1use anyhow::{Context, anyhow, bail};
2use axum::{
3 Extension, Json, Router,
4 extract::{self, Query},
5 routing::{get, post},
6};
7use chrono::{DateTime, SecondsFormat, Utc};
8use collections::HashSet;
9use reqwest::StatusCode;
10use sea_orm::ActiveValue;
11use serde::{Deserialize, Serialize};
12use serde_json::json;
13use std::{str::FromStr, sync::Arc, time::Duration};
14use stripe::{
15 BillingPortalSession, CancellationDetailsReason, CreateBillingPortalSession,
16 CreateBillingPortalSessionFlowData, CreateBillingPortalSessionFlowDataAfterCompletion,
17 CreateBillingPortalSessionFlowDataAfterCompletionRedirect,
18 CreateBillingPortalSessionFlowDataSubscriptionUpdateConfirm,
19 CreateBillingPortalSessionFlowDataSubscriptionUpdateConfirmItems,
20 CreateBillingPortalSessionFlowDataType, CreateCustomer, Customer, CustomerId, EventObject,
21 EventType, Expandable, ListEvents, Subscription, SubscriptionId, SubscriptionStatus,
22};
23use util::{ResultExt, maybe};
24
25use crate::api::events::SnowflakeRow;
26use crate::db::billing_subscription::{
27 StripeCancellationReason, StripeSubscriptionStatus, SubscriptionKind,
28};
29use crate::llm::{DEFAULT_MAX_MONTHLY_SPEND, FREE_TIER_MONTHLY_SPENDING_LIMIT};
30use crate::rpc::{ResultExt as _, Server};
31use crate::{AppState, Cents, Error, Result};
32use crate::{db::UserId, llm::db::LlmDatabase};
33use crate::{
34 db::{
35 BillingSubscriptionId, CreateBillingCustomerParams, CreateBillingSubscriptionParams,
36 CreateProcessedStripeEventParams, UpdateBillingCustomerParams,
37 UpdateBillingPreferencesParams, UpdateBillingSubscriptionParams, billing_customer,
38 },
39 stripe_billing::StripeBilling,
40};
41
42pub fn router() -> Router {
43 Router::new()
44 .route(
45 "/billing/preferences",
46 get(get_billing_preferences).put(update_billing_preferences),
47 )
48 .route(
49 "/billing/subscriptions",
50 get(list_billing_subscriptions).post(create_billing_subscription),
51 )
52 .route(
53 "/billing/subscriptions/manage",
54 post(manage_billing_subscription),
55 )
56 .route("/billing/monthly_spend", get(get_monthly_spend))
57 .route("/billing/usage", get(get_current_usage))
58}
59
60#[derive(Debug, Deserialize)]
61struct GetBillingPreferencesParams {
62 github_user_id: i32,
63}
64
65#[derive(Debug, Serialize)]
66struct BillingPreferencesResponse {
67 max_monthly_llm_usage_spending_in_cents: i32,
68}
69
70async fn get_billing_preferences(
71 Extension(app): Extension<Arc<AppState>>,
72 Query(params): Query<GetBillingPreferencesParams>,
73) -> Result<Json<BillingPreferencesResponse>> {
74 let user = app
75 .db
76 .get_user_by_github_user_id(params.github_user_id)
77 .await?
78 .ok_or_else(|| anyhow!("user not found"))?;
79
80 let preferences = app.db.get_billing_preferences(user.id).await?;
81
82 Ok(Json(BillingPreferencesResponse {
83 max_monthly_llm_usage_spending_in_cents: preferences
84 .map_or(DEFAULT_MAX_MONTHLY_SPEND.0 as i32, |preferences| {
85 preferences.max_monthly_llm_usage_spending_in_cents
86 }),
87 }))
88}
89
90#[derive(Debug, Deserialize)]
91struct UpdateBillingPreferencesBody {
92 github_user_id: i32,
93 max_monthly_llm_usage_spending_in_cents: i32,
94}
95
96async fn update_billing_preferences(
97 Extension(app): Extension<Arc<AppState>>,
98 Extension(rpc_server): Extension<Arc<crate::rpc::Server>>,
99 extract::Json(body): extract::Json<UpdateBillingPreferencesBody>,
100) -> Result<Json<BillingPreferencesResponse>> {
101 let user = app
102 .db
103 .get_user_by_github_user_id(body.github_user_id)
104 .await?
105 .ok_or_else(|| anyhow!("user not found"))?;
106
107 let max_monthly_llm_usage_spending_in_cents =
108 body.max_monthly_llm_usage_spending_in_cents.max(0);
109
110 let billing_preferences =
111 if let Some(_billing_preferences) = app.db.get_billing_preferences(user.id).await? {
112 app.db
113 .update_billing_preferences(
114 user.id,
115 &UpdateBillingPreferencesParams {
116 max_monthly_llm_usage_spending_in_cents: ActiveValue::set(
117 max_monthly_llm_usage_spending_in_cents,
118 ),
119 },
120 )
121 .await?
122 } else {
123 app.db
124 .create_billing_preferences(
125 user.id,
126 &crate::db::CreateBillingPreferencesParams {
127 max_monthly_llm_usage_spending_in_cents,
128 },
129 )
130 .await?
