| 1 | //! How far a workspace can run up costs g1t has not been paid for. |
| 2 | //! |
| 3 | //! Every sandbox second, build, app request and model token costs g1t |
| 4 | //! money at Cloudflare or a model provider before the workspace pays for |
| 5 | //! it. So, like Fly or Cloudflare with new accounts, each workspace has a |
| 6 | //! ceiling on that unpaid usage, set by how much it has paid g1t before: |
| 7 | //! |
| 8 | //! - **New**: no live payment yet. A few dollars, enough for the free |
| 9 | //! allowances and a little more. |
| 10 | //! - **Paid**: twice what it has paid g1t, within bounds. |
| 11 | //! - **Reviewed**: a ceiling g1t set by hand. |
| 12 | //! - **Internal**: g1t's own workspaces, with none. |
| 13 | //! |
| 14 | //! An owner can set a lower spend limit of their own. Past 80% the |
| 15 | //! workspace is warned; at the ceiling its work stops: no new sandboxes, |
| 16 | //! builds or app requests, until it pays or the month turns. Runs already |
| 17 | //! under way finish. |
| 18 | //! |
| 19 | //! Usage counts at what it cost g1t or what it is charged, whichever is |
| 20 | //! more, so it counts while g1t is free too: free is a price, not an |
| 21 | //! exemption from the ceiling. Test-mode payments are not money, so they |
| 22 | //! do not raise trust. |
| 23 | |
| 24 | use g1t_contracts::billing::{CheckLimitArgs, Limit, LimitArgs, NotePendingArgs, TermsKind, LimitState, SetSpendLimitArgs, Trust}; |
| 25 | use g1t_contracts::time::rfc3339; |
| 26 | use g1t_contracts::{FailureCode, Outcome, Role}; |
| 27 | use g1t_kit::now_ms; |
| 28 | use serde::Deserialize; |
| 29 | use worker::wasm_bindgen::JsValue; |
| 30 | use worker::{Env, Result}; |
| 31 | |
| 32 | use crate::features::dollars as dollars_plain; |
| 33 | use crate::{Billing, members_only}; |
| 34 | |
| 35 | /// The ceilings, from the billing service's variables. |
| 36 | pub(crate) struct Ceilings { |
| 37 | /// `LIMIT_NEW_MICROS`. |
| 38 | pub new: i64, |
| 39 | /// `LIMIT_PAID_MIN_MICROS` and `LIMIT_PAID_MAX_MICROS`. |
| 40 | pub paid_min: i64, |
| 41 | pub paid_max: i64, |
| 42 | } |
| 43 | |
| 44 | impl Ceilings { |
| 45 | pub(crate) fn from_env(env: &Env) -> Self { |
| 46 | let number = |name: &str, default: i64| { |
| 47 | env.var(name).ok().and_then(|v| v.to_string().parse::<i64>().ok()).unwrap_or(default) |
| 48 | }; |
| 49 | Ceilings { |
| 50 | new: number("LIMIT_NEW_MICROS", 3_000_000), |
| 51 | paid_min: number("LIMIT_PAID_MIN_MICROS", 25_000_000), |
| 52 | paid_max: number("LIMIT_PAID_MAX_MICROS", 1_000_000_000), |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | /// The ceiling for a workspace that has paid `paid` in live money. |
| 57 | pub(crate) fn for_paid(&self, paid: i64) -> i64 { |
| 58 | (paid * 2).clamp(self.paid_min, self.paid_max) |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | /// Where a workspace stands against its ceiling. |
| 63 | pub(crate) fn state(exposure: i64, ceiling: Option<i64>) -> LimitState { |
| 64 | match ceiling { |
| 65 | Some(ceiling) if exposure >= ceiling => LimitState::Stopped, |
| 66 | Some(ceiling) if exposure * 5 >= ceiling * 4 => LimitState::Warning, |
| 67 | _ => LimitState::Ok, |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | /// Never charged automatically for less. |
| 72 | const AUTOPAY_MIN_CENTS: i64 = 500; |
| 73 | |
| 74 | #[derive(Deserialize)] |
