Contract 0x57ee47829369e2ef62fbb423648bec70d0366204 1

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "../../common/interfaces/ExpandedIERC20.sol";
import "../../common/interfaces/IERC20Standard.sol";
import "../../oracle/interfaces/FinderInterface.sol";
import "../../common/implementation/Testable.sol";
import "../../common/implementation/Lockable.sol";
import "../common/TokenFactory.sol";
import "./LongShortPair.sol";
import "../common/financial-product-libraries/long-short-pair-libraries/LongShortPairFinancialProductLibrary.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/**
 * @title Long Short Pair Contract Creator.
 * @notice Factory contract to create new instances of long short pair contracts.
 * Responsible for constraining the parameters used to construct a new LSP. These constraints can evolve over time and
 * are initially constrained to conservative values in this first iteration.
 */
contract LongShortPairCreator is Testable, Lockable {
    using FixedPoint for FixedPoint.Unsigned;
    using SafeERC20 for IERC20Standard;

    struct CreatorParams {
        string pairName;
        uint64 expirationTimestamp;
        uint256 collateralPerPair;
        bytes32 priceIdentifier;
        string longSynthName;
        string longSynthSymbol;
        string shortSynthName;
        string shortSynthSymbol;
        IERC20Standard collateralToken;
        LongShortPairFinancialProductLibrary financialProductLibrary;
        bytes customAncillaryData;
        uint256 prepaidProposerReward;
        uint256 optimisticOracleLivenessTime;
        uint256 optimisticOracleProposerBond;
    }

    // Address of TokenFactory used to create a new synthetic token.
    TokenFactory public tokenFactory;

    FinderInterface public finder;

    event CreatedLongShortPair(
        address indexed longShortPair,
        address indexed deployerAddress,
        address longToken,
        address shortToken
    );

    /**
     * @notice Constructs the LongShortPairCreator contract.
     * @param _finder UMA protocol Finder used to discover other protocol contracts.
     * @param _tokenFactory ERC20 token factory used to deploy synthetic token instances.
     * @param _timer Contract that stores the current time in a testing environment.
     */
    constructor(
        FinderInterface _finder,
        TokenFactory _tokenFactory,
        address _timer
    ) Testable(_timer) nonReentrant() {
        tokenFactory = _tokenFactory;
        finder = _finder;
    }

    /**
     * @notice Creates a longShortPair contract and associated long and short tokens.
     * @dev The caller must approve this contract to transfer `prepaidProposerReward` amount of collateral.
     * @param params Constructor params used to initialize the LSP. Key-valued object with the following structure:
     *    pairName: Name of the long short pair contract.
     *     expirationTimestamp: unix timestamp of when the contract will expire.
     *     collateralPerPair: how many units of collateral are required to mint one pair of synthetic tokens.
     *     priceIdentifier: registered in the DVM for the synthetic.
     *     longSynthName: Name of the long synthetic tokens to be created.
     *     longSynthSymbol: Symbol of the long synthetic tokens to be created.
     *     shortSynthName: Name of the short synthetic tokens to be created.
     *     shortSynthSymbol: Symbol of the short synthetic tokens to be created.
     *     collateralToken: ERC20 token used as collateral in the LSP.
     *     financialProductLibrary: Contract providing settlement payout logic.
     *     customAncillaryData: Custom ancillary data to be passed along with the price request. If not needed, this
     *                             should be left as a 0-length bytes array.
     *     prepaidProposerReward: Proposal reward forwarded to the created LSP to incentivize price proposals.
     *     optimisticOracleLivenessTime: Optimistic oracle liveness time for price requests.
           optimisticOracleProposerBond: optimistic oracle proposer bond for price requests.
     * @return lspAddress the deployed address of the new long short pair contract.
     * @notice Created LSP is not registered within the registry as the LSP uses the Optimistic Oracle for settlement.
     * @notice The LSP constructor does a number of validations on input params. These are not repeated here.
     */
    function createLongShortPair(CreatorParams memory params) public nonReentrant() returns (address) {
        // Create a new synthetic token using the params.
        require(bytes(params.longSynthName).length != 0, "Missing long synthetic name");
        require(bytes(params.shortSynthName).length != 0, "Missing short synthetic name");
        require(bytes(params.longSynthSymbol).length != 0, "Missing long synthetic symbol");
        require(bytes(params.shortSynthSymbol).length != 0, "Missing short synthetic symbol");

        // If the collateral token does not have a `decimals()` method, then a default precision of 18 will be
        // applied to the newly created synthetic token.
        uint8 collateralDecimals = _getSyntheticDecimals(params.collateralToken);
        ExpandedIERC20 longToken =
            tokenFactory.createToken(params.longSynthName, params.longSynthSymbol, collateralDecimals);
        ExpandedIERC20 shortToken =
            tokenFactory.createToken(params.shortSynthName, params.shortSynthSymbol, collateralDecimals);

        // Deploy the LPS contract.
        LongShortPair lsp = new LongShortPair(_convertParams(params, longToken, shortToken));

        // Move prepaid proposer reward from the deployer to the newly deployed contract.
        if (params.prepaidProposerReward > 0)
            params.collateralToken.safeTransferFrom(msg.sender, address(lsp), params.prepaidProposerReward);

        address lspAddress = address(lsp);

        // Give permissions to new lsp contract and then hand over ownership.
        longToken.addMinter(lspAddress);
        longToken.addBurner(lspAddress);
        longToken.resetOwner(lspAddress);

        shortToken.addMinter(lspAddress);
        shortToken.addBurner(lspAddress);
        shortToken.resetOwner(lspAddress);

        emit CreatedLongShortPair(lspAddress, msg.sender, address(longToken), address(shortToken));

        return lspAddress;
    }

    // Converts createLongShortPair creator params to LongShortPair constructor params.
    function _convertParams(
        CreatorParams memory creatorParams,
        ExpandedIERC20 longToken,
        ExpandedIERC20 shortToken
    ) private view returns (LongShortPair.ConstructorParams memory constructorParams) {
        // Input from function call.
        constructorParams.pairName = creatorParams.pairName;
        constructorParams.expirationTimestamp = creatorParams.expirationTimestamp;
        constructorParams.collateralPerPair = creatorParams.collateralPerPair;
        constructorParams.priceIdentifier = creatorParams.priceIdentifier;
        constructorParams.collateralToken = creatorParams.collateralToken;
        constructorParams.financialProductLibrary = creatorParams.financialProductLibrary;
        constructorParams.customAncillaryData = creatorParams.customAncillaryData;
        constructorParams.prepaidProposerReward = creatorParams.prepaidProposerReward;
        constructorParams.optimisticOracleLivenessTime = creatorParams.optimisticOracleLivenessTime;
        constructorParams.optimisticOracleProposerBond = creatorParams.optimisticOracleProposerBond;

        // Constructed long & short synthetic tokens.
        constructorParams.longToken = longToken;
        constructorParams.shortToken = shortToken;

        // Finder and timer. Should be the same as that used in this factory contract.
        constructorParams.finder = finder;
        constructorParams.timerAddress = timerAddress;
    }

    // IERC20Standard.decimals() will revert if the collateral contract has not implemented the decimals() method,
    // which is possible since the method is only an OPTIONAL method in the ERC20 standard:
    // https://eips.ethereum.org/EIPS/eip-20#methods.
    function _getSyntheticDecimals(IERC20Standard _collateralToken) private view returns (uint8 decimals) {
        try _collateralToken.decimals() returns (uint8 _decimals) {
            return _decimals;
        } catch {
            return 18;
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/**
 * @title ERC20 interface that includes burn and mint methods.
 */
abstract contract ExpandedIERC20 is IERC20 {
    /**
     * @notice Burns a specific amount of the caller's tokens.
     * @dev Only burns the caller's tokens, so it is safe to leave this method permissionless.
     */
    function burn(uint256 value) external virtual;

    /**
     * @dev Burns `value` tokens owned by `recipient`.
     * @param recipient address to burn tokens from.
     * @param value amount of tokens to burn.
     */
    function burnFrom(address recipient, uint256 value) external virtual returns (bool);

    /**
     * @notice Mints tokens and adds them to the balance of the `to` address.
     * @dev This method should be permissioned to only allow designated parties to mint tokens.
     */
    function mint(address to, uint256 value) external virtual returns (bool);

    function addMinter(address account) external virtual;

    function addBurner(address account) external virtual;

    function resetOwner(address account) external virtual;
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/**
 * @title ERC20 interface that includes the decimals read only method.
 */
interface IERC20Standard is IERC20 {
    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5,05`
     * (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value
     * {ERC20} uses, unless {_setupDecimals} is called.
     *
     * NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic
     * of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

/**
 * @title Provides addresses of the live contracts implementing certain interfaces.
 * @dev Examples are the Oracle or Store interfaces.
 */
interface FinderInterface {
    /**
     * @notice Updates the address of the contract that implements `interfaceName`.
     * @param interfaceName bytes32 encoding of the interface name that is either changed or registered.
     * @param implementationAddress address of the deployed contract that implements the interface.
     */
    function changeImplementationAddress(bytes32 interfaceName, address implementationAddress) external;

    /**
     * @notice Gets the address of the contract that implements the given `interfaceName`.
     * @param interfaceName queried interface.
     * @return implementationAddress address of the deployed contract that implements the interface.
     */
    function getImplementationAddress(bytes32 interfaceName) external view returns (address);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "./Timer.sol";

/**
 * @title Base class that provides time overrides, but only if being run in test mode.
 */
abstract contract Testable {
    // If the contract is being run in production, then `timerAddress` will be the 0x0 address.
    // Note: this variable should be set on construction and never modified.
    address public timerAddress;

    /**
     * @notice Constructs the Testable contract. Called by child contracts.
     * @param _timerAddress Contract that stores the current time in a testing environment.
     * Must be set to 0x0 for production environments that use live time.
     */
    constructor(address _timerAddress) {
        timerAddress = _timerAddress;
    }

    /**
     * @notice Reverts if not running in test mode.
     */
    modifier onlyIfTest {
        require(timerAddress != address(0x0));
        _;
    }

