Contract 0x5d22045DAcEAB03B158031eCB7D9d06Fad24609b

 

Contract Overview

DeversiFi 2
Balance:
1,863.78702386 Ether

EtherValue:
$2,755,497.29 (@ $1,478.44/ETH)

Token:
Txn Hash
Block
From
To
Value
0x373121b01d755c25108903ff60474e096a805d2ec46140552ec85180c01765eb(pending)2021-03-04 23:26:547 hrs 19 mins ago0x7207e6f6ae185c0f3eabdcea16850ec489256e80 IN DeversiFi 23 Ether(Pending)(Pending)
0x642c24b45c0ca5c5fa814b964a6e65cd77f3a82b751827fb9b951df756e22dc6119759122021-03-05 3:42:173 hrs 3 mins agoDeversiFi IN  DeversiFi 20 Ether0.01044297216130.56
0x52b67379b3b3289f3cadbad4330d35d80b0dae695948780bfc5d36af2a79612b119751772021-03-05 0:59:365 hrs 46 mins ago0xee5a10c737f6098011ab9d7377938b3f312d8da8 IN  DeversiFi 20 Ether0.0163407417158.1
0x446d73bc5701d689db3f6ceaab346c1a0b18b98acca4109019b4d77594f87c84119751702021-03-05 0:58:105 hrs 47 mins ago0xee5a10c737f6098011ab9d7377938b3f312d8da8 IN  DeversiFi 20 Ether0.0113887335158.1
0xf25c1353dba1a3e0b62663a9c4fdfc7d98eecd6cb6be0854eb51789c891dd1ff119745552021-03-04 22:39:368 hrs 6 mins ago0x677f2672c7958a635fc62acb52f8bba54cafea6f IN  DeversiFi 20 Ether0.0073834575
0xaa8edeaf04aeab97f9ad0250a6eba5786c05c2e55f0a02dadcdd7303cd8a8aa8119745142021-03-04 22:29:528 hrs 16 mins ago0x677f2672c7958a635fc62acb52f8bba54cafea6f IN  DeversiFi 20 Ether0.00540172575
0xa0743ade4217b9197620c8cc8aaf1ca2354306d531bad03d39c66506fb6fbc8f119743192021-03-04 21:52:278 hrs 53 mins agoDeversiFi IN  DeversiFi 20 Ether0.01075431492113.22
0xb44f3ea44e1cb63195199e7f9bfb91e033a2af873529065f029460d5ede7fcfd119735272021-03-04 18:57:1011 hrs 48 mins ago0x9a3f66c46653811a826d24da1f5dced08a8f657a IN  DeversiFi 20 Ether0.013954815135
0xb9fb7f4337c51cceb93d33bb16a22f30fcbc493e9d9ed8aed1af5e7d58a2ba0f119735102021-03-04 18:52:5511 hrs 53 mins ago0x9a3f66c46653811a826d24da1f5dced08a8f657a IN  DeversiFi 20 Ether0.010587381147
0x699912488ffa2dc425fc79990fc7640b4a18ecb5527116e8dd7502979f6f5924119733672021-03-04 18:18:5512 hrs 27 mins ago0x372140e9705d6b6f1cf76c28d103637b01e804d9 IN  DeversiFi 20 Ether0.01161946118
0x3c01e7f7eae26ba636c461754e07bde6699f159ce509b80a75ef4be9ac14c37a119730372021-03-04 17:02:4013 hrs 43 mins ago0x74fb529036cb96654e3cf4c18096e7189ac63b3b IN  DeversiFi 21.1161 Ether0.0089154324128.52
0x43c119ade7ec4b71a2669d76021b60a37e2dcd965e750133c8a17ce99da757df119730022021-03-04 16:53:5013 hrs 52 mins ago0x74fb529036cb96654e3cf4c18096e7189ac63b3b IN  DeversiFi 20 Ether0.007850507109
0xc843663a312e6f9ebfdc11c684706f28cf0fb8dc06aac3ae9e9b4f06bbae948f119728582021-03-04 16:21:2614 hrs 24 mins ago0xca8252afdf0dc2a94eadef82536bb53c0be7716a IN  DeversiFi 20.01 Ether0.0069358100
0xcbd2bbc75903fc82a9bd7dd3d3a1fa15f082cdbaf152ef0f67ed07f0738301fc119728462021-03-04 16:18:2614 hrs 27 mins ago0xca8252afdf0dc2a94eadef82536bb53c0be7716a IN  DeversiFi 20 Ether0.00999103056138.72
0x3fdeca1c7a14882436d3e8f4fb027a7f9780f17363a028bc230c2831d8e09c70119727992021-03-04 16:07:5114 hrs 38 mins ago0x8cded15560f390cdbecf835c581782d4ad9c8245 IN  DeversiFi 20 Ether0.009795128136
0x0e199a147ff5b208d710091f6c44a1e3865b325f2627fa6ad5f4976f6967951d119727132021-03-04 15:53:2814 hrs 52 mins ago0xa013984fa32d56bda1b3fe4c1804e65037522f49 IN  DeversiFi 20 Ether0.003789641788.74
