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Gas: 31 Gwei
 

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Transaction Hash
Method
Block
From
To
Value
0x60806040161615662022-12-11 12:48:11354 days 14 hrs ago1670762891IN
 Create: Verifier3
0 ETH0.0053737212

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Contract Source Code Verified (Exact Match)

Contract Name:
Verifier3

Compiler Version
v0.8.17+commit.8df45f5f

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, None license
/**
 *Submitted for verification at Etherscan.io on 2022-12-11
*/

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

interface IVerifier {
    function verify(bytes memory flag) external returns(bool);
}

contract Verifier3 {
    address public alice;
    IVerifier _verifier;
    address _target;
    uint value = 0x66;

    constructor(address verifier, address target) {
        _verifier = IVerifier(verifier);
        _target = target;
    }

    function verify(bytes memory flag) external returns(bool){
        uint size = getSize(_target);
        require(uint(uint8(flag[2])) == size-265);
        return _verifier.verify(flag);
    }

    function getSize(address _addr) internal returns (uint) {
        uint32 size;
        assembly {
            size := extcodesize(_addr)
        }
        return size;
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"verifier","type":"address"},{"internalType":"address","name":"target","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"alice","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"flag","type":"bytes"}],"name":"verify","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000010a29fca0d0661f8bce563eb8bec5e0bcf5291010000000000000000000000009e69f292f83ed4145ed87ea21f55beff37342781

-----Decoded View---------------
Arg [0] : verifier (address): 0x10a29fCA0D0661f8bCe563EB8beC5e0BCf529101
Arg [1] : target (address): 0x9e69f292F83ED4145ed87EA21f55BefF37342781

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000010a29fca0d0661f8bce563eb8bec5e0bcf529101
Arg [1] : 0000000000000000000000009e69f292f83ed4145ed87ea21f55beff37342781


Deployed Bytecode Sourcemap

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Swarm Source

ipfs://48f0029e233d6c13c02e8febbb3c4de34fd6d08a3191b078204f741ee552d7b9

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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.