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// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.5;

import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import "./base/RegistryManager.sol";
import "../interfaces/IRegistry.sol";

/**
    Error codes:
    - T1 = ERROR_TOKEN_SPENDER_NOT_WHITELISTED
 */

/// @title Opium.TokenSpender contract holds users ERC20 allowances and allows whitelisted contracts to use ERC20 tokens
contract TokenSpender is RegistryManager {
    using SafeERC20Upgradeable for IERC20Upgradeable;

    modifier onlyCoreSpenders() {
        require(registry.isCoreSpenderWhitelisted(msg.sender), "T1");
        _;
    }

    /// @notice it is called only once upon deployment of the contract
    /// @param _registry sets the address of the Opium.Registry
    function initialize(address _registry) external initializer {
        __RegistryManager__init(_registry);
    }

    /// @notice Using this function whitelisted contracts could call ERC20 transfers
    /// @param _token IERC20 Instance of token
    /// @param _from address Address from which tokens are transferred
    /// @param _to address Address of tokens receiver
    /// @param _amount uint256 Amount of tokens to be transferred
    function claimTokens(
        IERC20Upgradeable _token,
        address _from,
        address _to,
        uint256 _amount
    ) external onlyCoreSpenders {
        _token.safeTransferFrom(_from, _to, _amount);
    }

    // Reserved storage space to allow for layout changes in the future.
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../../../utils/AddressUpgradeable.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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'
        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(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(IERC20Upgradeable 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
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.5;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "../../interfaces/IRegistry.sol";

/**
    Error codes:
    - M1 = ERROR_REGISTRY_MANAGER_ONLY_REGISTRY_MANAGER_ROLE
    - M2 = ERROR_REGISTRY_MANAGER_ONLY_CORE_CONFIGURATION_UPDATER_ROLE
 */
contract RegistryManager is Initializable {
    event LogRegistryChanged(address indexed _changer, address indexed _newRegistryAddress);

    IRegistry internal registry;

    modifier onlyRegistryManager() {
        require(registry.isRegistryManager(msg.sender), "M1");
        _;
    }

    modifier onlyCoreConfigurationUpdater() {
        require(registry.isCoreConfigurationUpdater(msg.sender), "M2");
        _;
    }

    function __RegistryManager__init(address _registry) internal initializer {
        require(_registry != address(0));
        registry = IRegistry(_registry);
        emit LogRegistryChanged(msg.sender, _registry);
    }

    function setRegistry(address _registry) external onlyRegistryManager {
        registry = IRegistry(_registry);
        emit LogRegistryChanged(msg.sender, _registry);
    }

    function getRegistry() external view returns (address) {
        return address(registry);
    }

    // Reserved storage space to allow for layout changes in the future.
    uint256[50] private __gap;
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.5;
import "../core/registry/RegistryEntities.sol";

interface IRegistry {
    function initialize(address _governor) external;

    function setProtocolAddresses(
        address _opiumProxyFactory,
        address _core,
        address _oracleAggregator,
        address _syntheticAggregator,
        address _tokenSpender
    ) external;

    function setNoDataCancellationPeriod(uint32 _noDataCancellationPeriod) external;

    function addToWhitelist(address _whitelisted) external;

    function removeFromWhitelist(address _whitelisted) external;

    function setProtocolExecutionReserveClaimer(address _protocolExecutionReserveClaimer) external;

    function setProtocolRedemptionReserveClaimer(address _protocolRedemptionReserveClaimer) external;

    function setProtocolExecutionReservePart(uint32 _protocolExecutionReservePart) external;

    function setDerivativeAuthorExecutionFeeCap(uint32 _derivativeAuthorExecutionFeeCap) external;

    function setProtocolRedemptionReservePart(uint32 _protocolRedemptionReservePart) external;

    function setDerivativeAuthorRedemptionReservePart(uint32 _derivativeAuthorRedemptionReservePart) external;

    function pause() external;

    function pauseProtocolPositionCreation() external;

    function pauseProtocolPositionMinting() external;

    function pauseProtocolPositionRedemption() external;