131 };
132
133 SnowflakeRow::new(
134 "Spend Limit Updated",
135 Some(user.metrics_id),
136 user.admin,
137 None,
138 json!({
139 "user_id": user.id,
140 "max_monthly_llm_usage_spending_in_cents": billing_preferences.max_monthly_llm_usage_spending_in_cents,
141 }),
142 )
143 .write(&app.kinesis_client, &app.config.kinesis_stream)
144 .await
145 .log_err();
146
147 rpc_server.refresh_llm_tokens_for_user(user.id).await;
148
149 Ok(Json(BillingPreferencesResponse {
150 max_monthly_llm_usage_spending_in_cents: billing_preferences
151 .max_monthly_llm_usage_spending_in_cents,
152 }))
153}
154
155#[derive(Debug, Deserialize)]
156struct ListBillingSubscriptionsParams {
157 github_user_id: i32,
158}
159
160#[derive(Debug, Serialize)]
161struct BillingSubscriptionJson {
162 id: BillingSubscriptionId,
163 name: String,
164 status: StripeSubscriptionStatus,
165 trial_end_at: Option<String>,
166 cancel_at: Option<String>,
167 /// Whether this subscription can be canceled.
168 is_cancelable: bool,
169}
170
171#[derive(Debug, Serialize)]
172struct ListBillingSubscriptionsResponse {
173 subscriptions: Vec<BillingSubscriptionJson>,
174}
175
176async fn list_billing_subscriptions(
177 Extension(app): Extension<Arc<AppState>>,
178 Query(params): Query<ListBillingSubscriptionsParams>,
179) -> Result<Json<ListBillingSubscriptionsResponse>> {
180 let user = app
181 .db
182 .get_user_by_github_user_id(params.github_user_id)
183 .await?
184 .ok_or_else(|| anyhow!("user not found"))?;
185
186 let subscriptions = app.db.get_billing_subscriptions(user.id).await?;
187
188 Ok(Json(ListBillingSubscriptionsResponse {
189 subscriptions: subscriptions
190 .into_iter()
191 .map(|subscription| BillingSubscriptionJson {
192 id: subscription.id,
193 name: match subscription.kind {
194 Some(SubscriptionKind::ZedPro) => "Zed Pro".to_string(),
195 Some(SubscriptionKind::ZedProTrial) => "Zed Pro (Trial)".to_string(),
196 Some(SubscriptionKind::ZedFree) => "Zed Free".to_string(),
197 None => "Zed LLM Usage".to_string(),
198 },
199 status: subscription.stripe_subscription_status,
200 trial_end_at: if subscription.kind == Some(SubscriptionKind::ZedProTrial) {
201 maybe!({
202 let end_at = subscription.stripe_current_period_end?;
203 let end_at = DateTime::from_timestamp(end_at, 0)?;
204
205 Some(end_at.to_rfc3339_opts(SecondsFormat::Millis, true))
206 })
207 } else {
208 None
209 },
210 cancel_at: subscription.stripe_cancel_at.map(|cancel_at| {
211 cancel_at
212 .and_utc()
213 .to_rfc3339_opts(SecondsFormat::Millis, true)
214 }),
215 is_cancelable: subscription.stripe_subscription_status.is_cancelable()
216 && subscription.stripe_cancel_at.is_none(),
217 })
218 .collect(),
219 }))
220}
221
222#[derive(Debug, Clone, Copy, Deserialize)]
223#[serde(rename_all = "snake_case")]
224enum ProductCode {
225 ZedPro,
226 ZedProTrial,
227}
228
229#[derive(Debug, Deserialize)]
230struct CreateBillingSubscriptionBody {
231 github_user_id: i32,
232 product: Option<ProductCode>,
233}
234
235#[derive(Debug, Serialize)]
236struct CreateBillingSubscriptionResponse {
237 checkout_session_url: String,
238}
239
240/// Initiates a Stripe Checkout session for creating a billing subscription.
241async fn create_billing_subscription(
242 Extension(app): Extension<Arc<AppState>>,
243 extract::Json(body): extract::Json<CreateBillingSubscriptionBody>,
244) -> Result<Json<CreateBillingSubscriptionResponse>> {
245 let user = app
246 .db
247 .get_user_by_github_user_id(body.github_user_id)
248 .await?
249 .ok_or_else(|| anyhow!("user not found"))?;
250
251 let Some(stripe_client) = app.stripe_client.clone() else {
252 log::error!("failed to retrieve Stripe client");
253 Err(Error::http(
254 StatusCode::NOT_IMPLEMENTED,
255 "not supported".into(),
256 ))?
257 };
258 let Some(stripe_billing) = app.stripe_billing.clone() else {
259 log::error!("failed to retrieve Stripe billing object");
260 Err(Error::http(
261 StatusCode::NOT_IMPLEMENTED,
262 "not supported".into(),
263 ))?
264 };
265 let Some(llm_db) = app.llm_db.clone() else {
266 log::error!("failed to retrieve LLM database");
267 Err(Error::http(
268 StatusCode::NOT_IMPLEMENTED,
269 "not supported".into(),
270 ))?
271 };
272
273 if app.db.has_active_billing_subscription(user.id).await? {
274 return Err(Error::http(
275 StatusCode::CONFLICT,
276 "user already has an active subscription".into(),
277 ));
278 }
279
280 let existing_billing_customer = app.db.get_billing_customer_by_user_id(user.id).await?;
281 if let Some(existing_billing_customer) = &existing_billing_customer {
282 if existing_billing_customer.has_overdue_invoices {
283 return Err(Error::http(
284 StatusCode::PAYMENT_REQUIRED,
285 "user has overdue invoices".into(),
286 ));
287 }
288 }
289
290 let customer_id = if let Some(existing_customer) = existing_billing_customer {
291 CustomerId::from_str(&existing_customer.stripe_customer_id)
292 .context("failed to parse customer ID")?
