256(uint160(_singleton)));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            proxy := create2(0x0, add(0x20, deploymentData), mload(deploymentData), salt)
        }
        require(address(proxy) != address(0), "Create2 call failed");
    }

    /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function createProxyWithNonce(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce
    ) public returns (GnosisSafeProxy proxy) {
        proxy = deployProxyWithNonce(_singleton, initializer, saltNonce);
        if (initializer.length > 0)
            // solhint-disable-next-line no-inline-assembly
            assembly {
                if eq(call(gas(), proxy, 0, add(initializer, 0x20), mload(initializer), 0, 0), 0) {
                    revert(0, 0)
                }
            }
        emit ProxyCreation(proxy, _singleton);
    }

    /// @dev Allows to create new proxy contact, execute a message call to the new proxy and call a specified callback within one transaction
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    /// @param callback Callback that will be invoced after the new proxy contract has been successfully deployed and initialized.
    function createProxyWithCallback(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce,
        IProxyCreationCallback callback
    ) public returns (GnosisSafeProxy proxy) {
        uint256 saltNonceWithCallback = uint256(keccak256(abi.encodePacked(saltNonce, callback)));
        proxy = createProxyWithNonce(_singleton, initializer, saltNonceWithCallback);
        if (address(callback) != address(0)) callback.proxyCreated(proxy, _singleton, initializer, saltNonce);
    }

    /// @dev Allows to get the address for a new proxy contact created via `createProxyWithNonce`
    ///      This method is only meant for address calculation purpose when you use an initializer that would revert,
    ///      therefore the response is returned with a revert. When calling this method set `from` to the address of the proxy factory.
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function calculateCreateProxyWithNonceAddress(
        address _singleton,
        bytes calldata initializer,
        uint256 saltNonce
    ) external returns (GnosisSafeProxy proxy) {
        proxy = deployProxyWithNonce(_singleton, initializer, saltNonce);
        revert(string(abi.encodePacked(proxy)));
    }
}

interface IProxyCreationCallback {
    function proxyCreated(
        GnosisSafeProxy proxy,
        address _singleton,
        bytes calldata initializer,
        uint256 saltNonce
    ) external;
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "./base/ModuleManager.sol";
import "./base/OwnerManager.sol";
import "./base/FallbackManager.sol";
import "./base/GuardManager.sol";
import "./common/EtherPaymentFallback.sol";
import "./common/Singleton.sol";
import "./common/SignatureDecoder.sol";
import "./common/SecuredTokenTransfer.sol";
import "./common/StorageAccessible.sol";
import "./interfaces/ISignatureValidator.sol";
import "./external/GnosisSafeMath.sol";
/// @title Gnosis Safe - A multisignature wallet with support for confirmations using signed messages based on ERC191.
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract GnosisSafe is
    EtherPaymentFallback,
    Singleton,
    ModuleManager,
    OwnerManager,
    SignatureDecoder,
    SecuredTokenTransfer,
    ISignatureValidatorConstants,
    FallbackManager,
    StorageAccessible,
    GuardManager
{
    using GnosisSafeMath for uint256;
    string public constant VERSION = "1.3.0";
    // keccak256(
    //     "EIP712Domain(uint256 chainId,address verifyingContract)"
    // );
    bytes32 private constant DOMAIN_SEPARATOR_TYPEHASH = 0x47e79534a245952e8b16893a336b85a3d9ea9fa8c573f3d803afb92a79469218;
    // keccak256(
    //     "SafeTx(address to,uint256 value,bytes data,uint8 operation,uint256 safeTxGas,uint256 baseGas,uint256 gasPrice,address gasToken,address refundReceiver,uint256 nonce)"
    // );
    bytes32 private constant SAFE_TX_TYPEHASH = 0xbb8310d486368db6bd6f849402fdd73ad53d316b5a4b2644ad6efe0f941286d8;
    event SafeSetup(address indexed initiator, address[] owners, uint256 threshold, address initializer, address fallbackHandler);
    event ApproveHash(bytes32 indexed approvedHash, address indexed owner);
    event SignMsg(bytes32 indexed msgHash);
    event ExecutionFailure(bytes32 txHash, uint256 payment);
    event ExecutionSuccess(bytes32 txHash, uint256 payment);
    uint256 public nonce;
    bytes32 private _deprecatedDomainSeparator;
    // Mapping to keep track of all message hashes that have been approve by ALL REQUIRED owners
    mapping(bytes32 => uint256) public signedMessages;
    // Mapping to keep track of all hashes (message or transaction) that have been approve by ANY owners
    mapping(address => mapping(bytes32 => uint256)) public approvedHashes;
    // This constructor ensures that this contract can only be used as a master copy for Proxy contracts
    constructor() {
        // By setting the threshold it is not possible to call setup anymore,
        // so we create a Safe with 0 owners and threshold 1.
        // This is an unusable Safe, perfect for the singleton
        threshold = 1;
    }
    /// @dev Setup function sets initial storage of contract.
    /// @param _owners List of Safe owners.
    /// @param _threshold Number of required confirmations for a Safe transaction.
    /// @param to Contract address for optional delegate call.
    /// @param data Data payload for optional delegate call.
    /// @param fallbackHandler Handler for fallback calls to this contract
    /// @param paymentToken Token that should be used for the payment (0 is ETH)
    /// @param payment Value that should be paid
    /// @param paymentReceiver Adddress that should receive the payment (or 0 if tx.origin)
    function setup(
        address[] calldata _owners,
        uint256 _threshold,
        address to,
        bytes calldata data,
        address fallbackHandler,
        address paymentToken,
        uint256 payment,
        address payable paymentReceiver
    ) external {
        // setupOwners checks if the Threshold is already set, therefore preventing that this method is called twice
        setupOwners(_owners, _threshold);
        if (fallbackHandler != address(0)) internalSetFallbackHandler(fallbackHandler);
        // As setupOwners can only be called if the contract has not been initialized we don't need a check for setupModules
        setupModules(to, data);
        if (payment > 0) {
            // To avoid running into issues with EIP-170 we reuse the handlePayment function (to avoid adjusting code of that has been verified we do not adjust the method itself)
            // baseGas = 0, gasPrice = 1 and gas = payment => amount = (payment + 0) * 1 = payment
            handlePayment(payment, 0, 1, paymentToken, paymentReceiver);
        }
        emit SafeSetup(msg.sender, _owners, _threshold, to, fallbackHandler);
    }
    /// @dev Allows to execute a Safe transaction confirmed by required number of owners and then pays the account that submitted the transaction.
    ///      Note: The fees are always transferred, even if the user transaction fails.
    /// @param to Destination address of Safe transaction.
    /// @param value Ether value of Safe transaction.
    /// @param data Data payload of Safe transaction.
    /// @param operation Operation type of Safe transaction.
    /// @param safeTxGas Gas that should be used for the Safe transaction.
    /// @param baseGas Gas costs that are independent of the transaction execution(e.g. base transaction fee, signature check, payment of the refund)
    /// @param gasPrice Gas price that should be used for the payment calculation.
    /// @param gasToken Token address (or 0 if ETH) that is used for the payment.
    /// @param refundReceiver Address of receiver of gas payment (or 0 if tx.origin).
    /// @param signatures Packed signature data ({bytes32 r}{bytes32 s}{uint8 v})
    function execTransaction(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address payable refundReceiver,
        bytes memory signatures
    ) public payable virtual returns (bool success) {
        bytes32 txHash;
        // Use scope here to limit variable lifetime and prevent `stack too deep` errors
        {
            bytes memory txHashData =
                encodeTransactionData(
                    // Transaction info
                    to,
                    value,
                    data,
                    operation,
                    safeTxGas,
                    // Payment info
                    baseGas,
                    gasPrice,
                    gasToken,
                    refundReceiver,
                    // Signature info
                    nonce
                );
            // Increase nonce and execute transaction.
            nonce++;
            txHash = keccak256(txHashData);
            checkSignatures(txHash, txHashData, signatures);
        }
        address guard = getGuard();
        {
            if (guard != address(0)) {
                Guard(guard).checkTransaction(
                    // Transaction info
                    to,
                    value,
                    data,
                    operation,
                    safeTxGas,
                    // Payment info
                    baseGas,
                    gasPrice,
                    gasToken,
                    refundReceiver,
                    // Signature info
                    signatures,
                    msg.sender
                );
            }
        }
        // We require some gas to emit the events (at least 2500) after the execution and some to perform code until the execution (500)
        // We also include the 1/64 in the check that is not send along with a call to counteract potential shortings because of EIP-150
        require(gasleft() >= ((safeTxGas * 64) / 63).max(safeTxGas + 2500) + 500, "GS010");
        // Use scope here to limit variable lifetime and prevent `stack too deep` errors
        {
            uint256 gasUsed = gasleft();
            // If the gasPrice is 0 we assume that nearly all available gas can be used (it is always more than safeTxGas)
            // We only substract 2500 (compared to the 3000 before) to ensure that the amount passed is still higher than safeTxGas
            success = execute(to, value, data, operation, gasPrice == 0 ? (gasleft() - 2500) : safeTxGas);
            gasUsed = gasUsed.sub(gasleft());
            // If no safeTxGas and no gasPrice was set (e.g. both are 0), then the internal tx is required to be successful
            // This makes it possible to use `estimateGas` without issues, as it searches for the minimum gas where the tx doesn't revert
            require(success || safeTxGas != 0 || gasPrice != 0, "GS013");
            // We transfer the calculated tx costs to the tx.origin to avoid sending it to intermediate contracts that have made calls
            uint256 payment = 0;
            if (gasPrice > 0) {
                payment = handlePayment(gasUsed, baseGas, gasPrice, gasToken, refundReceiver);
            }
            if (success) emit ExecutionSuccess(txHash, payment);
            else emit ExecutionFailure(txHash, payment);
        }
        {
            if (guard != address(0)) {
                Guard(guard).checkAfterExecution(txHash, success);
            }
        }
    }
    function handlePayment(
        uint256 gasUsed,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address payable refundReceiver
    ) private returns (uint256 payment) {
        // solhint-disable-next-line avoid-tx-origin
        address payable receiver = refundReceiver == address(0) ? payable(tx.origin) : refundReceiver;
        if (gasToken == address(0)) {
            // For ETH we will only adjust the gas price to not be higher than the actual used gas price
            payment = gasUsed.add(baseGas).mul(gasPrice < tx.gasprice ? gasPrice : tx.gasprice);
            require(receiver.send(payment), "GS011");
        } else {
            payment = gasUsed.add(baseGas).mul(gasPrice);
            require(transferToken(gasToken, receiver, payment), "GS012");
        }
    }
    /**
     * @dev Checks whether the signature provided is valid for the provided data, hash. Will revert otherwise.
     * @param dataHash Hash of the data (could be either a message hash or transaction hash)
     * @param data That should be signed (this is passed to an external validator contract)
     * @param signatures Signature data that should be verified. Can be ECDSA signature, contract signature (EIP-1271) or approved hash.
     */
    function checkSignatures(
        bytes32 dataHash,
        bytes memory data,
        bytes memory signatures
    ) public view {
        // Load threshold to avoid multiple storage loads
        uint256 _threshold = threshold;
        // Check that a threshold is set
        require(_threshold > 0, "GS001");
        checkNSignatures(dataHash, data, signatures, _threshold);
    }
    /**
     * @dev Checks whether the signature provided is valid for the provided data, hash. Will revert otherwise.
     * @param dataHash Hash of the data (could be either a message hash or transaction hash)
     * @param data That should be signed (this is passed to an external validator contract)
     * @param signatures Signature data that should be verified. Can be ECDSA signature, contract signature (EIP-1271) or approved hash.
     * @param requiredSignatures Amount of required valid signatures.
     */
    function checkNSignatures(
        bytes32 dataHash,
        bytes memory data,
        bytes memory signatures,
        uint256 requiredSignatures
    ) public view {
        // Check that the provided signature data is not too short
        require(signatures.length >= requiredSignatures.mul(65), "GS020");
        // There cannot be an owner with address 0.
        address lastOwner = address(0);
        address currentOwner;
        uint8 v;
        bytes32 r;
        bytes32 s;
        uint256 i;
        for (i = 0; i < requiredSignatures; i++) {
            (v, r, s) = signatureSplit(signatures, i);
            if (v == 0) {
                // If v is 0 then it is a contract signature
                // When handling contract signatures the address of the contract is encoded into r
                currentOwner = address(uint160(uint256(r)));
                // Check that signature data pointer (s) is not pointing inside the static part of the signatures bytes
                // This check is not completely accurate, since it is possible that more signatures than the threshold are send.
                // Here we only check that the pointer is not pointing inside the part that is being processed
                require(uint256(s) >= requiredSignatures.mul(65), "GS021");
                // Check that signature data pointer (s) is in bounds (points to the length of data -> 32 bytes)
                require(uint256(s).add(32) <= signatures.length, "GS022");
                // Check if the contract signature is in bounds: start of data is s + 32 and end is start + signature length
                uint256 contractSignatureLen;
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    contractSignatureLen := mload(add(add(signatures, s), 0x20))
                }
                require(uint256(s).add(32).add(contractSignatureLen) <= signatures.length, "GS023");
                // Check signature
                bytes memory contractSignature;
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    // The signature data for contract signatures is appended to the concatenated signatures and the offset is stored in s
                    contractSignature := add(add(signatures, s), 0x20)
                }
                require(ISignatureValidator(currentOwner).isValidSignature(data, contractSignature) == EIP1271_MAGIC_VALUE, "GS024");
            } else if (v == 1) {
                // If v is 1 then it is an approved hash
                // When handling approved hashes the address of the approver is encoded into r
                currentOwner = address(uint160(uint256(r)));
                // Hashes are automatically approved by the sender of the message or when they have been pre-approved via a separate transaction
                require(msg.sender == currentOwner || approvedHashes[currentOwner][dataHash] != 0, "GS025");
            } else if (v > 30) {
                // If v > 30 then default va (27,28) has been adjusted for eth_sign flow
                // To support eth_sign and similar we adjust v and hash the messageHash with the Ethereum message prefix before applying ecrecover
                currentOwner = ecrecover(keccak256(abi.encodePacked("\\x19Ethereum Signed Message:\
32", dataHash)), v - 4, r, s);
            } else {
                // Default is the ecrecover flow with the provided data hash
                // Use ecrecover with the messageHash for EOA signatures
                currentOwner = ecrecover(dataHash, v, r, s);
            }
            require(currentOwner > lastOwner && owners[currentOwner] != address(0) && currentOwner != SENTINEL_OWNERS, "GS026");
            lastOwner = currentOwner;
        }
    }
    /// @dev Allows to estimate a Safe transaction.
