Multiply7

Experimental

0xfcb20ae9a3fa...b0643fb96d3f

FrontierContract #134Exact Bytecode MatchEdit this contract

Deployed August 10, 2015 (11 years ago)Block 63,886

The Multiply7 tutorial contract — one of the first Solidity examples ever deployed to mainnet.

Frontier EraVerified Source

Historical Significance

One of the earliest tutorial contracts on Ethereum mainnet, deployed during the first week of Frontier (Day 3). Represents the Solidity learning journey of the earliest Ethereum developers.

Key Facts

Deployer

0xc70ba2...af62e9

Deployment Block

63,886

Deployment Date

Aug 10, 2015, 01:04 PM

Code Size

126.0 B

Gas at Deploy

49,243

Deployment Transaction: 0xd32f489c11ba4c03...c50871f485e0a237

Description

A deployment of the canonical Multiply7 tutorial contract from the official Solidity documentation. This single-function contract multiplies any input by 7, and served as the introductory example for developers learning Solidity in the earliest days of Ethereum. Deployed on August 10, 2015 — just 3 days after Ethereum mainnet launched — by an early experimenter (0xc70ba22f) who deployed 11 contracts in the Frontier era, including gambling variants and token experiments.

Source Verified

SolidityExact bytecode match(126 bytes)

Compiler: soljson

View verification proof

Exact creation bytecode match (126 bytes). Compiled with soljson v0.1.1 (commit 6ff4cd6), optimizer OFF. Tutorial contract from official Solidity documentation, deployed Day 3 of Ethereum mainnet.

Historian Categories

Experimental

Heuristic Analysis

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

Detected Type: Experimental

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

Opcodes126

Unique Opcodes36

Jump Instructions6

Storage Operations1

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan

View Verification Proof

Show source code (Solidity)

contract Multiply7 {
    function multiply(uint input) constant returns (uint) {
        return input * 7;
    }
}

External Links

Etherscan Verified Source (if any)

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