Contract 0xA1b456Cb659782D054ec19595d477bE0a9B7B188

Txn Hash Method
Block
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Value [Txn Fee]
0xcea0e7b6353b95b8d7327af2669bc17ed461a96f80e802db9ba8f6419e65947f0xf7c8d221105898852023-10-09 15:09:45171 days 22 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.301610322042 4,645.876802867
0xe78541bb51f51eb22311803e83e88d5374d26e5415fd0ca5b29196ae9d6179020xc8da92d178293352023-04-12 7:42:45352 days 5 hrs ago0xd6ea62e0c8b29478717bbedeaeb27e2541636359 IN  0xa1b456cb659782d054ec19595d477be0a9b7b188232 CRO1.034151883821 4,772.010243188
0x5e360a61c2fa557fa42ab3f127497f3b8f69626bbb48e7fb7a43b976746cb9490x101586c278293212023-04-12 7:41:26352 days 5 hrs ago0xf971cbb920d340c94900295972d0d470d8dafb72 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.462564033007 4,772.010757378
0x376b13ea76478f4ae2639b25a97010acd0dcf58812da396afa4ed57ba55374e30x101586c271058132023-02-24 0:20:12399 days 12 hrs ago0xf971cbb920d340c94900295972d0d470d8dafb72 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.250953495724 4,805.186782075
0xbe7a709fdf36f2e3834ea0a62f5c099781badfefc8f11c14976afb6f2bdfb1fb0xc9cd1b0770924132023-02-23 3:19:19400 days 9 hrs ago0xd6ea62e0c8b29478717bbedeaeb27e2541636359 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.3879841056390
0x4075dbef77385bb850027096f2ab76573db8a44f2e8796625e606717f52c17b70xc8da92d170622752023-02-21 4:00:51402 days 9 hrs ago0xe826cabdac5be95bcc638c076b85c11682c05a63 IN  0xa1b456cb659782d054ec19595d477be0a9b7b18880.491261241575774 CRO1.1414810194780
0xa5aac6f57e717e2bbc75fe7b179d5514a3ca519c481558b43fd81b15d2a31f0c0x101586c270615302023-02-21 2:50:43402 days 10 hrs ago0x815b8058b38337433578569b2388070c2fc048ea IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.851590628895 4,807.228609063
0x25b8f4bf2f2d7a3ba2f60f7f399c33c81d5c5af17a622fb1ffea9f2890ee0e340x101586c270611732023-02-21 2:17:08402 days 10 hrs ago0xc3b0170c972e4c4b88556a80f6a6507f962f231d IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.251604697734 4,807.245015456
0x63daa0def699ec2be89922746eaee10dfd3d94b90a9fb217cc56732d66b005570x101586c270558512023-02-20 17:56:15402 days 19 hrs ago0xf971cbb920d340c94900295972d0d470d8dafb72 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO2.237703519124 4,807.489159425
0xd480a286273f2d62303e8a9b5f2b4b3dba0a0e501eee3039bad20add87ce0fa60x101586c270552812023-02-20 17:02:32402 days 20 hrs ago0xc3b0170c972e4c4b88556a80f6a6507f962f231d IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO2.64721510286 4,807.515428129
0xbdf5f18eed19e557871554c2d891022eb76d18041c8f7660c0dc9dea71efe1f7Add Liquidity70524312023-02-20 12:34:22403 days 41 mins ago0x2a7872fd9ed13b04e766079647491dfd63db7f51 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.606561501747 4,807.64628939
0x91a57b772c46ee3d6161b1541a0bb2c1fb7334401adde69185a5df20b3a867760xa06d14d869399192023-02-13 4:00:05410 days 9 hrs ago0x815b8058b38337433578569b2388070c2fc048ea IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.476556765419 4,812.813571905
0x751c470a39961e08844e6e8b42d25c5d3d207a8762d39e10e6e2111d028e58930xa06d14d864886552023-01-14 14:22:38439 days 22 hrs ago0x96266e8d5883f224f9664ed8a30bdbbaa6f266b0 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.945381649396 4,833.462488749
0xc8ac86c3f5f18a00182d7ca0b44744fc3c9baf432e23827d33beade891801bdb0xc8da92d161317692022-12-22 5:52:58463 days 7 hrs ago0xd6ea62e0c8b29478717bbedeaeb27e2541636359 IN  0xa1b456cb659782d054ec19595d477be0a9b7b188103 CRO0.983032006846 4,849.904568266
0xceb429455761ebcfce2cc30b2676a2c5853992a45c7391b6099b86775f9f739f0xc9cd1b0760457222022-12-16 14:45:50468 days 22 hrs ago0xd6ea62e0c8b29478717bbedeaeb27e2541636359 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.48530728691 4,853.881932622
