Migrations

Unclassified

0x2327a72c73bf...702b2b24e62d

ByzantiumExact Bytecode MatchEdit this contract

Bytecode verified via sibling

This contract shares identical runtime bytecode with Migrations (0xdbdb511a...) which has been verified through compiler archaeology.

Deployed June 13, 2018 (8 years ago)Block 5,782,602

Truffle Migrations contract (trimmed variant) — tracks the last completed migration index in `lastCompletedMigration`, restricted to the deployer. Cluster of 6 identical deployments.

Byzantium EraVerified Source

Key Facts

Deployer

0xb1f919...03df25

Deployment Block

5,782,602

Deployment Date

Jun 13, 2018, 04:39 PM

Code Size

293.0 B

Gas at Deploy

155,408

Deployment Transaction: 0x7efc2f7a120f8cc7...73ff1efcc0466741

Description

One of 6 identical deployments of the Truffle Migrations helper. Two slots: internal address owner (set in constructor) and public uint lastCompletedMigration. A single mutation setCompleted(uint completed) restricted writes the migration index, guarded by a modifier requiring msg.sender == owner. This variant omits the standard upgrade(address) helper. Compiled with solc 0.4.18 optimizer OFF. Exact code match; only trailing 34-byte Swarm metadata differs.

Source Verified

SolidityExact bytecode match(293 bytes)

Compiler: 0.4.18+

Exact code match on 259 code bytes with solc 0.4.18 opt OFF. Only trailing 34-byte Swarm metadata differs. 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

Opcodes293

Unique Opcodes84

Jump Instructions16

Storage Operations4

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
pragma solidity ^0.4.0;

contract Migrations {
  address owner;
  uint public lastCompletedMigration;

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

  function Migrations() {
    owner = msg.sender;
  }

  function setCompleted(uint completed) restricted {
    lastCompletedMigration = completed;
  }
}

External Links

Etherscan Verified Source (if any)

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