2Gamble

Prototype

Token economy platform prototype demonstrating deposit/withdrawal flows, user token management, and admin analytics. Built to explore payment integration patterns and real-money balance systems.

What It Does

→User authentication with secure session management
→Stripe integration for deposits and withdrawals with transaction logging
→Token-based economy with user balances and transaction history
→Admin dashboard with user analytics, transaction monitoring, and controls
→Withdrawal approval workflow with admin review and payout processing

What I Built

→Next.js application with API routes for payment processing
→PostgreSQL database schema for users, balances, and transaction ledger
→Stripe payment intent flow with webhook handlers for deposit confirmations
→Admin panel with role-based access control and transaction filtering
→Balance reconciliation system to prevent double-spending or overdrafts

Technical Challenges

Payment Reconciliation

Stripe webhooks can arrive out of order or fail silently. Built an idempotency system to ensure deposits are credited exactly once, even if webhooks are replayed or delayed.

Transaction Integrity

User balances must never go negative or duplicate. Used database transactions and row-level locking to prevent race conditions when processing concurrent deposits/withdrawals.

Withdrawal Approval Flow

Withdrawals require admin approval to prevent fraud. Built a queue system where pending withdrawals are frozen in user balances until approved or rejected by admins.

What I Learned

Handling real money is different: Unlike typical CRUD apps, financial systems require idempotency, audit trails, and reconciliation logic. Every transaction needs a paper trail.

Stripe webhooks are asynchronous: Payment confirmations don't happen instantly. The user experience needs to handle "processing" states gracefully while webhooks finalize in the background.

Admin controls are critical: Any platform handling deposits/withdrawals needs fraud detection, manual review capabilities, and the ability to freeze accounts or reverse transactions.

Where This Pattern Applies

→Marketplace platforms with escrow or seller payouts
→Subscription services with credits or wallet systems
→Reward programs with point redemption and cash-out options
→Gaming platforms with in-game currency and real-money conversion