    ///      This method is only meant for estimation purpose, therefore the call will always revert and encode the result in the revert data.
    ///      Since the `estimateGas` function includes refunds, call this method to get an estimated of the costs that are deducted from the safe with `execTransaction`
    /// @param to Destination address of Safe transaction.
    /// @param value Ether value of Safe transaction.
    /// @param data Data payload of Safe transaction.
    /// @param operation Operation type of Safe transaction.
    /// @return Estimate without refunds and overhead fees (base transaction and payload data gas costs).
    /// @notice Deprecated in favor of common/StorageAccessible.sol and will be removed in next version.
    function requiredTxGas(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation
    ) external returns (uint256) {
        uint256 startGas = gasleft();
        // We don't provide an error message here, as we use it to return the estimate
        require(execute(to, value, data, operation, gasleft()));
        uint256 requiredGas = startGas - gasleft();
        // Convert response to string and return via error message
        revert(string(abi.encodePacked(requiredGas)));
    }
    /**
     * @dev Marks a hash as approved. This can be used to validate a hash that is used by a signature.
     * @param hashToApprove The hash that should be marked as approved for signatures that are verified by this contract.
     */
    function approveHash(bytes32 hashToApprove) external {
        require(owners[msg.sender] != address(0), "GS030");
        approvedHashes[msg.sender][hashToApprove] = 1;
        emit ApproveHash(hashToApprove, msg.sender);
    }
    /// @dev Returns the chain id used by this contract.
    function getChainId() public view returns (uint256) {
        uint256 id;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            id := chainid()
        }
        return id;
    }
    function domainSeparator() public view returns (bytes32) {
        return keccak256(abi.encode(DOMAIN_SEPARATOR_TYPEHASH, getChainId(), this));
    }
    /// @dev Returns the bytes that are hashed to be signed by owners.
    /// @param to Destination address.
    /// @param value Ether value.
    /// @param data Data payload.
    /// @param operation Operation type.
    /// @param safeTxGas Gas that should be used for the safe transaction.
    /// @param baseGas Gas costs for that are independent of the transaction execution(e.g. base transaction fee, signature check, payment of the refund)
    /// @param gasPrice Maximum gas price that should be used for this transaction.
    /// @param gasToken Token address (or 0 if ETH) that is used for the payment.
    /// @param refundReceiver Address of receiver of gas payment (or 0 if tx.origin).
    /// @param _nonce Transaction nonce.
    /// @return Transaction hash bytes.
    function encodeTransactionData(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address refundReceiver,
        uint256 _nonce
    ) public view returns (bytes memory) {
        bytes32 safeTxHash =
            keccak256(
                abi.encode(
                    SAFE_TX_TYPEHASH,
                    to,
                    value,
                    keccak256(data),
                    operation,
                    safeTxGas,
                    baseGas,
                    gasPrice,
                    gasToken,
                    refundReceiver,
                    _nonce
                )
            );
        return abi.encodePacked(bytes1(0x19), bytes1(0x01), domainSeparator(), safeTxHash);
    }
    /// @dev Returns hash to be signed by owners.
    /// @param to Destination address.
    /// @param value Ether value.
    /// @param data Data payload.
    /// @param operation Operation type.
    /// @param safeTxGas Fas that should be used for the safe transaction.
    /// @param baseGas Gas costs for data used to trigger the safe transaction.
    /// @param gasPrice Maximum gas price that should be used for this transaction.
    /// @param gasToken Token address (or 0 if ETH) that is used for the payment.
    /// @param refundReceiver Address of receiver of gas payment (or 0 if tx.origin).
    /// @param _nonce Transaction nonce.
    /// @return Transaction hash.
    function getTransactionHash(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address refundReceiver,
        uint256 _nonce
    ) public view returns (bytes32) {
        return keccak256(encodeTransactionData(to, value, data, operation, safeTxGas, baseGas, gasPrice, gasToken, refundReceiver, _nonce));
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/Enum.sol";
/// @title Executor - A contract that can execute transactions
/// @author Richard Meissner - <[email protected]>
contract Executor {
    function execute(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation,
        uint256 txGas
    ) internal returns (bool success) {
        if (operation == Enum.Operation.DelegateCall) {
            // solhint-disable-next-line no-inline-assembly
            assembly {
                success := delegatecall(txGas, to, add(data, 0x20), mload(data), 0, 0)
            }
        } else {
            // solhint-disable-next-line no-inline-assembly
            assembly {
                success := call(txGas, to, value, add(data, 0x20), mload(data), 0, 0)
            }
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/SelfAuthorized.sol";
/// @title Fallback Manager - A contract that manages fallback calls made to this contract
/// @author Richard Meissner - <[email protected]>
contract FallbackManager is SelfAuthorized {
    event ChangedFallbackHandler(address handler);
    // keccak256("fallback_manager.handler.address")
    bytes32 internal constant FALLBACK_HANDLER_STORAGE_SLOT = 0x6c9a6c4a39284e37ed1cf53d337577d14212a4870fb976a4366c693b939918d5;
    function internalSetFallbackHandler(address handler) internal {
        bytes32 slot = FALLBACK_HANDLER_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, handler)
        }
    }
    /// @dev Allows to add a contract to handle fallback calls.
    ///      Only fallback calls without value and with data will be forwarded.
    ///      This can only be done via a Safe transaction.
    /// @param handler contract to handle fallbacks calls.
    function setFallbackHandler(address handler) public authorized {
        internalSetFallbackHandler(handler);
        emit ChangedFallbackHandler(handler);
    }
    // solhint-disable-next-line payable-fallback,no-complex-fallback
    fallback() external {
        bytes32 slot = FALLBACK_HANDLER_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let handler := sload(slot)
            if iszero(handler) {
                return(0, 0)
            }
            calldatacopy(0, 0, calldatasize())
            // The msg.sender address is shifted to the left by 12 bytes to remove the padding
            // Then the address without padding is stored right after the calldata
            mstore(calldatasize(), shl(96, caller()))
            // Add 20 bytes for the address appended add the end
            let success := call(gas(), handler, 0, 0, add(calldatasize(), 20), 0, 0)
            returndatacopy(0, 0, returndatasize())
            if iszero(success) {
                revert(0, returndatasize())
            }
            return(0, returndatasize())
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/Enum.sol";
import "../common/SelfAuthorized.sol";
interface Guard {
    function checkTransaction(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address payable refundReceiver,
        bytes memory signatures,
        address msgSender
    ) external;
    function checkAfterExecution(bytes32 txHash, bool success) external;
}
/// @title Fallback Manager - A contract that manages fallback calls made to this contract
/// @author Richard Meissner - <[email protected]>
contract GuardManager is SelfAuthorized {
    event ChangedGuard(address guard);
    // keccak256("guard_manager.guard.address")
    bytes32 internal constant GUARD_STORAGE_SLOT = 0x4a204f620c8c5ccdca3fd54d003badd85ba500436a431f0cbda4f558c93c34c8;
    /// @dev Set a guard that checks transactions before execution
    /// @param guard The address of the guard to be used or the 0 address to disable the guard
    function setGuard(address guard) external authorized {
        bytes32 slot = GUARD_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, guard)
        }
        emit ChangedGuard(guard);
    }
    function getGuard() internal view returns (address guard) {
        bytes32 slot = GUARD_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            guard := sload(slot)
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/Enum.sol";
import "../common/SelfAuthorized.sol";
import "./Executor.sol";
/// @title Module Manager - A contract that manages modules that can execute transactions via this contract
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract ModuleManager is SelfAuthorized, Executor {
    event EnabledModule(address module);
    event DisabledModule(address module);
    event ExecutionFromModuleSuccess(address indexed module);
    event ExecutionFromModuleFailure(address indexed module);
    address internal constant SENTINEL_MODULES = address(0x1);
    mapping(address => address) internal modules;
    function setupModules(address to, bytes memory data) internal {
        require(modules[SENTINEL_MODULES] == address(0), "GS100");
        modules[SENTINEL_MODULES] = SENTINEL_MODULES;
        if (to != address(0))
            // Setup has to complete successfully or transaction fails.
            require(execute(to, 0, data, Enum.Operation.DelegateCall, gasleft()), "GS000");
    }
    /// @dev Allows to add a module to the whitelist.
    ///      This can only be done via a Safe transaction.
    /// @notice Enables the module `module` for the Safe.
    /// @param module Module to be whitelisted.
    function enableModule(address module) public authorized {
        // Module address cannot be null or sentinel.
        require(module != address(0) && module != SENTINEL_MODULES, "GS101");
        // Module cannot be added twice.
        require(modules[module] == address(0), "GS102");
        modules[module] = modules[SENTINEL_MODULES];
        modules[SENTINEL_MODULES] = module;
        emit EnabledModule(module);
    }
    /// @dev Allows to remove a module from the whitelist.
    ///      This can only be done via a Safe transaction.
    /// @notice Disables the module `module` for the Safe.
    /// @param prevModule Module that pointed to the module to be removed in the linked list
    /// @param module Module to be removed.
    function disableModule(address prevModule, address module) public authorized {
        // Validate module address and check that it corresponds to module index.
        require(module != address(0) && module != SENTINEL_MODULES, "GS101");
        require(modules[prevModule] == module, "GS103");
        modules[prevModule] = modules[module];
        modules[module] = address(0);
        emit DisabledModule(module);
    }
    /// @dev Allows a Module to execute a Safe transaction without any further confirmations.
    /// @param to Destination address of module transaction.
    /// @param value Ether value of module transaction.
    /// @param data Data payload of module transaction.
    /// @param operation Operation type of module transaction.
    function execTransactionFromModule(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation
    ) public virtual returns (bool success) {
        // Only whitelisted modules are allowed.
        require(msg.sender != SENTINEL_MODULES && modules[msg.sender] != address(0), "GS104");
        // Execute transaction without further confirmations.
        success = execute(to, value, data, operation, gasleft());
        if (success) emit ExecutionFromModuleSuccess(msg.sender);
        else emit ExecutionFromModuleFailure(msg.sender);
    }
    /// @dev Allows a Module to execute a Safe transaction without any further confirmations and return data
    /// @param to Destination address of module transaction.
    /// @param value Ether value of module transaction.
    /// @param data Data payload of module transaction.
    /// @param operation Operation type of module transaction.
    function execTransactionFromModuleReturnData(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation
    ) public returns (bool success, bytes memory returnData) {
        success = execTransactionFromModule(to, value, data, operation);
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Load free memory location
            let ptr := mload(0x40)
            // We allocate memory for the return data by setting the free memory location to
            // current free memory location + data size + 32 bytes for data size value
            mstore(0x40, add(ptr, add(returndatasize(), 0x20)))
            // Store the size
            mstore(ptr, returndatasize())
            // Store the data
            returndatacopy(add(ptr, 0x20), 0, returndatasize())
            // Point the return data to the correct memory location
            returnData := ptr
        }
    }
    /// @dev Returns if an module is enabled
    /// @return True if the module is enabled
    function isModuleEnabled(address module) public view returns (bool) {
        return SENTINEL_MODULES != module && modules[module] != address(0);
    }
    /// @dev Returns array of modules.
    /// @param start Start of the page.
    /// @param pageSize Maximum number of modules that should be returned.
    /// @return array Array of modules.
    /// @return next Start of the next page.
    function getModulesPaginated(address start, uint256 pageSize) external view returns (address[] memory array, address next) {
        // Init array with max page size
        array = new address[](pageSize);
        // Populate return array
        uint256 moduleCount = 0;
        address currentModule = modules[start];
        while (currentModule != address(0x0) && currentModule != SENTINEL_MODULES && moduleCount < pageSize) {
            array[moduleCount] = currentModule;
            currentModule = modules[currentModule];
            moduleCount++;
        }
        next = currentModule;
        // Set correct size of returned array
        // solhint-disable-next-line no-inline-assembly
        assembly {
            mstore(array, moduleCount)
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/SelfAuthorized.sol";
/// @title OwnerManager - Manages a set of owners and a threshold to perform actions.
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract OwnerManager is SelfAuthorized {
    event AddedOwner(address owner);
    event RemovedOwner(address owner);
    event ChangedThreshold(uint256 threshold);
    address internal constant SENTINEL_OWNERS = address(0x1);
    mapping(address => address) internal owners;
    uint256 internal ownerCount;
    uint256 internal threshold;
    /// @dev Setup function sets initial storage of contract.
    /// @param _owners List of Safe owners.
    /// @param _threshold Number of required confirmations for a Safe transaction.
    function setupOwners(address[] memory _owners, uint256 _threshold) internal {
        // Threshold can only be 0 at initialization.
        // Check ensures that setup function can only be called once.
        require(threshold == 0, "GS200");
        // Validate that threshold is smaller than number of added owners.
        require(_threshold <= _owners.length, "GS201");
        // There has to be at least one Safe owner.
        require(_threshold >= 1, "GS202");
        // Initializing Safe owners.
        address currentOwner = SENTINEL_OWNERS;
        for (uint256 i = 0; i < _owners.length; i++) {
            // Owner address cannot be null.
            address owner = _owners[i];
            require(owner != address(0) && owner != SENTINEL_OWNERS && owner != address(this) && currentOwner != owner, "GS203");
            // No duplicate owners allowed.
            require(owners[owner] == address(0), "GS204");
            owners[currentOwner] = owner;
            currentOwner = owner;
        }
        owners[currentOwner] = SENTINEL_OWNERS;
        ownerCount = _owners.length;
        threshold = _threshold;
    }
    /// @dev Allows to add a new owner to the Safe and update the threshold at the same time.
    ///      This can only be done via a Safe transaction.
    /// @notice Adds the owner `owner` to the Safe and updates the threshold to `_threshold`.
    /// @param owner New owner address.
