# LaganBook - Complete Architecture, Feature Inventory & Operational Manual

> LaganBook is India's premier mobile ERP and business operations management platform purpose-built for Event Contractors, Tent House & Shamiana businesses, DJ & Sound Rental operators, Catering & Halwai services, Stage Decorators, and Silent Generator suppliers. Headquartered in Indore, Madhya Pradesh, India.

- **Product**: LaganBook
- **Headquarters**: Indore, Madhya Pradesh, India
- **Official Website**: [https://www.laganbook.com](https://www.laganbook.com)
- **Support Email**: [support@laganbook.com](mailto:support@laganbook.com)
- **Privacy Policy**: [https://www.laganbook.com/privacy-policy](https://www.laganbook.com/privacy-policy)
- **Terms of Service**: [https://www.laganbook.com/terms-of-service](https://www.laganbook.com/terms-of-service)
- **Account Deletion**: [https://www.laganbook.com/delete-account](https://www.laganbook.com/delete-account)

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## 1. Executive Summary & Mobile App Architecture

LaganBook eliminates physical paper diaries, unorganized WhatsApp chats, missing inventory in godowns, and uncollected client payments.

The mobile app (`/apps/mobile`) is built with:
- **Local SQLite Cache Engine**: 100% offline functionality in rural marriage gardens, farmhouses, and basement godowns with zero internet.
- **Background Sync Protocol**: Automatic transactional synchronization once 4G/5G or Wi-Fi is detected.
- **ESC/POS Bluetooth Thermal Printing**: Native wireless 58mm & 80mm receipt and gate pass printing with Indian number-to-words in English & Hindi ('पाँच हज़ार दो सौ रुपये मात्र').
- **Hierarchical Tree Quotations & Invoicing**: Ritual-by-ritual breakdown with dynamic on-invoice UPI Payment QR Codes for instant PhonePe/Google Pay/Paytm collection.
- **9 Standard Accounting Vouchers & Daily Day Book**: Receipt, Payment, Contra, Purchase, Sales, Journal, Credit Note, Debit Note, and chronological Day Book passbook.
- **Item Groups & Unlimited Indian & Custom Measurement Units (UOMs)**: SqFt, Nag/Pcs, KVA, Set, Plate, Pax, Running Feet (RFT), Ton, Trip, Half-Day, Quintal, and user-defined UOMs.
- **Multi-Godown Warehouse & Vehicle Dispatch Engine**: 4-stage lifecycle (`LOADING` ➔ `DISPATCHED` ➔ `AT_VENUE` ➔ `RETURNED`), driver tracking, and return reconciliation.
- **9 Regional Languages**: Hinglish, Hindi, Marathi, Gujarati, Punjabi, Bengali, Tamil, Telugu, English.
- **Multi-Role Staff Access Control**: Owner, Branch Manager, Munshi/Supervisor, Driver, DJ Technician, Halwai Head.

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## 2. Comprehensive Module-by-Module Breakdown

### Module A: Multi-Godown Warehouse & Vehicle Dispatch Gate Pass
1. **Multi-Location Storage**: Track inventory across Main Godown, Highway Shed, City Storage, and Repair Workshops.
2. **Vehicle Allocation**: Assign truck type (Tata 407, Mahindra Bolero Pickup, E-Loader, 20ft Truck), driver name, driver mobile phone, and vehicle registration number (RJ, MP, UP, MH, DL, GJ series).
3. **Dispatch Lifecycle**:
   - `LOADING`: Warehouse crew packs equipment using nag-by-nag verified checklist.
   - `DISPATCHED`: Vehicle exits godown; 1-click WhatsApp Gate Pass sent to driver and client.
   - `AT_VENUE`: Crew arrives on-site for staging/installation.
   - `RETURNED`: Breakdown and return count verification to catch damaged or missing items before releasing drivers.
4. **Time Slot Presets**: Early Morning (06:00 AM), Morning Setup (08:00 AM), Pre-Lunch (11:00 AM), Afternoon (02:00 PM), Evening Grand (05:00 PM), Night Show (08:00 PM), Breakdown (11:30 PM).

