How to Build a 12-Seat Voice Room With WebRTC, Coin Economy, and Moderation

A technical breakdown outlines how to architect a multi-seat social voice room that handles real-time audio, virtual currency, and moderation without compromising performance or safety. For audio routing, the design recommends a Selective Forwarding Unit (SFU) over mesh or MCU topologies, as it limits upstream tracks to a maximum of 12 regardless of audience size. Seat management is treated like a multiplayer game state, with all changes processed server-side using atomic transactions and version-controlled broadcasts to prevent client-side manipulation. Virtual coin gifting is handled entirely on the server, which validates prices, checks balances, and writes immutable ledger entries within a single database transaction to prevent fraud. Moderation is built into the architecture itself, ensuring that revoking a seat also strips the user's SFU publish permission so kicked participants cannot continue speaking.