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Transaction Hash
Method
Block
From
To
Value
Approve552026492024-03-29 5:21:1534 mins ago1711689675IN
0x23D29D30...D846D4C5C
0 MATIC0.0104144200
Approve552002122024-03-29 3:50:072 hrs ago1711684207IN
0x23D29D30...D846D4C5C
0 MATIC0.0040981878.7022529
Withdraw551977422024-03-29 2:12:543 hrs ago1711678374IN
0x23D29D30...D846D4C5C
0 MATIC0.01020531292.98678094
Approve551977132024-03-29 2:11:543 hrs ago1711678314IN
0x23D29D30...D846D4C5C
0 MATIC0.006314121.25521277
Approve551976852024-03-29 2:10:543 hrs ago1711678254IN
0x23D29D30...D846D4C5C
0 MATIC0.00575698110.5582631
Transfer551959842024-03-29 1:04:164 hrs ago1711674256IN
0x23D29D30...D846D4C5C
0 MATIC0.00701496133.5979887
Approve551945702024-03-29 0:08:175 hrs ago1711670897IN
0x23D29D30...D846D4C5C
0 MATIC0.0024625447.57616439
Approve551914242024-03-28 22:09:527 hrs ago1711663792IN
0x23D29D30...D846D4C5C
0 MATIC0.0030694759.0147184
Approve551901832024-03-28 21:23:388 hrs ago1711661018IN
0x23D29D30...D846D4C5C
0 MATIC0.0040425777.63430895
Approve551888482024-03-28 20:33:359 hrs ago1711658015IN
0x23D29D30...D846D4C5C
0 MATIC0.0031077159.68117779
Transfer551830552024-03-28 16:53:1213 hrs ago1711644792IN
0x23D29D30...D846D4C5C
0 MATIC0.004710789.71404759
Approve551793712024-03-28 14:34:0215 hrs ago1711636442IN
0x23D29D30...D846D4C5C
0 MATIC0.0107789207
Transfer551756672024-03-28 12:15:2217 hrs ago1711628122IN
0x23D29D30...D846D4C5C
0 MATIC0.00754539143.7
Approve551727202024-03-28 10:21:1919 hrs ago1711621279IN
0x23D29D30...D846D4C5C
0 MATIC0.00917451177.29209947
Approve551708102024-03-28 9:06:1120 hrs ago1711616771IN
0x23D29D30...D846D4C5C
0 MATIC0.00891812172.33757084
Approve551666962024-03-28 6:25:0723 hrs ago1711607107IN
0x23D29D30...D846D4C5C
0 MATIC0.0032389562.57633179
Transfer551635262024-03-28 4:23:2525 hrs ago1711599805IN
0x23D29D30...D846D4C5C
0 MATIC0.00489521138.29857176
Approve551555282024-03-27 23:34:3230 hrs ago1711582472IN
0x23D29D30...D846D4C5C
0 MATIC0.0038376974.1439717
Approve551543382024-03-27 22:50:3731 hrs ago1711579837IN
0x23D29D30...D846D4C5C
0 MATIC0.0048427493.00085271
Approve551535062024-03-27 22:19:3331 hrs ago1711577973IN
0x23D29D30...D846D4C5C
0 MATIC0.00542428104.82123732
Approve551528612024-03-27 21:54:5332 hrs ago1711576493IN
0x23D29D30...D846D4C5C
0 MATIC0.0031245390.14820245
Approve551524152024-03-27 21:38:3332 hrs ago1711575513IN
0x23D29D30...D846D4C5C
0 MATIC0.0026929790.40481336
Approve551517982024-03-27 21:15:0632 hrs ago1711574106IN
0x23D29D30...D846D4C5C
0 MATIC0.00525696101.56424731
Approve551456102024-03-27 17:20:5136 hrs ago1711560051IN
0x23D29D30...D846D4C5C
0 MATIC0.00581506112.34676173
Transfer551418332024-03-27 14:55:4938 hrs ago1711551349IN
0x23D29D30...D846D4C5C
0 MATIC0.01113365212.13418185
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Contract Source Code Verified (Exact Match)

Contract Name:
UChildERC20Proxy

Compiler Version
v0.6.6+commit.6c089d02

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, None license
/**
 *Submitted for verification at polygonscan.com on 2021-06-30
*/

// File: contracts/common/Proxy/IERCProxy.sol

pragma solidity 0.6.6;

interface IERCProxy {
    function proxyType() external pure returns (uint256 proxyTypeId);

    function implementation() external view returns (address codeAddr);
}

// File: contracts/common/Proxy/Proxy.sol

pragma solidity 0.6.6;


abstract contract Proxy is IERCProxy {
    function delegatedFwd(address _dst, bytes memory _calldata) internal {
        // solium-disable-next-line security/no-inline-assembly
        assembly {
            let result := delegatecall(
                sub(gas(), 10000),
                _dst,
                add(_calldata, 0x20),
                mload(_calldata),
                0,
                0
            )
            let size := returndatasize()

            let ptr := mload(0x40)
            returndatacopy(ptr, 0, size)