293 } else {
294 let customer = Customer::create(
295 &stripe_client,
296 CreateCustomer {
297 email: user.email_address.as_deref(),
298 ..Default::default()
299 },
300 )
301 .await?;
302
303 customer.id
304 };
305
306 let success_url = format!(
307 "{}/account?checkout_complete=1",
308 app.config.zed_dot_dev_url()
309 );
310
311 let checkout_session_url = match body.product {
312 Some(ProductCode::ZedPro) => {
313 stripe_billing
314 .checkout_with_price(
315 app.config.zed_pro_price_id()?,
316 customer_id,
317 &user.github_login,
318 &success_url,
319 )
320 .await?
321 }
322 Some(ProductCode::ZedProTrial) => {
323 stripe_billing
324 .checkout_with_price(
325 app.config.zed_pro_trial_price_id()?,
326 customer_id,
327 &user.github_login,
328 &success_url,
329 )
330 .await?
331 }
332 None => {
333 let default_model = llm_db.model(
334 zed_llm_client::LanguageModelProvider::Anthropic,
335 "claude-3-7-sonnet",
336 )?;
337 let stripe_model = stripe_billing.register_model(default_model).await?;
338 stripe_billing
339 .checkout(customer_id, &user.github_login, &stripe_model, &success_url)
340 .await?
341 }
342 };
343
344 Ok(Json(CreateBillingSubscriptionResponse {
345 checkout_session_url,
346 }))
347}
348
349#[derive(Debug, PartialEq, Deserialize)]
350#[serde(rename_all = "snake_case")]
351enum ManageSubscriptionIntent {
352 /// The user intends to manage their subscription.
353 ///
354 /// This will open the Stripe billing portal without putting the user in a specific flow.
355 ManageSubscription,
356 /// The user intends to upgrade to Zed Pro.
357 UpgradeToPro,
358 /// The user intends to cancel their subscription.
359 Cancel,
360 /// The user intends to stop the cancellation of their subscription.
361 StopCancellation,
362}
363
364#[derive(Debug, Deserialize)]
365struct ManageBillingSubscriptionBody {
366 github_user_id: i32,
367 intent: ManageSubscriptionIntent,
368 /// The ID of the subscription to manage.
369 subscription_id: BillingSubscriptionId,
370}
371
372#[derive(Debug, Serialize)]
373struct ManageBillingSubscriptionResponse {
374 billing_portal_session_url: Option<String>,
375}
376
377/// Initiates a Stripe customer portal session for managing a billing subscription.
378async fn manage_billing_subscription(
379 Extension(app): Extension<Arc<AppState>>,
380 extract::Json(body): extract::Json<ManageBillingSubscriptionBody>,
381) -> Result<Json<ManageBillingSubscriptionResponse>> {
382 let user = app
383 .db
384 .get_user_by_github_user_id(body.github_user_id)
385 .await?
386 .ok_or_else(|| anyhow!("user not found"))?;
387
388 let Some(stripe_client) = app.stripe_client.clone() else {
389 log::error!("failed to retrieve Stripe client");
390 Err(Error::http(
391 StatusCode::NOT_IMPLEMENTED,
392 "not supported".into(),
393 ))?
394 };
395
396 let customer = app
397 .db
398 .get_billing_customer_by_user_id(user.id)
399 .await?
400 .ok_or_else(|| anyhow!("billing customer not found"))?;
401 let customer_id = CustomerId::from_str(&customer.stripe_customer_id)
402 .context("failed to parse customer ID")?;
403
404 let subscription = app
405 .db
406 .get_billing_subscription_by_id(body.subscription_id)
407 .await?
