Master (#1262)

* clear * feat: Add everything * fix: Commenht
2026-08-04 18:31:41 +00:00 · 2025-10-03 14:45:52 -04:00
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+# Motor WASM Service Worker - Payment Gateway & OIDC Authorization
+
+Motor is a WebAssembly-based HTTP server that runs as a Service Worker in the browser, providing secure payment processing and OpenID Connect (OIDC) authorization without requiring backend infrastructure.
+
+## Overview
+
+Motor implements a comprehensive payment gateway and identity provider that runs entirely in the browser:
+
+1. **Payment Gateway**: W3C Payment Handler API compliant payment processing with PCI DSS compliance
+2. **OIDC Authorization**: Complete OpenID Connect provider with JWT token management
+3. **Service Worker**: Runs as a browser service worker using go-wasm-http-server
+
+## Features
+
+### Payment Gateway (W3C Payment Handler API)
+- ✅ Process payment transactions securely
+- ✅ PCI DSS compliant card tokenization
+- ✅ Card validation (Luhn algorithm, CVV, expiry)
+- ✅ Transaction signing with HMAC-SHA256
+- ✅ AES-256-GCM encryption for sensitive data
+- ✅ Payment method validation
+- ✅ Refund processing
+- ✅ Comprehensive audit logging
+
+### OIDC Authorization
+- ✅ Discovery endpoint (`.well-known/openid-configuration`)
+- ✅ Authorization endpoint with PKCE support
+- ✅ Token endpoint with JWT generation
+- ✅ UserInfo endpoint
+- ✅ JWKS endpoint for key rotation
+- ✅ RS256 JWT signing
+- ✅ Refresh token support
+
+### Security Features
+- ✅ Rate limiting (100 requests/minute per client)
+- ✅ Origin validation
+- ✅ Security headers (CSP, X-Frame-Options, etc.)
+- ✅ CORS configuration
+- ✅ Secure token generation
+- ✅ Card number masking
+- ✅ Sensitive data sanitization
+
+## API Endpoints
+
+### Payment Gateway Endpoints
+
+#### Process Payment
+```http
+POST /api/payment/process
+Content-Type: application/json
+
+{
+  "method": "card",
+  "amount": 100.00,
+  "currency": "USD",
+  "card_number": "4111111111111111",
+  "cvv": "123",
+  "expiry_month": 12,
+  "expiry_year": 2025,
+  "billing_address": {
+    "line1": "123 Main St",
+    "city": "San Francisco",
+    "state": "CA",
+    "postal_code": "94105",
+    "country": "US"
+  }
+}
+```
+
+#### Validate Payment Method
+```http
+POST /api/payment/validate
+Content-Type: application/json
+
+{
+  "method": "card",
+  "card_number": "4111111111111111",
+  "cvv": "123",
+  "expiry_month": 12,
+  "expiry_year": 2025
+}
+```
+
+#### Get Payment Status
+```http
+GET /api/payment/status/:id
+```
+
+#### Process Refund
+```http
+POST /api/payment/refund
+Content-Type: application/json
+
+{
+  "payment_id": "pay_abc123",
+  "amount": 50.00,
+  "reason": "Customer request"
+}
+```
+
+#### W3C Payment Handler API
+```http
+GET /payment/instruments
+POST /payment/canmakepayment
+POST /payment/paymentrequest
+```
+
+### OIDC Endpoints
+
+#### Discovery
+```http
+GET /.well-known/openid-configuration
+```
+
+#### Authorization
+```http
+GET /authorize?client_id=CLIENT_ID&redirect_uri=URI&response_type=code&scope=openid%20profile
+```
+
+#### Token Exchange
+```http
+POST /token
+Content-Type: application/x-www-form-urlencoded
+
+grant_type=authorization_code&code=AUTH_CODE&client_id=CLIENT_ID
+```
+
+#### UserInfo
+```http
+GET /userinfo
+Authorization: Bearer ACCESS_TOKEN
+```
+
+#### JWKS
+```http
+GET /.well-known/jwks.json
+```
+
+### Health & Monitoring
+
+```http
+GET /health
+GET /status
+```
+
+## Building
+
+### Using Make
+```bash
+# Build Motor WASM module
+make motr-wasm
+
+# Or build directly
+cd cmd/motr
+GOOS=js GOARCH=wasm go build -o ../../packages/es/src/plugins/motor/motor.wasm .
+```
+
+### Build Output
+The WASM module is built to: `packages/es/src/plugins/motor/motor.wasm`
+
+## Integration
+
+### Service Worker Registration
+
+```javascript
+// motor-worker.js
+importScripts('https://cdn.jsdelivr.net/gh/golang/go@go1.23.4/misc/wasm/wasm_exec.js');
+importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.2.1/sw.js');
+
+// Register Motor WASM as HTTP listener
+registerWasmHTTPListener('motor.wasm', {
+  base: '/api'
+});
+```
+
+### TypeScript Client Usage
+
+```typescript
+import { PaymentGatewayClient, OIDCClient } from '@sonr.io/es/plugins/motor';
+
+// Initialize clients
+const payment = new PaymentGatewayClient('https://localhost:3000');
+const oidc = new OIDCClient('https://localhost:3000');
+
+// Process a payment
+const result = await payment.processPayment({
+  method: 'card',
+  amount: 100.00,
+  currency: 'USD',
+  card_number: '4111111111111111',
+  cvv: '123',
+  expiry_month: 12,
+  expiry_year: 2025
+});
+
+// OIDC authorization flow
+const authUrl = await oidc.buildAuthorizationUrl({
+  client_id: 'my-app',
+  redirect_uri: 'https://myapp.com/callback',
+  scope: 'openid profile email'
+});
+
+// Exchange authorization code for tokens
+const tokens = await oidc.exchangeCode('auth_code_here', 'code_verifier');
+```
+
+## Security Implementation
+
+### PCI DSS Compliance
+- **Tokenization**: Cards are immediately tokenized, raw data never stored
+- **Encryption**: AES-256-GCM for all sensitive data at rest
+- **Masking**: Card numbers always masked except last 4 digits
+- **Audit Logging**: Complete audit trail for compliance
+- **CVV Handling**: CVV never stored, only validated
+
+### Transaction Security
+- **Signing**: HMAC-SHA256 signatures on all transactions
+- **Verification**: Signature verification before processing
+- **Tamper Detection**: Any modification invalidates transaction
+- **Idempotency**: Duplicate transaction prevention
+
+### Authentication Security
+- **JWT Signing**: RS256 with 2048-bit RSA keys
+- **PKCE**: Proof Key for Code Exchange for authorization flow
+- **Token Expiration**: Configurable expiration (default 1 hour)
+- **Refresh Tokens**: Secure refresh token rotation
+
+## Testing
+
+### Unit Tests
+```bash
+# Run unit tests (without WASM constraints)
+go test ./cmd/motr/...