0x0763b5a41486d385e3f54cf6c72c7fb15af4dbc79cd75b32944d6743e8ef79e3119727132021-03-04 15:53:2814 hrs 52 mins ago0xa013984fa32d56bda1b3fe4c1804e65037522f49 IN  DeversiFi 20 Ether0.003425807788.74
0x4aba3c9cdea29f3e170534901a2b2bffa80ac35bb03b7fd29584ccf53f99d3fd119722632021-03-04 14:12:0516 hrs 33 mins ago0xb74ba6ae0c780c4665e6652cb9b088d584d8be4c IN  DeversiFi 20 Ether0.00927792127.5
0x0c3416c9f1230b9c8e2746af53a11444848f40c7e13b8c89ca132509036bf52e119722122021-03-04 13:59:4916 hrs 46 mins ago0x8a6c80aab6497e2db35817817b593b79d78f6ae5 IN  DeversiFi 20 Ether0.01112339883.6
0x3f31132fda2b4fe58f2071b53ddd4a3c9f89e2f72201e37d1d4a0006099d0992119706782021-03-04 8:18:2822 hrs 27 mins ago0xde7fea21fe516d824641ae65f97b60552568e30a IN  DeversiFi 20 Ether0.013770918107.1
0xab311fdfc493f48c596e670c24b6de7e47838f14148a8f3d06fb53e71b465541119706762021-03-04 8:18:0222 hrs 27 mins ago0xde7fea21fe516d824641ae65f97b60552568e30a IN  DeversiFi 20 Ether0.0079379307107.1
0xa7d78438a780c3300520e167c851272d1b215b9440d8bfcbb1d492529426e10f119706752021-03-04 8:17:5422 hrs 28 mins ago0xde7fea21fe516d824641ae65f97b60552568e30a IN  DeversiFi 20 Ether0.0082902897107.1
0x2265107817405e15603fd4838924bb2984b5541026fa41dffa73567ecac56de1119706752021-03-04 8:17:5422 hrs 28 mins ago0xde7fea21fe516d824641ae65f97b60552568e30a IN  DeversiFi 20 Ether0.0076625766107.1
0x2362a29ccdecd70f61614380a71c797622f1d811559feff7f2239b4f7aedec71119706732021-03-04 8:17:3622 hrs 28 mins ago0xde7fea21fe516d824641ae65f97b60552568e30a IN  DeversiFi 20 Ether0.0259288029107.1
0xb9a63740124a80cac33025538fe4aeeaef8ee3aef944ce04ae49aa0c3520e2f5119706712021-03-04 8:17:0922 hrs 28 mins ago0xde7fea21fe516d824641ae65f97b60552568e30a IN  DeversiFi 20 Ether0.0062276508107.1
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0x0763b5a41486d385e3f54cf6c72c7fb15af4dbc79cd75b32944d6743e8ef79e3119727132021-03-04 15:53:2814 hrs 52 mins ago DeversiFi 20xa013984fa32d56bda1b3fe4c1804e65037522f492.5 Ether
0x26a74b03bbfa6f89d29058811837a8d6613b33b49e8cf9c4d180b7c6e1ca1ef4119706712021-03-04 8:17:0922 hrs 28 mins ago DeversiFi 20xde7fea21fe516d824641ae65f97b60552568e30a2.00767945 Ether
0xb045fc613a9fc10e8d9714418da60c6e6b352082bf0de4bd0a7ab5523d740110119661422021-03-03 15:31:471 day 15 hrs ago DeversiFi 20x3b0455182504a6f45c2d32d6eda19e16bb4a39da2.3992 Ether
0x5c40f2c8fa3fabedf75eba4393205a5b8b5212cf855ec8f23ec8df2f98fa1cb2119642982021-03-03 8:49:271 day 21 hrs ago DeversiFi 20x68ba6a34698ba0afed3df1b606401fc553a6ca8c1.0692481 Ether
0x0dd9d58f903774151d464a91c69370072e4db91766075f85c6a8808d3aa160e0119566562021-03-02 4:30:183 days 2 hrs ago DeversiFi 20xf0aa4d81cccf2ce457673c1b8acb2e9d403f777f0.29781 Ether
0x6015d19b533b68f485f3be287fb27f8feeb239f21ada251e92920e48f7161c5d119518942021-03-01 10:50:043 days 19 hrs ago DeversiFi 20x977bcc40cd619cd57c22767d76d129e3049da6df14.79535 Ether
0x7859be88998e341c3e6c11b9e896183d29d9fa5b7f4087952a7bc7f62e0e25d5119515752021-03-01 9:42:343 days 21 hrs ago DeversiFi 20x5995a5324dbbde36391cb553ea688826c3f8319b16.45401779 Ether
