Contract 0xae0Ee0A63A2cE6BaeEFFE56e7714FB4EFE48D419 7

 

Contract Overview

StarkNet: StarkGate ETH Bridge
Balance:
2,483.477181642967758587 Ether

EtherValue:
$3,016,779.07 (@ $1,214.74/ETH)

Token:
 
Txn Hash
Method
Block
From
To
Value
0x4f732d52efe69f8de4e856d408bc4c2e927b6ca035018ab451546d064fbc9903Deposit(pending)2022-11-27 16:44:171 hr 32 mins ago0x812f8f3385f5c02cde6820638058166edc275d80 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0xb79b68194412473e7b2f2fb5a31b11a56ff2937a4e805c43422e26af1a3f3bb0Deposit(pending)2022-11-27 16:44:171 hr 32 mins ago0x812f8f3385f5c02cde6820638058166edc275d80 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x524ea1f4258c0e5d36209da1dcd777e5b52e36e5472913af7ce8c48bbb84acceDeposit(pending)2022-11-27 16:38:561 hr 38 mins ago0x31fa14fdbeebb887f68c637aa2307b4decd78fb3 IN StarkNet: StarkGate ETH Bridge0.048 Ether(Pending)(Pending)
0x2adc5bdc66cce8e97527e717d9bc58fd71a6ae58629dab9dc2103c825c6f9bc6Deposit(pending)2022-11-27 16:35:211 hr 41 mins ago0xb487dca4dff9a6e43e7b3133d7f12bcbf94e416e IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x04452479fbc02d10900fcc303ba5836a0717b428347980b761810e1d39977f59Deposit(pending)2022-11-27 16:33:111 hr 43 mins ago0x758db2c7084f60b1b8b27d4bd5f80f4524900183 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x01c0360eb3a3e79b5f8b209320b8b9a91791a27b300ee8ffeb1d1e8c8c23eba9Deposit(pending)2022-11-27 16:32:491 hr 44 mins ago0x9f2298b03dd6de5e1b0ff1c4c1250ca07f2929f5 IN StarkNet: StarkGate ETH Bridge0.0003 Ether(Pending)(Pending)
0x0ccbeb6b0c2e5bfa5681357bcaf9b2311a6d118e7db8ce16bf1515e8fac025f2Deposit(pending)2022-11-27 16:28:431 hr 48 mins ago0xeded6329942c2aa7e377d53cb4f3947f4043690d IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x7e2aae706e781fa0b05223e388b857b4489d167c2f14a2f556e19ae6ff4fb5dcDeposit(pending)2022-11-27 15:47:142 hrs 29 mins ago0xa6c5b6fe16f0d059df6e0d51c1ee2979cb1e2356 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x0470a66e02d92a4b1b0b7696c4fb49ae7e995f1311499e3e24deb5931c31b328Deposit(pending)2022-11-27 14:39:523 hrs 37 mins ago0x2822e90c9a581802a51cc7a7e0c11896ea8b8cbf IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x82cc0304526cb4576b16af7b06886e613b9792b57d858c605016510ca4d21e8aDeposit(pending)2022-11-27 14:28:393 hrs 48 mins ago0x2822e90c9a581802a51cc7a7e0c11896ea8b8cbf IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0xfe1b3a04bb27f19eaa9c3dc7bee3df73dadb5c172db15e65dab229d88431687eDeposit(pending)2022-11-27 14:17:073 hrs 59 mins ago0xadf2feaf880b403190462fad02f822db3c8bc6ca IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x60751646dda3611b3119aa0b98f42a4508adeb2223c44ec3d7a5f6b0ebe9c704Deposit(pending)2022-11-27 13:43:574 hrs 33 mins ago0x9f58bb7336257daf14b9fc91eba7f7bf26d336b0 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x3d04f48fc4b3ab70433a76aef56db35dd8470da439732cf941be0b1934734ae3Deposit(pending)2022-11-27 13:34:294 hrs 42 mins ago0x54733e949758a8ba9b8f2d4519d91e44aee561e3 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x86f8ea53a1e6ad615ebb966a8847b4ff4f935219c6d0c077440bc8dd95759fa0Deposit(pending)2022-11-27 13:34:294 hrs 42 mins ago0x54733e949758a8ba9b8f2d4519d91e44aee561e3 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x9e190070b45f269b036cc855dc580e0af896ea43a091f80864eb32c955b60e56Deposit(pending)2022-11-27 13:25:404 hrs 51 mins ago0x7d29e51089f313a57f1492ac615c0f1fbe8f153e IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x6e12782d5f9c44c1a5efa19153fc25221718ba8c39700b41eb4a4c7ecf167d92Deposit(pending)2022-11-27 13:25:404 hrs 51 mins ago0x7d29e51089f313a57f1492ac615c0f1fbe8f153e IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0xefbdfe3770a2c20cf454dbec93327251754d4941547d8f11d38863661b7f4b01Deposit(pending)2022-11-27 13:17:504 hrs 59 mins ago0xeefbaa752a8bf73029dfc3be3f2b309dbdfd5f3c IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x2f210ebc42405b9df68d14094709ba6990422d4bba3b1f92229514061ea26fdfDeposit(pending)2022-11-27 13:12:555 hrs 4 mins ago0x9f58bb7336257daf14b9fc91eba7f7bf26d336b0 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0xb63b3fd7b17479edff8ab5723969b42884bc07ffc802d18659d34a4fa85c7a48Deposit(pending)2022-11-27 13:01:065 hrs 15 mins ago0xc3e957c5333ae6d178a95434d51522bc4dbc5066 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x65345b698f5e771239bd890ed8b70884794be52e8ff2ae2ee9c055c056fb6424Deposit(pending)2022-11-27 12:02:396 hrs 14 mins ago0x5908f8a691ba7ce0c58e39d9df78fdee99b878ec IN StarkNet: StarkGate ETH Bridge0.0005 Ether(Pending)(Pending)
0x7a09784202f50dda4d322678e10b6647eb8b078bc02f8689251e927054eeda56Deposit(pending)2022-11-27 10:44:297 hrs 32 mins ago0x096d597d2dc2962d4286d75a631ab9dd8cd2c333 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x120ec427480934373a0588c9b71f9a07fa8da9150f60f5fbc61403030b15545dDeposit(pending)2022-11-27 10:01:578 hrs 15 mins ago0xd2ed47796eed6f2ff266e91ddc35542bde0fb673 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x3dfce7177bdd8d0819bf158625e8c81aecd9117208e72fe50702198c472dd357Deposit(pending)2022-11-27 10:01:578 hrs 15 mins ago0xd2ed47796eed6f2ff266e91ddc35542bde0fb673 IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0xd23c18103c5eb84d3efa77af9d58279d87f5fffb74def744bcbe137d54dc0702Deposit(pending)2022-11-27 9:30:348 hrs 46 mins ago0xbe5327f1aac3ecf324df532464086a36ccb4765f IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
0x87d98c394096502a0a6862cb64d218688ed1a9a4c9e20d13f6724e5d0cd58de5Deposit(pending)2022-11-27 9:30:348 hrs 46 mins ago0xbe5327f1aac3ecf324df532464086a36ccb4765f IN StarkNet: StarkGate ETH Bridge0.0001 Ether(Pending)(Pending)
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x12e7d74e00f47a06d2ff7226f0a87491675c9247f260a8b29c8e80b00ccdd8ce160630492022-11-27 18:15:231 min ago StarkNet: StarkGate ETH Bridge0xc3f58bed0f199ffb9626075f0e488068683a797c0.06 Ether
0x2ddb626fe507b30d5288dd406e9574501bd5bac1621819578c9c3f518d5f45fe160630382022-11-27 18:13:113 mins ago StarkNet: StarkGate ETH Bridge0x21383e05df94a7adb53713d28905e159a6332ebb0.02 Ether
0xd1c770fb00e0b7ccdf7da87c67f404549084bbb21c210715e8223c71ebdf3147160630342022-11-27 18:12:234 mins ago StarkNet: StarkGate ETH BridgeENS Name vladweat.eth0.129 Ether
0x607355567b54319c03e3ffcf4e2bdaeb0c9dd977030ab095fe187b93bdc105e4160630302022-11-27 18:11:355 mins ago StarkNet: StarkGate ETH Bridge0x3c0898d19698fee8f26f1021637d19fac3fa2d800.003 Ether
0xdfe370644a9faf7b312ff3b82f8058a5564a76c87ec54f80b4b11bd7354ef466160630252022-11-27 18:10:356 mins ago StarkNet: StarkGate ETH Bridge0x8b9e22d905aba1a211a7a530d2f271db7405505b0.18 Ether
0xd9be0e874c86c84680383a8357cf5f0e604c2d324546f0b456639e938d43bbed160629802022-11-27 18:01:3515 mins ago StarkNet: StarkGate ETH Bridge0x06fcbc39ac47a69470cf30f6245436d9afaecf460.03 Ether
0x42b1e146f7cfd04cb550161950baa3954b586cb059d240c18521fa918665165d160629752022-11-27 18:00:3516 mins ago StarkNet: StarkGate ETH Bridge0x00d6cbee0ebd26d4b0569b28e399161b4b7d90920.08 Ether
