Contract 0x98fAb5d1366DE24f152ea683A1f23338351C47EA

 

Contract Overview

Balance:
0 MATIC

MATIC Value:
$0.00

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Txn Hash Method
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0x70d48c83f1a4900723140cc0d7722790847a271cdc892ef00ed21fe5fec73200Transfer222146082021-12-06 20:56:406 hrs 39 mins ago0xa4444f96cd813dacd14b1c183c30261fff3a5aae IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.00103503
0xb1fb9cbdc16329bafa9ef26146c2f665c5de8fa1f463201f689953e6a35c1c8bTransfer217996172021-11-25 22:12:0411 days 5 hrs ago0xa4444f96cd813dacd14b1c183c30261fff3a5aae IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.00154839
0xac5f9aabb6926f3febe2fe33b1d1e0b8f10ff48eed6f1340f9596cce877d6f240xb52f71bd216839372021-11-22 21:00:1114 days 6 hrs ago0xa4444f96cd813dacd14b1c183c30261fff3a5aae IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.0194112435
0xc456d77fc5a64dd404b7f1fcc8b6807cf64e640a125a6778e86db90899323441Transfer216824152021-11-22 20:03:3514 days 7 hrs ago0xc31249ba48763df46388ba5c4e7565d62ed4801c IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.00109983
0x98af43c9f30947c99b87380e5df0a352c9b3702ec65a6bddd54ee96663a853bc0xcbd4b9e8215563922021-11-19 13:54:4717 days 13 hrs ago0xc31249ba48763df46388ba5c4e7565d62ed4801c IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.0142792584
0x42ebae8406b1e696e99c66f9694dadf08195b2490174b44f489b5b02f3214a0f0xcbd4b9e8207060342021-10-28 14:24:4239 days 13 hrs ago0xc31249ba48763df46388ba5c4e7565d62ed4801c IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.013545444
0xddd38cfe4cb6f1f122dbcfdf83b961731cca374f56b5382e6db8f5ec26a8540eMint From Peg Sy...206323202021-10-26 13:05:3941 days 14 hrs ago0x2b041ca81998ebe6dbf7c1ed6e7dba9aaadb9650 IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.004471488
0x9390d496f77ac4d595e77a0f2ec0b40fccd007a6ab596822a413f4dab66120df0xd44e19a6206273132021-10-26 9:49:1641 days 17 hrs agoJarvis Network: Deployer IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.1969978662
0x27153a283e62a11646f2d111eba3964d9310001f0139635a248decdc869849bd0xe6f3356b206272882021-10-26 9:48:2641 days 17 hrs agoJarvis Network: Deployer IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.05965443
0xc23f3c90b34be9f370615b082c30b738743309b3e7be2544e48e05a1f5ca5d510xe6f3356b206270372021-10-26 9:37:4041 days 17 hrs ago0xf6b4d07f6fd5b5801b42d641a42ae4c134590ece IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.0231141
0x32c1413b9a2349e85c5d47912eaf415fe7ca52f3946a4bd0e018b92a5c5eaf20Redeem To Peg Sy...206014782021-10-25 16:36:5042 days 10 hrs agoJarvis Network: Deployer IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.0014752045
0xf9766365cb141bb2aeb4b0593890c21e849d8c9a5235ddaa8e3d73c4305be1be0xcbd4b9e8206014082021-10-25 16:34:2642 days 11 hrs agoJarvis Network: Deployer IN  0x98fab5d1366de24f152ea683a1f23338351c47ea0 MATIC0.018274152
0x00af7b7ec774b37dfbf5b2a5378909fdcecd9670d978e08dcfd91f60d4c89d1d0x60a06040189571012021-09-10 14:51:3587 days 12 hrs agoJarvis Network: Deployer IN  Contract Creation0 MATIC0.1071848
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x60e91fc3a60362ca44aea0263dbc4b96302f6ade

Contract Name:
FixedRateCurrency

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at polygonscan.com on 2021-09-06
*/

// File: @jarvis-network/synthereum-contracts/contracts/core/Constants.sol


pragma solidity ^0.8.4;

/**
 * @title Stores common interface names used throughout Synthereum.
 */
library SynthereumInterfaces {
  bytes32 public constant Deployer = 'Deployer';
  bytes32 public constant FactoryVersioning = 'FactoryVersioning';
  bytes32 public constant TokenFactory = 'TokenFactory';
  bytes32 public constant PoolRegistry = 'PoolRegistry';
  bytes32 public constant SelfMintingRegistry = 'SelfMintingRegistry';
  bytes32 public constant PriceFeed = 'PriceFeed';
  bytes32 public constant Manager = 'Manager';
  bytes32 public constant SelfMintingController = 'SelfMintingController';
}

library FactoryInterfaces {
  bytes32 public constant PoolFactory = 'PoolFactory';
  bytes32 public constant DerivativeFactory = 'DerivativeFactory';
  bytes32 public constant SelfMintingFactory = 'SelfMintingFactory';
}

// File: @jarvis-network/synthereum-contracts/contracts/core/registries/interfaces/IRegistry.sol


pragma solidity ^0.8.4;


/**
 * @title Provides interface with functions of SynthereumRegistry
 */

interface ISynthereumRegistry {
  /**
   * @notice Allow the deployer to register an element
   * @param syntheticTokenSymbol Symbol of the syntheticToken
   * @param collateralToken Collateral ERC20 token of the element deployed
   * @param version Version of the element deployed
   * @param element Address of the element deployed
   */
  function register(
    string calldata syntheticTokenSymbol,
    IERC20 collateralToken,
    uint8 version,
    address element
  ) external;

  /**
   * @notice Returns if a particular element exists or not
   * @param syntheticTokenSymbol Synthetic token symbol of the element
   * @param collateralToken ERC20 contract of collateral currency
   * @param version Version of the element
   * @param element Contract of the element to check
   * @return isElementDeployed Returns true if a particular element exists, otherwise false
   */
  function isDeployed(
    string calldata syntheticTokenSymbol,
    IERC20 collateralToken,
    uint8 version,
    address element
  ) external view returns (bool isElementDeployed);