0xf8f464daa7655e822db36b995fd07b0813f2170eebc4ebdda79d6905ec31136e0xc9cd1b0759583642022-12-10 21:29:33474 days 15 hrs ago0x253add9287a8378b621ced9a65e5c13e04896acf IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.384184501761 4,857.929565545
0x61b3316f43e01b739c4c25813aea0cd116f7254209a8b025edbb3b861d3c1b570xa06d14d859190082022-12-08 7:35:41477 days 5 hrs ago0xc3b0170c972e4c4b88556a80f6a6507f962f231d IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO2.029985245869 4,859.749124687
0xbb4d041a12698222e9f001826a1b22eed31f2ffd7f8b90a33fe7e33c7894384e0xf00d613759168762022-12-08 4:14:51477 days 9 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.2851807929290
0x2a38689ae97255541bc3962a70fada6d1f7c6e6bece6fee890c82be0fb5d58990xf00d613759168742022-12-08 4:14:40477 days 9 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.1698808812470
0xebb1c2e9abb0c1f0e6fb81ed1e50e71a54539f273fb86caef4d887b55cdd20590xf00d613759167512022-12-08 4:03:06477 days 9 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.2853074943910
0x139694bfe1b1d74c613d1aeb9bd2da48465a8500dc6eafb8d6d74d0f65f466c30xf00d613759167492022-12-08 4:02:54477 days 9 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.285181143590
0xdbf6fce78b07e249a0ee5c756428032b00e3bcfd4404b5cdd4dd1a0f1715b65f0xf00d613759167462022-12-08 4:02:37477 days 9 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.2851811519160
0xabaa1b92a8f538e733e6a541c0b78aceaadeceacb84a46e24930d667c56eb27e0xf00d613759167452022-12-08 4:02:32477 days 9 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.2851811575060
0x960ad6c72d32a9c8793a3a2f7a4e4cb69afe84d57e78aca2f1be6f86721454860xf00d613759167122022-12-08 3:59:25477 days 9 hrs ago0xd27ecd309f04bfbea90907ad2359de3f794a7b66 IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO0.2851812460430
0x317edc7e3dd23d1f593c9bcb55177ef74e8d982821a39f03a154ec3a22b4426f0xc9cd1b0758849532022-12-06 2:05:32479 days 11 hrs ago0xc3fc7702905038826ebcfc66d142686948f3dbaa IN  0xa1b456cb659782d054ec19595d477be0a9b7b1880 CRO1.06520448380
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xe78541bb51f51eb22311803e83e88d5374d26e5415fd0ca5b29196ae9d61790278293352023-04-12 7:42:45352 days 5 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b188 Mad Meerkat Finance: Master Meerkat & Router232 CRO
0x5e360a61c2fa557fa42ab3f127497f3b8f69626bbb48e7fb7a43b976746cb94978293212023-04-12 7:41:26352 days 5 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xd6ea62e0c8b29478717bbedeaeb27e2541636359171.708750883577991777 CRO
0x5e360a61c2fa557fa42ab3f127497f3b8f69626bbb48e7fb7a43b976746cb94978293212023-04-12 7:41:26352 days 5 hrs ago CronaSwap: Router 0xa1b456cb659782d054ec19595d477be0a9b7b188171.708750883577991777 CRO
0x4075dbef77385bb850027096f2ab76573db8a44f2e8796625e606717f52c17b770622752023-02-21 4:00:51402 days 9 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b188 Mad Meerkat Finance: Master Meerkat & Router80.491261241575774764 CRO
0xa5aac6f57e717e2bbc75fe7b179d5514a3ca519c481558b43fd81b15d2a31f0c70615302023-02-21 2:50:43402 days 10 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xd6ea62e0c8b29478717bbedeaeb27e254163635961.705624168706372371 CRO
0xa5aac6f57e717e2bbc75fe7b179d5514a3ca519c481558b43fd81b15d2a31f0c70615302023-02-21 2:50:43402 days 10 hrs ago CronaSwap: Router 0xa1b456cb659782d054ec19595d477be0a9b7b18861.705624168706372371 CRO
0x63daa0def699ec2be89922746eaee10dfd3d94b90a9fb217cc56732d66b0055770558512023-02-20 17:56:15402 days 19 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xe826cabdac5be95bcc638c076b85c11682c05a6380.471677016397027308 CRO
0x63daa0def699ec2be89922746eaee10dfd3d94b90a9fb217cc56732d66b0055770558512023-02-20 17:56:15402 days 19 hrs ago VVS Finance: Router 0xa1b456cb659782d054ec19595d477be0a9b7b18880.471677016397027308 CRO
