Frontier Era

On-chain lottery from October 2015. Players buy tickets (1-25+ ETH with bulk discounts) in rounds of 1,000. Winners selected via combined server seed, client en

A tutorial contract testing fixed-size array passing as function parameters in Solidity.

A tutorial contract testing fixed-size array passing as function parameters in Solidity.

Second deployment of Vitalik's on-chain escrow (Oct 2015). Arbiters vote to release escrowed funds. Identical bytecode to the Sep 28 instance.

A minimal event-logging contract with a single function log(uint256) that emits MyEvent. Compiled with soljson v0.1.2, optimizer off.

Deployment of the official Solidity Greeter tutorial, initialized with "Hello World!" and compiled with soljson v0.1.1.

A Solidity date and time utility library deployed by Piper Merriam on October 6, 2015, providing functions to parse Unix timestamps into human-readable date com

Vitalik Buterin private lottery contract (Oct 2015). Single function: get(string). Minimum 0.007 ETH. Uses sha3+blockhash for randomness. Source not in any publ

Vitalik Buterin private lottery contract (Oct 2015). Single function: get(string). Minimum 0.007 ETH. Uses sha3+blockhash for randomness. Source not in any publ

Vitalik Buterin private lottery contract (Oct 2015). Three functions including a bet function (min 0.008 ETH) that calls an internal get(string) with hardcoded

Vitalik Buterin private lottery contract (Oct 2015). Three functions including a bet function (min 0.008 ETH) that calls an internal get(string) with hardcoded

Vitalik Buterin private lottery contract (Oct 2015). Most-used of the series. Three functions including bet (min 0.008 ETH). Source not in any public repo.

Vitalik Buterin private lottery contract (Oct 2015). Single function: get(string). Minimum 0.007 ETH. Uses sha3+blockhash for randomness. Source not in any publ

A Solidity string utility library authored by Piper Merriam and deployed on October 12, 2015, providing functions for converting between unsigned integers and s

This is the first of the 4 Etheria smart contracts, the first NFT collection on Ethereum.

adStorer auction registry by Vitalik Buterin (Oct 2015). Manages 8 ad auction slots. From dapp-bin ether_ad. Intermediate version, source not in public repo.

Vitalik Buterin ad auction registry contract (Oct 2015). From dapp-bin ether_ad project. Stores URLs and winners for 8 simultaneous one-phase and two-phase auct

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.

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.

An early Ethereum token contract deployed October 26, 2015 by Fabian Vogelsteller, one week before MistCoin. Likely a prototype of the ERC-20 standard Fabian wa

Etheria v1.1—an early on-chain hexagonal tile world and pioneering NFT project—deployed on October 29, 2015, with new locking and naming features.

Part of the first decentralized virtual world on Ethereum, deployed October 31, 2015. A fully on-chain hexagonal tile world.

The prototype token that inspired ERC-20, deployed by Fabian Vogelsteller on November 3, 2015, sixteen days before he submitted the ERC-20 proposal.