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Contract

0x45a8d860E9e2171b867cAF797886C8e4881476E2
 

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118010432021-02-06 6:04:231404 days ago1612591463
DSProxy #188,043
2.56848691 ETH
118010432021-02-06 6:04:231404 days ago1612591463
DSProxy #188,043
2.56848691 ETH
117577462021-01-30 14:07:581411 days ago1612015678
DSProxy #188,043
0.55 ETH
117577462021-01-30 14:07:581411 days ago1612015678
DSProxy #188,043
0.55 ETH
117408742021-01-27 23:41:441414 days ago1611790904
DSProxy #188,043
0.4 ETH
117408742021-01-27 23:41:441414 days ago1611790904
DSProxy #188,043
0.4 ETH
117244982021-01-25 11:13:401416 days ago1611573220
DSProxy #188,043
0.5 ETH
117244982021-01-25 11:13:401416 days ago1611573220
DSProxy #188,043
0.5 ETH
117104992021-01-23 7:32:461418 days ago1611387166
DSProxy #188,043
0.86597182 ETH
117104992021-01-23 7:32:461418 days ago1611387166
DSProxy #188,043
0.86597182 ETH
117104372021-01-23 7:20:531418 days ago1611386453
DSProxy #188,043
0.2 ETH
117104372021-01-23 7:20:531418 days ago1611386453
DSProxy #188,043
0.2 ETH
117035002021-01-22 5:43:111419 days ago1611294191
DSProxy #188,043
0.84336534 ETH
117035002021-01-22 5:43:111419 days ago1611294191
DSProxy #188,043
0.84336534 ETH
117023232021-01-22 1:10:571420 days ago1611277857
DSProxy #188,043
1 ETH
117017002021-01-21 23:05:051420 days ago1611270305
DSProxy #188,043
0.15 ETH
116962872021-01-21 3:02:361420 days ago1611198156
DSProxy #188,043
0.3 ETH
116952992021-01-20 23:18:541421 days ago1611184734
DSProxy #188,043
0.007791 ETH
116952992021-01-20 23:18:541421 days ago1611184734
DSProxy #188,043
0.96475356 ETH
116952992021-01-20 23:18:541421 days ago1611184734
DSProxy #188,043
0.96769356 ETH
116952992021-01-20 23:18:541421 days ago1611184734
DSProxy #188,043
0.004851 ETH
116952992021-01-20 23:18:541421 days ago1611184734
DSProxy #188,043
0.007791 ETH
116920592021-01-20 11:37:451421 days ago1611142665
DSProxy #188,043
0.2 ETH
116918942021-01-20 11:05:001421 days ago1611140700
DSProxy #188,043
0.8 ETH
116917502021-01-20 10:33:071421 days ago1611138787
DSProxy #188,043
0.08 ETH
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x2B9B8b83...8ff54a8AC
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
DSProxy

Compiler Version
v0.4.23+commit.124ca40d

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-09-06
*/

// proxy.sol - execute actions atomically through the proxy's identity

// Copyright (C) 2017  DappHub, LLC

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.4.23;

contract DSAuthority {
    function canCall(
        address src, address dst, bytes4 sig
    ) public view returns (bool);
}

contract DSAuthEvents {
    event LogSetAuthority (address indexed authority);
    event LogSetOwner     (address indexed owner);
}

contract DSAuth is DSAuthEvents {
    DSAuthority  public  authority;
    address      public  owner;

    constructor() public {
        owner = msg.sender;
        emit LogSetOwner(msg.sender);
    }

    function setOwner(address owner_)
        public
        auth
    {
        owner = owner_;
        emit LogSetOwner(owner);
    }

    function setAuthority(DSAuthority authority_)
        public
        auth
    {
        authority = authority_;
        emit LogSetAuthority(authority);
    }

    modifier auth {
        require(isAuthorized(msg.sender, msg.sig));
        _;
    }

    function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
        if (src == address(this)) {
            return true;
        } else if (src == owner) {
            return true;
        } else if (authority == DSAuthority(0)) {
            return false;
        } else {
            return authority.canCall(src, this, sig);
        }
    }
}

contract DSNote {
    event LogNote(
        bytes4   indexed  sig,
        address  indexed  guy,
        bytes32  indexed  foo,
        bytes32  indexed  bar,
        uint              wad,
        bytes             fax
    ) anonymous;

    modifier note {
        bytes32 foo;
        bytes32 bar;

        assembly {
            foo := calldataload(4)
            bar := calldataload(36)
        }

        emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);