    /**
     * @notice Sets the current time.
     * @dev Will revert if not running in test mode.
     * @param time timestamp to set current Testable time to.
     */
    function setCurrentTime(uint256 time) external onlyIfTest {
        Timer(timerAddress).setCurrentTime(time);
    }

    /**
     * @notice Gets the current time. Will return the last time set in `setCurrentTime` if running in test mode.
     * Otherwise, it will return the block timestamp.
     * @return uint for the current Testable timestamp.
     */
    function getCurrentTime() public view returns (uint256) {
        if (timerAddress != address(0x0)) {
            return Timer(timerAddress).getCurrentTime();
        } else {
            return block.timestamp; // solhint-disable-line not-rely-on-time
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

/**
 * @title A contract that provides modifiers to prevent reentrancy to state-changing and view-only methods. This contract
 * is inspired by https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol
 * and https://github.com/balancer-labs/balancer-core/blob/master/contracts/BPool.sol.
 */
contract Lockable {
    bool private _notEntered;

    constructor() {
        // Storing an initial non-zero value makes deployment a bit more expensive, but in exchange the refund on every
        // call to nonReentrant will be lower in amount. Since refunds are capped to a percentage of the total
        // transaction's gas, it is best to keep them low in cases like this one, to increase the likelihood of the full
        // refund coming into effect.
        _notEntered = true;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant` function is not supported. It is possible to
     * prevent this from happening by making the `nonReentrant` function external, and making it call a `private`
     * function that does the actual state modification.
     */
    modifier nonReentrant() {
        _preEntranceCheck();
        _preEntranceSet();
        _;
        _postEntranceReset();
    }

    /**
     * @dev Designed to prevent a view-only method from being re-entered during a call to a `nonReentrant()` state-changing method.
     */
    modifier nonReentrantView() {
        _preEntranceCheck();
        _;
    }

    // Internal methods are used to avoid copying the require statement's bytecode to every `nonReentrant()` method.
    // On entry into a function, `_preEntranceCheck()` should always be called to check if the function is being
    // re-entered. Then, if the function modifies state, it should call `_postEntranceSet()`, perform its logic, and
    // then call `_postEntranceReset()`.
    // View-only methods can simply call `_preEntranceCheck()` to make sure that it is not being re-entered.
    function _preEntranceCheck() internal view {
        // On the first call to nonReentrant, _notEntered will be true
        require(_notEntered, "ReentrancyGuard: reentrant call");
    }

    function _preEntranceSet() internal {
        // Any calls to nonReentrant after this point will fail
        _notEntered = false;
    }

    function _postEntranceReset() internal {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _notEntered = true;
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "./SyntheticToken.sol";
import "../../common/interfaces/ExpandedIERC20.sol";
import "../../common/implementation/Lockable.sol";

/**
 * @title Factory for creating new mintable and burnable tokens.
 */

contract TokenFactory is Lockable {
    /**
     * @notice Create a new token and return it to the caller.
     * @dev The caller will become the only minter and burner and the new owner capable of assigning the roles.
     * @param tokenName used to describe the new token.
     * @param tokenSymbol short ticker abbreviation of the name. Ideally < 5 chars.
     * @param tokenDecimals used to define the precision used in the token's numerical representation.
     * @return newToken an instance of the newly created token interface.
     */
    function createToken(
        string calldata tokenName,
        string calldata tokenSymbol,
        uint8 tokenDecimals
    ) external nonReentrant() returns (ExpandedIERC20 newToken) {
        SyntheticToken mintableToken = new SyntheticToken(tokenName, tokenSymbol, tokenDecimals);
        mintableToken.resetOwner(msg.sender);
        newToken = ExpandedIERC20(address(mintableToken));
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/math/Math.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import "../common/financial-product-libraries/long-short-pair-libraries/LongShortPairFinancialProductLibrary.sol";

import "../../common/implementation/Testable.sol";
import "../../common/implementation/Lockable.sol";
import "../../common/implementation/FixedPoint.sol";

import "../../common/interfaces/ExpandedIERC20.sol";

import "../../oracle/interfaces/OracleInterface.sol";
import "../../common/interfaces/AddressWhitelistInterface.sol";
import "../../oracle/interfaces/FinderInterface.sol";
import "../../oracle/interfaces/OptimisticOracleInterface.sol";
import "../../oracle/interfaces/IdentifierWhitelistInterface.sol";

import "../../oracle/implementation/Constants.sol";

/**
 * @title Long Short Pair.
 * @notice Uses a combination of long and short tokens to tokenize the bounded price exposure to a given identifier.
 */

contract LongShortPair is Testable, Lockable {
    using FixedPoint for FixedPoint.Unsigned;
    using SafeERC20 for IERC20;

    /*********************************************
     *  LONG SHORT PAIR DATA STRUCTURES  *
     *********************************************/

    // Define the contract's constructor parameters as a struct to enable more variables to be specified.
    struct ConstructorParams {
        string pairName; // Name of the long short pair contract.
        uint64 expirationTimestamp; // Unix timestamp of when the contract will expire.
        uint256 collateralPerPair; // How many units of collateral are required to mint one pair of synthetic tokens.
        bytes32 priceIdentifier; // Price identifier, registered in the DVM for the long short pair.
        ExpandedIERC20 longToken; // Token used as long in the LSP. Mint and burn rights needed by this contract.
        ExpandedIERC20 shortToken; // Token used as short in the LSP. Mint and burn rights needed by this contract.
        IERC20 collateralToken; // Collateral token used to back LSP synthetics.
        LongShortPairFinancialProductLibrary financialProductLibrary; // Contract providing settlement payout logic.
        bytes customAncillaryData; // Custom ancillary data to be passed along with the price request to the OO.
        uint256 prepaidProposerReward; // Preloaded reward to incentivize settlement price proposals.
        uint256 optimisticOracleLivenessTime; // OO liveness time for price requests.
        uint256 optimisticOracleProposerBond; // OO proposer bond for price requests.
        FinderInterface finder; // DVM finder to find other UMA ecosystem contracts.
        address timerAddress; // Timer used to synchronize contract time in testing. Set to 0x000... in production.
    }

    enum ContractState { Open, ExpiredPriceRequested, ExpiredPriceReceived }
    // @dev note contractState and expirationTimestamp are declared in this order so they use the same storage slot.
    ContractState public contractState;

    uint64 public expirationTimestamp;

    string public pairName;

    // Amount of collateral a pair of tokens is always redeemable for.
    uint256 public collateralPerPair;

    // Price returned from the Optimistic oracle at settlement time.
    int256 public expiryPrice;

    // Number between 0 and 1e18 to allocate collateral between long & short tokens at redemption. 0 entitles each short
    // to collateralPerPair and long worth 0. 1e18 makes each long worth collateralPerPair and short 0.
    uint256 public expiryPercentLong;

    bytes32 public priceIdentifier;

    IERC20 public collateralToken;
    ExpandedIERC20 public longToken;
    ExpandedIERC20 public shortToken;

    FinderInterface public finder;

    LongShortPairFinancialProductLibrary public financialProductLibrary;

    // Optimistic oracle customization parameters.
    bytes public customAncillaryData;
    uint256 public prepaidProposerReward;
    uint256 public optimisticOracleLivenessTime;
    uint256 public optimisticOracleProposerBond;

    /****************************************
     *                EVENTS                *
     ****************************************/

    event TokensCreated(address indexed sponsor, uint256 indexed collateralUsed, uint256 indexed tokensMinted);
    event TokensRedeemed(address indexed sponsor, uint256 indexed collateralReturned, uint256 indexed tokensRedeemed);
    event ContractExpired(address indexed caller);
    event PositionSettled(address indexed sponsor, uint256 collateralReturned, uint256 longTokens, uint256 shortTokens);

    /****************************************
     *               MODIFIERS              *
     ****************************************/

    modifier preExpiration() {
        require(getCurrentTime() < expirationTimestamp, "Only callable pre-expiry");
        _;
    }

    modifier postExpiration() {
        require(getCurrentTime() >= expirationTimestamp, "Only callable post-expiry");
        _;
    }

    modifier onlyOpenState() {
        require(contractState == ContractState.Open, "Contract state is not Open");
        _;
    }

    /**
     * @notice Construct the LongShortPair
     * @param params Constructor params used to initialize the LSP. Key-valued object with the following structure:
     *    pairName: Name of the long short pair contract.
     *    expirationTimestamp: Unix timestamp of when the contract will expire.
     *    collateralPerPair: How many units of collateral are required to mint one pair of synthetic tokens.
     *    priceIdentifier: Price identifier, registered in the DVM for the long short pair.
     *    longToken: Token used as long in the LSP. Mint and burn rights needed by this contract.
     *    shortToken: Token used as short in the LSP. Mint and burn rights needed by this contract.
     *    collateralToken: Collateral token used to back LSP synthetics.
     *    financialProductLibrary: Contract providing settlement payout logic.
     *    customAncillaryData: Custom ancillary data to be passed along with the price request to the OO.
     *    prepaidProposerReward: Preloaded reward to incentivize settlement price proposals.
     *    optimisticOracleLivenessTime: OO liveness time for price requests.
     *    optimisticOracleProposerBond: OO proposer bond for price requests.
     *    finder: DVM finder to find other UMA ecosystem contracts.
     *    timerAddress: Timer used to synchronize contract time in testing. Set to 0x000... in production.
     */
    constructor(ConstructorParams memory params) Testable(params.timerAddress) {
        finder = params.finder;
        require(bytes(params.pairName).length > 0, "Pair name cant be empty");
        require(params.expirationTimestamp > getCurrentTime(), "Expiration timestamp in past");
        require(params.collateralPerPair > 0, "Collateral per pair cannot be 0");
        require(_getIdentifierWhitelist().isIdentifierSupported(params.priceIdentifier), "Identifier not registered");
        require(address(_getOptimisticOracle()) != address(0), "Invalid finder");
        require(address(params.financialProductLibrary) != address(0), "Invalid FinancialProductLibrary");
        require(_getCollateralWhitelist().isOnWhitelist(address(params.collateralToken)), "Collateral not whitelisted");
        require(params.optimisticOracleLivenessTime > 0, "OO liveness cannot be 0");
        require(params.optimisticOracleLivenessTime < 5200 weeks, "OO liveness too large");

        pairName = params.pairName;
        expirationTimestamp = params.expirationTimestamp;
        collateralPerPair = params.collateralPerPair;
        priceIdentifier = params.priceIdentifier;

        longToken = params.longToken;
        shortToken = params.shortToken;
        collateralToken = params.collateralToken;

        financialProductLibrary = params.financialProductLibrary;
        OptimisticOracleInterface optimisticOracle = _getOptimisticOracle();
        require(
            optimisticOracle.stampAncillaryData(params.customAncillaryData, address(this)).length <=
                optimisticOracle.ancillaryBytesLimit(),
            "Ancillary Data too long"
        );

        customAncillaryData = params.customAncillaryData;
        prepaidProposerReward = params.prepaidProposerReward;
        optimisticOracleLivenessTime = params.optimisticOracleLivenessTime;
        optimisticOracleProposerBond = params.optimisticOracleProposerBond;
    }