408 .ok_or_else(|| anyhow!("subscription not found"))?;
409 let subscription_id = SubscriptionId::from_str(&subscription.stripe_subscription_id)
410 .context("failed to parse subscription ID")?;
411
412 if body.intent == ManageSubscriptionIntent::StopCancellation {
413 let updated_stripe_subscription = Subscription::update(
414 &stripe_client,
415 &subscription_id,
416 stripe::UpdateSubscription {
417 cancel_at_period_end: Some(false),
418 ..Default::default()
419 },
420 )
421 .await?;
422
423 app.db
424 .update_billing_subscription(
425 subscription.id,
426 &UpdateBillingSubscriptionParams {
427 stripe_cancel_at: ActiveValue::set(
428 updated_stripe_subscription
429 .cancel_at
430 .and_then(|cancel_at| DateTime::from_timestamp(cancel_at, 0))
431 .map(|time| time.naive_utc()),
432 ),
433 ..Default::default()
434 },
435 )
436 .await?;
437
438 return Ok(Json(ManageBillingSubscriptionResponse {
439 billing_portal_session_url: None,
440 }));
441 }
442
443 let flow = match body.intent {
444 ManageSubscriptionIntent::ManageSubscription => None,
445 ManageSubscriptionIntent::UpgradeToPro => {
446 let zed_pro_price_id = app.config.zed_pro_price_id()?;
447 let zed_pro_trial_price_id = app.config.zed_pro_trial_price_id()?;
448 let zed_free_price_id = app.config.zed_free_price_id()?;
449
450 let stripe_subscription =
451 Subscription::retrieve(&stripe_client, &subscription_id, &[]).await?;
452
453 let subscription_item_to_update = stripe_subscription
454 .items
455 .data
456 .iter()
457 .find_map(|item| {
458 let price = item.price.as_ref()?;
459
460 if price.id == zed_free_price_id || price.id == zed_pro_trial_price_id {
461 Some(item.id.clone())
462 } else {
463 None
464 }
465 })
466 .ok_or_else(|| anyhow!("No subscription item to update"))?;
467
468 Some(CreateBillingPortalSessionFlowData {
469 type_: CreateBillingPortalSessionFlowDataType::SubscriptionUpdateConfirm,
470 subscription_update_confirm: Some(
471 CreateBillingPortalSessionFlowDataSubscriptionUpdateConfirm {
472 subscription: subscription.stripe_subscription_id,
473 items: vec![
474 CreateBillingPortalSessionFlowDataSubscriptionUpdateConfirmItems {
475 id: subscription_item_to_update.to_string(),
476 price: Some(zed_pro_price_id.to_string()),
477 quantity: Some(1),
478 },
479 ],
480 discounts: None,
481 },
482 ),
483 ..Default::default()
484 })
485 }
486 ManageSubscriptionIntent::Cancel => Some(CreateBillingPortalSessionFlowData {
487 type_: CreateBillingPortalSessionFlowDataType::SubscriptionCancel,
488 after_completion: Some(CreateBillingPortalSessionFlowDataAfterCompletion {
489 type_: stripe::CreateBillingPortalSessionFlowDataAfterCompletionType::Redirect,
490 redirect: Some(CreateBillingPortalSessionFlowDataAfterCompletionRedirect {
491 return_url: format!("{}/account", app.config.zed_dot_dev_url()),
492 }),
493 ..Default::default()
494 }),
495 subscription_cancel: Some(
496 stripe::CreateBillingPortalSessionFlowDataSubscriptionCancel {
497 subscription: subscription.stripe_subscription_id,
498 retention: None,
499 },
500 ),
501 ..Default::default()
502 }),
503 ManageSubscriptionIntent::StopCancellation => unreachable!(),
504 };
505
506 let mut params = CreateBillingPortalSession::new(customer_id);
507 params.flow_data = flow;
508 let return_url = format!("{}/account", app.config.zed_dot_dev_url());
509 params.return_url = Some(&return_url);
510
511 let session = BillingPortalSession::create(&stripe_client, params).await?;
512
513 Ok(Json(ManageBillingSubscriptionResponse {
514 billing_portal_session_url: Some(session.url),
515 }))
516}
517
518/// The amount of time we wait in between each poll of Stripe events.
519///
520/// This value should strike a balance between:
521/// 1. Being short enough that we update quickly when something in Stripe changes
522/// 2. Being long enough that we don't eat into our rate limits.
523///
524/// As a point of reference, the Sequin folks say they have this at **500ms**:
525///
526/// > We poll the Stripe /events endpoint every 500ms per account
527/// >
528/// > — https://blog.sequinstream.com/events-not-webhooks/
529const POLL_EVENTS_INTERVAL: Duration = Duration::from_secs(5);
530
531/// The maximum number of events to return per page.
532///
533/// We set this to 100 (the max) so we have to make fewer requests to Stripe.
534///
535/// > Limit can range between 1 and 100, and the default is 10.
536const EVENTS_LIMIT_PER_PAGE: u64 = 100;
537
538/// The number of pages consisting entirely of already-processed events that we
539/// will see before we stop retrieving events.
540///
541/// This is used to prevent over-fetching the Stripe events API for events we've
542/// already seen and processed.
543const NUMBER_OF_ALREADY_PROCESSED_PAGES_BEFORE_WE_STOP: usize = 4;
544
545/// Polls the Stripe events API periodically to reconcile the records in our
546/// database with the data in Stripe.
547pub fn poll_stripe_events_periodically(app: Arc<AppState>, rpc_server: Arc<Server>) {
548 let Some(stripe_client) = app.stripe_client.clone() else {
549 log::warn!("failed to retrieve Stripe client");
550 return;
551 };
552
553 let executor = app.executor.clone();
554 executor.spawn_detached({
555 let executor = executor.clone();
556 async move {
557 loop {
558 poll_stripe_events(&app, &rpc_server, &stripe_client)
559 .await
560 .log_err();
561
562 executor.sleep(POLL_EVENTS_INTERVAL).await;
563 }
564 }
565 });
566}
567
568async fn poll_stripe_events(
569 app: &Arc<AppState>,
570 rpc_server: &Arc<Server>,
571 stripe_client: &stripe::Client,
572) -> anyhow::Result<()> {
573 fn event_type_to_string(event_type: EventType) -> String {
574 // Calling `to_string` on `stripe::EventType` members gives us a quoted string,
575 // so we need to unquote it.
