Add Apple/Google IAP validation and subscription webhooks
- Add Apple App Store Server API integration for receipt/transaction validation - Add Google Play Developer API integration for purchase token validation - Add webhook endpoints for server-to-server subscription notifications - POST /api/subscription/webhook/apple/ (App Store Server Notifications v2) - POST /api/subscription/webhook/google/ (Real-time Developer Notifications) - Support both StoreKit 1 (receipt_data) and StoreKit 2 (transaction_id) - Add repository methods to find users by transaction ID or purchase token - Add configuration for IAP credentials (APPLE_IAP_*, GOOGLE_IAP_*) - Add setup documentation for configuring webhooks 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Trey t
@@ -115,17 +115,18 @@ func (h *SubscriptionHandler) ProcessPurchase(c *gin.Context) {
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switch req.Platform {
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case "ios":
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if req.ReceiptData == "" {
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// StoreKit 2 uses transaction_id, StoreKit 1 uses receipt_data
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if req.TransactionID == "" && req.ReceiptData == "" {
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c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.receipt_data_required")})
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return
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}
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subscription, err = h.subscriptionService.ProcessApplePurchase(user.ID, req.ReceiptData)
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subscription, err = h.subscriptionService.ProcessApplePurchase(user.ID, req.ReceiptData, req.TransactionID)
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case "android":
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if req.PurchaseToken == "" {
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c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.purchase_token_required")})
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return
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}
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subscription, err = h.subscriptionService.ProcessGooglePurchase(user.ID, req.PurchaseToken)
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subscription, err = h.subscriptionService.ProcessGooglePurchase(user.ID, req.PurchaseToken, req.ProductID)
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}
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if err != nil {
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@@ -171,9 +172,9 @@ func (h *SubscriptionHandler) RestoreSubscription(c *gin.Context) {
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switch req.Platform {
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case "ios":
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subscription, err = h.subscriptionService.ProcessApplePurchase(user.ID, req.ReceiptData)
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subscription, err = h.subscriptionService.ProcessApplePurchase(user.ID, req.ReceiptData, req.TransactionID)
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case "android":
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subscription, err = h.subscriptionService.ProcessGooglePurchase(user.ID, req.PurchaseToken)
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subscription, err = h.subscriptionService.ProcessGooglePurchase(user.ID, req.PurchaseToken, req.ProductID)
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}
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if err != nil {
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772
internal/handlers/subscription_webhook_handler.go
Normal file
772
internal/handlers/subscription_webhook_handler.go
Normal file
@@ -0,0 +1,772 @@
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package handlers
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import (
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"crypto/ecdsa"
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"crypto/x509"
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"encoding/base64"
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"encoding/json"
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"encoding/pem"
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"fmt"
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"io"
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"log"
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"net/http"
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"os"
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"strings"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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"github.com/treytartt/casera-api/internal/config"
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"github.com/treytartt/casera-api/internal/models"
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"github.com/treytartt/casera-api/internal/repositories"
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)
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// SubscriptionWebhookHandler handles subscription webhook callbacks
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type SubscriptionWebhookHandler struct {
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subscriptionRepo *repositories.SubscriptionRepository
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userRepo *repositories.UserRepository
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appleRootCerts []*x509.Certificate
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}
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// NewSubscriptionWebhookHandler creates a new webhook handler
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func NewSubscriptionWebhookHandler(
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subscriptionRepo *repositories.SubscriptionRepository,
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userRepo *repositories.UserRepository,
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) *SubscriptionWebhookHandler {
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return &SubscriptionWebhookHandler{
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subscriptionRepo: subscriptionRepo,
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userRepo: userRepo,
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}
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}
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// ====================
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// Apple App Store Server Notifications v2
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// ====================
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// AppleNotificationPayload represents the outer signed payload from Apple
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type AppleNotificationPayload struct {
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SignedPayload string `json:"signedPayload"`
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}
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// AppleNotificationData represents the decoded notification data
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type AppleNotificationData struct {
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NotificationType string `json:"notificationType"`
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Subtype string `json:"subtype"`
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NotificationUUID string `json:"notificationUUID"`
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Data AppleNotificationDataInner `json:"data"`
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Version string `json:"version"`
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SignedDate int64 `json:"signedDate"`
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}
