Frontier Era

The first publicly posted Ethereum contract that returned a value when called, demonstrating interactive smart contract execution.

An early ERC-20-like token deployed in Ethereum's first week, built directly from the example in the official Ethereum Frontier Guide documentation.

A second deployment of the FirstCoin tutorial token by the same creator, 11 blocks after the original — both derived from the official Ethereum Frontier Guide e

One of the earliest interactive contracts on Ethereum, allowing users to stake claims and leave permanent messages on the blockchain.

Ethereum.org tutorial Coin contract deployed on Frontier day 1. Contains a bug: balance(address) ignores its argument and returns msg.sender balance.

The original MyScheme pyramid contract with a 1 ETH entry fee, deployed on August 7, 2015.

One of Ethereum's earliest pyramid-style chain letter contracts, deployed 9 days after genesis. Required 10 ETH per entry and distributed payouts to earlier par

A small-denomination chain-letter investment contract paired with a 10-ETH variant, deployed August 7, 2015 by the same address. Accepts approximately 0.1 ETH p

The official Ethereum GlobalRegistrar deployed by the go-ethereum team in August 2015. This was the canonical name registry contract embedded as pre-compiled by

Fixed fee name registry deployed 7 August 2015, the night before NameRegistry and by the same account. Same 69 ETH fee, no read functions.

A single-function voting contract where users cast votes by sending ETH with a string candidate name, from the same developer who built MovieVoting.

Pay-to-vote bidding on bytes32 keys with append-only movie list.

A Frontier Day 1 movie voting contract where users send ETH to permanently rank movies on-chain — one of the earliest interactive dApps on Ethereum.

The second deployment of the official Ethereum GlobalRegistrar, deployed nine days after the first. Both deployments use identical bytecode pre-compiled and emb

A playful on-chain voting contract where users bid ETH to rank the best sci-fi movies of all time — one of the first interactive dApps on Ethereum Frontier.

Early Frontier-era name registry contract (Aug 8, 2015, block 51807) implementing reserve, register, and setContent functions for on-chain name resolution.

Another HelloWorld Greeter deployment by Linagee on Frontier Day 1 - the same deployer who started Ethereum's contract history.

A token contract with built-in escrow functionality, combining the dapp-bin BasicCoin interface with deposit and withdrawal operations.

Fixed-fee name registry from Day 9 of Ethereum (Aug 8, 2015). Reserve names for 69 ETH, resolve addresses. A precursor to ENS.

A Greeter with the message 'Ethereum will change the world smarter' - deployed Aug 8, 2015 by a developer connected to the Tokyo Smart Contract meetup.

A deployment of the CoinEscrow contract with identical function interface to rank 28, by a different deployer.

A Frontier Greeter compiled with an intermediate soljson build - same source as the standard tutorial, slightly different string return codegen.

A 102 percent pay-forward queue from 8 August 2015 that reverts on every deposit, appending to an array it never lengthens.

Early tutorial-derived coin contract compiled with Solidity v0.1.1, deployed 9 days after Ethereum Frontier launch.