MATIC Price: $0.542506 (+1.54%)
Gas: 30.9 GWei
 
Transaction Hash
Method
Block
From
To
Approve594908902024-07-18 1:10:154 days ago1721265015IN
0x4257EA76...09fd72683
0 MATIC0.0014000347
Approve592817422024-07-12 19:35:549 days ago1720812954IN
0x4257EA76...09fd72683
0 MATIC0.0015535230.00000003
Withdraw592064302024-07-10 22:43:0211 days ago1720651382IN
0x4257EA76...09fd72683
0 MATIC0.0012794736.69475628
Approve591635962024-07-09 21:18:0712 days ago1720559887IN
0x4257EA76...09fd72683
0 MATIC0.0016038131
Approve590123932024-07-06 3:01:4516 days ago1720234905IN
0x4257EA76...09fd72683
0 MATIC0.0016885732.42778992
Approve589138692024-07-03 16:05:1918 days ago1720022719IN
0x4257EA76...09fd72683
0 MATIC0.0009234231
Transfer588746902024-07-02 16:20:2019 days ago1719937220IN
0x4257EA76...09fd72683
0 MATIC0.0015759630.00000006
Transfer588746582024-07-02 16:19:1219 days ago1719937152IN
0x4257EA76...09fd72683
0 MATIC0.0016760730.00000006
Approve585715362024-06-25 2:05:1327 days ago1719281113IN
0x4257EA76...09fd72683
0 MATIC0.0009532132
Approve585711942024-06-25 1:53:0527 days ago1719280385IN
0x4257EA76...09fd72683
0 MATIC0.0009532132
Approve576110412024-05-31 16:26:2951 days ago1717172789IN
0x4257EA76...09fd72683
0 MATIC0.0015535530.00066873
Approve575383642024-05-29 18:44:0853 days ago1717008248IN
0x4257EA76...09fd72683
0 MATIC0.00191637
Approve575253792024-05-29 10:43:0554 days ago1716979385IN
0x4257EA76...09fd72683
0 MATIC0.0021880442.25326543
Approve572468622024-05-22 4:32:1661 days ago1716352336IN
0x4257EA76...09fd72683
0 MATIC0.0078108150.0000171
Approve572299482024-05-21 17:28:2461 days ago1716312504IN
0x4257EA76...09fd72683
0 MATIC0.0022080942.40461823
Withdraw563326232024-04-28 1:52:4785 days ago1714269167IN
0x4257EA76...09fd72683
0 MATIC0.0028292771.32376412
Withdraw563326212024-04-28 1:52:4385 days ago1714269163IN
0x4257EA76...09fd72683
0 MATIC0.00819876272.86472782
Approve561810392024-04-24 0:53:2989 days ago1713920009IN
0x4257EA76...09fd72683
0 MATIC0.0034855967.29464385
Approve560615362024-04-20 22:47:4592 days ago1713653265IN
0x4257EA76...09fd72683
0 MATIC0.0022494243.24817266
Approve557953282024-04-14 1:56:1199 days ago1713059771IN
0x4257EA76...09fd72683
0 MATIC0.01078813207.17721335
Approve556810982024-04-10 23:19:08102 days ago1712791148IN
0x4257EA76...09fd72683
0 MATIC0.0034695267
Approve555986002024-04-08 18:49:24104 days ago1712602164IN
0x4257EA76...09fd72683
0 MATIC0.01105608212.32303803
Withdraw551641582024-03-28 4:47:19116 days ago1711601239IN
0x4257EA76...09fd72683
0 MATIC0.00387344111.08880716
Approve546061832024-03-13 11:03:41131 days ago1710327821IN
0x4257EA76...09fd72683
0 MATIC0.0050942398.3974352
Approve546061292024-03-13 11:01:47131 days ago1710327707IN
0x4257EA76...09fd72683
0 MATIC0.00701797135.71270662
View all transactions

Parent Transaction Hash Block From To
View All Internal Transactions
Loading...
Loading