  /**
   * @notice Returns all the elements with partcular symbol, collateral and version
   * @param syntheticTokenSymbol Synthetic token symbol of the element
   * @param collateralToken ERC20 contract of collateral currency
   * @param version Version of the element
   * @return List of all elements
   */
  function getElements(
    string calldata syntheticTokenSymbol,
    IERC20 collateralToken,
    uint8 version
  ) external view returns (address[] memory);

  /**
   * @notice Returns all the synthetic token symbol used
   * @return List of all synthetic token symbol
   */
  function getSyntheticTokens() external view returns (string[] memory);

  /**
   * @notice Returns all the versions used
   * @return List of all versions
   */
  function getVersions() external view returns (uint8[] memory);

  /**
   * @notice Returns all the collaterals used
   * @return List of all collaterals
   */
  function getCollaterals() external view returns (address[] memory);
}

// File: @jarvis-network/synthereum-contracts/contracts/synthereum-pool/common/interfaces/IPoolInteraction.sol


pragma solidity ^0.8.4;

interface ISynthereumPoolInteraction {
  /**
   * @notice Called by a source Pool's `exchange` function to mint destination tokens
   * @notice This functon can be called only by a pool registred in the PoolRegister contract
   * @param srcDerivative Derivative used by the source pool
   * @param derivative The derivative of the destination pool to use for mint
   * @param collateralAmount The amount of collateral to use from the source Pool
   * @param numTokens The number of new tokens to mint
   */
  function exchangeMint(
    IDerivative srcDerivative,
    IDerivative derivative,
    uint256 collateralAmount,
    uint256 numTokens
  ) external;

  /**
   * @notice Returns price identifier of the pool
   * @return identifier Price identifier
   */
  function getPriceFeedIdentifier() external view returns (bytes32 identifier);
}

pragma solidity ^0.8.4;

/**
 * @title Interface that a pool MUST have in order to be included in the deployer
 */
interface ISynthereumPoolDeployment {
  /**
   * @notice Get Synthereum finder of the pool
   * @return finder Returns finder contract
   */
  function synthereumFinder() external view returns (ISynthereumFinder finder);

  /**
   * @notice Get Synthereum version
   * @return poolVersion Returns the version of this Synthereum pool
   */
  function version() external view returns (uint8 poolVersion);

  /**
   * @notice Get the collateral token
   * @return collateralCurrency The ERC20 collateral token
   */
  function collateralToken() external view returns (IERC20 collateralCurrency);

  /**
   * @notice Get the synthetic token associated to this pool
   * @return syntheticCurrency The ERC20 synthetic token
   */
  function syntheticToken() external view returns (IERC20 syntheticCurrency);

  /**
   * @notice Get the synthetic token symbol associated to this pool
   * @return symbol The ERC20 synthetic token symbol
   */
  function syntheticTokenSymbol() external view returns (string memory symbol);

  function isDerivativeAdmitted(address derivative)
    external
    view
    returns (bool isAdmitted);
}


// File: @jarvis-network/synthereum-contracts/contracts/synthereum-pool/common/interfaces/IPoolGeneral.sol


pragma solidity ^0.8.4;



interface ISynthereumPoolGeneral is
  ISynthereumPoolDeployment,
  ISynthereumPoolInteraction
{}

// File: @openzeppelin/contracts/utils/structs/EnumerableSet.sol



pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;

        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) { // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }


    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

// File: @jarvis-network/synthereum-contracts/contracts/derivative/self-minting/common/interfaces/ISelfMintingDerivativeDeployment.sol


pragma solidity ^0.8.4;



/** @title Interface for interacting with SelfMintingDerivativeDeployment contract
 */
interface ISelfMintingDerivativeDeployment {
  /** @notice Returns the address of the SynthereumFinder contract
   */
  function synthereumFinder() external view returns (ISynthereumFinder finder);

  /** @notice Returns the address of the collateralCurrency contract
   */
  function collateralCurrency() external view returns (IERC20 collateral);

  /** @notice Returns the address of the synthetic token contract
   */
  function tokenCurrency() external view returns (IERC20 syntheticCurrency);

  /** @notice Returns the synthetic token symbol
   */
  function syntheticTokenSymbol() external view returns (string memory symbol);

  /** @notice Returns the version of the deployed self-minting derivative
   */
  function version() external view returns (uint8 selfMintingversion);
}

// File: @jarvis-network/synthereum-contracts/contracts/base/interfaces/IRole.sol


pragma solidity ^0.8.4;

/**
 * @title Access role interface
 */
interface IRole {
  /**
   * @dev Returns `true` if `account` has been granted `role`.
   */
  function hasRole(bytes32 role, address account) external view returns (bool);

  /**
   * @dev Returns the number of accounts that have `role`. Can be used
   * together with {getRoleMember} to enumerate all bearers of a role.
   */
  function getRoleMemberCount(bytes32 role) external view returns (uint256);

  /**
   * @dev Returns one of the accounts that have `role`. `index` must be a
   * value between 0 and {getRoleMemberCount}, non-inclusive.
   *
   */
  function getRoleMember(bytes32 role, uint256 index)
    external
    view
    returns (address);

  /**
   * @dev Returns the admin role that controls `role`. See {grantRole} and
   * {revokeRole}.
   */
  function getRoleAdmin(bytes32 role) external view returns (bytes32);

  /**
   * @dev Grants `role` to `account`.
   *
   * - the caller must have ``role``'s admin role.
   */
  function grantRole(bytes32 role, address account) external;

  /**
   * @dev Revokes `role` from `account`.
   *
   * - the caller must have ``role``'s admin role.
   */
  function revokeRole(bytes32 role, address account) external;

  /**
   * @dev Revokes `role` from the calling account.
   *
   * Roles are often managed via {grantRole} and {revokeRole}: this function's
   * purpose is to provide a mechanism for accounts to lose their privileges
   * if they are compromised (such as when a trusted device is misplaced).
   *
   * - the caller must be `account`.
   */
  function renounceRole(bytes32 role, address account) external;
}

// File: @jarvis-network/synthereum-contracts/contracts/synthereum-pool/common/interfaces/IPoolDeployment.sol



// File: @jarvis-network/synthereum-contracts/contracts/core/interfaces/IDeployer.sol


pragma solidity ^0.8.4;


