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// contracts/Oracle.sol
// SPDX-License-Identifier: UNLICENSED
// Copyright © 2023 SolarExplorer

pragma solidity ^0.8.14;

import "periphery/Operatable.sol";
import "interfaces/IOracle.sol";

contract Oracle is IOracle, Operatable {
    // EIP712 related variables and functions
    bytes32 private constant DOMAIN_SEPARATOR_SIGNATURE_HASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
    // See https://eips.ethereum.org/EIPS/eip-191
    string private constant EIP191_PREFIX_FOR_EIP712_STRUCTURED_DATA = "\x19\x01";
    bytes32 private constant APPROVAL_SIGNATURE_HASH = keccak256("LogUpdateObservation(uint144 value,uint256 deadline)");

    // solhint-disable-next-line var-name-mixedcase
    bytes32 private immutable _DOMAIN_SEPARATOR;
    // solhint-disable-next-line var-name-mixedcase
    uint256 private immutable DOMAIN_SEPARATOR_CHAIN_ID;

    uint256 public constant PRECISION = 1e6;
    uint256 public constant HEARTBEAT = 5 minutes;
    uint8 public constant FROZEN = 1;
    uint8 public constant UNFROZEN = 0;

    uint256 public latestInteraction;

    struct StorageType {
        uint144 observation;
        uint64 lastUpdate;
        uint32 deltaPercentage;
        uint8 frozen;
        uint8 signerThreshold;
    }

    StorageType public observation;

    event LogMaxDeltaPercentageChanged(uint256 timestamp, uint32 maxDeltaPercentage);
    event LogFrozenChanged(uint256 timestamp, uint8 frozen);
    event LogSignerThresholdChanged(uint256 timestamp, uint8 signerThreshold);
    event LogUpdateObservation(uint256 timestamp, uint144 observation);

    constructor(address to) {
        // Set default roles
        emit OwnershipTransferred(owner, to);
        owner = to;

        uint256 chainId;
        assembly {
            chainId := chainid()
        }

        _DOMAIN_SEPARATOR = _calculateDomainSeparator(DOMAIN_SEPARATOR_CHAIN_ID = chainId);
    }

    function _calculateDomainSeparator(uint256 chainId) private view returns (bytes32) {
        return keccak256(abi.encode(DOMAIN_SEPARATOR_SIGNATURE_HASH, keccak256("Oracle"), chainId, address(this)));
    }

    function DOMAIN_SEPARATOR() public view returns (bytes32) {
        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        return chainId == DOMAIN_SEPARATOR_CHAIN_ID ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(chainId);
    }

    function _checkDeltaPercentage(uint256 existingValue, uint256 updatedValue, uint256 maxDelta) internal pure {
        uint256 deltaPercentage;

        if (existingValue <= updatedValue) {
            deltaPercentage = PRECISION - (PRECISION * existingValue / updatedValue);
        } else {
            deltaPercentage = PRECISION - (PRECISION * updatedValue / existingValue);
        }

        require(deltaPercentage < maxDelta, "Delta percentage");
    }

    function _verifySignature(address signer, uint144 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) internal view {
        require(operators[signer], "Oracle: not operator");

        // Also, ecrecover returns address(0) on failure. So we check this.
        require(signer != address(0), "PermissionMgr: Operator cannot be 0");

        require(deadline >= block.timestamp && deadline <= (block.timestamp + 15 minutes), 'Oracle: EXPIRED');

        bytes32 digest =
            keccak256(
                abi.encodePacked(
                    EIP191_PREFIX_FOR_EIP712_STRUCTURED_DATA,
                    DOMAIN_SEPARATOR(),
                    keccak256(
                        abi.encode(
                            APPROVAL_SIGNATURE_HASH,
                            value,
                            deadline
                        )
                    )
                )
            );

        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress == signer, "Oracle: Invalid Signature");
    }

    function updateObservation(uint144 value, address[] calldata signers, uint256[] calldata deadline, uint8[] calldata v, bytes32[] calldata r, bytes32[] calldata s) external {
        StorageType memory oldObservation = observation;

        require(signers.length >= oldObservation.signerThreshold, "Too few signers");
        require(block.timestamp != oldObservation.lastUpdate, "Cooldown period");

        address lastSigner;

        for (uint256 i = 0; i < signers.length; i++) {
            require(signers[i] > lastSigner, "Duplicated signer");

