Multi-broker auth: TOTP, OAuth, and token persistence done right
fintechHow StalkMarket abstracts four Indian broker APIs (Angel One, Upstox, Zerodha, Groww) behind one provider interface — with TOTP, OAuth token injection, persisted tokens, proactive refresh, and a 401 retry path.
#trading · #brokers · #auth · #oauth · #totp · #nodejs