/**
 * @title Provides interface with functions of Synthereum deployer
 */
interface ISynthereumDeployer {
  /**
   * @notice Deploys derivative and pool linking the contracts together
   * @param derivativeVersion Version of derivative contract
   * @param poolVersion Version of the pool contract
   * @param derivativeParamsData Input params of derivative constructor
   * @param poolParamsData Input params of pool constructor
   * @return derivative Derivative contract deployed
   * @return pool Pool contract deployed
   */
  function deployPoolAndDerivative(
    uint8 derivativeVersion,
    uint8 poolVersion,
    bytes calldata derivativeParamsData,
    bytes calldata poolParamsData
  )
    external
    returns (IDerivativeDeployment derivative, ISynthereumPoolDeployment pool);

  /**
   * @notice Deploys a pool and links it with an already existing derivative
   * @param poolVersion Version of the pool contract
   * @param poolParamsData Input params of pool constructor
   * @param derivative Existing derivative contract to link with the new pool
   * @return pool Pool contract deployed
   */
  function deployOnlyPool(
    uint8 poolVersion,
    bytes calldata poolParamsData,
    IDerivativeDeployment derivative
  ) external returns (ISynthereumPoolDeployment pool);

  /**
   * @notice Deploys a derivative and option to links it with an already existing pool
   * @param derivativeVersion Version of the derivative contract
   * @param derivativeParamsData Input params of derivative constructor
   * @param pool Existing pool contract to link with the new derivative
   * @return derivative Derivative contract deployed
   */
  function deployOnlyDerivative(
    uint8 derivativeVersion,
    bytes calldata derivativeParamsData,
    ISynthereumPoolDeployment pool
  ) external returns (IDerivativeDeployment derivative);

  function deployOnlySelfMintingDerivative(
    uint8 selfMintingDerVersion,
    bytes calldata selfMintingDerParamsData
  ) external returns (ISelfMintingDerivativeDeployment selfMintingDerivative);
}

// File: @jarvis-network/synthereum-contracts/contracts/derivative/common/interfaces/IDerivativeDeployment.sol


pragma solidity ^0.8.4;


/**
 * @title Interface that a derivative MUST have in order to be included in the deployer
 */
interface IDerivativeDeployment {
  /**
   * @notice Gets the collateral currency of the derivative
   * @return collateral Collateral currency
   */
  function collateralCurrency() external view returns (IERC20 collateral);

  /**
   * @notice Get the token currency of the derivative
   * @return syntheticCurrency Synthetic token
   */
  function tokenCurrency() external view returns (IERC20 syntheticCurrency);

  /**
   * @notice Accessor method for the list of members with admin role
   * @return array of addresses with admin role
   */
  function getAdminMembers() external view returns (address[] memory);

  /**
   * @notice Accessor method for the list of members with pool role
   * @return array of addresses with pool role
   */
  function getPoolMembers() external view returns (address[] memory);
}

// File: @jarvis-network/synthereum-contracts/contracts/core/interfaces/IFinder.sol


pragma solidity ^0.8.4;

/**
 * @title Provides addresses of the contracts implementing certain interfaces.
 */
interface ISynthereumFinder {
  /**
   * @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);
}

// File: @jarvis-network/synthereum-contracts/contracts/derivative/common/interfaces/IDerivativeMain.sol


pragma solidity ^0.8.4;

/**
 * @title Interface for interacting with the Derivatives contracts
 */
interface IDerivativeMain {
  /** @notice Deposit funds to a certain derivative contract with specified sponsor
   * @param sponsor Address of the sponsor to which the funds will be deposited
   * @param collateralAmount Amount of funds to be deposited
   */
  function depositTo(
    address sponsor,
    FixedPoint.Unsigned memory collateralAmount
  ) external;

  /** @notice Deposit funds to the derivative contract where msg sender is the sponsor
   * @param collateralAmount Amount of funds to be deposited
   */
  function deposit(FixedPoint.Unsigned memory collateralAmount) external;

  /** @notice Fast withdraw excess collateral from a derivative contract
   * @param collateralAmount Amount of funds to be withdrawn
   */
  function withdraw(FixedPoint.Unsigned memory collateralAmount)
    external
    returns (FixedPoint.Unsigned memory amountWithdrawn);

  /** @notice Request of slow withdraw of collateral from derivative changing GCR
   * @param collateralAmount Amount of funds to be withdrawn
   */
  function requestWithdrawal(FixedPoint.Unsigned memory collateralAmount)
    external;

  /** @notice Execute withdraw if a slow withdraw request has passed
   */
  function withdrawPassedRequest()
    external
    returns (FixedPoint.Unsigned memory amountWithdrawn);

  /** @notice Cancel a slow withdraw request
   */
  function cancelWithdrawal() external;

  /** @notice Mint synthetic tokens
   * @param collateralAmount Amount of collateral to be locked
   * @param numTokens Amount of tokens to be minted based on collateralAmount
   */
  function create(
    FixedPoint.Unsigned memory collateralAmount,
    FixedPoint.Unsigned memory numTokens
  ) external;

  /** @notice Redeem collateral by burning synthetic tokens
   * @param numTokens Amount of synthetic tokens to be burned to unlock collateral
   */
  function redeem(FixedPoint.Unsigned memory numTokens)
    external
    returns (FixedPoint.Unsigned memory amountWithdrawn);

  /** @notice Burning an amount of synthetic tokens to increase GCR
   * @param numTokens Amount of synthetic tokens to be burned
   */
  function repay(FixedPoint.Unsigned memory numTokens) external;

  /** @notice Settles the withdraws from an emergency shutdown of a derivative
   */
  function settleEmergencyShutdown()
    external
    returns (FixedPoint.Unsigned memory amountWithdrawn);

  /** @notice Invokes an emergency shutdown of a derivative
   */
  function emergencyShutdown() external;

  /** @notice Remargin function
   */
  function remargin() external;

  /** @notice Allows withdrawing of excess ERC20 tokens
   * @param token The address of the ERC20 token
   */
  function trimExcess(IERC20 token)
    external
    returns (FixedPoint.Unsigned memory amount);

  /** @notice Gets the collateral locked by a certain sponsor
   * @param sponsor The address of the sponsor for which to return amount of collateral locked
   */
  function getCollateral(address sponsor)
    external
    view
    returns (FixedPoint.Unsigned memory collateralAmount);

