Lottery / Gambling Contracts

The first draft of the EarlyLottery commit-reveal lottery, deployed on 8 August 2015 a few hours before its rewrite.

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.

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

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).

Commit-reveal dice game deployed day 13 of Ethereum mainnet with 1,000 ETH bankroll. Still active in 2026 with 84 ETH locked. 1% house edge, 1 ETH minimum bet.

A pre-release August 2015 test build of the EtherPot blockhash lottery, deployed three weeks into Frontier and never played.

The public EtherPot lottery, an August 2015 Frontier contract whose blockhash-based winner selection became an early cautionary tale about on-chain randomness.

A coin flip wager contract endowed with 6 ETH, deployed 2 September 2015.

The first deployed version of a coin flip wager contract, endowed with 1 ETH on 2 September 2015.

A coin flip wager contract that refuses bets the bankroll cannot cover, endowed with 1 ETH on 2 September 2015.

A coin flip wager contract endowed with 1 ETH, deployed 2 September 2015.

A coin flip wager contract that reads the current block hash and gets zero back, endowed with 1 ETH on 3 September 2015.

A coin flip wager contract carrying a commented-out attempt at using a block hash, endowed with 1 ETH on 3 September 2015.

A coin flip wager contract that draws its outcome from the previous block hash, endowed with 1 ETH on 3 September 2015.

A provably-fair commit-reveal gambling contract from the Ethereum dapp-bin, deployed 47 days after Frontier genesis.

Revised Pool5x lottery prototype by Bertani (Oraclize), deployed 17 blocks after v1. Stores 5x msg.value and emits debug log events.

Provably-fair betting game where players choose their own odds. The owner settles bets with a commit-reveal random seed. Includes a 2-day emergency refund.

Sibling of 0x034dF870 (SerpentGamble). Provably-fair Serpent betting game; players choose their own odds, owner settles via commit-reveal seed, 2-day refund.

Sibling of 0x034dF870 (SerpentGamble). Provably-fair Serpent betting game; players choose their own odds, owner settles via commit-reveal seed, 2-day refund.

Intermediate build of serpent_gamble, a provably-fair betting dapp (Bet/Win/Loss/NewSeed), related to verified sibling 0x59375871. Source not yet reconstructed.

Intermediate build of serpent_gamble, a provably-fair betting dapp (Bet/Win/Loss/NewSeed), related to verified sibling 0x59375871. Source not yet reconstructed.

Intermediate build of serpent_gamble, a provably-fair betting dapp (Bet/Win/Loss/NewSeed), related to verified sibling 0x59375871. Source not yet reconstructed.