0x6ecf7de48d0025bcbbe4db120629b28fabf82bed3d37cdb0c9de89b4e8dc5296160629172022-11-27 17:48:4728 mins ago StarkNet: StarkGate ETH Bridge0x07a115f8c79d4b7d73c9779ce78c124b991d97d70.531 Ether
0xe9b675ef9eaf3b41020fb296075810a906595d8d46b1dec213e9096a5a3bd627160628882022-11-27 17:42:5934 mins ago StarkNet: StarkGate ETH BridgeENS Name aman90.eth0.182 Ether
0xc70162aee005faf3f5ff75363e66e7319daffec200cda19fa52bb09fbb655002160628842022-11-27 17:42:1134 mins ago StarkNet: StarkGate ETH Bridge0x583854644dc011713c0169636846463fcf1846b90.015 Ether
0x512c6d836ea2fc1f0c93585f77d25098241a55507092025cf1041ef63066b4bc160628662022-11-27 17:38:3538 mins ago StarkNet: StarkGate ETH Bridge0xbf10719524c1caf3c5cbb89eec5462f055e6fda90.011 Ether
0x75d4a4a405d7335bbb1d94dc671708c09052582f16a9b012d7cf9cc1a17b2c94160628642022-11-27 17:38:1138 mins ago StarkNet: StarkGate ETH Bridge0x85e16a9da8a6b462f129e5a9ba4957a5f8d2a8c10.07261 Ether
0x6e1501709dd86e5883fb3493df156ef0763988304fcb19c429cc73754b133c86160628552022-11-27 17:36:2340 mins ago StarkNet: StarkGate ETH Bridge0xac148c88444b8a178703edcab1aa3800c7e2097f0.12 Ether
0x8315f88719ffb8a06c32fe0a09a824a95786bd2b593197505352a6e8e88ea644160628482022-11-27 17:34:5942 mins ago StarkNet: StarkGate ETH Bridge0x3469f7dbbe432d8b209ec7c0ac1e0605f1b62a0f0.12261 Ether
0xa94a791b796b899b7db0c3df0b545784f16a8172ff26633c39fe5362352e59a0160628282022-11-27 17:30:5946 mins ago StarkNet: StarkGate ETH Bridge0xb9ba17bfb0f828503b2f107a2c02b67b54879f2f0.144 Ether
0xae12912fc4d3662601fea3142e0c89c07fee19d3a3ed1ecb22becd96631f41a5160628072022-11-27 17:26:4750 mins ago StarkNet: StarkGate ETH Bridge0xf5f130e5c7ebcda91dbe5dadf271389d92554f140.0886 Ether
0xb68c92b7999aa32189c4243de693fe93c3667879eb0e0ce1f84162bcb0fbd999160628032022-11-27 17:25:5951 mins ago StarkNet: StarkGate ETH Bridge0xb846b2ea0767563d3146911b14f48bb7e1f902690.17 Ether
0x3b1171722c6177c0949c20691ce6b0182dd4fdb0333518162377e04b51b99397160627752022-11-27 17:20:1156 mins ago StarkNet: StarkGate ETH Bridge0x06da3715a2bf67bf29f6ac80476e96c0d9403ce70.531 Ether
0x39fd620e8f8b81c243f4ee2672363c59087b424d721db3ea0a5c58176feb7847160627672022-11-27 17:18:2358 mins ago StarkNet: StarkGate ETH Bridge0x80fca40f0c9922128a63d1f66a2a6427691b72ca0.024 Ether
0x172eb1d78dec8e9c0e08092892f721cac21a10f40a2037b9bc7be5022b0bf637160627622022-11-27 17:17:2359 mins ago StarkNet: StarkGate ETH Bridge0xf7c6d71b1a4bf3828899547665fb68c21cbe5c8f0.023 Ether
0x608cfe80a975072b78c4cac7114424c704086267266de33f5c8d2d615384e8f1160627572022-11-27 17:16:231 hr ago StarkNet: StarkGate ETH Bridge0x3c69fd344f55199a79798bdd72f1de26e6397a460.02 Ether
0x885d1c2f59c6c0bbdcc0b55af79e5a7402442c1bec54150ca0490598ed96e0fe160627472022-11-27 17:14:231 hr 2 mins ago StarkNet: StarkGate ETH Bridge0x47c1773a2706a4e1e990ec3e2dd2607ef2c628f70.09 Ether
0xa0c66bf19538a76821b848b0419ff10c82d8f61fffcfdd73ed8781b969fd61ff160627412022-11-27 17:13:111 hr 3 mins ago StarkNet: StarkGate ETH Bridge0x01d9e803faeac1bc2363666dd8d29dfd9a8fcdf90.023 Ether
0xaf67858ef4078035316d065495b47a8cf3b684f9a9a7a89613a33ec5677ebb22160627342022-11-27 17:11:471 hr 5 mins ago StarkNet: StarkGate ETH Bridge0xd8e346beb4876f03cf659be0154048afc6c64a4d0.021 Ether
0x582b307e694c3b83fdfd922ff038b318bed81fdc62a8878e2630354f14ef6cf7160625862022-11-27 16:41:591 hr 35 mins ago StarkNet: StarkGate ETH Bridge0x04336278eeb9230cf52e3c24fd006075939f2bd50.852 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
Proxy

