NextVibe

NextVibe turns meeting someone in person into proof on Solana. Two people hold their phones together and both get a Proof of Meet: a card to share on X and a compressed NFT that names both of their wallets. Event organizers import a Luma event, check people in with the same tap, give every attendee a POAP, and see on a live dashboard who came and who met whom.

Links

Website	https://nextvibe.io
Solana dApp Store	solanadappstore://details?id=com.nextvibe.app (open on a Seeker)
Android APK	https://media.nextvibe.io/NextVibe.apk
iOS (App Store)	In Review
Demo video	https://youtu.be/bc-n_gHH1Rk
Organizer dashboard	https://dashboard.nextvibe.io

What it does

• Tap to Meet. Phones find each other over NFC (Android emulates an NFC tag that iPhones read in the background), Bluetooth LE on both platforms, or a QR code on iPhone. The other person confirms, and both get REP (+1 each outside events). How it works
• Proof of Meet. Every meet gets a public card (nextvibe.io/u/meet/…) and one cNFT per person with both wallets as creators. The two can add one selfie, published only when both say yes.
• Events. Import a Luma event, prove it's yours with an NV code, approve requests, and check people in with a tap (geofenced when the event has a location). Attendees get REP and a POAP; taps at the event count toward the event's stats. Events
• No wallet needed to start. POAPs and Proof of Meet are saved to the profile first ("POAP saved · claim anytime") and go on Solana when the person connects a wallet and claims.
• Free collects. Posts can be collected as cNFTs, 50 editions each; NextVibe pays the network fee, and on Android the collector co-signs with their wallet.
• Seeker Verified. A badge for wallets that hold a Seeker Genesis Token, checked on-chain through Helius, with a share card.
• Wallets. Mobile Wallet Adapter with Seed Vault on Seeker, LazorKit passkey wallets, and Phantom, Solflare or Backpack on iOS. Jupiter swaps on Android; tap-to-pay requests over NFC or Bluetooth.
• Organizer dashboard. Requests, check-ins, POAP claims, a heat map of taps, who met whom, top attendees and push broadcasts, at https://dashboard.nextvibe.io.
• Also: end-to-end encrypted chats with photos and videos (how), AI moderation of every public post and selfie, and a map of posts and events on H3 cells.

Architecture

flowchart LR
  App["NextVibe app<br/>Expo / React Native"] -- "REST" --> API["Django API + Celery"]
  App -- "WebSocket" --> RT["socket_service"]
  App -- "sign" --> W["Wallets<br/>MWA · Seed Vault · LazorKit"]
  API --> DB[("MySQL")]
  API --> R[("Redis")]
  API --> R2[("Cloudflare R2")]
  API --> NFT["nft-service<br/>Bubblegum"]
  NFT --> SOL(("Solana"))
  API --> MOD["moderation_service"]
  H["Helius"] -- "webhooks" --> IDX["tx-indexer"]
  IDX --> API
  RT --> DB
  RT --> R

Details: docs/ARCHITECTURE.md · API: docs/API.md

Repository map

Folder	What it is	Language	Docs
frontend/NextVibe	The mobile app (Android and iOS)	TypeScript, Expo SDK 55, React Native 0.83	README
backend/NextVibeAPI	REST API, Celery workers, push and email console	Python, Django 4.2, DRF, Celery	README
nft-service	Compressed NFT minting and the Seeker Genesis Token check	TypeScript, Bun, Elysia, Metaplex Umi	README
tx-indexer	Wallet transaction history from Helius	TypeScript, Bun, Elysia, BullMQ	README
socket_service	Realtime chats and in-app events	Python, FastAPI	README
moderation_service	Text and image moderation	Go	README
docs	Architecture, API, Solana, Tap to Meet, events, security	Markdown	docs

The website (nextvibe.io, with the /u/… share pages) and the organizer dashboard are separate repositories.

How to run it

A. Just try it

• Solana Seeker / Android: install NextVibe from the Solana dApp Store (solanadappstore://details?id=com.nextvibe.app) or download the APK: https://media.nextvibe.io/NextVibe.apk.
• iOS: the App Store version is In Review.

Tap to Meet needs two phones. An invite code is optional when you sign up.