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

4731:143:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;2192:44;2205:20;:18;:20::i;:::-;2227:8;;2192:44;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;30:3:-1;22:6;14;1:33;99:1;93:3;85:6;81:16;74:27;137:4;133:9;126:4;121:3;117:14;113:30;106:37;;169:3;161:6;157:16;147:26;;2192:44:0;;;;;;:12;:44::i;:::-;4731:143;;2094:44;2107:20;:18;:20::i;:::-;2129:8;;2094:44;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;30:3:-1;22:6;14;1:33;99:1;93:3;85:6;81:16;74:27;137:4;133:9;126:4;121:3;117:14;113:30;106:37;;169:3;161:6;157:16;147:26;;2094:44:0;;;;;;:12;:44::i;:::-;4731:143;2369:95;;5:9:-1;2:2;;;27:1;24;17:12;2:2;2369:95:0;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;3483:353;;5:9:-1;2:2;;;27:1;24;17:12;2:2;3483:353:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;3483:353:0;;;;;;;;;;;;;;;;;;;:::i;:::-;;1270:146;;5:9:-1;2:2;;;27:1;24;17:12;2:2;1270:146:0;;;:::i;:::-;;;;;;;;;;;;;;;;;;;2704:113;;5:9:-1;2:2;;;27:1;24;17:12;2:2;2704:113:0;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;3844:289;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;3844:289:0;;;;;;;;;;;;;;;;;;;;;27:11:-1;14;11:28;8:2;;;52:1;49;42:12;8:2;3844:289:0;;41:9:-1;34:4;18:14;14:25;11:40;8:2;;;64:1;61;54:12;8:2;3844:289:0;;;;;;100:9:-1;95:1;81:12;77:20;67:8;63:35;60:50;39:11;25:12;22:29;11:107;8:2;;;131:1;128;121:12;8:2;3844:289:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;30:3:-1;22:6;14;1:33;99:1;93:3;85:6;81:16;74:27;137:4;133:9;126:4;121:3;117:14;113:30;106:37;;169:3;161:6;157:16;147:26;;3844:289:0;;;;;;;;;;;;;;;:::i;:::-;;3067:232;;5:9:-1;2:2;;;27:1;24;17:12;2:2;3067:232:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;3067:232:0;;;;;;;;;;;;;;;;;;;:::i;:::-;;2825:234;2877:7;2897:13;2921:16;1797:47;;;;;;;;;;;;;;;;;;;2921:38;;3009:8;3003:15;2994:24;;3046:5;3039:12;;;;2825:234;:::o;366:896::-;733:1;713;684:9;678:16;654:4;643:9;639:20;616:4;591:5;584;580:17;549:200;775:16;824:4;818:11;866:4;863:1;858:3;843:28;1069:6;1098:1;1093:66;;;;1220:4;1215:3;1208:17;1093:66;1135:4;1130:3;1123:17;2369:95;2413:7;2440:16;:14;:16::i;:::-;2433:23;;2369:95;:::o;3483:353::-;2317:10;2297:30;;:16;:14;:16::i;:::-;:30;;;2289:52;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3598:3:::1;3575:27;;:11;:27;;;;3567:61;;;;;;;;;;;;;;;;;;;;;;;;;;;::::0;::::1;;;;;;;;;;;;;3647:23;3658:11;3647:10;:23::i;:::-;3639:73;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3756:20;:18;:20::i;:::-;3730:47;;3743:11;3730:47;;;;;;;;;;;;3798:30;3816:11;3798:17;:30::i;:::-;3483:353:::0;:::o;1270:146::-;1331:19;1407:1;1393:15;;1270:146;:::o;2704:113::-;2762:7;2789:20;:18;:20::i;:::-;2782:27;;2704:113;:::o;3844:289::-;2317:10;2297:30;;:16;:14;:16::i;:::-;:30;;;2289:52;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3948:33:::1;3969:11;3948:20;:33::i;:::-;3995:12;4009:23;4044:4;4036:18;;4062:9;4073:4;4036:42;;;;;;;;;;;;;36:153:-1;66:2;61:3;58:11;36:153;;182:3;176:10;171:3;164:23;98:2;93:3;89:12;82:19;;123:2;118:3;114:12;107:19;;148:2;143:3;139:12;132:19;;36:153;;;274:1;267:3;263:2;259:12;254:3;250:22;246:30;315:4;311:9;305:3;299:10;295:26;356:4;350:3;344:10;340:21;389:7;380;377:20;372:3;365:33;3:399;;;4036:42:0;;;;;;;;;;;;;;;;;;;;;;;;;12:1:-1;19;14:27;;;;67:4;61:11;56:16;;134:4;130:9;123:4;105:16;101:27;97:43;94:1;90:51;84:4;77:65;157:16;154:1;147:27;211:16;208:1;201:4;198:1;194:12;179:49;5:228;;14:27;32:4;27:9;;5:228;;3994:84:0;;;;4097:7;4113:10;4089:36;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;23:1:-1;8:100;33:3;30:1;27:10;8:100;;;99:1;94:3;90:11;84:18;80:1;75:3;71:11;64:39;52:2;49:1;45:10;40:15;;8:100;;;12:14;4089:36:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;2352:1;;3844:289:::0;;:::o;3067:232::-;2317:10;2297:30;;:16;:14;:16::i;:::-;:30;;;2289:52;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3178:1:::1;3158:22;;:8;:22;;;;3150:47;;;;;;;;;;;;;;;;;;;;;;;;;;;::::0;::::1;;;;;;;;;;;;;3213:44;3230:8;3240:16;:14;:16::i;:::-;3213:44;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3268:23;3282:8;3268:13;:23::i;:::-;3067:232:::0;:::o;2472:224::-;2520:7;2540:14;2565:16;1881:38;;;;;;;;;;;;;;;;;;;2565:29;;2645:8;2639:15;2629:25;;2682:6;2675:13;;;;2472:224;:::o;4340:274::-;4400:4;4440:1;4421:21;;:7;:21;;;4417:66;;;4466:5;4459:12;;;;4417:66;4495:12;4562:7;4550:20;4542:28;;4605:1;4598:4;:8;4591:15;;;4340:274;;;;:::o;4141:187::-;4208:16;1797:47;;;;;;;;;;;;;;;;;;;4208:38;;4298:11;4288:8;4281:29;4266:55;;:::o;3307:168::-;3367:16;1881:38;;;;;;;;;;;;;;;;;;;3367:29;;3448:8;3438;3431:26;3416:52;;:::o

Swarm Source

ipfs://41ef759422fabf085e8197d08185f4d0cdb3a0ab3423629d2271c1c06c720f06

Block Transaction Gas Used Reward
view all blocks produced

Block Uncle Number Difficulty Gas Used Reward
View All Uncles
Loading...
Loading
Loading...
Loading

Validator Index Block Amount
View All Withdrawals

Transaction Hash Block Value Eth2 PubKey Valid
View All Deposits
[ Download: CSV Export  ]

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.