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, Apache-2.0 license

Contract Source Code (Solidity Multiple files format)

File 5 of 8: Proxy.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

import "ProxyGovernance.sol";
import "ProxyStorage.sol";
import "StorageSlots.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, StorageSlots {
    // Emitted when the active implementation is replaced.
    event ImplementationUpgraded(address indexed implementation, bytes initializer);

    // 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, bytes initializer, bool finalize);

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

    using Addresses for address;

    string public constant PROXY_VERSION = "3.0.1";

    constructor(uint256 upgradeActivationDelay) public {
        initGovernance();
        setUpgradeActivationDelay(upgradeActivationDelay);
    }

    function setUpgradeActivationDelay(uint256 delayInSeconds) private {
        bytes32 slot = UPGRADE_DELAY_SLOT;
        assembly {
            sstore(slot, delayInSeconds)
        }
    }

    function getUpgradeActivationDelay() public view returns (uint256 delay) {
        bytes32 slot = UPGRADE_DELAY_SLOT;
        assembly {
            delay := sload(slot)
        }
        return delay;
    }

    /*
      Returns the address of the current implementation.
    */
    // NOLINTNEXTLINE external-function.
    function implementation() public view returns (address _implementation) {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            _implementation := sload(slot)
        }
    }

    /*
      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 == address(0x0)) {
            return false;
        }

        // NOLINTNEXTLINE: 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(), "STATE_IS_FROZEN");
        _;
    }

    /*
      This entry point serves only transactions with empty calldata. (i.e. pure value transfer tx).
      We don't expect to receive such, thus block them.
    */
    receive() external payable {
        revert("CONTRACT_NOT_EXPECTED_TO_RECEIVE");
    }

    /*
      Contract's default function. Delegates execution to the implementation contract.
      It returns back to the external caller whatever the implementation delegated code returns.
    */
    fallback() external payable {
        address _implementation = implementation();
        require(_implementation != address(0x0), "MISSING_IMPLEMENTATION");

        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())
            }
        }
    }

    /*
      Sets the implementation address of the proxy.
    */
    function setImplementation(address newImplementation) private {
        bytes32 slot = IMPLEMENTATION_SLOT;
        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;
        assembly {
            slotValue := sload(slot)
        }
        notFinal = (slotValue == 0);
    }

