Replacing Stripe with NanoPay.js and Nano RPC Checkout

Meet Jennifer, a developer who built a successful SaaS platform using Stripe for payments. After years of paying 2.9% + $0.30 per transaction and dealing with chargebacks, she decided to migrate to NanoPay.js and Nano RPC Checkout for a more efficient, cost-effective payment system.

This guide shows how Jennifer successfully migrated her entire payment infrastructure from Stripe to Nano, reducing costs by 100% while improving user experience.

The Stripe Migration Challenge

Jennifer faced several challenges with her Stripe implementation:

• High fees: 2.9% + $0.30 per transaction eating into profits
• Chargebacks: Customers could dispute payments months later
• Geographic restrictions: Some customers couldn't pay from certain countries
• Complex webhooks: Difficult to handle payment status updates
• PCI compliance: Required for handling credit card data
• Slow settlements: 2-7 business days for fund availability

The Nano Solution: Complete Payment Replacement

Jennifer replaced Stripe with a comprehensive Nano payment system:

Migration Architecture Overview

// Nano Payment System Architecture
class NanoPaymentSystem {
    constructor() {
        this.nanoPay = window.NanoPay;
        this.checkoutAPI = 'https://api.nano.to/checkout';
        this.rpcEndpoint = 'https://rpc.nano.to';
        this.webhookSecret = process.env.NANO_WEBHOOK_SECRET;
    }
    
    // Replace Stripe Payment Intent
    async createPaymentIntent(amount, currency, metadata = {}) {
        try {
            // Convert amount to NANO
            const nanoAmount = this.convertToNano(amount, currency);
            
            // Create Nano payment session
            const paymentSession = await this.createNanoPaymentSession({
                amount: nanoAmount,
                metadata: metadata,
                successUrl: metadata.successUrl,
                cancelUrl: metadata.cancelUrl
            });
            
            return {
                id: paymentSession.id,
                amount: nanoAmount,
                currency: 'NANO',
                status: 'requires_payment_method',
                client_secret: paymentSession.clientSecret,
                payment_method_types: ['nano'],
                metadata: metadata
            };
            
        } catch (error) {
            console.error('Payment intent creation error:', error);
            throw error;
        }
    }
    
    // Replace Stripe Checkout Session
    async createCheckoutSession(lineItems, successUrl, cancelUrl, metadata = {}) {
        try {
            // Convert line items to Nano format
            const nanoLineItems = this.convertLineItemsToNano(lineItems);
            
            // Calculate total amount
            const totalAmount = nanoLineItems.reduce((sum, item) => sum + item.price, 0);
            
            // Create Nano checkout session
            const checkoutSession = await this.createNanoCheckoutSession({
                lineItems: nanoLineItems,
                totalAmount: totalAmount,
                successUrl: successUrl,
                cancelUrl: cancelUrl,
                metadata: metadata
            });
            
            return {
                id: checkoutSession.id,
                url: checkoutSession.url,
                amount_total: totalAmount,
                currency: 'NANO',
                payment_status: 'unpaid',
                metadata: metadata
            };
            
        } catch (error) {
            console.error('Checkout session creation error:', error);
            throw error;
        }
    }
    
    // Replace Stripe Webhook Handler
    async handleWebhook(payload, signature) {
        try {
            // Verify webhook signature
            const isValid = this.verifyWebhookSignature(payload, signature);
            if (!isValid) {
                throw new Error('Invalid webhook signature');
            }
            
            const event = JSON.parse(payload);
            
            // Handle different event types
            switch (event.type) {
                case 'payment.completed':
                    await this.handlePaymentCompleted(event.data);
                    break;
                case 'payment.failed':
                    await this.handlePaymentFailed(event.data);
                    break;
                case 'payment.cancelled':
                    await this.handlePaymentCancelled(event.data);
                    break;
                default:
                    console.log('Unhandled event type:', event.type);
            }
            
            return { received: true };
            
        } catch (error) {
            console.error('Webhook handling error:', error);
            throw error;
        }
    }
    
    // Convert amount to NANO
    convertToNano(amount, currency) {
        const exchangeRates = {
            'USD': 0.5, // 1 NANO = $0.50 (example rate)
            'EUR': 0.45,
            'GBP': 0.40,
            'JPY': 75
        };
        
        const rate = exchangeRates[currency] || 0.5;
        return parseFloat((amount / rate).toFixed(6));
    }
    
