Migrations

Unclassified

0x0313c42342f7...9c94b4aa9a57

ByzantiumExact Bytecode MatchEdit this contract

Deployed September 10, 2018 (8 years ago)Block 6,306,090

Standard Truffle Migrations (unoptimized variant). Cluster of 19 identical deployments.

Byzantium EraVerified Source

Key Facts

Deployer

0x2a12ef...469da0

Deployment Block

6,306,090

Deployment Date

Sep 10, 2018, 12:46 PM

Code Size

760.0 B

Gas at Deploy

277,462

Transactions by Year

20182

Deployment Transaction: 0xda0ea77f1ae3f763...081ad701e6d59cf7

Description

One of 19 identical Truffle Migrations deployments compiled with solc 0.4.24 optimizer OFF. Public owner and last_completed_migration, restricted modifier, setCompleted(uint) and upgrade(address). Exact code match; only trailing 34-byte Swarm metadata differs.

Source Verified

SolidityExact bytecode match(760 bytes)

Compiler: 0.4.24+

Exact code match on 726 code bytes with solc 0.4.24 opt OFF. Cluster of 19 identical-runtime deployments. Etherscan-verified with EthereumHistory attribution.

Heuristic Analysis

The following characteristics were detected through bytecode analysis and may not be accurate.

Detected Type: Unclassified

Byzantium Era

First Metropolis hard fork. Added zk-SNARK precompiles, REVERT opcode, and staticcall.

Block span: 4,370,000 — 7,279,999

October 16, 2017 — February 28, 2019

Bytecode Overview

Opcodes760

Unique Opcodes89

Jump Instructions36

Storage Operations7

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
pragma solidity ^0.4.24;

contract Migrations {
  address public owner;
  uint public last_completed_migration;

  modifier restricted() {
    if (msg.sender == owner) _;
  }

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

  function setCompleted(uint completed) public restricted {
    last_completed_migration = completed;
  }

  function upgrade(address new_address) public restricted {
    Migrations upgraded = Migrations(new_address);
    upgraded.setCompleted(last_completed_migration);
  }
}

External Links

Etherscan Verified Source (if any)

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