Frontier Era

An early on-chain lottery contract deployed on Frontier by the prolific 0xFD2605 deployer cluster.

An early Ethereum roulette contract from August 2015, notable for a critical randomness vulnerability: its 'private' seed is hardcoded to 1 in the constructor.

The canonical Solidity 'multiply by 7' tutorial contract from the Frontier documentation.

A Frontier-era Greeter contract with the message: 'Hello! I'm Alec's first contract.'

Aug 8 2015 deploy by 0x8674c218 — one of the most prolific contract deployers of Ethereum's first day. Sibling of the verified MessagingContract / Ponzi / Messa

Aug 8 2015 deploy by 0x8674c218 — one of the most prolific contract deployers of Ethereum's first day. Sibling of the verified MessagingContract / Ponzi / Messa

A tiny CALLCODE proxy that forwards calls to the Ethereum Foundation multisig wallet library.

A pricing and deposit management contract from August 11, 2015, featured by ether.camp founder Roman Mandeleil as a notable early Frontier contract.

A two-party time-locked escrow deployed Aug 11 2015 by Linagee and funded with 20 ETH. requestEther(uint256) releases funds to the owner after a 5-day timelock (or anytime by the counterparty).

A Frontier-era Greeter contract with the message: 'well hello there cc'

The canonical ethereum.org 'Dapps for Beginners' subcurrency (token): sendCoin transfers with a CoinTransfer event.

A self-destructed Frontier-era contract from August 12, 2015, that processed over 520 ETH before being destroyed. Mentioned in the ether.camp launch thread.

An early EF multi-party signaling contract (Serpent, Aug 2015). Three developer keys co-sign to emit on-chain events. No ETH, no external calls.

Immutable state variables initialized in declaration + public auto-getter.

Owner-controlled custody contract with ICAP-style transfer events.

King of the Hill bidding game with time-based claim and emergency kill code.

A minimal contract that immediately sends any received ETH back to the sender.

One of the earliest provably-fair dice gambling contracts on Ethereum, deployed August 12, 2015 (day 13 of Frontier). Commit-reveal dice game with 2% house edge

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.

Aug 8 2015 deploy by 0x8674c218 — one of the most prolific contract deployers of Ethereum's first day. Sibling of the verified MessagingContract / Ponzi / Messa

Aug 8 2015 deploy by 0x8674c218 — one of the most prolific contract deployers of Ethereum's first day. Sibling of the verified MessagingContract / Ponzi / Messa

Frontier-week hash-prediction bidding game from August 2015, 13 days after Ethereum's mainnet launch. Players bid on future block hashes.

64.64 fixed-point library: e_exp, ln, floor_log2 for an early LMSR prediction market. Deployed Aug 12, 2015 — pre-Gnosis.

World's earliest known on-chain prediction-market resolution oracle, deployed August 12, 2015 — resolves bets on Ethereum mining difficulty.