Zero-party data is data that a customer intentionally and proactively shares with a brand. My project ZeroPartyData uses zk-snarks to verify is user is eligible for latest gift or offers.

Project requires users to submit information about their Work-type, Age & income. This is suppose to be checked against eligibility criteria for availing discount offer.

Personal data is not stored on-chain, however zero knowledge proof allows us to verify all 3 criteria. If proved, user address is noted for availing discount offer.

zk-SNARK based ZeroPartyData provides data protection, so when users connect to a third party, it never discloses personal data. But allows one to prove personal information .

STACK USED:

BACKEND FRAMEWORK : Hardhat + Solidity

ZERO KNOWLEDGE PROOF : zk-snarks created using Circom 2.0 & snarkjs.

FRONTEND: Nextjs + ether.js

NETWORK: Polygon

SPONSORS

Polygon: solves common blockchain pain points, offering low gas fees and high speeds without sacrificing security.

Spheron: Spheron is the simplest, fastest and most convenient way to deploy your web apps and projects onto Decentralized Cloud Storage

CHALLENGES :

I learnt Zero Knowledge concepts. Started writing circuits using Circom 2.0 . Bringing all piece togather for creating fullstack dapp was a big challenge. snarkjs library is to be used inside hardhat & frontend to allow proof creation inside UI. Verification done by on-chain contract.

ACHIEVEMENT:

Understanding Zero Knowledge concepts for the first time was tough but exciting. After very long time found something so cutting edge.