MATIC Price: $0.538939 (+0.48%)
Gas: 30.9 GWei
 
Transaction Hash
Method
Block
From
To
Withdraw581647272024-06-14 21:06:3037 days ago1718399190IN
0x95c300e7...B2F9c3b89
0 MATIC0.0013249838
Transfer573295092024-05-24 9:03:3759 days ago1716541417IN
0x95c300e7...B2F9c3b89
0 MATIC0.0019726237.55955737
Approve573197362024-05-24 2:56:2859 days ago1716519388IN
0x95c300e7...B2F9c3b89
0 MATIC0.0014596149
Approve570099412024-05-15 21:08:2267 days ago1715807302IN
0x95c300e7...B2F9c3b89
0 MATIC0.0015621630.00000003
Approve565970602024-05-05 6:58:1378 days ago1714892293IN
0x95c300e7...B2F9c3b89
0 MATIC0.0015621630.00000006
Approve563327472024-04-28 1:58:1585 days ago1714269495IN
0x95c300e7...B2F9c3b89
0 MATIC0.0037692872.78863565
Approve562205952024-04-25 2:26:1288 days ago1714011972IN
0x95c300e7...B2F9c3b89
0 MATIC0.0050748398
Approve560179272024-04-19 20:11:2993 days ago1713557489IN
0x95c300e7...B2F9c3b89
0 MATIC0.0048280792.7191895
Approve555473752024-04-07 11:34:54105 days ago1712489694IN
0x95c300e7...B2F9c3b89
0 MATIC0.00697009133.8549657
Approve546502812024-03-14 13:58:27129 days ago1710424707IN
0x95c300e7...B2F9c3b89
0 MATIC0.02671866513.10993402
Transfer541240792024-03-01 4:19:14143 days ago1709266754IN
0x95c300e7...B2F9c3b89
0 MATIC0.0041500279
Approve537933572024-02-21 18:06:17151 days ago1708538777IN
0x95c300e7...B2F9c3b89
0 MATIC0.0051495399.44266284
Approve530052512024-02-01 16:18:37171 days ago1706804317IN
0x95c300e7...B2F9c3b89
0 MATIC0.00781938151
Approve523226092024-01-14 18:58:28189 days ago1705258708IN
0x95c300e7...B2F9c3b89
0 MATIC0.0020713640
Approve519021892024-01-03 19:15:46200 days ago1704309346IN
0x95c300e7...B2F9c3b89
0 MATIC0.01936579371.90415522
Approve519020642024-01-03 19:11:22200 days ago1704309082IN
0x95c300e7...B2F9c3b89
0 MATIC0.01227637235.75767229
Approve514174252023-12-22 9:40:23213 days ago1703238023IN
0x95c300e7...B2F9c3b89
0 MATIC0.0134898259.06056668
Withdraw506390512023-12-02 4:31:29233 days ago1701491489IN
0x95c300e7...B2F9c3b89
0 MATIC0.00348659100.06304028
Approve489840312023-10-21 14:06:57274 days ago1697897217IN
0x95c300e7...B2F9c3b89
0 MATIC0.01044968201.7937302
Approve487278182023-10-15 1:13:27281 days ago1697332407IN
0x95c300e7...B2F9c3b89
0 MATIC0.0012546542.11952381
Approve480987742023-09-28 21:39:06297 days ago1695937146IN
0x95c300e7...B2F9c3b89
0 MATIC0.003748672.38930337
Transfer480481572023-09-27 14:24:37298 days ago1695824677IN
0x95c300e7...B2F9c3b89
0 MATIC0.0045177586
Approve474948402023-09-13 14:13:10312 days ago1694614390IN
0x95c300e7...B2F9c3b89
0 MATIC0.00599592115.86776918
Approve474540052023-09-12 13:32:46313 days ago1694525566IN
0x95c300e7...B2F9c3b89
0 MATIC0.00822404158.81435139
Transfer474000682023-09-11 4:59:02315 days ago1694408342IN
0x95c300e7...B2F9c3b89
0 MATIC0.005095697
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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)

000000000000000000000000177dad7fb9e03f0eda0940a3b3ad883313e4b525

-----Decoded View---------------
Arg [0] : _proxyTo (address): 0x177dAd7fB9E03f0EDa0940A3b3ad883313e4b525

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000177dad7fb9e03f0eda0940a3b3ad883313e4b525


Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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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.