| 75 | struct LimitRow { |
| 76 | spend_limit_micros: Option<i64>, |
| 77 | autopay_failed_at: Option<String>, |
| 78 | autopay_error: Option<String>, |
| 79 | } |
| 80 | |
| 81 | #[derive(Deserialize)] |
| 82 | struct Month { |
| 83 | used: Option<i64>, |
| 84 | paid: Option<i64>, |
| 85 | } |
| 86 | |
| 87 | #[derive(Deserialize)] |
| 88 | struct Paid { |
| 89 | paid: Option<i64>, |
| 90 | } |
| 91 | |
| 92 | impl Billing { |
| 93 | /// The workspace's limit, worked out from the ledger of the account |
| 94 | /// that pays for it: its own, or its enterprise's, whose workspaces' |
| 95 | /// usage and payments count together. |
| 96 | pub(crate) async fn limit_of(&self, workspace: &str) -> Result<Limit> { |
| 97 | let workspace = workspace.to_lowercase(); |
| 98 | let account = self.account_of(&workspace).await?; |
| 99 | let row = self |
| 100 | .db |
| 101 | .prepare("SELECT spend_limit_micros, autopay_failed_at, autopay_error FROM limits WHERE workspace = ?") |
| 102 | .bind(&[workspace.as_str().into()])? |
| 103 | .first::<LimitRow>(None) |
| 104 | .await?; |
| 105 | let month_start = format!("{}-01", &rfc3339(now_ms())[..7]); |
| 106 | let marks = vec!["?"; account.workspaces.len().max(1)].join(", "); |
| 107 | let members: Vec<JsValue> = if account.workspaces.is_empty() { |
| 108 | vec![JsValue::from(workspace.as_str())] |
| 109 | } else { |
| 110 | account.workspaces.iter().map(|w| JsValue::from(w.as_str())).collect() |
| 111 | }; |
| 112 | let mut with_month = members.clone(); |
| 113 | with_month.push(month_start.as_str().into()); |
| 114 | // Each usage entry at its cost to g1t or its charge, whichever is |
| 115 | // more; on the workspace's own provider, only g1t's fee is g1t's. |
| 116 | let month = self |
| 117 | .db |
| 118 | .prepare(format!( |
| 119 | "SELECT |
| 120 | SUM(CASE WHEN kind = 'usage' THEN |
| 121 | CASE WHEN COALESCE(billed_to, 'g1t') = 'g1t' |
| 122 | THEN MAX(COALESCE(cost_micros, 0), -amount_micros) |
| 123 | ELSE -amount_micros END |
| 124 | END) AS used, |
| 125 | SUM(CASE WHEN kind = 'top_up' THEN amount_micros END) AS paid |
| 126 | FROM ledger WHERE workspace IN ({marks}) AND created_at >= ?" |
| 127 | )) |
| 128 | .bind(&with_month)? |
| 129 | .first::<Month>(None) |
| 130 | .await?; |
| 131 | let (used, paid_month) = month.map_or((0, 0), |m| (m.used.unwrap_or(0), m.paid.unwrap_or(0))); |
| 132 | // And what is metered but not charged until the month closes. |
| 133 | let mut pending_args = members.clone(); |
| 134 | pending_args.push(month_start[..7].into()); |
| 135 | let pending = self |
| 136 | .db |
| 137 | .prepare(format!( |
| 138 | "SELECT SUM(charge_micros) AS paid FROM pending_usage WHERE workspace IN ({marks}) AND month = ?" |
| 139 | )) |
| 140 | .bind(&pending_args)? |
| 141 | .first::<Paid>(None) |
| 142 | .await? |
| 143 | .and_then(|row| row.paid) |
| 144 | .unwrap_or(0); |
| 145 | let used = used + pending; |
| 146 | // Test-mode payments are not money: they pay nothing off. |
| 147 | let live = self.stripe.as_ref().is_some_and(crate::stripe::Stripe::live); |
| 148 | // Charges from earlier months still unpaid carry over, so a new |
| 149 | // month is not a fresh allowance for an account that never pays. |
| 150 | // Credits g1t gave count as paid; test-mode payments do not. |
| 151 | let mut before = members.clone(); |
| 152 | before.push(month_start.as_str().into()); |