576 event_type.to_string().trim_matches('"').to_string()
577 }
578
579 let event_types = [
580 EventType::CustomerCreated,
581 EventType::CustomerUpdated,
582 EventType::CustomerSubscriptionCreated,
583 EventType::CustomerSubscriptionUpdated,
584 EventType::CustomerSubscriptionPaused,
585 EventType::CustomerSubscriptionResumed,
586 EventType::CustomerSubscriptionDeleted,
587 ]
588 .into_iter()
589 .map(event_type_to_string)
590 .collect::<Vec<_>>();
591
592 let mut pages_of_already_processed_events = 0;
593 let mut unprocessed_events = Vec::new();
594
595 log::info!(
596 "Stripe events: starting retrieval for {}",
597 event_types.join(", ")
598 );
599 let mut params = ListEvents::new();
600 params.types = Some(event_types.clone());
601 params.limit = Some(EVENTS_LIMIT_PER_PAGE);
602
603 let mut event_pages = stripe::Event::list(&stripe_client, ¶ms)
604 .await?
605 .paginate(params);
606
607 loop {
608 let processed_event_ids = {
609 let event_ids = event_pages
610 .page
611 .data
612 .iter()
613 .map(|event| event.id.as_str())
614 .collect::<Vec<_>>();
615 app.db
616 .get_processed_stripe_events_by_event_ids(&event_ids)
617 .await?
618 .into_iter()
619 .map(|event| event.stripe_event_id)
620 .collect::<Vec<_>>()
621 };
622
623 let mut processed_events_in_page = 0;
624 let events_in_page = event_pages.page.data.len();
625 for event in &event_pages.page.data {
626 if processed_event_ids.contains(&event.id.to_string()) {
627 processed_events_in_page += 1;
628 log::debug!("Stripe events: already processed '{}', skipping", event.id);
629 } else {
630 unprocessed_events.push(event.clone());
631 }
632 }
633
634 if processed_events_in_page == events_in_page {
635 pages_of_already_processed_events += 1;
636 }
637
638 if event_pages.page.has_more {
639 if pages_of_already_processed_events >= NUMBER_OF_ALREADY_PROCESSED_PAGES_BEFORE_WE_STOP
640 {
641 log::info!(
642 "Stripe events: stopping, saw {pages_of_already_processed_events} pages of already-processed events"
643 );
644 break;
645 } else {
646 log::info!("Stripe events: retrieving next page");
647 event_pages = event_pages.next(&stripe_client).await?;
648 }
649 } else {
650 break;
651 }
652 }
653
654 log::info!("Stripe events: unprocessed {}", unprocessed_events.len());
655
656 // Sort all of the unprocessed events in ascending order, so we can handle them in the order they occurred.
657 unprocessed_events.sort_by(|a, b| a.created.cmp(&b.created).then_with(|| a.id.cmp(&b.id)));
658
659 for event in unprocessed_events {
660 let event_id = event.id.clone();
661 let processed_event_params = CreateProcessedStripeEventParams {
662 stripe_event_id: event.id.to_string(),
663 stripe_event_type: event_type_to_string(event.type_),
664 stripe_event_created_timestamp: event.created,
665 };
666
667 // If the event has happened too far in the past, we don't want to
668 // process it and risk overwriting other more-recent updates.
669 //
670 // 1 day was chosen arbitrarily. This could be made longer or shorter.
671 let one_day = Duration::from_secs(24 * 60 * 60);
672 let a_day_ago = Utc::now() - one_day;
673 if a_day_ago.timestamp() > event.created {
674 log::info!(
675 "Stripe events: event '{}' is more than {one_day:?} old, marking as processed",
676 event_id
677 );
678 app.db
679 .create_processed_stripe_event(&processed_event_params)
680 .await?;
681
682 return Ok(());
683 }
684
685 let process_result = match event.type_ {
686 EventType::CustomerCreated | EventType::CustomerUpdated => {
687 handle_customer_event(app, stripe_client, event).await
688 }
689 EventType::CustomerSubscriptionCreated
690 | EventType::CustomerSubscriptionUpdated
691 | EventType::CustomerSubscriptionPaused
692 | EventType::CustomerSubscriptionResumed
693 | EventType::CustomerSubscriptionDeleted => {
694 handle_customer_subscription_event(app, rpc_server, stripe_client, event).await
695 }
696 _ => Ok(()),
697 };
698
699 if let Some(()) = process_result
700 .with_context(|| format!("failed to process event {event_id} successfully"))
701 .log_err()
702 {
703 app.db
704 .create_processed_stripe_event(&processed_event_params)
705 .await?;
706 }
707 }
708
709 Ok(())
710}
711
712async fn handle_customer_event(
713 app: &Arc<AppState>,
714 _stripe_client: &stripe::Client,
715 event: stripe::Event,
716) -> anyhow::Result<()> {
717 let EventObject::Customer(customer) = event.data.object else {
718 bail!("unexpected event payload for {}", event.id);
719 };
720
721 log::info!("handling Stripe {} event: {}", event.type_, event.id);
722
723 let Some(email) = customer.email else {
724 log::info!("Stripe customer has no email: skipping");
725 return Ok(());
726 };
727
728 let Some(user) = app.db.get_user_by_email(&email).await? else {
729 log::info!("no user found for email: skipping");
730 return Ok(());
731 };
732
733 if let Some(existing_customer) = app
734 .db
735 .get_billing_customer_by_stripe_customer_id(&customer.id)
736 .await?
737 {
738 app.db
739 .update_billing_customer(
740 existing_customer.id,
741 &UpdateBillingCustomerParams {
742 // For now we just leave the information as-is, as it is not
743 // likely to change.