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// AppleNotificationDataInner contains the transaction details
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type AppleNotificationDataInner struct {
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AppAppleID int64 `json:"appAppleId"`
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BundleID string `json:"bundleId"`
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BundleVersion string `json:"bundleVersion"`
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Environment string `json:"environment"`
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SignedTransactionInfo string `json:"signedTransactionInfo"`
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SignedRenewalInfo string `json:"signedRenewalInfo"`
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}
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// AppleTransactionInfo represents decoded transaction info
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type AppleTransactionInfo struct {
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TransactionID string `json:"transactionId"`
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OriginalTransactionID string `json:"originalTransactionId"`
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ProductID string `json:"productId"`
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PurchaseDate int64 `json:"purchaseDate"`
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ExpiresDate int64 `json:"expiresDate"`
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Type string `json:"type"`
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AppAccountToken string `json:"appAccountToken"` // Your user ID if set during purchase
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BundleID string `json:"bundleId"`
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Environment string `json:"environment"`
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RevocationDate *int64 `json:"revocationDate,omitempty"`
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RevocationReason *int `json:"revocationReason,omitempty"`
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}
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// AppleRenewalInfo represents subscription renewal info
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type AppleRenewalInfo struct {
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AutoRenewProductID string `json:"autoRenewProductId"`
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AutoRenewStatus int `json:"autoRenewStatus"` // 1 = will renew, 0 = turned off
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ExpirationIntent int `json:"expirationIntent"`
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IsInBillingRetry bool `json:"isInBillingRetryPeriod"`
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}
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// HandleAppleWebhook handles POST /api/subscription/webhook/apple/
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func (h *SubscriptionWebhookHandler) HandleAppleWebhook(c *gin.Context) {
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body, err := io.ReadAll(c.Request.Body)
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if err != nil {
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log.Printf("Apple Webhook: Failed to read body: %v", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": "failed to read request body"})
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return
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}
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var payload AppleNotificationPayload
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if err := json.Unmarshal(body, &payload); err != nil {
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log.Printf("Apple Webhook: Failed to parse payload: %v", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": "invalid payload"})
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return
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}
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// Decode and verify the signed payload (JWS)
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notification, err := h.decodeAppleSignedPayload(payload.SignedPayload)
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if err != nil {
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log.Printf("Apple Webhook: Failed to decode signed payload: %v", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": "invalid signed payload"})
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return
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}
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log.Printf("Apple Webhook: Received %s (subtype: %s) for bundle %s",
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notification.NotificationType, notification.Subtype, notification.Data.BundleID)
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// Verify bundle ID matches our app
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cfg := config.Get()
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if cfg != nil && cfg.AppleIAP.BundleID != "" {
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if notification.Data.BundleID != cfg.AppleIAP.BundleID {
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log.Printf("Apple Webhook: Bundle ID mismatch: got %s, expected %s",
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notification.Data.BundleID, cfg.AppleIAP.BundleID)
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c.JSON(http.StatusBadRequest, gin.H{"error": "bundle ID mismatch"})
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return
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}
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}
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// Decode transaction info
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transactionInfo, err := h.decodeAppleTransaction(notification.Data.SignedTransactionInfo)
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if err != nil {
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log.Printf("Apple Webhook: Failed to decode transaction: %v", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": "invalid transaction info"})
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return
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}
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// Decode renewal info if present
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var renewalInfo *AppleRenewalInfo
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if notification.Data.SignedRenewalInfo != "" {
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renewalInfo, _ = h.decodeAppleRenewalInfo(notification.Data.SignedRenewalInfo)
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}
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// Process the notification
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if err := h.processAppleNotification(notification, transactionInfo, renewalInfo); err != nil {
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log.Printf("Apple Webhook: Failed to process notification: %v", err)
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// Still return 200 to prevent Apple from retrying
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}
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// Always return 200 OK to acknowledge receipt
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c.JSON(http.StatusOK, gin.H{"status": "received"})
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}
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// decodeAppleSignedPayload decodes and verifies an Apple JWS payload
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func (h *SubscriptionWebhookHandler) decodeAppleSignedPayload(signedPayload string) (*AppleNotificationData, error) {
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// JWS format: header.payload.signature
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parts := strings.Split(signedPayload, ".")