            // revert instead of invalid() bc if the underlying call failed with invalid() it already wasted gas.
            // if the call returned error data, forward it
            switch result
                case 0 {
                    revert(ptr, size)
                }
                default {
                    return(ptr, size)
                }
        }
    }

    function proxyType() external virtual override pure returns (uint256 proxyTypeId) {
        // Upgradeable proxy
        proxyTypeId = 2;
    }

    function implementation() external virtual override view returns (address);
}

// File: contracts/common/Proxy/UpgradableProxy.sol

pragma solidity 0.6.6;


contract UpgradableProxy is Proxy {
    event ProxyUpdated(address indexed _new, address indexed _old);
    event ProxyOwnerUpdate(address _new, address _old);

    bytes32 constant IMPLEMENTATION_SLOT = keccak256("matic.network.proxy.implementation");
    bytes32 constant OWNER_SLOT = keccak256("matic.network.proxy.owner");

    constructor(address _proxyTo) public {
        setProxyOwner(msg.sender);
        setImplementation(_proxyTo);
    }

    fallback() external payable {
        delegatedFwd(loadImplementation(), msg.data);
    }

    receive() external payable {
        delegatedFwd(loadImplementation(), msg.data);
    }

    modifier onlyProxyOwner() {
        require(loadProxyOwner() == msg.sender, "NOT_OWNER");
        _;
    }

    function proxyOwner() external view returns(address) {
        return loadProxyOwner();
    }

    function loadProxyOwner() internal view returns(address) {
        address _owner;
        bytes32 position = OWNER_SLOT;
        assembly {
            _owner := sload(position)
        }
        return _owner;
    }

    function implementation() external override view returns (address) {
        return loadImplementation();
    }

    function loadImplementation() internal view returns(address) {
        address _impl;
        bytes32 position = IMPLEMENTATION_SLOT;
        assembly {
            _impl := sload(position)
        }
        return _impl;
    }

    function transferProxyOwnership(address newOwner) public onlyProxyOwner {
        require(newOwner != address(0), "ZERO_ADDRESS");
        emit ProxyOwnerUpdate(newOwner, loadProxyOwner());
        setProxyOwner(newOwner);
    }

    function setProxyOwner(address newOwner) private {
        bytes32 position = OWNER_SLOT;
        assembly {
            sstore(position, newOwner)
        }
    }

    function updateImplementation(address _newProxyTo) public onlyProxyOwner {
        require(_newProxyTo != address(0x0), "INVALID_PROXY_ADDRESS");
        require(isContract(_newProxyTo), "DESTINATION_ADDRESS_IS_NOT_A_CONTRACT");

        emit ProxyUpdated(_newProxyTo, loadImplementation());
        
        setImplementation(_newProxyTo);
    }

    function updateAndCall(address _newProxyTo, bytes memory data) payable public onlyProxyOwner {
        updateImplementation(_newProxyTo);

        (bool success, bytes memory returnData) = address(this).call{value: msg.value}(data);
        require(success, string(returnData));
    }

    function setImplementation(address _newProxyTo) private {
        bytes32 position = IMPLEMENTATION_SLOT;
        assembly {
            sstore(position, _newProxyTo)
        }
    }
    
    function isContract(address _target) internal view returns (bool) {
        if (_target == address(0)) {
            return false;
        }

        uint256 size;
        assembly {
            size := extcodesize(_target)
        }
        return size > 0;
    }
}

// File: contracts/child/ChildToken/UpgradeableChildERC20/UChildERC20Proxy.sol

pragma solidity 0.6.6;


contract UChildERC20Proxy is UpgradableProxy {
    constructor(address _proxyTo)
        public
        UpgradableProxy(_proxyTo)
    {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_proxyTo","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_new","type":"address"},{"indexed":false,"internalType":"address","name":"_old","type":"address"}],"name":"ProxyOwnerUpdate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_new","type":"address"},{"indexed":true,"internalType":"address","name":"_old","type":"address"}],"name":"ProxyUpdated","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxyOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxyType","outputs":[{"internalType":"uint256","name":"proxyTypeId","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferProxyOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newProxyTo","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"updateAndCall","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_newProxyTo","type":"address"}],"name":"updateImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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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)

000000000000000000000000d3a6e427d7148bae4f3cd4d24caa3d8851cbe23f

-----Decoded View---------------
Arg [0] : _proxyTo (address): 0xD3A6e427d7148bAE4f3cd4D24Caa3d8851CbE23F

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000d3a6e427d7148bae4f3cd4d24caa3d8851cbe23f


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.