    // Convert line items to Nano format
    convertLineItemsToNano(lineItems) {
        return lineItems.map(item => ({
            name: item.name,
            price: this.convertToNano(item.amount, 'USD'),
            quantity: item.quantity || 1,
            description: item.description
        }));
    }
}

Step 1: Stripe to Nano Migration Service

Jennifer created a comprehensive migration service:

// Stripe to Nano Migration Service
class StripeToNanoMigration {
    constructor() {
        this.nanoPaymentSystem = new NanoPaymentSystem();
        this.migrationLog = [];
    }
    
    // Migrate Stripe Payment Intent
    async migratePaymentIntent(stripePaymentIntent) {
        try {
            const migrationId = this.generateMigrationId();
            
            // Log migration start
            this.logMigration(migrationId, 'payment_intent', 'started', stripePaymentIntent);
            
            // Create equivalent Nano payment
            const nanoPayment = await this.nanoPaymentSystem.createPaymentIntent(
                stripePaymentIntent.amount,
                stripePaymentIntent.currency,
                stripePaymentIntent.metadata
            );
            
            // Update migration log
            this.logMigration(migrationId, 'payment_intent', 'completed', {
                stripeId: stripePaymentIntent.id,
                nanoId: nanoPayment.id,
                amount: nanoPayment.amount
            });
            
            return {
                migrationId: migrationId,
                stripePaymentIntent: stripePaymentIntent,
                nanoPayment: nanoPayment,
                status: 'migrated'
            };
            
        } catch (error) {
            console.error('Payment intent migration error:', error);
            this.logMigration(migrationId, 'payment_intent', 'failed', error.message);
            throw error;
        }
    }
    
    // Migrate Stripe Checkout Session
    async migrateCheckoutSession(stripeCheckoutSession) {
        try {
            const migrationId = this.generateMigrationId();
            
            // Log migration start
            this.logMigration(migrationId, 'checkout_session', 'started', stripeCheckoutSession);
            
            // Create equivalent Nano checkout session
            const nanoCheckoutSession = await this.nanoPaymentSystem.createCheckoutSession(
                stripeCheckoutSession.line_items,
                stripeCheckoutSession.success_url,
                stripeCheckoutSession.cancel_url,
                stripeCheckoutSession.metadata
            );
            
            // Update migration log
            this.logMigration(migrationId, 'checkout_session', 'completed', {
                stripeId: stripeCheckoutSession.id,
                nanoId: nanoCheckoutSession.id,
                amount: nanoCheckoutSession.amount_total
            });
            
            return {
                migrationId: migrationId,
                stripeCheckoutSession: stripeCheckoutSession,
                nanoCheckoutSession: nanoCheckoutSession,
                status: 'migrated'
            };
            
        } catch (error) {
            console.error('Checkout session migration error:', error);
            this.logMigration(migrationId, 'checkout_session', 'failed', error.message);
            throw error;
        }
    }
    
    // Migrate Stripe Customer
    async migrateCustomer(stripeCustomer) {
        try {
            const migrationId = this.generateMigrationId();
            
            // Log migration start
            this.logMigration(migrationId, 'customer', 'started', stripeCustomer);
            
            // Create Nano customer profile
            const nanoCustomer = await this.createNanoCustomer({
                email: stripeCustomer.email,
                name: stripeCustomer.name,
                metadata: stripeCustomer.metadata,
                stripeId: stripeCustomer.id
            });
            
            // Update migration log
            this.logMigration(migrationId, 'customer', 'completed', {
                stripeId: stripeCustomer.id,
                nanoId: nanoCustomer.id,
                email: nanoCustomer.email
            });
            
            return {
                migrationId: migrationId,
                stripeCustomer: stripeCustomer,
                nanoCustomer: nanoCustomer,
                status: 'migrated'
            };
            
        } catch (error) {
            console.error('Customer migration error:', error);
            this.logMigration(migrationId, 'customer', 'failed', error.message);
            throw error;
        }
    }
    
    // Generate migration ID
    generateMigrationId() {
        return `mig_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
    }
    
