Contract 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 27

 
This is the native USDC token deployed by Circle to Arbitrum. While Bridged USDC will function on Arbitrum, it won't be fungible with Circle's native smart contract.
Txn Hash Method
Block
From
To
Value [Txn Fee]
0xc77df0a9ea968463bfcfddfeed2ae2ac7bb3b1f285532d834702ec1b0e48814eApprove2008317252024-04-14 5:30:011 sec ago0x61963275edbbe1b71b1eac37b247d503abf921ca IN  Circle: USDC Token0 ETH0.00000075 0.01
0x13459ad419a9d786b0bb10d84029268fcb8ee676a65ef0e81f491e7a4098d808Transfer2008317232024-04-14 5:30:011 sec ago0x87a224a2f6ce4ac76ebc9afd4cc29a257a658377 IN  Circle: USDC Token0 ETH0.00000094 0.01
0xa0f1c1e848c09b19c8b317dc8a05446d89d7fe4993a089c3f81cdd73ac90174cApprove2008317212024-04-14 5:30:002 secs ago0xaf430a0497cf402eb758637746b836072857bc07 IN  Circle: USDC Token0 ETH0.00000092 0.01
0xdd8e4df59d2b2d47f903dd6c2e1f133aac48db9be112587be13436316d0a4592Transfer2008317172024-04-14 5:29:593 secs ago0xff04ece2cae2bf3dabe6fdbe5775e71ffffcd584 IN  Circle: USDC Token0 ETH0.000000760.01
0x86f6f26357dee1c242995696bb149421192fec3588cbe4607eb703e45c21eb96Transfer2008317162024-04-14 5:29:593 secs ago0xe2417c73decad0909456ea4ffa0bb6cb96c4f89f IN  Circle: USDC Token0 ETH0.000000810.01
0xfe0296ce2ed824867bbd9c73e53bcfd982208e97ea396e56100ddf15ca80eb98Transfer2008317152024-04-14 5:29:593 secs ago0x5cdde6833dc9db99b3e0d2100f998ed3018bc90e IN  Circle: USDC Token0 ETH0.00000077 0.01
0x0c46ad987f058d4fd58d6d60f53a9596a08a3093d799a2764f896aecd5093291Approve2008317052024-04-14 5:29:566 secs ago0x43d941d2ca56548d3b3a0ac646358f35f218cebc IN  Circle: USDC Token0 ETH0.00000092 0.01
0x64d3fe5cdea62647951a47ede26ae321747a54ec3a82fda5be8c7bb1eed1fb12Approve2008316882024-04-14 5:29:5210 secs ago0xd69005f707ed755d530fba0fbea9ede0749f9832 IN  Circle: USDC Token0 ETH0.00000092 0.01
0xba4fa6d4c32fe8b45657b3fad017b6440b03952b94024546fc0778ddcbecd155Transfer2008316792024-04-14 5:29:5012 secs ago0x8f862c794ec6cc411efba9d778274fe73ef505c8 IN  Circle: USDC Token0 ETH0.000000980.01
0x33b04ece7237f56c7d81f54aafb72da8f87ed7521b536a6e2acc9c34f18278baApprove2008316762024-04-14 5:29:4913 secs ago0x19886b1fc8740652b691dde65b3b2a3a84eff55b IN  Circle: USDC Token0 ETH0.000000920.01
0x46a54f359d9a78f69e9cef38509ae0ebb8cc1b909280334b1060b601c3d2f6b4Approve2008316412024-04-14 5:29:4022 secs ago0x0f8b8801a738ba366b1703c35057c0fa6bcef5dd IN  Circle: USDC Token0 ETH0.00000092 0.01
0x546d044f1f81ae41e63192ba9959f48a11c894e03e4ae1ec5b0be2ccc9c5147aApprove2008316092024-04-14 5:29:3230 secs ago0xd78d0cc81356b39bbe04377e4a6060de410b7ce0 IN  Circle: USDC Token0 ETH0.00000092 0.01