0x855e1c1ed363ffa720655b43080ba20f61aaaa554f5753d6fb96b4948ab94d72119514932021-03-01 9:22:223 days 21 hrs ago DeversiFi 20x111f33a2c69b34500e6acd4b21dd84be679bfd471 Ether
0xcd0b87bbfbb1c1fe01bc179f3168f64a9ef0f0e46c10ce6f733d8c1f0233a1b9119513932021-03-01 8:57:553 days 21 hrs ago DeversiFi 20xde07abf5663b88fbd0974ee69b3bc75971a2938110 Ether
0xb7c25fa41c124fd89188daf17647f76122f04d9b9f2c1b9f08be41d6986814bd119402652021-02-27 15:56:015 days 14 hrs ago DeversiFi 20xa9ce7b858b81efc914c881e648f3aea3f3980b121.22 Ether
0x65bbb5a3d6a676554cc7f5f16b41998eff53678ba4b885138cd6b8db38239dc3119396132021-02-27 13:27:085 days 17 hrs ago DeversiFi 20xf7700944b35c3f85a23e9d77bee065dc4f10d6f79 Ether
0x19eeb1ed7ae7efa365269c511ec5b5dc0f937ac92a235a11b5cc7c0441006d65119334572021-02-26 14:48:446 days 15 hrs ago DeversiFi 20xde07abf5663b88fbd0974ee69b3bc75971a2938120 Ether
0x31c229a8ceadb39517c51357b91e8caf85b773bb436a10e7117b8d3f530fcca3119329812021-02-26 12:54:546 days 17 hrs ago DeversiFi 20xd58308b79cb22b93f70dbd88aa5a65d1859adf9a6 Ether
0xcdcb71a31c856e717b77f839734146d807d4d2590ad75209670d4cda752f3e65119303662021-02-26 3:18:567 days 3 hrs ago DeversiFi 20x7fe9c1ea39c77297b0d994c413d649130e391d899.90234417 Ether
0xf927e4e3fe68ac554af7016f28390840895cd66e423385b7cfc309cd2e1007f2119302562021-02-26 2:54:477 days 3 hrs ago DeversiFi 20x5c70362919df07762c3f99657c0ed0ea9e8cd1590.1 Ether
0x9c76e8e14af4a6c197ce22960a42921bbbda5f75f49d326e7827f9ca7d5d9099119294172021-02-25 23:49:417 days 6 hrs ago DeversiFi 20x3b6627c4fa0e52e219608ace14b12219a6aa72b554 Ether
0x2849aaaa3341d5a055d81a8db29ec5ee06d069473e8cf8656985c1feb875f30c119293902021-02-25 23:40:407 days 7 hrs ago DeversiFi 20x2a8e1ec5ede2972986e3ef39bc44858828b54fe650 Ether
0x40be6bb6f6f217a01bf4a90c4678076fc4c5ebe8fc6443182c69165d059e3806119292372021-02-25 23:11:587 days 7 hrs ago DeversiFi 20x53d290220b4ae5cd91987517ef04e206c10788500.49925479 Ether
0xb743b96f277730d130e089d2154bdec60cb190ba19450b8d562271b60e82f5b9119286852021-02-25 21:09:517 days 9 hrs ago DeversiFi 20x09e66e933f9f16817a736ef543f424f0e4eee8220.100335 Ether
0x71891eb67e8d0ffd8064f7b45558ffa5308f4ff9038d78c903ba9a1d8169c9c8119282352021-02-25 19:32:217 days 11 hrs ago DeversiFi 20x50ebff55962413d52bfd1f782f8d3e1c50de87ca0.043029 Ether
0x445fc20d29583d33e80ae239971c4424d92c79f925624a3539f77682e24ff088119259412021-02-25 11:01:407 days 19 hrs ago DeversiFi 20x2a8e1ec5ede2972986e3ef39bc44858828b54fe6864 Ether
0x102b196a3eb076af61f00ba56caebbb31714cb499774af4fa926b7ec0ade8d0c119259292021-02-25 10:57:497 days 19 hrs ago DeversiFi 20x3b6627c4fa0e52e219608ace14b12219a6aa72b5457 Ether
0xa2dcf628ab8ab850bdee911d6412a56a8d6d94eabdf8c91ea4780e17bd5ae4ed119248902021-02-25 7:13:057 days 23 hrs ago DeversiFi 20x36c61893f2ea0dce7c98b183cbcd82875f44c44137.927 Ether
0x588202c7ca24157bedcc342d428964dd0302b197016d4eb53c373e1381f5e754119245452021-02-25 6:01:588 days 44 mins ago DeversiFi 20xd1ff792f651a0c896f37ef4c74f5b2ed24b6a8d50.1 Ether
0x375b751cfe03c8046e2d11b6386241eee917b77b9ddec867d21f8da847ed9362119213682021-02-24 18:12:418 days 12 hrs ago DeversiFi 20x1eb66a75215a0ee8c88bc99125fbe8e387419f381 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
Proxy

