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Contract

0x657b95d5bbD9e8CBcF02F75E8454b267a4D4aa06
 

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Method
Block
From
To
Execute177028612023-07-16 2:20:35968 days ago1689474035IN
0x657b95d5...7a4D4aa06
0 ETH0.002257615.68946548
Execute177028582023-07-16 2:19:59968 days ago1689473999IN
0x657b95d5...7a4D4aa06
0 ETH0.0022130115.37956901
Execute177028532023-07-16 2:18:59968 days ago1689473939IN
0x657b95d5...7a4D4aa06
0 ETH0.0022736515.80098115
Execute177028322023-07-16 2:14:35968 days ago1689473675IN
0x657b95d5...7a4D4aa06
0 ETH0.0021647615.04424483
Execute177027722023-07-16 2:02:11968 days ago1689472931IN
0x657b95d5...7a4D4aa06
0 ETH0.002603115.54925727
Execute117254452021-01-25 14:30:251869 days ago1611585025IN
0x657b95d5...7a4D4aa06
0 ETH0.02101629111
Execute117254352021-01-25 14:28:041869 days ago1611584884IN
0x657b95d5...7a4D4aa06
0 ETH0.02528335111
Execute117216032021-01-25 0:32:171870 days ago1611534737IN
0x657b95d5...7a4D4aa06
1.1 ETH0.0709119222
Execute117206132021-01-24 20:57:111870 days ago1611521831IN
0x657b95d5...7a4D4aa06
0 ETH0.0223517785
Execute116861992021-01-19 14:11:271875 days ago1611065487IN
0x657b95d5...7a4D4aa06
0 ETH0.02919011111
Execute116429982021-01-12 22:49:191882 days ago1610491759IN
0x657b95d5...7a4D4aa06
0.7 ETH0.0329588899
Execute116429882021-01-12 22:47:221882 days ago1610491642IN
0x657b95d5...7a4D4aa06
3.1354 ETH0.036094899
Execute116417642021-01-12 18:19:551882 days ago1610475595IN
0x657b95d5...7a4D4aa06
1.9 ETH0.0330976899
Execute116398092021-01-12 11:22:091883 days ago1610450529IN
0x657b95d5...7a4D4aa06
1.99 ETH0.0330586799
Execute116333842021-01-11 11:38:541884 days ago1610365134IN
0x657b95d5...7a4D4aa06
0 ETH0.0212119399
Execute116306342021-01-11 1:31:051884 days ago1610328665IN
0x657b95d5...7a4D4aa06
0 ETH0.02580177106
Execute116114812021-01-08 3:05:091887 days ago1610075109IN
0x657b95d5...7a4D4aa06
0 ETH0.0518742300
Execute116023722021-01-06 17:23:221888 days ago1609953802IN
0x657b95d5...7a4D4aa06
0 ETH0.04070978190
Execute116023412021-01-06 17:16:161888 days ago1609953376IN
0x657b95d5...7a4D4aa06
0 ETH0.04381434180
Execute116023202021-01-06 17:10:531888 days ago1609953053IN
0x657b95d5...7a4D4aa06
0 ETH0.04381434180
Execute115965132021-01-05 19:43:431889 days ago1609875823IN
0x657b95d5...7a4D4aa06
2.5 ETH0.0666916200
Execute115964772021-01-05 19:37:291889 days ago1609875449IN
0x657b95d5...7a4D4aa06
3 ETH0.0667742200
Execute115914772021-01-05 1:10:351890 days ago1609809035IN
0x657b95d5...7a4D4aa06
0.3 ETH0.09965729299
Execute115914722021-01-05 1:09:261890 days ago1609808966IN
0x657b95d5...7a4D4aa06
1.2 ETH0.03696134288
Execute115914532021-01-05 1:06:291890 days ago1609808789IN
0x657b95d5...7a4D4aa06
3.2 ETH0.09221903289
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Latest 25 internal transactions (View All)

