Updated subscriptions

backend/cmd/api/main.go

@@ -61,7 +61,7 @@ func main() {
 	notifConfigHandler := handlers.NewNotificationConfigHandler(notifConfigModel, userModel, cfg)
 	emailDigestHandler := handlers.NewEmailDigestHandler(emailDigestSvc, notifConfigModel)
 	statusHandler := handlers.NewStatusHandler(checkpointModel)
-	stripeHandler := handlers.NewStripeHandler(userModel, cfg)
+	stripeHandler := handlers.NewStripeHandler(userModel, alertRuleModel, cfg)
 	accountHandler := handlers.NewAccountHandler(userModel, addressModel, cfg)
 
 	authenticate := middleware.Authenticate(userModel)

backend/cmd/subscription-sweep/main.go

@@ -0,0 +1,68 @@
+// Package main runs a daily (cron-invoked) job: for paid tiers without an
+// active or trialling Stripe subscription, disable Firebase login and turn
+// off all alert rules until billing is restored via Stripe webhook / checkout.
+package main
+
+import (
+	"context"
+	"log"
+
+	"github.com/joho/godotenv"
+
+	"github.com/kjannette/koin-ping/backend/internal/config"
+	"github.com/kjannette/koin-ping/backend/internal/database"
+	"github.com/kjannette/koin-ping/backend/internal/firebase"
+	"github.com/kjannette/koin-ping/backend/internal/models"
+)
+
+func main() {
+	_ = godotenv.Load()
+
+	cfg, err := config.Load()
+	if err != nil {
+		log.Fatalf("Failed to load config: %v", err)
+	}
+
+	if err := firebase.Init(cfg.FirebaseProjectID); err != nil {
+		log.Fatalf("Failed to initialize Firebase: %v", err)
+	}
+
+	pool, connErr := database.Connect(cfg.DSN())
+	if connErr != nil {
+		log.Fatalf("Failed to connect to database: %v", connErr)
+	}
+
+	defer database.Close()
+
+	ctx := context.Background()
+	userModel := models.NewUserModel(pool)
+	alertModel := models.NewAlertRuleModel(pool)
+
+	users, listErr := userModel.ListPaidUsersWithoutActiveSubscription(ctx)
+	if listErr != nil {
+		log.Fatalf("Failed to list lapsed subscriptions: %v", listErr)
+	}
+
+	if len(users) == 0 {
+		log.Println("Subscription sweep: no lapsed paid users")
+		return
+	}
+
+	for _, u := range users {
+		if disableErr := firebase.SetUserDisabled(ctx, u.FirebaseUID, true); disableErr != nil {
+			log.Printf("Subscription sweep: Firebase disable failed user %s: %v", u.ID, disableErr)
+			continue
+		}
+
+		n, rulesErr := alertModel.DisableAllForUser(ctx, u.ID)
+		if rulesErr != nil {
+			log.Printf("Subscription sweep: disabling alerts failed for user %s: %v", u.ID, rulesErr)
+			continue
+		}
+
+		log.Printf(
+			"Subscription sweep: suspended user %s (%s tier, status=%s), disabled %d alert rules",
+			u.ID, u.SubscriptionTier, u.SubscriptionStatus, n,
+		)
+	}
+}

backend/internal/config/config.go

@@ -36,6 +36,8 @@ type Config struct {
 	StripeWebhookSecret          string
 	StripePriceIDPremium         string
 	StripePriceIDPro             string
+	StripePriceIDPremiumAnnual   string
+	StripePriceIDProAnnual       string
 	StripePublishableKey         string
 	FrontendURL                  string
 }
@@ -62,6 +64,8 @@ func Load() (*Config, error) {
 		StripeWebhookSecret:          os.Getenv("STRIPE_WEBHOOK_SECRET"),
 		StripePriceIDPremium:         os.Getenv("STRIPE_PRICE_ID_PREMIUM"),
 		StripePriceIDPro:             os.Getenv("STRIPE_PRICE_ID_PRO"),
+		StripePriceIDPremiumAnnual:   os.Getenv("STRIPE_PRICE_ID_PREMIUM_ANNUAL"),
+		StripePriceIDProAnnual:       os.Getenv("STRIPE_PRICE_ID_PRO_ANNUAL"),
 		StripePublishableKey:         os.Getenv("STRIPE_PUBLISHABLE_KEY"),
 		FrontendURL:                  getEnv("FRONTEND_URL", "http://localhost:3000"),
 	}
@@ -97,10 +101,13 @@ func (c *Config) DSN() string {
 // TierForPriceID maps a Stripe price ID back to the corresponding
 // subscription tier. Returns empty string if the price is unrecognised.
 func (c *Config) TierForPriceID(priceID string) string {
+	if priceID == "" {
+		return ""
+	}
 	switch priceID {
-	case c.StripePriceIDPremium:
+	case c.StripePriceIDPremium, c.StripePriceIDPremiumAnnual:
 		return "premium"
-	case c.StripePriceIDPro:
+	case c.StripePriceIDPro, c.StripePriceIDProAnnual:
 		return "pro"
 	default:
 		return ""

