Financial Custody: Managing Balance and Portfolio with Eventual Consistency

Hey folks! Continuing the My Broker B3 series, we've reached one of the most business-logic-rich services in the ecosystem: the Broker Wallet API . In previous posts we built the B3 infrastructure (market price sync and matching engine). Now we enter the financial core of the broker. This service is the guardian of the investor's money and assets — it needs to be correct above all else. 🏦 What is the Wallet API? The trading-broker-wallet is the financial custody service of the ecosystem. Its re