    /****************************************
     *          POSITION FUNCTIONS          *
     ****************************************/

    /**
     * @notice Creates a pair of long and short tokens equal in number to tokensToCreate. Pulls the required collateral
     * amount into this contract, defined by the collateralPerPair value.
     * @dev The caller must approve this contract to transfer `tokensToCreate * collateralPerPair` amount of collateral.
     * @param tokensToCreate number of long and short synthetic tokens to create.
     * @return collateralUsed total collateral used to mint the synthetics.
     */
    function create(uint256 tokensToCreate) public preExpiration() nonReentrant() returns (uint256 collateralUsed) {
        // Note the use of mulCeil to prevent small collateralPerPair causing rounding of collateralUsed to 0 enabling
        // callers to mint dust LSP tokens without paying any collateral.
        collateralUsed = FixedPoint.Unsigned(tokensToCreate).mulCeil(FixedPoint.Unsigned(collateralPerPair)).rawValue;

        collateralToken.safeTransferFrom(msg.sender, address(this), collateralUsed);

        require(longToken.mint(msg.sender, tokensToCreate));
        require(shortToken.mint(msg.sender, tokensToCreate));

        emit TokensCreated(msg.sender, collateralUsed, tokensToCreate);
    }

    /**
     * @notice Redeems a pair of long and short tokens equal in number to tokensToRedeem. Returns the commensurate
     * amount of collateral to the caller for the pair of tokens, defined by the collateralPerPair value.
     * @dev This contract must have the `Burner` role for the `longToken` and `shortToken` in order to call `burnFrom`.
     * @dev The caller does not need to approve this contract to transfer any amount of `tokensToRedeem` since long
     * and short tokens are burned, rather than transferred, from the caller.
     * @param tokensToRedeem number of long and short synthetic tokens to redeem.
     * @return collateralReturned total collateral returned in exchange for the pair of synthetics.
     */
    function redeem(uint256 tokensToRedeem) public nonReentrant() returns (uint256 collateralReturned) {
        require(longToken.burnFrom(msg.sender, tokensToRedeem));
        require(shortToken.burnFrom(msg.sender, tokensToRedeem));

        collateralReturned = FixedPoint.Unsigned(tokensToRedeem).mul(FixedPoint.Unsigned(collateralPerPair)).rawValue;

        collateralToken.safeTransfer(msg.sender, collateralReturned);

        emit TokensRedeemed(msg.sender, collateralReturned, tokensToRedeem);
    }

    /**
     * @notice Settle long and/or short tokens in for collateral at a rate informed by the contract settlement.
     * @dev Uses financialProductLibrary to compute the redemption rate between long and short tokens.
     * @dev This contract must have the `Burner` role for the `longToken` and `shortToken` in order to call `burnFrom`.
     * @dev The caller does not need to approve this contract to transfer any amount of `tokensToRedeem` since long
     * and short tokens are burned, rather than transferred, from the caller.
     * @param longTokensToRedeem number of long tokens to settle.
     * @param shortTokensToRedeem number of short tokens to settle.
     * @return collateralReturned total collateral returned in exchange for the pair of synthetics.
     */
    function settle(uint256 longTokensToRedeem, uint256 shortTokensToRedeem)
        public
        postExpiration()
        nonReentrant()
        returns (uint256 collateralReturned)
    {
        // If the contract state is open and postExpiration passed then `expire()` has not yet been called.
        require(contractState != ContractState.Open, "Unexpired contract");

        // Get the current settlement price and store it. If it is not resolved, will revert.
        if (contractState != ContractState.ExpiredPriceReceived) {
            expiryPrice = _getOraclePriceExpiration(expirationTimestamp);
            // Cap the return value at 1.
            expiryPercentLong = Math.min(
                financialProductLibrary.percentageLongCollateralAtExpiry(expiryPrice),
                FixedPoint.fromUnscaledUint(1).rawValue
            );
            contractState = ContractState.ExpiredPriceReceived;
        }

        require(longToken.burnFrom(msg.sender, longTokensToRedeem));
        require(shortToken.burnFrom(msg.sender, shortTokensToRedeem));

        // expiryPercentLong is a number between 0 and 1e18. 0 means all collateral goes to short tokens and 1e18 means
        // all collateral goes to the long token. Total collateral returned is the sum of payouts.
        uint256 longCollateralRedeemed =
            FixedPoint
                .Unsigned(longTokensToRedeem)
                .mul(FixedPoint.Unsigned(collateralPerPair))
                .mul(FixedPoint.Unsigned(expiryPercentLong))
                .rawValue;
        uint256 shortCollateralRedeemed =
            FixedPoint
                .Unsigned(shortTokensToRedeem)
                .mul(FixedPoint.Unsigned(collateralPerPair))
                .mul(FixedPoint.fromUnscaledUint(1).sub(FixedPoint.Unsigned(expiryPercentLong)))
                .rawValue;

        collateralReturned = longCollateralRedeemed + shortCollateralRedeemed;
        collateralToken.safeTransfer(msg.sender, collateralReturned);

        emit PositionSettled(msg.sender, collateralReturned, longTokensToRedeem, shortTokensToRedeem);
    }

    /****************************************
     *        GLOBAL STATE FUNCTIONS        *
     ****************************************/

    function expire() public postExpiration() onlyOpenState() nonReentrant() {
        _requestOraclePriceExpiration();
        contractState = ContractState.ExpiredPriceRequested;

        emit ContractExpired(msg.sender);
    }

    /****************************************
     *      GLOBAL ACCESSORS FUNCTIONS      *
     ****************************************/
    /**
     * @notice Returns the number of long and short tokens a sponsor wallet holds.
     * @param sponsor address of the sponsor to query.
     * @return [uint256, uint256]. First is long tokens held by sponsor and second is short tokens held by sponsor.
     */
    function getPositionTokens(address sponsor) public view nonReentrantView() returns (uint256, uint256) {
        return (longToken.balanceOf(sponsor), shortToken.balanceOf(sponsor));
    }

    /****************************************
     *          INTERNAL FUNCTIONS          *
     ****************************************/

    function _getOraclePriceExpiration(uint256 requestedTime) internal returns (int256) {
        // Create an instance of the oracle and get the price. If the price is not resolved revert.
        OptimisticOracleInterface optimisticOracle = _getOptimisticOracle();
        require(optimisticOracle.hasPrice(address(this), priceIdentifier, requestedTime, customAncillaryData));
        int256 oraclePrice = optimisticOracle.settleAndGetPrice(priceIdentifier, requestedTime, customAncillaryData);

        return oraclePrice;
    }

    function _requestOraclePriceExpiration() internal {
        OptimisticOracleInterface optimisticOracle = _getOptimisticOracle();

        // Use the prepaidProposerReward as the proposer reward.
        if (prepaidProposerReward > 0) collateralToken.safeApprove(address(optimisticOracle), prepaidProposerReward);
        optimisticOracle.requestPrice(
            priceIdentifier,
            expirationTimestamp,
            customAncillaryData,
            collateralToken,
            prepaidProposerReward
        );

        // Set the Optimistic oracle liveness for the price request.
        optimisticOracle.setCustomLiveness(
            priceIdentifier,
            expirationTimestamp,
            customAncillaryData,
            optimisticOracleLivenessTime
        );

        // Set the Optimistic oracle proposer bond for the price request.
        optimisticOracle.setBond(
            priceIdentifier,
            expirationTimestamp,
            customAncillaryData,
            optimisticOracleProposerBond
        );
    }

    function _getIdentifierWhitelist() internal view returns (IdentifierWhitelistInterface) {
        return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
    }

    function _getCollateralWhitelist() internal view returns (AddressWhitelistInterface) {
        return AddressWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.CollateralWhitelist));
    }

    function _getOptimisticOracle() internal view returns (OptimisticOracleInterface) {
        return OptimisticOracleInterface(finder.getImplementationAddress(OracleInterfaces.OptimisticOracle));
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../../../../common/implementation/FixedPoint.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

interface ExpiringContractInterface {
    function expirationTimestamp() external view returns (uint256);
}

abstract contract LongShortPairFinancialProductLibrary {
    function percentageLongCollateralAtExpiry(int256 expiryPrice) public view virtual returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

/**
 * @title Universal store of current contract time for testing environments.
 */
contract Timer {
    uint256 private currentTime;

    constructor() {
        currentTime = block.timestamp; // solhint-disable-line not-rely-on-time
    }

    /**
     * @notice Sets the current time.
     * @dev Will revert if not running in test mode.
     * @param time timestamp to set `currentTime` to.
     */
    function setCurrentTime(uint256 time) external {
        currentTime = time;
    }

    /**
     * @notice Gets the currentTime variable set in the Timer.
     * @return uint256 for the current Testable timestamp.
     */
    function getCurrentTime() public view returns (uint256) {
        return currentTime;
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../../common/implementation/ExpandedERC20.sol";
import "../../common/implementation/Lockable.sol";