    /*
      Marks the current implementation as finalized.
    */
    function setFinalizedFlag() private {
        bytes32 slot = FINALIZED_STATE_SLOT;
        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 implVectorHash = keccak256(abi.encode(newImplementation, data, finalize));

        uint256 activationTime = block.timestamp + getUpgradeActivationDelay();

        enabledTime[implVectorHash] = activationTime;
        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 removedImplementation,
        bytes calldata data,
        bool finalize
    ) external onlyGovernance {
        bytes32 implVectorHash = keccak256(abi.encode(removedImplementation, data, finalize));

        // If we have initializer, we set the hash of it.
        uint256 activationTime = enabledTime[implVectorHash];
        require(activationTime > 0, "UNKNOWN_UPGRADE_INFORMATION");
        delete enabledTime[implVectorHash];
        emit ImplementationRemoved(removedImplementation, data, finalize);
    }

    /*
      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 initializing vector (even if empty).
      Therefore, the implementation MUST must have such a method.

      Note - Initialization data is committed to in advance, therefore it must remain valid
      until the actual contract upgrade takes place.

      Care should be taken regarding initialization data and flow when planning the contract upgrade.

      When planning contract upgrade, special care is also needed with regard to governance
      (See comments in Governance.sol).
    */
    // NOLINTNEXTLINE: reentrancy-events timestamp.
    function upgradeTo(
        address newImplementation,
        bytes calldata data,
        bool finalize
    ) external payable onlyGovernance notFinalized notFrozen {
        bytes32 implVectorHash = keccak256(abi.encode(newImplementation, data, finalize));
        uint256 activationTime = enabledTime[implVectorHash];
        require(activationTime > 0, "UNKNOWN_UPGRADE_INFORMATION");
        require(newImplementation.isContract(), "ADDRESS_NOT_CONTRACT");

        // On the first time an implementation is set - time-lock should not be enforced.
        require(
            activationTime <= block.timestamp || implementation() == address(0x0),
            "UPGRADE_NOT_ENABLED_YET"
        );

        setImplementation(newImplementation);

        // NOLINTNEXTLINE: low-level-calls controlled-delegatecall.
        (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.
        // NOLINTNEXTLINE: low-level-calls controlled-delegatecall.
        (success, returndata) = newImplementation.delegatecall(
            abi.encodeWithSignature("isFrozen()")
        );
        require(success, "CALL_TO_ISFROZEN_REVERTED");
        require(!abi.decode(returndata, (bool)), "NEW_IMPLEMENTATION_FROZEN");

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

        emit ImplementationUpgraded(newImplementation, data);
    }
}

File 1 of 8: Common.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

/*
  Common Utility librarries.
  I. Addresses (extending address).
*/
library Addresses {
    function isContract(address account) internal view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function performEthTransfer(address recipient, uint256 amount) internal {
        (bool success, ) = recipient.call{value: amount}(""); // NOLINT: low-level-calls.
        require(success, "ETH_TRANSFER_FAILED");
    }

    /*
      Safe wrapper around ERC20/ERC721 calls.
      This is required because many deployed ERC20 contracts don't return a value.
      See https://github.com/ethereum/solidity/issues/4116.
    */
    function safeTokenContractCall(address tokenAddress, bytes memory callData) internal {
        require(isContract(tokenAddress), "BAD_TOKEN_ADDRESS");
        // NOLINTNEXTLINE: low-level-calls.
        (bool success, bytes memory returndata) = tokenAddress.call(callData);
        require(success, string(returndata));

        if (returndata.length > 0) {
            require(abi.decode(returndata, (bool)), "TOKEN_OPERATION_FAILED");
        }
    }

    /*
      Validates that the passed contract address is of a real contract,
      and that its id hash (as infered fromn identify()) matched the expected one.
    */
    function validateContractId(address contractAddress, bytes32 expectedIdHash) internal {
        require(isContract(contractAddress), "ADDRESS_NOT_CONTRACT");
        (bool success, bytes memory returndata) = contractAddress.call( // NOLINT: low-level-calls.
            abi.encodeWithSignature("identify()")
        );
        require(success, "FAILED_TO_IDENTIFY_CONTRACT");
        string memory realContractId = abi.decode(returndata, (string));
        require(
            keccak256(abi.encodePacked(realContractId)) == expectedIdHash,
            "UNEXPECTED_CONTRACT_IDENTIFIER"
        );
    }
}