Compiler Version
v0.5.15+commit.6a57276f

Optimization Enabled:
Yes with 100 runs

Other Settings:
default evmVersion, Apache-2.0 license

Contract Source Code (Solidity Multiple files format)

File 5 of 7: Proxy.sol
/*
  Copyright 2019,2020 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
pragma solidity ^0.5.2;

import "ProxyGovernance.sol";
import "ProxyStorage.sol";
import "Common.sol";

/**
  The Proxy contract implements delegation of calls to other contracts (`implementations`), with
  proper forwarding of return values and revert reasons. This pattern allows retaining the contract
  storage while replacing implementation code.

  The following operations are supported by the proxy contract:

  - :sol:func:`addImplementation`: Defines a new implementation, the data with which it should be initialized and whether this will be the last version of implementation.
  - :sol:func:`upgradeTo`: Once an implementation is added, the governor may upgrade to that implementation only after a safety time period has passed (time lock), the current implementation is not the last version and the implementation is not frozen (see :sol:mod:`FullWithdrawals`).
  - :sol:func:`removeImplementation`: Any announced implementation may be removed. Removing an implementation is especially important once it has been used for an upgrade in order to avoid an additional unwanted revert to an older version.

  The only entity allowed to perform the above operations is the proxy governor
  (see :sol:mod:`ProxyGovernance`).

  Every implementation is required to have an `initialize` function that replaces the constructor
  of a normal contract. Furthermore, the only parameter of this function is an array of bytes
  (`data`) which may be decoded arbitrarily by the `initialize` function. It is up to the
  implementation to ensure that this function cannot be run more than once if so desired.

  When an implementation is added (:sol:func:`addImplementation`) the initialization `data` is also
  announced, allowing users of the contract to analyze the full effect of an upgrade to the new
  implementation. During an :sol:func:`upgradeTo`, the `data` is provided again and only if it is
  identical to the announced `data` is the upgrade performed by pointing the proxy to the new
  implementation and calling its `initialize` function with this `data`.

