Contract 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3

Contract Overview

Balance:
0 BNB
Txn Hash
Block
From
To
Value [Txn Fee]
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0xbf636ff78acc17c77458db84bb85117b28b2512acabb2d358972f4b1c9d679c292313802021-05-28 7:49:1118 days 8 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x270026a9d7ece8e5f8ceb8786b0bd537eaa2a155583d2a029be395c360d01b4492309762021-05-28 7:28:5918 days 8 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0x614365cec8cbaf1d0a72fa128fb42fa0665655fd11c7da677c1317388400919a92305972021-05-28 7:10:0218 days 9 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x539605220adf2658ded806050e8e65349c1def9149bac129357ebbee9ed029ae92301572021-05-28 6:48:0218 days 9 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0x1b339d6cc48915e1cc608bdbfda31dd1d5c410bc7ef82d0c3304dbe23877285492299972021-05-28 6:40:0218 days 9 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0xce881ce871e63f8d085a39ec5f84813c94a67a2ca887ded6091a575a3d8fe37a92294772021-05-28 6:14:0218 days 10 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0xff962152d295cd15fc1ac69970fd68c7bd9602b29972da46a831d21a1e1d3eef92279372021-05-28 4:57:0218 days 11 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0xfbb74d7223eb2c12b73a93955993a7b4538fdf8db6f87c3c705c34036a82404b92269772021-05-28 4:09:0218 days 12 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x34b254a764d937eaf4c53fb8161fbb435aec6f0b95e15ec6a2a8e0532ba6b25e92247772021-05-28 2:19:0218 days 13 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0x5c15012396a12eacc7d334cd9a21e5ec6ca3dbedeb29335104f753b3322616f492242372021-05-28 1:52:0218 days 14 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0x9c48a4f2d76e2e94cbeb3c6790354a11afdfb577e148dc63d65ece10cb09595b92238372021-05-28 1:32:0218 days 14 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x0ce45a47cb89760e0b3e84d5efc0093c32b2ff0c19185679f36aeeff4fb0c7bf92195372021-05-27 21:57:0218 days 18 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0xb701620c618cf497ff41b0919b1715c0f686043cea45e8d08b3610ea31c10c6992182572021-05-27 20:53:0218 days 19 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0xa6e3c4b699d78c2b3e6307ea53c6ac09a20703302fd0504e64a6b38b2d1829a992177182021-05-27 20:26:0518 days 19 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0xcd1a0eb55b4055291eb9a9670f70a623a4041343802d37d26d86c24ac184e36392172572021-05-27 20:03:0218 days 20 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0x19525078b8260ee6e5e80d470993d70a89cd4b3fa3c0f5f497c1959fbee1c6bb92169182021-05-27 19:46:0518 days 20 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x33ab3280722a41ade17d1c35a0b384f4e7a3caeff357a6754799e80568f6ce3292161572021-05-27 19:08:0218 days 21 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0xd8c97628c2afa8cd871bac8e254580e35fe591542414bf94c31cdf581392ad6992159582021-05-27 18:58:0518 days 21 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392842
0x06f661cebfb987cef7586ed4e30ae4dff1c719790602daa7cbbb89a4e9464c7d92156372021-05-27 18:42:0218 days 21 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x874d9befb5d9bbaf620254a0cdcb10430082c4a3896a2504dde2c1fed210e64592149572021-05-27 18:08:0218 days 22 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392854
0x8ec2821ead979a74cb5b9af2df7790a1eaa3ace34492c8359fac00e1ba3c654a92136372021-05-27 17:02:0218 days 23 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x9b9cb2aa5844670cc25f7761861452eac7ca5a63fb18b22f08128db0bb6f077592129372021-05-27 16:27:0218 days 23 hrs ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0xc7bf747937c4be7c22891e3bd95260c166c458cab5274bd7e583c65b715e79c792116772021-05-27 15:24:0219 days 51 mins ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
0x331cfde5f2df16ee17038fbe5322fdcc754598b284c4d1d830da8c854317d4a492115982021-05-27 15:20:0519 days 55 mins ago0x60cab66b021f13aa7d581364559d9d5bd797c34c IN  0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB0.00392957
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Latest 25 internal transaction
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0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xcf2a666f3fb43269159308497319e7c8db76b14e0 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xc8e4b4849e8867bdb97c62c54a53011244807e320 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xc8e4b4849e8867bdb97c62c54a53011244807e320 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xc8e4b4849e8867bdb97c62c54a53011244807e320 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xcf2a666f3fb43269159308497319e7c8db76b14e0 BNB
0x894efae7102784ca378bb24fbe2581744df0f9baf8a1995bff8adb5464827b1192317772021-05-28 8:09:0218 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0xbf636ff78acc17c77458db84bb85117b28b2512acabb2d358972f4b1c9d679c292313802021-05-28 7:49:1118 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
0xbf636ff78acc17c77458db84bb85117b28b2512acabb2d358972f4b1c9d679c292313802021-05-28 7:49:1118 days 8 hrs ago 0xc8e4b4849e8867bdb97c62c54a53011244807e32 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb30 BNB
0xbf636ff78acc17c77458db84bb85117b28b2512acabb2d358972f4b1c9d679c292313802021-05-28 7:49:1118 days 8 hrs ago 0x4e1c4114247ef76177bdc3e1d43f361e7cc42bb3 0xe4e2858caa2ef7aeab0b6324b9fabe916a5093e50 BNB
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xCE0AeB86F281345B25A1Da2661f2579E33eECe20

