SleepFi — Sleep-to-Earn on Solana

Stake SOL on your sleep. Hit your goal every night. Earn from the pool of people who failed.

sleepfi-landing.vercel.app · Download APK · Built for the Solana Seeker hackathon by HeyNeuron.

---

How It Works

1. Connect your Phantom or Solflare wallet (Mobile Wallet Adapter)
2. Set a challenge — choose your sleep goal (6.5–9h), duration (3/7/14 days), stake amount (min 0.05 SOL)
3. Stake SOL — locked in an on-chain Anchor program vault (trustless, no one can take it)
4. Log sleep every morning — verified automatically via Health Connect (Android only)
5. Complete the challenge — claim your stake back + proportional share of the reward pool
6. Miss a night — your stake goes to the pool, distributed to winners

Reward Pool Model

Inspired by Moonwalk. No free bonuses from treasury — rewards come only from other challengers who failed:

• Win → stake back + your proportional share of all failed stakes (platform takes 5%)
• Fail → stake goes to the pool for winners

The more people fail, the more winners earn. Aligned incentives.

---

Sleep Tracking Requirements

Health Connect is required — manual entry is not supported (trivially gameable).

To use SleepFi you need one of these apps installed on your Android device that writes sleep data to Health Connect:

• Samsung Health (built-in on Samsung devices)
• Sleep as Android
• Google Fit
• Garmin Connect
• Fitbit
• Polar Flow
• Any app that syncs to Android Health Connect

How a night is counted:

• The app reads your longest sleep session between 20:00 yesterday and 12:00 today
• If duration >= your goal → streak +1, night logged as success
• If duration < your goal → streak broken, night logged as fail
• Logs are submitted to the on-chain oracle daily

Requirements:

• Android 9+ (Health Connect minimum)
• Health Connect app installed (pre-installed on Android 14+, downloadable for older versions)
• A wearable that tracks sleep — smartwatch, smart ring (Oura, Galaxy Watch, Garmin, Fitbit, Whoop, etc.) or a phone-based tracker (Samsung Health with phone on the bed)
• At least one sleep-tracking app connected to Health Connect

No wearable = no data = streak broken. Keep your device charged.

---

On-Chain Architecture

SOL is locked in a Program Derived Address (PDA) vault — not a regular wallet. The Anchor program controls when and to whom it's released.

Program ID: Gq6HZCUkXhznL8BBfEVXwnB4BCyzfvhpu4CwYe86wUuD (devnet)
Pool PDA:   GiqenKFwjeqcgGztmvR31bn44miKp5WxbqsDNDyWqGq1
Oracle:     Brdg78coo8Z5qv6bmxYwGBfEgfP8fJ8nrPj7iek7y6eE

View program on Solana Explorer →

Instructions:

• start_challenge — user stakes SOL into PDA escrow vault
• submit_sleep — oracle signs on-chain after verifying Health Connect data
• complete_challenge — oracle marks challenge won (all days met)
• fail_challenge — oracle closes failed challenge, SOL moves to pool PDA
• claim_reward — user claims stake back + proportional share of the pool

This means: even if HeyNeuron disappears, your SOL is safe in the program vault. No admin key, no rug.

---

Stack

Layer	Tech
Mobile	Expo 53, React Native, Expo Router
Wallet	@solana-mobile/mobile-wallet-adapter-protocol
On-chain	Anchor 0.32, Solana devnet
Sleep tracking	react-native-health-connect (Android, Health Connect only)
Oracle/Backend	Next.js API Routes on Vercel (sleepfi-api.vercel.app)
Database	Neon Postgres — leaderboard + sleep record history
UI	Reanimated 4, Phosphor icons, custom dark theme
Fonts	Syne 700, DM Sans, JetBrains Mono

---

Screens

• Welcome — Connect Wallet (Phantom/Solflare via MWA)
• Dashboard — Streak hero number with breathing animation, weekly sleep bar chart
• New Challenge — Sleep goal slider (6.5–9h, shown publicly on leaderboard), duration, stake
• Log Sleep — Health Connect auto-fetch with refresh button
• Rewards — Live pool display, claim button (on-chain)
• Leaderboard — Top sleepers ranked by streak, goal hours visible

---

Setup

Prerequisites

• Node 18+
• Android device with Phantom or Solflare installed
• Health Connect + a sleep tracker app on the test device

Install

npm install

Environment

Create .env.local:

DATABASE_URL=postgresql://...your-neon-connection-string...
EXPO_PUBLIC_TREASURY_WALLET=your-oracle-wallet-pubkey
TREASURY_PRIVATE_KEY_BASE64=your-oracle-keypair-base64
EXPO_PUBLIC_API_URL=http://localhost:8081

Run

npx expo run:android    # Full native build (required for MWA + Health Connect)

Build APK

npx eas-cli@latest login
npx eas build --platform android --profile preview

---

Treasury / Oracle Wallet (Devnet)

Brdg78coo8Z5qv6bmxYwGBfEgfP8fJ8nrPj7iek7y6eE

Acts as the oracle — signs submit_sleep instructions on-chain after verifying Health Connect data.

---

Built by

HeyNeuron — agentive software studio, Krakow