  /** @notice Gets the address of the SynthereumFinder contract
   */
  function synthereumFinder() external view returns (ISynthereumFinder finder);

  /** @notice Gets the synthetic token symbol associated with the derivative
   */
  function syntheticTokenSymbol() external view returns (string memory symbol);

  /** @notice Gets the price identifier associated with the derivative
   */
  function priceIdentifier() external view returns (bytes32 identifier);

  /** @notice Gets the total collateral locked in a derivative
   */
  function totalPositionCollateral()
    external
    view
    returns (FixedPoint.Unsigned memory totalCollateral);

  /** @notice Gets the total synthetic tokens minted through a derivative
   */
  function totalTokensOutstanding()
    external
    view
    returns (FixedPoint.Unsigned memory totalTokens);

  /** @notice Gets the price at which the emergency shutdown was performed
   */
  function emergencyShutdownPrice()
    external
    view
    returns (FixedPoint.Unsigned memory emergencyPrice);
}

// File: @jarvis-network/synthereum-contracts/contracts/derivative/common/interfaces/IDerivative.sol


pragma solidity ^0.8.4;



/**
 * @title Interface that a derivative MUST have in order to be used in the pools
 */
interface IDerivative is IDerivativeDeployment, IDerivativeMain {

}

// File: @openzeppelin/contracts/utils/math/SignedSafeMath.sol



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;
    }
}

// File: @uma/core/contracts/common/implementation/FixedPoint.sol


pragma solidity ^0.8.0;



/**
 * @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);
        }
    }
}

// File: @jarvis-network/synthereum-contracts/contracts/synthereum-pool/v4/interfaces/IPoolOnChainPriceFeed.sol


pragma solidity ^0.8.4;

/**
 * @title Token Issuer Contract Interface
 */
interface ISynthereumPoolOnChainPriceFeed is ISynthereumPoolDeployment {
  // Describe fee structure
  struct Fee {
    // Fees charged when a user mints, redeem and exchanges tokens
    FixedPoint.Unsigned feePercentage;
    address[] feeRecipients;
    uint32[] feeProportions;
  }

  // Describe role structure
  struct Roles {
    address admin;
    address maintainer;
    address liquidityProvider;
  }

  struct MintParams {
    // Derivative to use
    IDerivative derivative;
    // Minimum amount of synthetic tokens that a user wants to mint using collateral (anti-slippage)
    uint256 minNumTokens;
    // Amount of collateral that a user wants to spend for minting
    uint256 collateralAmount;
    // Maximum amount of fees in percentage that user is willing to pay
    uint256 feePercentage;
    // Expiration time of the transaction
    uint256 expiration;
    // Address to which send synthetic tokens minted
    address recipient;
  }

  struct RedeemParams {
    // Derivative to use
    IDerivative derivative;
    // Amount of synthetic tokens that user wants to use for redeeming
    uint256 numTokens;
    // Minimium amount of collateral that user wants to redeem (anti-slippage)
    uint256 minCollateral;
    // Maximum amount of fees in percentage that user is willing to pay
    uint256 feePercentage;
    // Expiration time of the transaction
    uint256 expiration;
    // Address to which send collateral tokens redeemed
    address recipient;
  }

  struct ExchangeParams {
    // Derivative of source pool
    IDerivative derivative;
    // Destination pool
    ISynthereumPoolGeneral destPool;
    // Derivative of destination pool
    IDerivative destDerivative;
    // Amount of source synthetic tokens that user wants to use for exchanging
    uint256 numTokens;
    // Minimum Amount of destination synthetic tokens that user wants to receive (anti-slippage)
    uint256 minDestNumTokens;
    // Maximum amount of fees in percentage that user is willing to pay
    uint256 feePercentage;
    // Expiration time of the transaction
    uint256 expiration;
    // Address to which send synthetic tokens exchanged
    address recipient;
  }

  /**
   * @notice Add a derivate to be controlled by this pool
   * @param derivative A perpetual derivative
   */
  function addDerivative(IDerivative derivative) external;

  /**
   * @notice Remove a derivative controlled by this pool
   * @param derivative A perpetual derivative
   */
  function removeDerivative(IDerivative derivative) external;

  /**
   * @notice Mint synthetic tokens using fixed amount of collateral
   * @notice This calculate the price using on chain price feed
   * @notice User must approve collateral transfer for the mint request to succeed
   * @param mintParams Input parameters for minting (see MintParams struct)
   * @return syntheticTokensMinted Amount of synthetic tokens minted by a user
   * @return feePaid Amount of collateral paid by the minter as fee
   */
  function mint(MintParams memory mintParams)
    external
    returns (uint256 syntheticTokensMinted, uint256 feePaid);

  /**
   * @notice Redeem amount of collateral using fixed number of synthetic token
   * @notice This calculate the price using on chain price feed
   * @notice User must approve synthetic token transfer for the redeem request to succeed
   * @param redeemParams Input parameters for redeeming (see RedeemParams struct)
   * @return collateralRedeemed Amount of collateral redeeem by user
   * @return feePaid Amount of collateral paid by user as fee
   */
  function redeem(RedeemParams memory redeemParams)
    external
    returns (uint256 collateralRedeemed, uint256 feePaid);

  /**
   * @notice Exchange a fixed amount of synthetic token of this pool, with an amount of synthetic tokens of an another pool
   * @notice This calculate the price using on chain price feed
   * @notice User must approve synthetic token transfer for the redeem request to succeed
   * @param exchangeParams Input parameters for exchanging (see ExchangeParams struct)
   * @return destNumTokensMinted Amount of collateral redeeem by user
   * @return feePaid Amount of collateral paid by user as fee
   */
  function exchange(ExchangeParams memory exchangeParams)
    external
    returns (uint256 destNumTokensMinted, uint256 feePaid);

  /**
   * @notice Called by a source TIC's `exchange` function to mint destination tokens
   * @notice This functon can be called only by a pool registred in the PoolRegister contract
   * @param srcDerivative Derivative used by the source pool
   * @param derivative The derivative of the destination pool to use for mint
   * @param collateralAmount The amount of collateral to use from the source TIC
   * @param numTokens The number of new tokens to mint
   */
  function exchangeMint(
    IDerivative srcDerivative,
    IDerivative derivative,
    uint256 collateralAmount,
    uint256 numTokens
  ) external;

