| 1 | //! The card processor, behind the calls billing needs: start a payment |
| 2 | //! page, save and verify a card, ask whether a payment was made, and start, |
| 3 | //! read or end the monthly plan. Stripe speaks form-encoded requests and |
| 4 | //! JSON answers. |
| 5 | //! |
| 6 | //! Every Stripe object billing needs beyond customers and their payments |
| 7 | //! (the plan's product, the billing page's settings) is made the first time |
| 8 | //! it is needed, and found again by its `metadata[g1t]` after that. |
| 9 | //! |
| 10 | //! Every request names the API version it is written for |
| 11 | //! (`STRIPE_VERSION`). Without it Stripe answers at the account's default, |
| 12 | //! which for an account made today is a newer version than this code reads: |
| 13 | //! invoices no longer carry `subscription`, charges no longer carry |
| 14 | //! `invoice`, and parameters this code sends can be refused. A failure is |
| 15 | //! never shown raw: `friendly` turns it into a sentence for the page. |
| 16 | |
| 17 | use serde::Deserialize; |
| 18 | use worker::{Error, Fetch, Headers, Method, Request, RequestInit, Result}; |
| 19 | |
| 20 | const API: &str = "https://api.stripe.com/v1"; |
| 21 | |
| 22 | /// The Stripe API version billing is written against. Changing it is a |
| 23 | /// code change: read Stripe's upgrade notes for every field billing reads. |
| 24 | pub(crate) const STRIPE_VERSION: &str = "2025-02-24.acacia"; |
| 25 | |
| 26 | /// Stripe Tax's code for what g1t sells, on every product, price and |
| 27 | /// invoice line: software as a service, for business use. |
| 28 | pub(crate) const TAX_CODE: &str = "txcd_10103001"; |
| 29 | |
| 30 | /// What every payment page (payment or subscription mode) asks of Stripe |
| 31 | /// Tax: tax worked out on top of the price shown, from a billing address |
| 32 | /// it always collects, with the buyer's tax ID if they have one. With a |
| 33 | /// customer already, what was entered is saved on it, so invoices and |
| 34 | /// off-session charges later find the address too. Checkout refuses |
| 35 | /// `automatic_tax` for a customer with no address unless it may save one |
| 36 | /// (`customer_update[address]`), and `tax_id_collection` unless it may save |
| 37 | /// the name (`customer_update[name]`). |
| 38 | pub(crate) fn checkout_tax_fields(customer: Option<&str>) -> Vec<(&'static str, String)> { |
| 39 | let mut fields = vec![ |
| 40 | ("automatic_tax[enabled]", "true".to_owned()), |
| 41 | ("billing_address_collection", "required".to_owned()), |
| 42 | ("tax_id_collection[enabled]", "true".to_owned()), |
| 43 | ]; |
| 44 | if customer.is_some() { |
| 45 | fields.extend([("customer_update[address]", "auto".to_owned()), ("customer_update[name]", "auto".to_owned())]); |
| 46 | } |
| 47 | fields |
| 48 | } |
| 49 | |
| 50 | /// Whether Stripe refused because it could not tell where the customer is |
| 51 | /// for tax: no address, or not enough of one. |
| 52 | pub(crate) fn is_tax_location_error(error: &Error) -> bool { |
| 53 | let text = error.to_string(); |
| 54 | text.contains("customer_tax_location_invalid") || text.contains("requires_location_inputs") |
| 55 | } |
| 56 | |
| 57 | /// Whether an address is enough for Stripe Tax to place the customer: a |
| 58 | /// country, and in the United States a postal code (in Canada a postal |
| 59 | /// code or a province). |
| 60 | pub(crate) fn address_places_customer(address: &serde_json::Value) -> bool { |
| 61 | let text = |key: &str| address[key].as_str().map(str::trim).unwrap_or_default().to_owned(); |
| 62 | match text("country").to_uppercase().as_str() { |
| 63 | "" => false, |
| 64 | "US" => !text("postal_code").is_empty(), |
| 65 | "CA" => !text("postal_code").is_empty() || !text("state").is_empty(), |
| 66 | _ => true, |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | /// What a Stripe failure says, for the person on the page: Stripe's own |
| 71 | /// message when it gave one (never the request or any key), else that it |
| 72 | /// could not be reached. |
| 73 | pub(crate) fn friendly(error: &Error) -> String { |
| 74 | let text = error.to_string(); |
| 75 | let message = text |
| 76 | .split_once(": ") |
| 77 | .and_then(|(_, body)| serde_json::from_str::<serde_json::Value>(body).ok()) |
| 78 | .and_then(|body| body["error"]["message"].as_str().map(str::to_owned)); |
| 79 | match message { |
| 80 | Some(message) => format!("Stripe refused it: {}", message.trim_end_matches('.').to_owned() + "."), |
| 81 | None if text.contains("the card processor answered") => "Stripe refused it. Try again in a minute; if it keeps happening, write to support@g1t.sh.".to_owned(), |
| 82 | None => "Stripe could not be reached. Try again in a minute.".to_owned(), |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | pub struct Stripe { |
| 87 | key: String, |
| 88 | } |
| 89 | |
| 90 | /// A payment page, and the payment made through it. |
| 91 | #[derive(Deserialize)] |
| 92 | pub struct Session { |
| 93 | pub id: String, |
| 94 | /// Where to send the person. Absent once the page has been used. |
| 95 | pub url: Option<String>, |
| 96 | /// `paid` once the money has been taken. |
| 97 | pub payment_status: String, |
| 98 | /// What was paid, in cents, tax included. |
| 99 | pub amount_total: Option<u32>, |
| 100 | /// What the lines came to before tax, in cents. |
| 101 | #[serde(default)] |
| 102 | pub amount_subtotal: Option<u32>, |
| 103 | /// The tax Stripe added (`amount_tax`), among other totals. |
| 104 | #[serde(default)] |
| 105 | pub total_details: Option<TotalDetails>, |
| 106 | /// For a payment page: the payment that took the money. |
| 107 | #[serde(default)] |
| 108 | pub payment_intent: Option<String>, |
| 109 | pub customer: Option<String>, |
| 110 | /// For a plan's page: the subscription it started. |
| 111 | #[serde(default)] |
| 112 | pub subscription: Option<String>, |
| 113 | /// For a card check's page: the setup that saved and verified the card. |
| 114 | #[serde(default)] |
| 115 | pub setup_intent: Option<String>, |
| 116 | } |
| 117 | |
| 118 | #[derive(Default, Deserialize)] |
| 119 | pub struct TotalDetails { |
| 120 | #[serde(default)] |
| 121 | pub amount_tax: i64, |
| 122 | } |
| 123 | |
| 124 | impl Session { |
| 125 | /// The tax Stripe added on the page, in cents. |
| 126 | pub fn tax_cents(&self) -> i64 { |
| 127 | self.total_details.as_ref().map_or(0, |t| t.amount_tax.max(0)) |
| 128 | } |
| 129 | |
| 130 | /// What the page's lines came to before tax, in cents: the total less |
| 131 | /// the tax when Stripe gives no subtotal. |
| 132 | pub fn before_tax_cents(&self) -> i64 { |
| 133 | match self.amount_subtotal { |
| 134 | Some(subtotal) => i64::from(subtotal), |
| 135 | None => (i64::from(self.amount_total.unwrap_or(0)) - self.tax_cents()).max(0), |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /// A card saved and verified: what a card check found. |
| 141 | #[derive(Debug, Deserialize)] |
| 142 | pub struct CheckedCard { |
| 143 | pub payment_method: String, |
| 144 | pub fingerprint: Option<String>, |
| 145 | pub brand: Option<String>, |
| 146 | pub last4: Option<String>, |
| 147 | /// `credit`, `debit`, `prepaid` or `unknown`. |
| 148 | pub funding: Option<String>, |
| 149 | pub country: Option<String>, |
| 150 | /// The billing address entered with the card, as Stripe keeps it. |
| 151 | #[serde(default)] |
| 152 | pub address: Option<serde_json::Value>, |
| 153 | } |
| 154 | |
| 155 | /// g1t's settings for Stripe's hosted billing page. |
| 156 | #[derive(Debug, Deserialize)] |
| 157 | pub struct PortalConfiguration { |
| 158 | pub id: String, |
| 159 | #[serde(default)] |
| 160 | pub active: bool, |
| 161 | #[serde(default)] |
| 162 | pub login_page: Option<LoginPage>, |
| 163 | #[serde(default)] |
| 164 | pub metadata: Option<std::collections::HashMap<String, String>>, |
| 165 | } |
| 166 | |
| 167 | #[derive(Debug, Deserialize)] |
| 168 | pub struct LoginPage { |
| 169 | pub url: Option<String>, |
| 170 | } |
| 171 | |
| 172 | /// A monthly plan. |
| 173 | #[derive(Deserialize)] |
| 174 | pub struct StripeSubscription { |
| 175 | pub id: String, |
| 176 | /// `active`, `trialing`, `past_due`, `unpaid`, `canceled`, `incomplete`… |
| 177 | pub status: String, |
| 178 | #[serde(default)] |
| 179 | pub cancel_at_period_end: bool, |
| 180 | /// Unix seconds. Older API versions carry it here… |
| 181 | #[serde(default)] |
| 182 | pub current_period_end: Option<i64>, |
| 183 | /// …newer ones on each item. |
| 184 | #[serde(default)] |
| 185 | pub items: Option<Items>, |
| 186 | } |
| 187 | |
| 188 | #[derive(Deserialize)] |
| 189 | pub struct Items { |
| 190 | pub data: Vec<Item>, |
| 191 | } |
| 192 | |
| 193 | #[derive(Deserialize)] |
| 194 | pub struct Item { |
| 195 | #[serde(default)] |
| 196 | pub current_period_end: Option<i64>, |
| 197 | } |
| 198 | |
| 199 | impl StripeSubscription { |
| 200 | /// When the period paid for ends, in Unix seconds. |
| 201 | pub fn period_end(&self) -> Option<i64> { |
| 202 | self.current_period_end.or_else(|| { |
| 203 | self.items |
| 204 | .as_ref() |