    // Log migration
    logMigration(migrationId, type, status, data) {
        const logEntry = {
            migrationId: migrationId,
            type: type,
            status: status,
            timestamp: Date.now(),
            data: data
        };
        
        this.migrationLog.push(logEntry);
        console.log('Migration Log:', logEntry);
    }
    
    // Get migration report
    getMigrationReport() {
        const report = {
            totalMigrations: this.migrationLog.length,
            successfulMigrations: this.migrationLog.filter(log => log.status === 'completed').length,
            failedMigrations: this.migrationLog.filter(log => log.status === 'failed').length,
            migrationTypes: this.getMigrationTypeStats(),
            recentMigrations: this.migrationLog.slice(-10)
        };
        
        return report;
    }
    
    // Get migration type statistics
    getMigrationTypeStats() {
        const types = {};
        
        this.migrationLog.forEach(log => {
            if (!types[log.type]) {
                types[log.type] = { total: 0, successful: 0, failed: 0 };
            }
            
            types[log.type].total++;
            if (log.status === 'completed') {
                types[log.type].successful++;
            } else if (log.status === 'failed') {
                types[log.type].failed++;
            }
        });
        
        return types;
    }
}

const migrationService = new StripeToNanoMigration();

Step 2: Frontend Payment Integration

Jennifer created a seamless frontend integration:

// Frontend Payment Integration
class FrontendPaymentIntegration {
    constructor() {
        this.nanoPaymentSystem = new NanoPaymentSystem();
        this.currentPayment = null;
    }
    
    // Replace Stripe Payment Element
    async initializePaymentElement(containerId, paymentIntent) {
        try {
            // Create Nano payment container
            const container = document.getElementById(containerId);
            container.innerHTML = '';
            
            // Create Nano payment button
            const paymentButton = document.createElement('div');
            paymentButton.className = 'nano-payment-button';
            paymentButton.innerHTML = `
                <div class="payment-info">
                    <div class="amount">${paymentIntent.amount} NANO</div>
                    <div class="description">Complete your payment</div>
                </div>
                <button class="pay-button" onclick="frontendPayment.openPaymentModal()">
                    Pay with Nano
                </button>
            `;
            
            container.appendChild(paymentButton);
            
            // Store payment intent
            this.currentPayment = paymentIntent;
            
        } catch (error) {
            console.error('Payment element initialization error:', error);
            throw error;
        }
    }
    
    // Open Nano payment modal
    async openPaymentModal() {
        try {
            if (!this.currentPayment) {
                throw new Error('No payment intent available');
            }
            
            // Open NanoPay modal
            this.nanoPaymentSystem.nanoPay.open({
                title: 'Complete Payment',
                amount: this.currentPayment.amount,
                address: this.getPaymentAddress(),
                description: 'Complete your payment with Nano',
                success: async (block) => {
                    console.log('Payment successful:', block);
                    
                    // Handle successful payment
                    await this.handlePaymentSuccess(block);
                    
                },
                cancel: () => {
                    console.log('Payment cancelled');
                    this.handlePaymentCancelled();
                },
                expired: () => {
                    console.log('Payment expired');
                    this.handlePaymentExpired();
                }
            });
            
        } catch (error) {
            console.error('Payment modal error:', error);
            alert('Failed to open payment modal. Please try again.');
        }
    }
    
    // Handle successful payment
    async handlePaymentSuccess(block) {
        try {
            // Verify payment with backend
            const verification = await this.verifyPayment(block);
            
            if (verification.success) {
                // Show success message
                this.showPaymentSuccess(verification);
                
                // Redirect to success page
                if (this.currentPayment.metadata.successUrl) {
                    window.location.href = this.currentPayment.metadata.successUrl;
                }
            } else {
                alert('Payment verification failed. Please contact support.');
            }
            
        } catch (error) {
            console.error('Payment success handling error:', error);
            alert('Payment processing error. Please contact support.');
        }
    }
    
    // Verify payment with backend
    async verifyPayment(block) {
        try {
            const response = await fetch('/api/payments/verify', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                    paymentIntentId: this.currentPayment.id,
                    blockHash: block.block.hash,
                    amount: block.block.amount
                })
            });
            
            const data = await response.json();
            return data;
            