### Module B: 9-Voucher Double-Entry Accounting Hub & Daily Day Book
1. **Standard Voucher System**:
   - `RECEIPT (रसीद)`: Advance token deposits, stage booking balance payments, bank/cash inflows.
   - `PAYMENT (भुगतान)`: Daily labor wages, diesel for gensets, truck rental, warehouse rent, tea & refreshments.
   - `CONTRA (कॉन्ट्रा)`: Bank cash deposits, ATM withdrawals, Bank ⇋ Galla (Cash Box) fund transfers.
   - `PURCHASE (खरीद बिल)`: Equipment, light fixtures, line-array spares, fabric, and raw material purchase bills.
   - `SALES INVOICE (बिक्री बिल)`: GST and non-GST event booking client invoices.
   - `JOURNAL (जर्नल JV)`: Party-to-party balance adjustments, depreciation, barter settlements, non-cash entries.
   - `CREDIT NOTE (क्रेडिट नोट)`: Client rate concessions, post-event cancellations, service rebates.
   - `DEBIT NOTE (डेबिट नोट)`: Supplier damage claims, rate difference deductions, purchase returns.
2. **Daily Day Book (दैनिक रोज़नामचा)**: Chronological ledger passbook tracking all debit and credit movements with live cash-in-hand (गल्ला) balance.
3. **Party Khata**: Complete ledger tracking for clients and vendors with 1-click WhatsApp balance payment reminders.
4. **Indian Financial Year Engine**: Strict data separation by FY (1 Apr - 31 Mar, e.g. FY 2024-25, FY 2025-26) with Q1-Q4 quarterly breakdown.
5. **Financial & Tax Reports**: Profit & Loss (P&L), Balance Sheet, Trial Balance, GSTR-1 & GSTR-3B tax summaries.

### Module C: ESC/POS Wireless Bluetooth Thermal Receipt Printer
1. **Hardware Integration**: Connects to 58mm and 80mm wireless Bluetooth thermal printers.
2. **Dual Language Words Engine**: Automatic Indian currency conversion ('पाँच हज़ार दो सौ रुपये मात्र' / 'Five Thousand Two Hundred Rupees Only').
3. **Receipt Types**: Instant Advance Token Slips, Transport Challans, Godown Gate Passes, and Cash Settlement Slips.
4. **Signatures**: Formatted customer signature and authorized signatory seal blocks.

### Module D: Pre-Built Masters + Unlimited Custom Items, Item Groups & Services
1. **Pre-Loaded Starter Masters (Item Groups, Catalog Items & Services)**:
   - Tent & Pandal Structures (Shamiana, Waterproof Pandal, German Hanger, Wooden Stage, MS Pipes, Draping)
   - Furniture & Seating (Maharaja Sofa, Chiavari Chairs, Banquet Chairs with Covers, Round Tables with Frills)
   - DJ & Sound Systems (Line Array JBL/RCF Tops, Dual 18" Bass Subs, Mixers, Cordless Wireless Mics)
   - Event Lighting & Truss (Sharpie Moving Heads, Par LED, Laser System, Warm Ambience, DMX Console)
   - Catering & Crockery (SS Chafing Dishes, Bone China/Melamine Plates, Cooking Bhatti, Deg/Handi, Trays)
   - Generator Power (Silent DG Gensets 15 to 250 KVA, Copper Power Cables, Changeover Panels)
   - Climate Control (Industrial Mist Fans, Tower ACs, Ducting AC, Halogen Patio Heaters)
   - Stage Decor (Mandap Fiber/Wood, Varmala Hydraulic Revolving Stage, Flower Arch Entry, Backdrops)
   - Pyro & Special Effects (Cold Pyro Sparkulars, Dry Ice Matka Fog, Confetti Blasters, CO2 Jet Cannons)
   - Transport Logistics (Pickup Vans, E-Loaders, Trucks).
2. **Unlimited Custom Creation by User**:
   - **Custom Item Groups**: Users can create unlimited custom Item Groups with custom icons, theme colors, and category tags.
   - **Custom Items**: Add unlimited items with custom daily rental rates, purchase costs, replacement costs, English/Hindi names, serial numbers, and storage tags.
   - **Custom Service Categories & Subcategories**: Create custom main categories (e.g., Drone Shows, Special Entries, Artist Management) and link them directly to accounting income ledgers.
   - **Service Package Bundles**: Combine multiple physical items into packaged service setups (e.g. Royal Mandap Package, Sangeet Truss & Audio Setup).
3. **Native Indian Trade Units (UOMs) + Unlimited Custom Units**:
   - Area/Length: SqFt, SqYd, RFT, RM, MTR, FT, IN.
   - Counting: PCS, NOS, SET, PAIR, DZ.
   - Power: KVA, KW, W.
   - Catering: PLATE, PAX, GUEST, TABLE, CHAIR, TRAY, GLASS, BOTTLE.
   - Weight/Volume: KG, QTL, TON, GM, LTR, ML.
   - Duration: HR, HALF_DAY, DAY, NIGHT.
   - Logistics: TRIP, KM.
   - Packaging: CRATE, CTN, BOX, BUNDLE, ROLL, PACK.
   - Contract: EVENT, FUNCTION, JOB, SERVICE, PACKAGE, BOOKING.
   - Custom UOMs: User can register custom units anytime.

