Libraries (src/lib/)

File	Purpose	Key Exports
crypto.ts	AES-256-GCM field encryption with HKDF key derivation	encrypt(), decrypt(), deriveKey()
rbac.ts	RBAC engine: 15 roles, 67 permissions, KV-cached	requirePermission(), assignRole(), createCustomRole(), getUserPermissions()
sessionManager.ts	httpOnly refresh cookie, token rotation, device fingerprinting	createSession(), rotateRefreshToken(), revokeSession()
mfa.ts	TOTP enrollment, verification, backup codes, lockout	generateTOTP(), verifyTOTP(), generateBackupCodes()
accounting.ts	Double-entry engine, 100+ COA templates, GST/TDS computation	createJournalEntry(), computeGST(), computeTDS(), trialBalance()
mediaUpload.ts	Feed media upload to R2 with quota tracking	uploadMedia(), checkQuota()
whatsapp.ts	Meta Cloud API v22.0 integration	sendTemplateMessage(), sendTextMessage(), sendBulk(), checkDelivery()
gstReturns.ts	GSTR-1 + GSTR-3B JSON generation	generateGSTR1(), generateGSTR3B()
tallyExport.ts	Tally 9/Prime XML + CSV export	exportTallyXML(), exportCSV()
shareInvoice.ts	Invoice sharing via WhatsApp/email/UPI	shareViaWhatsApp(), shareViaEmail(), generateUPILink()
receiptPdf.ts	HTML receipt generation with INR amount in words	generateReceipt(), amountInWords()
upi-qr.ts	UPI deep link and QR code generation	generateUPIDeepLink(), generateUPIQR()
dpdp.ts	DPDP Act compliance: consent management, data subject rights	recordConsent(), handleDataRequest(), breachNotification()
razorpay.ts	Razorpay payment gateway integration	createOrder(), verifyPayment(), initiateRefund()

Services (src/services/)

File	Purpose	Key Methods
billingEngine.ts	Monthly maintenance billing automation	Generate invoices, calculate penalties, late fee escalation
taxEngine.ts	GST/TDS computation and compliance	GST calculation, TDS deduction, return preparation
bankReconciliation.ts	Bank statement CSV ingestion + fuzzy matching	Parse CSV, match entries (Levenshtein), flag unmatched
bookingEngine.ts	Facility slot booking with dynamic pricing	Calendar lock, peak pricing, deposit escrow, cancellation refunds
electionEngine.ts	Anonymous elections with Pedersen Commitment	Cast ballot, verify without revealing, count votes
feedEngine.ts	Community feed with H3 Res 8 hyperlocal radius	Create post, feed ranking, media compression pipeline
merchantService.ts	Local merchant marketplace and POS	Register merchant, list deals, book home service
civicEscalation.ts	Civic complaint escalation to municipal authorities	File complaint, SLA monitoring, auto-escalation
authService.ts	Authentication business logic	Register, login, MFA, session lifecycle
aiOrchestrator.ts	AI agent dispatch and orchestration	Route to specialist agent, tool execution, RAG retrieval

Schemas (src/schemas/)

16 Zod validation schema files covering all domains. Each schema validates request bodies, query parameters, and response shapes. Used at the route handler level for input validation.