/**
 * @title Burnable and mintable ERC20.
 * @dev The contract deployer will initially be the only minter, burner and owner capable of adding new roles.
 */

contract SyntheticToken is ExpandedERC20, Lockable {
    /**
     * @notice Constructs the SyntheticToken.
     * @param tokenName The name which describes the new token.
     * @param tokenSymbol The ticker abbreviation of the name. Ideally < 5 chars.
     * @param tokenDecimals The number of decimals to define token precision.
     */
    constructor(
        string memory tokenName,
        string memory tokenSymbol,
        uint8 tokenDecimals
    ) ExpandedERC20(tokenName, tokenSymbol, tokenDecimals) nonReentrant() {}

    /**
     * @notice Add Minter role to account.
     * @dev The caller must have the Owner role.
     * @param account The address to which the Minter role is added.
     */
    function addMinter(address account) external override nonReentrant() {
        addMember(uint256(Roles.Minter), account);
    }

    /**
     * @notice Remove Minter role from account.
     * @dev The caller must have the Owner role.
     * @param account The address from which the Minter role is removed.
     */
    function removeMinter(address account) external nonReentrant() {
        removeMember(uint256(Roles.Minter), account);
    }

    /**
     * @notice Add Burner role to account.
     * @dev The caller must have the Owner role.
     * @param account The address to which the Burner role is added.
     */
    function addBurner(address account) external override nonReentrant() {
        addMember(uint256(Roles.Burner), account);
    }

    /**
     * @notice Removes Burner role from account.
     * @dev The caller must have the Owner role.
     * @param account The address from which the Burner role is removed.
     */
    function removeBurner(address account) external nonReentrant() {
        removeMember(uint256(Roles.Burner), account);
    }

    /**
     * @notice Reset Owner role to account.
     * @dev The caller must have the Owner role.
     * @param account The new holder of the Owner role.
     */
    function resetOwner(address account) external override nonReentrant() {
        resetMember(uint256(Roles.Owner), account);
    }

    /**
     * @notice Checks if a given account holds the Minter role.
     * @param account The address which is checked for the Minter role.
     * @return bool True if the provided account is a Minter.
     */
    function isMinter(address account) public view nonReentrantView() returns (bool) {
        return holdsRole(uint256(Roles.Minter), account);
    }

    /**
     * @notice Checks if a given account holds the Burner role.
     * @param account The address which is checked for the Burner role.
     * @return bool True if the provided account is a Burner.
     */
    function isBurner(address account) public view nonReentrantView() returns (bool) {
        return holdsRole(uint256(Roles.Burner), account);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./MultiRole.sol";
import "../interfaces/ExpandedIERC20.sol";

/**
 * @title An ERC20 with permissioned burning and minting. The contract deployer will initially
 * be the owner who is capable of adding new roles.
 */
contract ExpandedERC20 is ExpandedIERC20, ERC20, MultiRole {
    enum Roles {
        // Can set the minter and burner.
        Owner,
        // Addresses that can mint new tokens.
        Minter,
        // Addresses that can burn tokens that address owns.
        Burner
    }

    uint8 _decimals;

    /**
     * @notice Constructs the ExpandedERC20.
     * @param _tokenName The name which describes the new token.
     * @param _tokenSymbol The ticker abbreviation of the name. Ideally < 5 chars.
     * @param _tokenDecimals The number of decimals to define token precision.
     */
    constructor(
        string memory _tokenName,
        string memory _tokenSymbol,
        uint8 _tokenDecimals
    ) ERC20(_tokenName, _tokenSymbol) {
        _decimals = _tokenDecimals;
        _createExclusiveRole(uint256(Roles.Owner), uint256(Roles.Owner), msg.sender);
        _createSharedRole(uint256(Roles.Minter), uint256(Roles.Owner), new address[](0));
        _createSharedRole(uint256(Roles.Burner), uint256(Roles.Owner), new address[](0));
    }

    function decimals() public view virtual override(ERC20) returns (uint8) {
        return _decimals;
    }

    /**
     * @dev Mints `value` tokens to `recipient`, returning true on success.
     * @param recipient address to mint to.
     * @param value amount of tokens to mint.
     * @return True if the mint succeeded, or False.
     */
    function mint(address recipient, uint256 value)
        external
        override
        onlyRoleHolder(uint256(Roles.Minter))
        returns (bool)
    {
        _mint(recipient, value);
        return true;
    }

    /**
     * @dev Burns `value` tokens owned by `msg.sender`.
     * @param value amount of tokens to burn.
     */
    function burn(uint256 value) external override onlyRoleHolder(uint256(Roles.Burner)) {
        _burn(msg.sender, value);
    }

    /**
     * @dev Burns `value` tokens owned by `recipient`.
     * @param recipient address to burn tokens from.
     * @param value amount of tokens to burn.
     * @return True if the burn succeeded, or False.
     */
    function burnFrom(address recipient, uint256 value)
        external
        override
        onlyRoleHolder(uint256(Roles.Burner))
        returns (bool)
    {
        _burn(recipient, value);
        return true;
    }

    /**
     * @notice Add Minter role to account.
     * @dev The caller must have the Owner role.
     * @param account The address to which the Minter role is added.
     */
    function addMinter(address account) external virtual override {
        addMember(uint256(Roles.Minter), account);
    }

    /**
     * @notice Add Burner role to account.
     * @dev The caller must have the Owner role.
     * @param account The address to which the Burner role is added.
     */
    function addBurner(address account) external virtual override {
        addMember(uint256(Roles.Burner), account);
    }

    /**
     * @notice Reset Owner role to account.
     * @dev The caller must have the Owner role.
     * @param account The new holder of the Owner role.
     */
    function resetOwner(address account) external virtual override {
        resetMember(uint256(Roles.Owner), account);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The defaut value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        _approve(sender, _msgSender(), currentAllowance - amount);

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);

        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        _balances[sender] = senderBalance - amount;
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        _balances[account] = accountBalance - amount;
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

library Exclusive {
    struct RoleMembership {
        address member;
    }

    function isMember(RoleMembership storage roleMembership, address memberToCheck) internal view returns (bool) {
        return roleMembership.member == memberToCheck;
    }

    function resetMember(RoleMembership storage roleMembership, address newMember) internal {
        require(newMember != address(0x0), "Cannot set an exclusive role to 0x0");
        roleMembership.member = newMember;
    }

    function getMember(RoleMembership storage roleMembership) internal view returns (address) {
        return roleMembership.member;
    }

    function init(RoleMembership storage roleMembership, address initialMember) internal {
        resetMember(roleMembership, initialMember);
    }
}

library Shared {
    struct RoleMembership {
        mapping(address => bool) members;
    }

    function isMember(RoleMembership storage roleMembership, address memberToCheck) internal view returns (bool) {
        return roleMembership.members[memberToCheck];
    }

    function addMember(RoleMembership storage roleMembership, address memberToAdd) internal {
        require(memberToAdd != address(0x0), "Cannot add 0x0 to a shared role");
        roleMembership.members[memberToAdd] = true;
    }

    function removeMember(RoleMembership storage roleMembership, address memberToRemove) internal {
        roleMembership.members[memberToRemove] = false;
    }

    function init(RoleMembership storage roleMembership, address[] memory initialMembers) internal {
        for (uint256 i = 0; i < initialMembers.length; i++) {
            addMember(roleMembership, initialMembers[i]);
        }
    }
}

/**
 * @title Base class to manage permissions for the derived class.
 */
abstract contract MultiRole {
    using Exclusive for Exclusive.RoleMembership;
    using Shared for Shared.RoleMembership;

    enum RoleType { Invalid, Exclusive, Shared }

    struct Role {
        uint256 managingRole;
        RoleType roleType;
        Exclusive.RoleMembership exclusiveRoleMembership;
        Shared.RoleMembership sharedRoleMembership;
    }

    mapping(uint256 => Role) private roles;

    event ResetExclusiveMember(uint256 indexed roleId, address indexed newMember, address indexed manager);
    event AddedSharedMember(uint256 indexed roleId, address indexed newMember, address indexed manager);
    event RemovedSharedMember(uint256 indexed roleId, address indexed oldMember, address indexed manager);

    /**
     * @notice Reverts unless the caller is a member of the specified roleId.
     */
    modifier onlyRoleHolder(uint256 roleId) {
        require(holdsRole(roleId, msg.sender), "Sender does not hold required role");
        _;
    }

    /**
     * @notice Reverts unless the caller is a member of the manager role for the specified roleId.
     */
    modifier onlyRoleManager(uint256 roleId) {
        require(holdsRole(roles[roleId].managingRole, msg.sender), "Can only be called by a role manager");
        _;
    }

    /**
     * @notice Reverts unless the roleId represents an initialized, exclusive roleId.
     */
    modifier onlyExclusive(uint256 roleId) {
        require(roles[roleId].roleType == RoleType.Exclusive, "Must be called on an initialized Exclusive role");
        _;
    }

    /**
     * @notice Reverts unless the roleId represents an initialized, shared roleId.
     */
    modifier onlyShared(uint256 roleId) {
        require(roles[roleId].roleType == RoleType.Shared, "Must be called on an initialized Shared role");
        _;
    }

    /**
     * @notice Whether `memberToCheck` is a member of roleId.
     * @dev Reverts if roleId does not correspond to an initialized role.
     * @param roleId the Role to check.
     * @param memberToCheck the address to check.
     * @return True if `memberToCheck` is a member of `roleId`.
     */
    function holdsRole(uint256 roleId, address memberToCheck) public view returns (bool) {
        Role storage role = roles[roleId];
        if (role.roleType == RoleType.Exclusive) {
            return role.exclusiveRoleMembership.isMember(memberToCheck);
        } else if (role.roleType == RoleType.Shared) {
            return role.sharedRoleMembership.isMember(memberToCheck);
        }
        revert("Invalid roleId");
    }