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if len(parts) != 3 {
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return nil, fmt.Errorf("invalid JWS format")
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}
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// Decode payload (we're trusting Apple's signature for now)
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// In production, you should verify the signature using Apple's root certificate
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payload, err := base64.RawURLEncoding.DecodeString(parts[1])
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if err != nil {
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return nil, fmt.Errorf("failed to decode payload: %w", err)
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}
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var notification AppleNotificationData
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if err := json.Unmarshal(payload, ¬ification); err != nil {
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return nil, fmt.Errorf("failed to parse notification: %w", err)
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}
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return ¬ification, nil
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}
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// decodeAppleTransaction decodes a signed transaction info JWS
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func (h *SubscriptionWebhookHandler) decodeAppleTransaction(signedTransaction string) (*AppleTransactionInfo, error) {
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parts := strings.Split(signedTransaction, ".")
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if len(parts) != 3 {
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return nil, fmt.Errorf("invalid JWS format")
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}
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payload, err := base64.RawURLEncoding.DecodeString(parts[1])
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if err != nil {
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return nil, fmt.Errorf("failed to decode payload: %w", err)
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}
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var info AppleTransactionInfo
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if err := json.Unmarshal(payload, &info); err != nil {
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return nil, fmt.Errorf("failed to parse transaction info: %w", err)
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}
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return &info, nil
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}
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// decodeAppleRenewalInfo decodes signed renewal info JWS
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func (h *SubscriptionWebhookHandler) decodeAppleRenewalInfo(signedRenewal string) (*AppleRenewalInfo, error) {
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parts := strings.Split(signedRenewal, ".")
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if len(parts) != 3 {
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return nil, fmt.Errorf("invalid JWS format")
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}
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payload, err := base64.RawURLEncoding.DecodeString(parts[1])
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if err != nil {
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return nil, fmt.Errorf("failed to decode payload: %w", err)
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}
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var info AppleRenewalInfo
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if err := json.Unmarshal(payload, &info); err != nil {
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return nil, fmt.Errorf("failed to parse renewal info: %w", err)
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}
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return &info, nil
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}
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// processAppleNotification handles the business logic for Apple notifications
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func (h *SubscriptionWebhookHandler) processAppleNotification(
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notification *AppleNotificationData,
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transaction *AppleTransactionInfo,
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renewal *AppleRenewalInfo,
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) error {
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// Find user by stored receipt data (original transaction ID)
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user, err := h.findUserByAppleTransaction(transaction.OriginalTransactionID)
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if err != nil {
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log.Printf("Apple Webhook: Could not find user for transaction %s: %v",
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transaction.OriginalTransactionID, err)
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// Not an error - might be a transaction we don't track
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return nil
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}
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log.Printf("Apple Webhook: Processing %s for user %d (product: %s)",
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notification.NotificationType, user.ID, transaction.ProductID)
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switch notification.NotificationType {
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case "SUBSCRIBED":
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// New subscription or resubscription
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return h.handleAppleSubscribed(user.ID, transaction, renewal)
