greeter

Experimental

0xaa159b9af634...f12bd6f58772

FrontierContract #4,054Exact Bytecode MatchEdit this contract

Deployed November 19, 2015 (10 years ago)Block 566,563

The classic Ethereum Hello World contract. mortal base with kill(), greeter with greet(). One of 111 identical deployments.

Frontier EraVerified Source

Historical Significance

The canonical first contract for Ethereum developers. The mortal + greeter pattern taught inheritance, constructors, and selfdestruct.

Key Facts

Deployer

0xbcdfbc...25ab59

Deployment Block

566,563

Deployment Date

Nov 19, 2015, 08:58 PM

Code Size

670.0 B

Gas at Deploy

173,298

Deployment Transaction: 0x9db8931e6bd8ed72...0c473b511ee2911c

Description

The Greeter is Ethereum's Hello World - the first contract most developers deployed from the official tutorials. It inherits from mortal (which provides kill/selfdestruct) and stores a greeting string set at construction.

111 identical deployments of this bytecode exist, representing the wave of developers who followed the tutorial and deployed their own Greeter.

Source Verified

SolidityExact bytecode match(670 bytes)

Compiler: v0.2.1

View verification proof

Exact runtime bytecode match. Native C++ solc v0.2.1 (webthree-umbrella v1.1.2), optimizer ON. 111 identical siblings.

Historian Categories

Experimental

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

Opcodes670

Unique Opcodes81

Jump Instructions25

Storage Operations13

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan

View Verification Proof

Show source code (Solidity)

contract mortal {
    address owner;
    function mortal() { owner = msg.sender; }
    function kill() { if (msg.sender == owner) suicide(owner); }
}

contract greeter is mortal {
    string greeting;
    function greeter(string _greeting) public {
        greeting = _greeting;
    }
    function greet() constant returns (string) {
        return greeting;
    }
}

External Links

Etherscan Verified Source (if any)

Related contracts

Digix

Same era

The earliest known attempt to deploy a smart contract on Ethereum mainnet (Aug 7 2015, thanateros.eth). Ran out of gas before code deposit; creation bytecode reconstructed exactly.

0x9a049f...a977a0August 7, 2015

Test

Same era

The earliest known Ethereum contract with executable runtime code. A single function go() that returns the string "eth", compiled with the first publicly available Solidity compiler (v0.1.1).

0x651629...8c21faAugust 7, 2015

Greeter

Same era

An early Ethereum contract that returns the string “Hello World!” when called.

0xfea8c4...8b08ebAugust 7, 2015

Greeter

Same era

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

0xd464e6...dc98f3August 7, 2015

Greeter

Same era

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

0xf91486...63ea50August 7, 2015

Greeter

Same era

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

0x3dbdee...5658a9August 7, 2015