    /**
     * @notice Changes the exclusive role holder of `roleId` to `newMember`.
     * @dev Reverts if the caller is not a member of the managing role for `roleId` or if `roleId` is not an
     * initialized, ExclusiveRole.
     * @param roleId the ExclusiveRole membership to modify.
     * @param newMember the new ExclusiveRole member.
     */
    function resetMember(uint256 roleId, address newMember) public onlyExclusive(roleId) onlyRoleManager(roleId) {
        roles[roleId].exclusiveRoleMembership.resetMember(newMember);
        emit ResetExclusiveMember(roleId, newMember, msg.sender);
    }

    /**
     * @notice Gets the current holder of the exclusive role, `roleId`.
     * @dev Reverts if `roleId` does not represent an initialized, exclusive role.
     * @param roleId the ExclusiveRole membership to check.
     * @return the address of the current ExclusiveRole member.
     */
    function getMember(uint256 roleId) public view onlyExclusive(roleId) returns (address) {
        return roles[roleId].exclusiveRoleMembership.getMember();
    }

    /**
     * @notice Adds `newMember` to the shared role, `roleId`.
     * @dev Reverts if `roleId` does not represent an initialized, SharedRole or if the caller is not a member of the
     * managing role for `roleId`.
     * @param roleId the SharedRole membership to modify.
     * @param newMember the new SharedRole member.
     */
    function addMember(uint256 roleId, address newMember) public onlyShared(roleId) onlyRoleManager(roleId) {
        roles[roleId].sharedRoleMembership.addMember(newMember);
        emit AddedSharedMember(roleId, newMember, msg.sender);
    }

    /**
     * @notice Removes `memberToRemove` from the shared role, `roleId`.
     * @dev Reverts if `roleId` does not represent an initialized, SharedRole or if the caller is not a member of the
     * managing role for `roleId`.
     * @param roleId the SharedRole membership to modify.
     * @param memberToRemove the current SharedRole member to remove.
     */
    function removeMember(uint256 roleId, address memberToRemove) public onlyShared(roleId) onlyRoleManager(roleId) {
        roles[roleId].sharedRoleMembership.removeMember(memberToRemove);
        emit RemovedSharedMember(roleId, memberToRemove, msg.sender);
    }

    /**
     * @notice Removes caller from the role, `roleId`.
     * @dev Reverts if the caller is not a member of the role for `roleId` or if `roleId` is not an
     * initialized, SharedRole.
     * @param roleId the SharedRole membership to modify.
     */
    function renounceMembership(uint256 roleId) public onlyShared(roleId) onlyRoleHolder(roleId) {
        roles[roleId].sharedRoleMembership.removeMember(msg.sender);
        emit RemovedSharedMember(roleId, msg.sender, msg.sender);
    }

    /**
     * @notice Reverts if `roleId` is not initialized.
     */
    modifier onlyValidRole(uint256 roleId) {
        require(roles[roleId].roleType != RoleType.Invalid, "Attempted to use an invalid roleId");
        _;
    }

    /**
     * @notice Reverts if `roleId` is initialized.
     */
    modifier onlyInvalidRole(uint256 roleId) {
        require(roles[roleId].roleType == RoleType.Invalid, "Cannot use a pre-existing role");
        _;
    }

    /**
     * @notice Internal method to initialize a shared role, `roleId`, which will be managed by `managingRoleId`.
     * `initialMembers` will be immediately added to the role.
     * @dev Should be called by derived contracts, usually at construction time. Will revert if the role is already
     * initialized.
     */
    function _createSharedRole(
        uint256 roleId,
        uint256 managingRoleId,
        address[] memory initialMembers
    ) internal onlyInvalidRole(roleId) {
        Role storage role = roles[roleId];
        role.roleType = RoleType.Shared;
        role.managingRole = managingRoleId;
        role.sharedRoleMembership.init(initialMembers);
        require(
            roles[managingRoleId].roleType != RoleType.Invalid,
            "Attempted to use an invalid role to manage a shared role"
        );
    }

    /**
     * @notice Internal method to initialize an exclusive role, `roleId`, which will be managed by `managingRoleId`.
     * `initialMember` will be immediately added to the role.
     * @dev Should be called by derived contracts, usually at construction time. Will revert if the role is already
     * initialized.
     */
    function _createExclusiveRole(
        uint256 roleId,
        uint256 managingRoleId,
        address initialMember
    ) internal onlyInvalidRole(roleId) {
        Role storage role = roles[roleId];
        role.roleType = RoleType.Exclusive;
        role.managingRole = managingRoleId;
        role.exclusiveRoleMembership.init(initialMember);
        require(
            roles[managingRoleId].roleType != RoleType.Invalid,
            "Attempted to use an invalid role to manage an exclusive role"
        );
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/math/SignedSafeMath.sol";

/**
 * @title Library for fixed point arithmetic on uints
 */
library FixedPoint {
    using SafeMath for uint256;
    using SignedSafeMath for int256;

    // Supports 18 decimals. E.g., 1e18 represents "1", 5e17 represents "0.5".
    // For unsigned values:
    //   This can represent a value up to (2^256 - 1)/10^18 = ~10^59. 10^59 will be stored internally as uint256 10^77.
    uint256 private constant FP_SCALING_FACTOR = 10**18;

    // --------------------------------------- UNSIGNED -----------------------------------------------------------------------------
    struct Unsigned {
        uint256 rawValue;
    }

    /**
     * @notice Constructs an `Unsigned` from an unscaled uint, e.g., `b=5` gets stored internally as `5*(10**18)`.
     * @param a uint to convert into a FixedPoint.
     * @return the converted FixedPoint.
     */
    function fromUnscaledUint(uint256 a) internal pure returns (Unsigned memory) {
        return Unsigned(a.mul(FP_SCALING_FACTOR));
    }

    /**
     * @notice Whether `a` is equal to `b`.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return True if equal, or False.
     */
    function isEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
        return a.rawValue == fromUnscaledUint(b).rawValue;
    }

    /**
     * @notice Whether `a` is equal to `b`.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return True if equal, or False.
     */
    function isEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
        return a.rawValue == b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than `b`.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return True if `a > b`, or False.
     */
    function isGreaterThan(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
        return a.rawValue > b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than `b`.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return True if `a > b`, or False.
     */
    function isGreaterThan(Unsigned memory a, uint256 b) internal pure returns (bool) {
        return a.rawValue > fromUnscaledUint(b).rawValue;
    }

    /**
     * @notice Whether `a` is greater than `b`.
     * @param a a uint256.
     * @param b a FixedPoint.
     * @return True if `a > b`, or False.
     */
    function isGreaterThan(uint256 a, Unsigned memory b) internal pure returns (bool) {
        return fromUnscaledUint(a).rawValue > b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than or equal to `b`.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return True if `a >= b`, or False.
     */
    function isGreaterThanOrEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
        return a.rawValue >= b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than or equal to `b`.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return True if `a >= b`, or False.
     */
    function isGreaterThanOrEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
        return a.rawValue >= fromUnscaledUint(b).rawValue;
    }

    /**
     * @notice Whether `a` is greater than or equal to `b`.
     * @param a a uint256.
     * @param b a FixedPoint.
     * @return True if `a >= b`, or False.
     */
    function isGreaterThanOrEqual(uint256 a, Unsigned memory b) internal pure returns (bool) {
        return fromUnscaledUint(a).rawValue >= b.rawValue;
    }

    /**
     * @notice Whether `a` is less than `b`.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return True if `a < b`, or False.
     */
    function isLessThan(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
        return a.rawValue < b.rawValue;
    }

    /**
     * @notice Whether `a` is less than `b`.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return True if `a < b`, or False.
     */
    function isLessThan(Unsigned memory a, uint256 b) internal pure returns (bool) {
        return a.rawValue < fromUnscaledUint(b).rawValue;
    }

    /**
     * @notice Whether `a` is less than `b`.
     * @param a a uint256.
     * @param b a FixedPoint.
     * @return True if `a < b`, or False.
     */
    function isLessThan(uint256 a, Unsigned memory b) internal pure returns (bool) {
        return fromUnscaledUint(a).rawValue < b.rawValue;
    }

    /**
     * @notice Whether `a` is less than or equal to `b`.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return True if `a <= b`, or False.
     */
    function isLessThanOrEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
        return a.rawValue <= b.rawValue;
    }

    /**
     * @notice Whether `a` is less than or equal to `b`.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return True if `a <= b`, or False.
     */
    function isLessThanOrEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
        return a.rawValue <= fromUnscaledUint(b).rawValue;
    }

    /**
     * @notice Whether `a` is less than or equal to `b`.
     * @param a a uint256.
     * @param b a FixedPoint.
     * @return True if `a <= b`, or False.
     */
    function isLessThanOrEqual(uint256 a, Unsigned memory b) internal pure returns (bool) {
        return fromUnscaledUint(a).rawValue <= b.rawValue;
    }

    /**
     * @notice The minimum of `a` and `b`.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return the minimum of `a` and `b`.
     */
    function min(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        return a.rawValue < b.rawValue ? a : b;
    }

    /**
     * @notice The maximum of `a` and `b`.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return the maximum of `a` and `b`.
     */
    function max(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        return a.rawValue > b.rawValue ? a : b;
    }

    /**
     * @notice Adds two `Unsigned`s, reverting on overflow.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return the sum of `a` and `b`.
     */
    function add(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        return Unsigned(a.rawValue.add(b.rawValue));
    }

    /**
     * @notice Adds an `Unsigned` to an unscaled uint, reverting on overflow.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return the sum of `a` and `b`.
     */
    function add(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
        return add(a, fromUnscaledUint(b));
    }

    /**
     * @notice Subtracts two `Unsigned`s, reverting on overflow.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return the difference of `a` and `b`.
     */
    function sub(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        return Unsigned(a.rawValue.sub(b.rawValue));
    }

    /**
     * @notice Subtracts an unscaled uint256 from an `Unsigned`, reverting on overflow.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return the difference of `a` and `b`.
     */
    function sub(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
        return sub(a, fromUnscaledUint(b));
    }

    /**
     * @notice Subtracts an `Unsigned` from an unscaled uint256, reverting on overflow.
     * @param a a uint256.
     * @param b a FixedPoint.
     * @return the difference of `a` and `b`.
     */
    function sub(uint256 a, Unsigned memory b) internal pure returns (Unsigned memory) {
        return sub(fromUnscaledUint(a), b);
    }