  /**
   * @notice Liquidity provider withdraw margin from the pool
   * @param collateralAmount The amount of margin to withdraw
   */
  function withdrawFromPool(uint256 collateralAmount) external;

  /**
   * @notice Move collateral from Pool to its derivative in order to increase GCR
   * @param derivative Derivative on which to deposit collateral
   * @param collateralAmount The amount of collateral to move into derivative
   */
  function depositIntoDerivative(
    IDerivative derivative,
    uint256 collateralAmount
  ) external;

  /**
   * @notice Start a slow withdrawal request
   * @notice Collateral can be withdrawn once the liveness period has elapsed
   * @param derivative Derivative from which collateral withdrawal is requested
   * @param collateralAmount The amount of excess collateral to withdraw
   */
  function slowWithdrawRequest(IDerivative derivative, uint256 collateralAmount)
    external;

  /**
   * @notice Withdraw collateral after a withdraw request has passed it's liveness period
   * @param derivative Derivative from which collateral withdrawal is requested
   * @return amountWithdrawn Amount of collateral withdrawn by slow withdrawal
   */
  function slowWithdrawPassedRequest(IDerivative derivative)
    external
    returns (uint256 amountWithdrawn);

  /**
   * @notice Withdraw collateral immediately if the remaining collateral is above GCR
   * @param derivative Derivative from which fast withdrawal is requested
   * @param collateralAmount The amount of excess collateral to withdraw
   * @return amountWithdrawn Amount of collateral withdrawn by fast withdrawal
   */
  function fastWithdraw(IDerivative derivative, uint256 collateralAmount)
    external
    returns (uint256 amountWithdrawn);

  /**
   * @notice Redeem tokens after contract emergency shutdown
   * @param derivative Derivative for which settlement is requested
   * @return amountSettled Amount of collateral withdrawn after emergency shutdown
   */
  function settleEmergencyShutdown(IDerivative derivative)
    external
    returns (uint256 amountSettled);

  /**
   * @notice Update the fee percentage, recipients and recipient proportions
   * @param _fee Fee struct containing percentage, recipients and proportions
   */
  function setFee(Fee memory _fee) external;

  /**
   * @notice Update the fee percentage
   * @param _feePercentage The new fee percentage
   */
  function setFeePercentage(uint256 _feePercentage) external;

  /**
   * @notice Update the addresses of recipients for generated fees and proportions of fees each address will receive
   * @param _feeRecipients An array of the addresses of recipients that will receive generated fees
   * @param _feeProportions An array of the proportions of fees generated each recipient will receive
   */
  function setFeeRecipients(
    address[] memory _feeRecipients,
    uint32[] memory _feeProportions
  ) external;

  /**
   * @notice Reset the starting collateral ratio - for example when you add a new derivative without collateral
   * @param startingCollateralRatio Initial ratio between collateral amount and synth tokens
   */
  function setStartingCollateralization(uint256 startingCollateralRatio)
    external;

  /**
   * @notice Get all the derivatives associated to this pool
   * @return Return list of all derivatives
   */
  function getAllDerivatives() external view returns (IDerivative[] memory);

  /**
   * @notice Get the starting collateral ratio of the pool
   * @return startingCollateralRatio Initial ratio between collateral amount and synth tokens
   */
  function getStartingCollateralization()
    external
    view
    returns (uint256 startingCollateralRatio);

  /**
   * @notice Returns infos about fee set
   * @return fee Percentage and recipients of fee
   */
  function getFeeInfo() external view returns (Fee memory fee);

  /**
   * @notice Calculate the fees a user will have to pay to mint tokens with their collateral
   * @param collateralAmount Amount of collateral on which fees are calculated
   * @return fee Amount of fee that must be paid by the user
   */
  function calculateFee(uint256 collateralAmount)
    external
    view
    returns (uint256 fee);

  /**
   * @notice Returns price identifier of the pool
   * @return identifier Price identifier
   */
  function getPriceFeedIdentifier() external view returns (bytes32 identifier);
}

// File: @jarvis-network/atomic-swap/contracts/interfaces/IAtomicSwap.sol

pragma solidity ^0.8.4;


interface IAtomicSwap {
  function swapExactTokensAndMint(
    uint256 tokenAmountIn,
    uint256 collateralAmountOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.MintParams memory mintParams
  )
    external
    returns (
      uint256 collateralOut,
      IERC20 synthToken,
      uint256 syntheticTokensMinted
    );

  function swapTokensForExactAndMint(
    uint256 tokenAmountIn,
    uint256 collateralAmountOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.MintParams memory mintParams
  )
    external
    returns (
      uint256 collateralOut,
      IERC20 synthToken,
      uint256 syntheticTokensMinted
    );

  function redeemAndSwapExactTokens(
    uint256 amountTokenOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.RedeemParams memory redeemParams,
    address recipient
  )
    external
    returns (
      uint256 collateralRedeemed,
      IERC20 outputToken,
      uint256 outputTokenAmount
    );

  function redeemAndSwapTokensForExact(
    uint256 amountTokenOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.RedeemParams memory redeemParams,
    address recipient
  )
    external
    returns (
      uint256 collateralRedeemed,
      IERC20 outputToken,
      uint256 outputTokenAmount
    );

  function swapExactETHAndMint(
    uint256 collateralAmountOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.MintParams memory mintParams
  )
    external
    payable
    returns (
      uint256 collateralOut,
      IERC20 synthToken,
      uint256 syntheticTokensMinted
    );

  function swapETHForExactAndMint(
    uint256 collateralAmountOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.MintParams memory mintParams
  )
    external
    payable
    returns (
      uint256 collateralOut,
      IERC20 synthToken,
      uint256 syntheticTokensMinted
    );

  function redeemAndSwapExactTokensForETH(
    uint256 amountTokenOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.RedeemParams memory redeemParams,
    address recipient
  )
    external
    returns (
      uint256 collateralRedeemed,
      IERC20 outputToken,
      uint256 outputTokenAmount
    );

  function redeemAndSwapTokensForExactETH(
    uint256 amountTokenOut,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed synthereumPool,
    ISynthereumPoolOnChainPriceFeed.RedeemParams memory redeemParams,
    address recipient
  )
    external
    returns (
      uint256 collateralRedeemed,
      IERC20 outputToken,
      uint256 outputTokenAmount
    );
}

