Frontier Era

The 2015 tutorial token renamed to Coin, which turned its initialiser into a public function anyone can call to set their own balance.

A copy of the coin contract from the Frontier Guide, the two function token that taught a generation of Ethereum developers to move a balance.

A copy of the coin contract from the Frontier Guide, the two function token that taught a generation of Ethereum developers to move a balance.

The Solidity tutorial subcurrency, deployed unaltered

Delegated voting over five proposals, with the chairperson handing out voting rights

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

A 2015 public key directory that keys every entry off tx.origin instead of msg.sender.

Sibling of 0x59375871 (SerpentGamble). The full serpent_gamble provably-fair betting dapp from ethereum/dapp-bin. This deployment later self-destructed.

The Coin contract from the Solidity tutorials. sendCoin and coinBalanceOf. One of 83 identical deployments.

Unverified Serpent contract deployed by Vitalik Buterin (Sept 2015); 8 functions and 4 custom events. Purpose not yet determined from bytecode.

Arbiter registry by Vitalik Buterin (Sep 2015). Pay 1+ ETH to list yourself. Fee decays 50%/month. One of the earliest on-chain reputation systems on Ethereum.

On-chain escrow by Vitalik Buterin (Sep 2015). Two parties designate arbiters; majority vote releases funds. One of the earliest smart contract dispute systems.

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

The five element Descriptor from Cyrus Adkisson's Solidity walkthrough