    function pauseProtocolPositionExecution() external;

    function pauseProtocolPositionCancellation() external;

    function pauseProtocolReserveClaim() external;

    function unpause() external;

    function getProtocolParameters() external view returns (RegistryEntities.ProtocolParametersArgs memory);

    function getProtocolAddresses() external view returns (RegistryEntities.ProtocolAddressesArgs memory);

    function isRegistryManager(address _address) external view returns (bool);

    function isCoreConfigurationUpdater(address _address) external view returns (bool);

    function getCore() external view returns (address);

    function isCoreSpenderWhitelisted(address _address) external view returns (bool);

    function isProtocolPaused() external view returns (bool);

    function isProtocolPositionCreationPaused() external view returns (bool);

    function isProtocolPositionMintingPaused() external view returns (bool);

    function isProtocolPositionRedemptionPaused() external view returns (bool);

    function isProtocolPositionExecutionPaused() external view returns (bool);

    function isProtocolPositionCancellationPaused() external view returns (bool);

    function isProtocolReserveClaimPaused() external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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;
        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");

        (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");

        (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");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)

pragma solidity ^0.8.0;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} modifier, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.5;

library RegistryEntities {
    struct ProtocolParametersArgs {
        // Period of time after which ticker could be canceled if no data was provided to the `oracleId`
        uint32 noDataCancellationPeriod;
        // Max fee that derivative author can set
        // it works as an upper bound for when the derivative authors set their synthetic's fee
        uint32 derivativeAuthorExecutionFeeCap;
        // Fixed part (percentage) that the derivative author receives for each redemption of market neutral positions
        // It is not set by the derivative authors themselves
        uint32 derivativeAuthorRedemptionReservePart;
        // Represents which part of derivative author reserves originated from derivative executions go to the protocol reserves
        uint32 protocolExecutionReservePart;
        // Represents which part of derivative author reserves originated from redemption of market neutral positions go to the protocol reserves
        uint32 protocolRedemptionReservePart;
        /// Initially uninitialized variables to allow some flexibility in case of future changes and upgradeability
        uint32 __gapOne;
        uint32 __gapTwo;
        uint32 __gapThree;
    }

    struct ProtocolAddressesArgs {
        // Address of Opium.Core contract
        address core;
        // Address of Opium.OpiumProxyFactory contract
        address opiumProxyFactory;
        // Address of Opium.OracleAggregator contract
        address oracleAggregator;
        // Address of Opium.SyntheticAggregator contract
        address syntheticAggregator;
        // Address of Opium.TokenSpender contract
        address tokenSpender;
        // Address of the recipient of execution protocol reserves
        address protocolExecutionReserveClaimer;
        // Address of the recipient of redemption protocol reserves
        address protocolRedemptionReserveClaimer;
        /// Initially uninitialized variables to allow some flexibility in case of future changes and upgradeability
        uint32 __gapOne;
        uint32 __gapTwo;
    }

    struct ProtocolPausabilityArgs {
        // if true, all the protocol's entry-points are paused
        bool protocolGlobal;
        // if true, no new positions can be created
        bool protocolPositionCreation;
        // if true, no new positions can be minted
        bool protocolPositionMinting;
        // if true, no new positions can be redeemed
        bool protocolPositionRedemption;
        // if true, no new positions can be executed
        bool protocolPositionExecution;
        // if true, no new positions can be cancelled
        bool protocolPositionCancellation;
        // if true, no reserves can be claimed
        bool protocolReserveClaim;
        /// Initially uninitialized variables to allow some flexibility in case of future changes and upgradeability
        bool __gapOne;
        bool __gapTwo;
        bool __gapThree;
        bool __gapFour;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 800
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_changer","type":"address"},{"indexed":true,"internalType":"address","name":"_newRegistryAddress","type":"address"}],"name":"LogRegistryChanged","type":"event"},{"inputs":[{"internalType":"contract IERC20Upgradeable","name":"_token","type":"address"},{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"claimTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getRegistry","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_registry","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_registry","type":"address"}],"name":"setRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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