Utility Contracts

A HelloWorld greeter deployed at block 51,909 on 8 August 2015, one of a run of contracts from the same account that week.

A Greeter with the message 'Ethereum will change the world smarter' - deployed Aug 8, 2015 by a developer connected to the Tokyo Smart Contract meetup.

A 6-line contract storing a single public string, deployed Day 9 of Ethereum by a prolific early experimenter who shipped 18 contracts in one week.

The go-ethereum Contract Tutorial greeter, deployed with the greeting: Hello World!

The ethereum.org crowdsale tutorial, deployed on the ninth day of the public chain, with the funding goal, deadline and price fixed at construction.

A Frontier-era Greeter contract with the message: 'Hello World!'

A Frontier-era Greeter contract with the message: 'Life at all costs, life whatever it may be'

The go-ethereum Contract Tutorial greeter, deployed with the greeting: Welcome to Walmart I love you!

A coin flip on the block timestamp that pays double or keeps the stake

A coin flip settled on the parity of the block timestamp, with a size guard written the wrong way round so no bet can ever be placed.

A Frontier-era Greeter contract with the message: 'Hello Middle Earth!'

The ethereum.org crowdsale tutorial: contributions run to a deadline against a goal, pay out a separate reward token, and are refunded if the goal is missed.

A commit and reveal lottery from August 2015 with a ticket price of 0.1 ether and rounds 106 blocks long.

A commit and reveal lottery from August 2015 with a ticket price of 1 ether and rounds 106 blocks long.

A Frontier-era Greeter contract with the message: 'taras'

go-ethereum's built-in hash registrar, mapping a key to a content hash

A standalone mortal base contract

A Frontier-era Greeter with the message: 'Hello Eamonn'

A Frontier-era Greeter contract with the message: 'well hello there cc'

A Frontier-era Greeter contract with the message: 'Hello David!'

A factory for pre-ERC-20 standard tokens: one call deploys a token with a chosen supply and records it under the caller's address.

The go-ethereum Contract Tutorial greeter, deployed on 14 August 2015 with its greeting passed as a constructor argument.

A Frontier-era Greeter with the message: 'Dublin really rocks!'

A Frontier-era Greeter with the message: 'Hello World!'