The Vitalik Collection

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.

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.

The full serpent_gamble provably-fair betting dapp: bettors pick their own odds, the owner settles rounds via a commit-reveal seed, with an emergency refund.

Sibling of 0x59375871 (SerpentGamble). The full serpent_gamble provably-fair betting dapp from ethereum/dapp-bin.

Sibling of 0x59375871 (SerpentGamble). The full serpent_gamble provably-fair betting dapp from ethereum/dapp-bin. This deployment later self-destructed.

Unverified Serpent contract deployed by Vitalik Buterin (Sept 2015); 8 functions and 4 custom events. Purpose not yet determined from bytecode.

Arbiter registry by Vitalik Buterin (Sep 2015). Pay 1+ ETH to list yourself. Fee decays 50%/month. One of the earliest on-chain reputation systems on Ethereum.

On-chain escrow by Vitalik Buterin (Sep 2015). Two parties designate arbiters; majority vote releases funds. One of the earliest smart contract dispute systems.

Second deployment of Vitalik's on-chain escrow (Oct 2015). Arbiters vote to release escrowed funds. Identical bytecode to the Sep 28 instance.

Vitalik's first multi-auction ad registrar (Oct 6, 2015). EXACT byte-for-byte match.

Vitalik Buterin Serpent oracle fetcher (Oct 12, 2015). get(string) requires >=0.007 ETH, derives a request id from sha3+block.prevhash, emits GetRequest, returns the id, and sends the balance to Vitalik's 0xde0b2956 address. Byte-for-byte cracked (Serpent @ f0b4128).

Vitalik Buterin Serpent oracle fetcher (Oct 12, 2015). Same get(string) request contract as 0x7e7f6373; sweeps balance to 0xb3cd4c25. Byte-for-byte cracked (Serpent @ f0b4128).

Vitalik Buterin Serpent oracle caller (Oct 12, 2015). Two functions: call() invokes an external fetcher's get(string) and stores a callback id; callback() re-emits the response as LogResponse. NOT a lottery. Byte-for-byte cracked (Serpent @ f0b4128).

Vitalik Buterin Serpent oracle caller (Oct 12, 2015). callback + call; call() forwards value to an external fetcher's get(string) and stores a callback id. Sibling of 0xc861fc8d. Byte-for-byte cracked (Serpent @ f0b4128).

Vitalik Buterin Serpent oracle caller (Oct 12, 2015). Two functions: call() emits a placeholder "cow" log, calls an external fetcher's get(string) forwarding value, and stores a callback id; callback() re-emits the response. NOT a lottery. Byte-for-byte cracked (Serpent @ f0b4128).

Requests off-chain data from a URL through an external fetcher contract and records the returned result on-chain by emitting an event.

Vitalik Buterin Serpent oracle fetcher (Oct 12, 2015). get(string) request contract; sweeps balance to 0xb3cd4c25 (send-before-return variant). Byte-for-byte cracked (Serpent @ f0b4128).

Serpent ListLogs on-chain log aggregator by Vitalik Buterin (Oct 18, 2015). addLog(str) emits Log(bytes); addBreak()/getLatestBreak() track block-number checkpoints. Sibling of 0xa619c3df. Byte-for-byte cracked (Serpent @ f0b4128).

On-chain log aggregator (Serpent, list_logs/main.se): addLog(v) emits a Log(string) event; addBreak() marks the current block as a section boundary.

The store behind the ether_ad advertising dapp, holding eight auctioned ad slots

The second ether_ad store, redeployed two days later with a revised two phase auction

A minimal on-chain logging contract: addLog(s) emits a Log(string) event and addBreak() records the current block number as a section marker.

A pay-to-send on-chain email service (Serpent): email(to, subject, body) emits an Email event with the three strings if the caller pays at least 0.007 ETH.

A token contract deployed by Vitalik Buterin, compiled from currency.se (Serpent) in the ethereum/dapp-bin repository. Deployed days after Devcon 1 and one week before EIP-20 was published.

Dead man's switch: owner pings to stay alive, trustee can withdraw after 1000 seconds of inactivity

An empty Solidity contract with no state, constructor, or functions. Deployed by Vitalik, most likely as a throwaway or gas probe.

A three party escrow whose seller and arbiter are written into the code, with the deploying account taken as the buyer.

DAO whitehat balance-conditional router: if EF/whitehat address holds >1M ETH, route to addr1; otherwise route to addr2.

A Serpent forwarder that routes its entire balance to one of two addresses depending on whether the WithdrawDAO refund contract still holds over 1,000,000 ETH.

Vitalik's CREATE factory: pre-computes child address via RLP([self,0]), deploys moose.se, calls moose() to verify, emits Lol event

Constructor-only contract that splits incoming ETH equally between Vitalik's two addresses; the deployed runtime is a 12-byte always-revert stub.

Simple 3-party escrow contract: partyA (beneficiary), partyB (refund recipient), arbiter (mediator). Either party can pay the other, or the arbiter can settle.

Sibling of 0xa2af18e8 (SplitOnDeploy). Constructor-only contract that splits incoming ETH between Vitalik's two addresses; its runtime is a 12-byte revert stub.

A minimal two-party escrow with an arbitrator. finalize() releases funds to the seller; refund() returns them to the buyer. Byte-identical to verified sibling.

Sibling of 0x9b27a230 (Escrow). Simple 3-party escrow: partyA (beneficiary), partyB (refund recipient), and an arbiter who can release or refund.

A crowdfunding variant with a resumable, gas-guarded refund loop that persists its progress, so a large refund can complete across multiple transactions.

A crowdfunding contract with a 0.06 ether goal and a 500 second window, deployed 30 October 2016.

A crowdfunding contract with a 0.06 ether goal and a 400 second window, deployed 30 October 2016.

A crowdfunding contract with a 0.06 ether goal and a 500 second window, deployed 30 October 2016.

A crowdfunding contract with a 0.06 ether goal and a 500 second window, deployed 30 October 2016.

A crowdfunding contract with a 0.06 ether goal and a 500 second window, deployed 30 October 2016.

A minimal Ether receiver that emits a Received event on every payment, deployed from Vitalik Buterin's testing address using Solidity 0.4.4.

A minimal Ether receiver that emits a Received event on every payment, deployed from Vitalik Buterin's testing address using Solidity 0.3.6.

Minimal two-party escrow with an arbitrator (731-byte variant), part of Vitalik's 2016 escrow series.

A one-shot payment splitter: the payable constructor splits the deployed value between Vitalik's account and vitalik.eth. Byte-identical to a verified sibling.

Sibling of 0x668cd325 (SplitOnDeploy). One-shot payment splitter: the payable constructor splits the deployed value between Vitalik's account and vitalik.eth.

Minimal two-party escrow with an arbitrator (688-byte variant), part of Vitalik's 2016 escrow series.

A three party escrow where either the buyer or the arbiter can release the money

The split contract that forgot to be payable

A four line contract that splits whatever you send it between two addresses

The escrow whose rewritten guard locks out every caller