744 ..Default::default()
745 },
746 )
747 .await?;
748 } else {
749 app.db
750 .create_billing_customer(&CreateBillingCustomerParams {
751 user_id: user.id,
752 stripe_customer_id: customer.id.to_string(),
753 })
754 .await?;
755 }
756
757 Ok(())
758}
759
760async fn handle_customer_subscription_event(
761 app: &Arc<AppState>,
762 rpc_server: &Arc<Server>,
763 stripe_client: &stripe::Client,
764 event: stripe::Event,
765) -> anyhow::Result<()> {
766 let EventObject::Subscription(subscription) = event.data.object else {
767 bail!("unexpected event payload for {}", event.id);
768 };
769
770 log::info!("handling Stripe {} event: {}", event.type_, event.id);
771
772 let subscription_kind = maybe!({
773 let zed_pro_price_id = app.config.zed_pro_price_id().ok()?;
774 let zed_pro_trial_price_id = app.config.zed_pro_trial_price_id().ok()?;
775 let zed_free_price_id = app.config.zed_free_price_id().ok()?;
776
777 subscription.items.data.iter().find_map(|item| {
778 let price = item.price.as_ref()?;
779
780 if price.id == zed_pro_price_id {
781 Some(SubscriptionKind::ZedPro)
782 } else if price.id == zed_pro_trial_price_id {
783 Some(SubscriptionKind::ZedProTrial)
784 } else if price.id == zed_free_price_id {
785 Some(SubscriptionKind::ZedFree)
786 } else {
787 None
788 }
789 })
790 });
791
792 let billing_customer =
793 find_or_create_billing_customer(app, stripe_client, subscription.customer)
794 .await?
795 .ok_or_else(|| anyhow!("billing customer not found"))?;
796
797 let was_canceled_due_to_payment_failure = subscription.status == SubscriptionStatus::Canceled
798 && subscription
799 .cancellation_details
800 .as_ref()
801 .and_then(|details| details.reason)
802 .map_or(false, |reason| {
803 reason == CancellationDetailsReason::PaymentFailed
804 });
805
806 if was_canceled_due_to_payment_failure {
807 app.db
808 .update_billing_customer(
809 billing_customer.id,
810 &UpdateBillingCustomerParams {
811 has_overdue_invoices: ActiveValue::set(true),
812 ..Default::default()
813 },
814 )
815 .await?;
816 }
817
818 if let Some(existing_subscription) = app
819 .db
820 .get_billing_subscription_by_stripe_subscription_id(&subscription.id)
821 .await?
822 {
823 app.db
824 .update_billing_subscription(
825 existing_subscription.id,
826 &UpdateBillingSubscriptionParams {
827 billing_customer_id: ActiveValue::set(billing_customer.id),
828 kind: ActiveValue::set(subscription_kind),
829 stripe_subscription_id: ActiveValue::set(subscription.id.to_string()),
830 stripe_subscription_status: ActiveValue::set(subscription.status.into()),
831 stripe_cancel_at: ActiveValue::set(
832 subscription
833 .cancel_at
834 .and_then(|cancel_at| DateTime::from_timestamp(cancel_at, 0))
835 .map(|time| time.naive_utc()),
836 ),
837 stripe_cancellation_reason: ActiveValue::set(
838 subscription
839 .cancellation_details
840 .and_then(|details| details.reason)
841 .map(|reason| reason.into()),
842 ),
843 stripe_current_period_start: ActiveValue::set(Some(
844 subscription.current_period_start,
845 )),
846 stripe_current_period_end: ActiveValue::set(Some(
847 subscription.current_period_end,
848 )),
849 },
850 )
851 .await?;
852 } else {
853 // If the user already has an active billing subscription, ignore the
854 // event and return an `Ok` to signal that it was processed
855 // successfully.
856 //
857 // There is the possibility that this could cause us to not create a
858 // subscription in the following scenario:
859 //
860 // 1. User has an active subscription A
861 // 2. User cancels subscription A
862 // 3. User creates a new subscription B
863 // 4. We process the new subscription B before the cancellation of subscription A
864 // 5. User ends up with no subscriptions
865 //
866 // In theory this situation shouldn't arise as we try to process the events in the order they occur.
867 if app
868 .db
869 .has_active_billing_subscription(billing_customer.user_id)
870 .await?
871 {
872 log::info!(
873 "user {user_id} already has an active subscription, skipping creation of subscription {subscription_id}",
874 user_id = billing_customer.user_id,
875 subscription_id = subscription.id
876 );
877 return Ok(());
878 }
879
880 app.db
881 .create_billing_subscription(&CreateBillingSubscriptionParams {
882 billing_customer_id: billing_customer.id,
883 kind: subscription_kind,
884 stripe_subscription_id: subscription.id.to_string(),
885 stripe_subscription_status: subscription.status.into(),
886 stripe_cancellation_reason: subscription
887 .cancellation_details
888 .and_then(|details| details.reason)
889 .map(|reason| reason.into()),
890 stripe_current_period_start: Some(subscription.current_period_start),
891 stripe_current_period_end: Some(subscription.current_period_end),
892 })
893 .await?;
894 }
895
896 // When the user's subscription changes, we want to refresh their LLM tokens
897 // to either grant/revoke access.