        _;
    }
}

// DSProxy
// Allows code execution using a persistant identity This can be very
// useful to execute a sequence of atomic actions. Since the owner of
// the proxy can be changed, this allows for dynamic ownership models
// i.e. a multisig
contract DSProxy is DSAuth, DSNote {
    DSProxyCache public cache;  // global cache for contracts

    constructor(address _cacheAddr) public {
        require(setCache(_cacheAddr));
    }

    function() public payable {
    }

    // use the proxy to execute calldata _data on contract _code
    function execute(bytes _code, bytes _data)
        public
        payable
        returns (address target, bytes32 response)
    {
        target = cache.read(_code);
        if (target == 0x0) {
            // deploy contract & store its address in cache
            target = cache.write(_code);
        }

        response = execute(target, _data);
    }

    function execute(address _target, bytes _data)
        public
        auth
        note
        payable
        returns (bytes32 response)
    {
        require(_target != 0x0);

        // call contract in current context
        assembly {
            let succeeded := delegatecall(sub(gas, 5000), _target, add(_data, 0x20), mload(_data), 0, 32)
            response := mload(0)      // load delegatecall output
            switch iszero(succeeded)
            case 1 {
                // throw if delegatecall failed
                revert(0, 0)
            }
        }
    }

    //set new cache
    function setCache(address _cacheAddr)
        public
        auth
        note
        returns (bool)
    {
        require(_cacheAddr != 0x0);        // invalid cache address
        cache = DSProxyCache(_cacheAddr);  // overwrite cache
        return true;
    }
}

// DSProxyFactory
// This factory deploys new proxy instances through build()
// Deployed proxy addresses are logged
contract DSProxyFactory {
    event Created(address indexed sender, address indexed owner, address proxy, address cache);
    mapping(address=>bool) public isProxy;
    DSProxyCache public cache = new DSProxyCache();

    // deploys a new proxy instance
    // sets owner of proxy to caller
    function build() public returns (DSProxy proxy) {
        proxy = build(msg.sender);
    }

    // deploys a new proxy instance
    // sets custom owner of proxy
    function build(address owner) public returns (DSProxy proxy) {
        proxy = new DSProxy(cache);
        emit Created(msg.sender, owner, address(proxy), address(cache));
        proxy.setOwner(owner);
        isProxy[proxy] = true;
    }
}

// DSProxyCache
// This global cache stores addresses of contracts previously deployed
// by a proxy. This saves gas from repeat deployment of the same
// contracts and eliminates blockchain bloat.

// By default, all proxies deployed from the same factory store
// contracts in the same cache. The cache a proxy instance uses can be
// changed.  The cache uses the sha3 hash of a contract's bytecode to
// lookup the address
contract DSProxyCache {
    mapping(bytes32 => address) cache;

    function read(bytes _code) public view returns (address) {
        bytes32 hash = keccak256(_code);
        return cache[hash];
    }

    function write(bytes _code) public returns (address target) {
        assembly {
            target := create(0, add(_code, 0x20), mload(_code))
            switch iszero(extcodesize(target))
            case 1 {
                // throw if contract failed to deploy
                revert(0, 0)
            }
        }
        bytes32 hash = keccak256(_code);
        cache[hash] = target;
    }
}

Contract Security Audit

Contract ABI

[{"constant":false,"inputs":[{"name":"owner_","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_target","type":"address"},{"name":"_data","type":"bytes"}],"name":"execute","outputs":[{"name":"response","type":"bytes32"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"_code","type":"bytes"},{"name":"_data","type":"bytes"}],"name":"execute","outputs":[{"name":"target","type":"address"},{"name":"response","type":"bytes32"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"cache","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"authority_","type":"address"}],"name":"setAuthority","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_cacheAddr","type":"address"}],"name":"setCache","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"authority","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_cacheAddr","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"authority","type":"address"}],"name":"LogSetAuthority","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"}],"name":"LogSetOwner","type":"event"}]

Deployed Bytecode

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

Swarm Source

bzzr://e498874c9ba9e75028e0c84f1b1d83b2dad5de910c59b837b32e5a190794c5e1

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OVERVIEW

The proxy contract address for 0xffcd4e54ada433f28acdd933c39bf80c5e2be5d9.

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