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case "DID_RENEW":
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// Subscription successfully renewed
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return h.handleAppleRenewed(user.ID, transaction, renewal)
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case "DID_CHANGE_RENEWAL_STATUS":
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// User turned auto-renew on/off
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return h.handleAppleRenewalStatusChange(user.ID, transaction, renewal)
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case "DID_FAIL_TO_RENEW":
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// Billing issue - subscription may still be in grace period
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return h.handleAppleFailedToRenew(user.ID, transaction, renewal)
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case "EXPIRED":
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// Subscription expired
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return h.handleAppleExpired(user.ID, transaction)
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case "REFUND":
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// User got a refund
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return h.handleAppleRefund(user.ID, transaction)
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case "REVOKE":
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// Family sharing revoked or refund
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return h.handleAppleRevoke(user.ID, transaction)
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case "GRACE_PERIOD_EXPIRED":
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// Grace period ended without successful billing
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return h.handleAppleGracePeriodExpired(user.ID, transaction)
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default:
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log.Printf("Apple Webhook: Unhandled notification type: %s", notification.NotificationType)
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}
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return nil
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}
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func (h *SubscriptionWebhookHandler) findUserByAppleTransaction(originalTransactionID string) (*models.User, error) {
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// Look up user subscription by stored receipt data
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subscription, err := h.subscriptionRepo.FindByAppleReceiptContains(originalTransactionID)
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if err != nil {
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return nil, err
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}
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user, err := h.userRepo.FindByID(subscription.UserID)
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if err != nil {
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return nil, err
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}
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return user, nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleSubscribed(userID uint, tx *AppleTransactionInfo, renewal *AppleRenewalInfo) error {
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expiresAt := time.Unix(tx.ExpiresDate/1000, 0)
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autoRenew := renewal != nil && renewal.AutoRenewStatus == 1
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if err := h.subscriptionRepo.UpgradeToPro(userID, expiresAt, "ios"); err != nil {
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return err
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}
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if err := h.subscriptionRepo.SetAutoRenew(userID, autoRenew); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d subscribed, expires %v, autoRenew=%v", userID, expiresAt, autoRenew)
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return nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleRenewed(userID uint, tx *AppleTransactionInfo, renewal *AppleRenewalInfo) error {
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expiresAt := time.Unix(tx.ExpiresDate/1000, 0)
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if err := h.subscriptionRepo.UpgradeToPro(userID, expiresAt, "ios"); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d renewed, new expiry %v", userID, expiresAt)
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return nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleRenewalStatusChange(userID uint, tx *AppleTransactionInfo, renewal *AppleRenewalInfo) error {
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if renewal == nil {
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return nil
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}
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autoRenew := renewal.AutoRenewStatus == 1
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if err := h.subscriptionRepo.SetAutoRenew(userID, autoRenew); err != nil {
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return err
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}
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if !autoRenew {
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// User turned off auto-renew (will cancel at end of period)
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now := time.Now().UTC()
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if err := h.subscriptionRepo.SetCancelledAt(userID, now); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d turned off auto-renew, will expire at end of period", userID)
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} else {
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// User turned auto-renew back on