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license
/**
 *Submitted for verification at BscScan.com on 2021-02-06
*/

// File: @openzeppelin/contracts/proxy/Proxy.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 * 
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 * 
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     * 
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal {
        // solhint-disable-next-line 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 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 This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal virtual view returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     * 
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback () external payable {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive () external payable {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     * 
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {
    }
}

// File: @openzeppelin/contracts/utils/Address.sol


pragma solidity >=0.6.2 <0.8.0;

/**
 * @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) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

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

        // 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");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

// File: @openzeppelin/contracts/proxy/UpgradeableProxy.sol


pragma solidity >=0.6.0 <0.8.0;



/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 * 
 * Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
 * {TransparentUpgradeableProxy}.
 */
contract UpgradeableProxy is Proxy {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     * 
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) public payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _setImplementation(_logic);
        if(_data.length > 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool success,) = _logic.delegatecall(_data);
            require(success);
        }
    }

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal override view returns (address impl) {
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            impl := sload(slot)
        }
    }

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

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "UpgradeableProxy: new implementation is not a contract");

        bytes32 slot = _IMPLEMENTATION_SLOT;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newImplementation)
        }
    }
}

// File: @openzeppelin/contracts/proxy/TransparentUpgradeableProxy.sol


pragma solidity >=0.6.0 <0.8.0;


/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 * 
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 * 
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 * 
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 * 
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 */
contract TransparentUpgradeableProxy is UpgradeableProxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {UpgradeableProxy-constructor}.
     */
    constructor(address _logic, address admin_, bytes memory _data) public payable UpgradeableProxy(_logic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        _setAdmin(admin_);
    }

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Returns the current admin.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     * 
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address admin_) {
        admin_ = _admin();
    }

    /**
     * @dev Returns the current implementation.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     * 
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address implementation_) {
        implementation_ = _implementation();
    }

    /**
     * @dev Changes the admin of the proxy.
     * 
     * Emits an {AdminChanged} event.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external ifAdmin {
        require(newAdmin != address(0), "TransparentUpgradeableProxy: new admin is the zero address");
        emit AdminChanged(_admin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the implementation of the proxy.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeTo(newImplementation);
    }

    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeTo(newImplementation);
        // solhint-disable-next-line avoid-low-level-calls
        (bool success,) = newImplementation.delegatecall(data);
        require(success);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view returns (address adm) {
        bytes32 slot = _ADMIN_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            adm := sload(slot)
        }
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        bytes32 slot = _ADMIN_SLOT;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newAdmin)
        }
    }

    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal override virtual {
        require(msg.sender != _admin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"address","name":"admin_","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"stateMutability":"payable","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":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"admin_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"implementation_","type":"address"}],"stateMutability":"nonpayable","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"},{"stateMutability":"payable","type":"receive"}]

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Deployed ByteCode Sourcemap

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Swarm Source

ipfs://8eeceb0a7f3a53b8c489bf9bd60e4d9a9c7cfcacf59ddaec03c5bbdb54e76e82
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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