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•  contract Owned
•    - function nominateNewOwner(address _ow ...
•    - function acceptOwnership()
•  contract SystemStatus is Owned *
•    - function requireSystemActive()
•    - function requireIssuanceActive()
•    - function requireExchangeActive()
•    - function requireSynthActive(bytes32 c ...
•    - function requireSynthsActive(bytes32 ...
•    - function isSystemUpgrading()
•    - function getSynthSuspensions(bytes32[ ...
•    - function updateAccessControl(bytes32 ...
•    - function suspendSystem(uint256 reason ...
•    - function resumeSystem()
•    - function suspendIssuance(uint256 reas ...
•    - function resumeIssuance()
•    - function suspendExchange(uint256 reas ...
•    - function resumeExchange()
•    - function suspendSynth(bytes32 currenc ...
•    - function resumeSynth(bytes32 currency ...
•    - function _requireAccessToSuspend(byte ...
•    - function _requireAccessToResume(bytes ...
•    - function _internalRequireSystemActive ...
•    - function _internalUpdateAccessControl ...

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/**
 *Submitted for verification at Etherscan.io on 2020-03-31
*/

/*
   ____            __   __        __   _
  / __/__ __ ___  / /_ / /  ___  / /_ (_)__ __
 _\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
     /___/

* Synthetix: SystemStatus.sol
*
* Latest source (may be newer): https://github.com/Synthetixio/synthetix/blob/master/contracts/SystemStatus.sol
* Docs: https://docs.synthetix.io/contracts/SystemStatus
*
* Contract Dependencies: 
*	- Owned
* Libraries: (none)
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/

/* ===============================================
* Flattened with Solidifier by Coinage
* 
* https://solidifier.coina.ge
* ===============================================
*/


pragma solidity 0.4.25;


// https://docs.synthetix.io/contracts/Owned
contract Owned {
    address public owner;
    address public nominatedOwner;

    /**
     * @dev Owned Constructor
     */
    constructor(address _owner) public {
        require(_owner != address(0), "Owner address cannot be 0");
        owner = _owner;
        emit OwnerChanged(address(0), _owner);
    }

    /**
     * @notice Nominate a new owner of this contract.
     * @dev Only the current owner may nominate a new owner.
     */
    function nominateNewOwner(address _owner) external onlyOwner {
        nominatedOwner = _owner;
        emit OwnerNominated(_owner);
    }

    /**
     * @notice Accept the nomination to be owner.
     */
    function acceptOwnership() external {
        require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership");
        emit OwnerChanged(owner, nominatedOwner);
        owner = nominatedOwner;
        nominatedOwner = address(0);
    }

    modifier onlyOwner {
        require(msg.sender == owner, "Only the contract owner may perform this action");
        _;
    }

    event OwnerNominated(address newOwner);
    event OwnerChanged(address oldOwner, address newOwner);
}


// https://docs.synthetix.io/contracts/SystemStatus
contract SystemStatus is Owned {
    struct Status {
        bool canSuspend;
        bool canResume;
    }

    mapping(bytes32 => mapping(address => Status)) public accessControl;

    struct Suspension {
        bool suspended;
        // reason is an integer code,
        // 0 => no reason, 1 => upgrading, 2+ => defined by system usage
        uint248 reason;
    }

    uint248 public constant SUSPENSION_REASON_UPGRADE = 1;

    bytes32 public constant SECTION_SYSTEM = "System";
    bytes32 public constant SECTION_ISSUANCE = "Issuance";
    bytes32 public constant SECTION_EXCHANGE = "Exchange";
    bytes32 public constant SECTION_SYNTH = "Synth";

    Suspension public systemSuspension;

    Suspension public issuanceSuspension;

    Suspension public exchangeSuspension;

    mapping(bytes32 => Suspension) public synthSuspension;

    constructor(address _owner) public Owned(_owner) {
        _internalUpdateAccessControl(SECTION_SYSTEM, _owner, true, true);
        _internalUpdateAccessControl(SECTION_ISSUANCE, _owner, true, true);
        _internalUpdateAccessControl(SECTION_EXCHANGE, _owner, true, true);
        _internalUpdateAccessControl(SECTION_SYNTH, _owner, true, true);
    }

    /* ========== VIEWS ========== */
    function requireSystemActive() external view {
        _internalRequireSystemActive();
    }

    function requireIssuanceActive() external view {
        // Issuance requires the system be active
        _internalRequireSystemActive();
        require(!issuanceSuspension.suspended, "Issuance is suspended. Operation prohibited");
    }

    function requireExchangeActive() external view {
        // Issuance requires the system be active
        _internalRequireSystemActive();
        require(!exchangeSuspension.suspended, "Exchange is suspended. Operation prohibited");
    }

    function requireSynthActive(bytes32 currencyKey) external view {
        // Synth exchange and transfer requires the system be active
        _internalRequireSystemActive();
        require(!synthSuspension[currencyKey].suspended, "Synth is suspended. Operation prohibited");
    }

    function requireSynthsActive(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view {
        // Synth exchange and transfer requires the system be active
        _internalRequireSystemActive();

        require(
            !synthSuspension[sourceCurrencyKey].suspended && !synthSuspension[destinationCurrencyKey].suspended,
            "One or more synths are suspended. Operation prohibited"
        );
    }

    function isSystemUpgrading() external view returns (bool) {
        return systemSuspension.suspended && systemSuspension.reason == SUSPENSION_REASON_UPGRADE;
    }

    function getSynthSuspensions(bytes32[] synths)
        external
        view
        returns (bool[] memory suspensions, uint256[] memory reasons)
    {
        suspensions = new bool[](synths.length);
        reasons = new uint256[](synths.length);

        for (uint i = 0; i < synths.length; i++) {
            suspensions[i] = synthSuspension[synths[i]].suspended;
            reasons[i] = synthSuspension[synths[i]].reason;
        }
    }