898 rpc_server
899 .refresh_llm_tokens_for_user(billing_customer.user_id)
900 .await;
901
902 Ok(())
903}
904
905#[derive(Debug, Deserialize)]
906struct GetMonthlySpendParams {
907 github_user_id: i32,
908}
909
910#[derive(Debug, Serialize)]
911struct GetMonthlySpendResponse {
912 monthly_free_tier_spend_in_cents: u32,
913 monthly_free_tier_allowance_in_cents: u32,
914 monthly_spend_in_cents: u32,
915}
916
917async fn get_monthly_spend(
918 Extension(app): Extension<Arc<AppState>>,
919 Query(params): Query<GetMonthlySpendParams>,
920) -> Result<Json<GetMonthlySpendResponse>> {
921 let user = app
922 .db
923 .get_user_by_github_user_id(params.github_user_id)
924 .await?
925 .ok_or_else(|| anyhow!("user not found"))?;
926
927 let Some(llm_db) = app.llm_db.clone() else {
928 return Err(Error::http(
929 StatusCode::NOT_IMPLEMENTED,
930 "LLM database not available".into(),
931 ));
932 };
933
934 let free_tier = user
935 .custom_llm_monthly_allowance_in_cents
936 .map(|allowance| Cents(allowance as u32))
937 .unwrap_or(FREE_TIER_MONTHLY_SPENDING_LIMIT);
938
939 let spending_for_month = llm_db
940 .get_user_spending_for_month(user.id, Utc::now())
941 .await?;
942
943 let free_tier_spend = Cents::min(spending_for_month, free_tier);
944 let monthly_spend = spending_for_month.saturating_sub(free_tier);
945
946 Ok(Json(GetMonthlySpendResponse {
947 monthly_free_tier_spend_in_cents: free_tier_spend.0,
948 monthly_free_tier_allowance_in_cents: free_tier.0,
949 monthly_spend_in_cents: monthly_spend.0,
950 }))
951}
952
953#[derive(Debug, Deserialize)]
954struct GetCurrentUsageParams {
955 github_user_id: i32,
956}
957
958#[derive(Debug, Serialize)]
959struct UsageCounts {
960 pub used: i32,
961 pub limit: Option<i32>,
962 pub remaining: Option<i32>,
963}
964
965#[derive(Debug, Serialize)]
966struct GetCurrentUsageResponse {
967 pub model_requests: UsageCounts,
968 pub edit_predictions: UsageCounts,
969}
970
971async fn get_current_usage(
972 Extension(app): Extension<Arc<AppState>>,
973 Query(params): Query<GetCurrentUsageParams>,
974) -> Result<Json<GetCurrentUsageResponse>> {
975 let user = app
976 .db
977 .get_user_by_github_user_id(params.github_user_id)
978 .await?
979 .ok_or_else(|| anyhow!("user not found"))?;
980
981 let Some(llm_db) = app.llm_db.clone() else {
982 return Err(Error::http(
983 StatusCode::NOT_IMPLEMENTED,
984 "LLM database not available".into(),
985 ));
986 };
987
988 let empty_usage = GetCurrentUsageResponse {
989 model_requests: UsageCounts {
990 used: 0,
991 limit: Some(0),
992 remaining: Some(0),
993 },
994 edit_predictions: UsageCounts {
995 used: 0,
996 limit: Some(0),
997 remaining: Some(0),
998 },
999 };
1000
1001 let Some(subscription) = app.db.get_active_billing_subscription(user.id).await? else {
1002 return Ok(Json(empty_usage));
1003 };
1004
1005 let subscription_period = maybe!({
1006 let period_start_at = subscription.current_period_start_at()?;
1007 let period_end_at = subscription.current_period_end_at()?;
1008
1009 Some((period_start_at, period_end_at))
1010 });
1011
1012 let Some((period_start_at, period_end_at)) = subscription_period else {
1013 return Ok(Json(empty_usage));
1014 };
1015
1016 let usage = llm_db
1017 .get_subscription_usage_for_period(user.id, period_start_at, period_end_at)
1018 .await?;
1019 let Some(usage) = usage else {
1020 return Ok(Json(empty_usage));
1021 };
1022
1023 let plan = match usage.plan {
1024 SubscriptionKind::ZedPro => zed_llm_client::Plan::ZedPro,
1025 SubscriptionKind::ZedProTrial => zed_llm_client::Plan::ZedProTrial,
1026 SubscriptionKind::ZedFree => zed_llm_client::Plan::Free,
1027 };
1028
1029 let model_requests_limit = match plan.model_requests_limit() {
1030 zed_llm_client::UsageLimit::Limited(limit) => Some(limit),
1031 zed_llm_client::UsageLimit::Unlimited => None,
1032 };
1033 let edit_prediction_limit = match plan.edit_predictions_limit() {
1034 zed_llm_client::UsageLimit::Limited(limit) => Some(limit),
1035 zed_llm_client::UsageLimit::Unlimited => None,
1036 };
1037
1038 Ok(Json(GetCurrentUsageResponse {
1039 model_requests: UsageCounts {
1040 used: usage.model_requests,
1041 limit: model_requests_limit,
1042 remaining: model_requests_limit.map(|limit| (limit - usage.model_requests).max(0)),
1043 },
1044 edit_predictions: UsageCounts {
1045 used: usage.edit_predictions,
1046 limit: edit_prediction_limit,
1047 remaining: edit_prediction_limit.map(|limit| (limit - usage.edit_predictions).max(0)),
1048 },
1049 }))
1050}
1051
1052impl From<SubscriptionStatus> for StripeSubscriptionStatus {
1053 fn from(value: SubscriptionStatus) -> Self {
1054 match value {
1055 SubscriptionStatus::Incomplete => Self::Incomplete,
1056 SubscriptionStatus::IncompleteExpired => Self::IncompleteExpired,
1057 SubscriptionStatus::Trialing => Self::Trialing,
1058 SubscriptionStatus::Active => Self::Active,
1059 SubscriptionStatus::PastDue => Self::PastDue,
1060 SubscriptionStatus::Canceled => Self::Canceled,
1061 SubscriptionStatus::Unpaid => Self::Unpaid,
1062 SubscriptionStatus::Paused => Self::Paused,
1063 }
1064 }
1065}
1066
1067impl From<CancellationDetailsReason> for StripeCancellationReason {
1068 fn from(value: CancellationDetailsReason) -> Self {
1069 match value {
1070 CancellationDetailsReason::CancellationRequested => Self::CancellationRequested,
1071 CancellationDetailsReason::PaymentDisputed => Self::PaymentDisputed,
1072 CancellationDetailsReason::PaymentFailed => Self::PaymentFailed,
1073 }
1074 }
1075}
1076
1077/// Finds or creates a billing customer using the provided customer.
