1use std::sync::Arc;
2
3use anyhow::{Context as _, anyhow};
4use chrono::Utc;
5use collections::HashMap;
6use stripe::SubscriptionStatus;
7use tokio::sync::RwLock;
8use uuid::Uuid;
9
10use crate::Result;
11use crate::db::billing_subscription::SubscriptionKind;
12use crate::llm::AGENT_EXTENDED_TRIAL_FEATURE_FLAG;
13use crate::stripe_client::{
14 RealStripeClient, StripeCheckoutSessionMode, StripeCheckoutSessionPaymentMethodCollection,
15 StripeClient, StripeCreateCheckoutSessionLineItems, StripeCreateCheckoutSessionParams,
16 StripeCreateCheckoutSessionSubscriptionData, StripeCreateMeterEventParams,
17 StripeCreateMeterEventPayload, StripeCustomerId, StripeMeter, StripePrice, StripePriceId,
18 StripeSubscription, StripeSubscriptionId, StripeSubscriptionTrialSettings,
19 StripeSubscriptionTrialSettingsEndBehavior,
20 StripeSubscriptionTrialSettingsEndBehaviorMissingPaymentMethod, UpdateSubscriptionItems,
21 UpdateSubscriptionParams,
22};
23
24pub struct StripeBilling {
25 state: RwLock<StripeBillingState>,
26 real_client: Arc<stripe::Client>,
27 client: Arc<dyn StripeClient>,
28}
29
30#[derive(Default)]
31struct StripeBillingState {
32 meters_by_event_name: HashMap<String, StripeMeter>,
33 price_ids_by_meter_id: HashMap<String, StripePriceId>,
34 prices_by_lookup_key: HashMap<String, StripePrice>,
35}
36
37impl StripeBilling {
38 pub fn new(client: Arc<stripe::Client>) -> Self {
39 Self {
40 client: Arc::new(RealStripeClient::new(client.clone())),
41 real_client: client,
42 state: RwLock::default(),
43 }
44 }
45
46 #[cfg(test)]
47 pub fn test(client: Arc<crate::stripe_client::FakeStripeClient>) -> Self {
48 Self {
49 // This is just temporary until we can remove all usages of the real Stripe client.
50 real_client: Arc::new(stripe::Client::new("sk_test")),
51 client,
52 state: RwLock::default(),
53 }
54 }
55
56 pub async fn initialize(&self) -> Result<()> {
57 log::info!("StripeBilling: initializing");
58
59 let mut state = self.state.write().await;
60
61 let (meters, prices) =
62 futures::try_join!(self.client.list_meters(), self.client.list_prices())?;
63
64 for meter in meters {
65 state
66 .meters_by_event_name
67 .insert(meter.event_name.clone(), meter);
68 }
69
70 for price in prices {
71 if let Some(lookup_key) = price.lookup_key.clone() {
72 state.prices_by_lookup_key.insert(lookup_key, price.clone());
73 }
74
75 if let Some(recurring) = price.recurring {
76 if let Some(meter) = recurring.meter {
77 state.price_ids_by_meter_id.insert(meter, price.id);
78 }
79 }
80 }
81
82 log::info!("StripeBilling: initialized");
83
84 Ok(())
85 }
86
87 pub async fn zed_pro_price_id(&self) -> Result<StripePriceId> {
88 self.find_price_id_by_lookup_key("zed-pro").await
89 }
90
91 pub async fn zed_free_price_id(&self) -> Result<StripePriceId> {
92 self.find_price_id_by_lookup_key("zed-free").await
93 }
94
95 pub async fn find_price_id_by_lookup_key(&self, lookup_key: &str) -> Result<StripePriceId> {
96 self.state
97 .read()
98 .await
99 .prices_by_lookup_key
100 .get(lookup_key)
101 .map(|price| price.id.clone())
102 .ok_or_else(|| crate::Error::Internal(anyhow!("no price ID found for {lookup_key:?}")))
103 }
104
105 pub async fn find_price_by_lookup_key(&self, lookup_key: &str) -> Result<StripePrice> {
106 self.state
107 .read()
108 .await
109 .prices_by_lookup_key
110 .get(lookup_key)
111 .cloned()
112 .ok_or_else(|| crate::Error::Internal(anyhow!("no price found for {lookup_key:?}")))
113 }
114
115 pub async fn determine_subscription_kind(
116 &self,
117 subscription: &stripe::Subscription,
118 ) -> Option<SubscriptionKind> {
119 let zed_pro_price_id: stripe::PriceId =
120 self.zed_pro_price_id().await.ok()?.try_into().ok()?;
121 let zed_free_price_id: stripe::PriceId =
122 self.zed_free_price_id().await.ok()?.try_into().ok()?;
123
124 subscription.items.data.iter().find_map(|item| {
125 let price = item.price.as_ref()?;
126
127 if price.id == zed_pro_price_id {
128 Some(if subscription.status == SubscriptionStatus::Trialing {
129 SubscriptionKind::ZedProTrial
130 } else {
131 SubscriptionKind::ZedPro
132 })
133 } else if price.id == zed_free_price_id {
134 Some(SubscriptionKind::ZedFree)
135 } else {
136 None
137 }
138 })
139 }
140
141 /// Returns the Stripe customer associated with the provided email address, or creates a new customer, if one does
142 /// not already exist.