    /**
     * @notice Multiplies two `Unsigned`s, reverting on overflow.
     * @dev This will "floor" the product.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return the product of `a` and `b`.
     */
    function mul(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        // There are two caveats with this computation:
        // 1. Max output for the represented number is ~10^41, otherwise an intermediate value overflows. 10^41 is
        // stored internally as a uint256 ~10^59.
        // 2. Results that can't be represented exactly are truncated not rounded. E.g., 1.4 * 2e-18 = 2.8e-18, which
        // would round to 3, but this computation produces the result 2.
        // No need to use SafeMath because FP_SCALING_FACTOR != 0.
        return Unsigned(a.rawValue.mul(b.rawValue) / FP_SCALING_FACTOR);
    }

    /**
     * @notice Multiplies an `Unsigned` and an unscaled uint256, reverting on overflow.
     * @dev This will "floor" the product.
     * @param a a FixedPoint.
     * @param b a uint256.
     * @return the product of `a` and `b`.
     */
    function mul(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
        return Unsigned(a.rawValue.mul(b));
    }

    /**
     * @notice Multiplies two `Unsigned`s and "ceil's" the product, reverting on overflow.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return the product of `a` and `b`.
     */
    function mulCeil(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        uint256 mulRaw = a.rawValue.mul(b.rawValue);
        uint256 mulFloor = mulRaw / FP_SCALING_FACTOR;
        uint256 mod = mulRaw.mod(FP_SCALING_FACTOR);
        if (mod != 0) {
            return Unsigned(mulFloor.add(1));
        } else {
            return Unsigned(mulFloor);
        }
    }

    /**
     * @notice Multiplies an `Unsigned` and an unscaled uint256 and "ceil's" the product, reverting on overflow.
     * @param a a FixedPoint.
     * @param b a FixedPoint.
     * @return the product of `a` and `b`.
     */
    function mulCeil(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
        // Since b is an int, there is no risk of truncation and we can just mul it normally
        return Unsigned(a.rawValue.mul(b));
    }

    /**
     * @notice Divides one `Unsigned` by an `Unsigned`, reverting on overflow or division by 0.
     * @dev This will "floor" the quotient.
     * @param a a FixedPoint numerator.
     * @param b a FixedPoint denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function div(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        // There are two caveats with this computation:
        // 1. Max value for the number dividend `a` represents is ~10^41, otherwise an intermediate value overflows.
        // 10^41 is stored internally as a uint256 10^59.
        // 2. Results that can't be represented exactly are truncated not rounded. E.g., 2 / 3 = 0.6 repeating, which
        // would round to 0.666666666666666667, but this computation produces the result 0.666666666666666666.
        return Unsigned(a.rawValue.mul(FP_SCALING_FACTOR).div(b.rawValue));
    }

    /**
     * @notice Divides one `Unsigned` by an unscaled uint256, reverting on overflow or division by 0.
     * @dev This will "floor" the quotient.
     * @param a a FixedPoint numerator.
     * @param b a uint256 denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function div(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
        return Unsigned(a.rawValue.div(b));
    }

    /**
     * @notice Divides one unscaled uint256 by an `Unsigned`, reverting on overflow or division by 0.
     * @dev This will "floor" the quotient.
     * @param a a uint256 numerator.
     * @param b a FixedPoint denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function div(uint256 a, Unsigned memory b) internal pure returns (Unsigned memory) {
        return div(fromUnscaledUint(a), b);
    }

    /**
     * @notice Divides one `Unsigned` by an `Unsigned` and "ceil's" the quotient, reverting on overflow or division by 0.
     * @param a a FixedPoint numerator.
     * @param b a FixedPoint denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function divCeil(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
        uint256 aScaled = a.rawValue.mul(FP_SCALING_FACTOR);
        uint256 divFloor = aScaled.div(b.rawValue);
        uint256 mod = aScaled.mod(b.rawValue);
        if (mod != 0) {
            return Unsigned(divFloor.add(1));
        } else {
            return Unsigned(divFloor);
        }
    }

    /**
     * @notice Divides one `Unsigned` by an unscaled uint256 and "ceil's" the quotient, reverting on overflow or division by 0.
     * @param a a FixedPoint numerator.
     * @param b a uint256 denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function divCeil(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
        // Because it is possible that a quotient gets truncated, we can't just call "Unsigned(a.rawValue.div(b))"
        // similarly to mulCeil with a uint256 as the second parameter. Therefore we need to convert b into an Unsigned.
        // This creates the possibility of overflow if b is very large.
        return divCeil(a, fromUnscaledUint(b));
    }

    /**
     * @notice Raises an `Unsigned` to the power of an unscaled uint256, reverting on overflow. E.g., `b=2` squares `a`.
     * @dev This will "floor" the result.
     * @param a a FixedPoint numerator.
     * @param b a uint256 denominator.
     * @return output is `a` to the power of `b`.
     */
    function pow(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory output) {
        output = fromUnscaledUint(1);
        for (uint256 i = 0; i < b; i = i.add(1)) {
            output = mul(output, a);
        }
    }

    // ------------------------------------------------- SIGNED -------------------------------------------------------------
    // Supports 18 decimals. E.g., 1e18 represents "1", 5e17 represents "0.5".
    // For signed values:
    //   This can represent a value up (or down) to +-(2^255 - 1)/10^18 = ~10^58. 10^58 will be stored internally as int256 10^76.
    int256 private constant SFP_SCALING_FACTOR = 10**18;

    struct Signed {
        int256 rawValue;
    }

    function fromSigned(Signed memory a) internal pure returns (Unsigned memory) {
        require(a.rawValue >= 0, "Negative value provided");
        return Unsigned(uint256(a.rawValue));
    }

    function fromUnsigned(Unsigned memory a) internal pure returns (Signed memory) {
        require(a.rawValue <= uint256(type(int256).max), "Unsigned too large");
        return Signed(int256(a.rawValue));
    }

    /**
     * @notice Constructs a `Signed` from an unscaled int, e.g., `b=5` gets stored internally as `5*(10**18)`.
     * @param a int to convert into a FixedPoint.Signed.
     * @return the converted FixedPoint.Signed.
     */
    function fromUnscaledInt(int256 a) internal pure returns (Signed memory) {
        return Signed(a.mul(SFP_SCALING_FACTOR));
    }

    /**
     * @notice Whether `a` is equal to `b`.
     * @param a a FixedPoint.Signed.
     * @param b a int256.
     * @return True if equal, or False.
     */
    function isEqual(Signed memory a, int256 b) internal pure returns (bool) {
        return a.rawValue == fromUnscaledInt(b).rawValue;
    }

    /**
     * @notice Whether `a` is equal to `b`.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return True if equal, or False.
     */
    function isEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
        return a.rawValue == b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than `b`.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return True if `a > b`, or False.
     */
    function isGreaterThan(Signed memory a, Signed memory b) internal pure returns (bool) {
        return a.rawValue > b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than `b`.
     * @param a a FixedPoint.Signed.
     * @param b an int256.
     * @return True if `a > b`, or False.
     */
    function isGreaterThan(Signed memory a, int256 b) internal pure returns (bool) {
        return a.rawValue > fromUnscaledInt(b).rawValue;
    }

    /**
     * @notice Whether `a` is greater than `b`.
     * @param a an int256.
     * @param b a FixedPoint.Signed.
     * @return True if `a > b`, or False.
     */
    function isGreaterThan(int256 a, Signed memory b) internal pure returns (bool) {
        return fromUnscaledInt(a).rawValue > b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than or equal to `b`.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return True if `a >= b`, or False.
     */
    function isGreaterThanOrEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
        return a.rawValue >= b.rawValue;
    }

    /**
     * @notice Whether `a` is greater than or equal to `b`.
     * @param a a FixedPoint.Signed.
     * @param b an int256.
     * @return True if `a >= b`, or False.
     */
    function isGreaterThanOrEqual(Signed memory a, int256 b) internal pure returns (bool) {
        return a.rawValue >= fromUnscaledInt(b).rawValue;
    }

    /**
     * @notice Whether `a` is greater than or equal to `b`.
     * @param a an int256.
     * @param b a FixedPoint.Signed.
     * @return True if `a >= b`, or False.
     */
    function isGreaterThanOrEqual(int256 a, Signed memory b) internal pure returns (bool) {
        return fromUnscaledInt(a).rawValue >= b.rawValue;
    }

    /**
     * @notice Whether `a` is less than `b`.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return True if `a < b`, or False.
     */
    function isLessThan(Signed memory a, Signed memory b) internal pure returns (bool) {
        return a.rawValue < b.rawValue;
    }

    /**
     * @notice Whether `a` is less than `b`.
     * @param a a FixedPoint.Signed.
     * @param b an int256.
     * @return True if `a < b`, or False.
     */
    function isLessThan(Signed memory a, int256 b) internal pure returns (bool) {
        return a.rawValue < fromUnscaledInt(b).rawValue;
    }

    /**
     * @notice Whether `a` is less than `b`.
     * @param a an int256.
     * @param b a FixedPoint.Signed.
     * @return True if `a < b`, or False.
     */
    function isLessThan(int256 a, Signed memory b) internal pure returns (bool) {
        return fromUnscaledInt(a).rawValue < b.rawValue;
    }

    /**
     * @notice Whether `a` is less than or equal to `b`.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return True if `a <= b`, or False.
     */
    function isLessThanOrEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
        return a.rawValue <= b.rawValue;
    }

    /**
     * @notice Whether `a` is less than or equal to `b`.
     * @param a a FixedPoint.Signed.
     * @param b an int256.
     * @return True if `a <= b`, or False.
     */
    function isLessThanOrEqual(Signed memory a, int256 b) internal pure returns (bool) {
        return a.rawValue <= fromUnscaledInt(b).rawValue;
    }