1078async fn find_or_create_billing_customer(
1079 app: &Arc<AppState>,
1080 stripe_client: &stripe::Client,
1081 customer_or_id: Expandable<Customer>,
1082) -> anyhow::Result<Option<billing_customer::Model>> {
1083 let customer_id = match &customer_or_id {
1084 Expandable::Id(id) => id,
1085 Expandable::Object(customer) => customer.id.as_ref(),
1086 };
1087
1088 // If we already have a billing customer record associated with the Stripe customer,
1089 // there's nothing more we need to do.
1090 if let Some(billing_customer) = app
1091 .db
1092 .get_billing_customer_by_stripe_customer_id(customer_id)
1093 .await?
1094 {
1095 return Ok(Some(billing_customer));
1096 }
1097
1098 // If all we have is a customer ID, resolve it to a full customer record by
1099 // hitting the Stripe API.
1100 let customer = match customer_or_id {
1101 Expandable::Id(id) => Customer::retrieve(stripe_client, &id, &[]).await?,
1102 Expandable::Object(customer) => *customer,
1103 };
1104
1105 let Some(email) = customer.email else {
1106 return Ok(None);
1107 };
1108
1109 let Some(user) = app.db.get_user_by_email(&email).await? else {
1110 return Ok(None);
1111 };
1112
1113 let billing_customer = app
1114 .db
1115 .create_billing_customer(&CreateBillingCustomerParams {
1116 user_id: user.id,
1117 stripe_customer_id: customer.id.to_string(),
1118 })
1119 .await?;
1120
1121 Ok(Some(billing_customer))
1122}
1123
1124const SYNC_LLM_USAGE_WITH_STRIPE_INTERVAL: Duration = Duration::from_secs(60);
1125
1126pub fn sync_llm_usage_with_stripe_periodically(app: Arc<AppState>) {
1127 let Some(stripe_billing) = app.stripe_billing.clone() else {
1128 log::warn!("failed to retrieve Stripe billing object");
1129 return;
1130 };
1131 let Some(llm_db) = app.llm_db.clone() else {
1132 log::warn!("failed to retrieve LLM database");
1133 return;
1134 };
1135
1136 let executor = app.executor.clone();
1137 executor.spawn_detached({
1138 let executor = executor.clone();
1139 async move {
1140 loop {
1141 sync_with_stripe(&app, &llm_db, &stripe_billing)
1142 .await
1143 .context("failed to sync LLM usage to Stripe")
1144 .trace_err();
1145 executor.sleep(SYNC_LLM_USAGE_WITH_STRIPE_INTERVAL).await;
1146 }
1147 }
1148 });
1149}
1150
1151async fn sync_with_stripe(
1152 app: &Arc<AppState>,
1153 llm_db: &Arc<LlmDatabase>,
1154 stripe_billing: &Arc<StripeBilling>,
1155) -> anyhow::Result<()> {
1156 let events = llm_db.get_billing_events().await?;
1157 let user_ids = events
1158 .iter()
1159 .map(|(event, _)| event.user_id)
1160 .collect::<HashSet<UserId>>();
1161 let stripe_subscriptions = app.db.get_active_billing_subscriptions(user_ids).await?;
1162
1163 for (event, model) in events {
1164 let Some((stripe_db_customer, stripe_db_subscription)) =
1165 stripe_subscriptions.get(&event.user_id)
1166 else {
1167 tracing::warn!(
1168 user_id = event.user_id.0,
1169 "Registered billing event for user who is not a Stripe customer. Billing events should only be created for users who are Stripe customers, so this is a mistake on our side."
1170 );
1171 continue;
1172 };
1173 let stripe_subscription_id: stripe::SubscriptionId = stripe_db_subscription
1174 .stripe_subscription_id
1175 .parse()
1176 .context("failed to parse stripe subscription id from db")?;
1177 let stripe_customer_id: stripe::CustomerId = stripe_db_customer
1178 .stripe_customer_id
1179 .parse()
1180 .context("failed to parse stripe customer id from db")?;
1181
1182 let stripe_model = stripe_billing.register_model(&model).await?;
1183 stripe_billing
1184 .subscribe_to_model(&stripe_subscription_id, &stripe_model)
1185 .await?;
1186 stripe_billing
1187 .bill_model_usage(&stripe_customer_id, &stripe_model, &event)
1188 .await?;
1189 llm_db.consume_billing_event(event.id).await?;
1190 }
1191
1192 Ok(())
1193}