System Architecture
DecentraFit is built as a three-layer privacy architecture that connects real-world human activity to a verifiable digital network. Each layer from the devices, the application interface, to the ZK-enabled Layer-2 network serves a distinct function in maintaining data integrity, privacy, and proof of genuine health activity.
Devices
At the foundation of DecentraFit’s ecosystem are the DecentraFit Watch and Health Ring, both designed to operate as hardware oracles for authentic, real-world biometric data. Each device integrates multiple sensors — including heart rate (HR), heart-rate variability (HRV), blood oxygen (SpO₂), motion, and temperature — combined with embedded machine-learning models that verify genuine human activity and reject synthetic or replayed signals.
After validation, the device produces a Zero-Knowledge Proof (ZKP) through a lightweight SNARK circuit. This cryptographic proof verifies that the activity occurred without exposing any underlying biometric information. In this way, every DecentraFit device becomes a trust anchor in the network: a secure endpoint that converts human motion into verifiable, privacy-preserving digital evidence.
┌────────────────────────────┐
│ DecentraFit Devices │
│ • Sensor Fusion (HR, HRV, SpO₂)
│ • On-device AI validation
│ • ZK proof generator (SNARK circuit)
└────────────┬───────────────┘Application
The DecentraFit App acts as the central bridge between user devices and the decentralized Layer-2 network. It is responsible for securely managing encrypted proof submissions and maintaining user privacy at every stage of verification.
The app performs three primary functions:
Proof Aggregation – Collects and batches verified proofs of activity generated by the DecentraFit Watch and Health Ring before submitting them to the Layer-2 verifier.
Local Zero-Knowledge Verification – Validates each proof locally to ensure authenticity and prevent tampering or duplication prior to blockchain submission.
Encrypted Data Vault – Stores all user activity data locally using AES-256-GCM encryption. Biometric information never leaves the device or app environment unless the user explicitly authorizes it.
This layer acts as a cryptographic firewall and a privacy gateway, ensuring that every health proof remains user-controlled from creation to validation. In the DecentraFit model, privacy begins and ends with the individual, not with a remote server or centralized database.
│ Encrypted PoA-ZK proofs
▼
┌────────────────────────────┐
│ DecentraFit App │
│ • Proof aggregation │
│ • Local ZK verification │
│ • Encrypted data vault │
└────────────┬───────────────┘The Network
Our network operates as a Layer-2 protocol built on top of existing zero-knowledge infrastructure. The primary purpose is to verify proofs of activity, manage consensus validation, and handle automated token reward distribution — all while maintaining privacy, scalability, and efficiency.
Core Components
ZK Verification Engine The network uses recursive SNARK verification to confirm the authenticity of thousands of Proof-of-Activity attestations in a single, compact transaction. This process guarantees integrity without revealing any biometric or personal information.
Layer-2 Validators Validators operate within the host blockchain’s consensus layer, confirming aggregated batches of DecentraFit proofs. Their role is to ensure that only valid, ZK-certified proofs are committed to the underlying Layer-1 ledger for finality and security inheritance.
DFIT Reward Contracts Smart contracts automatically issue DFIT tokens to users based on their verified activity levels. Rewards are distributed transparently, with parameters defined by governance through the Health DAO.
Network Integrity
This architecture allows DecentraFit to maintain privacy, scalability, and decentralization simultaneously. By anchoring its consensus to an established ZK Layer-2 network, DecentraFit inherits enterprise-grade security while introducing a new mechanism for human-driven validation.
Every verified action contributes to both personal wellness and network resilience, creating a system where the act of staying healthy directly strengthens the decentralized ecosystem.
│ On-chain submission
▼
┌────────────────────────────┐
│ DecentraFit ZK Network │
│ • ZK verification engine │
│ • Layer-2 validators │
│ • DFIT reward contracts │
└────────────────────────────┘Last updated