SimpleStorage

Utility

0x07d39cea6fac...5cf809918e8d

FrontierContract #1,312Exact Bytecode MatchEdit this contract

Deployed September 19, 2015 (10 years ago)Block 258,392

The SimpleStorage tutorial contract with a log event added to its setter.

Frontier EraVerified Source

Historical Significance

The contract the Solidity documentation opens with, and for most readers of the period the first one they compiled. It teaches the one thing the EVM does that a script does not: a number written here survives the transaction that wrote it, is readable by anyone, and costs real money to change.

Context

Deployed in 2015 on the Ethereum Frontier network.

Key Facts

Deployer

0x046283...1141c2

Deployment Block

258,392

Deployment Date

Sep 19, 2015, 04:33 PM

Code Size

119.0 B

Gas at Deploy

49,095

Deployment Transaction: 0x50ce72a7c510f33b...a7b9b4efcc4deeae

Description

SimpleStorage is the contract the Solidity documentation opens with: one stored number, a set(uint256) and a get(). This version adds an event, log(uint256), fired from set before the write, which is how a 2015 developer watched a transaction land before there were block explorers that decoded storage. Source recovered by exact bytecode match: solc v0.1.1+commit.6ff4cd6 with the optimizer on reproduces all 119 bytes of the creation transaction.

Source Verified

Exact bytecode match(119 bytes)

Compiler: v0.1.1+

View verification proof

Heuristic Analysis

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

Detected Type: Utility

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

Opcodes119

Unique Opcodes61

Jump Instructions4

Storage Operations2

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan

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Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract SimpleStorage {
    uint storedData;
    event log(uint value);

    function set(uint x) {
        log(x);
        storedData = x;
    }

    function get() returns (uint) {
        return storedData;
    }
}