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MONERO.rst
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=====================================
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Make Post Sell Monero Cash Register
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=====================================
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**The Ultimate Multi-Tenant Cryptocurrency Payment System**
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Overview
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========
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Make Post Sell's Monero integration provides a **revolutionary multi-tenant cryptocurrency cash register** that enables any shop to accept Monero payments with enterprise-grade security, automatic fund management, and real-time payment tracking.
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Our system is **truly amazing** because it solves the complex challenges of cryptocurrency commerce:
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- ✅ **Zero-configuration setup** - Shops enable Monero payments with one click
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- ✅ **Automatic account isolation** - Each shop gets its own dedicated Monero account
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- ✅ **Real-time payment tracking** - Live confirmation monitoring with risk-based thresholds
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- ✅ **Automatic fund sweeping** - Hot wallet funds automatically swept to cold storage
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- ✅ **Multi-tenant security** - Complete financial isolation between shops
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- ✅ **Production-ready scaling** - Handle unlimited shops and payments
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Architecture Overview
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=====================
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Our Monero payment system consists of four key components:
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**1. Hot Wallet Infrastructure**
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- Single `monero-wallet-rpc` service manages all shops
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- Each shop gets a dedicated Monero account (isolated finances)
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- Remote node connectivity (no 150GB+ blockchain storage required)
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- Secure RPC communication with authentication disabled for internal use
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**2. Multi-Tenant Account Management**
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- **Account Creation**: Automatic Monero account creation per shop
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- **Labeling System**: Clean UUID-based labels for machine identification
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- **Tagging System**: Human-readable shop names for easy management
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- **Database Tracking**: Account indices stored in `mps_crypto_processor` table
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**3. Payment Processing Pipeline**
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- **Quote Generation**: Real-time XMR/USD exchange rates with time-limited quotes
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- **Payment Monitoring**: 20-second polling cycle checking for incoming payments
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- **Confirmation Tracking**: Risk-based confirmation requirements (petty/mid/high tiers)
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- **Invoice Finalization**: Automatic product unlocking and email notifications
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**4. Auto-Sweep Security**
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- **Pooled Sweeping**: Multiple payments swept together for efficiency
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- **Account Isolation**: Funds never mix between shops (dedicated accounts)
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- **Cold Storage**: Automatic transfer to shop-configured cold wallet addresses
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- **Network Fee Tracking**: Comprehensive fee monitoring for accounting
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Multi-Tenant Magic
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==================
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What makes our system **truly amazing** is the multi-tenant architecture:
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**Account Isolation**
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---------------------
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Each shop operates in complete financial isolation:
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.. code-block:: text
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Wallet Structure:
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├── Account 0: Primary (system)
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├── Account 1: Shop A (media.unturf.com)
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├── Account 2: Shop B (example-store.com)
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├── Account 3: Shop C (crypto-shop.net)
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└── Account N: Shop N...
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**Database Schema**
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-------------------
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.. code-block:: sql
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-- Shop crypto processor configuration
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CREATE TABLE mps_crypto_processor (
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id UUID PRIMARY KEY,
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shop_id UUID NOT NULL,
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coin_type VARCHAR(32) NOT NULL, -- 'XMR'
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wallet_label VARCHAR(128) NOT NULL, -- Account index: "1", "2", "3"...
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sweep_to_address VARCHAR(256) NOT NULL, -- Cold wallet address
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enabled BOOLEAN DEFAULT TRUE
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);
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-- Individual payment tracking
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CREATE TABLE mps_crypto_payment (
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id UUID PRIMARY KEY,
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invoice_id UUID NOT NULL,
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account_index INTEGER NOT NULL, -- Links to wallet account
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expected_amount BIGINT NOT NULL, -- Atomic units (piconero)
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received_amount BIGINT DEFAULT 0,
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current_confirmations INTEGER DEFAULT 0,
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status VARCHAR(32), -- pending/received/confirmed
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swept_amount BIGINT, -- Amount swept to cold storage
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swept_tx_hash VARCHAR(128) -- Sweep transaction hash
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);
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**Payment Flow**
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================
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The complete payment lifecycle demonstrates the system's sophistication:
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**1. Shop Setup (One-Time)**
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- Shop owner enters cold wallet address
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- System creates dedicated Monero account automatically
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- Account tagged with shop domain for identification
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**2. Customer Checkout**
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- Real-time XMR/USD rate fetched from CoinGecko
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- Quote generated with 15-minute expiration
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- Unique subaddress created for this specific payment
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- Customer sees QR code + payment details
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**3. Payment Monitoring**
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- Crypto watcher polls every 20 seconds
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- Checks all pending payments across all shops
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- Updates confirmation counts as blocks are found
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- Applies risk-based confirmation requirements:
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- **Petty** (< $10): 2 confirmations
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- **Mid** ($10-$100): 10 confirmations
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- **High** (> $100): 20 confirmations
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**4. Payment Confirmation**
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- Payment status: ``pending`` → ``received`` → ``confirmed``
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- Invoice automatically finalized when confirmed
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- Digital products unlocked instantly
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- Physical products trigger inventory deduction
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- Purchase and sale emails sent automatically
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**5. Auto-Sweep to Cold Storage**