| 205 | .and_then(|items| items.data.iter().filter_map(|item| item.current_period_end).max()) |
| 206 | }) |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | /// Percent-encodes a form value. |
| 211 | fn encode(value: &str) -> String { |
| 212 | let mut encoded = String::with_capacity(value.len()); |
| 213 | for byte in value.bytes() { |
| 214 | match byte { |
| 215 | b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9' | b'-' | b'_' | b'.' | b'~' => { |
| 216 | encoded.push(byte as char); |
| 217 | } |
| 218 | _ => encoded.push_str(&format!("%{byte:02X}")), |
| 219 | } |
| 220 | } |
| 221 | encoded |
| 222 | } |
| 223 | |
| 224 | /// `name=value` pairs as a form body. |
| 225 | /// Requests that carry `automatic_tax`: payment pages, invoices and |
| 226 | /// subscriptions. When Stripe Tax is not active for the key's mode (a test |
| 227 | /// account where it was never turned on), Stripe refuses them outright, so |
| 228 | /// in test mode the field is left out and the payment goes through untaxed; |
| 229 | /// with a live key the request is refused instead (`untaxed_body`). |
| 230 | pub(crate) fn taxed_path(path: &str) -> bool { |
| 231 | path == "/checkout/sessions" || path == "/invoices" || path == "/subscriptions" |
| 232 | } |
| 233 | |
| 234 | /// A form body without its `automatic_tax[…]` fields. |
| 235 | pub(crate) fn without_automatic_tax(body: &str) -> String { |
| 236 | body.split('&').filter(|pair| !pair.starts_with("automatic_tax")).collect::<Vec<_>>().join("&") |
| 237 | } |
| 238 | |
| 239 | /// What a request asking for tax becomes when Stripe Tax is not active. |
| 240 | /// In test mode, the body without `automatic_tax`: the payment goes through |
| 241 | /// untaxed. With a live key, nothing is sent: charging real money without |
| 242 | /// the tax owed on it would under-collect, so the charge, page or invoice |
| 243 | /// is refused, loudly, until Stripe Tax is turned on. |
| 244 | pub(crate) fn untaxed_body(live: bool, body: &str) -> Result<String> { |
| 245 | if live { |
| 246 | return Err(Error::RustError(format!( |
| 247 | "the card processor answered 400: {}", |
| 248 | serde_json::json!({ "error": { "type": "g1t_tax_not_active", "message": "Payments are paused while g1t sets up sales tax. Try again later" } }) |
| 249 | ))); |
| 250 | } |
| 251 | Ok(without_automatic_tax(body)) |
| 252 | } |
| 253 | |
| 254 | /// How long whether Stripe Tax is active is believed, in milliseconds. |
| 255 | const TAX_ACTIVE_FOR_MS: u64 = 10 * 60 * 1000; |
| 256 | |
| 257 | thread_local! { |
| 258 | /// Whether Stripe Tax is active for the key, and when that was read. |
| 259 | static TAX_ACTIVE: std::cell::Cell<Option<(bool, u64)>> = const { std::cell::Cell::new(None) }; |
| 260 | /// When g1t's portal configuration was last brought in line with |
| 261 | /// `portal_fields` in this isolate. |
| 262 | static PORTAL_SYNCED: std::cell::Cell<Option<u64>> = const { std::cell::Cell::new(None) }; |
| 263 | } |
| 264 | |
| 265 | /// How long a portal configuration brought in line is taken to stay so. |
| 266 | const PORTAL_SYNCED_FOR_MS: u64 = 60 * 60 * 1000; |
| 267 | |
| 268 | /// The `metadata[g1t]` of the portal configuration billing makes. |
| 269 | pub(crate) const PORTAL_TAG: &str = "billing"; |
| 270 | |
| 271 | /// Why a customer can end a plan on Stripe's page: Stripe asks for the |
| 272 | /// list whenever it asks for a reason. |
| 273 | const CANCELLATION_REASONS: [&str; 8] = |
| 274 | ["too_expensive", "missing_features", "switched_service", "unused", "customer_service", "too_complex", "low_quality", "other"]; |
| 275 | |
| 276 | /// g1t's settings for Stripe's hosted billing page (the customer portal), |
| 277 | /// where every card, billing detail, tax ID, invoice and receipt is |
| 278 | /// managed, and the plan ended: the customer's details (email, address, |
| 279 | /// name, tax IDs, phone), the card, the invoice history, and ending the |
| 280 | /// plan at the end of the period with a reason. Never changing the plan |
| 281 | /// there: g1t has one. |
| 282 | pub(crate) fn portal_fields() -> Vec<(&'static str, String)> { |
| 283 | let mut fields = vec![ |
| 284 | ("business_profile[headline]", "g1t billing: your card, billing details, tax IDs and invoices".to_owned()), |
| 285 | ("business_profile[privacy_policy_url]", "https://g1t.sh/policies/privacy".to_owned()), |
| 286 | ("business_profile[terms_of_service_url]", "https://g1t.sh/policies/terms".to_owned()), |
| 287 | ("features[customer_update][enabled]", "true".to_owned()), |
| 288 | ("features[customer_update][allowed_updates][0]", "email".to_owned()), |
| 289 | ("features[customer_update][allowed_updates][1]", "address".to_owned()), |
| 290 | ("features[customer_update][allowed_updates][2]", "name".to_owned()), |
| 291 | ("features[customer_update][allowed_updates][3]", "tax_id".to_owned()), |
| 292 | ("features[customer_update][allowed_updates][4]", "phone".to_owned()), |
| 293 | ("features[payment_method_update][enabled]", "true".to_owned()), |
| 294 | ("features[invoice_history][enabled]", "true".to_owned()), |
| 295 | ("features[subscription_cancel][enabled]", "true".to_owned()), |
| 296 | ("features[subscription_cancel][mode]", "at_period_end".to_owned()), |
| 297 | ("features[subscription_cancel][cancellation_reason][enabled]", "true".to_owned()), |
| 298 | ("features[subscription_update][enabled]", "false".to_owned()), |
| 299 | ("login_page[enabled]", "true".to_owned()), |
| 300 | ("metadata[g1t]", PORTAL_TAG.to_owned()), |
| 301 | ]; |
| 302 | const OPTION_KEYS: [&str; 8] = [ |
| 303 | "features[subscription_cancel][cancellation_reason][options][0]", |
| 304 | "features[subscription_cancel][cancellation_reason][options][1]", |
| 305 | "features[subscription_cancel][cancellation_reason][options][2]", |
| 306 | "features[subscription_cancel][cancellation_reason][options][3]", |
| 307 | "features[subscription_cancel][cancellation_reason][options][4]", |
| 308 | "features[subscription_cancel][cancellation_reason][options][5]", |
| 309 | "features[subscription_cancel][cancellation_reason][options][6]", |
| 310 | "features[subscription_cancel][cancellation_reason][options][7]", |
| 311 | ]; |
| 312 | fields.extend(OPTION_KEYS.iter().zip(CANCELLATION_REASONS).map(|(key, reason)| (*key, reason.to_owned()))); |
| 313 | fields |
| 314 | } |
| 315 | |
| 316 | /// g1t's portal configuration among Stripe's, by its tag: an active one |
| 317 | /// first. |
| 318 | pub(crate) fn ours(configurations: Vec<PortalConfiguration>) -> Option<PortalConfiguration> { |
| 319 | let mut tagged: Vec<PortalConfiguration> = configurations |
| 320 | .into_iter() |
| 321 | .filter(|c| c.metadata.as_ref().and_then(|m| m.get("g1t")).map(String::as_str) == Some(PORTAL_TAG)) |
| 322 | .collect(); |
| 323 | tagged.sort_by_key(|c| !c.active); |
| 324 | tagged.into_iter().next() |
| 325 | } |
| 326 | |
| 327 | /// Stripe Tax's settings, for the go-live checklist: `active` once it can |
| 328 | /// collect tax, else `pending` with what is missing (`head_office`, …). |
| 329 | #[derive(Debug, Default, Deserialize)] |
| 330 | pub struct TaxSettings { |
| 331 | #[serde(default)] |
| 332 | pub status: String, |
| 333 | #[serde(default)] |
| 334 | pub status_details: TaxStatusDetails, |
| 335 | } |
| 336 | |
| 337 | #[derive(Debug, Default, Deserialize)] |
| 338 | pub struct TaxStatusDetails { |
| 339 | #[serde(default)] |
| 340 | pub pending: Option<TaxPending>, |
| 341 | } |
| 342 | |
| 343 | #[derive(Debug, Default, Deserialize)] |
| 344 | pub struct TaxPending { |
| 345 | #[serde(default)] |
| 346 | pub missing_fields: Option<Vec<String>>, |
| 347 | } |
| 348 | |
| 349 | pub(crate) fn form(fields: &[(&str, String)]) -> String { |
| 350 | fields |
| 351 | .iter() |
| 352 | .map(|(name, value)| format!("{}={}", encode(name), encode(value))) |
| 353 | .collect::<Vec<_>>() |
| 354 | .join("&") |
| 355 | } |
| 356 | |
| 357 | /// The idempotency key for starting a plan on a saved card: the same |
| 358 | /// workspace, plan and card within the same ten minutes is one subscription, |
| 359 | /// however many times it is asked for (a double click, two tabs), so a |
| 360 | /// workspace is never billed twice for one plan. A different card is a new |
| 361 | /// attempt, as Stripe refuses a key reused with other fields. |
| 362 | pub(crate) fn plan_key(workspace: &str, feature: &str, payment_method: &str, now_ms: u64) -> String { |
| 363 | format!("plan/{workspace}/{feature}/{payment_method}/{}", now_ms / 600_000) |
| 364 | } |
| 365 | |
| 366 | impl Stripe { |
| 367 | pub fn new(key: String) -> Self { |
| 368 | Stripe { key } |
| 369 | } |
| 370 | |
| 371 | /// Whether the key is for real cards, not Stripe's test mode. |
| 372 | pub fn live(&self) -> bool { |
| 373 | is_live(&self.key) |
| 374 | } |
| 375 | |
| 376 | /// A GET of any Stripe resource, for the webhook handlers. |
| 377 | pub(crate) async fn get<T: for<'a> Deserialize<'a>>(&self, path: &str) -> Result<T> { |
| 378 | self.call(Method::Get, path, None).await |
| 379 | } |
| 380 | |
| 381 | /// A DELETE of any Stripe resource. |