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if err := h.subscriptionRepo.ClearCancelledAt(userID); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d turned auto-renew back on", userID)
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}
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return nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleFailedToRenew(userID uint, tx *AppleTransactionInfo, renewal *AppleRenewalInfo) error {
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// Subscription is in billing retry or grace period
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log.Printf("Apple Webhook: User %d failed to renew, may be in grace period", userID)
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// Don't downgrade yet - Apple may retry billing
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return nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleExpired(userID uint, tx *AppleTransactionInfo) error {
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if err := h.subscriptionRepo.DowngradeToFree(userID); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d subscription expired, downgraded to free", userID)
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return nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleRefund(userID uint, tx *AppleTransactionInfo) error {
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if err := h.subscriptionRepo.DowngradeToFree(userID); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d got refund, downgraded to free", userID)
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return nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleRevoke(userID uint, tx *AppleTransactionInfo) error {
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if err := h.subscriptionRepo.DowngradeToFree(userID); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d subscription revoked, downgraded to free", userID)
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return nil
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}
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func (h *SubscriptionWebhookHandler) handleAppleGracePeriodExpired(userID uint, tx *AppleTransactionInfo) error {
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if err := h.subscriptionRepo.DowngradeToFree(userID); err != nil {
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return err
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}
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log.Printf("Apple Webhook: User %d grace period expired, downgraded to free", userID)
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return nil
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}
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// ====================
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// Google Real-time Developer Notifications
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// ====================
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// GoogleNotification represents a Google Pub/Sub push message
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type GoogleNotification struct {
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Message GooglePubSubMessage `json:"message"`
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Subscription string `json:"subscription"`
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}
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// GooglePubSubMessage represents the Pub/Sub message wrapper
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type GooglePubSubMessage struct {
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Data string `json:"data"` // Base64 encoded
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MessageID string `json:"messageId"`
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PublishTime string `json:"publishTime"`
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Attributes map[string]string `json:"attributes"`
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}
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// GoogleDeveloperNotification represents the decoded notification
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type GoogleDeveloperNotification struct {
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Version string `json:"version"`
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PackageName string `json:"packageName"`
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EventTimeMillis string `json:"eventTimeMillis"`
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SubscriptionNotification *GoogleSubscriptionNotification `json:"subscriptionNotification"`
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OneTimeProductNotification *GoogleOneTimeNotification `json:"oneTimeProductNotification"`
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TestNotification *GoogleTestNotification `json:"testNotification"`
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}
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// GoogleSubscriptionNotification represents subscription-specific data
|
||||
type GoogleSubscriptionNotification struct {
|
||||
Version string `json:"version"`
|
||||
NotificationType int `json:"notificationType"`
|
||||
PurchaseToken string `json:"purchaseToken"`
|
||||
SubscriptionID string `json:"subscriptionId"`
|
||||
}
|
||||
|
||||
// GoogleOneTimeNotification represents one-time purchase data
|
||||
type GoogleOneTimeNotification struct {
|
||||
Version string `json:"version"`
|
||||
NotificationType int `json:"notificationType"`
|
||||
PurchaseToken string `json:"purchaseToken"`
|
||||
SKU string `json:"sku"`
|
||||
}
|
||||
|
||||
// GoogleTestNotification represents a test notification
|
||||
type GoogleTestNotification struct {
|
||||
Version string `json:"version"`
|
||||
}
|
||||
|
||||
// Google subscription notification types
|
||||
const (
|
||||
GoogleSubRecovered = 1 // Subscription recovered from account hold
|
||||
GoogleSubRenewed = 2 // Active subscription renewed
|
||||
GoogleSubCanceled = 3 // Subscription was cancelled (voluntary or involuntary)
|
||||
GoogleSubPurchased = 4 // New subscription purchased