| 153 | let carried = self |
| 154 | .db |
| 155 | .prepare(format!( |
| 156 | "SELECT SUM(CASE WHEN kind = 'usage' THEN amount_micros |
| 157 | WHEN kind = 'top_up' AND ({live} = 1 OR reference LIKE 'crd%') THEN amount_micros |
| 158 | ELSE 0 END) AS paid |
| 159 | FROM ledger WHERE workspace IN ({marks}) AND created_at < ?", |
| 160 | live = u8::from(live) |
| 161 | )) |
| 162 | .bind(&before)? |
| 163 | .first::<Paid>(None) |
| 164 | .await? |
| 165 | .and_then(|row| row.paid) |
| 166 | .map_or(0, |balance| (-balance).max(0)); |
| 167 | let exposure = (used - if live { paid_month } else { 0 }).max(0) + carried; |
| 168 | |
| 169 | let (trust, trust_ceiling) = match account.terms.kind { |
| 170 | TermsKind::Comped => (Trust::Internal, None), |
| 171 | _ if account.terms.ceiling_micros.is_some() => (Trust::Reviewed, account.terms.ceiling_micros), |
| 172 | _ => { |
| 173 | let paid = self.live_paid(&members).await?; |
| 174 | if paid > 0 { |
| 175 | (Trust::Paid, Some(self.ceilings.for_paid(paid))) |
| 176 | } else { |
| 177 | (Trust::New, Some(self.ceilings.new)) |
| 178 | } |
| 179 | } |
| 180 | }; |
| 181 | let spend_limit = row.as_ref().and_then(|row| row.spend_limit_micros); |
| 182 | // A card declined when g1t charged it at the limit stops work until |
| 183 | // it is paid; any payment clears it. |
| 184 | let declined = row.as_ref().and_then(|row| row.autopay_failed_at.clone().map(|at| (at, row.autopay_error.clone()))); |
| 185 | let ceiling = match (trust_ceiling, spend_limit) { |
| 186 | (Some(ceiling), Some(own)) => Some(ceiling.min(own)), |
| 187 | (None, Some(own)) => Some(own), |
| 188 | (ceiling, None) => ceiling, |
| 189 | }; |
| 190 | let state = if declined.is_some() && exposure > 0 { LimitState::Stopped } else { state(exposure, ceiling) }; |
| 191 | let who = if account.kind == g1t_contracts::billing::AccountKind::Enterprise { |
| 192 | format!("The {} enterprise, which pays for {workspace},", account.name) |
| 193 | } else { |
| 194 | format!("The {workspace} workspace") |
| 195 | }; |
| 196 | let message = match state { |
| 197 | LimitState::Ok => None, |
| 198 | LimitState::Warning => Some(format!( |
| 199 | "{who} has used {} of its {} limit this month. At the limit, its sandboxes, builds and apps stop until it pays or the month turns.", |
| 200 | dollars_plain(exposure), |
| 201 | dollars_plain(ceiling.unwrap_or_default()), |
| 202 | )), |
| 203 | LimitState::Stopped if declined.is_some() => Some(format!( |
| 204 | "{who} could not be charged for its usage ({}), so its sandboxes, builds and apps are stopped. An owner can pay under Billing with another card.", |
| 205 | declined.as_ref().and_then(|(_, error)| error.clone()).unwrap_or_else(|| "the card was declined".to_owned()), |
| 206 | )), |
| 207 | LimitState::Stopped => Some(if spend_limit.is_some() && ceiling == spend_limit { |
| 208 | format!( |
| 209 | "The {workspace} workspace reached the {} spend limit its owners set for this month, so its sandboxes, builds and apps are stopped. An owner can raise it under Billing.", |
| 210 | dollars_plain(ceiling.unwrap_or_default()), |
| 211 | ) |
| 212 | } else { |
| 213 | format!( |
| 214 | "{who} reached its {} limit for usage not yet paid for, so its sandboxes, builds and apps are stopped. The limit grows as a workspace pays g1t; an owner can pay under Billing, or write to support to have it raised.", |
