Frontier Era

The library holding the Ethereum Alarm Clock's call database and payout accounting

The Relay from Piper Merriam's Ethereum Alarm Clock, created by the scheduler itself to forward one call at a time.

The first Ethereum Alarm Clock, a single contract holding the whole scheduling service

The first post-v0.9 release of Etheria, a fully on-chain hexagonal tile world and one of the earliest NFT projects on Ethereum, deployed October 22, 2015.

A balance accounting library with withdrawal safety, deployed 2015-10-22.

The first Ethereum Alarm Clock, redeployed four hours later against a new accounting library

The July 2015 ethereum.org crowdsale tutorial, with a fallback that reverts on every contribution.

An ordered index library for contract storage, deployed 22 October 2015.

An ordered index library for contract storage, deployed 22 October 2015.

An ordered index library for contract storage, deployed 22 October 2015.

The first contract on Ethereum mainnet to carry balanceOf, transfer and a Transfer event together, deployed 23 October 2015 with a supply of 1,000,000.

An Oraclize callback counter: it looks up the current Oraclize address and counts only the calls that arrive from it.

The same token code as 0x3C655ccb35666579511489af88153517fc58b017, redeployed the same afternoon with a supply of 1,000.

The October 2015 prototype where balances moved into a public balanceOf mapping, with a lower case balanceof function returning the same value.

Identical token code to 0xCAe62D22E8480b230d7aD93039167a0FfA7A2B8B, redeployed four minutes later with the same 200,000 supply. No transfer was ever made.

A balance accounting library with withdrawal safety, deployed 2015-10-23.

An ordered index library for contract storage, deployed 2015-10-23.

A string and bytes conversion library, deployed 2015-10-23.

A rotating pool of participants that turns over on a fixed schedule, held in a library

The library holding the Ethereum Alarm Clock's call database and payout accounting

The first scheduled-transaction service on Ethereum, enabling smart contracts to schedule future function calls—deployed by Piper Merriam in October 2015.

The hello-world of Solidity: multiply(x) returns x*7. The ethereum.org tutorial contract. 120 copies deployed Sep 2015 through Feb 2016.

The multiply contract that opens the go-ethereum Contract Tutorial, deployed with the author's own multiplier of 10 in place of 7.

A copy of the coin contract from the Frontier Guide where the contract was renamed but its constructor was not, leaving the supply function callable by anyone.