$ cat projects/vgdp-zk-delivery-proof.md
VGDP — Zero-Knowledge Gig Delivery Proof
Prove a delivery happened without revealing where the rider was.
A privacy-preserving delivery-confirmation protocol for gig/logistics riders. Riders prove they were within the delivery radius via a Groth16 zero-knowledge proof — only hashes and commitments touch the chain, never GPS coordinates.
// problem
Delivery disputes today require exposing rider GPS trails — a privacy violation and a central point of data abuse.
// impact
Solidity contracts (proof registry, dispute resolver, reputation) targeted at Polygon with Foundry, a Circom Groth16 circuit for radius proofs, a TypeScript off-chain validator service, a React Native SDK for rider apps, and an OpenAPI 3.0 spec with a Swiggy-style example integration.
// tech-stack