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Synchro Project - Current State

Last Updated: April 2026
Project Phase: MVP Development - Advanced Stage Document Owner: Engineering Team Update Cadence: Every Sprint / Major Feature Release

Executive Summary

Synchro is a self-custodial subscription management platform that empowers users to control their recurring payments using crypto. The project has evolved significantly and now features a robust backend with 20+ functional API routes and 30+ core services, a set of specialized smart contracts for the Stellar Soroban network, and a client (Next.js frontend) that is fully integrated with a real Supabase database. The core subscription management engine, risk detection system, and reminder engine are all operational.

Project Structure Overview

SYNCRO/
├── client/          # Next.js frontend application (Integrated with Supabase)
├── backend/         # Express.js API server (Full-featured services & routes)
├── contracts/       # Soroban smart contracts (Subscription, Escrow, Virtual Cards)
├── sdk/             # SDK for integration (Stellar/Soroban utilities)
└── supabase/        # Database schema and migration scripts

1. Client Folder (/client)

Status: ✅ Fully Functional (Integrated with Real Backend)

✅ What's Implemented

Frontend UI/UX (100% Complete)

  • Complete dashboard with real-time subscription cards and analytics
  • Subscription management (Full CRUD operations with Supabase persistence)
  • Team management interface (Integrated with backend team routes)
  • Settings page with profile, security (MFA), and integration management
  • Notifications panel with real-time alerts
  • Onboarding flow for new users
  • Command palette (Ctrl+K) for quick navigation
  • Dark mode support and responsive design

Data Integration & State

  • Supabase Integration: Real database connection established using @supabase/ssr
  • Real Data Persistence: All user data, subscriptions, and settings persist in PostgreSQL
  • Authentication: Fully implemented using Supabase Auth, enforced via Next.js middleware
  • MFA Support: Integrated multi-factor authentication flow

Business Logic & Utilities

  • Advanced currency conversion and exchange rate tracking
  • Smart duplicate detection for subscriptions
  • Detailed audit logging for all user actions
  • Performance optimizations (memoization, debouncing, request deduplication)

⚠️ What's Partially Implemented

  • Email Parsing: UI is ready; backend services exist for Gmail/Outlook but deep parsing logic is undergoing refinement.
  • Payment Processing: Stripe and Paystack are configured; live payment flows are being finalized.

❌ What's Not Implemented

  • Fully Automated On-Chain Payments: Currently waiting for non-custodial Stellar card issuance availability.

2. Backend Folder (/backend)

Status: ✅ Production-Ready Core (Feature-Rich API)

✅ What's Implemented

Core Infrastructure

  • Robust Express.js 5.2.1 server with TypeScript support
  • Comprehensive middleware (Auth, Error Handling, Request Validation, CORS)
  • Advanced Rate Limiting (Redis-backed) on sensitive endpoints
  • Structured logging with PII redaction and audit service integration

API Endpoints (20+ Routes)

  • subscriptions: Full CRUD, bulk operations, and renewal history
  • analytics: Spending trends, category breakdown, and forecasts
  • team: Role-based member management and invitations
  • user: Profile management and user preferences
  • mfa: TOTP-based multi-factor authentication
  • risk-score: Intelligent risk assessment for subscriptions
  • suggestions: AI-powered money-saving recommendations
  • compliance: Automated compliance checks and data export (GDPR)
  • webhooks: Support for Stripe and Paystack payment events

Services (30+ Core Services)

  • Reminder Engine: Automated multi-channel notifications
  • Risk Detection: Pattern matching to identify billing anomalies
  • Blockchain Service: Integration with Stellar Soroban contracts
  • Email Service: Integration with Gmail/Outlook APIs for scanning
  • Analytics Service: Complex data aggregation for spending insights
  • Idempotency: Ensuring reliable processing of state-changing requests

✅ Security Features

  • Secret Management via SecretProvider interface
  • Recursive log masking for sensitive data
  • MFA and session security enforcement

3. Contracts Folder (/contracts)

Status: ✅ Functional Smart Contracts (Beyond Placeholders)

✅ What's Implemented

Smart Contracts (Stellar Soroban)

  • subscription_registry: Core storage and metadata management for subscriptions
  • subscription_renewal: Logic for handling recurring payment cycles
  • virtual-card: Interface for non-custodial card interaction
  • escrow: Secure holding of funds for pending payments
  • agent-registry: Management of authorized renewal agents
  • subscription_logging: On-chain audit trail for subscription events

Infrastructure

  • Soroban workspace with SDK 23
  • Automated deployment scripts and test snapshots
  • Detailed documentation for delegated execution and renewal windows

❌ What's Not Implemented

  • Mainnet Deployment: Currently tested on Testnet; awaiting final security audit.

Critical Path to MVP Completion

Priority 1: Production Hardening

  1. Finalize payment provider webhooks for production environments.
  2. Complete security audit for smart contracts.
  3. Optimize database queries for large-scale subscription datasets.

Priority 2: Integration Refinement

  1. Improve email parsing accuracy for specialized merchant invoices.
  2. Enhance Telegram bot for richer interaction with the subscription engine.

Success Metrics

MVP Status: ✅ 90% Complete

  • Users can register, login, and enable MFA
  • Full subscription CRUD with data persistence
  • Automated reminders via multiple channels
  • Risk detection and spending analytics
  • Functional smart contracts on Stellar Testnet
  • Live payment processing for all supported regions (Final testing)

Technology Stack Summary

  • Frontend: Next.js 15, React 19, Tailwind CSS v4, Supabase Auth
  • Backend: Node.js 20, Express.js 5, TypeScript, Redis
  • Database: PostgreSQL (Supabase)
  • Blockchain: Stellar Soroban (Rust)
  • Payments: Stripe, Paystack
  • Monitoring: Sentry, Custom Audit Service

Documentation Cadence

  • Review: Every 2 weeks during sprint planning.
  • Update: Upon completion of major feature sets or architectural changes.
  • Owner: Tech Lead / Documentation Lead