| 215 | dollars_plain(ceiling.unwrap_or_default()), |
| 216 | ) |
| 217 | }), |
| 218 | }; |
| 219 | Ok(Limit { |
| 220 | workspace, |
| 221 | account: account.id, |
| 222 | account_name: account.name, |
| 223 | trust, |
| 224 | exposure_micros: exposure, |
| 225 | ceiling_micros: ceiling, |
| 226 | trust_ceiling_micros: trust_ceiling, |
| 227 | spend_limit_micros: spend_limit, |
| 228 | state, |
| 229 | message, |
| 230 | }) |
| 231 | } |
| 232 | |
| 233 | /// Real money the workspaces have paid g1t. Nothing in test mode, and |
| 234 | /// credits g1t gave are not payments. |
| 235 | async fn live_paid(&self, members: &[JsValue]) -> Result<i64> { |
| 236 | if !self.stripe.as_ref().is_some_and(crate::stripe::Stripe::live) { |
| 237 | return Ok(0); |
| 238 | } |
| 239 | let marks = vec!["?"; members.len().max(1)].join(", "); |
| 240 | Ok(self |
| 241 | .db |
| 242 | .prepare(format!( |
| 243 | "SELECT SUM(amount_micros) AS paid FROM ledger |
| 244 | WHERE workspace IN ({marks}) AND kind = 'top_up' AND reference NOT LIKE 'crd%'" |
| 245 | )) |
| 246 | .bind(members)? |
| 247 | .first::<Paid>(None) |
| 248 | .await? |
| 249 | .and_then(|row| row.paid) |
| 250 | .unwrap_or(0)) |
| 251 | } |
| 252 | |
| 253 | /// A refusal, with the reason, when the workspace's work is stopped. |
| 254 | /// None while billing is off: a g1t without payments has no limits. |
| 255 | pub(crate) async fn stopped<T>(&self, workspace: &str) -> Result<Option<Outcome<T>>> { |
| 256 | if self.stripe.is_none() { |
| 257 | return Ok(None); |
| 258 | } |
| 259 | let limit = self.limit_of(workspace).await?; |
| 260 | Ok((limit.state == LimitState::Stopped).then(|| { |
| 261 | Outcome::fail( |
| 262 | FailureCode::PaymentRequired, |
| 263 | limit.message.unwrap_or_else(|| "This workspace is over its limit.".to_owned()), |
| 264 | ) |
| 265 | })) |
| 266 | } |
| 267 | |
| 268 | pub(crate) async fn limit(&self, a: LimitArgs) -> Result<Outcome<Limit>> { |
| 269 | let workspace = a.workspace.to_lowercase(); |
| 270 | if !a.viewer.is_some_and(|viewer| viewer.is_member(&workspace)) { |
| 271 | return Ok(members_only()); |
| 272 | } |
| 273 | Ok(Outcome::Ok(self.limit_of(&workspace).await?)) |
| 274 | } |
| 275 | |
| 276 | pub(crate) async fn note_pending(&self, a: NotePendingArgs) -> Result<bool> { |
| 277 | let now = rfc3339(now_ms()); |
| 278 | let charge = crate::charge_micros(a.cost_micros.max(0) as f64 / g1t_contracts::billing::MICROS_PER_DOLLAR as f64, self.margin_percent); |
| 279 | self.db |
| 280 | .prepare( |
| 281 | "INSERT INTO pending_usage (workspace, source, month, charge_micros, updated_at) VALUES (?1, ?2, ?3, ?4, ?5) |
| 282 | ON CONFLICT (workspace, source, month) DO UPDATE SET charge_micros = ?4, updated_at = ?5", |
| 283 | ) |
| 284 | .bind(&[ |
| 285 | a.workspace.to_lowercase().into(), |
| 286 | a.source.as_str().into(), |
| 287 | now[..7].into(), |
| 288 | (charge as f64).into(), |
| 289 | now.as_str().into(), |
| 290 | ])? |
| 291 | .run() |
| 292 | .await?; |
| 293 | Ok(true) |
| 294 | } |
| 295 | |
| 296 | /// Charges the saved card of each workspace nearing its limit, for what |
| 297 | /// it owes, so that a workspace that pays never has its work stopped. |
| 298 | /// Only with live payments: test-mode payments are not money and lower |
| 299 | /// nothing. Not for a workspace's own spend limit, which means stop, nor |
| 300 | /// for enterprises, which are invoiced. |
