0x21e0...f15c

Utility

0x21e0c646be39...5492b184f15c

FrontierContract #3,227Exact Bytecode MatchEdit this contract

Deployed November 2, 2015 (10 years ago)Block 480,347

The multiply-by-seven example from the JSON-RPC documentation

Frontier EraVerified Source

Historical Significance

The contract the JSON-RPC and web3 documentation used to demonstrate a call, which makes it a fixture rather than an application: it exists so that a reader can watch ABI encoding, eth_call and the return value work. Copies of it on mainnet mark the point where someone got a client talking to the chain for the first time.

Context

Deployed in November 2015 on the Frontier chain, with a compiler that was already a year out of date by then.

Key Facts

Deployer

0xc4d227...3e548f

Deployment Block

480,347

Deployment Date

Nov 2, 2015, 09:32 PM

Code Size

94.0 B

Gas at Deploy

41,524

Deployment Transaction: 0xfb4b286af34e833c...d3424a0f5ac5652e

Description

One function that takes a number and returns it multiplied by seven. It is the contract the Ethereum JSON-RPC and web3 documentation used to demonstrate eth_call and ABI encoding, so it exists to be called rather than to do anything. This deployment was produced by the PoC-8 era cpp-ethereum compiler, which reports itself as version 0.8.2 and emits a twelve byte constructor prologue with no memory pointer setup, so Etherscan has no compiler that can verify it.

Source Verified

Exact bytecode match(94 bytes)

Compiler: cpp-eth

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

Opcodes94

Unique Opcodes31

Jump Instructions6

Storage Operations0

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract Multiply7 {
    function multiply(uint input) constant returns (uint) {
        return input * 7;
    }
}

External Links

Etherscan Verified Source (if any)

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