0xd480a286273f2d62303e8a9b5f2b4b3dba0a0e501eee3039bad20add87ce0fa670552812023-02-20 17:02:32402 days 20 hrs ago VVS Finance: Router 0xa1b456cb659782d054ec19595d477be0a9b7b18880.586348828395376996 CRO
0x91a57b772c46ee3d6161b1541a0bb2c1fb7334401adde69185a5df20b3a8677669399192023-02-13 4:00:05410 days 9 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xd27ecd309f04bfbea90907ad2359de3f794a7b66128.373630547620718215 CRO
0x91a57b772c46ee3d6161b1541a0bb2c1fb7334401adde69185a5df20b3a8677669399192023-02-13 4:00:05410 days 9 hrs ago VVS Finance: Router 0xa1b456cb659782d054ec19595d477be0a9b7b188128.373630547620718215 CRO
0x751c470a39961e08844e6e8b42d25c5d3d207a8762d39e10e6e2111d028e589364886552023-01-14 14:22:38439 days 22 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880x68ee4b79850f6b172e07115badfd07f90bfcdae7199.547282903115743134 CRO
0x751c470a39961e08844e6e8b42d25c5d3d207a8762d39e10e6e2111d028e589364886552023-01-14 14:22:38439 days 22 hrs ago VVS Finance: Router 0xa1b456cb659782d054ec19595d477be0a9b7b188218.590199346742283182 CRO
0xc8ac86c3f5f18a00182d7ca0b44744fc3c9baf432e23827d33beade891801bdb61317692022-12-22 5:52:58463 days 7 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b188 Mad Meerkat Finance: Master Meerkat & Router103 CRO
0xceb429455761ebcfce2cc30b2676a2c5853992a45c7391b6099b86775f9f739f60457222022-12-16 14:45:50468 days 22 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xd6ea62e0c8b29478717bbedeaeb27e254163635954.897528183979435439 CRO
0xceb429455761ebcfce2cc30b2676a2c5853992a45c7391b6099b86775f9f739f60457222022-12-16 14:45:50468 days 22 hrs ago Mad Meerkat Finance: Master Meerkat & Router 0xa1b456cb659782d054ec19595d477be0a9b7b18854.897528183979435439 CRO
0x61b3316f43e01b739c4c25813aea0cd116f7254209a8b025edbb3b861d3c1b5759190082022-12-08 7:35:41477 days 5 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xd6ea62e0c8b29478717bbedeaeb27e2541636359124.729020531379243698 CRO
0x61b3316f43e01b739c4c25813aea0cd116f7254209a8b025edbb3b861d3c1b5759190082022-12-08 7:35:41477 days 5 hrs ago CronaSwap: Router 0xa1b456cb659782d054ec19595d477be0a9b7b188136.800500557696852403 CRO
0xe25fdae5d720d761a79ef4f9eb6dc8a015840cabbc99fb38e2ba8c5c9d6f68e957851452022-11-29 12:39:36486 days 35 mins ago 0xa1b456cb659782d054ec19595d477be0a9b7b188 Mad Meerkat Finance: Master Meerkat & Router276.244088833595739048 CRO
0xa9fc0a0d64fb1e0f8c91c8a728a3cf8468b92f6312a38fe07776ccf31347e20e57723462022-11-28 16:18:59486 days 20 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b188 Mad Meerkat Finance: Master Meerkat & Router175 CRO
0xaa39703a48fcdda0edb4ae712116033bca97324f4e1b15ed2bd018995f45e45a57722982022-11-28 16:14:27486 days 21 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xd6ea62e0c8b29478717bbedeaeb27e254163635994.941764003942910008 CRO
0xaa39703a48fcdda0edb4ae712116033bca97324f4e1b15ed2bd018995f45e45a57722982022-11-28 16:14:27486 days 21 hrs ago CronaSwap: Router 0xa1b456cb659782d054ec19595d477be0a9b7b188104.422364729596943375 CRO
0x9dc91793a68ee2e8c9f0fe19e36a17a660733c81623f36745030c6c2ee9ef6a557720362022-11-28 15:49:27486 days 21 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b1880xd6ea62e0c8b29478717bbedeaeb27e254163635984.902228579154689705 CRO
0x9dc91793a68ee2e8c9f0fe19e36a17a660733c81623f36745030c6c2ee9ef6a557720362022-11-28 15:49:27486 days 21 hrs ago Mad Meerkat Finance: Master Meerkat & Router 0xa1b456cb659782d054ec19595d477be0a9b7b18893.379321048799673418 CRO
0x8e2bd4180e5a28455d98fb82abc48af034a8d50f203ed940d1a92c956303b27f57719242022-11-28 15:38:44486 days 21 hrs ago 0xa1b456cb659782d054ec19595d477be0a9b7b188 CronaSwap: Router82.331898100077104023 CRO
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Index Block
Loading
This contract may be a proxy contract. Click on More Options and select Is this a proxy? to confirm and enable the "Read as Proxy" & "Write as Proxy" tabs.

Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x5A93c206F5726D4C6a785da2a2364F3751b0060b
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.8.2+commit.661d1103

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at cronoscan.com on 2022-02-20
*/

/**
 *Submitted for verification at FtmScan.com on 2021-09-12
*/

// SPDX-License-Identifier: MIT

pragma solidity ^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 virtual {
        // 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 view virtual 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 virtual {
        _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 virtual {
        _fallback();
    }

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

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @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 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

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

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallSecure(address newImplementation, bytes memory data, bool forceCall) internal {
        address oldImplementation = _getImplementation();

        // Initial upgrade and setup call
        _setImplementation(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }

        // Perform rollback test if not already in progress
        StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT);
        if (!rollbackTesting.value) {
            // Trigger rollback using upgradeTo from the new implementation
            rollbackTesting.value = true;
            Address.functionDelegateCall(
                newImplementation,
                abi.encodeWithSignature(
                    "upgradeTo(address)",
                    oldImplementation
                )
            );
            rollbackTesting.value = false;
            // Check rollback was effective
            require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
            // Finally reset to the new implementation and log the upgrade
            _setImplementation(newImplementation);
            emit Upgraded(newImplementation);
        }
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }

    /**
     * @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 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

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

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

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

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(
            Address.isContract(newBeacon),
            "ERC1967: new beacon is not a contract"
        );
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
}

/**
 * @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.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @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) payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _upgradeToAndCall(_logic, _data, false);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}



/**
 * @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);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(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);
            }
        }
    }
}




/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

/**
 * @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 ERC1967Proxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(address _logic, address admin_, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        _changeAdmin(admin_);
    }

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

    /**
     * @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 virtual ifAdmin {
        _changeAdmin(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 {
        _upgradeToAndCall(newImplementation, bytes(""), false);
    }

    /**
     * @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 {
        _upgradeToAndCall(newImplementation, data, true);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }

    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _getAdmin(), "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":"beacon","type":"address"}],"name":"BeaconUpgraded","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"}]

Deployed Bytecode

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Swarm Source

ipfs://93f028255035b61df476b13b9dba3c4f06f60e51b9b4caee31680b389aef327f
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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