| 301 | pub(crate) async fn autopay(&self) -> Result<()> { |
| 302 | let Some(stripe) = self.stripe.as_ref().filter(|stripe| stripe.live()) else { |
| 303 | return Ok(()); |
| 304 | }; |
| 305 | #[derive(Deserialize)] |
| 306 | struct Candidate { |
| 307 | workspace: String, |
| 308 | customer_id: Option<String>, |
| 309 | } |
| 310 | let month_start = format!("{}-01", &rfc3339(now_ms())[..7]); |
| 311 | let candidates = self |
| 312 | .db |
| 313 | .prepare( |
| 314 | "SELECT DISTINCT ledger.workspace AS workspace, accounts.customer_id AS customer_id |
| 315 | FROM ledger JOIN accounts ON accounts.workspace = ledger.workspace |
| 316 | WHERE ledger.kind = 'usage' AND ledger.created_at >= ? AND accounts.customer_id IS NOT NULL", |
| 317 | ) |
| 318 | .bind(&[month_start.as_str().into()])? |
| 319 | .all() |
| 320 | .await? |
| 321 | .results::<Candidate>()?; |
| 322 | for candidate in candidates { |
| 323 | let Some(customer) = candidate.customer_id else { continue }; |
| 324 | let limit = self.limit_of(&candidate.workspace).await?; |
| 325 | let own_limit = limit.spend_limit_micros.is_some() && limit.ceiling_micros == limit.spend_limit_micros; |
| 326 | if limit.state == LimitState::Ok |
| 327 | || own_limit |
| 328 | || limit.trust == Trust::Internal |
| 329 | || limit.account.starts_with("ent_") |
| 330 | { |
| 331 | continue; |
| 332 | } |
| 333 | // What it owes: its charges less what it has paid, never the cost |
| 334 | // of what was free to it. At least the minimum, which is credit |
| 335 | // toward what comes next. |
| 336 | let balance = self.row(&candidate.workspace).await?.map_or(0, |row| row.balance_micros); |
| 337 | let owed = (-balance).max(0); |
| 338 | if owed == 0 { |
| 339 | continue; |
| 340 | } |
| 341 | let cents = ((owed + 9_999) / 10_000).max(AUTOPAY_MIN_CENTS); |
| 342 | let key = format!("autopay/{}/{}/{}", candidate.workspace, &month_start[..7], owed / 1_000_000); |
| 343 | let description = format!("g1t usage for {}, paid automatically near its limit", candidate.workspace); |
| 344 | let now = rfc3339(now_ms()); |
| 345 | match stripe.charge_saved_card(&customer, cents, &description, &key).await { |
| 346 | Ok(payment) if payment.status == "succeeded" => { |
| 347 | // A retried charge is the same payment: credited once. |
| 348 | let seen = self |
| 349 | .db |
| 350 | .prepare("SELECT id FROM ledger WHERE reference = ?") |
| 351 | .bind(&[payment.id.as_str().into()])? |
| 352 | .first::<serde_json::Value>(None) |
| 353 | .await?; |
| 354 | if seen.is_some() { |
| 355 | continue; |
| 356 | } |
| 357 | self.enter( |
| 358 | &candidate.workspace, |
| 359 | g1t_contracts::billing::EntryKind::TopUp, |
| 360 | payment.amount_received.max(cents) * 10_000, |
| 361 | &format!("Paid automatically by card, near the {} limit", dollars_plain(limit.ceiling_micros.unwrap_or_default())), |
| 362 | &payment.id, |
| 363 | None, |
| 364 | None, |
| 365 | None, |
| 366 | Some(&customer), |
| 367 | ) |
| 368 | .await?; |
| 369 | self.db |
| 370 | .prepare("UPDATE limits SET autopay_failed_at = NULL, autopay_error = NULL WHERE workspace = ?") |
| 371 | .bind(&[candidate.workspace.as_str().into()])? |
| 372 | .run() |
| 373 | .await?; |
| 374 | } |
| 375 | outcome => { |
| 376 | let error = match outcome { |
| 377 | Ok(payment) => format!("the payment is {}", payment.status.replace('_', " ")), |