backend/internal/config/config_test.go

@@ -8,6 +8,8 @@ func TestTierForPriceID(t *testing.T) {
 	cfg := &Config{
 		StripePriceIDPremium:       "price_premium_123",
 		StripePriceIDPro:           "price_pro_456",
+		StripePriceIDPremiumAnnual: "price_premium_yr",
+		StripePriceIDProAnnual:     "price_pro_yr",
 	}
 
 	tests := []struct {
@@ -16,6 +18,8 @@ func TestTierForPriceID(t *testing.T) {
 	}{
 		{"price_premium_123", "premium"},
 		{"price_pro_456", "pro"},
+		{"price_premium_yr", "premium"},
+		{"price_pro_yr", "pro"},
 		{"price_unknown", ""},
 		{"", ""},
 	}

backend/internal/firebase/users.go

@@ -0,0 +1,22 @@
+package firebase
+
+import (
+	"context"
+	"fmt"
+
+	"firebase.google.com/go/v4/auth"
+)
+
+// SetUserDisabled updates the Firebase user record's disabled flag.
+func SetUserDisabled(ctx context.Context, uid string, disabled bool) error {
+	if authClient == nil {
+		return fmt.Errorf("firebase auth not initialized") //nolint:err113
+	}
+	if uid == "" {
+		return nil
+	}
+
+	params := (&auth.UserToUpdate{}).Disabled(disabled)
+	_, err := authClient.UpdateUser(ctx, uid, params)
+	return err
+}

backend/internal/handlers/account.go

@@ -38,8 +38,8 @@ type accountResponse struct {
 
 var tierPlanLabels = map[domain.SubscriptionTier]string{ //nolint:gochecknoglobals
 	domain.TierFree:    "Free Trial",
-	domain.TierPremium: "Premium / $1.99 mo",
+	domain.TierPremium: "Premium / $8.78 mo",
-	domain.TierPro:     "Pro / $11.99 mo",
+	domain.TierPro:     "Pro / $16.78 mo",
 }
 
 func (h *AccountHandler) GetAccount(w http.ResponseWriter, r *http.Request) {

backend/internal/handlers/stripe.go

@@ -1,36 +1,86 @@
 package handlers
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"io"
 	"log"
 	"net/http"
 
-	"github.com/stripe/stripe-go/v82"
+	kpfirebase "github.com/kjannette/koin-ping/backend/internal/firebase"
-	portalsession "github.com/stripe/stripe-go/v82/billingportal/session"
-	checkoutsession "github.com/stripe/stripe-go/v82/checkout/session"
-	"github.com/stripe/stripe-go/v82/webhook"
-
 	"github.com/kjannette/koin-ping/backend/internal/config"
 	"github.com/kjannette/koin-ping/backend/internal/domain"
 	"github.com/kjannette/koin-ping/backend/internal/middleware"
 	"github.com/kjannette/koin-ping/backend/internal/models"
+	"github.com/stripe/stripe-go/v82"
+	portalsession "github.com/stripe/stripe-go/v82/billingportal/session"
+	checkoutsession "github.com/stripe/stripe-go/v82/checkout/session"
+	"github.com/stripe/stripe-go/v82/webhook"
 )
 
 const webhookMaxBodyBytes = 65536
 
 type StripeHandler struct {
 	users  *models.UserModel
+	alerts *models.AlertRuleModel
 	cfg    *config.Config
 }
 
-func NewStripeHandler(users *models.UserModel, cfg *config.Config) *StripeHandler {
+func NewStripeHandler(users *models.UserModel, alerts *models.AlertRuleModel, cfg *config.Config) *StripeHandler {
 	stripe.Key = cfg.StripeSecretKey
-	return &StripeHandler{users: users, cfg: cfg}
+	return &StripeHandler{users: users, alerts: alerts, cfg: cfg}
 }
 
