Migrations

Unclassified

0x21ff3a6a9902...cbf244d9f57a

ByzantiumExact Bytecode MatchEdit this contract

Bytecode verified via sibling

This contract shares identical runtime bytecode with Migrations (0x2cad74e4...) which has been verified through compiler archaeology.

Deployed June 9, 2018 (8 years ago)Block 5,759,725

Full standard Truffle Migrations contract with `upgrade(address)`. Cluster of 19 identical deployments.

Byzantium EraVerified Source

Key Facts

Deployer

0x168498...8803bf

Deployment Block

5,759,725

Deployment Date

Jun 9, 2018, 03:40 PM

Code Size

572.0 B

Gas at Deploy

224,195

Deployment Transaction: 0xad733e9e1d109748...4cefcbdaa09ca982

Description

One of 19 identical deployments of the canonical Truffle Migrations contract. Public owner, uint public last_completed_migration; setCompleted(uint) and upgrade(address) gated by restricted modifier. Compiled with solc 0.4.24 optimizer ON runs=200. Exact code match; only trailing 34-byte Swarm metadata differs.

Source Verified

SolidityExact bytecode match(572 bytes)

Compiler: 0.4.24+

Cluster of 18 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

Opcodes572

Unique Opcodes104

Jump Instructions33

Storage Operations8

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan

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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