0x55ebae6da211d3ddc4c4a0526547b02a808c68c1810545430512b8caafab3d62Approve2008316062024-04-14 5:29:3131 secs ago0x16c5f124cbf244fcf3f0a986b7aee0042f3f2fd2 IN  Circle: USDC Token0 ETH0.00000092 0.01
0x108140594cfec3cb7172c074a89b7d9cdbe5c76be5d4b7eadc688a4083a6f298Transfer2008316042024-04-14 5:29:3131 secs ago0x7bef7fff4b2dcfc39ed2ab73a9c4a8c5346b5282 IN  Circle: USDC Token0 ETH0.00000082 0.01
0xf8f37412177f62a54ecfa837590c96b75f62355a5bac7251adf7c62fc5ef297dApprove2008315992024-04-14 5:29:2933 secs ago0x32a6b0212c1e8ea1672db5fdecff60ec0972a5f5 IN  Circle: USDC Token0 ETH0.000000910.01
0x6f8c59d06624d0aface54b474a9a2cc933e4c4d6a39be2fddc470addc3e86a8cApprove2008315952024-04-14 5:29:2834 secs ago0x29862b9b4ed9ed5fce085dd8418bff861b58faef IN  Circle: USDC Token0 ETH0.000000920.01
0x42bf8667d49cae0ffcfda9c6dfae3797a9e603159879f0821538ec9cecf98ae4Transfer2008315862024-04-14 5:29:2636 secs ago0x7375ad200b14371d59a42fd1afeaa4473bf3f250 IN  Circle: USDC Token0 ETH0.00000082 0.01
0x97d2a3a6f340b28cf40a64a7ee0779fb6bf0702322a0bb80f1604be9cd6e9f53Transfer2008315772024-04-14 5:29:2438 secs ago0xf2a86d2246140bed0c4e51f15074cb5213f17c66 IN  Circle: USDC Token0 ETH0.000000810.01
0x96d065ef02889cde8eedd1a8251d8f6ab455a3cdcecc5fe12f50ee3d808adddbTransfer2008315632024-04-14 5:29:2042 secs ago0x467e41b8f255a690fa3fde18276a5fb9a4d08946 IN  Circle: USDC Token0 ETH0.000000760.01
0x1105f1f07a7f3fcad5f3ac0c4a4e4d7ecab4bb232241ce9eef58a8fc1982776bApprove2008315612024-04-14 5:29:2042 secs ago0x901d76bdab90d432e9d7dbb1edf4b37051ffa306 IN  Circle: USDC Token0 ETH0.00000075 0.01
0x21574ce7fc8cb9f8d88c52d82d28b282557d34fa0befb649547c4f529a6bd520Approve2008315562024-04-14 5:29:1943 secs ago0xdc1637d06f87aef1f8edaad93d7299105c22df92 IN  Circle: USDC Token0 ETH0.00000092 0.01
0xa08c329e7694abdab36aab95c68af67ce870f5274e3b3f81f96e7416b2f024f1Transfer2008315532024-04-14 5:29:1844 secs ago0xb8ffcf58809c54746ad695c37890889bdfe145ad IN  Circle: USDC Token0 ETH0.000000810.01
0x25922b22b49e1ff6b0bff98f68fd1b370109914b5cb82615d9a577c3b7e32283Transfer2008315402024-04-14 5:29:1547 secs agoCoinbase 4 IN  Circle: USDC Token0 ETH0.00000099 0.01
0xad07c10be7c4e501eb7e949c6eb3de54fe7575f4fb2154d680f3c7fd25cc77f2Transfer2008315312024-04-14 5:29:1250 secs ago0x6c8586e6d20c749769cb5faebfe7fc7dffaf4c7e IN  Circle: USDC Token0 ETH0.000000930.01
0x75b580bdacac58fc1bfaf1ebf062ea76b3153f9168f63c7ef482d6d7f1b74fb6Approve2008314942024-04-14 5:29:0359 secs ago0x3d80e393a3867d549980304dd49eb2ad1de62deb IN  Circle: USDC Token0 ETH0.00000092 0.01
[ Download CSV Export 