B. Run the app from source against the production API (recommended)

The app already talks to https://api.nextvibe.io/api/v1 (frontend/NextVibe/src/utils/url_api.ts), so there is no backend to set up. It needs a development build: NextVibe has its own native modules (NFC host card emulation, Bluetooth), Mapbox and the Mobile Wallet Adapter, so Expo Go won't run it.

Requirements: Node.js, JDK 17, the Android SDK (Android Studio) and an Android phone with USB debugging (emulators can't do NFC, and their Bluetooth support is limited).

cd frontend/NextVibe
cp .env.example .env        # set RNMAPBOX_MAPS_DOWNLOAD_TOKEN before the first prebuild
npm install
npx expo prebuild --platform android
npx expo run:android

Variable (frontend/NextVibe/.env)	Needed?	Without it
RNMAPBOX_MAPS_DOWNLOAD_TOKEN	yes	The Android build can't download the Mapbox SDK. Use a Mapbox secret token with DOWNLOADS:READ.
EXPO_PUBLIC_MAPBOX_TOKEN	recommended	Maps stay empty and place names don't load.
EXPO_PUBLIC_JUPITER_API_KEY	no	Swaps use Jupiter's keyless lite API.
EXPO_PUBLIC_PAYMASTER_URL, EXPO_PUBLIC_PAYMASTER_API_KEY	no	Sponsored (gasless) wallet transactions don't work; everything else does.
EXPO_PUBLIC_VEXO_API_KEY	no	No analytics.

If you ran prebuild before setting the Mapbox token, run rm -rf node_modules/@rnmapbox/maps && npm install && npx expo prebuild --platform android --clean. More in frontend/NextVibe/README.md.

Checked on Sep 27, 2026 from a clean export of this repository (Node 26.7, npm 11.19): npm ci, npx expo prebuild --platform android and a full Android JavaScript bundle (npx expo export --platform android, 5,089 modules) succeed. The last step, npx expo run:android, wasn't run there because that machine has no Android SDK.

C. Self-host the backend (advanced, not needed to evaluate)

The backend reads more than 40 environment variables and needs accounts with Helius, Cloudflare R2, Resend, Mapbox, Expo push, OpenAI, Replicate and Cherry, a MySQL database, Redis, and a funded Solana keypair that pays fees and owns the Merkle tree and the collections (see nft-service/src/create-tree.ts). Running it locally is a lot of work; to evaluate NextVibe, use the production API (path B).

If you still want to: every service has a .env.example and a README with its run steps: API · nft-service · tx-indexer · socket_service · moderation_service. Django migrations aren't committed; the API README explains how to create them for a new database.

Solana

• cNFTs everywhere. POAPs, Proof of Meet, collected posts and the OG badge are Metaplex Bubblegum compressed NFTs in one Merkle tree (depth 14, 16,384 leaves), minted with mintToCollectionV1 by nft-service.
• NextVibe pays. One backend keypair is the fee payer, tree owner and collection authority; people never need SOL for any of it. Mints go through a queue with daily caps and retries (backend/NextVibeAPI/posts/src/collectible_mint.py).
• Co-signed collects. On Android, a collect is one transaction with a mint and an SPL Memo (NextVibe | collected post <id> | #<n> of <total>) that requires the collector's signature from their wallet (Mobile Wallet Adapter, Seed Vault on Seeker).
• Both wallets on-chain. Each Proof of Meet leaf lists both people's wallets as creators.
• Seeker Genesis Token check over Helius RPC (Token-2022 mint authority and group).
• Helius for RPC, DAS lookups and the webhooks behind wallet history (tx-indexer).

Step by step, with the code for each flow: docs/SOLANA.md.

Built during CLOCK IN

The work done since Sep 8, 2026, with dates and files, is in CHANGELOG-hackathon.md.

Team

• Danylo Klepar, founder and developer: @DanKlepar, Telegram @danylo_nv, [email protected]
• Mark Vendysh, co-founder, business development and operations

Project on X: @NextVibeWeb3. Security reports: docs/SECURITY.md.

License

Source-available, all rights reserved: you can read the code, and build and run it to evaluate NextVibe (for example as a hackathon judge). Anything else needs written permission. See LICENSE.