  It is the responsibility of the implementation not to overwrite any storage belonging to the
  proxy (`ProxyStorage`). In addition, upon upgrade, the new implementation is assumed to be
  backward compatible with previous implementations with respect to the storage used until that
  point.
*/
contract Proxy is ProxyStorage, ProxyGovernance {

    // Emitted when the active implementation is replaced.
    event Upgraded(address indexed implementation);

    // Emitted when an implementation is submitted as an upgrade candidate and a time lock
    // is activated.
    event ImplementationAdded(address indexed implementation, bytes initializer, bool finalize);

    // Emitted when an implementation is removed from the list of upgrade candidates.
    event ImplementationRemoved(address indexed implementation);

    // Emitted when the implementation is finalized.
    event FinalizedImplementation(address indexed implementation);

    // Storage slot with the address of the current implementation.
    // The address of the slot is keccak256("StarkWare2019.implemntation-slot").
    // We need to keep this variable stored outside of the commonly used space,
    // so that it's not overrun by the logical implementaiton (the proxied contract).
    bytes32 internal constant IMPLEMENTATION_SLOT =
    0x177667240aeeea7e35eabe3a35e18306f336219e1386f7710a6bf8783f761b24;

    // This storage slot stores the finalization flag.
    // Once the value stored in this slot is set to non-zero
    // the proxy blocks implementation upgrades.
    // The current implementation is then referred to as Finalized.
    // Web3.solidityKeccak(['string'], ["StarkWare2019.finalization-flag-slot"]).
    bytes32 internal constant FINALIZED_STATE_SLOT =
    0x7d433c6f837e8f93009937c466c82efbb5ba621fae36886d0cac433c5d0aa7d2;
    uint256 public constant UPGRADE_ACTIVATION_DELAY = 28 days;

    using Addresses for address;

    constructor ( )
        public
    {
        initGovernance();
    }

    /*
      Returns true if the implementation is frozen.
      If the implementation was not assigned yet, returns false.
    */
    function implementationIsFrozen() private returns (bool) {
        address _implementation = implementation();

        // We can't call low level implementation before it's assigned. (i.e. ZERO).
        if (_implementation == ZERO_ADDRESS) {
            return false;
        }
        // solium-disable-next-line security/no-low-level-calls
        (bool success, bytes memory returndata) = _implementation.delegatecall(
            abi.encodeWithSignature("isFrozen()"));
        require(success, string(returndata));
        return abi.decode(returndata, (bool));
    }

    /*
      This method blocks delegation to initialize().
      Only upgradeTo should be able to delegate call to initialize().
    */
    function initialize(bytes calldata /*data*/)
        external pure
    {
        revert("CANNOT_CALL_INITIALIZE");
    }

    modifier notFinalized()
    {
        require(isNotFinalized(), "IMPLEMENTATION_FINALIZED");
        _;
    }

    /*
      Forbids calling the function if the implementation is frozen.
      This modifier relies on the lower level (logical contract) implementation of isFrozen().
    */
    modifier notFrozen()
    {
        require(implementationIsFrozen() == false, "STATE_IS_FROZEN");
        _;
    }

    /*
      Contract's default function. Delegates execution to the implementation contract.
      It returns back to the external caller whatever the implementation delegated code returns.
    */
    function () external payable {
        address _implementation = implementation();
        require (_implementation != ZERO_ADDRESS, "MISSING_IMPLEMENTATION");

        // solium-disable-next-line security/no-inline-assembly
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize)

            // Call the implementation.
            // out and outsize are 0 for now, as we don't know the out size yet.
            let result := delegatecall(gas, _implementation, 0, calldatasize, 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize)

            switch result
            // delegatecall returns 0 on error.
            case 0 { revert(0, returndatasize) }
            default { return(0, returndatasize) }
        }
    }

    /*
      Returns the address of the current implementation.
    */
    function implementation() public view returns (address _implementation) {
        bytes32 slot = IMPLEMENTATION_SLOT;
        // solium-disable-next-line security/no-inline-assembly
        assembly {
            _implementation := sload(slot)
        }
    }

    /*
      Sets the implementation address of the proxy.
    */
    function setImplementation(address newImplementation) private {
        bytes32 slot = IMPLEMENTATION_SLOT;
        // solium-disable-next-line security/no-inline-assembly
        assembly {
            sstore(slot, newImplementation)
        }
    }