        } catch (error) {
            console.error('Payment verification error:', error);
            return { success: false, error: 'Verification failed' };
        }
    }
    
    // Show payment success
    showPaymentSuccess(verification) {
        const successModal = document.createElement('div');
        successModal.className = 'payment-success-modal';
        successModal.innerHTML = `
            <div class="modal-content">
                <h2>🎉 Payment Successful!</h2>
                <p>Your payment has been processed successfully.</p>
                <p><strong>Transaction Hash:</strong> ${verification.blockHash}</p>
                <p><strong>Amount:</strong> ${verification.amount} NANO</p>
                <button onclick="this.parentElement.parentElement.remove()">Continue</button>
            </div>
        `;
        document.body.appendChild(successModal);
    }
    
    // Handle payment cancelled
    handlePaymentCancelled() {
        alert('Payment was cancelled. You can try again anytime.');
    }
    
    // Handle payment expired
    handlePaymentExpired() {
        alert('Payment expired. Please try again.');
    }
    
    // Get payment address
    getPaymentAddress() {
        // This would typically come from your backend
        return 'nano_1payment1234567890abcdefghijklmnopqrstuvwxyz';
    }
}

// Initialize frontend payment integration
const frontendPayment = new FrontendPaymentIntegration();

Step 3: Backend API Migration

Jennifer created a comprehensive backend API for the migration:

const express = require('express');
const app = express();

// Initialize services
const nanoPaymentSystem = new NanoPaymentSystem();
const migrationService = new StripeToNanoMigration();

// Create payment intent (replaces Stripe)
app.post('/api/payments/create-payment-intent', async (req, res) => {
    try {
        const { amount, currency, metadata } = req.body;
        
        // Create Nano payment intent
        const paymentIntent = await nanoPaymentSystem.createPaymentIntent(
            amount,
            currency,
            metadata
        );
        
        res.json({
            success: true,
            paymentIntent
        });
        
    } catch (error) {
        console.error('Payment intent creation error:', error);
        res.status(500).json({ error: 'Failed to create payment intent' });
    }
});

// Create checkout session (replaces Stripe)
app.post('/api/checkout/create-session', async (req, res) => {
    try {
        const { lineItems, successUrl, cancelUrl, metadata } = req.body;
        
        // Create Nano checkout session
        const checkoutSession = await nanoPaymentSystem.createCheckoutSession(
            lineItems,
            successUrl,
            cancelUrl,
            metadata
        );
        
        res.json({
            success: true,
            checkoutSession
        });
        
    } catch (error) {
        console.error('Checkout session creation error:', error);
        res.status(500).json({ error: 'Failed to create checkout session' });
    }
});

// Verify payment (replaces Stripe webhook)
app.post('/api/payments/verify', async (req, res) => {
    try {
        const { paymentIntentId, blockHash, amount } = req.body;
        
        // Verify payment with Nano RPC
        const verification = await nanoPaymentSystem.verifyPayment(
            paymentIntentId,
            blockHash,
            amount
        );
        
        if (verification.success) {
            // Update payment status in database
            await this.updatePaymentStatus(paymentIntentId, 'succeeded', {
                blockHash: blockHash,
                amount: amount,
                verifiedAt: Date.now()
            });
            
            res.json({
                success: true,
                verified: true,
                blockHash: blockHash,
                amount: amount
            });
        } else {
            res.json({
                success: true,
                verified: false,
                error: verification.error
            });
        }
        
    } catch (error) {
        console.error('Payment verification error:', error);
        res.status(500).json({ error: 'Payment verification failed' });
    }
});

// Handle Nano webhooks
app.post('/api/webhooks/nano', async (req, res) => {
    try {
        const signature = req.headers['nano-signature'];
        const payload = JSON.stringify(req.body);
        
        // Handle webhook
        const result = await nanoPaymentSystem.handleWebhook(payload, signature);
        
        res.json(result);
        
    } catch (error) {
        console.error('Webhook handling error:', error);
        res.status(400).json({ error: 'Webhook handling failed' });
    }
});

// Migration endpoints
app.post('/api/migration/payment-intent', async (req, res) => {
    try {
        const { stripePaymentIntent } = req.body;
        
        // Migrate payment intent
        const migration = await migrationService.migratePaymentIntent(stripePaymentIntent);
        
        res.json({
            success: true,
            migration
        });
        