    /// @param _threshold New threshold.
    function addOwnerWithThreshold(address owner, uint256 _threshold) public authorized {
        // Owner address cannot be null, the sentinel or the Safe itself.
        require(owner != address(0) && owner != SENTINEL_OWNERS && owner != address(this), "GS203");
        // No duplicate owners allowed.
        require(owners[owner] == address(0), "GS204");
        owners[owner] = owners[SENTINEL_OWNERS];
        owners[SENTINEL_OWNERS] = owner;
        ownerCount++;
        emit AddedOwner(owner);
        // Change threshold if threshold was changed.
        if (threshold != _threshold) changeThreshold(_threshold);
    }
    /// @dev Allows to remove an owner from the Safe and update the threshold at the same time.
    ///      This can only be done via a Safe transaction.
    /// @notice Removes the owner `owner` from the Safe and updates the threshold to `_threshold`.
    /// @param prevOwner Owner that pointed to the owner to be removed in the linked list
    /// @param owner Owner address to be removed.
    /// @param _threshold New threshold.
    function removeOwner(
        address prevOwner,
        address owner,
        uint256 _threshold
    ) public authorized {
        // Only allow to remove an owner, if threshold can still be reached.
        require(ownerCount - 1 >= _threshold, "GS201");
        // Validate owner address and check that it corresponds to owner index.
        require(owner != address(0) && owner != SENTINEL_OWNERS, "GS203");
        require(owners[prevOwner] == owner, "GS205");
        owners[prevOwner] = owners[owner];
        owners[owner] = address(0);
        ownerCount--;
        emit RemovedOwner(owner);
        // Change threshold if threshold was changed.
        if (threshold != _threshold) changeThreshold(_threshold);
    }
    /// @dev Allows to swap/replace an owner from the Safe with another address.
    ///      This can only be done via a Safe transaction.
    /// @notice Replaces the owner `oldOwner` in the Safe with `newOwner`.
    /// @param prevOwner Owner that pointed to the owner to be replaced in the linked list
    /// @param oldOwner Owner address to be replaced.
    /// @param newOwner New owner address.
    function swapOwner(
        address prevOwner,
        address oldOwner,
        address newOwner
    ) public authorized {
        // Owner address cannot be null, the sentinel or the Safe itself.
        require(newOwner != address(0) && newOwner != SENTINEL_OWNERS && newOwner != address(this), "GS203");
        // No duplicate owners allowed.
        require(owners[newOwner] == address(0), "GS204");
        // Validate oldOwner address and check that it corresponds to owner index.
        require(oldOwner != address(0) && oldOwner != SENTINEL_OWNERS, "GS203");
        require(owners[prevOwner] == oldOwner, "GS205");
        owners[newOwner] = owners[oldOwner];
        owners[prevOwner] = newOwner;
        owners[oldOwner] = address(0);
        emit RemovedOwner(oldOwner);
        emit AddedOwner(newOwner);
    }
    /// @dev Allows to update the number of required confirmations by Safe owners.
    ///      This can only be done via a Safe transaction.
    /// @notice Changes the threshold of the Safe to `_threshold`.
    /// @param _threshold New threshold.
    function changeThreshold(uint256 _threshold) public authorized {
        // Validate that threshold is smaller than number of owners.
        require(_threshold <= ownerCount, "GS201");
        // There has to be at least one Safe owner.
        require(_threshold >= 1, "GS202");
        threshold = _threshold;
        emit ChangedThreshold(threshold);
    }
    function getThreshold() public view returns (uint256) {
        return threshold;
    }
    function isOwner(address owner) public view returns (bool) {
        return owner != SENTINEL_OWNERS && owners[owner] != address(0);
    }
    /// @dev Returns array of owners.
    /// @return Array of Safe owners.
    function getOwners() public view returns (address[] memory) {
        address[] memory array = new address[](ownerCount);
        // populate return array
        uint256 index = 0;
        address currentOwner = owners[SENTINEL_OWNERS];
        while (currentOwner != SENTINEL_OWNERS) {
            array[index] = currentOwner;
            currentOwner = owners[currentOwner];
            index++;
        }
        return array;
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title Enum - Collection of enums
/// @author Richard Meissner - <[email protected]>
contract Enum {
    enum Operation {Call, DelegateCall}
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title EtherPaymentFallback - A contract that has a fallback to accept ether payments
/// @author Richard Meissner - <[email protected]>
contract EtherPaymentFallback {
    event SafeReceived(address indexed sender, uint256 value);
    /// @dev Fallback function accepts Ether transactions.
    receive() external payable {
        emit SafeReceived(msg.sender, msg.value);
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title SecuredTokenTransfer - Secure token transfer
/// @author Richard Meissner - <[email protected]>
contract SecuredTokenTransfer {
    /// @dev Transfers a token and returns if it was a success
    /// @param token Token that should be transferred
    /// @param receiver Receiver to whom the token should be transferred
    /// @param amount The amount of tokens that should be transferred
    function transferToken(
        address token,
        address receiver,
        uint256 amount
    ) internal returns (bool transferred) {
        // 0xa9059cbb - keccack("transfer(address,uint256)")
        bytes memory data = abi.encodeWithSelector(0xa9059cbb, receiver, amount);
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // We write the return value to scratch space.
            // See https://docs.soliditylang.org/en/v0.7.6/internals/layout_in_memory.html#layout-in-memory
            let success := call(sub(gas(), 10000), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            switch returndatasize()
                case 0 {
                    transferred := success
                }
                case 0x20 {
                    transferred := iszero(or(iszero(success), iszero(mload(0))))
                }
                default {
                    transferred := 0
                }
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title SelfAuthorized - authorizes current contract to perform actions
/// @author Richard Meissner - <[email protected]>
contract SelfAuthorized {
    function requireSelfCall() private view {
        require(msg.sender == address(this), "GS031");
    }
    modifier authorized() {
        // This is a function call as it minimized the bytecode size
        requireSelfCall();
        _;
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title SignatureDecoder - Decodes signatures that a encoded as bytes
/// @author Richard Meissner - <[email protected]>
contract SignatureDecoder {
    /// @dev divides bytes signature into `uint8 v, bytes32 r, bytes32 s`.
    /// @notice Make sure to peform a bounds check for @param pos, to avoid out of bounds access on @param signatures
    /// @param pos which signature to read. A prior bounds check of this parameter should be performed, to avoid out of bounds access
    /// @param signatures concatenated rsv signatures
    function signatureSplit(bytes memory signatures, uint256 pos)
        internal
        pure
        returns (
            uint8 v,
            bytes32 r,
            bytes32 s
        )
    {
        // The signature format is a compact form of:
        //   {bytes32 r}{bytes32 s}{uint8 v}
        // Compact means, uint8 is not padded to 32 bytes.
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let signaturePos := mul(0x41, pos)
            r := mload(add(signatures, add(signaturePos, 0x20)))
            s := mload(add(signatures, add(signaturePos, 0x40)))
            // Here we are loading the last 32 bytes, including 31 bytes
            // of 's'. There is no 'mload8' to do this.
            //
            // 'byte' is not working due to the Solidity parser, so lets
            // use the second best option, 'and'
            v := and(mload(add(signatures, add(signaturePos, 0x41))), 0xff)
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title Singleton - Base for singleton contracts (should always be first super contract)
///         This contract is tightly coupled to our proxy contract (see `proxies/GnosisSafeProxy.sol`)
/// @author Richard Meissner - <[email protected]>
contract Singleton {
    // singleton always needs to be first declared variable, to ensure that it is at the same location as in the Proxy contract.
    // It should also always be ensured that the address is stored alone (uses a full word)
    address private singleton;
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title StorageAccessible - generic base contract that allows callers to access all internal storage.
/// @notice See https://github.com/gnosis/util-contracts/blob/bb5fe5fb5df6d8400998094fb1b32a178a47c3a1/contracts/StorageAccessible.sol
contract StorageAccessible {
    /**
     * @dev Reads `length` bytes of storage in the currents contract
     * @param offset - the offset in the current contract's storage in words to start reading from
     * @param length - the number of words (32 bytes) of data to read
     * @return the bytes that were read.
     */
    function getStorageAt(uint256 offset, uint256 length) public view returns (bytes memory) {
        bytes memory result = new bytes(length * 32);
        for (uint256 index = 0; index < length; index++) {
            // solhint-disable-next-line no-inline-assembly
            assembly {
                let word := sload(add(offset, index))
                mstore(add(add(result, 0x20), mul(index, 0x20)), word)
            }
        }
        return result;
    }
    /**
     * @dev Performs a delegetecall on a targetContract in the context of self.
     * Internally reverts execution to avoid side effects (making it static).
     *
     * This method reverts with data equal to `abi.encode(bool(success), bytes(response))`.
     * Specifically, the `returndata` after a call to this method will be:
     * `success:bool || response.length:uint256 || response:bytes`.
     *
     * @param targetContract Address of the contract containing the code to execute.
     * @param calldataPayload Calldata that should be sent to the target contract (encoded method name and arguments).
     */
    function simulateAndRevert(address targetContract, bytes memory calldataPayload) external {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let success := delegatecall(gas(), targetContract, add(calldataPayload, 0x20), mload(calldataPayload), 0, 0)
            mstore(0x00, success)
            mstore(0x20, returndatasize())
            returndatacopy(0x40, 0, returndatasize())
            revert(0, add(returndatasize(), 0x40))
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/**
 * @title GnosisSafeMath
 * @dev Math operations with safety checks that revert on error
 * Renamed from SafeMath to GnosisSafeMath to avoid conflicts
 * TODO: remove once open zeppelin update to solc 0.5.0
 */
library GnosisSafeMath {
    /**
     * @dev Multiplies two numbers, reverts on overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // 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-solidity/pull/522
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b);
        return c;
    }
    /**
     * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;
        return c;
    }
    /**
     * @dev Adds two numbers, reverts on overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);
        return c;
    }
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
contract ISignatureValidatorConstants {
    // bytes4(keccak256("isValidSignature(bytes,bytes)")
    bytes4 internal constant EIP1271_MAGIC_VALUE = 0x20c13b0b;
}
abstract contract ISignatureValidator is ISignatureValidatorConstants {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param _data Arbitrary length data signed on the behalf of address(this)
     * @param _signature Signature byte array associated with _data
     *
     * MUST return the bytes4 magic value 0x20c13b0b when function passes.
     * MUST NOT modify state (using STATICCALL for solc < 0.5, view modifier for solc > 0.5)
     * MUST allow external calls
     */
    function isValidSignature(bytes memory _data, bytes memory _signature) public view virtual returns (bytes4);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.16;
import {IChronicle} from "chronicle-std/IChronicle.sol";
import {IScribeOptimistic} from "./IScribeOptimistic.sol";
import {IScribe} from "./IScribe.sol";
import {Scribe} from "./Scribe.sol";
import {LibSchnorr} from "./libs/LibSchnorr.sol";
import {LibSecp256k1} from "./libs/LibSecp256k1.sol";
/**
 * @title ScribeOptimistic
 *
 * @notice Scribe based optimistic Oracle with onchain fault resolution
 */
contract ScribeOptimistic is IScribeOptimistic, Scribe {
    using LibSchnorr for LibSecp256k1.Point;
    using LibSecp256k1 for LibSecp256k1.Point;
    using LibSecp256k1 for LibSecp256k1.Point[];
    // -- Storage --
    /// @inheritdoc IScribeOptimistic
    uint16 public opChallengePeriod;
    /// @inheritdoc IScribeOptimistic
    uint8 public opFeedId;
    /// @dev The truncated hash of the schnorrData provided in last opPoke.
    ///      Binds the opFeed to their schnorrData.
    uint160 internal _schnorrDataCommitment;
    /// @dev The age of the pokeData provided in last opPoke.
    ///      Ensures Schnorr signature can be verified after setting pokeData's
    ///      age to block.timestamp during opPoke.
    uint32 internal _originalOpPokeDataAge;
    /// @dev opScribe's last opPoke'd value and corresponding age.
    PokeData internal _opPokeData;
    /// @inheritdoc IScribeOptimistic
    uint public maxChallengeReward;
    // -- Constructor and Receive Functionality --
    constructor(address initialAuthed, bytes32 wat_)
        payable
        Scribe(initialAuthed, wat_)
    {
        // Note to have a non-zero challenge period.
        _setOpChallengePeriod(20 minutes);
        // Set maxChallengeReward to type(uint).max.
        _setMaxChallengeRewards(type(uint).max);
    }
    receive() external payable {}
    // -- Poke Functionality --
    function _poke(PokeData calldata pokeData, SchnorrData calldata schnorrData)
        internal
        override(Scribe)
    {
        // Load current age from storage.
        uint32 age = _currentPokeData().age;
        // Revert if pokeData stale.
        if (pokeData.age <= age) {
            revert StaleMessage(pokeData.age, age);
        }
        // Revert if pokeData from the future.
        if (pokeData.age > uint32(block.timestamp)) {
            revert FutureMessage(pokeData.age, uint32(block.timestamp));
        }
        // Revert if schnorrData does not prove integrity of pokeData.
        bool ok;
        bytes memory err;
        // forgefmt: disable-next-item
        (ok, err) = _verifySchnorrSignature(
            constructPokeMessage(pokeData),
            schnorrData
        );
        if (!ok) {
            _revert(err);
        }
        // Store pokeData's val in _pokeData storage and set its age to now.
        _pokeData.val = pokeData.val;
        _pokeData.age = uint32(block.timestamp);
        emit Poked(msg.sender, pokeData.val, pokeData.age);
    }
    // -- opPoke Functionality --
    /// @dev Optimized function selector: 0x00000000.
    ///      Note that this function is _not_ defined via the IScribeOptimistic
    ///      interface and one should _not_ depend on it.
    function opPoke_optimized_397084999(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData,
        ECDSAData calldata ecdsaData
    ) external payable {
        _opPoke(pokeData, schnorrData, ecdsaData);
    }
    /// @inheritdoc IScribeOptimistic
    function opPoke(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData,
        ECDSAData calldata ecdsaData
    ) external {
        _opPoke(pokeData, schnorrData, ecdsaData);
    }
    function _opPoke(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData,
        ECDSAData calldata ecdsaData
    ) internal {
        // Revert if schnorrData.feedIds' length is higher than bar's maximum
        // value.
        //
        // Note that this prevents opPoke's with such big schnorrData that it
        // becomes economically unprofitable to challenge them.
        if (schnorrData.feedIds.length > type(uint8).max) {
            revert BarNotReached(type(uint8).max, bar);
        }
        // Load _opPokeData from storage.