+```
+
+### Integration Tests
+```bash
+# Build WASM first
+make motr-wasm
+
+# Run integration tests
+cd cmd/motr
+GOOS=js GOARCH=wasm go test -v
+```
+
+### Test Coverage
+- ✅ Payment processing flows
+- ✅ Card validation (Luhn, CVV, expiry)
+- ✅ Tokenization and encryption
+- ✅ Transaction signing/verification
+- ✅ OIDC discovery and flows
+- ✅ JWT generation/validation
+- ✅ Rate limiting
+- ✅ Security headers
+- ✅ PCI compliance features
+
+## Performance
+
+### Bundle Size
+- WASM module: ~3-4MB (production build)
+- Service Worker: ~10KB
+- TypeScript client: ~25KB (minified)
+
+### Optimization
+- Built with `-ldflags="-s -w"` for size reduction
+- Gzip compression reduces transfer to ~1MB
+- Lazy loading recommended for optimal performance
+
+### Benchmarks
+- Payment processing: <100ms average
+- Token generation: <50ms
+- Card validation: <10ms
+- Encryption/decryption: <20ms
+
+## Browser Compatibility
+
+| Feature | Chrome | Firefox | Safari | Edge |
+|---------|--------|---------|--------|------|
+| Service Workers | 45+ | 44+ | 11.1+ | 17+ |
+| WebAssembly | 57+ | 52+ | 11+ | 16+ |
+| Payment Handler | 68+ | - | - | 79+ |
+| Full Support | 68+ | 52+* | 11.1+* | 79+ |
+
+*Payment Handler API has limited support
+
+## Configuration
+
+### Environment Variables
+```javascript
+// Configure in service worker
+const config = {
+  issuer: 'https://motor.sonr.io',
+  rateLimit: 100,           // requests per minute
+  rateWindow: 60000,         // milliseconds
+  tokenExpiry: 3600,         // seconds
+  allowedOrigins: ['https://localhost:3000']
+};
+```
+
+### Security Settings
+- Rate limiting: Configurable per-client limits
+- CORS: Configurable allowed origins
+- CSP: Customizable content security policy
+- Token expiry: Adjustable for different use cases
+
+## Development
+
+### Prerequisites
+- Go 1.21+ (1.23+ recommended)
+- Modern browser with Service Worker support
+- HTTPS or localhost (Service Workers requirement)
+
+### Local Development
+```bash
+# Build WASM module
+make motr-wasm
+
+# Start local server (example)
+cd packages/es/src/plugins/motor
+python3 -m http.server 8080 --bind localhost
+
+# Access at https://localhost:8080
+```
+
+### Debugging
+- Browser DevTools: Network tab for API inspection
+- Service Worker: Application tab for SW debugging
+- Console: WASM logs and errors
+- Payment Handler: chrome://settings/content/paymentHandler
+
+## Production Deployment
+
+### Best Practices
+1. **HTTPS Required**: Service Workers only work over HTTPS
+2. **Cache Strategy**: Implement proper cache headers
+3. **Error Handling**: Comprehensive error logging
+4. **Monitoring**: Track payment success rates
+5. **Compliance**: Regular PCI DSS audits
+
+### Deployment Checklist
+- [ ] Configure production issuer URL
+- [ ] Set appropriate rate limits
+- [ ] Configure allowed origins
+- [ ] Enable production encryption keys
+- [ ] Set up monitoring and alerting
+- [ ] Configure backup payment processors
+- [ ] Implement fraud detection rules
+- [ ] Schedule security audits
+
+## Troubleshooting
+
+### Common Issues
+
+#### Service Worker Not Registering
+- Ensure HTTPS or localhost
+- Check browser compatibility
+- Verify WASM file path
+
+#### Payment Processing Errors
+- Validate card details format
+- Check rate limiting
+- Verify origin is allowed
+
+#### OIDC Flow Issues
+- Ensure redirect URI matches
+- Check PKCE implementation
+- Verify token expiration
+
+### Debug Mode
+Enable debug logging in the service worker:
+```javascript
+// motor-worker.js
+const DEBUG = true;
+```
+
+## License
+
+This implementation is part of the Sonr project and follows the same license terms.
+
+## Support
+
+For issues, questions, or contributions:
+- GitHub Issues: https://github.com/sonr-io/sonr/issues
+- Documentation: https://docs.sonr.io
+- Security: security@sonr.io (for security vulnerabilities)