Frontier Era

A Democracy DAO governance contract deployed by Ethereum Foundation UX Lead Alex Van de Sande (avsa) on February 11, 2016, implementing the tutorial contract fr

Unicorns (🦄) token by avsa — 1802B variant. Source recovered by bytecode analysis, verified on Etherscan and Sourcify.

Unicorns (🦄) token by avsa — 1802B variant. Source recovered by bytecode analysis, verified on Etherscan and Sourcify.

A second Democracy DAO governance contract deployed by Alex Van de Sande (avsa) on February 11, 2016, eight minutes after a nearly identical deployment, as part

The Unicorn token (🦄) awarded for donating to the Ethereum Foundation tip jar, deployed 11 February 2016.

Standard ethereum.org tutorial token (Homestead, Mar 2016): name/symbol/decimals metadata, a public balanceOf mapping and an overflow-checked transfer firing th

A heartbeat contract that proves the Ethereum Alarm Clock is still executing calls

The canonical SimpleStorage (Homestead, Mar 2016): a single uint with set(x) and a constant get() getter, the opening example of the Solidity documentation. One

Twenty five indivisible units standing for kilowatt hours of wind generation.

Ten million units at four decimals, issued to a minter account separate from the deployer.

Byte-identical deployment of: Standard ethereum.org tutorial token (Homestead, Mar 2016): name/symbol/decimals metadata, a public balanceOf mapping and an overf

The ethereum.org democracy tutorial: token holders propose a transaction, vote on it for a fixed period, and the contract sends it if it passes.

Bitnation Holon DAO deployed by avsa on Feb 17, 2016. First proposal contract for the Bitnation DAO seed, with membership ranks and voting.

Bitnation Shares token deployed by avsa on Feb 17, 2016 during Bitnation migration to Ethereum.

A simple ETH piggy bank contract with deposit events, owner-only collect, and self-destruct. Uses a hardcoded instance ID (88) in deposit events to distinguish

A pyramid scheme promising 2x returns to ETH participants. 28 ETH remains locked — those who entered last will never be paid out.

Self-adjusting pyramid scheme with declining multipliers (3x to 1.5x), deployed February 23, 2016. 140 participants entered, 136 still waiting for payout. Sourc

Twenty one whole units at zero decimals, under an issuer who can mint and freeze.

An ether wrapper meeting nine of the ten mandatory EIP-20 requirements: its bounds check reads a + b > a, so a transfer of zero throws instead of succeeding.

Identical-runtime sibling. Standard ethereum.org tutorial token (Homestead, Mar 2016): name/symbol/decimals metadata, a public balanceOf mapping and an overflow

An ERC20-like token with mint, freeze, and transfer functionality based on the ethereum.org advanced token tutorial. 1,000,000 GOD tokens with 0 decimals.

Byte-identical deployment of: The canonical SimpleStorage (Homestead, Mar 2016): a single uint with set(x) and a constant get() getter, the opening example of t

Ten trillion indivisible units held by the deployer, who can mint more and freeze holders.

Identical-runtime sibling. Standard ethereum.org tutorial token (Homestead, Mar 2016): name/symbol/decimals metadata, a public balanceOf mapping and an overflow