    } catch (error) {
        console.error('Payment intent migration error:', error);
        res.status(500).json({ error: 'Migration failed' });
    }
});

app.post('/api/migration/checkout-session', async (req, res) => {
    try {
        const { stripeCheckoutSession } = req.body;
        
        // Migrate checkout session
        const migration = await migrationService.migrateCheckoutSession(stripeCheckoutSession);
        
        res.json({
            success: true,
            migration
        });
        
    } catch (error) {
        console.error('Checkout session migration error:', error);
        res.status(500).json({ error: 'Migration failed' });
    }
});

// Get migration report
app.get('/api/migration/report', async (req, res) => {
    try {
        const report = migrationService.getMigrationReport();
        
        res.json({
            success: true,
            report
        });
        
    } catch (error) {
        console.error('Migration report error:', error);
        res.status(500).json({ error: 'Failed to get migration report' });
    }
});

Step 4: Database Schema Migration

Jennifer designed a database schema to replace Stripe data:

// Database Schema for Nano Payments
const mongoose = require('mongoose');

// Payment Intent Schema (replaces Stripe Payment Intent)
const PaymentIntentSchema = new mongoose.Schema({
    id: {
        type: String,
        required: true,
        unique: true
    },
    amount: {
        type: Number,
        required: true
    },
    currency: {
        type: String,
        default: 'NANO'
    },
    status: {
        type: String,
        enum: ['requires_payment_method', 'requires_confirmation', 'requires_action', 'processing', 'succeeded', 'canceled'],
        default: 'requires_payment_method'
    },
    clientSecret: {
        type: String,
        required: true
    },
    paymentAddress: {
        type: String,
        required: true
    },
    metadata: {
        type: Map,
        of: String
    },
    stripeId: {
        type: String,
        default: null
    },
    createdAt: {
        type: Date,
        default: Date.now
    },
    updatedAt: {
        type: Date,
        default: Date.now
    }
});

// Checkout Session Schema (replaces Stripe Checkout Session)
const CheckoutSessionSchema = new mongoose.Schema({
    id: {
        type: String,
        required: true,
        unique: true
    },
    url: {
        type: String,
        required: true
    },
    amountTotal: {
        type: Number,
        required: true
    },
    currency: {
        type: String,
        default: 'NANO'
    },
    paymentStatus: {
        type: String,
        enum: ['unpaid', 'paid', 'no_payment_required'],
        default: 'unpaid'
    },
    lineItems: [{
        name: String,
        price: Number,
        quantity: Number,
        description: String
    }],
    successUrl: {
        type: String,
        required: true
    },
    cancelUrl: {
        type: String,
        required: true
    },
    metadata: {
        type: Map,
        of: String
    },
    stripeId: {
        type: String,
        default: null
    },
    createdAt: {
        type: Date,
        default: Date.now
    },
    updatedAt: {
        type: Date,
        default: Date.now
    }
});

// Customer Schema (replaces Stripe Customer)
const CustomerSchema = new mongoose.Schema({
    id: {
        type: String,
        required: true,
        unique: true
    },
    email: {
        type: String,
        required: true
    },
    name: {
        type: String,
        default: null
    },
    nanoAddress: {
        type: String,
        default: null
    },
    metadata: {
        type: Map,
        of: String
    },
    stripeId: {
        type: String,
        default: null
    },
    createdAt: {
        type: Date,
        default: Date.now
    },
    updatedAt: {
        type: Date,
        default: Date.now
    }
});

// Payment Schema (replaces Stripe Payment)
const PaymentSchema = new mongoose.Schema({
    id: {
        type: String,
        required: true,
        unique: true
    },
    paymentIntentId: {
        type: String,
        required: true
    },
    amount: {
        type: Number,
        required: true
    },
    currency: {
        type: String,
        default: 'NANO'
    },
    status: {
        type: String,
        enum: ['requires_payment_method', 'requires_confirmation', 'requires_action', 'processing', 'succeeded', 'canceled'],
        required: true
    },
    blockHash: {
        type: String,
        default: null
    },
    verifiedAt: {
        type: Date,
        default: null
    },
    metadata: {
        type: Map,
        of: String
    },
    stripeId: {
        type: String,
        default: null
    },
    createdAt: {
        type: Date,
        default: Date.now
    },
    updatedAt: {
        type: Date,
        default: Date.now
    }
});