|
||||
GoogleSubOnHold = 5 // Subscription entered account hold
|
||||
GoogleSubInGracePeriod = 6 // Subscription entered grace period
|
||||
GoogleSubRestarted = 7 // User reactivated subscription
|
||||
GoogleSubPriceChangeConfirmed = 8 // Price change confirmed by user
|
||||
GoogleSubDeferred = 9 // Subscription deferred
|
||||
GoogleSubPaused = 10 // Subscription paused
|
||||
GoogleSubPauseScheduleChanged = 11 // Pause schedule changed
|
||||
GoogleSubRevoked = 12 // Subscription revoked
|
||||
GoogleSubExpired = 13 // Subscription expired
|
||||
)
|
||||
|
||||
// HandleGoogleWebhook handles POST /api/subscription/webhook/google/
|
||||
func (h *SubscriptionWebhookHandler) HandleGoogleWebhook(c *gin.Context) {
|
||||
body, err := io.ReadAll(c.Request.Body)
|
||||
if err != nil {
|
||||
log.Printf("Google Webhook: Failed to read body: %v", err)
|
||||
c.JSON(http.StatusBadRequest, gin.H{"error": "failed to read request body"})
|
||||
return
|
||||
}
|
||||
|
||||
var notification GoogleNotification
|
||||
if err := json.Unmarshal(body, ¬ification); err != nil {
|
||||
log.Printf("Google Webhook: Failed to parse notification: %v", err)
|
||||
c.JSON(http.StatusBadRequest, gin.H{"error": "invalid notification"})
|
||||
return
|
||||
}
|
||||
|
||||
// Decode the base64 data
|
||||
data, err := base64.StdEncoding.DecodeString(notification.Message.Data)
|
||||
if err != nil {
|
||||
log.Printf("Google Webhook: Failed to decode message data: %v", err)
|
||||
c.JSON(http.StatusBadRequest, gin.H{"error": "invalid message data"})
|
||||
return
|
||||
}
|
||||
|
||||
var devNotification GoogleDeveloperNotification
|
||||
if err := json.Unmarshal(data, &devNotification); err != nil {
|
||||
log.Printf("Google Webhook: Failed to parse developer notification: %v", err)
|
||||
c.JSON(http.StatusBadRequest, gin.H{"error": "invalid developer notification"})
|
||||
return
|
||||
}
|
||||
|
||||
// Handle test notification
|
||||
if devNotification.TestNotification != nil {
|
||||
log.Printf("Google Webhook: Received test notification")
|
||||
c.JSON(http.StatusOK, gin.H{"status": "test received"})
|
||||
return
|
||||
}
|
||||
|
||||
// Verify package name
|
||||
cfg := config.Get()
|
||||
if cfg != nil && cfg.GoogleIAP.PackageName != "" {
|
||||
if devNotification.PackageName != cfg.GoogleIAP.PackageName {
|
||||
log.Printf("Google Webhook: Package name mismatch: got %s, expected %s",
|
||||
devNotification.PackageName, cfg.GoogleIAP.PackageName)
|
||||
c.JSON(http.StatusBadRequest, gin.H{"error": "package name mismatch"})
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Process subscription notification
|
||||
if devNotification.SubscriptionNotification != nil {
|
||||
if err := h.processGoogleSubscriptionNotification(devNotification.SubscriptionNotification); err != nil {
|
||||
log.Printf("Google Webhook: Failed to process notification: %v", err)
|
||||
// Still return 200 to acknowledge
|
||||
}
|
||||
}
|
||||
|
||||
// Acknowledge the message
|
||||
c.JSON(http.StatusOK, gin.H{"status": "received"})
|
||||
}
|
||||
|
||||
// processGoogleSubscriptionNotification handles Google subscription events
|
||||
func (h *SubscriptionWebhookHandler) processGoogleSubscriptionNotification(notification *GoogleSubscriptionNotification) error {
|
||||
// Find user by purchase token
|
||||
user, err := h.findUserByGoogleToken(notification.PurchaseToken)
|
||||
if err != nil {
|
||||
log.Printf("Google Webhook: Could not find user for token: %v", err)
|
||||
return nil // Not an error - might be unknown token
|
||||
}
|
||||
|
||||
log.Printf("Google Webhook: Processing type %d for user %d (subscription: %s)",
|
||||
notification.NotificationType, user.ID, notification.SubscriptionID)
|
||||
|
||||
switch notification.NotificationType {
|
||||
case GoogleSubPurchased:
|
||||
return h.handleGooglePurchased(user.ID, notification)
|
||||
|
||||
case GoogleSubRenewed:
|
||||
return h.handleGoogleRenewed(user.ID, notification)
|
||||
|
||||
case GoogleSubRecovered:
|
||||
return h.handleGoogleRecovered(user.ID, notification)
|
||||
|
||||
case GoogleSubCanceled:
|
||||
return h.handleGoogleCanceled(user.ID, notification)
|
||||
|
||||
case GoogleSubOnHold:
|
||||
return h.handleGoogleOnHold(user.ID, notification)
|
||||
|
||||
case GoogleSubInGracePeriod:
|
||||
return h.handleGoogleGracePeriod(user.ID, notification)
|
||||
|
||||
case GoogleSubRestarted:
|
||||
return h.handleGoogleRestarted(user.ID, notification)
|
||||
|
||||
case GoogleSubRevoked:
|
||||
return h.handleGoogleRevoked(user.ID, notification)
|
||||
|
||||
case GoogleSubExpired:
|
||||
return h.handleGoogleExpired(user.ID, notification)
|
||||
|
||||
case GoogleSubPaused:
|
||||
return h.handleGooglePaused(user.ID, notification)
|
||||
|
||||
default:
|
||||
log.Printf("Google Webhook: Unhandled notification type: %d", notification.NotificationType)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) findUserByGoogleToken(purchaseToken string) (*models.User, error) {
|
||||
subscription, err := h.subscriptionRepo.FindByGoogleToken(purchaseToken)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
user, err := h.userRepo.FindByID(subscription.UserID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return user, nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGooglePurchased(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// New subscription - we should have already processed this via the client
|
||||
// This is a backup notification
|
||||
log.Printf("Google Webhook: User %d purchased subscription %s", userID, notification.SubscriptionID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleRenewed(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// Need to query Google API for new expiry date
|
||||
// For now, extend by typical period (1 month for monthly, 1 year for yearly)
|
||||
var extension time.Duration
|
||||
if strings.Contains(notification.SubscriptionID, "monthly") {
|
||||
extension = 30 * 24 * time.Hour
|
||||
} else {
|
||||
extension = 365 * 24 * time.Hour
|
||||
}
|
||||
|
||||
newExpiry := time.Now().UTC().Add(extension)
