Online contest

Find and exploit vulnerabilities in smart contracts in the Ethereum blockchain. Receive points for each completed task. Get the most points and win! In case of a tie, the winner is the participant who has completed the tasks more quickly.

How to take part

Held online during PHDays. Anyone is invited to join.

Technical requirements

The smart contracts will be on the Ropsten testnet. Participants will need an Ethereum local client or browser extension (MetaMask).


1st place: Ether (equivalent of $1,000)
2nd place: Ledger Nano S cryptocurrency hardware wallet
3rd place: Swag from the organizers


1st place: Alexey Pertsev
2nd place: Alexey Karpov
3rd place: Alexander Vlasov