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-117216032021-01-25 0:32:171870 days ago1611534737
0x657b95d5...7a4D4aa06
1.1 ETH
-116429982021-01-12 22:49:191882 days ago1610491759
0x657b95d5...7a4D4aa06
0.7 ETH
-116429882021-01-12 22:47:221882 days ago1610491642
0x657b95d5...7a4D4aa06
3.1354 ETH
-116417642021-01-12 18:19:551882 days ago1610475595
0x657b95d5...7a4D4aa06
1.9 ETH
-116398092021-01-12 11:22:091883 days ago1610450529
0x657b95d5...7a4D4aa06
1.99 ETH
-116333842021-01-11 11:38:541884 days ago1610365134
0x657b95d5...7a4D4aa06
2.5 ETH
-116333842021-01-11 11:38:541884 days ago1610365134
0x657b95d5...7a4D4aa06
2.5 ETH
-116306342021-01-11 1:31:051884 days ago1610328665
0x657b95d5...7a4D4aa06
6.6 ETH
-116306342021-01-11 1:31:051884 days ago1610328665
0x657b95d5...7a4D4aa06
6.6 ETH
-116023722021-01-06 17:23:221888 days ago1609953802
0x657b95d5...7a4D4aa06
2.5 ETH
-116023722021-01-06 17:23:221888 days ago1609953802
0x657b95d5...7a4D4aa06
2.5 ETH
-116023412021-01-06 17:16:161888 days ago1609953376
0x657b95d5...7a4D4aa06
6 ETH
-116023412021-01-06 17:16:161888 days ago1609953376
0x657b95d5...7a4D4aa06
6 ETH
-116023202021-01-06 17:10:531888 days ago1609953053
0x657b95d5...7a4D4aa06
5 ETH
-116023202021-01-06 17:10:531888 days ago1609953053
0x657b95d5...7a4D4aa06
5 ETH
-115965132021-01-05 19:43:431889 days ago1609875823
0x657b95d5...7a4D4aa06
2.5 ETH
-115964772021-01-05 19:37:291889 days ago1609875449
0x657b95d5...7a4D4aa06
3 ETH
-115914772021-01-05 1:10:351890 days ago1609809035
0x657b95d5...7a4D4aa06
0.3 ETH
-115914722021-01-05 1:09:261890 days ago1609808966
0x657b95d5...7a4D4aa06
1.2 ETH
-115914532021-01-05 1:06:291890 days ago1609808789
0x657b95d5...7a4D4aa06
3.2 ETH
-115912732021-01-05 0:26:061890 days ago1609806366
0x657b95d5...7a4D4aa06
2 ETH
-115900622021-01-04 20:06:421890 days ago1609790802
0x657b95d5...7a4D4aa06
2 ETH
-115900362021-01-04 20:02:001890 days ago1609790520
0x657b95d5...7a4D4aa06
2 ETH
-115899242021-01-04 19:36:281890 days ago1609788988
0x657b95d5...7a4D4aa06
3.5 ETH
-115899172021-01-04 19:33:271890 days ago1609788807
0x657b95d5...7a4D4aa06
5.5 ETH
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x9b4b52c0...033898a40
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
DSProxy

Compiler Version
v0.6.7+commit.b8d736ae

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2020-10-25
*/

pragma solidity >=0.6.7;

// 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/>.

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

abstract 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_)
        virtual
        public
        auth
    {
        owner = owner_;
        emit LogSetOwner(owner);
    }

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

    modifier auth {
        require(isAuthorized(msg.sender, msg.sig), "ds-auth-unauthorized");
        _;
    }

    function isAuthorized(address src, bytes4 sig) virtual 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, address(this), sig);
        }
    }
}

/// note.sol -- the `note' modifier, for logging calls as events

// 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/>.

contract DSNote {
    event LogNote(
        bytes4   indexed  sig,
        address  indexed  guy,
        bytes32  indexed  foo,
        bytes32  indexed  bar,
        uint256           wad,
        bytes             fax
    ) anonymous;

    modifier note {
        bytes32 foo;
        bytes32 bar;
        uint256 wad;

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

        _;

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

// 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/>.

// 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 {
        setCache(_cacheAddr);
    }

    receive() external payable {
    }

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

        response = execute(target, _data);
    }

    function execute(address _target, bytes memory _data)
        public
        auth
        note
        payable
        returns (bytes memory response)
    {
        require(_target != address(0), "ds-proxy-target-address-required");

        // call contract in current context
        assembly {
            let succeeded := delegatecall(sub(gas(), 5000), _target, add(_data, 0x20), mload(_data), 0, 0)
            let size := returndatasize()

            response := mload(0x40)
            mstore(0x40, add(response, and(add(add(size, 0x20), 0x1f), not(0x1f))))
            mstore(response, size)
            returndatacopy(add(response, 0x20), 0, size)

            switch iszero(succeeded)
            case 1 {
                // throw if delegatecall failed
                revert(add(response, 0x20), size)
            }
        }
    }

    //set new cache
    function setCache(address _cacheAddr)
        public
        auth
        note
        returns (bool)
    {
        require(_cacheAddr != address(0), "ds-proxy-cache-address-required");
        cache = DSProxyCache(_cacheAddr);  // overwrite cache
        return 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 memory _code) public view returns (address) {
        bytes32 hash = keccak256(_code);
        return cache[hash];
    }

    function write(bytes memory _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

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

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Swarm Source

ipfs://0afecdf1ed303a7f4e99eef15a66cf7153c38fd85a0314120c8aa264fd966f45

Block Uncle Number Difficulty Gas Used Reward
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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.