| 382 | pub(crate) async fn delete<T: for<'a> Deserialize<'a>>(&self, path: &str) -> Result<T> { |
| 383 | self.call(Method::Delete, path, None).await |
| 384 | } |
| 385 | |
| 386 | /// A form POST to any Stripe resource. |
| 387 | pub(crate) async fn post<T: for<'a> Deserialize<'a>>(&self, path: &str, fields: &[(&str, String)]) -> Result<T> { |
| 388 | self.call(Method::Post, path, Some(form(fields))).await |
| 389 | } |
| 390 | |
| 391 | /// A form POST that Stripe does at most once for `key`, however often |
| 392 | /// it is sent. |
| 393 | pub(crate) async fn post_idempotent<T: for<'a> Deserialize<'a>>( |
| 394 | &self, |
| 395 | path: &str, |
| 396 | fields: &[(&str, String)], |
| 397 | key: &str, |
| 398 | ) -> Result<T> { |
| 399 | self.send(Method::Post, path, Some(form(fields)), Some(key)).await |
| 400 | } |
| 401 | |
| 402 | async fn call<T: for<'a> Deserialize<'a>>( |
| 403 | &self, |
| 404 | method: Method, |
| 405 | path: &str, |
| 406 | body: Option<String>, |
| 407 | ) -> Result<T> { |
| 408 | self.send(method, path, body, None).await |
| 409 | } |
| 410 | |
| 411 | async fn send<T: for<'a> Deserialize<'a>>( |
| 412 | &self, |
| 413 | method: Method, |
| 414 | path: &str, |
| 415 | body: Option<String>, |
| 416 | idempotency_key: Option<&str>, |
| 417 | ) -> Result<T> { |
| 418 | let body = match body { |
| 419 | Some(body) if matches!(method, Method::Post) && taxed_path(path) && body.contains("automatic_tax") && !self.tax_active().await => { |
| 420 | if self.live() { |
| 421 | worker::console_error!( |
| 422 | "STRIPE TAX IS NOT ACTIVE for the live key: refused {path} rather than charge without tax. Turn it on in Stripe (Tax → Settings)." |
| 423 | ); |
| 424 | } |
| 425 | Some(untaxed_body(self.live(), &body)?) |
| 426 | } |
| 427 | body => body, |
| 428 | }; |
| 429 | self.send_raw(method, path, body, idempotency_key).await |
| 430 | } |
| 431 | |
| 432 | /// The request itself, as given: `send` without the Stripe Tax check. |
| 433 | async fn send_raw<T: for<'a> Deserialize<'a>>( |
| 434 | &self, |
| 435 | method: Method, |
| 436 | path: &str, |
| 437 | body: Option<String>, |
| 438 | idempotency_key: Option<&str>, |
| 439 | ) -> Result<T> { |
| 440 | let headers = Headers::new(); |
| 441 | headers.set("authorization", &format!("Bearer {}", self.key))?; |
| 442 | headers.set("stripe-version", STRIPE_VERSION)?; |
| 443 | if let Some(key) = idempotency_key { |
| 444 | headers.set("idempotency-key", key)?; |
| 445 | } |
| 446 | if body.is_some() { |
| 447 | headers.set("content-type", "application/x-www-form-urlencoded")?; |
| 448 | } |
| 449 | let deleting = matches!(method, Method::Delete); |
| 450 | let mut init = RequestInit::new(); |
| 451 | init.with_method(method).with_headers(headers); |
| 452 | if let Some(body) = body { |
| 453 | init.with_body(Some(body.into())); |
| 454 | } |
| 455 | let request = Request::new_with_init(&format!("{API}{path}"), &init)?; |
| 456 | let mut response = Fetch::Request(request).send().await?; |
| 457 | if response.status_code() != 200 { |
| 458 | return Err(Error::RustError(format!( |
| 459 | "the card processor answered {}: {}", |
| 460 | response.status_code(), |
| 461 | response.text().await.unwrap_or_default() |
| 462 | ))); |
| 463 | } |
| 464 | let found: serde_json::Value = response.json().await?; |
| 465 | // A deleted customer is read back with a 200 and `deleted: true`: |
| 466 | // as good as missing, so every caller that forgets a missing |
| 467 | // customer forgets this one too. |
| 468 | if !deleting && is_deleted_customer(&found) { |
| 469 | return Err(Error::RustError(DELETED_CUSTOMER.to_owned())); |
| 470 | } |
| 471 | serde_json::from_value(found).map_err(|error| Error::RustError(format!("the card processor's answer to {path} was unexpected: {error}"))) |
| 472 | } |
| 473 | |
| 474 | /// Whether Stripe Tax is active for this key's mode (`GET /tax/settings`, |
| 475 | /// `status` `active`), read at most every ten minutes. When it cannot be |
| 476 | /// read, it is taken as active: asking for tax and being refused says |
| 477 | /// why, where leaving it out would undercharge without a word. |
| 478 | pub async fn tax_active(&self) -> bool { |
| 479 | let now = crate::now_ms(); |
| 480 | if let Some((active, at)) = TAX_ACTIVE.with(|cell| cell.get()) |
| 481 | && now.saturating_sub(at) < TAX_ACTIVE_FOR_MS |
| 482 | { |
| 483 | return active; |
| 484 | } |
| 485 | #[derive(Deserialize)] |
| 486 | struct Settings { |
| 487 | status: String, |
| 488 | } |
| 489 | let active = match self.send_raw::<Settings>(Method::Get, "/tax/settings", None, None).await { |
| 490 | Ok(settings) => settings.status == "active", |
| 491 | Err(error) => { |
| 492 | worker::console_error!("Stripe Tax settings could not be read; asking for tax anyway: {error}"); |
| 493 | true |
| 494 | } |
| 495 | }; |
| 496 | TAX_ACTIVE.with(|cell| cell.set(Some((active, now)))); |
| 497 | active |
| 498 | } |
| 499 | |
| 500 | /// A customer for a workspace that has none yet, with the email its |
| 501 | /// receipts go to and the billing page signs in with. Two asking at once |
| 502 | /// make one customer (`customer_key`). |
| 503 | pub async fn create_customer(&self, workspace: &str, email: Option<&str>) -> Result<String> { |
| 504 | #[derive(Deserialize)] |
| 505 | struct Customer { |
| 506 | id: String, |
| 507 | } |
| 508 | let fields = customer_fields(workspace, email); |
| 509 | let key = customer_key(workspace, email, g1t_kit::now_ms()); |
| 510 | let customer: Customer = self.send(Method::Post, "/customers", Some(form(&fields)), Some(&key)).await?; |
| 511 | Ok(customer.id) |
| 512 | } |
| 513 | |
| 514 | /// A session on Stripe's hosted billing page (the customer portal) for |
| 515 | /// the customer, coming back to `return_url`. |
| 516 | pub async fn portal_session(&self, customer: &str, return_url: &str) -> Result<String> { |
| 517 | #[derive(Deserialize)] |
| 518 | struct Portal { |
| 519 | url: String, |
| 520 | } |
| 521 | let configuration = self.portal_configuration().await?; |
| 522 | let fields = [ |
| 523 | ("customer", customer.to_owned()), |
| 524 | ("return_url", return_url.to_owned()), |
| 525 | ("configuration", configuration.id), |
| 526 | ]; |
| 527 | let portal: Portal = self.call(Method::Post, "/billing_portal/sessions", Some(form(&fields))).await?; |
| 528 | Ok(portal.url) |
| 529 | } |
| 530 | |
| 531 | /// g1t's billing page settings at Stripe (`portal_fields`), made the |
| 532 | /// first time they are needed, and an existing one (`metadata[g1t]` = |
| 533 | /// `billing`) brought in line with them rather than a second made: at |
| 534 | /// most once an hour in an isolate. |
| 535 | pub async fn portal_configuration(&self) -> Result<PortalConfiguration> { |
| 536 | let now = crate::now_ms(); |
| 537 | let existing = self.our_portal().await?; |
| 538 | let fresh = PORTAL_SYNCED.with(|cell| cell.get()).is_some_and(|at| now.saturating_sub(at) < PORTAL_SYNCED_FOR_MS); |
| 539 | let configuration: PortalConfiguration = match existing { |
| 540 | Some(existing) if fresh && existing.active => existing, |
| 541 | Some(existing) => { |
| 542 | let mut fields = portal_fields(); |
| 543 | fields.push(("active", "true".to_owned())); |
| 544 | self.call(Method::Post, &format!("/billing_portal/configurations/{}", encode(&existing.id)), Some(form(&fields))).await? |
| 545 | } |
| 546 | None => self.call(Method::Post, "/billing_portal/configurations", Some(form(&portal_fields()))).await?, |
| 547 | }; |
| 548 | PORTAL_SYNCED.with(|cell| cell.set(Some(now))); |
| 549 | Ok(configuration) |
| 550 | } |
| 551 | |
| 552 | /// g1t's portal configuration as Stripe has it, without making or |
| 553 | /// changing it. None when there is none yet. |
| 554 | pub async fn our_portal(&self) -> Result<Option<PortalConfiguration>> { |
| 555 | #[derive(Deserialize)] |
| 556 | struct List { |
| 557 | data: Vec<PortalConfiguration>, |
| 558 | } |
| 559 | let list: List = self.call(Method::Get, "/billing_portal/configurations?limit=100", None).await?; |
| 560 | Ok(ours(list.data)) |
| 561 | } |
| 562 | |
| 563 | /// Stripe Tax's settings for this key's mode, read now. |
| 564 | pub async fn tax_settings(&self) -> Result<TaxSettings> { |
| 565 | self.send_raw(Method::Get, "/tax/settings", None, None).await |
| 566 | } |
| 567 | |
| 568 | /// The customer's email at Stripe, if they gave one. |
| 569 | pub async fn customer_email(&self, customer: &str) -> Result<Option<String>> { |
| 570 | #[derive(Deserialize)] |
| 571 | struct Customer { |
| 572 | email: Option<String>, |
| 573 | } |
| 574 | let found: Customer = self.call(Method::Get, &format!("/customers/{}", encode(customer)), None).await?; |
| 575 | Ok(found.email) |
| 576 | } |
| 577 | |
| 578 | /// Starts a page on which `amount_cents` is paid in advance: by card, |
| 579 | /// with 3-D Secure asked for wherever the card supports it, the card |
| 580 | /// kept for later charges; or, with `bank_transfer` and a customer, by |
| 581 | /// bank transfer to the account details Stripe gives, counted when the |
| 582 | /// money arrives. |
| 583 | pub async fn start_checkout( |
