Store

Utility

0x791e7feb1859...18d49df8a790

FrontierContract #5,869Exact Bytecode MatchEdit this contract

Deployed January 1, 2016 (10 years ago)Block 781,069

A one slot bytes32 store from the first days of 2016 that logs who wrote to it.

Frontier EraVerified Source

Context

Deployed in 2015 on the Ethereum Frontier network.

Key Facts

Deployer

0x2a595f...677243

Deployment Block

781,069

Deployment Date

Jan 1, 2016, 12:43 PM

Code Size

150.0 B

Gas at Deploy

57,409

Transactions by Year

20162

Deployment Transaction: 0x95c39468e18f8e2e...16a3cb941ee02248

Description

One bytes32 in storage, a get() that returns it and a set(bytes32) that overwrites it and fires Set(address,bytes32) recording the caller and the new value. Anyone may write, so the storage slot holds only the most recent value while the event log holds the whole history and who wrote each entry. Source recovered by exact bytecode match: solc v0.1.1+commit.6ff4cd6 with the optimizer on reproduces all 150 bytes of the creation transaction.

Source Verified

Exact bytecode match(150 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

Opcodes150

Unique Opcodes65

Jump Instructions6

Storage Operations2

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract Store {
    bytes32 value;
    event Set(address sender, bytes32 value);

    function get() returns (bytes32) {
        return value;
    }

    function set(bytes32 newValue) {
        value = newValue;
        Set(msg.sender, newValue);
    }
}