    /*
      Returns true if the contract is not in the finalized state.
    */
    function isNotFinalized() public view returns (bool notFinal) {
        bytes32 slot = FINALIZED_STATE_SLOT;
        uint256 slotValue;
        // solium-disable-next-line security/no-inline-assembly
        assembly {
            slotValue := sload(slot)
        }
        notFinal = (slotValue == 0);
    }

    /*
      Marks the current implementation as finalized.
    */
    function setFinalizedFlag() private {
        bytes32 slot = FINALIZED_STATE_SLOT;
        // solium-disable-next-line security/no-inline-assembly
        assembly {
            sstore(slot, 0x1)
        }
    }

    /*
      Introduce an implementation and its initialization vector,
      and start the time-lock before it can be upgraded to.
      addImplementation is not blocked when frozen or finalized.
      (upgradeTo API is blocked when finalized or frozen).
    */
    function addImplementation(address newImplementation, bytes calldata data, bool finalize)
        external onlyGovernance {
        require(newImplementation.isContract(), "ADDRESS_NOT_CONTRACT");

        bytes32 init_hash = keccak256(abi.encode(data, finalize));
        initializationHash[newImplementation] = init_hash;

        // solium-disable-next-line security/no-block-members
        uint256 activation_time = now + UPGRADE_ACTIVATION_DELAY;

        // First implementation should not have time-lock.
        if (implementation() == ZERO_ADDRESS) {
            // solium-disable-next-line security/no-block-members
            activation_time = now;
        }

        enabledTime[newImplementation] = activation_time;
        emit ImplementationAdded(newImplementation, data, finalize);
    }

    /*
      Removes a candidate implementation.
      Note that it is possible to remove the current implementation. Doing so doesn't affect the
      current implementation, but rather revokes it as a future candidate.
    */
    function removeImplementation(address newImplementation)
        external onlyGovernance {

        // If we have initializer, we set the hash of it.
        uint256 activation_time = enabledTime[newImplementation];

        require(activation_time > 0, "ADDRESS_NOT_UPGRADE_CANDIDATE");

        enabledTime[newImplementation] = 0;

        initializationHash[newImplementation] = 0;
        emit ImplementationRemoved(newImplementation);
    }

    /*
      Upgrades the proxy to a new implementation, with its initialization.
      to upgrade successfully, implementation must have been added time-lock agreeably
      before, and the init vector must be identical ot the one submitted before.

      Upon assignment of new implementation address,
      its initialize will be called with the inititalizing vector (even if empty).
      Therefore, the implementatin MUST must have such a method.
    */
    function upgradeTo(address newImplementation, bytes calldata data, bool finalize)
        external payable onlyGovernance notFinalized notFrozen {
        uint256 activation_time = enabledTime[newImplementation];

        require(activation_time > 0, "ADDRESS_NOT_UPGRADE_CANDIDATE");
        // solium-disable-next-line security/no-block-members
        require(activation_time <= now, "UPGRADE_NOT_ENABLED_YET");

        bytes32 init_vector_hash = initializationHash[newImplementation];
        require(init_vector_hash == keccak256(abi.encode(data, finalize)), "CHANGED_INITIALIZER");
        setImplementation(newImplementation);

        // solium-disable-next-line security/no-low-level-calls
        (bool success, bytes memory returndata) = newImplementation.delegatecall(
            abi.encodeWithSelector(this.initialize.selector, data));
        require(success, string(returndata));

        // Verify that the new implementation is not frozen post initialization.
        (success, returndata) = newImplementation.delegatecall(
            abi.encodeWithSignature("isFrozen()"));
        require(success, "CALL_TO_ISFROZEN_REVERTED");
        require(abi.decode(returndata, (bool)) == false, "NEW_IMPLEMENTATION_FROZEN");

        if (finalize == true) {
            setFinalizedFlag();
            emit FinalizedImplementation(newImplementation);
        }

        emit Upgraded(newImplementation);
    }
}

File 1 of 7: Common.sol
/*
  Copyright 2019,2020 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
pragma solidity ^0.5.2;

/*
  Common Utility libraries.
  1. Addresses (extending address).
*/
library Addresses {
    function isContract(address account) internal view returns (bool) {
        uint256 size;
        // solium-disable-next-line security/no-inline-assembly
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }
}

File 2 of 7: Governance.sol
/*
  Copyright 2019,2020 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
pragma solidity ^0.5.2;

import "GovernanceStorage.sol";
import "MGovernance.sol";