// Create models
const PaymentIntent = mongoose.model('PaymentIntent', PaymentIntentSchema);
const CheckoutSession = mongoose.model('CheckoutSession', CheckoutSessionSchema);
const Customer = mongoose.model('Customer', CustomerSchema);
const Payment = mongoose.model('Payment', PaymentSchema);

Step 5: Migration Dashboard

Jennifer created a migration dashboard to monitor the process:

<!-- Migration Dashboard -->
<div class="migration-dashboard">
    <div class="dashboard-header">
        <h1>Stripe to Nano Migration Dashboard</h1>
        <div class="migration-status">
            <span class="status-indicator active"></span>
            <span class="status-text">Migration Active</span>
        </div>
    </div>
    
    <div class="dashboard-stats">
        <div class="stat-card">
            <div class="stat-title">Total Migrations</div>
            <div class="stat-value" id="total-migrations">0</div>
        </div>
        <div class="stat-card">
            <div class="stat-title">Successful</div>
            <div class="stat-value success" id="successful-migrations">0</div>
        </div>
        <div class="stat-card">
            <div class="stat-title">Failed</div>
            <div class="stat-value error" id="failed-migrations">0</div>
        </div>
        <div class="stat-card">
            <div class="stat-title">Success Rate</div>
            <div class="stat-value" id="success-rate">0%</div>
        </div>
    </div>
    
    <div class="migration-controls">
        <button class="btn btn-primary" onclick="startMigration()">Start Migration</button>
        <button class="btn btn-secondary" onclick="pauseMigration()">Pause Migration</button>
        <button class="btn btn-danger" onclick="stopMigration()">Stop Migration</button>
    </div>
    
    <div class="migration-log">
        <h3>Migration Log</h3>
        <div id="migration-log-content" class="log-content">
            <!-- Migration log entries will be displayed here -->
        </div>
    </div>
    
    <div class="migration-progress">
        <h3>Migration Progress</h3>
        <div class="progress-bar">
            <div class="progress-fill" id="progress-fill" style="width: 0%"></div>
        </div>
        <div class="progress-text" id="progress-text">0% Complete</div>
    </div>
</div>

<script>
// Migration Dashboard JavaScript
class MigrationDashboard {
    constructor() {
        this.migrationStatus = 'stopped';
        this.migrationProgress = 0;
        this.migrationLog = [];
    }
    
    // Start migration
    async startMigration() {
        try {
            this.migrationStatus = 'running';
            this.updateMigrationStatus();
            
            // Start migration process
            await this.runMigration();
            
        } catch (error) {
            console.error('Migration start error:', error);
            this.addLogEntry('error', 'Failed to start migration: ' + error.message);
        }
    }
    
    // Run migration process
    async runMigration() {
        try {
            // Get Stripe data to migrate
            const stripeData = await this.getStripeData();
            
            // Migrate each type of data
            await this.migratePaymentIntents(stripeData.paymentIntents);
            await this.migrateCheckoutSessions(stripeData.checkoutSessions);
            await this.migrateCustomers(stripeData.customers);
            
            this.migrationStatus = 'completed';
            this.updateMigrationStatus();
            
        } catch (error) {
            console.error('Migration process error:', error);
            this.migrationStatus = 'failed';
            this.updateMigrationStatus();
        }
    }
    
    // Migrate payment intents
    async migratePaymentIntents(paymentIntents) {
        for (const paymentIntent of paymentIntents) {
            try {
                const response = await fetch('/api/migration/payment-intent', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ stripePaymentIntent: paymentIntent })
                });
                
                const data = await response.json();
                
                if (data.success) {
                    this.addLogEntry('success', `Migrated payment intent: ${paymentIntent.id}`);
                } else {
                    this.addLogEntry('error', `Failed to migrate payment intent: ${paymentIntent.id}`);
                }
                
                // Update progress
                this.updateProgress();
                
            } catch (error) {
                this.addLogEntry('error', `Error migrating payment intent ${paymentIntent.id}: ${error.message}`);
            }
        }
    }
    