// File: @openzeppelin/contracts/utils/Context.sol



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;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



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);
}



// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol



pragma solidity ^0.8.0;


/**
 * @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);
}

// File: @openzeppelin/contracts/token/ERC20/ERC20.sol



pragma solidity ^0.8.0;




/**
 * @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 { }
}

// File: @openzeppelin/contracts/utils/Address.sol



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);
            }
        }
    }
}


// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol



pragma solidity ^0.8.0;



/**
 * @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");
        }
    }
}

// File: @openzeppelin/contracts/utils/math/SafeMath.sol



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;
        }
    }
}

// File: libs/legacy-currency-contracts/contracts/fixed-rate-currency/FixedRateWrapper.sol



pragma solidity ^0.8.4;





contract FixedRateWrapper is ERC20 {
  using SafeMath for uint256;
  using SafeERC20 for IERC20;

  // Precision for math operations
  uint256 public constant PRECISION = 1e18;

  // The synthetic token to which the legacy currency is pegged
  IERC20 public immutable synth;

  // The rate at which the conversion happens
  uint256 public rate;

  // A variable to track total deposited amount of synthetic tokens
  uint256 public total_deposited;

  /** @notice Constructs the ERC20 contract and sets the immutable variables
   * @param _token - The synthetic token to which the legacy currency is pegged
   * @param _rate - The rate at which the conversion happens
   * @param _name - The name of the synthetic legacy currency token
   * @param _symbol - The symbol of the synthetic legacy currency token
   */
  constructor(
    IERC20 _token,
    uint256 _rate,
    string memory _name,
    string memory _symbol
  ) public ERC20(_name, _symbol) {
    synth = _token;
    rate = _rate;
  }

  /** @notice - An internal function which mints new fixedRate tokens according to the rate with it's peg synth
   * @param _amount - The amount of synthetic tokens the user wants to exchange
   */
  function wrap(uint256 _amount, address recipient)
    internal
    returns (uint256 amountTokens)
  {
    amountTokens = _amount.mul(rate).div(PRECISION);
    total_deposited = total_deposited.add(_amount);
    _mint(recipient, amountTokens);
  }

  /** @notice - A internal function which burns fixedRate tokens releasing peg synthetic tokens to a recipient
   * @param _amount - The amount of legacy synthetic tokens the user wants to deposit and burn
   */
  function unwrap(uint256 _amount, address recipient)
    internal
    returns (uint256 amountTokens)
  {
    require(balanceOf(msg.sender) >= _amount, 'Not enought tokens to unwrap');
    amountTokens = total_deposited.mul(_amount).div(totalSupply());
    _burn(msg.sender, _amount);
    total_deposited = total_deposited.sub(amountTokens);
    synth.safeTransfer(recipient, amountTokens);
  }
}

// File: libs/legacy-currency-contracts/contracts/fixed-rate-currency/FixedRateCurrency.sol



pragma solidity ^0.8.4;
pragma experimental ABIEncoderV2;


contract FixedRateCurrency is FixedRateWrapper {
  using SafeMath for uint256;
  using SafeERC20 for IERC20;

  bool public paused; // Prevents minting when true

  ISynthereumFinder public synthereumFinder;
  ISynthereumPoolOnChainPriceFeed public synthereumPool; // pegSynth-USDC pool
  IERC20 public collateralInstance; // synthereum pool collateral (USDC)
  IAtomicSwap public atomicSwap;

  address public admin;
  //----------------------------------------
  // Events
  //----------------------------------------
  event Mint(
    address indexed account,
    address indexed tokenCollateral,
    address indexed tokenAddress,
    uint256 numTokens
  );

  event Redeem(
    address indexed account,
    address indexed tokenBurned,
    address indexed tokenRedeemed,
    uint256 numTokensRedeemed
  );

  event SwapWithSynth(
    address indexed account,
    address indexed synth,
    address indexed tokenAddress,
    uint256 numTokens,
    string side
  );

  event SwapWithERC20(
    address indexed account,
    address indexed ERC20Address,
    address indexed synthToken,
    string side,
    uint256 numTokensIn,
    uint256 numTokensOut
  );

  event SwapWithETH(
    address indexed account,
    string side,
    uint256 numTokensIn,
    uint256 numTokensOut
  );

  event ContractPaused();
  event ContractResumed();

  event RateChange(uint256 oldRate, uint256 newRate);
  //----------------------------------------
  // Modifiers
  //----------------------------------------

  modifier isActive() {
    require(!paused, 'Contract has been paused');
    _;
  }

  modifier onlyAdmin() {
    require(msg.sender == admin, 'Only contract admin can call this function');
    _;
  }

  constructor(
    IERC20 _pegToken,
    IERC20 _collateralToken,
    ISynthereumPoolOnChainPriceFeed _synthereumPoolAddress,
    ISynthereumFinder _synthereumFinder,
    IAtomicSwap _atomicSwapAddr,
    address _admin,
    uint256 _rate,
    string memory _name,
    string memory _symbol
  ) public FixedRateWrapper(_pegToken, _rate, _name, _symbol) {
    paused = false;
    synthereumFinder = _synthereumFinder;
    synthereumPool = _synthereumPoolAddress;
    collateralInstance = _collateralToken;
    admin = _admin;
    atomicSwap = _atomicSwapAddr;

    address synthAddress;
    address collateralAddress;
    // check the appropriate pool is passed
    (collateralAddress, synthAddress) = checkPoolRegistration();

    require(
      address(_pegToken) == synthAddress &&
        address(_collateralToken) == collateralAddress,
      'Pool mismatch with collateral and synth'
    );
  }