/*
  Implements Generic Governance, applicable for both proxy and main contract, and possibly others.
  Notes:
  1. This class is virtual (getGovernanceTag is not implemented).
  2. The use of the same function names by both the Proxy and a delegated implementation
     is not possible since calling the implementation functions is done via the default function
     of the Proxy. For this reason, for example, the implementation of MainContract (MainGovernance)
     exposes mainIsGovernor, which calls the internal isGovernor method.
*/
contract Governance is GovernanceStorage, MGovernance {
    event LogNominatedGovernor(address nominatedGovernor);
    event LogNewGovernorAccepted(address acceptedGovernor);
    event LogRemovedGovernor(address removedGovernor);
    event LogNominationCancelled();

    address internal constant ZERO_ADDRESS = address(0x0);

    /*
      Returns a string which uniquely identifies the type of the governance mechanism.
    */
    function getGovernanceTag()
        internal
        view
        returns (string memory);

    /*
      Returns the GovernanceInfoStruct associated with the governance tag.
    */
    function contractGovernanceInfo()
        internal
        view
        returns (GovernanceInfoStruct storage) {
        string memory tag = getGovernanceTag();
        GovernanceInfoStruct storage gub = governanceInfo[tag];
        require(gub.initialized == true, "NOT_INITIALIZED");
        return gub;
    }

    function initGovernance()
        internal
    {
        string memory tag = getGovernanceTag();
        GovernanceInfoStruct storage gub = governanceInfo[tag];
        require(gub.initialized == false, "ALREADY_INITIALIZED");
        gub.initialized = true;  // to ensure addGovernor() won't fail.
        // Add the initial governer.
        addGovernor(msg.sender);
    }

    modifier onlyGovernance()
    {
        require(isGovernor(msg.sender), "ONLY_GOVERNANCE");
        _;
    }

    function isGovernor(address testGovernor)
        internal view
        returns (bool addressIsGovernor){
        GovernanceInfoStruct storage gub = contractGovernanceInfo();
        addressIsGovernor = gub.effectiveGovernors[testGovernor];
    }

    /*
      Cancels the nomination of a governor condidate.
    */
    function cancelNomination() internal onlyGovernance() {
        GovernanceInfoStruct storage gub = contractGovernanceInfo();
        gub.candidateGovernor = ZERO_ADDRESS;
        emit LogNominationCancelled();
    }

    function nominateNewGovernor(address newGovernor) internal onlyGovernance() {
        GovernanceInfoStruct storage gub = contractGovernanceInfo();
        require(isGovernor(newGovernor) == false, "ALREADY_GOVERNOR");
        gub.candidateGovernor = newGovernor;
        emit LogNominatedGovernor(newGovernor);
    }

    /*
      The addGovernor is called in two cases:
      1. by acceptGovernance when a new governor accepts its role.
      2. by initGovernance to add the initial governor.
      The difference is that the init path skips the nominate step
      that would fail because of the onlyGovernance modifier.
    */
    function addGovernor(address newGovernor) private {
        require(isGovernor(newGovernor) == false, "ALREADY_GOVERNOR");
        GovernanceInfoStruct storage gub = contractGovernanceInfo();
        gub.effectiveGovernors[newGovernor] = true;
    }

    function acceptGovernance()
        internal
    {
        // The new governor was proposed as a candidate by the current governor.
        GovernanceInfoStruct storage gub = contractGovernanceInfo();
        require(msg.sender == gub.candidateGovernor, "ONLY_CANDIDATE_GOVERNOR");

        // Update state.
        addGovernor(gub.candidateGovernor);
        gub.candidateGovernor = ZERO_ADDRESS;

        // Send a notification about the change of governor.
        emit LogNewGovernorAccepted(msg.sender);
    }

    /*
      Remove a governor from office.
    */
    function removeGovernor(address governorForRemoval) internal onlyGovernance() {
        require(msg.sender != governorForRemoval, "GOVERNOR_SELF_REMOVE");
        GovernanceInfoStruct storage gub = contractGovernanceInfo();
        require (isGovernor(governorForRemoval), "NOT_GOVERNOR");
        gub.effectiveGovernors[governorForRemoval] = false;
        emit LogRemovedGovernor(governorForRemoval);
    }
}