/*
  II. StarkExTypes - Common data types.
*/
library StarkExTypes {
    // Structure representing a list of verifiers (validity/availability).
    // A statement is valid only if all the verifiers in the list agree on it.
    // Adding a verifier to the list is immediate - this is used for fast resolution of
    // any soundness issues.
    // Removing from the list is time-locked, to ensure that any user of the system
    // not content with the announced removal has ample time to leave the system before it is
    // removed.
    struct ApprovalChainData {
        address[] list;
        // Represents the time after which the verifier with the given address can be removed.
        // Removal of the verifier with address A is allowed only in the case the value
        // of unlockedForRemovalTime[A] != 0 and unlockedForRemovalTime[A] < (current time).
        mapping(address => uint256) unlockedForRemovalTime;
    }
}

File 2 of 8: Governance.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

import "MGovernance.sol";

/*
  Implements Generic Governance, applicable for both proxy and main contract, and possibly others.
  Notes:
   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.
*/
abstract contract Governance is MGovernance {
    event LogNominatedGovernor(address nominatedGovernor);
    event LogNewGovernorAccepted(address acceptedGovernor);
    event LogRemovedGovernor(address removedGovernor);
    event LogNominationCancelled();

    function getGovernanceInfo() internal view virtual returns (GovernanceInfoStruct storage);

    /*
      Current code intentionally prevents governance re-initialization.
      This may be a problem in an upgrade situation, in a case that the upgrade-to implementation
      performs an initialization (for real) and within that calls initGovernance().

      Possible workarounds:
      1. Clearing the governance info altogether by changing the MAIN_GOVERNANCE_INFO_TAG.
         This will remove existing main governance information.
      2. Modify the require part in this function, so that it will exit quietly
         when trying to re-initialize (uncomment the lines below).
    */
    function initGovernance() internal {
        GovernanceInfoStruct storage gub = getGovernanceInfo();
        require(!gub.initialized, "ALREADY_INITIALIZED");
        gub.initialized = true; // to ensure addGovernor() won't fail.
        // Add the initial governer.
        addGovernor(msg.sender);
    }

    function _isGovernor(address testGovernor) internal view override returns (bool) {
        GovernanceInfoStruct storage gub = getGovernanceInfo();
        return gub.effectiveGovernors[testGovernor];
    }

    /*
      Cancels the nomination of a governor candidate.
    */
    function _cancelNomination() internal onlyGovernance {
        GovernanceInfoStruct storage gub = getGovernanceInfo();
        gub.candidateGovernor = address(0x0);
        emit LogNominationCancelled();
    }

    function _nominateNewGovernor(address newGovernor) internal onlyGovernance {
        GovernanceInfoStruct storage gub = getGovernanceInfo();
        require(!_isGovernor(newGovernor), "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), "ALREADY_GOVERNOR");
        GovernanceInfoStruct storage gub = getGovernanceInfo();
        gub.effectiveGovernors[newGovernor] = true;
    }

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

        // Update state.
        addGovernor(gub.candidateGovernor);
        gub.candidateGovernor = address(0x0);

        // 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 = getGovernanceInfo();
        require(_isGovernor(governorForRemoval), "NOT_GOVERNOR");
        gub.effectiveGovernors[governorForRemoval] = false;
        emit LogRemovedGovernor(governorForRemoval);
    }
}

File 3 of 8: GovernanceStorage.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;
import "MGovernance.sol";

/*
  Holds the governance slots for ALL entities, including proxy and the main contract.
*/
contract GovernanceStorage {
    // A map from a Governor tag to its own GovernanceInfoStruct.
    mapping(string => GovernanceInfoStruct) internal governanceInfo; //NOLINT uninitialized-state.
}

File 4 of 8: MGovernance.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

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

abstract contract MGovernance {
    function _isGovernor(address testGovernor) internal view virtual returns (bool);

