SunCrypto Cryptocurrency Trading Platform

SunCrypto's trading engine connects to exchange liquidity via WebSocket market data feeds, maintaining a real-time order book in memory for each supported trading pair. Buy and sell orders submitted by users are validated against the current order book and executed using a price-time priority matching algorithm — limit orders are matched against the best available opposing orders at the specified price or better, and market orders execute against the order book at the current best available price. Trade confirmations are written to PostgreSQL via a background queue worker, decoupling the latency-sensitive matching engine from the database write path and ensuring that database I/O spikes during high-volume trading periods do not introduce latency into order execution.

KYC compliance for the Indian market is implemented via an integrated Aadhaar verification flow: users upload their Aadhaar card and PAN card, which are processed via an OCR extraction layer to parse identity fields, then submitted to the UIDAI Aadhaar verification API for document authenticity confirmation. The full KYC process is designed to complete in under 5 minutes for users with valid documents. Risk-tiered transaction limits are enforced per KYC verification level: unverified accounts have zero transaction limits, basic KYC allows INR 10,000 daily, and full KYC allows INR 10,00,000 daily — consistent with RBI's virtual digital asset guidelines for Indian exchanges.

Cold storage security architecture sequesters 95% of user funds in offline hardware wallets with multi-signature withdrawal authorization — any withdrawal from cold storage requires cryptographic signatures from 3 of 5 authorised key holders, none of whom can individually authorise a withdrawal. The hot wallet holds only the minimum required for expected daily withdrawal volume, reducing maximum exposure from a hot wallet compromise. 2FA is enforced via TOTP (Google Authenticator compatible) for all login and withdrawal actions, and biometric authentication (Face ID, fingerprint) is available as the primary authentication method on supported iOS and Android devices.