|
||||
if err := h.subscriptionRepo.UpgradeToPro(userID, newExpiry, "android"); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Printf("Google Webhook: User %d renewed, extended to %v", userID, newExpiry)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleRecovered(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// Subscription recovered from account hold - reactivate
|
||||
newExpiry := time.Now().UTC().AddDate(0, 1, 0) // 1 month from now
|
||||
if err := h.subscriptionRepo.UpgradeToPro(userID, newExpiry, "android"); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Printf("Google Webhook: User %d subscription recovered", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleCanceled(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// User canceled - will expire at end of period
|
||||
now := time.Now().UTC()
|
||||
if err := h.subscriptionRepo.SetCancelledAt(userID, now); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := h.subscriptionRepo.SetAutoRenew(userID, false); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Printf("Google Webhook: User %d canceled, will expire at end of period", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleOnHold(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// Account hold - payment issue, may recover
|
||||
log.Printf("Google Webhook: User %d subscription on hold", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleGracePeriod(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// In grace period - user still has access but billing failed
|
||||
log.Printf("Google Webhook: User %d in grace period", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleRestarted(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// User restarted subscription
|
||||
newExpiry := time.Now().UTC().AddDate(0, 1, 0)
|
||||
if err := h.subscriptionRepo.UpgradeToPro(userID, newExpiry, "android"); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := h.subscriptionRepo.ClearCancelledAt(userID); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := h.subscriptionRepo.SetAutoRenew(userID, true); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Printf("Google Webhook: User %d restarted subscription", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleRevoked(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// Subscription revoked - immediate downgrade
|
||||
if err := h.subscriptionRepo.DowngradeToFree(userID); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Printf("Google Webhook: User %d subscription revoked", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGoogleExpired(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// Subscription expired
|
||||
if err := h.subscriptionRepo.DowngradeToFree(userID); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Printf("Google Webhook: User %d subscription expired", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *SubscriptionWebhookHandler) handleGooglePaused(userID uint, notification *GoogleSubscriptionNotification) error {
|
||||
// Subscription paused by user
|
||||
log.Printf("Google Webhook: User %d subscription paused", userID)
|
||||
return nil
|
||||
}
|
||||
|
||||
// ====================
|
||||
// Signature Verification (Optional but Recommended)
|
||||
// ====================
|
||||
|
||||
// VerifyAppleSignature verifies the JWS signature using Apple's root certificate
|
||||
// This is optional but recommended for production
|
||||
func (h *SubscriptionWebhookHandler) VerifyAppleSignature(signedPayload string) error {
|
||||
// Load Apple's root certificate if not already loaded
|
||||
if h.appleRootCerts == nil {
|
||||
// Apple's root certificates can be downloaded from:
|
||||
// https://www.apple.com/certificateauthority/
|
||||
// You'd typically embed these or load from a file
|
||||
return nil // Skip verification for now
|
||||
}
|
||||
|
||||
// Parse the JWS token
|
||||
token, err := jwt.Parse(signedPayload, func(token *jwt.Token) (interface{}, error) {
|
||||
// Get the x5c header (certificate chain)
|
||||
x5c, ok := token.Header["x5c"].([]interface{})
|
||||
if !ok || len(x5c) == 0 {
|
||||
return nil, fmt.Errorf("missing x5c header")
|
||||
}
|
||||
|
||||
// Decode the first certificate (leaf)
|
||||
certData, err := base64.StdEncoding.DecodeString(x5c[0].(string))
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to decode certificate: %w", err)
|
||||
}
|
||||
|
||||
cert, err := x509.ParseCertificate(certData)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to parse certificate: %w", err)
|
||||
}
|
||||
|
||||
// Verify the certificate chain (simplified)
|
||||
// In production, you should verify the full chain
|
||||
|
||||
return cert.PublicKey.(*ecdsa.PublicKey), nil
|
||||
})
|
||||
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to verify signature: %w", err)
|
||||
}
|
||||
|
||||
if !token.Valid {
|
||||
return fmt.Errorf("invalid token")
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// VerifyGooglePubSubToken verifies the Pub/Sub push token (if configured)
|
||||
func (h *SubscriptionWebhookHandler) VerifyGooglePubSubToken(c *gin.Context) bool {
|
||||
// If you configured a push endpoint with authentication, verify here
|
||||
// The token is typically in the Authorization header
|
||||
|
||||
// For now, we rely on the endpoint being protected by your infrastructure
|
||||
// (e.g., only accessible from Google's IP ranges)
|
||||
return true
|
||||
}
|
||||
|
||||
// Helper function to load Apple root certificates from file
|
||||
func loadAppleRootCertificates(certPath string) ([]*x509.Certificate, error) {
|
||||
data, err := os.ReadFile(certPath)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
var certs []*x509.Certificate
|
||||
for {
|
||||
block, rest := pem.Decode(data)
|
||||
if block == nil {
|
||||
break
|
||||
}
|
||||
if block.Type == "CERTIFICATE" {
|
||||
cert, err := x509.ParseCertificate(block.Bytes)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
certs = append(certs, cert)
|
||||
}
|
||||
data = rest
|
||||
}
|
||||
|
||||
return certs, nil
|
||||
}
|
||||
Reference in New Issue
Block a user