143 ///
144 /// Always returns a new Stripe customer if the email address is `None`.
145 pub async fn find_or_create_customer_by_email(
146 &self,
147 email_address: Option<&str>,
148 ) -> Result<StripeCustomerId> {
149 let existing_customer = if let Some(email) = email_address {
150 let customers = self.client.list_customers_by_email(email).await?;
151
152 customers.first().cloned()
153 } else {
154 None
155 };
156
157 let customer_id = if let Some(existing_customer) = existing_customer {
158 existing_customer.id
159 } else {
160 let customer = self
161 .client
162 .create_customer(crate::stripe_client::CreateCustomerParams {
163 email: email_address,
164 })
165 .await?;
166
167 customer.id
168 };
169
170 Ok(customer_id)
171 }
172
173 pub async fn subscribe_to_price(
174 &self,
175 subscription_id: &StripeSubscriptionId,
176 price: &StripePrice,
177 ) -> Result<()> {
178 let subscription = self.client.get_subscription(subscription_id).await?;
179
180 if subscription_contains_price(&subscription, &price.id) {
181 return Ok(());
182 }
183
184 const BILLING_THRESHOLD_IN_CENTS: i64 = 20 * 100;
185
186 let price_per_unit = price.unit_amount.unwrap_or_default();
187 let _units_for_billing_threshold = BILLING_THRESHOLD_IN_CENTS / price_per_unit;
188
189 self.client
190 .update_subscription(
191 subscription_id,
192 UpdateSubscriptionParams {
193 items: Some(vec![UpdateSubscriptionItems {
194 price: Some(price.id.clone()),
195 }]),
196 trial_settings: Some(StripeSubscriptionTrialSettings {
197 end_behavior: StripeSubscriptionTrialSettingsEndBehavior {
198 missing_payment_method: StripeSubscriptionTrialSettingsEndBehaviorMissingPaymentMethod::Cancel
199 },
200 }),
201 },
202 )
203 .await?;
204
205 Ok(())
206 }
207
208 pub async fn bill_model_request_usage(
209 &self,
210 customer_id: &StripeCustomerId,
211 event_name: &str,
212 requests: i32,
213 ) -> Result<()> {
214 let timestamp = Utc::now().timestamp();
215 let idempotency_key = Uuid::new_v4();
216
217 self.client
218 .create_meter_event(StripeCreateMeterEventParams {
219 identifier: &format!("model_requests/{}", idempotency_key),
220 event_name,
221 payload: StripeCreateMeterEventPayload {
222 value: requests as u64,
223 stripe_customer_id: customer_id,
224 },
225 timestamp: Some(timestamp),
226 })
227 .await?;
228
229 Ok(())
230 }
231
232 pub async fn checkout_with_zed_pro(
233 &self,
234 customer_id: &StripeCustomerId,
235 github_login: &str,
236 success_url: &str,
237 ) -> Result<String> {
238 let zed_pro_price_id = self.zed_pro_price_id().await?;
239
240 let mut params = StripeCreateCheckoutSessionParams::default();
241 params.mode = Some(StripeCheckoutSessionMode::Subscription);
242 params.customer = Some(customer_id);
243 params.client_reference_id = Some(github_login);
244 params.line_items = Some(vec![StripeCreateCheckoutSessionLineItems {
245 price: Some(zed_pro_price_id.to_string()),
246 quantity: Some(1),
247 }]);
248 params.success_url = Some(success_url);
249
250 let session = self.client.create_checkout_session(params).await?;