        PokeData memory opPokeData = _opPokeData;
        // Decide whether _opPokeData finalized.
        bool opPokeDataFinalized =
            opPokeData.age + opChallengePeriod <= uint32(block.timestamp);
        // Revert if _opPokeData not finalized, i.e. still challengeable.
        if (!opPokeDataFinalized) {
            revert InChallengePeriod();
        }
        // Decide current age.
        uint32 age =
            opPokeData.age > _pokeData.age ? opPokeData.age : _pokeData.age;
        // Revert if pokeData stale.
        if (pokeData.age <= age) {
            revert StaleMessage(pokeData.age, age);
        }
        // Revert if pokeData from the future.
        if (pokeData.age > uint32(block.timestamp)) {
            revert FutureMessage(pokeData.age, uint32(block.timestamp));
        }
        // Recover ECDSA signer.
        address signer = ecrecover(
            _constructOpPokeMessage(pokeData, schnorrData),
            ecdsaData.v,
            ecdsaData.r,
            ecdsaData.s
        );
        // Compute feed id of signer.
        uint8 feedId = uint8(uint(uint160(signer)) >> 152);
        // Revert if signer not feed.
        // assert(_pubKeys[feedId].toAddress() != address(0));
        if (_pubKeys[feedId].toAddress() != signer) {
            revert SignerNotFeed(signer);
        }
        // Store the feed's id as opFeedId and bind them to their provided
        // schnorrData.
        opFeedId = feedId;
        _schnorrDataCommitment = uint160(
            uint(
                keccak256(
                    abi.encodePacked(
                        schnorrData.signature,
                        schnorrData.commitment,
                        schnorrData.feedIds
                    )
                )
            )
        );
        // If _opPokeData provides the current val, move it to the _pokeData
        // storage to free _opPokeData storage. If the current val is provided
        // by _pokeData, _opPokeData can be overwritten.
        if (opPokeData.age == age) {
            _pokeData = opPokeData;
        }
        // Store provided pokeData's val in _opPokeData storage.
        _opPokeData.val = pokeData.val;
        _opPokeData.age = uint32(block.timestamp);
        // Store pokeData's age to allow recreating original pokeMessage.
        _originalOpPokeDataAge = pokeData.age;
        emit OpPoked(msg.sender, signer, schnorrData, pokeData);
    }
    /// @inheritdoc IScribeOptimistic
    function opChallenge(SchnorrData calldata schnorrData)
        external
        returns (bool)
    {
        // Load _opPokeData from storage.
        PokeData memory opPokeData = _opPokeData;
        // Decide whether _opPokeData is challengeable.
        bool opPokeDataChallengeable =
            opPokeData.age + opChallengePeriod > uint32(block.timestamp);
        // Revert if _opPokeData is not challengeable.
        if (!opPokeDataChallengeable) {
            revert NoOpPokeToChallenge();
        }
        // Construct truncated hash from schnorrData.
        uint160 schnorrDataHash = uint160(
            uint(
                keccak256(
                    abi.encodePacked(
                        schnorrData.signature,
                        schnorrData.commitment,
                        schnorrData.feedIds
                    )
                )
            )
        );
        // Revert if schnorrDataHash does not match _schnorrDataCommitment.
        if (schnorrDataHash != _schnorrDataCommitment) {
            revert SchnorrDataMismatch(schnorrDataHash, _schnorrDataCommitment);
        }
        // Decide whether schnorrData verifies opPokeData.
        bool ok;
        bytes memory err;
        (ok, err) = _verifySchnorrSignature(
            constructPokeMessage(
                PokeData({val: opPokeData.val, age: _originalOpPokeDataAge})
            ),
            schnorrData
        );
        if (ok) {
            // Decide whether _opPokeData stale already.
            bool opPokeDataStale = opPokeData.age <= _pokeData.age;
            // If _opPokeData not stale, finalize it by moving it to the
            // _pokeData storage. Note to also clean the _opPokeData storage to
            // not block new opPoke's as _opPokeData's challenge period not over.
            if (!opPokeDataStale) {
                _pokeData = _opPokeData;
                delete _opPokeData;
            }
            emit OpPokeChallengedUnsuccessfully(msg.sender, schnorrData);
        } else {
            // Drop opFeed and delete invalid _opPokeData.
            // Note to use address(this) as caller to indicate self-governed
            // drop of feed.
            _drop(address(this), opFeedId);
            // Pay ETH reward to challenger.
            uint reward = challengeReward();
            if (_sendETH(payable(msg.sender), reward)) {
                emit OpChallengeRewardPaid(msg.sender, schnorrData, reward);
            }
            emit OpPokeChallengedSuccessfully(msg.sender, schnorrData, err);
        }
        // Return whether challenging was successful.
        return !ok;
    }
    /// @inheritdoc IScribeOptimistic
    function constructOpPokeMessage(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData
    ) external view returns (bytes32) {
        return _constructOpPokeMessage(pokeData, schnorrData);
    }
    function _constructOpPokeMessage(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData
    ) internal view returns (bytes32) {
        return keccak256(
            abi.encodePacked(
                "\\x19Ethereum Signed Message:\
32",
                keccak256(
                    abi.encodePacked(
                        wat,
                        pokeData.val,
                        pokeData.age,
                        schnorrData.signature,
                        schnorrData.commitment,
                        schnorrData.feedIds
                    )
                )
            )
        );
    }
    // -- Toll'ed Read Functionality --
    // - IChronicle Functions
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function read()
        external
        view
        override(IChronicle, Scribe)
        toll
        returns (uint)
    {
        uint val = _currentPokeData().val;
        require(val != 0);
        return val;
    }
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function tryRead()
        external
        view
        override(IChronicle, Scribe)
        toll
        returns (bool, uint)
    {
        uint val = _currentPokeData().val;
        return (val != 0, val);
    }
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function readWithAge()
        external
        view
        override(IChronicle, Scribe)
        toll
        returns (uint, uint)
    {
        PokeData memory pokeData = _currentPokeData();
        require(pokeData.val != 0);
        return (pokeData.val, pokeData.age);
    }
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function tryReadWithAge()
        external
        view
        override(IChronicle, Scribe)
        toll
        returns (bool, uint, uint)
    {
        PokeData memory pokeData = _currentPokeData();
        return pokeData.val != 0
            ? (true, pokeData.val, pokeData.age)
            : (false, 0, 0);
    }
    // - MakerDAO Compatibility
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function peek()
        external
        view
        override(IScribe, Scribe)
        toll
        returns (uint, bool)
    {
        uint val = _currentPokeData().val;
        return (val, val != 0);
    }
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function peep()
        external
        view
        override(IScribe, Scribe)
        toll
        returns (uint, bool)
    {
        uint val = _currentPokeData().val;
        return (val, val != 0);
    }
    // - Chainlink Compatibility
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function latestRoundData()
        external
        view
        override(IScribe, Scribe)
        toll
        returns (
            uint80 roundId,
            int answer,
            uint startedAt,
            uint updatedAt,
            uint80 answeredInRound
        )
    {
        PokeData memory pokeData = _currentPokeData();
        roundId = 1;
        answer = int(uint(pokeData.val));
        // assert(uint(answer) == uint(pokeData.val));
        startedAt = 0;
        updatedAt = pokeData.age;
        answeredInRound = roundId;
    }
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function latestAnswer()
        external
        view
        virtual
        override(IScribe, Scribe)
        toll
        returns (int)
    {
        uint val = _currentPokeData().val;
        return int(val);
    }
    function _currentPokeData() internal view returns (PokeData memory) {
        // Load pokeData slots from storage.
        PokeData memory pokeData = _pokeData;
        PokeData memory opPokeData = _opPokeData;
        // Decide whether _opPokeData is finalized.
        bool opPokeDataFinalized =
            opPokeData.age + opChallengePeriod <= uint32(block.timestamp);
        // Decide and return current pokeData.
        if (opPokeDataFinalized && opPokeData.age > pokeData.age) {
            return opPokeData;
        } else {
            return pokeData;
        }
    }
    // -- Auth'ed Functionality --
    /// @inheritdoc IScribeOptimistic
    function setOpChallengePeriod(uint16 opChallengePeriod_) external auth {
        _setOpChallengePeriod(opChallengePeriod_);
    }
    function _setOpChallengePeriod(uint16 opChallengePeriod_) internal {
        require(opChallengePeriod_ != 0);
        if (opChallengePeriod != opChallengePeriod_) {
            emit OpChallengePeriodUpdated(
                msg.sender, opChallengePeriod, opChallengePeriod_
            );
            opChallengePeriod = opChallengePeriod_;
        }
        _afterAuthedAction();
    }
    function _drop(address caller, uint8 feedId) internal override(Scribe) {
        super._drop(caller, feedId);
        _afterAuthedAction();
    }
    function _setBar(uint8 bar_) internal override(Scribe) {
        super._setBar(bar_);
        _afterAuthedAction();
    }
    /// @dev Ensures an auth'ed configuration update does not enable
    ///      successfully challenging a prior to the update valid opPoke.
    ///
    /// @custom:invariant Val is provided if _pokeData prior to the tx is
    ///                   non-empty. Note that this is the case if there were
    ///                   at least two valid calls ∊ {poke, opPoke}.
    ///                     preTx(_pokeData) != (0, 0)
    ///                       → (true, _) = postTx(tryRead())
    /// @custom:invariant Val is provided via _pokeData after the tx.
    ///                     postTx(readWithAge()) = postTx(_pokeData)
    /// @custom:invariant _opPokeData is empty after the tx.
    ///                     (0, 0) = postTx(_opPokeData)
    function _afterAuthedAction() internal {
        // Do nothing during deployment.
        if (address(this).code.length == 0) return;
        // Load _opPokeData from storage.
        PokeData memory opPokeData = _opPokeData;
        // Decide whether _opPokeData is finalized.
        //
        // Note that the decision is based on the possibly updated
        // opChallengePeriod! This means a once finalized opPoke may be dropped
        // if the opChallengePeriod was increased.
        bool opPokeDataFinalized =
            opPokeData.age + opChallengePeriod <= uint32(block.timestamp);
        // Note that _opPokeData is in one of the following three states:
        // 1. finalized and newer than _pokeData
        // 2. finalized but older than _pokeData
        // 3. non-finalized
        //
        // Note that for state 1 _opPokeData can be moved to _pokeData and
        // afterwards deleted.
        // Note that for state 2 and 3 _opPokeData can be directly deleted.
        // If _opPokeData is in state 1, move it to the _pokeData storage.
        //
        // Note that this ensures the current value is provided via _pokeData.
        if (opPokeDataFinalized && opPokeData.age > _pokeData.age) {
            _pokeData = opPokeData;
        }
        // If _opPokeData is in state 3, emit event to indicate a possibly valid
        // opPoke was dropped.
        if (!opPokeDataFinalized) {
            emit OpPokeDataDropped(msg.sender, opPokeData);
        }
        // Now it is safe to delete _opPokeData.
        delete _opPokeData;
        // Note that the current value is now provided via _pokeData.
        // assert(_currentPokeData().val == _pokeData.val);
        // assert(_currentPokeData().age == _pokeData.age);
        // Set the age of contract's current value to block.timestamp.
        //
        // Note that this ensures an already signed, but now possibly invalid
        // with regards to contract configurations, opPoke payload cannot be
        // opPoke'd anymore.
        _pokeData.age = uint32(block.timestamp);
    }
    // -- Searcher Incentivization Logic --
    /// @inheritdoc IScribeOptimistic
    function challengeReward() public view returns (uint) {
        uint balance = address(this).balance;
        return balance > maxChallengeReward ? maxChallengeReward : balance;
    }
    /// @inheritdoc IScribeOptimistic
    function setMaxChallengeReward(uint maxChallengeReward_) external auth {
        _setMaxChallengeRewards(maxChallengeReward_);
    }
    function _setMaxChallengeRewards(uint maxChallengeReward_) internal {
        if (maxChallengeReward != maxChallengeReward_) {
            emit MaxChallengeRewardUpdated(
                msg.sender, maxChallengeReward, maxChallengeReward_
            );
            maxChallengeReward = maxChallengeReward_;
        }
    }
    function _sendETH(address payable to, uint amount)
        internal
        returns (bool)
    {
        (bool ok,) = to.call{value: amount}("");
        return ok;
    }
}
/**
 * @dev Contract overwrite to deploy contract instances with specific naming.
 *
 *      For more info, see docs/Deployment.md.
 */
contract Chronicle_MOG_USD_1 is ScribeOptimistic {
    constructor(address initialAuthed, bytes32 wat_)
        ScribeOptimistic(initialAuthed, wat_)
    {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
/**
 * @title IChronicle
 *
 * @notice Interface for Chronicle Protocol's oracle products
 */
interface IChronicle {
    /// @notice Returns the oracle's identifier.
    /// @return wat The oracle's identifier.
    function wat() external view returns (bytes32 wat);
    /// @notice Returns the oracle's current value.
    /// @dev Reverts if no value set.
    /// @return value The oracle's current value.
    function read() external view returns (uint value);
    /// @notice Returns the oracle's current value and its age.
    /// @dev Reverts if no value set.
    /// @return value The oracle's current value.
    /// @return age The value's age.
    function readWithAge() external view returns (uint value, uint age);
    /// @notice Returns the oracle's current value.
    /// @return isValid True if value exists, false otherwise.
    /// @return value The oracle's current value if it exists, zero otherwise.
    function tryRead() external view returns (bool isValid, uint value);
    /// @notice Returns the oracle's current value and its age.
    /// @return isValid True if value exists, false otherwise.
    /// @return value The oracle's current value if it exists, zero otherwise.
    /// @return age The value's age if value exists, zero otherwise.
    function tryReadWithAge()
        external
        view
        returns (bool isValid, uint value, uint age);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {IScribe} from "./IScribe.sol";
interface IScribeOptimistic is IScribe {
    /// @notice Thrown if attempted to opPoke while a previous opPoke is still
    ///         in challenge period.
    error InChallengePeriod();
    /// @notice Thrown if opChallenge called while no challengeable opPoke exists.
    error NoOpPokeToChallenge();
    /// @notice Thrown if opChallenge called with SchnorrData not matching
    ///         opPoke's SchnorrData.
    /// @param gotHash The truncated keccak256 hash of the SchnorrData argument.