File 3 of 7: GovernanceStorage.sol
/*
  Copyright 2019,2020 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
pragma solidity ^0.5.2;

/*
  Holds the governance slots for ALL entities, including proxy and the main contract.
*/
contract GovernanceStorage {

    struct GovernanceInfoStruct {
        mapping (address => bool) effectiveGovernors;
        address candidateGovernor;
        bool initialized;
    }

    // A map from a Governor tag to its own GovernanceInfoStruct.
    mapping (string => GovernanceInfoStruct) internal governanceInfo;
}

File 4 of 7: MGovernance.sol
/*
  Copyright 2019,2020 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
pragma solidity ^0.5.2;

contract MGovernance {
    /*
      Allows calling the function only by a Governor.
    */
    modifier onlyGovernance()
    {
        // Pure modifier declarations are not supported. Instead we provide
        // a dummy definition.
        revert("UNIMPLEMENTED");
        _;
    }
}

File 6 of 7: ProxyGovernance.sol
/*
  Copyright 2019,2020 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
pragma solidity ^0.5.2;

import "Governance.sol";

/**
  The Proxy contract is governed by one or more Governors of which the initial one is the
  deployer of the contract.

  A governor has the sole authority to perform the following operations:

  1. Nominate additional governors (:sol:func:`proxyNominateNewGovernor`)
  2. Remove other governors (:sol:func:`proxyRemoveGovernor`)
  3. Add new `implementations` (proxied contracts)
  4. Remove (new or old) `implementations`
  5. Update `implementations` after a timelock allows it

  Adding governors is performed in a two step procedure:

  1. First, an existing governor nominates a new governor (:sol:func:`proxyNominateNewGovernor`)
  2. Then, the new governor must accept governance to become a governor (:sol:func:`proxyAcceptGovernance`)

  This two step procedure ensures that a governor public key cannot be nominated unless there is an
  entity that has the corresponding private key. This is intended to prevent errors in the addition
  process.

  The governor private key should typically be held in a secure cold wallet or managed via a
  multi-sig contract.
*/
/*
  Implements Governance for the proxy contract.
  It is a thin wrapper to the Governance contract,
  which is needed so that it can have non-colliding function names,
  and a specific tag (key) to allow unique state storage.
*/
contract ProxyGovernance is Governance {

    // The tag is the string key that is used in the Governance storage mapping.
    string public constant PROXY_GOVERNANCE_TAG = "StarkEx.Proxy.2019.GovernorsInformation";

    function getGovernanceTag()
        internal
        view
        returns (string memory tag) {
        tag = PROXY_GOVERNANCE_TAG;
    }

    function proxyIsGovernor(address testGovernor) external view returns (bool) {
        return isGovernor(testGovernor);
    }

    function proxyNominateNewGovernor(address newGovernor) external {
        nominateNewGovernor(newGovernor);
    }

    function proxyRemoveGovernor(address governorForRemoval) external {
        removeGovernor(governorForRemoval);
    }

    function proxyAcceptGovernance()
        external
    {
        acceptGovernance();
    }

    function proxyCancelNomination() external {
        cancelNomination();
    }
}

File 7 of 7: ProxyStorage.sol
/*
  Copyright 2019,2020 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
pragma solidity ^0.5.2;

import "GovernanceStorage.sol";

/*
  Holds the Proxy-specific state variables.
  This contract is inherited by the GovernanceStorage (and indirectly by MainStorage)
  to prevent collision hazard.
*/
contract ProxyStorage is GovernanceStorage {

    // Stores the hash of the initialization vector of the added implementation.
    // Upon upgradeTo the implementation, the initialization vector is verified
    // to be identical to the one submitted when adding the implementaion.
    mapping (address => bytes32) internal initializationHash;

    // The time after which we can switch to the implementation.
    mapping (address => uint256) internal enabledTime;

    // A central storage of the flags whether implementation has been initialized.
    // Note - it can be used flexibly enough to accomodate multiple level of initialization
    // (i.e. using different key salting schemes for different initialization levels).
    mapping (bytes32 => bool) internal initialized;
}

Contract Security Audit

Contract ABI

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Swarm Source

bzzr://8b1d55c2ed53dac498876abf4d45681898c9ff1fbd88f8103d56de2194a879ab
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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