251 Ok(session.url.context("no checkout session URL")?)
252 }
253
254 pub async fn checkout_with_zed_pro_trial(
255 &self,
256 customer_id: &StripeCustomerId,
257 github_login: &str,
258 feature_flags: Vec<String>,
259 success_url: &str,
260 ) -> Result<String> {
261 let zed_pro_price_id = self.zed_pro_price_id().await?;
262
263 let eligible_for_extended_trial = feature_flags
264 .iter()
265 .any(|flag| flag == AGENT_EXTENDED_TRIAL_FEATURE_FLAG);
266
267 let trial_period_days = if eligible_for_extended_trial { 60 } else { 14 };
268
269 let mut subscription_metadata = std::collections::HashMap::new();
270 if eligible_for_extended_trial {
271 subscription_metadata.insert(
272 "promo_feature_flag".to_string(),
273 AGENT_EXTENDED_TRIAL_FEATURE_FLAG.to_string(),
274 );
275 }
276
277 let mut params = StripeCreateCheckoutSessionParams::default();
278 params.subscription_data = Some(StripeCreateCheckoutSessionSubscriptionData {
279 trial_period_days: Some(trial_period_days),
280 trial_settings: Some(StripeSubscriptionTrialSettings {
281 end_behavior: StripeSubscriptionTrialSettingsEndBehavior {
282 missing_payment_method:
283 StripeSubscriptionTrialSettingsEndBehaviorMissingPaymentMethod::Cancel,
284 },
285 }),
286 metadata: if !subscription_metadata.is_empty() {
287 Some(subscription_metadata)
288 } else {
289 None
290 },
291 });
292 params.mode = Some(StripeCheckoutSessionMode::Subscription);
293 params.payment_method_collection =
294 Some(StripeCheckoutSessionPaymentMethodCollection::IfRequired);
295 params.customer = Some(customer_id);
296 params.client_reference_id = Some(github_login);
297 params.line_items = Some(vec![StripeCreateCheckoutSessionLineItems {
298 price: Some(zed_pro_price_id.to_string()),
299 quantity: Some(1),
300 }]);
301 params.success_url = Some(success_url);
302
303 let session = self.client.create_checkout_session(params).await?;
304 Ok(session.url.context("no checkout session URL")?)
305 }
306
307 pub async fn subscribe_to_zed_free(
308 &self,
309 customer_id: stripe::CustomerId,
310 ) -> Result<stripe::Subscription> {
311 let zed_free_price_id = self.zed_free_price_id().await?;
312
313 let existing_subscriptions = stripe::Subscription::list(
314 &self.real_client,
315 &stripe::ListSubscriptions {
316 customer: Some(customer_id.clone()),
317 status: None,
318 ..Default::default()
319 },
320 )
321 .await?;
322
323 let existing_active_subscription =
324 existing_subscriptions
325 .data
326 .into_iter()
327 .find(|subscription| {
328 subscription.status == SubscriptionStatus::Active
329 || subscription.status == SubscriptionStatus::Trialing
330 });
331 if let Some(subscription) = existing_active_subscription {
332 return Ok(subscription);
333 }
334
335 let mut params = stripe::CreateSubscription::new(customer_id);
336 params.items = Some(vec![stripe::CreateSubscriptionItems {
337 price: Some(zed_free_price_id.to_string()),
338 quantity: Some(1),
339 ..Default::default()
340 }]);
341
342 let subscription = stripe::Subscription::create(&self.real_client, params).await?;
343
344 Ok(subscription)
345 }
346}
347
348fn subscription_contains_price(
349 subscription: &StripeSubscription,
350 price_id: &StripePriceId,
351) -> bool {
352 subscription.items.iter().any(|item| {
353 item.price
354 .as_ref()
355 .map_or(false, |price| price.id == *price_id)
356 })
357}