| 584 | &self, |
| 585 | workspace: &str, |
| 586 | amount_cents: u32, |
| 587 | customer: Option<&str>, |
| 588 | return_url: &str, |
| 589 | bank_transfer: bool, |
| 590 | ) -> Result<Session> { |
| 591 | let fields = prepay_fields(workspace, amount_cents, customer, return_url, bank_transfer); |
| 592 | let key = page_key( |
| 593 | "prepay", |
| 594 | workspace, |
| 595 | &format!("{amount_cents}/{bank_transfer}/{}", customer.unwrap_or("new")), |
| 596 | g1t_kit::now_ms(), |
| 597 | ); |
| 598 | self.send(Method::Post, "/checkout/sessions", Some(form(&fields)), Some(&key)).await |
| 599 | } |
| 600 | |
| 601 | /// Starts a page on which a feature's monthly plan is paid for by card, |
| 602 | /// at its price and nothing more, tax added where it applies. |
| 603 | pub async fn start_subscription( |
| 604 | &self, |
| 605 | workspace: &str, |
| 606 | feature: &str, |
| 607 | title: &str, |
| 608 | monthly_cents: u32, |
| 609 | customer: Option<&str>, |
| 610 | return_url: &str, |
| 611 | ) -> Result<Session> { |
| 612 | let fields = subscription_fields(workspace, feature, title, monthly_cents, customer, return_url); |
| 613 | let key = page_key( |
| 614 | "plan", |
| 615 | workspace, |
| 616 | &format!("{feature}/{monthly_cents}/{}", customer.unwrap_or("new")), |
| 617 | g1t_kit::now_ms(), |
| 618 | ); |
| 619 | self.send(Method::Post, "/checkout/sessions", Some(form(&fields)), Some(&key)).await |
| 620 | } |
| 621 | |
| 622 | /// Starts a page that saves and verifies a card, with 3-D Secure asked |
| 623 | /// for wherever the card supports it. Nothing is charged: the card's |
| 624 | /// bank sees at most a $0 or $1 authorization that is never captured. |
| 625 | pub async fn start_card_check(&self, workspace: &str, customer: &str, return_url: &str) -> Result<Session> { |
| 626 | let fields = card_check_fields(workspace, customer, return_url); |
| 627 | let key = page_key("card_check", workspace, customer, g1t_kit::now_ms()); |
| 628 | self.send(Method::Post, "/checkout/sessions", Some(form(&fields)), Some(&key)).await |
| 629 | } |
| 630 | |
| 631 | /// The customer's default payment method: the one its invoices are |
| 632 | /// charged to, else its newest card. None when it has none. |
| 633 | pub async fn default_payment_method(&self, customer: &str) -> Result<Option<SavedMethod>> { |
| 634 | let found: serde_json::Value = self |
| 635 | .call( |
| 636 | Method::Get, |
| 637 | &format!("/customers/{}?expand[]=invoice_settings.default_payment_method", encode(customer)), |
| 638 | None, |
| 639 | ) |
| 640 | .await?; |
| 641 | if let Some(method) = SavedMethod::from_json(&found["invoice_settings"]["default_payment_method"]) { |
| 642 | return Ok(Some(method)); |
| 643 | } |
| 644 | let list: serde_json::Value = self |
| 645 | .call(Method::Get, &format!("/payment_methods?customer={}&type=card&limit=1", encode(customer)), None) |
| 646 | .await?; |
| 647 | Ok(list["data"].as_array().and_then(|data| data.first()).and_then(SavedMethod::from_json)) |
| 648 | } |
| 649 | |
| 650 | /// The customer as Stripe keeps it, with its tax ids. |
| 651 | pub async fn customer(&self, customer: &str) -> Result<serde_json::Value> { |
| 652 | self.call(Method::Get, &format!("/customers/{}?expand[]=tax_ids", encode(customer)), None).await |
| 653 | } |
| 654 | |
| 655 | /// The customer's invoices, newest first. |
| 656 | pub async fn invoices(&self, customer: &str) -> Result<Vec<serde_json::Value>> { |
| 657 | let list: serde_json::Value = self.call(Method::Get, &format!("/invoices?customer={}&limit=24", encode(customer)), None).await?; |
| 658 | Ok(list["data"].as_array().cloned().unwrap_or_default()) |
| 659 | } |
| 660 | |
| 661 | /// Reverses a tax transaction in part for a refund: `refunded_cents` of |
| 662 | /// the payment, tax included, taken back across all of it. |
| 663 | pub async fn reverse_tax(&self, transaction: &str, reference: &str, refunded_cents: i64) -> Result<()> { |
| 664 | let _: serde_json::Value = self |
| 665 | .send( |
| 666 | Method::Post, |
| 667 | "/tax/transactions/create_reversal", |
| 668 | Some(form(&reversal_fields(transaction, reference, refunded_cents))), |
| 669 | Some(&format!("tax-reversal/{reference}")), |
| 670 | ) |
| 671 | .await?; |
| 672 | Ok(()) |
| 673 | } |
| 674 | |
| 675 | /// Copies the billing address entered with a card onto the customer |
| 676 | /// when the customer has none Stripe Tax can use, so later invoices and |
| 677 | /// charges can be taxed. Never replaces an address an owner gave. |
| 678 | pub async fn fill_address(&self, customer: &str, address: &serde_json::Value) -> Result<bool> { |
| 679 | if !address_places_customer(address) { |
| 680 | return Ok(false); |
| 681 | } |
| 682 | let found = self.customer(customer).await?; |
| 683 | if address_places_customer(&found["address"]) { |
| 684 | return Ok(false); |
| 685 | } |
| 686 | let _: serde_json::Value = self.post(&format!("/customers/{}", encode(customer)), &address_fields(address)).await?; |
| 687 | Ok(true) |
| 688 | } |
| 689 | |
| 690 | /// Whether the customer's address is enough for Stripe Tax. |
| 691 | pub async fn customer_placed(&self, customer: &str) -> Result<bool> { |
| 692 | let found = self.customer(customer).await?; |
| 693 | Ok(address_places_customer(&found["address"]) || address_places_customer(&found["shipping"]["address"])) |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | /// A customer's address from an address Stripe gave. |
| 698 | pub(crate) fn address_fields(address: &serde_json::Value) -> Vec<(&'static str, String)> { |
| 699 | let text = |key: &str| address[key].as_str().unwrap_or_default().to_owned(); |
| 700 | vec![ |
| 701 | ("address[line1]", text("line1")), |
| 702 | ("address[line2]", text("line2")), |
| 703 | ("address[city]", text("city")), |
| 704 | ("address[state]", text("state")), |
| 705 | ("address[postal_code]", text("postal_code")), |
| 706 | ("address[country]", text("country")), |
| 707 | ] |
| 708 | } |
| 709 | |
| 710 | /// A refund's tax reversal: a part of the payment, as a negative amount. |
| 711 | pub(crate) fn reversal_fields(transaction: &str, reference: &str, refunded_cents: i64) -> Vec<(&'static str, String)> { |
| 712 | vec![ |
| 713 | ("mode", "partial".to_owned()), |
| 714 | ("original_transaction", transaction.to_owned()), |
| 715 | ("reference", reference.to_owned()), |
| 716 | ("flat_amount", (-refunded_cents.abs()).to_string()), |
| 717 | ] |
| 718 | } |
| 719 | |
| 720 | /// A saved way to pay, as far as it is safe to show. |
| 721 | #[derive(Clone, Debug, PartialEq)] |
| 722 | pub struct SavedMethod { |
| 723 | pub id: String, |
| 724 | pub kind: String, |
| 725 | pub brand: Option<String>, |
| 726 | pub last4: Option<String>, |
| 727 | pub exp_month: Option<u32>, |
| 728 | pub exp_year: Option<u32>, |
| 729 | } |
| 730 | |
| 731 | impl SavedMethod { |
| 732 | fn from_json(method: &serde_json::Value) -> Option<SavedMethod> { |
| 733 | let id = method["id"].as_str()?.to_owned(); |
| 734 | let kind = method["type"].as_str().unwrap_or("card").to_owned(); |
| 735 | let details = &method[kind.as_str()]; |
| 736 | Some(SavedMethod { |
| 737 | id, |
| 738 | brand: details["brand"].as_str().or_else(|| details["bank_name"].as_str()).map(str::to_owned), |
| 739 | last4: details["last4"].as_str().map(str::to_owned), |
| 740 | exp_month: details["exp_month"].as_u64().map(|m| m as u32), |
| 741 | exp_year: details["exp_year"].as_u64().map(|y| y as u32), |
| 742 | kind, |
| 743 | }) |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | /// A new customer's fields: the workspace, and the email receipts go to |
| 748 | /// when there is one. |
| 749 | pub(crate) fn customer_fields(workspace: &str, email: Option<&str>) -> Vec<(&'static str, String)> { |
| 750 | let mut fields = vec![("name", workspace.to_owned()), ("metadata[workspace]", workspace.to_owned())]; |
| 751 | if let Some(email) = email.map(str::trim).filter(|e| e.contains('@')) { |
| 752 | fields.push(("email", email.to_owned())); |
| 753 | } |
| 754 | fields |
| 755 | } |
| 756 | |
| 757 | /// The idempotency key for a workspace's customer: one per workspace in ten |
| 758 | /// minutes, however many pages ask at once. Ten minutes, not for ever: a |
| 759 | /// customer deleted at Stripe is forgotten (`forget_customer`), and the |
| 760 | /// next must be new. The email is part of it, as Stripe refuses a key |
| 761 | /// reused with other fields. |
| 762 | pub(crate) fn customer_key(workspace: &str, email: Option<&str>, now_ms: u64) -> String { |
| 763 | format!("customer/{workspace}/{}/{}", email.map_or("-", str::trim), now_ms / 600_000) |
| 764 | } |
| 765 | |
| 766 | /// The idempotency key for a payment page: the same workspace, purpose and |
| 767 | /// details within ten minutes is one page, however often it is asked for (a |
| 768 | /// double click, two tabs). |
| 769 | pub(crate) fn page_key(purpose: &str, workspace: &str, details: &str, now_ms: u64) -> String { |
| 770 | format!("page/{purpose}/{workspace}/{details}/{}", now_ms / 600_000) |
| 771 | } |
| 772 | |
| 773 | /// Where Stripe sends the person back, with the page's id under `name`. |