    /// @param wantHash The truncated expected keccak256 hash of the SchnorrData
    ///                 argument.
    error SchnorrDataMismatch(uint160 gotHash, uint160 wantHash);
    /// @notice Thrown if opPoke called with non-feed ECDSA signature.
    /// @param signer The ECDSA signature's signer.
    error SignerNotFeed(address signer);
    /// @notice Emitted when oracles was successfully opPoked.
    /// @param caller The caller's address.
    /// @param opFeed The feed that signed the opPoke.
    /// @param schnorrData The schnorrData opPoked.
    /// @param pokeData The pokeData opPoked.
    event OpPoked(
        address indexed caller,
        address indexed opFeed,
        IScribe.SchnorrData schnorrData,
        IScribe.PokeData pokeData
    );
    /// @notice Emitted when successfully challenged an opPoke.
    /// @param caller The caller's address.
    /// @param schnorrData The schnorrData challenged.
    /// @param schnorrErr The abi-encoded custom error returned from the failed
    ///                   Schnorr signature verification.
    event OpPokeChallengedSuccessfully(
        address indexed caller,
        IScribe.SchnorrData schnorrData,
        bytes schnorrErr
    );
    /// @notice Emitted when unsuccessfully challenged an opPoke.
    /// @param caller The caller's address.
    /// @param schnorrData The schnorrData challenged.
    event OpPokeChallengedUnsuccessfully(
        address indexed caller, IScribe.SchnorrData schnorrData
    );
    /// @notice Emitted when ETH reward paid for successfully challenging an
    ///         opPoke.
    /// @param challenger The challenger to which the reward was send.
    /// @param schnorrData The schnorrData challenged.
    /// @param reward The ETH rewards paid.
    event OpChallengeRewardPaid(
        address indexed challenger, IScribe.SchnorrData schnorrData, uint reward
    );
    /// @notice Emitted when an opPoke dropped.
    /// @dev opPoke's are dropped if security parameters are updated that could
    ///      lead to an initially valid opPoke becoming invalid or if an opPoke
    ///      was successfully challenged.
    /// @param caller The caller's address.
    /// @param pokeData The pokeData dropped.
    event OpPokeDataDropped(address indexed caller, IScribe.PokeData pokeData);
    /// @notice Emitted when length of opChallengePeriod updated.
    /// @param caller The caller's address.
    /// @param oldOpChallengePeriod The old opChallengePeriod's length.
    /// @param newOpChallengePeriod The new opChallengePeriod's length.
    event OpChallengePeriodUpdated(
        address indexed caller,
        uint16 oldOpChallengePeriod,
        uint16 newOpChallengePeriod
    );
    /// @notice Emitted when maxChallengeReward updated.
    /// @param caller The caller's address.
    /// @param oldMaxChallengeReward The old maxChallengeReward.
    /// @param newMaxChallengeReward The new maxChallengeReward.
    event MaxChallengeRewardUpdated(
        address indexed caller,
        uint oldMaxChallengeReward,
        uint newMaxChallengeReward
    );
    /// @notice Optimistically pokes the oracle.
    /// @dev Expects `pokeData`'s age to be greater than the timestamp of the
    ///      last successful poke.
    /// @dev Expects `pokeData`'s age to not be greater than the current time.
    /// @dev Expects `ecdsaData` to be a signature from a feed.
    /// @dev Expects `ecdsaData` to prove the integrity of the `pokeData` and
    ///      `schnorrData`.
    /// @dev If the `schnorrData` is proven to be invalid via the opChallenge
    ///      function, the `ecdsaData` signing feed will be dropped.
    /// @param pokeData The PokeData being poked.
    /// @param schnorrData The SchnorrData optimistically assumed to be
    ///                    proving the `pokeData`'s integrity.
    /// @param ecdsaData The ECDSAData proving the integrity of the
    ///                  `pokeData` and `schnorrData`.
    function opPoke(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData,
        ECDSAData calldata ecdsaData
    ) external;
    /// @notice Challenges the current challengeable opPoke.
    /// @dev If opPoke is determined to be invalid, the caller receives an ETH
    ///      bounty. The bounty is defined via the `challengeReward()(uint)`
    ///      function.
    /// @dev If opPoke is determined to be invalid, the corresponding feed is
    ///      dropped.
    /// @param schnorrData The SchnorrData initially provided via
    ///                    opPoke.
    /// @return ok True if opPoke declared invalid, false otherwise.
    function opChallenge(SchnorrData calldata schnorrData)
        external
        returns (bool ok);
    /// @notice Returns the message expected to be signed via ECDSA for calling
    ///         opPoke.
    /// @dev The message is defined as:
    ///         H(tag ‖ H(wat ‖ pokeData ‖ schnorrData)), where H() is the keccak256 function.
    /// @param pokeData The pokeData being optimistically poked.
    /// @param schnorrData The schnorrData proving `pokeData`'s integrity.
    /// @return opPokeMessage Message to be signed for an opPoke for `pokeData`
    ///                       and `schnorrData`.
    function constructOpPokeMessage(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData
    ) external view returns (bytes32 opPokeMessage);
    /// @notice Returns the feed id of the feed last opPoke'd.
    /// @return opFeedId Feed id of the feed last opPoke'd.
    function opFeedId() external view returns (uint8 opFeedId);
    /// @notice Returns the opChallengePeriod security parameter.
    /// @return opChallengePeriod The opChallengePeriod security parameter.
    function opChallengePeriod()
        external
        view
        returns (uint16 opChallengePeriod);
    /// @notice Returns the maxChallengeRewards parameter.
    /// @return maxChallengeReward The maxChallengeReward parameter.
    function maxChallengeReward()
        external
        view
        returns (uint maxChallengeReward);
    /// @notice Returns the ETH rewards being paid for successfully challenging
    ///         an opPoke.
    /// @return challengeReward The ETH reward for successfully challenging an
    ///                         opPoke.
    function challengeReward() external view returns (uint challengeReward);
    /// @notice Updates the opChallengePeriod security parameter.
    /// @dev Only callable by auth'ed address.
    /// @dev Reverts if opChallengePeriod is zero.
    /// @dev Note that evaluating whether an opPoke is finalized happens via the
    ///      _current_ opChallengePeriod.
    ///      This means a finalized opPoke is dropped if opChallengePeriod is
    ///      decreased to a value less than opPoke's age.
    /// @param opChallengePeriod The value to update opChallengePeriod to.
    function setOpChallengePeriod(uint16 opChallengePeriod) external;
    /// @notice Updates the maxChallengeReward parameter.
    /// @dev Only callable by auth'ed address.
    /// @param maxChallengeReward The value to update maxChallengeReward to.
    function setMaxChallengeReward(uint maxChallengeReward) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {IChronicle} from "chronicle-std/IChronicle.sol";
import {LibSecp256k1} from "./libs/LibSecp256k1.sol";
interface IScribe is IChronicle {
    /// @dev PokeData encapsulates a value and its age.
    struct PokeData {
        uint128 val;
        uint32 age;
    }
    /// @dev SchnorrData encapsulates a (aggregated) Schnorr signature.
    ///      Schnorr signatures are used to prove a PokeData's integrity.
    struct SchnorrData {
        bytes32 signature;
        address commitment;
        bytes feedIds;
    }
    /// @dev ECDSAData encapsulates an ECDSA signature.
    struct ECDSAData {
        uint8 v;
        bytes32 r;
        bytes32 s;
    }
    /// @notice Thrown if a poked value's age is not greater than the oracle's
    ///         current value's age.
    /// @param givenAge The poked value's age.
    /// @param currentAge The oracle's current value's age.
    error StaleMessage(uint32 givenAge, uint32 currentAge);
    /// @notice Thrown if a poked value's age is greater than the current
    ///         time.
    /// @param givenAge The poked value's age.
    /// @param currentTimestamp The current time.
    error FutureMessage(uint32 givenAge, uint32 currentTimestamp);
    /// @notice Thrown if Schnorr signature not signed by exactly bar many
    ///         signers.
    /// @param numberSigners The number of signers for given Schnorr signature.
    /// @param bar The bar security parameter.
    error BarNotReached(uint8 numberSigners, uint8 bar);
    /// @notice Thrown if given feed id invalid.
    /// @param feedId The invalid feed id.
    error InvalidFeedId(uint8 feedId);
    /// @notice Thrown if double signing attempted.
    /// @param feedId The id of the feed attempting to double sign.
    error DoubleSigningAttempted(uint8 feedId);
    /// @notice Thrown if Schnorr signature verification failed.
    error SchnorrSignatureInvalid();
    /// @notice Emitted when oracle was successfully poked.
    /// @param caller The caller's address.
    /// @param val The value poked.
    /// @param age The age of the value poked.
    event Poked(address indexed caller, uint128 val, uint32 age);
    /// @notice Emitted when new feed lifted.
    /// @param caller The caller's address.
    /// @param feed The feed address lifted.
    event FeedLifted(address indexed caller, address indexed feed);
    /// @notice Emitted when feed dropped.
    /// @param caller The caller's address.
    /// @param feed The feed address dropped.
    event FeedDropped(address indexed caller, address indexed feed);
    /// @notice Emitted when bar updated.
    /// @param caller The caller's address.
    /// @param oldBar The old bar's value.
    /// @param newBar The new bar's value.
    event BarUpdated(address indexed caller, uint8 oldBar, uint8 newBar);
    /// @notice Returns the feed registration message.
    /// @dev This message must be signed by a feed in order to be lifted.
    /// @return feedRegistrationMessage Chronicle Protocol's feed registration
    ///                                 message.
    function feedRegistrationMessage()
        external
        view
        returns (bytes32 feedRegistrationMessage);
    /// @notice Returns the bar security parameter.
    /// @return bar The bar security parameter.
    function bar() external view returns (uint8 bar);
    /// @notice Returns the number of decimals of the oracle's value.
    /// @dev Provides partial compatibility with Chainlink's
    ///      IAggregatorV3Interface.
    /// @return decimals The oracle value's number of decimals.
    function decimals() external view returns (uint8 decimals);
    /// @notice Returns the oracle's latest value.
    /// @dev Provides partial compatibility with Chainlink's
    ///      IAggregatorV3Interface.
    /// @return roundId 1.
    /// @return answer The oracle's latest value.
    /// @return startedAt 0.
    /// @return updatedAt The timestamp of oracle's latest update.
    /// @return answeredInRound 1.
    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int answer,
            uint startedAt,
            uint updatedAt,
            uint80 answeredInRound
        );
    /// @notice Returns the oracle's latest value.
    /// @dev Provides partial compatibility with Chainlink's
    ///      IAggregatorV3Interface.
    /// @custom:deprecated See https://docs.chain.link/data-feeds/api-reference/#latestanswer.
    /// @return answer The oracle's latest value.
    function latestAnswer() external view returns (int);
    /// @notice Pokes the oracle.
    /// @dev Expects `pokeData`'s age to be greater than the timestamp of the
    ///      last successful poke.
    /// @dev Expects `pokeData`'s age to not be greater than the current time.
    /// @dev Expects `schnorrData` to prove `pokeData`'s integrity.
    ///      See `isAcceptableSchnorrSignatureNow(bytes32,SchnorrData)(bool)`.
    /// @param pokeData The PokeData being poked.
    /// @param schnorrData The SchnorrData proving the `pokeData`'s
    ///                    integrity.
    function poke(PokeData calldata pokeData, SchnorrData calldata schnorrData)
        external;
    /// @notice Returns whether the Schnorr signature `schnorrData` is
    ///         currently acceptable for message `message`.
    /// @dev Note that a valid Schnorr signature is only acceptable if the
    ///      signature was signed by exactly bar many feeds.
    ///      For more info, see `bar()(uint8)` and `feeds()(address[])`.
    /// @dev Note that bar and feeds are configurable, meaning a once acceptable
    ///      Schnorr signature may become unacceptable in the future.
    /// @param message The message expected to be signed via `schnorrData`.
    /// @param schnorrData The SchnorrData to verify whether it proves
    ///                    the `message`'s integrity.
    /// @return ok True if Schnorr signature is acceptable, false otherwise.
    function isAcceptableSchnorrSignatureNow(
        bytes32 message,
        SchnorrData calldata schnorrData
    ) external view returns (bool ok);
    /// @notice Returns the message expected to be signed via Schnorr for
    ///         `pokeData`.
    /// @dev The message is defined as:
    ///         H(tag ‖ H(wat ‖ pokeData)), where H() is the keccak256 function.
    /// @param pokeData The pokeData to create the message for.
    /// @return pokeMessage Message for `pokeData`.
    function constructPokeMessage(PokeData calldata pokeData)
        external
        view
        returns (bytes32 pokeMessage);
    /// @notice Returns whether address `who` is a feed.
    /// @param who The address to check.
    /// @return isFeed True if `who` is feed, false otherwise.
    function feeds(address who) external view returns (bool isFeed);
    /// @notice Returns whether feed id `feedId` is a feed and, if so, the
    ///         feed's address.
    /// @param feedId The feed id to check.
    /// @return isFeed True if `feedId` is a feed, false otherwise.
    /// @return feed Address of the feed with id `feedId` if `feedId` is a feed,
    ///              zero-address otherwise.
    function feeds(uint8 feedId)
        external
        view
        returns (bool isFeed, address feed);
    /// @notice Returns list of feed addresses.
    /// @dev Note that this function has a high gas consumption and is not
    ///      intended to be called onchain.
    /// @return feeds List of feed addresses.
    function feeds() external view returns (address[] memory feeds);
    /// @notice Lifts public key `pubKey` to being a feed.
    /// @dev Only callable by auth'ed address.
    /// @dev The message expected to be signed by `ecdsaData` is defined via
    ///      `feedRegistrationMessage()(bytes32)`.
    /// @param pubKey The public key of the feed.
    /// @param ecdsaData ECDSA signed message by the feed's public key.
    /// @return feedId The id of the newly lifted feed.
    function lift(LibSecp256k1.Point memory pubKey, ECDSAData memory ecdsaData)
        external
        returns (uint8 feedId);
    /// @notice Lifts public keys `pubKeys` to being feeds.
    /// @dev Only callable by auth'ed address.
    /// @dev The message expected to be signed by `ecdsaDatas` is defined via
    ///      `feedRegistrationMessage()(bytes32)`.