  /** @notice - Mints fixed rate synths against the deposited peg synth (jEUR)
   */
  function mintFromPegSynth(uint256 _pegTokenAmount, address recipient)
    public
    isActive()
    returns (uint256 numTokensMinted)
  {
    synth.safeTransferFrom(msg.sender, address(this), _pegTokenAmount);
    numTokensMinted = super.wrap(_pegTokenAmount, recipient);

    emit Mint(msg.sender, address(synth), address(this), numTokensMinted);
  }

  /** @notice - Burns fixed rate synths and unlocks the deposited peg synth (jEUR)
   */
  function redeemToPegSynth(uint256 _fixedSynthAmount, address recipient)
    public
    returns (uint256 tokensRedeemed)
  {
    tokensRedeemed = super.unwrap(_fixedSynthAmount, recipient);
    emit Redeem(msg.sender, address(this), address(synth), tokensRedeemed);
  }

  /** @notice - Mints fixed rate synths from USDC.
        Mints _pegToken from USDC using the appropriate synthereum pool.
     */
  function mintFromUSDC(
    ISynthereumPoolOnChainPriceFeed.MintParams memory _mintParams
  ) public isActive() {
    // pull USDC from user's wallet
    collateralInstance.safeTransferFrom(
      msg.sender,
      address(this),
      _mintParams.collateralAmount
    );

    // approves the pool to transfer collateral from this contract
    collateralInstance.safeIncreaseAllowance(
      address(synthereumPool),
      _mintParams.collateralAmount
    );

    // mint jEUR (peg token) with USDC and deposit directly into this contract
    _mintParams.recipient = address(this);
    (uint256 pegTokensMinted, ) = synthereumPool.mint(_mintParams);

    // mint fixedRate to user wallet
    uint256 numTokensMinted = super.wrap(pegTokensMinted, msg.sender);

    emit Mint(msg.sender, address(synth), address(this), numTokensMinted);
  }

  /** @notice - Redeem USDC by burning peg synth (from synthereum pool)
        Unlocked by burning fixed rate synths (unwrap).
    */
  function redeemUSDC(
    ISynthereumPoolOnChainPriceFeed.RedeemParams memory _redeemParams
  ) public {
    // burn _synthAmount to get peg tokens jEur into this wallet
    uint256 pegTokensUnlocked =
      super.unwrap(_redeemParams.numTokens, address(this));

    // approves the synthereum pool to pull peg tokens tokens from this contract
    synth.safeIncreaseAllowance(address(synthereumPool), pegTokensUnlocked);

    // redeem USDC by burning jEur in broker contract and send them recipient in redeemParams
    _redeemParams.numTokens = pegTokensUnlocked;
    (uint256 collateralRedeemed, ) = synthereumPool.redeem(_redeemParams);

    emit Redeem(
      msg.sender,
      address(synth),
      address(collateralInstance),
      collateralRedeemed
    );
  }

  /**
    @notice Mints fixed rate currency from a synthereum synthetic asset 
   */
  function mintFromSynth(
    IERC20 inputSynthAddress,
    ISynthereumPoolOnChainPriceFeed inputSynthPool,
    ISynthereumPoolOnChainPriceFeed.ExchangeParams memory _exchangeParams
  ) public isActive {
    // pull synth to be exchanged from user wallet into this contract wallet
    inputSynthAddress.safeTransferFrom(
      msg.sender,
      address(this),
      _exchangeParams.numTokens
    );

    // allow the synthereum pool to transfer input synth
    inputSynthAddress.safeIncreaseAllowance(
      address(inputSynthPool),
      _exchangeParams.numTokens
    );

    // synth -> peg Token into this wallet
    _exchangeParams.recipient = address(this);
    (uint256 pegTokenAmount, ) = inputSynthPool.exchange(_exchangeParams);

    // mint fixedRate token according to rate into user wallet
    uint256 numTokensMinted = super.wrap(pegTokenAmount, msg.sender);

    emit SwapWithSynth(
      msg.sender,
      address(inputSynthAddress),
      address(this),
      numTokensMinted,
      'buy'
    );
  }

  /**
    @notice Burns fixed rate currency and swap the peg synth with any other synthereum asset 
   */
  function swapForSynth(
    uint256 _fixedSynthAmount,
    ISynthereumPoolOnChainPriceFeed.ExchangeParams memory _exchangeParams
  ) public {
    // burn _synthAmount to get peg tokens jEur into this wallet
    uint256 pegTokensUnlocked = super.unwrap(_fixedSynthAmount, address(this));

    // allow the synthereum pool to transfer jEur
    synth.safeIncreaseAllowance(address(synthereumPool), pegTokensUnlocked);

    // exchange function in broker to get final asset into user wallet
    _exchangeParams.numTokens = pegTokensUnlocked;
    (uint256 numTokensMinted, ) = synthereumPool.exchange(_exchangeParams);
    emit SwapWithSynth(
      msg.sender,
      address(_exchangeParams.destPool.syntheticToken()),
      address(this),
      numTokensMinted,
      'sell'
    );
  }

  /**
    @notice Leverages the OCLR to do ERC20 -> USDC -> jEUR -> fixedSynth 
   */
  function mintFromERC20(
    uint256 amountTokensIn,
    uint256 collateralAmountOutMin,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed.MintParams memory mintParams
  ) public isActive {
    // deposit erc20 into this contract
    IERC20(tokenSwapPath[0]).safeTransferFrom(
      msg.sender,
      address(this),
      amountTokensIn
    );

    // allowance
    IERC20(tokenSwapPath[0]).safeIncreaseAllowance(
      address(atomicSwap),
      amountTokensIn
    );

    //erc20 -> USDC -> jEur to this wallet
    mintParams.recipient = address(this);
    (, , uint256 synthMinted) =
      atomicSwap.swapExactTokensAndMint(
        amountTokensIn,
        collateralAmountOutMin,
        tokenSwapPath,
        synthereumPool,
        mintParams
      );

    // mint FixedRate to user wallet
    uint256 numTokensMinted = super.wrap(synthMinted, msg.sender);

    emit SwapWithERC20(
      msg.sender,
      tokenSwapPath[0],
      address(synth),
      'buy',
      amountTokensIn,
      numTokensMinted
    );
  }

  /**
    @notice Leverages the OCLR to do ETH -> USDC -> jEUR -> fixedSynth 
   */
  function mintFromETH(
    uint256 collateralAmountOutMin,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed.MintParams memory mintParams
  ) public payable isActive {
    // ETH -> USDC -> jEUR into this wallet
    mintParams.recipient = address(this);
    (, , uint256 pegSynthMinted) =
      atomicSwap.swapExactETHAndMint{value: msg.value}(
        collateralAmountOutMin,
        tokenSwapPath,
        synthereumPool,
        mintParams
      );