    /**
     * @notice Whether `a` is less than or equal to `b`.
     * @param a an int256.
     * @param b a FixedPoint.Signed.
     * @return True if `a <= b`, or False.
     */
    function isLessThanOrEqual(int256 a, Signed memory b) internal pure returns (bool) {
        return fromUnscaledInt(a).rawValue <= b.rawValue;
    }

    /**
     * @notice The minimum of `a` and `b`.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return the minimum of `a` and `b`.
     */
    function min(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        return a.rawValue < b.rawValue ? a : b;
    }

    /**
     * @notice The maximum of `a` and `b`.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return the maximum of `a` and `b`.
     */
    function max(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        return a.rawValue > b.rawValue ? a : b;
    }

    /**
     * @notice Adds two `Signed`s, reverting on overflow.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return the sum of `a` and `b`.
     */
    function add(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        return Signed(a.rawValue.add(b.rawValue));
    }

    /**
     * @notice Adds an `Signed` to an unscaled int, reverting on overflow.
     * @param a a FixedPoint.Signed.
     * @param b an int256.
     * @return the sum of `a` and `b`.
     */
    function add(Signed memory a, int256 b) internal pure returns (Signed memory) {
        return add(a, fromUnscaledInt(b));
    }

    /**
     * @notice Subtracts two `Signed`s, reverting on overflow.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return the difference of `a` and `b`.
     */
    function sub(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        return Signed(a.rawValue.sub(b.rawValue));
    }

    /**
     * @notice Subtracts an unscaled int256 from an `Signed`, reverting on overflow.
     * @param a a FixedPoint.Signed.
     * @param b an int256.
     * @return the difference of `a` and `b`.
     */
    function sub(Signed memory a, int256 b) internal pure returns (Signed memory) {
        return sub(a, fromUnscaledInt(b));
    }

    /**
     * @notice Subtracts an `Signed` from an unscaled int256, reverting on overflow.
     * @param a an int256.
     * @param b a FixedPoint.Signed.
     * @return the difference of `a` and `b`.
     */
    function sub(int256 a, Signed memory b) internal pure returns (Signed memory) {
        return sub(fromUnscaledInt(a), b);
    }

    /**
     * @notice Multiplies two `Signed`s, reverting on overflow.
     * @dev This will "floor" the product.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return the product of `a` and `b`.
     */
    function mul(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        // There are two caveats with this computation:
        // 1. Max output for the represented number is ~10^41, otherwise an intermediate value overflows. 10^41 is
        // stored internally as an int256 ~10^59.
        // 2. Results that can't be represented exactly are truncated not rounded. E.g., 1.4 * 2e-18 = 2.8e-18, which
        // would round to 3, but this computation produces the result 2.
        // No need to use SafeMath because SFP_SCALING_FACTOR != 0.
        return Signed(a.rawValue.mul(b.rawValue) / SFP_SCALING_FACTOR);
    }

    /**
     * @notice Multiplies an `Signed` and an unscaled int256, reverting on overflow.
     * @dev This will "floor" the product.
     * @param a a FixedPoint.Signed.
     * @param b an int256.
     * @return the product of `a` and `b`.
     */
    function mul(Signed memory a, int256 b) internal pure returns (Signed memory) {
        return Signed(a.rawValue.mul(b));
    }

    /**
     * @notice Multiplies two `Signed`s and "ceil's" the product, reverting on overflow.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return the product of `a` and `b`.
     */
    function mulAwayFromZero(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        int256 mulRaw = a.rawValue.mul(b.rawValue);
        int256 mulTowardsZero = mulRaw / SFP_SCALING_FACTOR;
        // Manual mod because SignedSafeMath doesn't support it.
        int256 mod = mulRaw % SFP_SCALING_FACTOR;
        if (mod != 0) {
            bool isResultPositive = isLessThan(a, 0) == isLessThan(b, 0);
            int256 valueToAdd = isResultPositive ? int256(1) : int256(-1);
            return Signed(mulTowardsZero.add(valueToAdd));
        } else {
            return Signed(mulTowardsZero);
        }
    }

    /**
     * @notice Multiplies an `Signed` and an unscaled int256 and "ceil's" the product, reverting on overflow.
     * @param a a FixedPoint.Signed.
     * @param b a FixedPoint.Signed.
     * @return the product of `a` and `b`.
     */
    function mulAwayFromZero(Signed memory a, int256 b) internal pure returns (Signed memory) {
        // Since b is an int, there is no risk of truncation and we can just mul it normally
        return Signed(a.rawValue.mul(b));
    }

    /**
     * @notice Divides one `Signed` by an `Signed`, reverting on overflow or division by 0.
     * @dev This will "floor" the quotient.
     * @param a a FixedPoint numerator.
     * @param b a FixedPoint denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function div(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        // There are two caveats with this computation:
        // 1. Max value for the number dividend `a` represents is ~10^41, otherwise an intermediate value overflows.
        // 10^41 is stored internally as an int256 10^59.
        // 2. Results that can't be represented exactly are truncated not rounded. E.g., 2 / 3 = 0.6 repeating, which
        // would round to 0.666666666666666667, but this computation produces the result 0.666666666666666666.
        return Signed(a.rawValue.mul(SFP_SCALING_FACTOR).div(b.rawValue));
    }

    /**
     * @notice Divides one `Signed` by an unscaled int256, reverting on overflow or division by 0.
     * @dev This will "floor" the quotient.
     * @param a a FixedPoint numerator.
     * @param b an int256 denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function div(Signed memory a, int256 b) internal pure returns (Signed memory) {
        return Signed(a.rawValue.div(b));
    }

    /**
     * @notice Divides one unscaled int256 by an `Signed`, reverting on overflow or division by 0.
     * @dev This will "floor" the quotient.
     * @param a an int256 numerator.
     * @param b a FixedPoint denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function div(int256 a, Signed memory b) internal pure returns (Signed memory) {
        return div(fromUnscaledInt(a), b);
    }

    /**
     * @notice Divides one `Signed` by an `Signed` and "ceil's" the quotient, reverting on overflow or division by 0.
     * @param a a FixedPoint numerator.
     * @param b a FixedPoint denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function divAwayFromZero(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
        int256 aScaled = a.rawValue.mul(SFP_SCALING_FACTOR);
        int256 divTowardsZero = aScaled.div(b.rawValue);
        // Manual mod because SignedSafeMath doesn't support it.
        int256 mod = aScaled % b.rawValue;
        if (mod != 0) {
            bool isResultPositive = isLessThan(a, 0) == isLessThan(b, 0);
            int256 valueToAdd = isResultPositive ? int256(1) : int256(-1);
            return Signed(divTowardsZero.add(valueToAdd));
        } else {
            return Signed(divTowardsZero);
        }
    }

    /**
     * @notice Divides one `Signed` by an unscaled int256 and "ceil's" the quotient, reverting on overflow or division by 0.
     * @param a a FixedPoint numerator.
     * @param b an int256 denominator.
     * @return the quotient of `a` divided by `b`.
     */
    function divAwayFromZero(Signed memory a, int256 b) internal pure returns (Signed memory) {
        // Because it is possible that a quotient gets truncated, we can't just call "Signed(a.rawValue.div(b))"
        // similarly to mulCeil with an int256 as the second parameter. Therefore we need to convert b into an Signed.
        // This creates the possibility of overflow if b is very large.
        return divAwayFromZero(a, fromUnscaledInt(b));
    }

    /**
     * @notice Raises an `Signed` to the power of an unscaled uint256, reverting on overflow. E.g., `b=2` squares `a`.
     * @dev This will "floor" the result.
     * @param a a FixedPoint.Signed.
     * @param b a uint256 (negative exponents are not allowed).
     * @return output is `a` to the power of `b`.
     */
    function pow(Signed memory a, uint256 b) internal pure returns (Signed memory output) {
        output = fromUnscaledInt(1);
        for (uint256 i = 0; i < b; i = i.add(1)) {
            output = mul(output, a);
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

/**
 * @title Financial contract facing Oracle interface.
 * @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
 */
abstract contract OracleInterface {
    /**
     * @notice Enqueues a request (if a request isn't already present) for the given `identifier`, `time` pair.
     * @dev Time must be in the past and the identifier must be supported.
     * @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
     * @param time unix timestamp for the price request.
     */
    function requestPrice(bytes32 identifier, uint256 time) public virtual;

    /**
     * @notice Whether the price for `identifier` and `time` is available.
     * @dev Time must be in the past and the identifier must be supported.
     * @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
     * @param time unix timestamp for the price request.
     * @return bool if the DVM has resolved to a price for the given identifier and timestamp.
     */
    function hasPrice(bytes32 identifier, uint256 time) public view virtual returns (bool);

    /**
     * @notice Gets the price for `identifier` and `time` if it has already been requested and resolved.
     * @dev If the price is not available, the method reverts.
     * @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
     * @param time unix timestamp for the price request.
     * @return int256 representing the resolved price for the given identifier and timestamp.
     */
    function getPrice(bytes32 identifier, uint256 time) public view virtual returns (int256);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

interface AddressWhitelistInterface {
    function addToWhitelist(address newElement) external;

    function removeFromWhitelist(address newElement) external virtual;

    function isOnWhitelist(address newElement) external view virtual returns (bool);

    function getWhitelist() external view virtual returns (address[] memory);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/**
 * @title Financial contract facing Oracle interface.
 * @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
 */
abstract contract OptimisticOracleInterface {
    // Struct representing the state of a price request.
    enum State {
        Invalid, // Never requested.
        Requested, // Requested, no other actions taken.
        Proposed, // Proposed, but not expired or disputed yet.
        Expired, // Proposed, not disputed, past liveness.
        Disputed, // Disputed, but no DVM price returned yet.
        Resolved, // Disputed and DVM price is available.
        Settled // Final price has been set in the contract (can get here from Expired or Resolved).
    }