    /// @param pubKeys The public keys of the feeds.
    /// @param ecdsaDatas ECDSA signed message by the feeds' public keys.
    /// @return List of feed ids of the newly lifted feeds.
    function lift(
        LibSecp256k1.Point[] memory pubKeys,
        ECDSAData[] memory ecdsaDatas
    ) external returns (uint8[] memory);
    /// @notice Drops feed with id `feedId`.
    /// @dev Only callable by auth'ed address.
    /// @param feedId The feed id to drop.
    function drop(uint8 feedId) external;
    /// @notice Drops feeds with ids' `feedIds`.
    /// @dev Only callable by auth'ed address.
    /// @param feedIds The feed ids to drop.
    function drop(uint8[] memory feedIds) external;
    /// @notice Updates the bar security parameters to `bar`.
    /// @dev Only callable by auth'ed address.
    /// @dev Reverts if `bar` is zero.
    /// @param bar The value to update bar to.
    function setBar(uint8 bar) external;
    /// @notice Returns the oracle's current value.
    /// @custom:deprecated Use `tryRead()(bool,uint)` instead.
    /// @return value The oracle's current value if it exists, zero otherwise.
    /// @return isValid True if value exists, false otherwise.
    function peek() external view returns (uint value, bool isValid);
    /// @notice Returns the oracle's current value.
    /// @custom:deprecated Use `tryRead()(bool,uint)` instead.
    /// @return value The oracle's current value if it exists, zero otherwise.
    /// @return isValid True if value exists, false otherwise.
    function peep() external view returns (uint value, bool isValid);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.16;
import {IChronicle} from "chronicle-std/IChronicle.sol";
import {Auth} from "chronicle-std/auth/Auth.sol";
import {Toll} from "chronicle-std/toll/Toll.sol";
import {IScribe} from "./IScribe.sol";
import {LibSchnorr} from "./libs/LibSchnorr.sol";
import {LibSecp256k1} from "./libs/LibSecp256k1.sol";
/**
 * @title Scribe
 * @custom:version 2.0.0
 *
 * @notice Efficient Schnorr multi-signature based Oracle
 */
contract Scribe is IScribe, Auth, Toll {
    using LibSchnorr for LibSecp256k1.Point;
    using LibSecp256k1 for LibSecp256k1.Point;
    using LibSecp256k1 for LibSecp256k1.JacobianPoint;
    /// @inheritdoc IScribe
    uint8 public constant decimals = 18;
    /// @inheritdoc IScribe
    bytes32 public constant feedRegistrationMessage = keccak256(
        abi.encodePacked(
            "\\x19Ethereum Signed Message:\
32",
            keccak256("Chronicle Feed Registration")
        )
    );
    /// @inheritdoc IChronicle
    bytes32 public immutable wat;
    // -- Storage --
    /// @dev Scribe's current value and corresponding age.
    PokeData internal _pokeData;
    /// @dev Statically allocated array of feeds' public keys.
    ///      Indexed via the public keys address' highest-order byte.
    LibSecp256k1.Point[256] internal _pubKeys;
    /// @inheritdoc IScribe
    /// @dev Note to have as last in storage to enable downstream contracts to
    ///      pack the slot.
    uint8 public bar;
    // -- Constructor --
    constructor(address initialAuthed, bytes32 wat_)
        payable
        Auth(initialAuthed)
    {
        require(wat_ != 0);
        // Set wat immutable.
        wat = wat_;
        // Let initial bar be 2.
        _setBar(2);
    }
    // -- Poke Functionality --
    /// @dev Optimized function selector: 0x00000082.
    ///      Note that this function is _not_ defined via the IScribe interface
    ///      and one should _not_ depend on it.
    function poke_optimized_7136211(
        PokeData calldata pokeData,
        SchnorrData calldata schnorrData
    ) external {
        _poke(pokeData, schnorrData);
    }
    /// @inheritdoc IScribe
    function poke(PokeData calldata pokeData, SchnorrData calldata schnorrData)
        external
    {
        _poke(pokeData, schnorrData);
    }
    function _poke(PokeData calldata pokeData, SchnorrData calldata schnorrData)
        internal
        virtual
    {
        // Revert if pokeData stale.
        if (pokeData.age <= _pokeData.age) {
            revert StaleMessage(pokeData.age, _pokeData.age);
        }
        // Revert if pokeData from the future.
        if (pokeData.age > uint32(block.timestamp)) {
            revert FutureMessage(pokeData.age, uint32(block.timestamp));
        }
        // Revert if schnorrData does not prove integrity of pokeData.
        bool ok;
        bytes memory err;
        // forgefmt: disable-next-item
        (ok, err) = _verifySchnorrSignature(
            constructPokeMessage(pokeData),
            schnorrData
        );
        if (!ok) {
            _revert(err);
        }
        // Store pokeData's val in _pokeData storage and set its age to now.
        _pokeData.val = pokeData.val;
        _pokeData.age = uint32(block.timestamp);
        emit Poked(msg.sender, pokeData.val, pokeData.age);
    }
    /// @inheritdoc IScribe
    function constructPokeMessage(PokeData memory pokeData)
        public
        view
        returns (bytes32)
    {
        return keccak256(
            abi.encodePacked(
                "\\x19Ethereum Signed Message:\
32",
                keccak256(abi.encodePacked(wat, pokeData.val, pokeData.age))
            )
        );
    }
    // -- Schnorr Signature Verification --
    /// @inheritdoc IScribe
    function isAcceptableSchnorrSignatureNow(
        bytes32 message,
        SchnorrData calldata schnorrData
    ) external view returns (bool) {
        bool ok;
        (ok, /*err*/ ) = _verifySchnorrSignature(message, schnorrData);
        return ok;
    }
    /// @custom:invariant Reverts iff out of gas.
    /// @custom:invariant Runtime is O(bar).
    function _verifySchnorrSignature(
        bytes32 message,
        SchnorrData calldata schnorrData
    ) internal view returns (bool, bytes memory) {
        // Let feedPubKey be the currently processed feed's public key.
        LibSecp256k1.Point memory feedPubKey;
        // Let feedId be the currently processed feed's id.
        uint8 feedId;
        // Let aggPubKey be the sum of processed feeds' public keys.
        // Note that Jacobian coordinates are used.
        LibSecp256k1.JacobianPoint memory aggPubKey;
        // Let bloom be a bloom filter to check for double signing attempts.
        uint bloom;
        // Fail if number feeds unequal to bar.
        //
        // Note that requiring equality constrains the verification's runtime
        // from Ω(bar) to Θ(bar).
        uint numberFeeds = schnorrData.feedIds.length;
        if (numberFeeds != bar) {
            return (false, _errorBarNotReached(uint8(numberFeeds), bar));
        }
        // Initiate feed variables with schnorrData's 0's feed index.
        feedId = uint8(schnorrData.feedIds[0]);
        feedPubKey = _pubKeys[feedId];
        // Fail if feed not lifted.
        if (feedPubKey.isZeroPoint()) {
            return (false, _errorInvalidFeedId(feedId));
        }
        // Initiate bloom filter with feedId set.
        bloom = 1 << feedId;
        // Initiate aggPubKey with value of first feed's public key.
        aggPubKey = feedPubKey.toJacobian();
        for (uint8 i = 1; i < numberFeeds;) {
            // Update feed variables.
            feedId = uint8(schnorrData.feedIds[i]);
            feedPubKey = _pubKeys[feedId];
            // Fail if feed not lifted.
            if (feedPubKey.isZeroPoint()) {
                return (false, _errorInvalidFeedId(feedId));
            }
            // Fail if double signing attempted.
            if (bloom & (1 << feedId) != 0) {
                return (false, _errorDoubleSigningAttempted(feedId));
            }
            // Update bloom filter.
            bloom |= 1 << feedId;
            // assert(aggPubKey.x != feedPubKey.x); // Indicates rogue-key attack
            // Add feedPubKey to already aggregated public keys.
            aggPubKey.addAffinePoint(feedPubKey);
            // forgefmt: disable-next-item
            unchecked { ++i; }
        }
        // Fail if signature verification fails.
        bool ok = aggPubKey.toAffine().verifySignature(
            message, schnorrData.signature, schnorrData.commitment
        );
        if (!ok) {
            return (false, _errorSchnorrSignatureInvalid());
        }
        // Otherwise Schnorr signature is valid.
        return (true, new bytes(0));
    }
    // -- Toll'ed Read Functionality --
    // - IChronicle Functions
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function read() external view virtual toll returns (uint) {
        uint val = _pokeData.val;
        require(val != 0);
        return val;
    }
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function tryRead() external view virtual toll returns (bool, uint) {
        uint val = _pokeData.val;
        return (val != 0, val);
    }
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function readWithAge() external view virtual toll returns (uint, uint) {
        uint val = _pokeData.val;
        uint age = _pokeData.age;
        require(val != 0);
        return (val, age);
    }
    /// @inheritdoc IChronicle
    /// @dev Only callable by toll'ed address.
    function tryReadWithAge()
        external
        view
        virtual
        toll
        returns (bool, uint, uint)
    {
        uint val = _pokeData.val;
        uint age = _pokeData.age;
        return val != 0 ? (true, val, age) : (false, 0, 0);
    }
    // - MakerDAO Compatibility
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function peek() external view virtual toll returns (uint, bool) {
        uint val = _pokeData.val;
        return (val, val != 0);
    }
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function peep() external view virtual toll returns (uint, bool) {
        uint val = _pokeData.val;
        return (val, val != 0);
    }
    // - Chainlink Compatibility
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function latestRoundData()
        external
        view
        virtual
        toll
        returns (
            uint80 roundId,
            int answer,
            uint startedAt,
            uint updatedAt,
            uint80 answeredInRound
        )
    {
        roundId = 1;
        answer = int(uint(_pokeData.val));
        // assert(uint(answer) == uint(_pokeData.val));
        startedAt = 0;
        updatedAt = _pokeData.age;
        answeredInRound = roundId;
    }
    /// @inheritdoc IScribe
    /// @dev Only callable by toll'ed address.
    function latestAnswer() external view virtual toll returns (int) {
        uint val = _pokeData.val;
        return int(val);
    }
    // -- Public Read Functionality --
    /// @inheritdoc IScribe
    function feeds(address who) external view returns (bool) {
        uint8 feedId = uint8(uint(uint160(who)) >> 152);
        LibSecp256k1.Point memory pubKey = _pubKeys[feedId];
        return !pubKey.isZeroPoint() && pubKey.toAddress() == who;
    }
    /// @inheritdoc IScribe
    function feeds(uint8 feedId) external view returns (bool, address) {
        LibSecp256k1.Point memory pubKey = _pubKeys[feedId];
        return pubKey.isZeroPoint()
            ? (false, address(0))
            : (true, pubKey.toAddress());
    }
    /// @inheritdoc IScribe
    function feeds() external view returns (address[] memory) {
        address[] memory feeds_ = new address[](256);
        LibSecp256k1.Point memory pubKey;
        address feed;
        uint ctr;
        for (uint i; i < 256;) {
            pubKey = _pubKeys[uint8(i)];
            if (!pubKey.isZeroPoint()) {
                feed = pubKey.toAddress();
                feeds_[ctr] = feed;
                // forgefmt: disable-next-item
                unchecked { ++ctr; }
            }
            // forgefmt: disable-next-item
            unchecked { ++i; }
        }
        assembly ("memory-safe") {
            mstore(feeds_, ctr)
        }
        return feeds_;
    }
    // -- Auth'ed Functionality --
    /// @inheritdoc IScribe
    function lift(LibSecp256k1.Point memory pubKey, ECDSAData memory ecdsaData)
        external
        auth
        returns (uint8)
    {
        return _lift(pubKey, ecdsaData);
    }
    /// @inheritdoc IScribe
    function lift(
        LibSecp256k1.Point[] memory pubKeys,
        ECDSAData[] memory ecdsaDatas
    ) external auth returns (uint8[] memory) {
        require(pubKeys.length == ecdsaDatas.length);
        uint8[] memory feedIds = new uint8[](pubKeys.length);
        for (uint i; i < pubKeys.length;) {
            feedIds[i] = _lift(pubKeys[i], ecdsaDatas[i]);
            // forgefmt: disable-next-item
            unchecked { ++i; }
        }
        return feedIds;
    }
    function _lift(LibSecp256k1.Point memory pubKey, ECDSAData memory ecdsaData)
        internal
        returns (uint8)
    {
        address feed = pubKey.toAddress();
        // assert(feed != address(0));
        // forgefmt: disable-next-item
        address recovered = ecrecover(
            feedRegistrationMessage,
            ecdsaData.v,
            ecdsaData.r,
            ecdsaData.s
        );
        require(feed == recovered);
        uint8 feedId = uint8(uint(uint160(feed)) >> 152);
        LibSecp256k1.Point memory sPubKey = _pubKeys[feedId];
        if (sPubKey.isZeroPoint()) {
            _pubKeys[feedId] = pubKey;
            emit FeedLifted(msg.sender, feed);
        } else {
            // Note to be idempotent. However, disallow updating an id's feed
            // via lifting without dropping the previous feed.
            require(feed == sPubKey.toAddress());
        }
        return feedId;
    }
    /// @inheritdoc IScribe
    function drop(uint8 feedId) external auth {
        _drop(msg.sender, feedId);
    }
    /// @inheritdoc IScribe
    function drop(uint8[] memory feedIds) external auth {
        for (uint i; i < feedIds.length;) {
            _drop(msg.sender, feedIds[i]);
            // forgefmt: disable-next-item
            unchecked { ++i; }
        }
    }
    function _drop(address caller, uint8 feedId) internal virtual {
        LibSecp256k1.Point memory pubKey = _pubKeys[feedId];
        if (!pubKey.isZeroPoint()) {
            delete _pubKeys[feedId];
            emit FeedDropped(caller, pubKey.toAddress());
        }
    }
    /// @inheritdoc IScribe
    function setBar(uint8 bar_) external auth {
        _setBar(bar_);
    }
    function _setBar(uint8 bar_) internal virtual {
        require(bar_ != 0);
        if (bar != bar_) {
            emit BarUpdated(msg.sender, bar, bar_);
            bar = bar_;
        }
    }
    // -- Internal Helpers --
    function _revert(bytes memory err) internal pure {
        // assert(err.length != 0);
        assembly ("memory-safe") {
            let size := mload(err)
            let offset := add(err, 0x20)
            revert(offset, size)
        }
    }
    function _errorBarNotReached(uint8 got, uint8 want)
        internal
        pure
        returns (bytes memory)
    {
        // assert(got != want);
        return abi.encodeWithSelector(IScribe.BarNotReached.selector, got, want);
    }
    function _errorInvalidFeedId(uint8 feedId)
        internal
        pure
        returns (bytes memory)
    {
        // assert(_pubKeys[feedId].isZeroPoint());
        return abi.encodeWithSelector(IScribe.InvalidFeedId.selector, feedId);
    }
    function _errorDoubleSigningAttempted(uint8 feedId)
        internal
        pure
        returns (bytes memory)
    {
        return abi.encodeWithSelector(
            IScribe.DoubleSigningAttempted.selector, feedId
        );
    }
    function _errorSchnorrSignatureInvalid()
        internal
        pure
        returns (bytes memory)
    {
        return abi.encodeWithSelector(IScribe.SchnorrSignatureInvalid.selector);
    }
    // -- Overridden Toll Functions --
    /// @dev Defines authorization for IToll's authenticated functions.
    function toll_auth() internal override(Toll) auth {}
}
/**
 * @dev Contract overwrite to deploy contract instances with specific naming.