-func (h *StripeHandler) priceIDForTier(tier domain.SubscriptionTier) (string, error) {
+func (h *StripeHandler) ensureUserFirebaseAndAlertsEnabled(ctx context.Context, localUserID string) {
+	user, err := h.users.GetByID(ctx, localUserID)
+	if err != nil || user == nil || user.FirebaseUID == "" {
+		return
+	}
+	if firebaseErr := kpfirebase.SetUserDisabled(ctx, user.FirebaseUID, false); firebaseErr != nil {
+		log.Printf("Billing access restore: firebase enable failed for user %s: %v", localUserID, firebaseErr)
+
+		return
+	}
+
+	n, alertsErr := h.alerts.EnableAllForUser(ctx, localUserID)
+	if alertsErr != nil {
+		log.Printf("Billing access restore: enable alerts failed for user %s: %v", localUserID, alertsErr)
+
+		return
+	}
+
+	log.Printf("Billing access restored: user %s, %d alert rules enabled", localUserID, n)
+}
+
+func (h *StripeHandler) restorePaidSubscriptionAccess(ctx context.Context, stripeCustomerID, status string) {
+	if stripeCustomerID == "" || (status != "active" && status != "trialing") {
+		return
+	}
+
+	u, err := h.users.GetByStripeCustomerID(ctx, stripeCustomerID)
+	if err != nil || u == nil {
+		if err != nil {
+			log.Printf("restorePaidSubscriptionAccess: lookup %s: %v", stripeCustomerID, err)
+		}
+
+		return
+	}
+
+	h.ensureUserFirebaseAndAlertsEnabled(ctx, u.ID)
+}
+
+func (h *StripeHandler) priceIDForTier(tier domain.SubscriptionTier, interval string) (string, error) {
+	if interval == "annual" {
+		switch tier {
+		case domain.TierPremium:
+			return h.cfg.StripePriceIDPremiumAnnual, nil
+		case domain.TierPro:
+			return h.cfg.StripePriceIDProAnnual, nil
+		default:
+			return "", fmt.Errorf("no Stripe price for tier %q", tier) //nolint:err113
+		}
+	}
 	switch tier {
 	case domain.TierPremium:
 		return h.cfg.StripePriceIDPremium, nil
@@ -47,6 +97,7 @@ func (h *StripeHandler) CreateCheckoutSession(w http.ResponseWriter, r *http.Req
 
 	var body struct {
 		Tier     string `json:"tier"`
+		Interval string `json:"interval"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
 		writeError(w, http.StatusBadRequest, "BAD_REQUEST", "Invalid request body")
@@ -56,6 +107,9 @@ func (h *StripeHandler) CreateCheckoutSession(w http.ResponseWriter, r *http.Req
 	if body.Tier == "" {
 		body.Tier = "premium"
 	}
+	if body.Interval == "" {
+		body.Interval = "annual"
+	}
 
 	tier := domain.SubscriptionTier(body.Tier)
 	if tier != domain.TierPremium && tier != domain.TierPro {
@@ -63,7 +117,7 @@ func (h *StripeHandler) CreateCheckoutSession(w http.ResponseWriter, r *http.Req
 		return
 	}
 
-	priceID, err := h.priceIDForTier(tier)
+	priceID, err := h.priceIDForTier(tier, body.Interval)
 	if err != nil {
 		writeError(w, http.StatusBadRequest, "VALIDATION_ERROR", err.Error())
 		return
@@ -177,6 +231,8 @@ func (h *StripeHandler) VerifyCheckoutSession(w http.ResponseWriter, r *http.Req
 	if subscriptionID != "" && customerID != "" {
 		if err := h.users.ActivateSubscription(r.Context(), customerID, subscriptionID, "active", tier); err != nil {
 			log.Printf("VerifyCheckout: failed to activate subscription: %v", err)
+		} else {
+			h.restorePaidSubscriptionAccess(r.Context(), customerID, "active")
 		}
 	}
 
