Grass
Jun 2025ETHGlobal Prague
Fitness verification platform using zkTLS to turn activity into onchain achievements.
overview
Grass turns real-world activity into verified onchain achievements.
It combines health tracking, social challenges, and incentives while using zero knowledge to verify fitness data without exposing sensitive metrics.
how it was made
- zkTLS verifies real fitness data from web sources.
- vlayer SDK handles private web proof verification.
- Smart contracts manage bets, user profiles, communities, and settlement on Ethereum.
awards
- vlayer - Best use of Web Proofs
- Blockscout - Big Blockscout Explorer Pool Prize