    /*
      Allows calling the function only by a Governor.
    */
    modifier onlyGovernance() {
        require(_isGovernor(msg.sender), "ONLY_GOVERNANCE");
        _;
    }
}

File 6 of 8: ProxyGovernance.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

import "Governance.sol";
import "GovernanceStorage.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 GovernanceStorage, 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";

    /*
      Returns the GovernanceInfoStruct associated with the governance tag.
    */
    function getGovernanceInfo() internal view override returns (GovernanceInfoStruct storage) {
        return governanceInfo[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 8: ProxyStorage.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

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 {
    // NOLINTNEXTLINE: naming-convention uninitialized-state.
    mapping(address => bytes32) internal initializationHash_DEPRECATED;

    // The time after which we can switch to the implementation.
    // Hash(implementation, data, finalize) => time.
    mapping(bytes32 => uint256) internal enabledTime;

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

File 8 of 8: StorageSlots.sol
/*
  Copyright 2019-2022 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.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

/**
  StorageSlots holds the arbitrary storage slots used throughout the Proxy pattern.
  Storage address slots are a mechanism to define an arbitrary location, that will not be
  overlapped by the logical contracts.
*/
contract StorageSlots {
    // 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 implementation (the proxied contract).
    bytes32 internal constant IMPLEMENTATION_SLOT =
        0x177667240aeeea7e35eabe3a35e18306f336219e1386f7710a6bf8783f761b24;

    // Storage slot with the address of the call-proxy current implementation.
    // The address of the slot is keccak256("'StarkWare2020.CallProxy.Implemntation.Slot'").
    // We need to keep this variable stored outside of the commonly used space.
    // so that it's not overrun by the logical implementation (the proxied contract).
    bytes32 internal constant CALL_PROXY_IMPL_SLOT =
        0x7184681641399eb4ad2fdb92114857ee6ff239f94ad635a1779978947b8843be;

    // 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;

    // Storage slot to hold the upgrade delay (time-lock).
    // The intention of this slot is to allow modification using an EIC.
    // Web3.solidityKeccak(['string'], ['StarkWare.Upgradibility.Delay.Slot']).
    bytes32 public constant UPGRADE_DELAY_SLOT =
        0xc21dbb3089fcb2c4f4c6a67854ab4db2b0f233ea4b21b21f912d52d18fc5db1f;
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"uint256","name":"upgradeActivationDelay","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"FinalizedImplementation","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"},{"indexed":false,"internalType":"bytes","name":"initializer","type":"bytes"},{"indexed":false,"internalType":"bool","name":"finalize","type":"bool"}],"name":"ImplementationAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"},{"indexed":false,"internalType":"bytes","name":"initializer","type":"bytes"},{"indexed":false,"internalType":"bool","name":"finalize","type":"bool"}],"name":"ImplementationRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"},{"indexed":false,"internalType":"bytes","name":"initializer","type":"bytes"}],"name":"ImplementationUpgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"acceptedGovernor","type":"address"}],"name":"LogNewGovernorAccepted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"nominatedGovernor","type":"address"}],"name":"LogNominatedGovernor","type":"event"},{"anonymous":false,"inputs":[],"name":"LogNominationCancelled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"removedGovernor","type":"address"}],"name":"LogRemovedGovernor","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"PROXY_GOVERNANCE_TAG","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PROXY_VERSION","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"UPGRADE_DELAY_SLOT","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bool","name":"finalize","type":"bool"}],"name":"addImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getUpgradeActivationDelay","outputs":[{"internalType":"uint256","name":"delay","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"_implementation","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"","type":"bytes"}],"name":"initialize","outputs":[],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"isNotFinalized","outputs":[{"internalType":"bool","name":"notFinal","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxyAcceptGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"proxyCancelNomination","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"testGovernor","type":"address"}],"name":"proxyIsGovernor","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newGovernor","type":"address"}],"name":"proxyNominateNewGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"governorForRemoval","type":"address"}],"name":"proxyRemoveGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"removedImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bool","name":"finalize","type":"bool"}],"name":"removeImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bool","name":"finalize","type":"bool"}],"name":"upgradeTo","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : upgradeActivationDelay (uint256): 0

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000000


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://19c6683d777476043460ce621f3b9666d31557ebfc9234842128779cb5705fc8
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.