### Module E: Hierarchical Tree Quotations & Invoices with Dynamic UPI QR
1. **Ritual Hierarchy**: Groups items by sub-events (Haldi, Sangeet, Wedding, Reception) with itemized service setups.
2. **Dynamic UPI QR Code**: Embedded UPI intent string (`upi://pay?pa=...`) for instant 1-tap payment via PhonePe, Google Pay, Paytm, BHIM.
3. **Dual Language Names**: English and Hindi item names printed side-by-side for full transparency.
4. **Terms & Conditions**: Pre-configured customizable legal clauses for advance token non-refundability, diesel supply, electricity provisions, and damage penalties.

### Module F: 9 Indian Regional Languages
- Hinglish (हिंग्लिश)
- Hindi (हिंदी)
- Marathi (मराठी)
- Gujarati (ગુજરાતી)
- Punjabi (ਪੰਜਾਬੀ)
- Bengali (বাংলা)
- Tamil (தமிழ்)
- Telugu (తెలుగు)
- English

### Module G: 100% Offline SQLite Cache Engine
- Works in 0-bar network areas (basements, remote farms, rural banquet lawns).
- Full local SQLite database on Android and iOS.
- Instant UI response with automatic sync when network resumes.

### Module H: AI Stock Clash & Muhurat Conflict Detector
- Real-time stock conflict detection across overlapping event dates.
- Proactive suggestions to sub-lease inventory or reallocate across godowns.

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## 3. SEO & Semantic Sitemap Index

- [LaganBook Homepage](https://www.laganbook.com/): Official platform homepage for Indian event contractors, decorators, and rental businesses.
- [Features Inventory](https://www.laganbook.com/features): All features, mobile app capabilities, and operational tools.
- [Free Templates Hub](https://www.laganbook.com/templates): Ready-to-use quotation, invoice, gate pass, and ledger templates.
- [City Solutions Directory](https://www.laganbook.com/solutions/locations): Directory of specialized event contractor software across 120+ Indian cities and wedding hubs.
- [About Us](https://www.laganbook.com/about): Mission and leadership of LaganBook in Indore, Madhya Pradesh.
- [Contact & Support](https://www.laganbook.com/contact): Customer service and vendor support.
- [Privacy Policy](https://www.laganbook.com/privacy-policy): Data privacy and security standards.
- [Terms of Service](https://www.laganbook.com/terms-of-service): Legal terms and subscriber policies.
- [Account Deletion](https://www.laganbook.com/delete-account): Self-service account and data deletion procedures.