    // mint fixedRate into this wallet
    uint256 numTokensMinted = super.wrap(pegSynthMinted, msg.sender);

    emit SwapWithETH(msg.sender, 'buy', msg.value, numTokensMinted);
  }

  /**
    @notice Leverages the OCLR to do fixedSynth -> jEur (peg) -> USDC -> ERC20 
   */
  function swapToERC20(
    uint256 fixedSynthAmountIn,
    uint256 amountTokenOutMin,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed.RedeemParams memory redeemParams
  ) public {
    // jBGN -> jEUR into this waallet
    uint256 pegSynthRedeemed = super.unwrap(fixedSynthAmountIn, address(this));

    // allow AtomicSwap to pull jEUR
    synth.safeIncreaseAllowance(address(atomicSwap), pegSynthRedeemed);

    // jEUr -> USDC -> ERC20 through AtomicSwap contract
    redeemParams.numTokens = pegSynthRedeemed;
    (, , uint256 outputAmount) =
      atomicSwap.redeemAndSwapExactTokens(
        amountTokenOutMin,
        tokenSwapPath,
        synthereumPool,
        redeemParams,
        msg.sender
      );

    emit SwapWithERC20(
      msg.sender,
      address(tokenSwapPath[1]),
      address(synth),
      'sell',
      fixedSynthAmountIn,
      outputAmount
    );
  }

  /**
    @notice Leverages the OCLR to do fixedSynth -> jEur (peg) -> USDC -> ETH 
   */
  function swapToETH(
    uint256 fixedSynthAmountIn,
    uint256 amountTokenOutMin,
    address[] calldata tokenSwapPath,
    ISynthereumPoolOnChainPriceFeed.RedeemParams memory redeemParams
  ) public {
    // jBGN -> jEUR into this wallet
    uint256 pegSynthRedeemed = super.unwrap(fixedSynthAmountIn, address(this));

    // allow AtomicSwap to pull jEUR
    synth.safeIncreaseAllowance(address(atomicSwap), pegSynthRedeemed);

    // jEUr -> USDC -> ERC20 through AtomicSwap contract
    redeemParams.numTokens = pegSynthRedeemed;
    (, , uint256 outputAmount) =
      atomicSwap.redeemAndSwapExactTokensForETH(
        amountTokenOutMin,
        tokenSwapPath,
        synthereumPool,
        redeemParams,
        msg.sender
      );

    emit SwapWithETH(msg.sender, 'sell', fixedSynthAmountIn, outputAmount);
  }

  // only synthereum manager can pause new mintings
  function pauseContract() public onlyAdmin {
    paused = true;
    emit ContractPaused();
  }

  function resumeContract() public onlyAdmin {
    paused = false;
    emit ContractResumed();
  }

  function changeRate(uint256 newRate) public onlyAdmin {
    emit RateChange(rate, newRate);
    rate = newRate;
  }

  function getRate() public view returns (uint256) {
    return rate;
  }

  function checkPoolRegistration()
    internal
    view
    returns (address collateralAddress, address synthAddress)
  {
    ISynthereumRegistry poolRegistry =
      ISynthereumRegistry(
        synthereumFinder.getImplementationAddress(
          SynthereumInterfaces.PoolRegistry
        )
      );

    string memory synthTokenSymbol = synthereumPool.syntheticTokenSymbol();
    collateralAddress = address(synthereumPool.collateralToken());
    uint8 version = synthereumPool.version();
    require(
      poolRegistry.isDeployed(
        synthTokenSymbol,
        IERC20(collateralAddress),
        version,
        address(synthereumPool)
      ),
      'Pool not registred'
    );

    synthAddress = address(synthereumPool.syntheticToken());
  }
}

Contract Security Audit

Contract ABI

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IDerivative","name":"destDerivative","type":"address"},{"internalType":"uint256","name":"numTokens","type":"uint256"},{"internalType":"uint256","name":"minDestNumTokens","type":"uint256"},{"internalType":"uint256","name":"feePercentage","type":"uint256"},{"internalType":"uint256","name":"expiration","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"internalType":"struct ISynthereumPoolOnChainPriceFeed.ExchangeParams","name":"_exchangeParams","type":"tuple"}],"name":"swapForSynth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"fixedSynthAmountIn","type":"uint256"},{"internalType":"uint256","name":"amountTokenOutMin","type":"uint256"},{"internalType":"address[]","name":"tokenSwapPath","type":"address[]"},{"components":[{"internalType":"contract IDerivative","name":"derivative","type":"address"},{"internalType":"uint256","name":"numTokens","type":"uint256"},{"internalType":"uint256","name":"minCollateral","type":"uint256"},{"internalType":"uint256","name":"feePercentage","type":"uint256"},{"internalType":"uint256","name":"expiration","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"internalType":"struct ISynthereumPoolOnChainPriceFeed.RedeemParams","name":"redeemParams","type":"tuple"}],"name":"swapToERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"fixedSynthAmountIn","type":"uint256"},{"internalType":"uint256","name":"amountTokenOutMin","type":"uint256"},{"internalType":"address[]","name":"tokenSwapPath","type":"address[]"},{"components":[{"internalType":"contract IDerivative","name":"derivative","type":"address"},{"internalType":"uint256","name":"numTokens","type":"uint256"},{"internalType":"uint256","name":"minCollateral","type":"uint256"},{"internalType":"uint256","name":"feePercentage","type":"uint256"},{"internalType":"uint256","name":"expiration","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"internalType":"struct ISynthereumPoolOnChainPriceFeed.RedeemParams","name":"redeemParams","type":"tuple"}],"name":"swapToETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"synth","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"synthereumFinder","outputs":[{"internalType":"contract ISynthereumFinder","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"synthereumPool","outputs":[{"internalType":"contract ISynthereumPoolOnChainPriceFeed","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"total_deposited","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

ipfs://ac869873852db878ca135a35d67fd105c43b76661cf7851a77f8dfb0c883fe28
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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