POL Price: $0.327069 (+6.36%)
Gas: 53.2 GWei
 

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Block
From
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Approve678352852025-02-12 12:57:5614 hrs ago1739365076IN
0x0A307BD5...DC998daDB
0 POL0.0009875733.15337817
Approve660769612024-12-29 21:00:5645 days ago1735506056IN
0x0A307BD5...DC998daDB
0 POL0.0013865246.54650004
Approve651070012024-12-05 8:50:5069 days ago1733388650IN
0x0A307BD5...DC998daDB
0 POL0.0070866136.09239699
Approve649752042024-12-02 1:48:0173 days ago1733104081IN
0x0A307BD5...DC998daDB
0 POL0.0024035680.68894269
Approve649478032024-12-01 9:16:3073 days ago1733044590IN
0x0A307BD5...DC998daDB
0 POL0.0011277337.85883663
Approve647684232024-11-26 22:04:2778 days ago1732658667IN
0x0A307BD5...DC998daDB
0 POL0.0030255795.17981407
Transfer646744982024-11-24 12:28:0280 days ago1732451282IN
0x0A307BD5...DC998daDB
0 POL0.0036937870.41146746
Approve644151582024-11-18 1:09:3387 days ago1731892173IN
0x0A307BD5...DC998daDB
0 POL0.0017819834.22159916
Approve643792822024-11-17 3:32:0287 days ago1731814322IN
0x0A307BD5...DC998daDB
0 POL0.0016803656.41096071
Approve639444112024-11-06 6:29:5198 days ago1730874591IN
0x0A307BD5...DC998daDB
0 POL0.01725187579.15507056
Approve629014502024-10-11 9:52:35124 days ago1728640355IN
0x0A307BD5...DC998daDB
0 POL0.00454815152.6841936
Approve628344942024-10-09 18:10:48126 days ago1728497448IN
0x0A307BD5...DC998daDB
0 POL0.000956232.10039529
Approve628110092024-10-09 4:16:48126 days ago1728447408IN
0x0A307BD5...DC998daDB
0 POL0.0011268837.83
Approve625233212024-10-02 1:43:16134 days ago1727833396IN
0x0A307BD5...DC998daDB
0 POL0.0009481131.82887836
Approve625036842024-10-01 14:03:40134 days ago1727791420IN
0x0A307BD5...DC998daDB
0 POL0.0010413934.96019638
Approve625030542024-10-01 13:41:10134 days ago1727790070IN
0x0A307BD5...DC998daDB
0 POL0.0010723636.00001153
Approve624326092024-09-29 19:57:37136 days ago1727639857IN
0x0A307BD5...DC998daDB
0 POL0.0008936430.00000004
Approve623848712024-09-28 15:41:42137 days ago1727538102IN
0x0A307BD5...DC998daDB
0 POL0.0010723636.00000003
Approve623456972024-09-27 16:25:40138 days ago1727454340IN
0x0A307BD5...DC998daDB
0 POL0.0008941530.01714319
Approve623272172024-09-27 5:30:08138 days ago1727415008IN
0x0A307BD5...DC998daDB
0 POL0.0009839833.03300002
Approve603362162024-08-08 10:30:27188 days ago1723113027IN
0x0A307BD5...DC998daDB
0 POL0.001489450
Approve599796222024-07-30 7:04:48197 days ago1722323088IN
0x0A307BD5...DC998daDB
0 POL0.003905475
Approve598762042024-07-27 15:43:21200 days ago1722095001IN
0x0A307BD5...DC998daDB
0 POL0.0015621630.00000003
Approve596754812024-07-22 15:26:59205 days ago1721662019IN
0x0A307BD5...DC998daDB
0 POL0.001489450
Approve585339862024-06-24 3:26:48233 days ago1719199608IN
0x0A307BD5...DC998daDB
0 POL0.0010172132
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x7d3fA4bA...a97bBF313
The constructor portion of the code might be different and could alter the actual behaviour of the contract

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 2021-06-09
*/

// 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"}]

Deployed Bytecode

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Deployed Bytecode Sourcemap

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Swarm Source

ipfs://41ef759422fabf085e8197d08185f4d0cdb3a0ab3423629d2271c1c06c720f06

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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.