| 774 | fn back_to(return_url: &str, name: &str) -> String { |
| 775 | let separator = if return_url.contains('?') { '&' } else { '?' }; |
| 776 | // Stripe fills in the page's id. |
| 777 | format!("{return_url}{separator}{name}={{CHECKOUT_SESSION_ID}}") |
| 778 | } |
| 779 | |
| 780 | /// The name of the card fee's line on payments from before the fee was |
| 781 | /// folded into g1t's prices. Nothing new carries it; paid invoices that do |
| 782 | /// still have it counted apart by this name (`invoice_split`). |
| 783 | pub(crate) const CARD_FEE_LINE: &str = "Card processing fee"; |
| 784 | |
| 785 | /// The form keys of the one line on a payment page: what is bought. |
| 786 | const LINE_KEYS: [&str; 8] = [ |
| 787 | "line_items[0][quantity]", |
| 788 | "line_items[0][price_data][currency]", |
| 789 | "line_items[0][price_data][unit_amount]", |
| 790 | "line_items[0][price_data][tax_behavior]", |
| 791 | "line_items[0][price_data][product_data][name]", |
| 792 | "line_items[0][price_data][product_data][tax_code]", |
| 793 | "line_items[0][price_data][product_data][description]", |
| 794 | "line_items[0][price_data][recurring][interval]", |
| 795 | ]; |
| 796 | |
| 797 | /// The one line on a payment page at g1t's tax code, its price excluding |
| 798 | /// tax; monthly when `monthly`. g1t's prices include Stripe's fee, so there |
| 799 | /// is never a second line for it. |
| 800 | fn page_line(cents: u32, name: String, description: Option<String>, monthly: bool) -> Vec<(&'static str, String)> { |
| 801 | let keys = LINE_KEYS; |
| 802 | let mut fields = vec![ |
| 803 | (keys[0], "1".to_owned()), |
| 804 | (keys[1], "usd".to_owned()), |
| 805 | (keys[2], cents.to_string()), |
| 806 | (keys[3], "exclusive".to_owned()), |
| 807 | (keys[4], name), |
| 808 | (keys[5], TAX_CODE.to_owned()), |
| 809 | ]; |
| 810 | if let Some(description) = description { |
| 811 | fields.push((keys[6], description)); |
| 812 | } |
| 813 | if monthly { |
| 814 | fields.push((keys[7], "month".to_owned())); |
| 815 | } |
| 816 | fields |
| 817 | } |
| 818 | |
| 819 | /// A prepayment page's fields: the amount prepaid as the one line, by card |
| 820 | /// or by bank transfer alike, tax added where it applies. |
| 821 | pub(crate) fn prepay_fields( |
| 822 | workspace: &str, |
| 823 | amount_cents: u32, |
| 824 | customer: Option<&str>, |
| 825 | return_url: &str, |
| 826 | bank_transfer: bool, |
| 827 | ) -> Vec<(&'static str, String)> { |
| 828 | let mut fields = vec![("mode", "payment".to_owned())]; |
| 829 | if bank_transfer { |
| 830 | fields.extend([ |
| 831 | ("payment_method_types[0]", "customer_balance".to_owned()), |
| 832 | ("payment_method_options[customer_balance][funding_type]", "bank_transfer".to_owned()), |
| 833 | ("payment_method_options[customer_balance][bank_transfer][type]", "us_bank_transfer".to_owned()), |
| 834 | ]); |
| 835 | } else { |
| 836 | fields.extend([ |
| 837 | ("payment_method_types[0]", "card".to_owned()), |
| 838 | ("payment_method_options[card][request_three_d_secure]", "any".to_owned()), |
| 839 | ("payment_intent_data[setup_future_usage]", "off_session".to_owned()), |
| 840 | ]); |
| 841 | } |
| 842 | fields.extend([ |
| 843 | ("success_url", back_to(return_url, "session")), |
| 844 | ("cancel_url", return_url.to_owned()), |
| 845 | ("client_reference_id", workspace.to_owned()), |
| 846 | ("metadata[workspace]", workspace.to_owned()), |
| 847 | ]); |
| 848 | fields.extend(page_line(amount_cents, format!("g1t usage paid in advance for {workspace}"), None, false)); |
| 849 | fields.extend(checkout_tax_fields(customer)); |
| 850 | match customer { |
| 851 | Some(customer) => fields.push(("customer", customer.to_owned())), |
| 852 | None => fields.push(("customer_creation", "always".to_owned())), |
| 853 | } |
| 854 | fields |
| 855 | } |
| 856 | |
| 857 | /// A plan's page's fields: the plan at its price, as its only line. In |
| 858 | /// subscription mode Stripe makes the customer itself when |
| 859 | /// there is none; `customer_creation` is for payment mode only. The |
| 860 | /// subscription it starts keeps `automatic_tax`, so every renewal is taxed. |
| 861 | pub(crate) fn subscription_fields( |
| 862 | workspace: &str, |
| 863 | feature: &str, |
| 864 | title: &str, |
| 865 | monthly_cents: u32, |
| 866 | customer: Option<&str>, |
| 867 | return_url: &str, |
| 868 | ) -> Vec<(&'static str, String)> { |
| 869 | let mut fields = vec![ |
| 870 | ("mode", "subscription".to_owned()), |
| 871 | ("payment_method_types[0]", "card".to_owned()), |
| 872 | ("success_url", back_to(return_url, "session")), |
| 873 | ("cancel_url", return_url.to_owned()), |
| 874 | ("client_reference_id", workspace.to_owned()), |
| 875 | ("metadata[workspace]", workspace.to_owned()), |
| 876 | ("metadata[feature]", feature.to_owned()), |
| 877 | ("subscription_data[metadata][workspace]", workspace.to_owned()), |
| 878 | ("subscription_data[metadata][feature]", feature.to_owned()), |
| 879 | ]; |
| 880 | fields.extend(page_line(monthly_cents, format!("g1t {title} for {workspace}"), None, true)); |
| 881 | fields.extend(checkout_tax_fields(customer)); |
| 882 | if let Some(customer) = customer { |
| 883 | fields.push(("customer", customer.to_owned())); |
| 884 | } |
| 885 | fields |
| 886 | } |
| 887 | |
| 888 | /// A card check's page's fields: setup mode, nothing charged, so nothing |
| 889 | /// to tax. Setup mode takes no line items and no amount. The billing |
| 890 | /// address is asked for all the same, and copied onto the customer once |
| 891 | /// the card is checked (`fill_address`), so the plan and invoices that |
| 892 | /// follow can be taxed. |
| 893 | pub(crate) fn card_check_fields(workspace: &str, customer: &str, return_url: &str) -> Vec<(&'static str, String)> { |
| 894 | vec![ |
| 895 | ("mode", "setup".to_owned()), |
| 896 | ("customer", customer.to_owned()), |
| 897 | ("payment_method_types[0]", "card".to_owned()), |
| 898 | ("payment_method_options[card][request_three_d_secure]", "any".to_owned()), |
| 899 | ("billing_address_collection", "required".to_owned()), |
| 900 | ("success_url", back_to(return_url, "card_check")), |
| 901 | ("cancel_url", return_url.to_owned()), |
| 902 | ("client_reference_id", workspace.to_owned()), |
| 903 | ("metadata[workspace]", workspace.to_owned()), |
| 904 | ("metadata[purpose]", "card_check".to_owned()), |
| 905 | ("setup_intent_data[metadata][workspace]", workspace.to_owned()), |
| 906 | ("setup_intent_data[description]", format!("Card check for g1t workspace {workspace}; never charged")), |
| 907 | ] |
| 908 | } |
| 909 | |
| 910 | /// A Stripe invoice's tax settings, for every invoice g1t makes: worked out |
| 911 | /// by Stripe Tax. |
| 912 | pub(crate) fn invoice_tax_fields() -> Vec<(&'static str, String)> { |
| 913 | vec![("automatic_tax[enabled]", "true".to_owned())] |
| 914 | } |
| 915 | |
| 916 | /// An invoice item's tax settings: g1t's tax code, the amount excluding tax. |
| 917 | pub(crate) fn item_tax_fields() -> Vec<(&'static str, String)> { |
| 918 | vec![("tax_behavior", "exclusive".to_owned()), ("tax_code", TAX_CODE.to_owned())] |
| 919 | } |
| 920 | |
| 921 | /// What a paid Stripe invoice comes to, as billing counts it: the tax |
| 922 | /// (`tax`, in this API version), any card fee (its lines, by name, on |
| 923 | /// invoices from before the fee was folded into prices), and what is left |
| 924 | /// for what was sold, all in cents. |
| 925 | #[derive(Clone, Copy, Debug, Default, PartialEq, Eq)] |
| 926 | pub(crate) struct InvoiceSplit { |
| 927 | pub tax_cents: i64, |
| 928 | pub fee_cents: i64, |
| 929 | pub net_cents: i64, |
| 930 | } |
| 931 | |
| 932 | /// A plan started on a saved card, as its subscription needs it. |
| 933 | pub(crate) struct SavedPlan<'a> { |
| 934 | pub workspace: &'a str, |
| 935 | pub feature: &'a str, |
| 936 | pub title: &'a str, |
| 937 | pub monthly_cents: u32, |
| 938 | pub customer: &'a str, |
| 939 | pub payment_method: &'a str, |
| 940 | } |
| 941 | |
| 942 | /// A subscription's fields, started on a saved card: the plan as its only |
| 943 | /// item, excluding tax, and Stripe Tax on. |
| 944 | pub(crate) fn saved_subscription_fields(p: &SavedPlan<'_>, product: &str) -> Vec<(&'static str, String)> { |
| 945 | vec![ |
| 946 | ("customer", p.customer.to_owned()), |
| 947 | ("default_payment_method", p.payment_method.to_owned()), |
| 948 | ("payment_behavior", "error_if_incomplete".to_owned()), |
| 949 | ("automatic_tax[enabled]", "true".to_owned()), |
| 950 | ("items[0][price_data][currency]", "usd".to_owned()), |
| 951 | ("items[0][price_data][product]", product.to_owned()), |
| 952 | ("items[0][price_data][unit_amount]", p.monthly_cents.to_string()), |
| 953 | ("items[0][price_data][recurring][interval]", "month".to_owned()), |
| 954 | ("items[0][price_data][tax_behavior]", "exclusive".to_owned()), |
| 955 | ("metadata[workspace]", p.workspace.to_owned()), |
| 956 | ("metadata[feature]", p.feature.to_owned()), |
| 957 | ("description", format!("{} plan for {}", p.title, p.workspace)), |
| 958 | ] |
| 959 | } |
| 960 | |
