auwalrg8/sabi-wallet-backend

Sabi Wallet backend • Rust • Non-custodial Lightning + Nostr + USSD • Kaduna-built • Buy/Sell Naira ↔️ BTC • Shamir recovery over Nostr • 100 % open source • MVP # sabi-wallet-backend ⚡₦ **Backend for Sabi Wallet – The Moniepoint of Bitcoin** Built in Kaduna, written in Rust, made for Nigeria & Africa. This repo powers the server side of Sabi Wallet: - USSD full wallet access (*333*777#) – works on Nokia 3310 - Fiat on/off-ramp webhook (GTBank/Paystack → instant BTC delivery) - Buy & Sell Bitcoin engine (Bitnob-style) - Social recovery coordinator (3-of-5 Shamir shares over encrypted Nostr DMs) - Nostr relay + key management - Admin dashboard & moderation queue - Rate limiting & fraud detection (Nigerian traffic patterns) ### Tech Stack (2025 battle-tested) - **Rust** + **axum** + **tower** - **Breez SDK** (Lightning payments & liquidity) - **nostr-sdk** (full client + encrypted DMs) - **PostgreSQL** + **sqlx** - **Redis** (sessions, rate limiting, trade state) - **Africa’s Talking** (USSD gateway) - Shamir secret sharing (recovery shares) - Paystack webhook integration - Docker + docker-compose ready ### Features already working (Dec 2025) - [x] USSD menu (balance, send, receive, buy BTC) - [x] Paystack → Breez instant BTC delivery - [x] Social recovery request & share submission - [x] Buy/Sell Naira ↔ BTC (we act as counterparty) - [x] Admin login + manual release dashboard - [x] Rate limiting per phone number ### Local development ```bash cp .env.example .env docker compose up -d postgres redis cargo run # USSD simulator: localhost # Admin dashboard: localhost # Frontend (Flutter): github.com