| 378 | Err(error) => error.to_string().chars().take(200).collect(), |
| 379 | }; |
| 380 | self.db |
| 381 | .prepare( |
| 382 | "INSERT INTO limits (workspace, autopay_failed_at, autopay_error, updated_at) VALUES (?1, ?2, ?3, ?2) |
| 383 | ON CONFLICT (workspace) DO UPDATE SET autopay_failed_at = ?2, autopay_error = ?3, updated_at = ?2", |
| 384 | ) |
| 385 | .bind(&[candidate.workspace.as_str().into(), now.as_str().into(), error.as_str().into()])? |
| 386 | .run() |
| 387 | .await?; |
| 388 | } |
| 389 | } |
| 390 | } |
| 391 | Ok(()) |
| 392 | } |
| 393 | |
| 394 | /// Closes last month for each workspace with a card on file: charges |
| 395 | /// what it owed when the month ended. Live payments only, once per |
| 396 | /// workspace and month; a declined card stops work until it is paid. |
| 397 | /// Comped workspaces owe nothing, and enterprises are invoiced. |
| 398 | pub(crate) async fn close_months(&self) -> Result<()> { |
| 399 | let Some(stripe) = self.stripe.as_ref().filter(|stripe| stripe.live()) else { |
| 400 | return Ok(()); |
| 401 | }; |
| 402 | let now = rfc3339(now_ms()); |
| 403 | let month_start = format!("{}-01", &now[..7]); |
| 404 | let closing = previous_month(&now[..7]); |
| 405 | #[derive(Deserialize)] |
| 406 | struct Open { |
| 407 | workspace: String, |
| 408 | customer_id: String, |
| 409 | balance: Option<i64>, |
| 410 | } |
| 411 | let open = self |
| 412 | .db |
| 413 | .prepare( |
| 414 | "SELECT accounts.workspace AS workspace, accounts.customer_id AS customer_id, |
| 415 | (SELECT SUM(amount_micros) FROM ledger |
| 416 | WHERE ledger.workspace = accounts.workspace AND ledger.created_at < ?1) AS balance |
| 417 | FROM accounts |
| 418 | WHERE accounts.customer_id IS NOT NULL |
| 419 | AND NOT EXISTS (SELECT 1 FROM month_closes |
| 420 | WHERE month_closes.workspace = accounts.workspace AND month_closes.month = ?2) |
| 421 | LIMIT 20", |
| 422 | ) |
| 423 | .bind(&[month_start.as_str().into(), closing.as_str().into()])? |
| 424 | .all() |
| 425 | .await? |
| 426 | .results::<Open>()?; |
| 427 | for account in open { |
| 428 | let record = |status: &str, amount: i64, payment: Option<&str>, error: Option<&str>| { |
| 429 | self.db |
| 430 | .prepare( |
| 431 | "INSERT OR IGNORE INTO month_closes (workspace, month, status, amount_micros, payment_id, error, closed_at) |
| 432 | VALUES (?, ?, ?, ?, ?, ?, ?)", |
| 433 | ) |
| 434 | .bind(&[ |
| 435 | account.workspace.as_str().into(), |
| 436 | closing.as_str().into(), |
| 437 | status.into(), |
| 438 | (amount as f64).into(), |
| 439 | crate::optional(payment), |
| 440 | crate::optional(error), |
| 441 | now.as_str().into(), |
| 442 | ]) |
| 443 | }; |
| 444 | let payer = self.account_of(&account.workspace).await?; |
| 445 | if payer.terms.kind == TermsKind::Comped || payer.id.starts_with("ent_") { |
| 446 | record("skipped", 0, None, None)?.run().await?; |
| 447 | continue; |
| 448 | } |
| 449 | let owed = (-account.balance.unwrap_or(0)).max(0); |
| 450 | if owed < 10_000 { |
| 451 | // Under a cent: nothing worth charging. |
| 452 | record("nothing", 0, None, None)?.run().await?; |
| 453 | continue; |
| 454 | } |
| 455 | let cents = (owed + 9_999) / 10_000; |
| 456 | let key = format!("close/{}/{closing}", account.workspace); |
| 457 | let description = format!("g1t usage for {} in {closing}", account.workspace); |