| 961 | pub(crate) fn invoice_split(invoice: &serde_json::Value, amount_paid: i64) -> InvoiceSplit { |
| 962 | let tax_cents = invoice["tax"].as_i64().unwrap_or(0).max(0); |
| 963 | let fee_cents: i64 = invoice["lines"]["data"] |
| 964 | .as_array() |
| 965 | .map(|lines| { |
| 966 | lines |
| 967 | .iter() |
| 968 | .filter(|line| line["description"].as_str().is_some_and(|d| d.contains(CARD_FEE_LINE))) |
| 969 | .map(|line| line["amount"].as_i64().unwrap_or(0)) |
| 970 | .sum() |
| 971 | }) |
| 972 | .unwrap_or(0); |
| 973 | let fee_cents = fee_cents.max(0); |
| 974 | InvoiceSplit { tax_cents, fee_cents, net_cents: (amount_paid - tax_cents - fee_cents).max(0) } |
| 975 | } |
| 976 | |
| 977 | impl Stripe { |
| 978 | /// What a card check's setup found, once it succeeded. |
| 979 | pub async fn checked_card(&self, setup_intent: &str) -> Result<Option<CheckedCard>> { |
| 980 | #[derive(Deserialize)] |
| 981 | struct Setup { |
| 982 | status: String, |
| 983 | payment_method: Option<String>, |
| 984 | } |
| 985 | #[derive(Deserialize)] |
| 986 | struct Card { |
| 987 | fingerprint: Option<String>, |
| 988 | brand: Option<String>, |
| 989 | last4: Option<String>, |
| 990 | funding: Option<String>, |
| 991 | country: Option<String>, |
| 992 | } |
| 993 | #[derive(Deserialize)] |
| 994 | struct Billing { |
| 995 | #[serde(default)] |
| 996 | address: Option<serde_json::Value>, |
| 997 | } |
| 998 | #[derive(Deserialize)] |
| 999 | struct PaymentMethod { |
| 1000 | card: Option<Card>, |
| 1001 | #[serde(default)] |
| 1002 | billing_details: Option<Billing>, |
| 1003 | } |
| 1004 | let setup: Setup = self.call(Method::Get, &format!("/setup_intents/{}", encode(setup_intent)), None).await?; |
| 1005 | let (true, Some(method)) = (setup.status == "succeeded", setup.payment_method) else { return Ok(None) }; |
| 1006 | let found: PaymentMethod = self.call(Method::Get, &format!("/payment_methods/{}", encode(&method)), None).await?; |
| 1007 | let card = found.card; |
| 1008 | let address = found.billing_details.and_then(|b| b.address).filter(|a| a.is_object()); |
| 1009 | Ok(Some(CheckedCard { |
| 1010 | address, |
| 1011 | payment_method: method, |
| 1012 | fingerprint: card.as_ref().and_then(|c| c.fingerprint.clone()), |
| 1013 | brand: card.as_ref().and_then(|c| c.brand.clone()), |
| 1014 | last4: card.as_ref().and_then(|c| c.last4.clone()), |
| 1015 | funding: card.as_ref().and_then(|c| c.funding.clone()), |
| 1016 | country: card.as_ref().and_then(|c| c.country.clone()), |
| 1017 | })) |
| 1018 | } |
| 1019 | |
| 1020 | /// Makes `payment_method` the card the customer's invoices are charged to. |
| 1021 | pub async fn set_default_card(&self, customer: &str, payment_method: &str) -> Result<()> { |
| 1022 | let _: serde_json::Value = self |
| 1023 | .call( |
| 1024 | Method::Post, |
| 1025 | &format!("/customers/{}", encode(customer)), |
| 1026 | Some(form(&[("invoice_settings[default_payment_method]", payment_method.to_owned())])), |
| 1027 | ) |
| 1028 | .await?; |
| 1029 | Ok(()) |
| 1030 | } |
| 1031 | |
| 1032 | /// One of g1t's products at Stripe, tagged `metadata[g1t]` (the plan's |
| 1033 | /// is `plan`), made the first time it is |
| 1034 | /// needed, with g1t's tax code. One made before Stripe Tax was on is |
| 1035 | /// given the code when it is found. |
| 1036 | async fn product(&self, tag: &str, name: &str) -> Result<String> { |
| 1037 | #[derive(Deserialize)] |
| 1038 | struct Product { |
| 1039 | id: String, |
| 1040 | #[serde(default)] |
| 1041 | metadata: Option<std::collections::HashMap<String, String>>, |
| 1042 | #[serde(default)] |
| 1043 | tax_code: Option<serde_json::Value>, |
| 1044 | } |
| 1045 | #[derive(Deserialize)] |
| 1046 | struct List { |
| 1047 | data: Vec<Product>, |
| 1048 | } |
| 1049 | let list: List = self.call(Method::Get, "/products?active=true&limit=100", None).await?; |
| 1050 | let ours = |p: &Product| p.metadata.as_ref().and_then(|m| m.get("g1t")).map(String::as_str) == Some(tag); |
| 1051 | if let Some(found) = list.data.into_iter().find(ours) { |
| 1052 | let coded = found.tax_code.as_ref().is_some_and(|code| code.as_str() == Some(TAX_CODE) || code["id"].as_str() == Some(TAX_CODE)); |
| 1053 | if !coded { |
| 1054 | let _: serde_json::Value = self |
| 1055 | .call(Method::Post, &format!("/products/{}", encode(&found.id)), Some(form(&[("tax_code", TAX_CODE.to_owned())]))) |
| 1056 | .await?; |
| 1057 | } |
| 1058 | return Ok(found.id); |
| 1059 | } |
| 1060 | let created: Product = self |
| 1061 | .call( |
| 1062 | Method::Post, |
| 1063 | "/products", |
| 1064 | Some(form(&[("name", name.to_owned()), ("metadata[g1t]", tag.to_owned()), ("tax_code", TAX_CODE.to_owned())])), |
| 1065 | ) |
| 1066 | .await?; |
| 1067 | Ok(created.id) |
| 1068 | } |
| 1069 | |
| 1070 | /// Archives one of g1t's products (by its `metadata[g1t]` tag), so it |
| 1071 | /// is never sold again; past invoices keep pointing at it. Nothing to |
| 1072 | /// do when there is no such active product. |
| 1073 | pub async fn archive_product(&self, tag: &str) -> Result<()> { |
| 1074 | #[derive(Deserialize)] |
| 1075 | struct Product { |
| 1076 | id: String, |
| 1077 | #[serde(default)] |
| 1078 | metadata: Option<std::collections::HashMap<String, String>>, |
| 1079 | } |
| 1080 | #[derive(Deserialize)] |
| 1081 | struct List { |
| 1082 | data: Vec<Product>, |
| 1083 | } |
| 1084 | let list: List = self.call(Method::Get, "/products?active=true&limit=100", None).await?; |
| 1085 | for product in list.data.into_iter().filter(|p| p.metadata.as_ref().and_then(|m| m.get("g1t")).map(String::as_str) == Some(tag)) { |
| 1086 | let _: serde_json::Value = self |
| 1087 | .call(Method::Post, &format!("/products/{}", encode(&product.id)), Some(form(&[("active", "false".to_owned())]))) |
| 1088 | .await?; |
| 1089 | } |
| 1090 | Ok(()) |
| 1091 | } |
| 1092 | |
| 1093 | /// Starts the monthly plan on a saved card, at once, at its price with |
| 1094 | /// tax worked out by Stripe Tax on every invoice. Fails rather than leaving it half-started when the card's |
| 1095 | /// bank wants the person again, or when Stripe Tax cannot place the |
| 1096 | /// customer (no billing address yet); the caller then sends them to |
| 1097 | /// Stripe's page, which asks for the address. |
| 1098 | #[allow(clippy::too_many_arguments)] |
| 1099 | pub async fn subscribe_with_card( |
| 1100 | &self, |
| 1101 | workspace: &str, |
| 1102 | feature: &str, |
| 1103 | title: &str, |
| 1104 | monthly_cents: u32, |
| 1105 | customer: &str, |
| 1106 | payment_method: &str, |
| 1107 | ) -> Result<StripeSubscription> { |
| 1108 | let product = self.product(feature, &format!("{title} plan")).await?; |
| 1109 | let plan = SavedPlan { workspace, feature, title, monthly_cents, customer, payment_method }; |
| 1110 | let fields = saved_subscription_fields(&plan, &product); |
| 1111 | let key = plan_key(workspace, feature, &format!("{payment_method}/{monthly_cents}"), g1t_kit::now_ms()); |
| 1112 | self.send(Method::Post, "/subscriptions", Some(form(&fields)), Some(&key)).await |
| 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | /// Ends a subscription now: one that never started properly. |
| 1117 | pub async fn cancel_now(&self, id: &str) -> Result<StripeSubscription> { |
| 1118 | self.call(Method::Delete, &format!("/subscriptions/{}", encode(id)), None).await |
| 1119 | } |
| 1120 | |
| 1121 | pub async fn subscription(&self, id: &str) -> Result<StripeSubscription> { |
| 1122 | self.call(Method::Get, &format!("/subscriptions/{}", encode(id)), None) |
| 1123 | .await |
| 1124 | } |
| 1125 | |
| 1126 | /// Ends a plan when its period does (`cancel` true), or takes that back. |
| 1127 | pub async fn cancel_at_period_end(&self, id: &str, cancel: bool) -> Result<StripeSubscription> { |
| 1128 | self.call( |
| 1129 | Method::Post, |
| 1130 | &format!("/subscriptions/{}", encode(id)), |
| 1131 | Some(form(&[("cancel_at_period_end", cancel.to_string())])), |
| 1132 | ) |
| 1133 | .await |
| 1134 | } |
| 1135 | |
| 1136 | pub async fn session(&self, id: &str) -> Result<Session> { |
| 1137 | self.call( |
| 1138 | Method::Get, |
| 1139 | &format!("/checkout/sessions/{}", encode(id)), |
| 1140 | None, |
| 1141 | ) |
| 1142 | .await |
| 1143 | } |
| 1144 | } |
| 1145 | |
| 1146 | /// Whether the processor said an id it was given does not exist, as when |
| 1147 | /// g1t moves to another Stripe account and ids saved from the old one stay |
| 1148 | /// behind, or the customer was deleted there. |
| 1149 | pub(crate) fn is_missing(error: &Error) -> bool { |
| 1150 | error.to_string().contains("resource_missing") |
| 1151 | } |
| 1152 | |
| 1153 | /// What reading a deleted customer comes to: Stripe's own shape for an id |
| 1154 | /// it does not have, so `is_missing` and `friendly` read it as one. |
| 1155 | const DELETED_CUSTOMER: &str = r#"the card processor answered 404: {"error": {"type": "invalid_request_error", "code": "resource_missing", "message": "The customer was deleted at Stripe."}}"#; |
| 1156 | |
| 1157 | /// Whether Stripe answered with a deleted customer (`{"id": "cus_…", |
