Info

Experimental

0xef550c2f1f88...67c5d5ff98bc

FrontierContract #342Exact Bytecode MatchEdit this contract

Deployed August 20, 2015 (11 years ago)Block 116,135

A 280-byte contract that exposes one stored number through info() and can be destroyed by its deployer via kill().

Frontier EraVerified Source

Historical Significance

The mortal base is the owner-guarded suicide pattern that nearly every 2015 contract inherited, here wrapped around a single read-only value. Contracts shaped like this are the minimum viable deployment: one piece of state to look at and one way to clean up afterwards, which is what the chain was mostly used for in its first year.

Context

Deployed 2015-08-20 by 0xc876c021ece519a8cb7d3d1b8eea2d1cee9929ba. Two byte-identical copies of this runtime exist. Source recovered by exact runtime bytecode match, verified on Sourcify and Etherscan.

Key Facts

Deployer

0xc876c0...9929ba

Deployment Block

116,135

Deployment Date

Aug 20, 2015, 11:08 AM

Code Size

797.0 B

Gas at Deploy

275,573

Deployment Transaction: 0xbc87bac0de1e05fd...bee0b6f5f7d8f951

Description

Two contracts in one file. The base, mortal, records the deployer in storage slot 0 and exposes kill(), which calls suicide(owner) only for that address. Info inherits it and adds a single private uint in slot 1, returned by info() at selector 0x370158ea. Nothing in the contract ever writes that uint, so info() returns zero for the life of the contract unless the value was set in the constructor, which leaves no trace in the deployed runtime.

Source Verified

SolidityExact bytecode match(797 bytes)

Compiler: v0.1.3+

View verification proof

Heuristic Analysis

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

Detected Type: Experimental

Contains SELFDESTRUCT opcode

Frontier Era

The initial release of Ethereum. A bare-bones implementation for technical users.

Block span: 0 — 1,149,999

July 30, 2015 — March 14, 2016

Bytecode Overview

Opcodes797

Unique Opcodes63

Jump Instructions22

Storage Operations14

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan Verified on Sourcify

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract mortal {
    address owner;
    function mortal() { owner = msg.sender; }
    function kill() { if (msg.sender == owner) suicide(owner); }
}

contract Info is mortal {
    uint data;
    function info() constant returns (uint) {
        return data;
    }
}