 *
 *      For more info, see docs/Deployment.md.
 */
contract Chronicle_MOG_USD_1 is Scribe {
    constructor(address initialAuthed, bytes32 wat_)
        Scribe(initialAuthed, wat_)
    {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {LibSecp256k1} from "./LibSecp256k1.sol";
/**
 * @title LibSchnorr
 *
 * @notice Custom-purpose library for Schnorr signature verification on the
 *         secp256k1 curve
 */
library LibSchnorr {
    using LibSecp256k1 for LibSecp256k1.Point;
    /// @dev Returns whether `signature` and `commitment` sign via `pubKey`
    ///      message `message`.
    ///
    /// @custom:invariant Reverts iff out of gas.
    /// @custom:invariant Uses constant amount of gas.
    function verifySignature(
        LibSecp256k1.Point memory pubKey,
        bytes32 message,
        bytes32 signature,
        address commitment
    ) internal pure returns (bool) {
        // Return false if signature or commitment is zero.
        if (signature == 0 || commitment == address(0)) {
            return false;
        }
        // Note to enforce pubKey is valid secp256k1 point.
        //
        // While the Scribe contract ensures to only verify signatures for valid
        // public keys, this check is enabled as an additional defense
        // mechanism.
        if (!pubKey.isOnCurve()) {
            return false;
        }
        // Note to enforce signature is less than Q to prevent signature
        // malleability.
        //
        // While the Scribe contract only accepts messages with strictly
        // monotonically increasing timestamps, circumventing replay attack
        // vectors and therefore also signature malleability issues at a higher
        // level, this check is enabled as an additional defense mechanism.
        if (uint(signature) >= LibSecp256k1.Q()) {
            return false;
        }
        // Construct challenge = H(Pₓ ‖ Pₚ ‖ m ‖ Rₑ) mod Q
        uint challenge = uint(
            keccak256(
                abi.encodePacked(
                    pubKey.x, uint8(pubKey.yParity()), message, commitment
                )
            )
        ) % LibSecp256k1.Q();
        // Compute msgHash = -sig * Pₓ      (mod Q)
        //                 = Q - (sig * Pₓ) (mod Q)
        //
        // Unchecked because the only protected operation performed is the
        // subtraction from Q where the subtrahend is the result of a (mod Q)
        // computation, i.e. the subtrahend is guaranteed to be less than Q.
        uint msgHash;
        unchecked {
            msgHash = LibSecp256k1.Q()
                - mulmod(uint(signature), pubKey.x, LibSecp256k1.Q());
        }
        // Compute v = Pₚ + 27
        //
        // Unchecked because pubKey.yParity() ∊ {0, 1} which cannot overflow
        // by adding 27.
        uint v;
        unchecked {
            v = pubKey.yParity() + 27;
        }
        // Set r = Pₓ
        uint r = pubKey.x;
        // Compute s = Q - (e * Pₓ) (mod Q)
        //
        // Unchecked because the only protected operation performed is the
        // subtraction from Q where the subtrahend is the result of a (mod Q)
        // computation, i.e. the subtrahend is guaranteed to be less than Q.
        uint s;
        unchecked {
            s = LibSecp256k1.Q() - mulmod(challenge, pubKey.x, LibSecp256k1.Q());
        }
        // Compute ([s]G - [e]P)ₑ via ecrecover.
        address recovered =
            ecrecover(bytes32(msgHash), uint8(v), bytes32(r), bytes32(s));
        // Verification succeeds iff ([s]G - [e]P)ₑ = Rₑ.
        //
        // Note that commitment is guaranteed to not be zero.
        return commitment == recovered;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
/**
 * @title LibSecp256k1
 *
 * @notice Library for secp256k1 elliptic curve computations
 *
 * @dev This library was developed to efficiently compute aggregated public
 *      keys for Schnorr signatures based on secp256k1, i.e. it is _not_ a
 *      general purpose elliptic curve library!
 *
 *      References to the Ethereum Yellow Paper are based on the following
 *      version: "BERLIN VERSION beacfbd – 2022-10-24".
 */
library LibSecp256k1 {
    using LibSecp256k1 for LibSecp256k1.Point;
    using LibSecp256k1 for LibSecp256k1.JacobianPoint;
    uint private constant ADDRESS_MASK =
        0x000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
    // -- Secp256k1 Constants --
    //
    // Taken from https://www.secg.org/sec2-v2.pdf.
    // See section 2.4.1 "Recommended Parameters secp256k1".
    uint private constant _A = 0;
    uint private constant _B = 7;
    uint private constant _P =
        0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F;
    /// @dev Returns the order of the group.
    function Q() internal pure returns (uint) {
        return
            0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141;
    }
    /// @dev Returns the generator G.
    ///      Note that the generator is also called base point.
    function G() internal pure returns (Point memory) {
        return Point({
            x: 0x79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,
            y: 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8
        });
    }
    /// @dev Returns the zero point.
    function ZERO_POINT() internal pure returns (Point memory) {
        return Point({x: 0, y: 0});
    }
    // -- (Affine) Point --
    /// @dev Point encapsulates a secp256k1 point in Affine coordinates.
    struct Point {
        uint x;
        uint y;
    }
    /// @dev Returns the Ethereum address of `self`.
    ///
    /// @dev An Ethereum address is defined as the rightmost 160 bits of the
    ///      keccak256 hash of the concatenation of the hex-encoded x and y
    ///      coordinates of the corresponding ECDSA public key.
    ///      See "Appendix F: Signing Transactions" §134 in the Yellow Paper.
    function toAddress(Point memory self) internal pure returns (address) {
        address addr;
        // Functionally equivalent Solidity code:
        // addr = address(uint160(uint(keccak256(abi.encode(self.x, self.y)))));
        assembly ("memory-safe") {
            addr := and(keccak256(self, 0x40), ADDRESS_MASK)
        }
        return addr;
    }
    /// @dev Returns Affine point `self` in Jacobian coordinates.
    function toJacobian(Point memory self)
        internal
        pure
        returns (JacobianPoint memory)
    {
        return JacobianPoint({x: self.x, y: self.y, z: 1});
    }
    /// @dev Returns whether `self` is the zero point.
    function isZeroPoint(Point memory self) internal pure returns (bool) {
        return (self.x | self.y) == 0;
    }
    /// @dev Returns whether `self` is a point on the curve.
    ///
    /// @dev The secp256k1 curve is specified as y² ≡ x³ + ax + b (mod P)
    ///      where:
    ///         a = 0
    ///         b = 7
    function isOnCurve(Point memory self) internal pure returns (bool) {
        uint left = mulmod(self.y, self.y, _P);
        // Note that adding a * x can be waived as ∀x: a * x = 0.
        uint right =
            addmod(mulmod(self.x, mulmod(self.x, self.x, _P), _P), _B, _P);
        return left == right;
    }
    /// @dev Returns the parity of `self`'s y coordinate.
    ///
    /// @dev The value 0 represents an even y value and 1 represents an odd y
    ///      value.
    ///      See "Appendix F: Signing Transactions" in the Yellow Paper.
    function yParity(Point memory self) internal pure returns (uint) {
        return self.y & 1;
    }
    // -- Jacobian Point --
    /// @dev JacobianPoint encapsulates a secp256k1 point in Jacobian
    ///      coordinates.
    struct JacobianPoint {
        uint x;
        uint y;
        uint z;
    }
    /// @dev Returns Jacobian point `self` in Affine coordinates.
    ///
    /// @custom:invariant Reverts iff out of gas.
    /// @custom:invariant Does not run into an infinite loop.
    function toAffine(JacobianPoint memory self)
        internal
        pure
        returns (Point memory)
    {
        Point memory result;
        // Compute z⁻¹, i.e. the modular inverse of self.z.
        uint zInv = _invMod(self.z);
        // Compute (z⁻¹)² (mod P)
        uint zInv_2 = mulmod(zInv, zInv, _P);
        // Compute self.x * (z⁻¹)² (mod P), i.e. the x coordinate of given
        // Jacobian point in Affine representation.
        result.x = mulmod(self.x, zInv_2, _P);
        // Compute self.y * (z⁻¹)³ (mod P), i.e. the y coordinate of given
        // Jacobian point in Affine representation.
        result.y = mulmod(self.y, mulmod(zInv, zInv_2, _P), _P);
        return result;
    }
    /// @dev Adds Affine point `p` to Jacobian point `self`.
    ///
    ///      It is the caller's responsibility to ensure given points are on the
    ///      curve!
    ///
    ///      Computation based on: https://www.hyperelliptic.org/EFD/g1p/auto-shortw-jacobian.html#addition-madd-2007-bl.
    ///
    ///      Note that the formula assumes z2 = 1, which always holds if z2's
    ///      point is given in Affine coordinates.
    ///
    ///      Note that eventhough the function is marked as pure, to be
    ///      understood as only being dependent on the input arguments, it
    ///      nevertheless has side effects by writing the result into the
    ///      `self` memory variable.
    ///
    /// @custom:invariant Only mutates `self` memory variable.
    /// @custom:invariant Reverts iff out of gas.
    /// @custom:invariant Uses constant amount of gas.
    function addAffinePoint(JacobianPoint memory self, Point memory p)
        internal
        pure
    {
        // Addition formula:
        //      x = r² - j - (2 * v)             (mod P)
        //      y = (r * (v - x)) - (2 * y1 * j) (mod P)
        //      z = (z1 + h)² - z1² - h²         (mod P)
        //
        // where:
        //      r = 2 * (s - y1) (mod P)
        //      j = h * i        (mod P)
        //      v = x1 * i       (mod P)
        //      h = u - x1       (mod P)
        //      s = y2 * z1³     (mod P)       Called s2 in reference
        //      i = 4 * h²       (mod P)
        //      u = x2 * z1²     (mod P)       Called u2 in reference
        //
        // and:
        //      x1 = self.x
        //      y1 = self.y
        //      z1 = self.z
        //      x2 = p.x
        //      y2 = p.y
        //
        // Note that in order to save memory allocations the result is stored
        // in the self variable, i.e. the following holds true after the
        // functions execution:
        //      x = self.x
        //      y = self.y
        //      z = self.z
        // Cache self's coordinates on stack.
        uint x1 = self.x;
        uint y1 = self.y;
        uint z1 = self.z;
        // Compute z1_2 = z1²     (mod P)
        //              = z1 * z1 (mod P)
        uint z1_2 = mulmod(z1, z1, _P);
        // Compute h = u        - x1       (mod P)
        //           = u        + (P - x1) (mod P)
        //           = x2 * z1² + (P - x1) (mod P)
        //
        // Unchecked because the only protected operation performed is P - x1
        // where x1 is guaranteed by the caller to be an x coordinate belonging
        // to a point on the curve, i.e. being less than P.
        uint h;
        unchecked {
            h = addmod(mulmod(p.x, z1_2, _P), _P - x1, _P);
        }
        // Compute h_2 = h²    (mod P)
        //             = h * h (mod P)
        uint h_2 = mulmod(h, h, _P);
        // Compute i = 4 * h² (mod P)
        uint i = mulmod(4, h_2, _P);
        // Compute z = (z1 + h)² - z1²       - h²       (mod P)
        //           = (z1 + h)² - z1²       + (P - h²) (mod P)
        //           = (z1 + h)² + (P - z1²) + (P - h²) (mod P)
        //             ╰───────╯   ╰───────╯   ╰──────╯
        //               left         mid       right
        //
        // Unchecked because the only protected operations performed are
        // subtractions from P where the subtrahend is the result of a (mod P)
        // computation, i.e. the subtrahend being guaranteed to be less than P.
        unchecked {
            uint left = mulmod(addmod(z1, h, _P), addmod(z1, h, _P), _P);
            uint mid = _P - z1_2;
            uint right = _P - h_2;
            self.z = addmod(left, addmod(mid, right, _P), _P);
        }
        // Compute v = x1 * i (mod P)
        uint v = mulmod(x1, i, _P);
        // Compute j = h * i (mod P)
        uint j = mulmod(h, i, _P);
        // Compute r = 2 * (s               - y1)       (mod P)
        //           = 2 * (s               + (P - y1)) (mod P)
        //           = 2 * ((y2 * z1³)      + (P - y1)) (mod P)
        //           = 2 * ((y2 * z1² * z1) + (P - y1)) (mod P)
        //
        // Unchecked because the only protected operation performed is P - y1
        // where y1 is guaranteed by the caller to be an y coordinate belonging
        // to a point on the curve, i.e. being less than P.
        uint r;
        unchecked {
            r = mulmod(
                2,
                addmod(mulmod(p.y, mulmod(z1_2, z1, _P), _P), _P - y1, _P),
                _P
            );
        }
        // Compute x = r² - j - (2 * v)             (mod P)
        //           = r² - j + (P - (2 * v))       (mod P)
        //           = r² + (P - j) + (P - (2 * v)) (mod P)
        //                  ╰─────╯   ╰───────────╯
        //                    mid         right
        //
        // Unchecked because the only protected operations performed are
        // subtractions from P where the subtrahend is the result of a (mod P)
        // computation, i.e. the subtrahend being guaranteed to be less than P.
        unchecked {
            uint r_2 = mulmod(r, r, _P);
            uint mid = _P - j;
            uint right = _P - mulmod(2, v, _P);
            self.x = addmod(r_2, addmod(mid, right, _P), _P);
        }
        // Compute y = (r * (v - x))       - (2 * y1 * j)       (mod P)
        //           = (r * (v - x))       + (P - (2 * y1 * j)) (mod P)
        //           = (r * (v + (P - x))) + (P - (2 * y1 * j)) (mod P)
        //             ╰─────────────────╯   ╰────────────────╯
        //                    left                 right
        //
        // Unchecked because the only protected operations performed are
        // subtractions from P where the subtrahend is the result of a (mod P)
        // computation, i.e. the subtrahend being guaranteed to be less than P.
        unchecked {
            uint left = mulmod(r, addmod(v, _P - self.x, _P), _P);
            uint right = _P - mulmod(2, mulmod(y1, j, _P), _P);
            self.y = addmod(left, right, _P);
        }
    }
    // -- Private Helpers --
    /// @dev Returns the modular inverse of `x` for modulo `_P`.