| 1158 | /// "object": "customer", "deleted": true}`), which it does with a 200. |
| 1159 | pub(crate) fn is_deleted_customer(found: &serde_json::Value) -> bool { |
| 1160 | found["deleted"].as_bool() == Some(true) && found["object"].as_str() == Some("customer") |
| 1161 | } |
| 1162 | |
| 1163 | pub(crate) fn is_live(key: &str) -> bool { |
| 1164 | key.starts_with("sk_live_") || key.starts_with("rk_live_") |
| 1165 | } |
| 1166 | |
| 1167 | #[cfg(test)] |
| 1168 | mod tax_mode_tests { |
| 1169 | use super::*; |
| 1170 | |
| 1171 | #[test] |
| 1172 | fn untaxed_requests_lose_only_automatic_tax() { |
| 1173 | let body = form(&[("mode", "payment".to_owned()), ("automatic_tax[enabled]", "true".to_owned()), ("tax_id_collection[enabled]", "true".to_owned())]); |
| 1174 | assert_eq!(without_automatic_tax(&body), form(&[("mode", "payment".to_owned()), ("tax_id_collection[enabled]", "true".to_owned())])); |
| 1175 | assert!(taxed_path("/checkout/sessions") && taxed_path("/invoices") && taxed_path("/subscriptions")); |
| 1176 | assert!(!taxed_path("/invoices/in_1/finalize") && !taxed_path("/payment_intents")); |
| 1177 | } |
| 1178 | |
| 1179 | #[test] |
| 1180 | fn without_stripe_tax_a_live_key_charges_nothing_and_test_mode_goes_untaxed() { |
| 1181 | let body = form(&[("mode", "payment".to_owned()), ("automatic_tax[enabled]", "true".to_owned())]); |
| 1182 | assert_eq!(untaxed_body(false, &body).unwrap(), form(&[("mode", "payment".to_owned())])); |
| 1183 | let refused = untaxed_body(true, &body).unwrap_err(); |
| 1184 | // Refused as Stripe would, never a decline, with a sentence for the page. |
| 1185 | assert!(friendly(&refused).contains("sales tax")); |
| 1186 | assert!(!crate::invoices::is_decline(&refused.to_string())); |
| 1187 | } |
| 1188 | |
| 1189 | #[test] |
| 1190 | fn a_workspace_gets_one_customer_with_its_owners_email() { |
| 1191 | let fields = customer_fields("acme", Some(" ana@acme.test ")); |
| 1192 | assert!(fields.contains(&("email", "ana@acme.test".to_owned()))); |
| 1193 | assert!(customer_fields("acme", None).iter().all(|(name, _)| *name != "email")); |
| 1194 | assert!(customer_fields("acme", Some("not an email")).iter().all(|(name, _)| *name != "email")); |
| 1195 | let at = 1_791_000_000_000; |
| 1196 | // Two asking at once make one; another workspace, or later, another. |
| 1197 | assert_eq!(customer_key("acme", Some("a@b.c"), at), customer_key("acme", Some("a@b.c"), at + 1_000)); |
| 1198 | assert_ne!(customer_key("acme", Some("a@b.c"), at), customer_key("other", Some("a@b.c"), at)); |
| 1199 | assert_ne!(customer_key("acme", Some("a@b.c"), at), customer_key("acme", Some("a@b.c"), at + 600_000)); |
| 1200 | } |
| 1201 | } |
| 1202 | |
| 1203 | #[cfg(test)] |
| 1204 | mod tests { |
| 1205 | use super::*; |
| 1206 | |
| 1207 | #[test] |
| 1208 | fn asking_twice_for_a_plan_starts_one() { |
| 1209 | let at = 1_791_000_000_000; |
| 1210 | assert_eq!(plan_key("acme", "plan", "pm_1", at), plan_key("acme", "plan", "pm_1", at + 1_000)); |
| 1211 | assert_ne!(plan_key("acme", "plan", "pm_1", at), plan_key("acme", "plan", "pm_2", at)); |
| 1212 | assert_ne!(plan_key("acme", "plan", "pm_1", at), plan_key("other", "plan", "pm_1", at)); |
| 1213 | } |
| 1214 | |
| 1215 | #[test] |
| 1216 | fn form_values_are_percent_encoded() { |
| 1217 | assert_eq!( |
| 1218 | form(&[ |
| 1219 | ( |
| 1220 | "success_url", |
| 1221 | "https://g1t.sh/a/-/billing?session={ID}".to_owned() |
| 1222 | ), |
| 1223 | ("line_items[0][quantity]", "1".to_owned()), |
| 1224 | ]), |
| 1225 | "success_url=https%3A%2F%2Fg1t.sh%2Fa%2F-%2Fbilling%3Fsession%3D%7BID%7D&line_items%5B0%5D%5Bquantity%5D=1" |
| 1226 | ); |
| 1227 | } |
| 1228 | |
| 1229 | #[test] |
| 1230 | fn test_keys_are_not_live() { |
| 1231 | assert!(is_live("sk_live_abc")); |
| 1232 | assert!(!is_live("sk_test_abc")); |
| 1233 | assert!(!is_live("")); |
| 1234 | } |
| 1235 | |
| 1236 | fn has(fields: &[(&str, String)], name: &str) -> Option<String> { |
| 1237 | fields.iter().find(|(n, _)| *n == name).map(|(_, v)| v.clone()) |
| 1238 | } |
| 1239 | |
| 1240 | #[test] |
| 1241 | fn every_request_names_the_api_version_it_is_written_for() { |
| 1242 | // Without it a new Stripe account answers at its newest version, and |
| 1243 | // invoices, charges and pages read differently from what billing |
| 1244 | // expects. |
| 1245 | assert!(STRIPE_VERSION.starts_with("2025-02-24")); |
| 1246 | let source = include_str!("stripe.rs"); |
| 1247 | assert!(source.contains(concat!("headers.set(\"stripe-", "version\", STRIPE_VERSION)"))); |
| 1248 | } |
| 1249 | |
| 1250 | #[test] |
| 1251 | fn the_plans_page_is_a_subscription_without_payment_mode_fields() { |
| 1252 | let url = "https://g1t.sh/acme/-/billing?plan=plan"; |
| 1253 | for customer in [None, Some("cus_1")] { |
| 1254 | let fields = subscription_fields("acme", "plan", "g1t", 2_100, customer, url); |
| 1255 | assert_eq!(has(&fields, "mode").as_deref(), Some("subscription")); |
| 1256 | // customer_creation is for payment mode; Stripe refuses it here. |
| 1257 | assert!(has(&fields, "customer_creation").is_none()); |
| 1258 | assert!(has(&fields, "payment_intent_data[setup_future_usage]").is_none()); |
| 1259 | assert_eq!(has(&fields, "customer").as_deref(), customer); |
| 1260 | assert_eq!(has(&fields, "success_url").unwrap(), "https://g1t.sh/acme/-/billing?plan=plan&session={CHECKOUT_SESSION_ID}"); |
| 1261 | assert_eq!(has(&fields, "line_items[0][price_data][recurring][interval]").as_deref(), Some("month")); |
| 1262 | // The plan at its price is the only line: no card fee. |
| 1263 | assert_eq!(has(&fields, "line_items[0][price_data][unit_amount]").as_deref(), Some("2100")); |
| 1264 | assert!(has(&fields, "line_items[1][quantity]").is_none()); |
| 1265 | } |
| 1266 | } |
| 1267 | |
| 1268 | /// Every field a page must carry for Stripe Tax: tax on top of the |
| 1269 | /// price, an address always asked for, the buyer's tax ID, and each |
| 1270 | /// line at g1t's tax code, excluding tax. With a customer, what is |
| 1271 | /// entered is saved on it (Checkout refuses `automatic_tax` and |
| 1272 | /// `tax_id_collection` for a customer otherwise). |
| 1273 | fn assert_taxed_page(fields: &[(&str, String)], customer: Option<&str>) { |
| 1274 | assert_eq!(has(fields, "automatic_tax[enabled]").as_deref(), Some("true")); |
| 1275 | assert_eq!(has(fields, "billing_address_collection").as_deref(), Some("required")); |
| 1276 | assert_eq!(has(fields, "tax_id_collection[enabled]").as_deref(), Some("true")); |
| 1277 | let saved = if customer.is_some() { Some("auto") } else { None }; |
| 1278 | assert_eq!(has(fields, "customer_update[address]").as_deref(), saved); |
| 1279 | assert_eq!(has(fields, "customer_update[name]").as_deref(), saved); |
| 1280 | assert_eq!(has(fields, LINE_KEYS[3]).as_deref(), Some("exclusive")); |
| 1281 | assert_eq!(has(fields, LINE_KEYS[5]).as_deref(), Some(TAX_CODE)); |
| 1282 | // One line, never a second for a card fee. |
| 1283 | assert!(fields.iter().all(|(n, _)| !n.starts_with("line_items[1]"))); |
| 1284 | // No key twice: Stripe takes the last, silently. |
| 1285 | let mut names: Vec<&str> = fields.iter().map(|(n, _)| *n).collect(); |
| 1286 | names.sort_unstable(); |
| 1287 | let count = names.len(); |
| 1288 | names.dedup(); |
| 1289 | assert_eq!(names.len(), count); |
| 1290 | } |
| 1291 | |
| 1292 | #[test] |
| 1293 | fn every_payment_page_is_taxed_by_stripe_tax() { |
| 1294 | let url = "https://g1t.sh/acme/-/billing"; |
| 1295 | for customer in [None, Some("cus_1")] { |
| 1296 | // The plan and Security and quality. |
| 1297 | assert_taxed_page(&subscription_fields("acme", "plan", "g1t", 2_100, customer, url), customer); |
| 1298 | assert_taxed_page(&subscription_fields("acme", "security", "Security and quality", 1_000, customer, url), customer); |
| 1299 | // Prepaying by card and by bank transfer alike. |
| 1300 | assert_taxed_page(&prepay_fields("acme", 5_000, customer, url, false), customer); |
| 1301 | assert_taxed_page(&prepay_fields("acme", 100_000, customer, url, true), customer); |
| 1302 | } |
| 1303 | // tax_id_collection and customer_update are for payment and |
| 1304 | // subscription mode; a card check charges nothing, so it is not |
| 1305 | // taxed, but it asks for the address the plan will be taxed at. |
| 1306 | let check = card_check_fields("acme", "cus_1", url); |
| 1307 | assert!(has(&check, "automatic_tax[enabled]").is_none()); |
| 1308 | assert_eq!(has(&check, "billing_address_collection").as_deref(), Some("required")); |
| 1309 | } |
| 1310 | |
| 1311 | #[test] |
| 1312 | fn the_portal_manages_details_cards_invoices_and_ending_the_plan() { |
| 1313 | let fields = portal_fields(); |
| 1314 | let updates: Vec<&str> = |
| 1315 | fields.iter().filter(|(n, _)| n.starts_with("features[customer_update][allowed_updates]")).map(|(_, v)| v.as_str()).collect(); |
| 1316 | assert_eq!(updates, ["email", "address", "name", "tax_id", "phone"]); |
| 1317 | for (name, value) in [ |
| 1318 | ("features[customer_update][enabled]", "true"), |
| 1319 | ("features[payment_method_update][enabled]", "true"), |
| 1320 | ("features[invoice_history][enabled]", "true"), |