    /* ========== MUTATIVE FUNCTIONS ========== */
    function updateAccessControl(bytes32 section, address account, bool canSuspend, bool canResume) external onlyOwner {
        _internalUpdateAccessControl(section, account, canSuspend, canResume);
    }

    function suspendSystem(uint256 reason) external {
        _requireAccessToSuspend(SECTION_SYSTEM);
        systemSuspension.suspended = true;
        systemSuspension.reason = uint248(reason);
        emit SystemSuspended(systemSuspension.reason);
    }

    function resumeSystem() external {
        _requireAccessToResume(SECTION_SYSTEM);
        systemSuspension.suspended = false;
        emit SystemResumed(uint256(systemSuspension.reason));
        systemSuspension.reason = 0;
    }

    function suspendIssuance(uint256 reason) external {
        _requireAccessToSuspend(SECTION_ISSUANCE);
        issuanceSuspension.suspended = true;
        issuanceSuspension.reason = uint248(reason);
        emit IssuanceSuspended(reason);
    }

    function resumeIssuance() external {
        _requireAccessToResume(SECTION_ISSUANCE);
        issuanceSuspension.suspended = false;
        emit IssuanceResumed(uint256(issuanceSuspension.reason));
        issuanceSuspension.reason = 0;
    }

    function suspendExchange(uint256 reason) external {
        _requireAccessToSuspend(SECTION_EXCHANGE);
        exchangeSuspension.suspended = true;
        exchangeSuspension.reason = uint248(reason);
        emit ExchangeSuspended(reason);
    }

    function resumeExchange() external {
        _requireAccessToResume(SECTION_EXCHANGE);
        exchangeSuspension.suspended = false;
        emit ExchangeResumed(uint256(exchangeSuspension.reason));
        exchangeSuspension.reason = 0;
    }

    function suspendSynth(bytes32 currencyKey, uint256 reason) external {
        _requireAccessToSuspend(SECTION_SYNTH);
        synthSuspension[currencyKey].suspended = true;
        synthSuspension[currencyKey].reason = uint248(reason);
        emit SynthSuspended(currencyKey, reason);
    }

    function resumeSynth(bytes32 currencyKey) external {
        _requireAccessToResume(SECTION_SYNTH);
        emit SynthResumed(currencyKey, uint256(synthSuspension[currencyKey].reason));
        delete synthSuspension[currencyKey];
    }

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

    function _requireAccessToSuspend(bytes32 section) internal view {
        require(accessControl[section][msg.sender].canSuspend, "Restricted to access control list");
    }

    function _requireAccessToResume(bytes32 section) internal view {
        require(accessControl[section][msg.sender].canResume, "Restricted to access control list");
    }

    function _internalRequireSystemActive() internal view {
        require(
            !systemSuspension.suspended,
            systemSuspension.reason == SUSPENSION_REASON_UPGRADE
                ? "Synthetix is suspended, upgrade in progress... please stand by"
                : "Synthetix is suspended. Operation prohibited"
        );
    }

    function _internalUpdateAccessControl(bytes32 section, address account, bool canSuspend, bool canResume) internal {
        require(
            section == SECTION_SYSTEM ||
                section == SECTION_ISSUANCE ||
                section == SECTION_EXCHANGE ||
                section == SECTION_SYNTH,
            "Invalid section supplied"
        );
        accessControl[section][account].canSuspend = canSuspend;
        accessControl[section][account].canResume = canResume;
        emit AccessControlUpdated(section, account, canSuspend, canResume);
    }

    /* ========== EVENTS ========== */

    event SystemSuspended(uint256 reason);
    event SystemResumed(uint256 reason);

    event IssuanceSuspended(uint256 reason);
    event IssuanceResumed(uint256 reason);

    event ExchangeSuspended(uint256 reason);
    event ExchangeResumed(uint256 reason);

    event SynthSuspended(bytes32 currencyKey, uint256 reason);
    event SynthResumed(bytes32 currencyKey, uint256 reason);

    event AccessControlUpdated(bytes32 indexed section, address indexed account, bool canSuspend, bool canResume);
}

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000000000000000000000000de910777c787903f78c89e7a0bf7f4c435cbb1fe

-----Decoded View---------------
Arg [0] : _owner (address): 0xDe910777C787903F78C89e7a0bf7F4C435cBB1Fe

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000de910777c787903f78c89e7a0bf7f4c435cbb1fe

SafeDecimalMath : 0x84d626b2bb4d0f064067e4bf80fce7055d8f3e7b