    ///
    ///      It is the caller's responsibility to ensure `x` is less than `_P`!
    ///
    ///      The modular inverse of `x` is x⁻¹ such that x * x⁻¹ ≡ 1 (mod P).
    ///
    /// @dev Modified from Jordi Baylina's [ecsol](https://github.com/jbaylina/ecsol/blob/c2256afad126b7500e6f879a9369b100e47d435d/ec.sol#L51-L67).
    ///
    /// @custom:invariant Reverts iff out of gas.
    /// @custom:invariant Does not run into an infinite loop.
    function _invMod(uint x) private pure returns (uint) {
        uint t;
        uint q;
        uint newT = 1;
        uint r = _P;
        assembly ("memory-safe") {
            // Implemented in assembly to circumvent division-by-zero
            // and over-/underflow protection.
            //
            // Functionally equivalent Solidity code:
            //      while (x != 0) {
            //          q = r / x;
            //          (t, newT) = (newT, addmod(t, (_P - mulmod(q, newT, _P)), _P));
            //          (r, x) = (x, r - (q * x));
            //      }
            //
            // For the division r / x, x is guaranteed to not be zero via the
            // loop condition.
            //
            // The subtraction of form P - mulmod(_, _, P) is guaranteed to not
            // underflow due to the subtrahend being a (mod P) result,
            // i.e. the subtrahend being guaranteed to be less than P.
            //
            // The subterm q * x is guaranteed to not overflow because
            // q * x ≤ r due to q = ⎣r / x⎦.
            //
            // The term r - (q * x) is guaranteed to not underflow because
            // q * x ≤ r and therefore r - (q * x) ≥ 0.
            for {} x {} {
                q := div(r, x)
                let tmp := t
                t := newT
                newT := addmod(tmp, sub(_P, mulmod(q, newT, _P)), _P)
                tmp := r
                r := x
                x := sub(tmp, mul(q, x))
            }
        }
        return t;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {IAuth} from "./IAuth.sol";
/**
 * @title Auth Module
 *
 * @dev The `Auth` contract module provides a basic access control mechanism,
 *      where a set of addresses are granted access to protected functions.
 *      These addresses are said to be _auth'ed_.
 *
 *      Initially, the address given as constructor argument is the only address
 *      auth'ed. Through the `rely(address)` and `deny(address)` functions,
 *      auth'ed callers are able to grant/renounce auth to/from addresses.
 *
 *      This module is used through inheritance. It will make available the
 *      modifier `auth`, which can be applied to functions to restrict their
 *      use to only auth'ed callers.
 */
abstract contract Auth is IAuth {
    /// @dev Mapping storing whether address is auth'ed.
    /// @custom:invariant Image of mapping is {0, 1}.
    ///                     ∀x ∊ Address: _wards[x] ∊ {0, 1}
    /// @custom:invariant Only address given as constructor argument is authenticated after deployment.
    ///                     deploy(initialAuthed) → (∀x ∊ Address: _wards[x] == 1 → x == initialAuthed)
    /// @custom:invariant Only functions `rely` and `deny` may mutate the mapping's state.
    ///                     ∀x ∊ Address: preTx(_wards[x]) != postTx(_wards[x])
    ///                                     → (msg.sig == "rely" ∨ msg.sig == "deny")
    /// @custom:invariant Mapping's state may only be mutated by authenticated caller.
    ///                     ∀x ∊ Address: preTx(_wards[x]) != postTx(_wards[x]) → _wards[msg.sender] = 1
    mapping(address => uint) private _wards;
    /// @dev List of addresses possibly being auth'ed.
    /// @dev May contain duplicates.
    /// @dev May contain addresses not being auth'ed anymore.
    /// @custom:invariant Every address being auth'ed once is element of the list.
    ///                     ∀x ∊ Address: authed(x) -> x ∊ _wardsTouched
    address[] private _wardsTouched;
    /// @dev Ensures caller is auth'ed.
    modifier auth() {
        assembly ("memory-safe") {
            // Compute slot of _wards[msg.sender].
            mstore(0x00, caller())
            mstore(0x20, _wards.slot)
            let slot := keccak256(0x00, 0x40)
            // Revert if caller not auth'ed.
            let isAuthed := sload(slot)
            if iszero(isAuthed) {
                // Store selector of `NotAuthorized(address)`.
                mstore(0x00, 0x4a0bfec1)
                // Store msg.sender.
                mstore(0x20, caller())
                // Revert with (offset, size).
                revert(0x1c, 0x24)
            }
        }
        _;
    }
    constructor(address initialAuthed) {
        _wards[initialAuthed] = 1;
        _wardsTouched.push(initialAuthed);
        // Note to use address(0) as caller to indicate address was auth'ed
        // during deployment.
        emit AuthGranted(address(0), initialAuthed);
    }
    /// @inheritdoc IAuth
    function rely(address who) external auth {
        if (_wards[who] == 1) return;
        _wards[who] = 1;
        _wardsTouched.push(who);
        emit AuthGranted(msg.sender, who);
    }
    /// @inheritdoc IAuth
    function deny(address who) external auth {
        if (_wards[who] == 0) return;
        _wards[who] = 0;
        emit AuthRenounced(msg.sender, who);
    }
    /// @inheritdoc IAuth
    function authed(address who) public view returns (bool) {
        return _wards[who] == 1;
    }
    /// @inheritdoc IAuth
    /// @custom:invariant Only contains auth'ed addresses.
    ///                     ∀x ∊ authed(): _wards[x] == 1
    /// @custom:invariant Contains all auth'ed addresses.
    ///                     ∀x ∊ Address: _wards[x] == 1 → x ∊ authed()
    function authed() public view returns (address[] memory) {
        // Initiate array with upper limit length.
        address[] memory wardsList = new address[](_wardsTouched.length);
        // Iterate through all possible auth'ed addresses.
        uint ctr;
        for (uint i; i < wardsList.length; i++) {
            // Add address only if still auth'ed.
            if (_wards[_wardsTouched[i]] == 1) {
                wardsList[ctr++] = _wardsTouched[i];
            }
        }
        // Set length of array to number of auth'ed addresses actually included.
        assembly ("memory-safe") {
            mstore(wardsList, ctr)
        }
        return wardsList;
    }
    /// @inheritdoc IAuth
    function wards(address who) public view returns (uint) {
        return _wards[who];
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {IToll} from "./IToll.sol";
/**
 * @title Toll Module
 *
 * @notice "Toll paid, we kiss - but dissension looms, maybe diss?"
 *
 * @dev The `Toll` contract module provides a basic access control mechanism,
 *      where a set of addresses are granted access to protected functions.
 *      These addresses are said the be _tolled_.
 *
 *      Initially, no address is tolled. Through the `kiss(address)` and
 *      `diss(address)` functions, auth'ed callers are able to toll/de-toll
 *      addresses. Authentication for these functions is defined via the
 *      downstream implemented `toll_auth()` function.
 *
 *      This module is used through inheritance. It will make available the
 *      modifier `toll`, which can be applied to functions to restrict their
 *      use to only tolled callers.
 */
abstract contract Toll is IToll {
    /// @dev Mapping storing whether address is tolled.
    /// @custom:invariant Image of mapping is {0, 1}.
    ///                     ∀x ∊ Address: _buds[x] ∊ {0, 1}
    /// @custom:invariant Only functions `kiss` and `diss` may mutate the mapping's state.
    ///                     ∀x ∊ Address: preTx(_buds[x]) != postTx(_buds[x])
    ///                                     → (msg.sig == "kiss" ∨ msg.sig == "diss")
    /// @custom:invariant Mapping's state may only be mutated by authenticated caller.
    ///                     ∀x ∊ Address: preTx(_buds[x]) != postTx(_buds[x])
    ///                                     → toll_auth()
    mapping(address => uint) private _buds;
    /// @dev List of addresses possibly being tolled.
    /// @dev May contain duplicates.
    /// @dev May contain addresses not being tolled anymore.
    /// @custom:invariant Every address being tolled once is element of the list.
    ///                     ∀x ∊ Address: tolled(x) → x ∊ _budsTouched
    address[] private _budsTouched;
    /// @dev Ensures caller is tolled.
    modifier toll() {
        assembly ("memory-safe") {
            // Compute slot of _buds[msg.sender].
            mstore(0x00, caller())
            mstore(0x20, _buds.slot)
            let slot := keccak256(0x00, 0x40)
            // Revert if caller not tolled.
            let isTolled := sload(slot)
            if iszero(isTolled) {
                // Store selector of `NotTolled(address)`.
                mstore(0x00, 0xd957b595)
                // Store msg.sender.
                mstore(0x20, caller())
                // Revert with (offset, size).
                revert(0x1c, 0x24)
            }
        }
        _;
    }
    /// @dev Reverts if caller not allowed to access protected function.
    /// @dev Must be implemented in downstream contract.
    function toll_auth() internal virtual;
    /// @inheritdoc IToll
    function kiss(address who) external {
        toll_auth();
        if (_buds[who] == 1) return;
        _buds[who] = 1;
        _budsTouched.push(who);
        emit TollGranted(msg.sender, who);
    }
    /// @inheritdoc IToll
    function diss(address who) external {
        toll_auth();
        if (_buds[who] == 0) return;
        _buds[who] = 0;
        emit TollRenounced(msg.sender, who);
    }
    /// @inheritdoc IToll
    function tolled(address who) public view returns (bool) {
        return _buds[who] == 1;
    }
    /// @inheritdoc IToll
    /// @custom:invariant Only contains tolled addresses.
    ///                     ∀x ∊ tolled(): _tolled[x]
    /// @custom:invariant Contains all tolled addresses.
    ///                     ∀x ∊ Address: _tolled[x] == 1 → x ∊ tolled()
    function tolled() public view returns (address[] memory) {
        // Initiate array with upper limit length.
        address[] memory budsList = new address[](_budsTouched.length);
        // Iterate through all possible tolled addresses.
        uint ctr;
        for (uint i; i < budsList.length; i++) {
            // Add address only if still tolled.
            if (_buds[_budsTouched[i]] == 1) {
                budsList[ctr++] = _budsTouched[i];
            }
        }
        // Set length of array to number of tolled addresses actually included.
        assembly ("memory-safe") {
            mstore(budsList, ctr)
        }
        return budsList;
    }
    /// @inheritdoc IToll
    function bud(address who) public view returns (uint) {
        return _buds[who];
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IAuth {
    /// @notice Thrown by protected function if caller not auth'ed.
    /// @param caller The caller's address.
    error NotAuthorized(address caller);
    /// @notice Emitted when auth granted to address.
    /// @param caller The caller's address.
    /// @param who The address auth got granted to.
    event AuthGranted(address indexed caller, address indexed who);
    /// @notice Emitted when auth renounced from address.
    /// @param caller The caller's address.
    /// @param who The address auth got renounced from.
    event AuthRenounced(address indexed caller, address indexed who);
    /// @notice Grants address `who` auth.
    /// @dev Only callable by auth'ed address.
    /// @param who The address to grant auth.
    function rely(address who) external;
    /// @notice Renounces address `who`'s auth.
    /// @dev Only callable by auth'ed address.
    /// @param who The address to renounce auth.
    function deny(address who) external;
    /// @notice Returns whether address `who` is auth'ed.
    /// @param who The address to check.
    /// @return True if `who` is auth'ed, false otherwise.
    function authed(address who) external view returns (bool);
    /// @notice Returns full list of addresses granted auth.
    /// @dev May contain duplicates.
    /// @return List of addresses granted auth.
    function authed() external view returns (address[] memory);
    /// @notice Returns whether address `who` is auth'ed.
    /// @custom:deprecated Use `authed(address)(bool)` instead.
    /// @param who The address to check.
    /// @return 1 if `who` is auth'ed, 0 otherwise.
    function wards(address who) external view returns (uint);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IToll {
    /// @notice Thrown by protected function if caller not tolled.
    /// @param caller The caller's address.
    error NotTolled(address caller);
    /// @notice Emitted when toll granted to address.
    /// @param caller The caller's address.
    /// @param who The address toll got granted to.
    event TollGranted(address indexed caller, address indexed who);
    /// @notice Emitted when toll renounced from address.
    /// @param caller The caller's address.
    /// @param who The address toll got renounced from.
    event TollRenounced(address indexed caller, address indexed who);
    /// @notice Grants address `who` toll.
    /// @dev Only callable by auth'ed address.
    /// @param who The address to grant toll.
    function kiss(address who) external;
    /// @notice Renounces address `who`'s toll.
    /// @dev Only callable by auth'ed address.
    /// @param who The address to renounce toll.
    function diss(address who) external;
    /// @notice Returns whether address `who` is tolled.
    /// @param who The address to check.
    /// @return True if `who` is tolled, false otherwise.
    function tolled(address who) external view returns (bool);
    /// @notice Returns full list of addresses tolled.
    /// @dev May contain duplicates.
    /// @return List of addresses tolled.
    function tolled() external view returns (address[] memory);
    /// @notice Returns whether address `who` is tolled.
    /// @custom:deprecated Use `tolled(address)(bool)` instead.
    /// @param who The address to check.
    /// @return 1 if `who` is tolled, 0 otherwise.
    function bud(address who) external view returns (uint);
}