@@ -197,6 +253,8 @@ func (h *StripeHandler) ActivateFreeTier(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	h.ensureUserFirebaseAndAlertsEnabled(r.Context(), userID)
+
 	log.Printf("Free tier activated for user %s", userID)
 	writeJSON(w, http.StatusOK, map[string]string{
 		"subscription_status": "active",
@@ -211,6 +269,7 @@ func (h *StripeHandler) CreateOnboardingCheckout(w http.ResponseWriter, r *http.
 	var body struct {
 		Email    string `json:"email"`
 		Tier     string `json:"tier"`
+		Interval string `json:"interval"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
 		writeError(w, http.StatusBadRequest, "BAD_REQUEST", "Invalid request body")
@@ -225,6 +284,9 @@ func (h *StripeHandler) CreateOnboardingCheckout(w http.ResponseWriter, r *http.
 	if body.Tier == "" {
 		body.Tier = "premium"
 	}
+	if body.Interval == "" {
+		body.Interval = "annual"
+	}
 
 	tier := domain.SubscriptionTier(body.Tier)
 	if tier != domain.TierPremium && tier != domain.TierPro {
@@ -232,7 +294,7 @@ func (h *StripeHandler) CreateOnboardingCheckout(w http.ResponseWriter, r *http.
 		return
 	}
 
-	priceID, err := h.priceIDForTier(tier)
+	priceID, err := h.priceIDForTier(tier, body.Interval)
 	if err != nil {
 		writeError(w, http.StatusBadRequest, "VALIDATION_ERROR", err.Error())
 		return
@@ -362,6 +424,8 @@ func (h *StripeHandler) handleCheckoutCompleted(r *http.Request, event stripe.Ev
 	if subscriptionID != "" && customerID != "" {
 		if err := h.users.ActivateSubscription(r.Context(), customerID, subscriptionID, "active", tier); err != nil {
 			log.Printf("Failed to activate subscription: %v", err)
+		} else {
+			h.restorePaidSubscriptionAccess(r.Context(), customerID, "active")
 		}
 	}
 
@@ -401,8 +465,12 @@ func (h *StripeHandler) handleSubscriptionUpdated(r *http.Request, event stripe.
 
 	if err := h.users.ActivateSubscription(r.Context(), customerID, sub.ID, status, tier); err != nil {
 		log.Printf("Failed to update subscription: %v", err)
+
+		return
 	}
 
+	h.restorePaidSubscriptionAccess(r.Context(), customerID, status)
+
 	log.Printf("Subscription %s updated to %s (tier %s) for customer %s", sub.ID, status, tier, customerID)
 }
 

backend/internal/models/alert_rule.go

@@ -140,3 +140,33 @@ func (m *AlertRuleModel) Remove(ctx context.Context, id int) (bool, error) {
 	}
 	return tag.RowsAffected() > 0, nil
 }
+
+// DisableAllForUser sets enabled = false on every alert rule owned by addresses of userID.
+func (m *AlertRuleModel) DisableAllForUser(ctx context.Context, userID string) (int64, error) {
+	tag, err := m.pool.Exec(ctx,
+		`UPDATE alert_rules ar
+		 SET enabled = FALSE
+		 FROM addresses a
+		 WHERE ar.address_id = a.id AND a.user_id = $1`,
+		userID,
+	)
+	if err != nil {
+		return 0, err
+	}
+	return tag.RowsAffected(), nil
+}
+
+// EnableAllForUser sets enabled = true on every alert rule owned by addresses of userID.
+func (m *AlertRuleModel) EnableAllForUser(ctx context.Context, userID string) (int64, error) {
+	tag, err := m.pool.Exec(ctx,
+		`UPDATE alert_rules ar
+		 SET enabled = TRUE
+		 FROM addresses a
+		 WHERE ar.address_id = a.id AND a.user_id = $1`,
+		userID,
+	)
+	if err != nil {
+		return 0, err
+	}
+	return tag.RowsAffected(), nil
+}

backend/internal/models/user.go

@@ -130,6 +130,46 @@ func (m *UserModel) GetByID(ctx context.Context, id string) (*domain.User, error
 	return scanUser(row)
 }
 