OVERVIEW

USDC is a fully collateralized US Dollar stablecoin developed by CENTRE, the open source project with Circle being the first of several forthcoming issuers.

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xc7875bfb171fbb3ca9df4124155bc3c8cc83a7240ba540e94a5a1987216ce470697806922023-03-14 15:16:28396 days 14 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0xa6aae9bcb90d86894b45c4641e72fcb934be07ca75430dae7bd838a4b7c545a3441852432022-12-06 21:11:30494 days 8 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0xa6aae9bcb90d86894b45c4641e72fcb934be07ca75430dae7bd838a4b7c545a3441852432022-12-06 21:11:30494 days 8 hrs ago 0x8aff09e2259cacbf4fc4e3e53f3bf799efeeab36 Circle: USDC Token0 ETH
0xa6aae9bcb90d86894b45c4641e72fcb934be07ca75430dae7bd838a4b7c545a3441852432022-12-06 21:11:30494 days 8 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0xa6aae9bcb90d86894b45c4641e72fcb934be07ca75430dae7bd838a4b7c545a3441852432022-12-06 21:11:30494 days 8 hrs ago 0x8aff09e2259cacbf4fc4e3e53f3bf799efeeab36 Circle: USDC Token0 ETH
0xa6aae9bcb90d86894b45c4641e72fcb934be07ca75430dae7bd838a4b7c545a3441852432022-12-06 21:11:30494 days 8 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0xa6aae9bcb90d86894b45c4641e72fcb934be07ca75430dae7bd838a4b7c545a3441852432022-12-06 21:11:30494 days 8 hrs ago 0x8aff09e2259cacbf4fc4e3e53f3bf799efeeab36 Circle: USDC Token0 ETH
0x910eb4c57048cd27b7e09cebcd18d4269683d8a0a14398447f54f2de9cd194b4411134362022-11-25 14:18:36505 days 15 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x9a58f4b62939700eb93f7f8496a0732c37481fc3098d000cfd4fbd133c527cbb411104712022-11-25 14:05:26505 days 15 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x314f6c4ed14aeaf21c017fd752f320523cb2f36d47e31a571fbffd9a28b81ed4410960402022-11-25 13:01:18505 days 16 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0xb63e9f77568f251628f7831092ccf4c1e6d71cf8b21782e65a1c29211136f6e6408938112022-11-24 18:12:24506 days 11 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x14178b5ee1adb14d5f39016e87a4641831274ccbafe2b0490efd7b90448fc520408936292022-11-24 18:11:32506 days 11 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x8912100129a59e5f92cd12b6bfbe838a1b71b9465d2be093bbe54e238a057efc408780272022-11-24 16:49:12506 days 12 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x3001643ec5374a8de9b1fad7dce539370d07ea340f360053322691545a66154d408778272022-11-24 16:48:18506 days 12 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x94f090411cbd0160fc277ea97283051ea0b76b18b5980b03f3e340423aa5ef3c408672322022-11-24 15:57:07506 days 13 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0xce9baf9859a3ba93388c5919e6ff4edf1792951981b992c65dc35b786c4630e0408666382022-11-24 15:54:07506 days 13 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x9778c924f75c7045b9e096144fea7d451dbe7cdc7fe4e0d69208dbcc1605b123405975932022-11-23 16:31:23507 days 12 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x3d7cf67e9331bacc85bd4be729612644e802582a2121f8c451fce30ddf3cf3c4405848302022-11-23 15:34:33507 days 13 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x0b7aaa8c06052e3dad9ef4c69aada2d9e22131a96511fd77bf1d604e03efea07405782092022-11-23 15:05:29507 days 14 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x8c5e4ecedd89bde359091a109554da25ed229c35d33019c6c0770a294bedfd83405648602022-11-23 14:07:19507 days 15 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x83a9d641a317a99239c620e91946cb25d4e1e047bc83a37c656d2af2dd44235a405407702022-11-23 12:18:02507 days 17 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0xffd2d1b4b936fb85e59b78558c8f48881ec9f7d5c60dbe0d69fb0b83327aa290405170982022-11-23 10:30:37507 days 18 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x6fba0ede4963307c9db4cbab21c0a99cf7e1a66dab99dfe4784a00fde4c44597403521542022-11-22 20:28:37508 days 9 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x0a884190f134b7dad525348f072de4823a99e14c92214e0bfe47379aceb14a97403512512022-11-22 20:24:36508 days 9 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
0x7707b5c743043c52cff2700882ce07b41cdeb6e65bef8cdffb2b2128a7d8a9e1403439072022-11-22 19:51:32508 days 9 hrs ago Circle: USDC Token 0x0f4fb9474303d10905ab86aa8d5a65fe44b6e04a0 ETH
[ Download CSV Export 
Loading

Contract Source Code Verified (Exact Match)

Contract Name:
FiatTokenProxy

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 10000000 runs

Other Settings:
default evmVersion
File 1 of 5 : FiatTokenProxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018-2020 CENTRE SECZ
 *
 * 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
 * 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
 * SOFTWARE.
 */

pragma solidity 0.6.12;

import {
    AdminUpgradeabilityProxy
} from "../upgradeability/AdminUpgradeabilityProxy.sol";