            _verifySignature(signers[i], value, deadline[i], v[i], r[i], s[i]);
            lastSigner = signers[i];
        }

        if (oldObservation.observation != 0) {
            _checkDeltaPercentage(uint256(oldObservation.observation), uint256(value), uint256(oldObservation.deltaPercentage));
        }

        observation = StorageType(value, uint64(block.timestamp), oldObservation.deltaPercentage, oldObservation.frozen, oldObservation.signerThreshold);
        emit LogUpdateObservation(block.timestamp, value);
    }

    function get(bytes memory) public view override returns (bool, uint256) {
        StorageType memory oldObservation = observation;
        bool isValid = oldObservation.frozen != FROZEN && block.timestamp - oldObservation.lastUpdate < HEARTBEAT;
        return (isValid, uint256(oldObservation.observation));
    }

    function freeze() external onlyOperators {
        observation.frozen = FROZEN;
        emit LogFrozenChanged(block.timestamp, FROZEN);
    }

    function setMaximumDeltaPercentage(uint32 maximumDeltaPercentage) external onlyOwner {
        observation.deltaPercentage = maximumDeltaPercentage;
        emit LogMaxDeltaPercentageChanged(block.timestamp, maximumDeltaPercentage);
    }

    function unfreeze() external onlyOwner {
        observation.frozen = UNFROZEN;
        emit LogFrozenChanged(block.timestamp, UNFROZEN);
    }

    function setThreshold(uint8 threshold) external onlyOwner {
        observation.signerThreshold = threshold;
        emit LogSignerThresholdChanged(block.timestamp, threshold);
    }

    // Check the last exchange rate without any state changes
    /// @inheritdoc IOracle
    function peek(bytes calldata data) public view override returns (bool, uint256) {
        return get(data);
    }

    // Check the current spot exchange rate without any state changes
    /// @inheritdoc IOracle
    function peekSpot(bytes calldata data) external view override returns (uint256 rate) {
        (,rate) = peek(data); 
    }

    /// @inheritdoc IOracle
    function name(bytes calldata) public pure override returns (string memory) {
        return "Oracle";
    }

    /// @inheritdoc IOracle
    function symbol(bytes calldata) public pure override returns (string memory) {
        return "Oracle";
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// Source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol + Claimable.sol
// Simplified by BoringCrypto

contract BoringOwnableData {
    address public owner;
    address public pendingOwner;
}

contract BoringOwnable is BoringOwnableData {
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /// @notice `owner` defaults to msg.sender on construction.
    constructor() {
        owner = msg.sender;
        emit OwnershipTransferred(address(0), msg.sender);
    }

    /// @notice Transfers ownership to `newOwner`. Either directly or claimable by the new pending owner.
    /// Can only be invoked by the current `owner`.
    /// @param newOwner Address of the new owner.
    /// @param direct True if `newOwner` should be set immediately. False if `newOwner` needs to use `claimOwnership`.
    /// @param renounce Allows the `newOwner` to be `address(0)` if `direct` and `renounce` is True. Has no effect otherwise.
    function transferOwnership(
        address newOwner,
        bool direct,
        bool renounce
    ) public onlyOwner {
        if (direct) {
            // Checks
            require(newOwner != address(0) || renounce, "Ownable: zero address");

            // Effects
            emit OwnershipTransferred(owner, newOwner);
            owner = newOwner;
            pendingOwner = address(0);
        } else {
            // Effects
            pendingOwner = newOwner;
        }
    }

    /// @notice Needs to be called by `pendingOwner` to claim ownership.
    function claimOwnership() public {
        address _pendingOwner = pendingOwner;

        // Checks
        require(msg.sender == _pendingOwner, "Ownable: caller != pending owner");

        // Effects
        emit OwnershipTransferred(owner, _pendingOwner);
        owner = _pendingOwner;
        pendingOwner = address(0);
    }

    /// @notice Only allows the `owner` to execute the function.
    modifier onlyOwner() {
        require(msg.sender == owner, "Ownable: caller is not the owner");
        _;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IERC20 {
    // transfer and tranferFrom have been removed, because they don't work on all tokens (some aren't ERC20 complaint).
    // By removing them you can't accidentally use them.
    // name, symbol and decimals have been removed, because they are optional and sometimes wrongly implemented (MKR).
    // Use BoringERC20 with `using BoringERC20 for IERC20` and call `safeTransfer`, `safeTransferFrom`, etc instead.
    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /// @notice EIP 2612
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}

