Bulls&Cows

What it does

For first view it isn't hard to implement Bulls and Cows game using smart contracts. But there is the pinfall - how can Host to prove their response without revealing the secret word? Here zero knowledge proofs appear. Host can respond for each guess with appropriate zk-proof which cryptographically proves that response corresponds to the secret and guess words without revealing the secret word. Looks like another beautiful zkp application!

Built With

• circom
• ethereum
• javascript
• metamask
• solidity
• truffle
• wasmsnark
• zk-snark