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Transaction Hash
Method
Block
From
To
Value
Approve520155412024-01-06 18:06:5682 days ago1704564416IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0010217634.30126848
Approve519222992024-01-04 8:07:3085 days ago1704355650IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00389539130.7706197
Transfer451939722023-07-17 16:37:46255 days ago1689611866IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00558659161.76138634
Approve439880302023-06-16 19:37:40286 days ago1686944260IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00894767172.7883572
Approve413382232023-04-09 18:29:55354 days ago1681064995IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00340176114.19907547
Approve413382132023-04-09 18:29:35354 days ago1681064975IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00351565118.02261979
Approve391515692023-02-10 22:57:04412 days ago1676069824IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00780824149.95096389
Approve391485102023-02-10 21:04:01412 days ago1676063041IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00702574134.92358286
Approve380594412023-01-14 7:46:15440 days ago1673682375IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0028639655
Approve369254292022-12-17 4:23:20468 days ago1671251000IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0022039473.98776002
Approve365854972022-12-08 17:03:06476 days ago1670518986IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00810555155.66053954
Transfer364410722022-12-05 4:27:01480 days ago1670214421IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0016330331.07933673
Approve324644652022-08-30 0:47:26577 days ago1661820446IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0017302133.22742987
Approve320827002022-08-19 19:17:34587 days ago1660936654IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0014447148.50000006
Approve315484552022-08-05 12:42:29601 days ago1659703349IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0025263548.51652939
Approve314152102022-08-02 1:33:34605 days ago1659404014IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0017551633.70644702
Transfer308739592022-07-18 20:58:21619 days ago1658177901IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0017740130.95581187
Transfer308717262022-07-18 19:31:43619 days ago1658172703IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0017797931.06318165
Withdraw303845722022-07-06 0:15:05632 days ago1657066505IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00359045103.04365606
Withdraw302188432022-07-01 15:57:46636 days ago1656691066IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0012665336.34872915
Approve301776752022-06-30 14:00:09637 days ago1656597609IN
0x232eaB56...b7B43c6Ad
0 MATIC0.00841829161.66637935
Withdraw301497992022-06-29 20:55:17638 days ago1656536117IN
0x232eaB56...b7B43c6Ad
0 MATIC0.002056559.02046854
Withdraw298024172022-06-20 20:06:05647 days ago1655755565IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0018838354.02773871
Approve296271352022-06-16 6:07:59652 days ago1655359679IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0020412239.20000001
Withdraw294463832022-06-11 18:37:01656 days ago1654972621IN
0x232eaB56...b7B43c6Ad
0 MATIC0.0012834136.8332907
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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)

000000000000000000000000b6a37ebc80cd8be633079e5cd80662171ae87610

-----Decoded View---------------
Arg [0] : _proxyTo (address): 0xb6A37eBc80CD8be633079e5cD80662171ae87610

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000b6a37ebc80cd8be633079e5cd80662171ae87610


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