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- Confirmed payments trigger automatic sweep
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- All unlocked funds in shop's account swept together
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- Efficient: Not 1:1 payment-to-sweep mapping
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- Secure: Funds immediately moved to shop's cold wallet
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- Trackable: Sweep transaction hash recorded
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Risk Management
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===============
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Our system implements sophisticated risk management:
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**Confirmation Tiers**
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----------------------
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Shop-configurable thresholds determine confirmation requirements:
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.. code-block:: ini
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# Shop settings (per-shop configuration)
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payment_risk_threshold_mid_cents = 1000 # $10.00
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payment_risk_threshold_high_cents = 10000 # $100.00
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# Global Monero confirmation requirements
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monero.confirmations.petty = 2 # < $10: Fast confirmation
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monero.confirmations.mid = 10 # $10-$100: Standard security
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monero.confirmations.high = 20 # > $100: Maximum security
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**Overpayment Handling**
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------------------------
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- Automatic overpayment detection
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- Optional refund to customer-provided address
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- Graceful handling when no refund address provided
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- Status tracking: ``confirmed_overpaid`` for accounting
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**Quote Expiration**
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--------------------
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- Time-limited quotes prevent rate manipulation
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- Configurable expiration (default: 15 minutes)
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- Automatic quote renewal for valid payments
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- Expired payment refund system (when refund address available)
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Technology Stack
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================
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**Infrastructure**
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- **monero-wallet-rpc**: Official Monero wallet daemon
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- **Remote Nodes**: Public Monero nodes (no local blockchain required)
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- **Salt Stack**: Automated deployment and configuration management
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- **systemd**: Service management with automatic restart
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**Security Features**
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- **Account Isolation**: Dedicated Monero accounts per shop
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- **RPC Authentication**: Disabled for internal communication, secured by network isolation
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- **Automatic Sweeping**: Immediate cold storage transfer
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- **Network Hardening**: Localhost-only RPC binding
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**Monitoring & Reliability**
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- **Health Checks**: Automatic service monitoring via Salt
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- **Error Recovery**: Graceful handling of network issues and daemon disconnects
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- **Logging**: Comprehensive payment and sweep transaction logging
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- **Backup Systems**: Database backups and wallet file protection
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Configuration
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=============
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**Environment Variables**
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.. code-block:: bash
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# Payment method toggles
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export MPS_PAYMENTS_MONERO_ENABLED=True
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export MPS_PAYMENTS_STRIPE_ENABLED=True
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# Monero RPC configuration
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export MPS_MONERO_RPC_URL=http://127.0.0.1:18083/json_rpc
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export MPS_MONERO_RPC_USER= # Empty - no auth required
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export MPS_MONERO_RPC_PASS= # Empty - no auth required
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# Confirmation requirements
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export MPS_MONERO_CONFIRMATIONS_PETTY=2
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export MPS_MONERO_CONFIRMATIONS_MID=10
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export MPS_MONERO_CONFIRMATIONS_HIGH=20
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**Salt State Management**
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.. code-block:: bash
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# Deploy Monero infrastructure
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salt 'mps-servers*' state.apply monero
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# Deploy payment watcher
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salt 'mps-servers*' state.apply monero.crypto-watcher
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**Service Management**
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.. code-block:: bash
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# Check Monero wallet status
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systemctl status monero-wallet-rpc.service
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# Check payment watcher
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systemctl status mps-crypto-watcher.service
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# View payment processing logs
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journalctl -fu mps-crypto-watcher.service
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Why This Is Amazing
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===================
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**For Shop Owners**
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- **Zero Crypto Knowledge Required**: Enable Monero payments with one click
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- **Complete Financial Control**: Direct payments to your cold wallet
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- **Instant Setup**: No wallet management or blockchain syncing
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- **Enterprise Security**: Bank-grade isolation and automatic fund management
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- **Global Reach**: Accept payments from anywhere, anytime
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**For Customers**
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- **True Privacy**: Monero's built-in privacy features
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- **Low Fees**: Minimal network fees compared to traditional payments
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- **Fast Confirmation**: Risk-based confirmation for quick small purchases
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- **Global Access**: No geographic restrictions or banking requirements
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**For Developers**
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- **Production Ready**: Handle unlimited shops and payment volume
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- **Clean Architecture**: Well-separated concerns and modular design
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- **Comprehensive APIs**: Full payment lifecycle management
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- **Monitoring Built-in**: Real-time payment tracking and status updates
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- **Extensible Design**: Easy to add new cryptocurrencies
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**For Platform Operators**
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- **Single Infrastructure**: One wallet serves unlimited shops
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- **Automatic Scaling**: No per-shop setup or maintenance required
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- **Security by Design**: Account isolation prevents fund mixing
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- **Operational Excellence**: Automated deployment and monitoring
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The Result: A truly **amazing** multi-tenant cryptocurrency cash register that makes Monero payments as easy as traditional payment processing, while maintaining the privacy, security, and decentralization that makes cryptocurrency revolutionary.
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**Welcome to the future of commerce.** 🚀
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