    // Migrate checkout sessions
    async migrateCheckoutSessions(checkoutSessions) {
        for (const checkoutSession of checkoutSessions) {
            try {
                const response = await fetch('/api/migration/checkout-session', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ stripeCheckoutSession: checkoutSession })
                });
                
                const data = await response.json();
                
                if (data.success) {
                    this.addLogEntry('success', `Migrated checkout session: ${checkoutSession.id}`);
                } else {
                    this.addLogEntry('error', `Failed to migrate checkout session: ${checkoutSession.id}`);
                }
                
                // Update progress
                this.updateProgress();
                
            } catch (error) {
                this.addLogEntry('error', `Error migrating checkout session ${checkoutSession.id}: ${error.message}`);
            }
        }
    }
    
    // Migrate customers
    async migrateCustomers(customers) {
        for (const customer of customers) {
            try {
                const response = await fetch('/api/migration/customer', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ stripeCustomer: customer })
                });
                
                const data = await response.json();
                
                if (data.success) {
                    this.addLogEntry('success', `Migrated customer: ${customer.id}`);
                } else {
                    this.addLogEntry('error', `Failed to migrate customer: ${customer.id}`);
                }
                
                // Update progress
                this.updateProgress();
                
            } catch (error) {
                this.addLogEntry('error', `Error migrating customer ${customer.id}: ${error.message}`);
            }
        }
    }
    
    // Get Stripe data to migrate
    async getStripeData() {
        // This would typically fetch from Stripe API
        // For now, we'll return mock data
        return {
            paymentIntents: [],
            checkoutSessions: [],
            customers: []
        };
    }
    
    // Add log entry
    addLogEntry(type, message) {
        const logEntry = {
            type: type,
            message: message,
            timestamp: new Date().toLocaleString()
        };
        
        this.migrationLog.push(logEntry);
        this.updateLogDisplay();
    }
    
    // Update log display
    updateLogDisplay() {
        const logContent = document.getElementById('migration-log-content');
        
        const logHTML = this.migrationLog.slice(-20).map(entry => `
            <div class="log-entry ${entry.type}">
                <span class="log-time">${entry.timestamp}</span>
                <span class="log-message">${entry.message}</span>
            </div>
        `).join('');
        
        logContent.innerHTML = logHTML;
    }
    
    // Update progress
    updateProgress() {
        // This would calculate actual progress based on migration status
        this.migrationProgress += 1;
        
        const progressFill = document.getElementById('progress-fill');
        const progressText = document.getElementById('progress-text');
        
        progressFill.style.width = `${this.migrationProgress}%`;
        progressText.textContent = `${this.migrationProgress}% Complete`;
    }
    
    // Update migration status
    updateMigrationStatus() {
        const statusIndicator = document.querySelector('.status-indicator');
        const statusText = document.querySelector('.status-text');
        
        statusIndicator.className = `status-indicator ${this.migrationStatus}`;
        statusText.textContent = this.migrationStatus.charAt(0).toUpperCase() + this.migrationStatus.slice(1);
    }
    
    // Pause migration
    pauseMigration() {
        this.migrationStatus = 'paused';
        this.updateMigrationStatus();
        this.addLogEntry('info', 'Migration paused');
    }
    
    // Stop migration
    stopMigration() {
        this.migrationStatus = 'stopped';
        this.updateMigrationStatus();
        this.addLogEntry('info', 'Migration stopped');
    }
}

// Initialize migration dashboard
const migrationDashboard = new MigrationDashboard();

// Global functions for buttons
function startMigration() {
    migrationDashboard.startMigration();
}

function pauseMigration() {
    migrationDashboard.pauseMigration();
}

function stopMigration() {
    migrationDashboard.stopMigration();
}
</script>

Real Results: Jennifer's Migration Success

After migrating from Stripe to Nano, Jennifer achieved remarkable results:

Cost Savings

• 100% reduction in payment fees: From 2.9% + $0.30 to 0%
• $15,000 monthly savings: On payment processing fees alone
• No chargeback costs: Eliminated chargeback fees and disputes
• No PCI compliance costs: Reduced infrastructure costs

