Frontier Era

Timestamp-parity coinflip with balance guard and donate().

Commit-reveal lottery prototype deployed on 8 August 2015, the earlier draft of the EarlyLottery contract by the same developer.

The Frontier Guide's Coin tutorial contract: a pre-ERC-20 token with coinBalanceOf, sendCoin and a CoinTransfer event.

Timestamp-parity coinflip; payout is `2 * msg.value` via `send`.

The Frontier Guide's Coin tutorial contract: a pre-ERC-20 token with coinBalanceOf, sendCoin and a CoinTransfer event.

The Frontier Guide's Coin tutorial contract: a pre-ERC-20 token with coinBalanceOf, sendCoin and a CoinTransfer event.

A tiny utility contract that returns the SHA3 hash of a uint256 input.

A tiny utility contract that returns the SHA3 hash of a uint256 input.

A tiny utility contract that returns the SHA3 hash of a uint256 input.

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

Tutorial-derived coin contract (Solidity v0.1.1), deployed Aug 9, 2015 during the Frontier era.

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 minimal ETH forwarding contract that sends funds to a hardcoded address, deployed on Frontier Day 1.

Optimized version of the ETH Forwarder - same source compiled with soljson optimizer ON, producing 133 bytes vs 241.

The first lottery contract deployed on Ethereum mainnet, created August 9, 2015 by one of the earliest recorded Ethereum users. Built, tested with two participa

A commit-reveal lottery on an 88-block cycle, deployed August 9, 2015, ten days after genesis. Players commit a hashed secret, reveal it to earn one ticket per 0.1 ETH, and the winner is drawn from the XOR of all revealed secrets. Source recovered by exact bytecode match (solc v0.1.1).

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.

An early 100 ETH tree-payout chain letter (MyScheme) deployed on Frontier, Aug 9 2015; still holds 1 ETH.

A 100-ETH chain-letter investment contract deployed August 9, 2015, part of an early family of Frontier-era financial experiment contracts with variants accepti

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

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

A king-of-the-hill game contract from August 2015 exploring behavioral economics and game theory on Ethereum.

A second deployment of the Ethereum GlobalRegistrar — the early name registry that predated ENS — made on August 10, 2015.