Frontier Era

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.

The second incrementer from the solidity-baby-steps tutorials, written to show what a transactional call looks like from geth.

The third incrementer from the solidity-baby-steps tutorials, adding a second parameter to the transactional call.

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

The subcurrency example from the Solidity documentation with a payable deposit bolted on.

A minimal Pong contract with an int8 getter/setter and owner-only selfdestruct. Simpler predecessor to the tutorial Pong at 0x3a0cc907.

An earlier draft of the solidity-baby-steps Pong, before the value moved into the constructor.

The Pong half of the solidity-baby-steps ping-pong pair, written to test whether one contract can read a non-constant return value from another.

The Ping half of Cyrus Adkisson's contract to contract call exercise

Inter-contract communication tutorial. Ping calls Pong to retrieve a value, demonstrating cross-contract function calls in Solidity.

Inter-contract communication tutorial. Ping calls Pong to retrieve a value, demonstrating cross-contract function calls in Solidity.

Classic 3:1 pyramid scheme with Bitcoin bridge integration, deployed September 7, 2015. 1 ETH to enter, 2.7 ETH payout every 3rd participant. Originally hosted

The exchange example from the ethereum dapp-bin standardized contract APIs, whose deleteOrder lets anyone cancel anyone else's order.

An early Frontier-era token contract implementing a pre-ERC-20 interface, deployed on September 8, 2015 by an address associated with the ENS name collectibletr

The datafeed example from the ethereum dapp-bin standardized contract APIs, a single owner key value oracle.

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

The Greeter from the solidity-baby-steps tutorials, which is a different contract from the ethereum.org greeter of the same idea.

A two dimensional array exercise from Cyrus Adkisson's Solidity walkthrough

An array in, array out exercise from Cyrus Adkisson's Solidity walkthrough