Performance Improvements

• Instant settlements: Payments confirm in seconds vs. 2-7 days
• 99.9% payment success rate: Higher than Stripe's 98.5%
• Global accessibility: Customers from 50+ countries can now pay
• No payment processor downtime: Eliminated Stripe outages

User Experience

• Simplified checkout: One-click payments with Nano wallets
• Mobile optimization: Perfect experience on all devices
• No registration required: Customers don't need accounts
• Transparent fees: No hidden processing fees

Advanced Migration Features

Automated Migration Scripts

// Automated migration scripts
class AutomatedMigration {
    constructor() {
        this.migrationQueue = [];
        this.isRunning = false;
    }
    
    // Add migration task to queue
    addMigrationTask(task) {
        this.migrationQueue.push(task);
        
        if (!this.isRunning) {
            this.processMigrationQueue();
        }
    }
    
    // Process migration queue
    async processMigrationQueue() {
        this.isRunning = true;
        
        while (this.migrationQueue.length > 0) {
            const task = this.migrationQueue.shift();
            
            try {
                await this.executeMigrationTask(task);
            } catch (error) {
                console.error('Migration task error:', error);
                // Retry logic could be implemented here
            }
        }
        
        this.isRunning = false;
    }
    
    // Execute migration task
    async executeMigrationTask(task) {
        switch (task.type) {
            case 'payment_intent':
                await migrationService.migratePaymentIntent(task.data);
                break;
            case 'checkout_session':
                await migrationService.migrateCheckoutSession(task.data);
                break;
            case 'customer':
                await migrationService.migrateCustomer(task.data);
                break;
            default:
                console.log('Unknown migration task type:', task.type);
        }
    }
}

Migration Validation

// Migration validation
class MigrationValidation {
    constructor() {
        this.validationRules = {
            paymentIntent: this.validatePaymentIntent,
            checkoutSession: this.validateCheckoutSession,
            customer: this.validateCustomer
        };
    }
    
    // Validate migration
    async validateMigration(migration) {
        const validator = this.validationRules[migration.type];
        
        if (validator) {
            return await validator(migration);
        } else {
            return { valid: false, error: 'Unknown migration type' };
        }
    }
    
    // Validate payment intent migration
    async validatePaymentIntent(migration) {
        const { stripePaymentIntent, nanoPayment } = migration;
        
        // Check if amounts match
        const amountMatches = this.compareAmounts(stripePaymentIntent.amount, nanoPayment.amount);
        
        // Check if metadata is preserved
        const metadataMatches = this.compareMetadata(stripePaymentIntent.metadata, nanoPayment.metadata);
        
        return {
            valid: amountMatches && metadataMatches,
            details: {
                amountMatches,
                metadataMatches
            }
        };
    }
    
    // Compare amounts
    compareAmounts(stripeAmount, nanoAmount) {
        // Convert and compare amounts
        const convertedAmount = this.convertToNano(stripeAmount, 'USD');
        return Math.abs(convertedAmount - nanoAmount) < 0.000001;
    }
    
    // Compare metadata
    compareMetadata(stripeMetadata, nanoMetadata) {
        if (!stripeMetadata && !nanoMetadata) return true;
        if (!stripeMetadata || !nanoMetadata) return false;
        
        return JSON.stringify(stripeMetadata) === JSON.stringify(nanoMetadata);
    }
}

Key Takeaways

1. Complete Replacement: NanoPay.js can fully replace Stripe functionality
2. Cost Elimination: 100% reduction in payment processing fees
3. Performance Improvement: Instant settlements and higher success rates
4. Global Accessibility: No geographic restrictions
5. Simplified Architecture: No PCI compliance or complex webhooks needed

Common Migration Pitfalls to Avoid

• Incomplete migration: Ensure all Stripe functionality is replaced
• Data loss: Properly migrate all customer and payment data
• Testing gaps: Thoroughly test all payment flows
• User communication: Inform users about the payment method change
• Rollback plan: Have a plan to rollback if needed

Next Steps

Jennifer's platform now processes all payments through Nano. She's planning to:

• Add subscription payments with Nano
• Implement advanced payment analytics
• Create a mobile app with Nano payments

Resources

• NanoPay.js Documentation
• Nano RPC Checkout API
• Migration Best Practices

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Ready to replace Stripe with Nano? Start with simple payments and migrate your entire system. The future of payment processing is here!