Contract

Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta

Outline

• interface IERCProxy
•    - function proxyType()
•    - function implementation()
•    - function delegatedFwd(address _dst, b ...
•    - function proxyType()
•    - function implementation()
•  contract UpgradableProxy is Proxy
•    - function proxyOwner()
•    - function loadProxyOwner()
•    - function implementation()
•    - function loadImplementation()
•    - function transferProxyOwnership(addre ...
•    - function setProxyOwner(address newOwn ...
•    - function updateImplementation(address ...
•    - function updateAndCall(address _newPr ...
•    - function setImplementation(address _n ...
•    - function isContract(address _target)
•  contract UChildERC20Proxy is Upgra ... *

More Options

• Is this a proxy?
• Similar
• Submit Audit
• Compare

/**
 *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)
    {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"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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

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

ipfs://41ef759422fabf085e8197d08185f4d0cdb3a0ab3423629d2271c1c06c720f06