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B2B API Architecture July 22, 2026 8 min read LuxGame Engineering Team
How to Integrate iFrame Games via Seamless Wallet REST APIs
Best practices for implementing debit, credit, rollback, and session authentication endpoints for sub-50ms casino wallet balance sync.
Integrating third-party casino games into an existing player portal requires speed, security, and financial transaction atomicity. The iFrame Seamless Wallet pattern allows operators to embed game canvases directly on their domain while maintaining 100% control over player funds.
1. iFrame PostMessage Communication Bus
Games execute inside a secure sandbox iFrame. Communication between the host window and the game canvas occurs over an encrypted PostMessage bus that transmits real-time events such as bet confirmation, cashout requests, and screen resize events.
2. The Four Mandatory REST Endpoints
The operator's backend server must implement four high-availability REST endpoints:
1. GET /api/v1/user/balance - Fetches real-time player wallet funds.
2. POST /api/v1/game/debit - Deducts wager stake when a round starts.
3. POST /api/v1/game/credit - Credits win payouts when a player cashes out.
4. POST /api/v1/game/rollback - Reverts debited funds if a game round aborts due to connectivity loss.
Summary
LuxGame's Seamless Wallet API SDK provides pre-built TypeScript middleware and OpenAPI 3.0 definitions to reduce operator integration timelines to under 5 minutes.