Sahyogi - (Hack-a-Solution Hackathon Winner)

Sahyogi – Secure Document Verification (2020 → 2026)

Problem During the COVID-19 pandemic in 2020, India was preparing for large-scale JOSAA and NEET counselling involving over two million students. Physical document verification was impossible under lockdown, while fake documents remained a widespread issue. Centralized servers were not trusted for storing sensitive educational, medical, and official records.

Original Solution (2020) Sahyogi was built as a one-stop blockchain platform for:

Secure upload and decentralized storage of documents

Cryptographic verification using content hashes

On-chain timestamping and immutable records

Online counselling and verification flows with video support

The stack used Solidity smart contracts on the Matic (Polygon) network, Portis wallet, Truffle, Sia Skynet for decentralized storage, and Jitsi for video calls.

Result The project won Popular Vote Winner at the Hack-a-Solution 2020 hackathon. It demonstrated that blockchain + decentralized storage could replace trust in central authorities for document integrity during a global crisis.

Current architecture includes:

Secure Document Vault (/app) – fully functional local-first implementation using browser localStorage and SHA-256 hashing. Users can upload, anchor (simulated on-chain), verify integrity, retrieve timestamps, and open documents.

Beautiful glassmorphic UI with a custom 3D ethereal beams hero built with React Three Fiber.

Wallet connection layer (RainbowKit + Wagmi) kept in place for future on-chain integration.

Video call demo route preserved.

FAQ and philosophy remain consistent with the 2020 version: “help without trust,” no central server control, and resistance to single-point tampering.

Because the original testnets (Polygon Mumbai) and Sia Skynet are no longer available, the vault currently runs in a deterministic local mode. The entire flow (upload → verify → timeline) works end-to-end for demonstrations, and the codebase is structured to re-enable real on-chain anchoring with minimal changes once suitable infrastructure returns.

Secured the Popular Vote Winner award. Currently can be found on - https://sahyogi.hie.agency/