+// GetByStripeCustomerID loads a user by their Stripe Customer ID if set.
+func (m *UserModel) GetByStripeCustomerID(ctx context.Context, stripeCustomerID string) (*domain.User, error) {
+	row := m.pool.QueryRow(ctx,
+		`SELECT `+userColumns+` FROM users WHERE stripe_customer_id = $1`,
+		stripeCustomerID,
+	)
+	return scanUser(row)
+}
+
+// ListPaidUsersWithoutActiveSubscription finds paid-tier rows whose Stripe
+// subscription is not active or trialing. Used by the periodic billing sweep.
+func (m *UserModel) ListPaidUsersWithoutActiveSubscription(ctx context.Context) ([]domain.User, error) {
+	rows, err := m.pool.Query(ctx,
+		`SELECT `+userColumns+` FROM users
+		 WHERE subscription_tier IN ('premium', 'pro')
+		   AND subscription_status NOT IN ('active', 'trialing')
+		   AND COALESCE(trim(firebase_uid), '') <> ''`,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := []domain.User{}
+	for rows.Next() {
+		var u domain.User
+		rowErr := rows.Scan(
+			&u.ID, &u.FirebaseUID, &u.Email, &u.DisplayName,
+			&u.StripeCustomerID, &u.StripeSubscriptionID, &u.SubscriptionStatus,
+			&u.SubscriptionTier, &u.SubscriptionCreatedAt, &u.CreatedAt, &u.UpdatedAt,
+		)
+		if rowErr != nil {
+			return nil, rowErr
+		}
+		out = append(out, u)
+	}
+
+	return out, rows.Err()
+}
+
 func (m *UserModel) UpdateStripeCustomer(ctx context.Context, userID, stripeCustomerID string) error {
 	_, err := m.pool.Exec(ctx,
 		`UPDATE users SET stripe_customer_id = $2, updated_at = NOW() WHERE id = $1`,

frontend/src/api/stripe.jsx

@@ -1,12 +1,12 @@
 import { getAuthHeaders } from "./authHeaders";
 import { API_BASE } from "./config";
 
-export async function createCheckoutSession(tier = "premium") {
+export async function createCheckoutSession(tier = "premium", interval = "annual") {
     const headers = await getAuthHeaders();
     const res = await fetch(`${API_BASE}/stripe/create-checkout-session`, {
         method: "POST",
         headers: { ...headers, "Content-Type": "application/json" },
-        body: JSON.stringify({ tier }),
+        body: JSON.stringify({ tier, interval }),
     });
     if (!res.ok) {
         const data = await res.json();

frontend/src/components/TierPicker.css

@@ -1,4 +1,45 @@
 .tier-picker {
+  display: flex;
+  flex-direction: column;
+  gap: 1.5rem;
+}
+
+.tier-picker__toggle {
+  display: flex;
+  justify-content: center;
+  gap: 0;
+}
+
+.tier-picker__toggle-btn {
+  padding: 0.75rem 1.5rem;
+  border: 1px solid var(--color-border);
+  background: transparent;
+  color: var(--color-text-dimmed);
+  cursor: pointer;
+  transition: all 0.2s;
+  font-weight: 500;
+}
+
+.tier-picker__toggle-btn:first-child {
+  border-radius: 8px 0 0 8px;
+}
+
+.tier-picker__toggle-btn:last-child {
+  border-radius: 0 8px 8px 0;
+  border-left: none;
+}
+
+.tier-picker__toggle-btn--active {
+  background: var(--color-primary);
+  color: white;
+  border-color: var(--color-primary);
+}
+
+.tier-picker__toggle-btn:last-child.tier-picker__toggle-btn--active {
+  border-left: 1px solid var(--color-primary);
+}
+
+.tier-picker__cards {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
   gap: 1rem;
@@ -112,7 +153,7 @@
 }
 
 @media (max-width: 768px) {
-  .tier-picker {
+  .tier-picker__cards {
     grid-template-columns: 1fr;
     max-width: 400px;
     margin: 0 auto;

frontend/src/components/TierPicker.jsx

@@ -1,11 +1,12 @@
+import { useState } from "react";
 import "./TierPicker.css";
 
 const TIERS = [
   {
     id: "free",
     name: "Trial Monitoring",
-    price: "$0",
+    price: { monthly: "$0", annual: "$0" },
-    period: "",
+    period: { monthly: "", annual: "" },
     features: [
       "Monitor 1 blockchain address 24/7",
       "Configure alerts to fire on trigger events",
@@ -16,8 +17,8 @@ const TIERS = [
   {
     id: "premium",
     name: "Premium Monitoring",
-    price: "$1.99",
+    price: { monthly: "$8.78", annual: "$94.78" },
-    period: "/month",
+    period: { monthly: "/month", annual: "/year" },
     features: [
       "Monitor 3 blockchain addresses",
       "Configure two types of rule-based alerts to fire on trigger events for each of the three addresses",
@@ -31,8 +32,8 @@ const TIERS = [
   {
     id: "pro",
     name: "Professional Monitoring",
-    price: "$11.99",
+    price: { monthly: "$16.78", annual: "$181.78" },
-    period: "/month",
+    period: { monthly: "/month", annual: "/year" },
     features: [
       "Monitor unlimited blockchain addresses",
       "Configure unlimited alert rules to fire on unlimited events on any address",
@@ -47,8 +48,26 @@ const TIERS = [
 ];
 