interface IStrictERC20 {
    // This is the strict ERC20 interface. Don't use this, certainly not if you don't control the ERC20 token you're calling.
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
    function totalSupply() external view returns (uint256);
    function balanceOf(address _owner) external view returns (uint256 balance);
    function transfer(address _to, uint256 _value) external returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
    function approve(address _spender, uint256 _value) external returns (bool success);
    function allowance(address _owner, address _spender) external view returns (uint256 remaining);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /// @notice EIP 2612
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

interface IOracle {
    /// @notice Get the latest exchange rate.
    /// @param data Usually abi encoded, implementation specific data that contains information and arguments to & about the oracle.
    /// For example:
    /// (string memory collateralSymbol, string memory assetSymbol, uint256 division) = abi.decode(data, (string, string, uint256));
    /// @return success if no valid (recent) rate is available, return false else true.
    /// @return rate The rate of the requested asset / pair / pool.
    function get(bytes calldata data) external returns (bool success, uint256 rate);

    /// @notice Check the last exchange rate without any state changes.
    /// @param data Usually abi encoded, implementation specific data that contains information and arguments to & about the oracle.
    /// For example:
    /// (string memory collateralSymbol, string memory assetSymbol, uint256 division) = abi.decode(data, (string, string, uint256));
    /// @return success if no valid (recent) rate is available, return false else true.
    /// @return rate The rate of the requested asset / pair / pool.
    function peek(bytes calldata data) external view returns (bool success, uint256 rate);

    /// @notice Check the current spot exchange rate without any state changes. For oracles like TWAP this will be different from peek().
    /// @param data Usually abi encoded, implementation specific data that contains information and arguments to & about the oracle.
    /// For example:
    /// (string memory collateralSymbol, string memory assetSymbol, uint256 division) = abi.decode(data, (string, string, uint256));
    /// @return rate The rate of the requested asset / pair / pool.
    function peekSpot(bytes calldata data) external view returns (uint256 rate);

    /// @notice Returns a human readable (short) name about this oracle.
    /// @param data Usually abi encoded, implementation specific data that contains information and arguments to & about the oracle.
    /// For example:
    /// (string memory collateralSymbol, string memory assetSymbol, uint256 division) = abi.decode(data, (string, string, uint256));
    /// @return (string) A human readable symbol name about this oracle.
    function symbol(bytes calldata data) external view returns (string memory);

    /// @notice Returns a human readable name about this oracle.
    /// @param data Usually abi encoded, implementation specific data that contains information and arguments to & about the oracle.
    /// For example:
    /// (string memory collateralSymbol, string memory assetSymbol, uint256 division) = abi.decode(data, (string, string, uint256));
    /// @return (string) A human readable name about this oracle.
    function name(bytes calldata data) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import "BoringSolidity/interfaces/IERC20.sol";
import "BoringSolidity/BoringOwnable.sol";

contract Operatable is BoringOwnable {
    event OperatorChanged(address indexed, bool);
    error NotAllowedOperator();

    mapping(address => bool) public operators;

    constructor() {
        operators[msg.sender] = true;
    }

    modifier onlyOperators() {
        if (!operators[msg.sender]) {
            revert NotAllowedOperator();
        }
        _;
    }

    function setOperator(address operator, bool status) external onlyOwner {
        operators[operator] = status;
        emit OperatorChanged(operator, status);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 690
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "remappings": [
    "/=src/",
    "BoringSolidity/=lib/BoringSolidity/contracts/",
    "OpenZeppelin/=lib/openzeppelin-contracts/contracts/",
    "cauldrons/=src/cauldrons/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "interfaces/=src/interfaces/",
    "lenses/=src/lenses/",
    "libraries/=src/libraries/",
    "mocks/=src/mocks/",
    "oracles/=src/oracles/",
    "periphery/=src/periphery/",
    "solidity-stringutils/=lib/surl/lib/solidity-stringutils/src/",
    "solmate/=lib/solmate/src/",
    "strategies/=src/strategies/",
    "surl/=lib/surl/src/",
    "swappers/=src/swappers/",
    "tokens/=src/tokens/",
    "utils/=utils/",
    "OpenZeppelin-Upgrades/=lib/openzeppelin-contracts-upgradeable/contracts/"
  ],
  "libraries": {}
}

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0000000000000000000000001da4ebf84afae68915206855213a70a4fb693da6

-----Decoded View---------------
Arg [0] : to (address): 0x1dA4EbF84afAE68915206855213a70A4Fb693Da6

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000001da4ebf84afae68915206855213a70a4fb693da6