    // Struct representing a price request.
    struct Request {
        address proposer; // Address of the proposer.
        address disputer; // Address of the disputer.
        IERC20 currency; // ERC20 token used to pay rewards and fees.
        bool settled; // True if the request is settled.
        bool refundOnDispute; // True if the requester should be refunded their reward on dispute.
        int256 proposedPrice; // Price that the proposer submitted.
        int256 resolvedPrice; // Price resolved once the request is settled.
        uint256 expirationTime; // Time at which the request auto-settles without a dispute.
        uint256 reward; // Amount of the currency to pay to the proposer on settlement.
        uint256 finalFee; // Final fee to pay to the Store upon request to the DVM.
        uint256 bond; // Bond that the proposer and disputer must pay on top of the final fee.
        uint256 customLiveness; // Custom liveness value set by the requester.
    }

    // This value must be <= the Voting contract's `ancillaryBytesLimit` value otherwise it is possible
    // that a price can be requested to this contract successfully, but cannot be disputed because the DVM refuses
    // to accept a price request made with ancillary data length over a certain size.
    uint256 public constant ancillaryBytesLimit = 8192;

    /**
     * @notice Requests a new price.
     * @param identifier price identifier being requested.
     * @param timestamp timestamp of the price being requested.
     * @param ancillaryData ancillary data representing additional args being passed with the price request.
     * @param currency ERC20 token used for payment of rewards and fees. Must be approved for use with the DVM.
     * @param reward reward offered to a successful proposer. Will be pulled from the caller. Note: this can be 0,
     *               which could make sense if the contract requests and proposes the value in the same call or
     *               provides its own reward system.
     * @return totalBond default bond (final fee) + final fee that the proposer and disputer will be required to pay.
     * This can be changed with a subsequent call to setBond().
     */
    function requestPrice(
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData,
        IERC20 currency,
        uint256 reward
    ) external virtual returns (uint256 totalBond);

    /**
     * @notice Set the proposal bond associated with a price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @param bond custom bond amount to set.
     * @return totalBond new bond + final fee that the proposer and disputer will be required to pay. This can be
     * changed again with a subsequent call to setBond().
     */
    function setBond(
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData,
        uint256 bond
    ) external virtual returns (uint256 totalBond);

    /**
     * @notice Sets the request to refund the reward if the proposal is disputed. This can help to "hedge" the caller
     * in the event of a dispute-caused delay. Note: in the event of a dispute, the winner still receives the other's
     * bond, so there is still profit to be made even if the reward is refunded.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     */
    function setRefundOnDispute(
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) external virtual;

    /**
     * @notice Sets a custom liveness value for the request. Liveness is the amount of time a proposal must wait before
     * being auto-resolved.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @param customLiveness new custom liveness.
     */
    function setCustomLiveness(
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData,
        uint256 customLiveness
    ) external virtual;

    /**
     * @notice Proposes a price value on another address' behalf. Note: this address will receive any rewards that come
     * from this proposal. However, any bonds are pulled from the caller.
     * @param proposer address to set as the proposer.
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @param proposedPrice price being proposed.
     * @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
     * the proposer once settled if the proposal is correct.
     */
    function proposePriceFor(
        address proposer,
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData,
        int256 proposedPrice
    ) public virtual returns (uint256 totalBond);

    /**
     * @notice Proposes a price value for an existing price request.
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @param proposedPrice price being proposed.
     * @return totalBond the amount that's pulled from the proposer's wallet as a bond. The bond will be returned to
     * the proposer once settled if the proposal is correct.
     */
    function proposePrice(
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData,
        int256 proposedPrice
    ) external virtual returns (uint256 totalBond);

    /**
     * @notice Disputes a price request with an active proposal on another address' behalf. Note: this address will
     * receive any rewards that come from this dispute. However, any bonds are pulled from the caller.
     * @param disputer address to set as the disputer.
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
     * the disputer once settled if the dispute was value (the proposal was incorrect).
     */
    function disputePriceFor(
        address disputer,
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) public virtual returns (uint256 totalBond);

    /**
     * @notice Disputes a price value for an existing price request with an active proposal.
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @return totalBond the amount that's pulled from the disputer's wallet as a bond. The bond will be returned to
     * the disputer once settled if the dispute was valid (the proposal was incorrect).
     */
    function disputePrice(
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) external virtual returns (uint256 totalBond);

    /**
     * @notice Retrieves a price that was previously requested by a caller. Reverts if the request is not settled
     * or settleable. Note: this method is not view so that this call may actually settle the price request if it
     * hasn't been settled.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @return resolved price.
     */
    function settleAndGetPrice(
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) external virtual returns (int256);

    /**
     * @notice Attempts to settle an outstanding price request. Will revert if it isn't settleable.
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @return payout the amount that the "winner" (proposer or disputer) receives on settlement. This amount includes
     * the returned bonds as well as additional rewards.
     */
    function settle(
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) external virtual returns (uint256 payout);

    /**
     * @notice Gets the current data structure containing all information about a price request.
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @return the Request data structure.
     */
    function getRequest(
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) public view virtual returns (Request memory);

    /**
     * @notice Returns the state of a price request.
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @return the State enum value.
     */
    function getState(
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) public view virtual returns (State);

    /**
     * @notice Checks if a given request has resolved or been settled (i.e the optimistic oracle has a price).
     * @param requester sender of the initial price request.
     * @param identifier price identifier to identify the existing request.
     * @param timestamp timestamp to identify the existing request.
     * @param ancillaryData ancillary data of the price being requested.
     * @return true if price has resolved or settled, false otherwise.
     */
    function hasPrice(
        address requester,
        bytes32 identifier,
        uint256 timestamp,
        bytes memory ancillaryData
    ) public view virtual returns (bool);

    function stampAncillaryData(bytes memory ancillaryData, address requester)
        public
        view
        virtual
        returns (bytes memory);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

/**
 * @title Interface for whitelists of supported identifiers that the oracle can provide prices for.
 */
interface IdentifierWhitelistInterface {
    /**
     * @notice Adds the provided identifier as a supported identifier.
     * @dev Price requests using this identifier will succeed after this call.
     * @param identifier bytes32 encoding of the string identifier. Eg: BTC/USD.
     */
    function addSupportedIdentifier(bytes32 identifier) external;

    /**
     * @notice Removes the identifier from the whitelist.
     * @dev Price requests using this identifier will no longer succeed after this call.
     * @param identifier bytes32 encoding of the string identifier. Eg: BTC/USD.
     */
    function removeSupportedIdentifier(bytes32 identifier) external;

    /**
     * @notice Checks whether an identifier is on the whitelist.
     * @param identifier bytes32 encoding of the string identifier. Eg: BTC/USD.
     * @return bool if the identifier is supported (or not).
     */
    function isIdentifierSupported(bytes32 identifier) external view returns (bool);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

/**
 * @title Stores common interface names used throughout the DVM by registration in the Finder.
 */
library OracleInterfaces {
    bytes32 public constant Oracle = "Oracle";
    bytes32 public constant IdentifierWhitelist = "IdentifierWhitelist";
    bytes32 public constant Store = "Store";
    bytes32 public constant FinancialContractsAdmin = "FinancialContractsAdmin";
    bytes32 public constant Registry = "Registry";
    bytes32 public constant CollateralWhitelist = "CollateralWhitelist";
    bytes32 public constant OptimisticOracle = "OptimisticOracle";
    bytes32 public constant Bridge = "Bridge";
    bytes32 public constant GenericHandler = "GenericHandler";
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SignedSafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SignedSafeMath {
    /**
     * @dev Returns the multiplication of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two signed integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(int256 a, int256 b) internal pure returns (int256) {
        return a / b;
    }

    /**
     * @dev Returns the subtraction of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        return a - b;
    }

    /**
     * @dev Returns the addition of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(int256 a, int256 b) internal pure returns (int256) {
        return a + b;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 199
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

[{"inputs":[{"internalType":"contract FinderInterface","name":"_finder","type":"address"},{"internalType":"contract TokenFactory","name":"_tokenFactory","type":"address"},{"internalType":"address","name":"_timer","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"longShortPair","type":"address"},{"indexed":true,"internalType":"address","name":"deployerAddress","type":"address"},{"indexed":false,"internalType":"address","name":"longToken","type":"address"},{"indexed":false,"internalType":"address","name":"shortToken","type":"address"}],"name":"CreatedLongShortPair","type":"event"},{"inputs":[{"components":[{"internalType":"string","name":"pairName","type":"string"},{"internalType":"uint64","name":"expirationTimestamp","type":"uint64"},{"internalType":"uint256","name":"collateralPerPair","type":"uint256"},{"internalType":"bytes32","name":"priceIdentifier","type":"bytes32"},{"internalType":"string","name":"longSynthName","type":"string"},{"internalType":"string","name":"longSynthSymbol","type":"string"},{"internalType":"string","name":"shortSynthName","type":"string"},{"internalType":"string","name":"shortSynthSymbol","type":"string"},{"internalType":"contract IERC20Standard","name":"collateralToken","type":"address"},{"internalType":"contract LongShortPairFinancialProductLibrary","name":"financialProductLibrary","type":"address"},{"internalType":"bytes","name":"customAncillaryData","type":"bytes"},{"internalType":"uint256","name":"prepaidProposerReward","type":"uint256"},{"internalType":"uint256","name":"optimisticOracleLivenessTime","type":"uint256"},{"internalType":"uint256","name":"optimisticOracleProposerBond","type":"uint256"}],"internalType":"struct LongShortPairCreator.CreatorParams","name":"params","type":"tuple"}],"name":"createLongShortPair","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"finder","outputs":[{"internalType":"contract FinderInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"time","type":"uint256"}],"name":"setCurrentTime","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"timerAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenFactory","outputs":[{"internalType":"contract TokenFactory","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000b22033ff04ad01fbe8d78ef4622a20626834271b00000000000000000000000056f2c8353049270d3553773e680b0d6c632544b60000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _finder (address): 0xb22033ff04ad01fbe8d78ef4622a20626834271b
Arg [1] : _tokenFactory (address): 0x56f2c8353049270d3553773e680b0d6c632544b6
Arg [2] : _timer (address): 0x0000000000000000000000000000000000000000

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000b22033ff04ad01fbe8d78ef4622a20626834271b
Arg [1] : 00000000000000000000000056f2c8353049270d3553773e680b0d6c632544b6
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000000