/**
 * @title FiatTokenProxy
 * @dev This contract proxies FiatToken calls and enables FiatToken upgrades
 */
contract FiatTokenProxy is AdminUpgradeabilityProxy {
    constructor(address implementationContract)
        public
        AdminUpgradeabilityProxy(implementationContract)
    {}
}

File 2 of 5 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 3 of 5 : UpgradeabilityProxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018 zOS Global Limited.
 *
 * 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
 * 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
 * SOFTWARE.
 */

pragma solidity 0.6.12;

import { Proxy } from "./Proxy.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";

/**
 * @notice This contract implements a proxy that allows to change the
 * implementation address to which it will delegate.
 * Such a change is called an implementation upgrade.
 * @dev Forked from https://github.com/zeppelinos/zos-lib/blob/8a16ef3ad17ec7430e3a9d2b5e3f39b8204f8c8d/contracts/upgradeability/UpgradeabilityProxy.sol
 * Modifications:
 * 1. Reformat, conform to Solidity 0.6 syntax, and add error messages (5/13/20)
 * 2. Use Address utility library from the latest OpenZeppelin (5/13/20)
 */
contract UpgradeabilityProxy is Proxy {
    /**
     * @dev Emitted when the implementation is upgraded.
     * @param implementation Address of the new implementation.
     */
    event Upgraded(address implementation);

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "org.zeppelinos.proxy.implementation", and is
     * validated in the constructor.
     */
    bytes32
        private constant IMPLEMENTATION_SLOT = 0x7050c9e0f4ca769c69bd3a8ef740bc37934f8e2c036e5a723fd8ee048ed3f8c3;

    /**
     * @dev Contract constructor.
     * @param implementationContract Address of the initial implementation.
     */
    constructor(address implementationContract) public {
        assert(
            IMPLEMENTATION_SLOT ==
                keccak256("org.zeppelinos.proxy.implementation")
        );

        _setImplementation(implementationContract);
    }

    /**
     * @dev Returns the current implementation.
     * @return impl Address of the current implementation
     */
    function _implementation() internal override view returns (address impl) {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            impl := sload(slot)
        }
    }

    /**
     * @dev Upgrades the proxy to a new implementation.
     * @param newImplementation Address of the new implementation.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Sets the implementation address of the proxy.
     * @param newImplementation Address of the new implementation.
     */
    function _setImplementation(address newImplementation) private {
        require(
            Address.isContract(newImplementation),
            "Cannot set a proxy implementation to a non-contract address"
        );

        bytes32 slot = IMPLEMENTATION_SLOT;

        assembly {
            sstore(slot, newImplementation)
        }
    }
}

File 4 of 5 : Proxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018 zOS Global Limited.
 *
 * 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
 * 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
 * SOFTWARE.
 */

pragma solidity 0.6.12;

/**
 * @notice Implements delegation of calls to other contracts, with proper
 * forwarding of return values and bubbling of failures.
 * It defines a fallback function that delegates all calls to the address
 * returned by the abstract _implementation() internal function.
 * @dev Forked from https://github.com/zeppelinos/zos-lib/blob/8a16ef3ad17ec7430e3a9d2b5e3f39b8204f8c8d/contracts/upgradeability/Proxy.sol
 * Modifications:
 * 1. Reformat and conform to Solidity 0.6 syntax (5/13/20)
 */
abstract contract Proxy {
    /**
     * @dev Fallback function.
     * Implemented entirely in `_fallback`.
     */
    fallback() external payable {
        _fallback();
    }

    /**
     * @return The Address of the implementation.
     */
    function _implementation() internal virtual view returns (address);

    /**
     * @dev Delegates execution to an implementation contract.
     * This is a low level function that doesn't return to its internal call site.
     * It will return to the external caller whatever the implementation returns.
     * @param implementation Address to delegate.
     */
    function _delegate(address implementation) internal {
        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 because we don't know the 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())
                }
        }
    }

    /**
     * @dev Function that is run as the first thing in the fallback function.
     * Can be redefined in derived contracts to add functionality.
     * Redefinitions must call super._willFallback().
     */
    function _willFallback() internal virtual {}

    /**
     * @dev fallback implementation.
     * Extracted to enable manual triggering.
     */
    function _fallback() internal {
        _willFallback();
        _delegate(_implementation());
    }
}