 export default function TierPicker({ onSelect, selectedTier }) {
+  const [isAnnual, setIsAnnual] = useState(true);
+
   return (
     <div className="tier-picker">
+      <div className="tier-picker__toggle">
+        <button
+          className={`tier-picker__toggle-btn${!isAnnual ? " tier-picker__toggle-btn--active" : ""}`}
+          onClick={() => setIsAnnual(false)}
+        >
+          Monthly
+        </button>
+        <button
+          className={`tier-picker__toggle-btn${isAnnual ? " tier-picker__toggle-btn--active" : ""}`}
+          onClick={() => setIsAnnual(true)}
+        >
+          Annual
+        </button>
+      </div>
+
+      <div className="tier-picker__cards">
         {TIERS.map((tier) => (
           <div
             key={tier.id}
@@ -59,9 +78,13 @@ export default function TierPicker({ onSelect, selectedTier }) {
             )}
             <h3 className="tier-picker__name">{tier.name}</h3>
             <div className="tier-picker__price">
-            <span className="tier-picker__amount">{tier.price}</span>
+              <span className="tier-picker__amount">
-            {tier.period && (
+                {isAnnual ? tier.price.annual : tier.price.monthly}
-              <span className="tier-picker__period">{tier.period}</span>
+              </span>
+              {(isAnnual ? tier.period.annual : tier.period.monthly) && (
+                <span className="tier-picker__period">
+                  {isAnnual ? tier.period.annual : tier.period.monthly}
+                </span>
               )}
             </div>
             <ul className="tier-picker__features">
@@ -78,12 +101,13 @@ export default function TierPicker({ onSelect, selectedTier }) {
             </ul>
             <button
               className={`btn tier-picker__btn${selectedTier === tier.id ? " tier-picker__btn--selected" : ""}`}
-            onClick={() => onSelect(tier.id)}
+              onClick={() => onSelect(tier.id, isAnnual ? "annual" : "monthly")}
             >
               {selectedTier === tier.id ? "Selected" : "Select"}
             </button>
           </div>
         ))}
       </div>
+    </div>
   );
 }

frontend/src/index.css

@@ -412,6 +412,8 @@ button {
   }
 
   .page {
+    background-color: var(--color-bg);
+    height: 920px;
     padding: 1rem 0.75rem;
   }
 

frontend/src/pages/addresses/Addresses.css

@@ -33,8 +33,9 @@
 
 @media (max-width: 480px) {
   .address__remove {
-    margin-left: 0.5rem;
+    padding: 0rem 0.9rem;
-    padding: 0.25rem 0.5rem;
     font-size: 0.8rem;
+    margin-left: -3rem;
+    margin-bottom: 2rem;
   }
 }

frontend/src/pages/subscribe/Subscribe.jsx

@@ -39,6 +39,7 @@ export default function Subscribe() {
     password: "",
     confirmPassword: "",
     selectedTier: null,
+    billingInterval: "annual",
   });
   const [error, setError] = useState(
     searchParams.get("payment") === "cancelled"
@@ -126,7 +127,7 @@ export default function Subscribe() {
         await refreshAccount();
         navigate("/addresses", { replace: true });
       } else {
-        const { url } = await createCheckoutSession(data.selectedTier);
+        const { url } = await createCheckoutSession(data.selectedTier, data.billingInterval);
         window.location.href = url;
       }
     } catch (err) {
@@ -245,7 +246,10 @@ export default function Subscribe() {
           Select the plan that works best for you. You can upgrade anytime.
         </p>
         <TierPicker
-          onSelect={(tier) => set("selectedTier", tier)}
+          onSelect={(tier, interval) => {
+            set("selectedTier", tier);
+            set("billingInterval", interval);
+          }}
           selectedTier={data.selectedTier}
         />
       </>