| 1321 | ("features[subscription_cancel][enabled]", "true"), |
| 1322 | ("features[subscription_cancel][mode]", "at_period_end"), |
| 1323 | ("features[subscription_cancel][cancellation_reason][enabled]", "true"), |
| 1324 | ("features[subscription_update][enabled]", "false"), |
| 1325 | ("business_profile[privacy_policy_url]", "https://g1t.sh/policies/privacy"), |
| 1326 | ("business_profile[terms_of_service_url]", "https://g1t.sh/policies/terms"), |
| 1327 | ("metadata[g1t]", "billing"), |
| 1328 | ] { |
| 1329 | assert_eq!(has(&fields, name).as_deref(), Some(value), "{name}"); |
| 1330 | } |
| 1331 | assert!(has(&fields, "business_profile[headline]").is_some()); |
| 1332 | // Stripe wants the reasons whenever it asks for one. |
| 1333 | assert_eq!(has(&fields, "features[subscription_cancel][cancellation_reason][options][7]").as_deref(), Some("other")); |
| 1334 | let mut names: Vec<&str> = fields.iter().map(|(n, _)| *n).collect(); |
| 1335 | names.sort_unstable(); |
| 1336 | let count = names.len(); |
| 1337 | names.dedup(); |
| 1338 | assert_eq!(names.len(), count); |
| 1339 | } |
| 1340 | |
| 1341 | #[test] |
| 1342 | fn our_portal_configuration_is_found_by_its_tag_not_made_twice() { |
| 1343 | let config = |id: &str, active: bool, tag: Option<&str>| PortalConfiguration { |
| 1344 | id: id.to_owned(), |
| 1345 | active, |
| 1346 | login_page: None, |
| 1347 | metadata: tag.map(|t| std::collections::HashMap::from([("g1t".to_owned(), t.to_owned())])), |
| 1348 | }; |
| 1349 | assert_eq!(ours(vec![config("a", true, None), config("b", false, Some("billing")), config("c", true, Some("billing"))]).map(|c| c.id).as_deref(), Some("c")); |
| 1350 | assert_eq!(ours(vec![config("b", false, Some("billing"))]).map(|c| c.id).as_deref(), Some("b")); |
| 1351 | assert!(ours(vec![config("a", true, None), config("d", true, Some("other"))]).is_none()); |
| 1352 | } |
| 1353 | |
| 1354 | #[test] |
| 1355 | fn stripe_taxs_settings_say_what_is_missing() { |
| 1356 | let settings: TaxSettings = |
| 1357 | serde_json::from_value(serde_json::json!({ "status": "pending", "status_details": { "pending": { "missing_fields": ["head_office"] } } })).unwrap(); |
| 1358 | assert_eq!(settings.status, "pending"); |
| 1359 | assert_eq!(settings.status_details.pending.and_then(|p| p.missing_fields), Some(vec!["head_office".to_owned()])); |
| 1360 | let active: TaxSettings = serde_json::from_value(serde_json::json!({ "status": "active", "status_details": { "active": {} } })).unwrap(); |
| 1361 | assert!(active.status_details.pending.is_none()); |
| 1362 | } |
| 1363 | |
| 1364 | #[test] |
| 1365 | fn a_deleted_customer_reads_as_missing() { |
| 1366 | let deleted = serde_json::json!({ "id": "cus_1", "object": "customer", "deleted": true }); |
| 1367 | assert!(is_deleted_customer(&deleted)); |
| 1368 | assert!(is_missing(&Error::RustError(DELETED_CUSTOMER.to_owned()))); |
| 1369 | assert_eq!(friendly(&Error::RustError(DELETED_CUSTOMER.to_owned())), "Stripe refused it: The customer was deleted at Stripe."); |
| 1370 | // A customer as usual, and a deleted thing that is not a customer. |
| 1371 | assert!(!is_deleted_customer(&serde_json::json!({ "id": "cus_1", "object": "customer", "email": null }))); |
| 1372 | assert!(!is_deleted_customer(&serde_json::json!({ "id": "txi_1", "object": "tax_id", "deleted": true }))); |
| 1373 | } |
| 1374 | |
| 1375 | #[test] |
| 1376 | fn no_prepayment_has_a_card_fee_line() { |
| 1377 | for bank_transfer in [true, false] { |
| 1378 | let fields = prepay_fields("acme", 5_000, Some("cus_1"), "https://g1t.sh/acme/-/billing", bank_transfer); |
| 1379 | assert_eq!(has(&fields, "line_items[0][price_data][unit_amount]").as_deref(), Some("5000")); |
| 1380 | assert!(has(&fields, "line_items[1][quantity]").is_none()); |
| 1381 | assert!(fields.iter().all(|(_, v)| !v.contains(CARD_FEE_LINE))); |
| 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | #[test] |
| 1386 | fn a_plan_on_a_saved_card_is_taxed_at_its_price_alone() { |
| 1387 | let plan = SavedPlan { workspace: "acme", feature: "plan", title: "g1t", monthly_cents: 2_100, customer: "cus_1", payment_method: "pm_1" }; |
| 1388 | let fields = saved_subscription_fields(&plan, "prod_plan"); |
| 1389 | assert_eq!(has(&fields, "automatic_tax[enabled]").as_deref(), Some("true")); |
| 1390 | assert_eq!(has(&fields, "items[0][price_data][tax_behavior]").as_deref(), Some("exclusive")); |
| 1391 | assert_eq!(has(&fields, "items[0][price_data][unit_amount]").as_deref(), Some("2100")); |
| 1392 | assert!(fields.iter().all(|(n, _)| !n.starts_with("items[1]"))); |
| 1393 | } |
| 1394 | |
| 1395 | #[test] |
| 1396 | fn invoices_and_their_lines_are_taxed() { |
| 1397 | assert_eq!(has(&invoice_tax_fields(), "automatic_tax[enabled]").as_deref(), Some("true")); |
| 1398 | let item = item_tax_fields(); |
| 1399 | assert_eq!(has(&item, "tax_behavior").as_deref(), Some("exclusive")); |
| 1400 | assert_eq!(has(&item, "tax_code").as_deref(), Some(TAX_CODE)); |
| 1401 | } |
| 1402 | |
| 1403 | #[test] |
| 1404 | fn a_refund_reverses_part_of_its_tax() { |
| 1405 | let reversal = reversal_fields("tax_1", "pi_1/re_1", 500); |
| 1406 | assert_eq!(has(&reversal, "flat_amount").as_deref(), Some("-500")); |
| 1407 | assert_eq!(has(&reversal, "mode").as_deref(), Some("partial")); |
| 1408 | } |
| 1409 | |
| 1410 | #[test] |
| 1411 | fn a_paid_invoice_splits_into_tax_card_fee_and_what_was_sold() { |
| 1412 | let invoice = serde_json::json!({ |
| 1413 | "tax": 180, |
| 1414 | "lines": { "data": [ |
| 1415 | { "description": "1 × g1t plan (at $20.00 / month)", "amount": 2000 }, |
| 1416 | { "description": "1 × Card processing fee (at $0.92 / month)", "amount": 92 }, |
| 1417 | ] } |
| 1418 | }); |
| 1419 | assert_eq!(invoice_split(&invoice, 2_272), InvoiceSplit { tax_cents: 180, fee_cents: 92, net_cents: 2_000 }); |
| 1420 | // Before Stripe Tax: no tax, no fee, all of it sold. |
| 1421 | assert_eq!(invoice_split(&serde_json::json!({ "tax": null }), 2_000).net_cents, 2_000); |
| 1422 | // A page's tax and what came before it. |
| 1423 | let session: Session = serde_json::from_value(serde_json::json!({ |
| 1424 | "id": "cs_1", "payment_status": "paid", "amount_total": 5_585, "amount_subtotal": 5_185, |
| 1425 | "total_details": { "amount_tax": 400 }, "customer": "cus_1", "payment_intent": "pi_1" |
| 1426 | })) |
| 1427 | .unwrap(); |
| 1428 | assert_eq!((session.tax_cents(), session.before_tax_cents()), (400, 5_185)); |
| 1429 | } |
| 1430 | |
| 1431 | #[test] |
| 1432 | fn an_address_places_a_customer_for_tax() { |
| 1433 | use serde_json::json; |
| 1434 | assert!(address_places_customer(&json!({ "country": "DE" }))); |
| 1435 | assert!(address_places_customer(&json!({ "country": "US", "postal_code": "94107" }))); |
| 1436 | assert!(!address_places_customer(&json!({ "country": "US", "postal_code": "" }))); |
| 1437 | assert!(address_places_customer(&json!({ "country": "CA", "state": "ON" }))); |
| 1438 | assert!(!address_places_customer(&json!({ "country": "" }))); |
| 1439 | assert!(!address_places_customer(&serde_json::Value::Null)); |
| 1440 | let error = Error::RustError(r#"the card processor answered 400: {"error":{"code":"customer_tax_location_invalid","message":"x"}}"#.into()); |
| 1441 | assert!(is_tax_location_error(&error)); |
| 1442 | } |
| 1443 | |
| 1444 | #[test] |
| 1445 | fn a_card_check_is_a_setup_page_with_no_amount() { |
| 1446 | let fields = card_check_fields("acme", "cus_1", "https://g1t.sh/acme/-/billing"); |
| 1447 | assert_eq!(has(&fields, "mode").as_deref(), Some("setup")); |
| 1448 | assert!(fields.iter().all(|(n, _)| !n.starts_with("line_items"))); |
| 1449 | assert_eq!(has(&fields, "success_url").unwrap(), "https://g1t.sh/acme/-/billing?card_check={CHECKOUT_SESSION_ID}"); |
| 1450 | assert_eq!(has(&fields, "customer").as_deref(), Some("cus_1")); |
| 1451 | } |
| 1452 | |
| 1453 | #[test] |
| 1454 | fn a_page_asked_for_twice_is_one_page() { |
| 1455 | let at = 1_791_000_000_000; |
| 1456 | assert_eq!(page_key("plan", "acme", "plan/2000", at), page_key("plan", "acme", "plan/2000", at + 60_000)); |
| 1457 | assert_ne!(page_key("plan", "acme", "plan/2000", at), page_key("prepay", "acme", "plan/2000", at)); |
| 1458 | } |
| 1459 | |
| 1460 | #[test] |
| 1461 | fn a_stripe_failure_reads_as_a_sentence_never_raw() { |
| 1462 | let refused = Error::RustError( |
| 1463 | r#"the card processor answered 400: {"error":{"message":"You may only specify one of these parameters: customer, customer_creation.","type":"invalid_request_error"}}"#.into(), |
| 1464 | ); |
| 1465 | assert_eq!(friendly(&refused), "Stripe refused it: You may only specify one of these parameters: customer, customer_creation."); |
| 1466 | assert!(!friendly(&refused).contains("invalid_request_error")); |
| 1467 | let odd = Error::RustError("the card processor answered 502: <html>".into()); |
| 1468 | assert!(friendly(&odd).starts_with("Stripe refused it. Try again")); |
| 1469 | let down = Error::RustError("network connection lost".into()); |
| 1470 | assert_eq!(friendly(&down), "Stripe could not be reached. Try again in a minute."); |
| 1471 | } |
| 1472 | } |