File 5 of 5 : AdminUpgradeabilityProxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018 zOS Global Limited.
 *
 * 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
 * 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
 * SOFTWARE.
 */

pragma solidity 0.6.12;

import { UpgradeabilityProxy } from "./UpgradeabilityProxy.sol";

/**
 * @notice This contract combines an upgradeability proxy with an authorization
 * mechanism for administrative tasks.
 * @dev Forked from https://github.com/zeppelinos/zos-lib/blob/8a16ef3ad17ec7430e3a9d2b5e3f39b8204f8c8d/contracts/upgradeability/AdminUpgradeabilityProxy.sol
 * Modifications:
 * 1. Reformat, conform to Solidity 0.6 syntax, and add error messages (5/13/20)
 * 2. Remove ifAdmin modifier from admin() and implementation() (5/13/20)
 */
contract AdminUpgradeabilityProxy is UpgradeabilityProxy {
    /**
     * @dev Emitted when the administration has been transferred.
     * @param previousAdmin Address of the previous admin.
     * @param newAdmin Address of the new admin.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "org.zeppelinos.proxy.admin", and is
     * validated in the constructor.
     */
    bytes32
        private constant ADMIN_SLOT = 0x10d6a54a4754c8869d6886b5f5d7fbfa5b4522237ea5c60d11bc4e7a1ff9390b;

    /**
     * @dev Modifier to check whether the `msg.sender` is the admin.
     * If it is, it will run the function. Otherwise, it will delegate the call
     * to the implementation.
     */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Contract constructor.
     * It sets the `msg.sender` as the proxy administrator.
     * @param implementationContract address of the initial implementation.
     */
    constructor(address implementationContract)
        public
        UpgradeabilityProxy(implementationContract)
    {
        assert(ADMIN_SLOT == keccak256("org.zeppelinos.proxy.admin"));

        _setAdmin(msg.sender);
    }

    /**
     * @return The address of the proxy admin.
     */
    function admin() external view returns (address) {
        return _admin();
    }

    /**
     * @return The address of the implementation.
     */
    function implementation() external view returns (address) {
        return _implementation();
    }

    /**
     * @dev Changes the admin of the proxy.
     * Only the current admin can call this function.
     * @param newAdmin Address to transfer proxy administration to.
     */
    function changeAdmin(address newAdmin) external ifAdmin {
        require(
            newAdmin != address(0),
            "Cannot change the admin of a proxy to the zero address"
        );
        emit AdminChanged(_admin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the backing implementation of the proxy.
     * Only the admin can call this function.
     * @param newImplementation Address of the new implementation.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeTo(newImplementation);
    }

    /**
     * @dev Upgrade the backing implementation of the proxy and call a function
     * on the new implementation.
     * This is useful to initialize the proxied contract.
     * @param newImplementation Address of the new implementation.
     * @param data Data to send as msg.data in the low level call.
     * It should include the signature and the parameters of the function to be
     * called, as described in
     * https://solidity.readthedocs.io/en/develop/abi-spec.html#function-selector-and-argument-encoding.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data)
        external
        payable
        ifAdmin
    {
        _upgradeTo(newImplementation);
        // prettier-ignore
        // solhint-disable-next-line avoid-low-level-calls
        (bool success,) = address(this).call{value: msg.value}(data);
        // solhint-disable-next-line reason-string
        require(success);
    }

    /**
     * @return adm The admin slot.
     */
    function _admin() internal view returns (address adm) {
        bytes32 slot = ADMIN_SLOT;

        assembly {
            adm := sload(slot)
        }
    }

    /**
     * @dev Sets the address of the proxy admin.
     * @param newAdmin Address of the new proxy admin.
     */
    function _setAdmin(address newAdmin) internal {
        bytes32 slot = ADMIN_SLOT;

        assembly {
            sstore(slot, newAdmin)
        }
    }

    /**
     * @dev Only fall back when the sender is not the admin.
     */
    function _willFallback() internal override {
        require(
            msg.sender != _admin(),
            "Cannot call fallback function from the proxy admin"
        );
        super._willFallback();
    }
}

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 10000000
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"implementationContract","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"}]

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Deployed Bytecode

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

0000000000000000000000000f4fb9474303d10905ab86aa8d5a65fe44b6e04a

-----Decoded View---------------
Arg [0] : implementationContract (address): 0x0f4fb9474303d10905AB86aA8d5A65FE44b6E04A

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000f4fb9474303d10905ab86aa8d5a65fe44b6e04a


Block Transaction Gas Used Reward
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