| 458 | match stripe.charge_saved_card(&account.customer_id, cents, &description, &key).await { |
| 459 | Ok(payment) if payment.status == "succeeded" => { |
| 460 | let seen = self |
| 461 | .db |
| 462 | .prepare("SELECT id FROM ledger WHERE reference = ?") |
| 463 | .bind(&[payment.id.as_str().into()])? |
| 464 | .first::<serde_json::Value>(None) |
| 465 | .await?; |
| 466 | if seen.is_none() { |
| 467 | self.enter( |
| 468 | &account.workspace, |
| 469 | g1t_contracts::billing::EntryKind::TopUp, |
| 470 | payment.amount_received.max(cents) * 10_000, |
| 471 | &format!("Usage for {closing}, charged to the card on file when the month closed"), |
| 472 | &payment.id, |
| 473 | None, |
| 474 | None, |
| 475 | None, |
| 476 | Some(&account.customer_id), |
| 477 | ) |
| 478 | .await?; |
| 479 | } |
| 480 | record("paid", cents * 10_000, Some(&payment.id), None)?.run().await?; |
| 481 | } |
| 482 | outcome => { |
| 483 | let error = match outcome { |
| 484 | Ok(payment) => format!("the payment is {}", payment.status.replace('_', " ")), |
| 485 | Err(error) => error.to_string().chars().take(200).collect(), |
| 486 | }; |
| 487 | self.db |
| 488 | .prepare( |
| 489 | "INSERT INTO limits (workspace, autopay_failed_at, autopay_error, updated_at) VALUES (?1, ?2, ?3, ?2) |
| 490 | ON CONFLICT (workspace) DO UPDATE SET autopay_failed_at = ?2, autopay_error = ?3, updated_at = ?2", |
| 491 | ) |
| 492 | .bind(&[account.workspace.as_str().into(), now.as_str().into(), error.as_str().into()])? |
| 493 | .run() |
| 494 | .await?; |
| 495 | record("failed", cents * 10_000, None, Some(&error))?.run().await?; |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | Ok(()) |
| 500 | } |
| 501 | |
| 502 | /// Emails a workspace's owners as it passes 50%, 80% and 100% of its |
| 503 | /// limit, once each a month, and when its card was declined, so that |
| 504 | /// work never stops without warning. |
| 505 | pub(crate) async fn warn_limits(&self, identity: &worker::Fetcher) -> Result<()> { |
| 506 | if self.stripe.is_none() { |
| 507 | return Ok(()); |
| 508 | } |
| 509 | let now = rfc3339(now_ms()); |
| 510 | let month = &now[..7]; |
| 511 | #[derive(Deserialize)] |
| 512 | struct Candidate { |
| 513 | workspace: String, |
| 514 | } |
| 515 | let candidates = self |
| 516 | .db |
| 517 | .prepare( |
| 518 | "SELECT DISTINCT workspace FROM ledger WHERE kind = 'usage' AND created_at >= ?1 |
| 519 | UNION SELECT workspace FROM limits WHERE autopay_failed_at IS NOT NULL", |
| 520 | ) |
| 521 | .bind(&[format!("{month}-01").into()])? |
| 522 | .all() |
| 523 | .await? |
| 524 | .results::<Candidate>()?; |
| 525 | #[derive(Deserialize)] |
| 526 | struct Told { |
| 527 | warned_month: Option<String>, |
| 528 | warned_level: Option<i64>, |
| 529 | autopay_failed_at: Option<String>, |
| 530 | declined_told_at: Option<String>, |
| 531 | } |
| 532 | for Candidate { workspace } in candidates { |
| 533 | let limit = self.limit_of(&workspace).await?; |
| 534 | let told = self |
| 535 | .db |
| 536 | .prepare("SELECT warned_month, warned_level, autopay_failed_at, declined_told_at FROM limits WHERE workspace = ?") |
| 537 | .bind(&[workspace.as_str().into()])? |
| 538 | .first::<Told>(None) |
| 539 | .await?; |
| 540 | let billing = format!("https://g1t.sh/{workspace}/-/billing"); |
| 541 | |
| 542 | // A declined card, once per decline. |
| 543 | if let Some(Told { autopay_failed_at: Some(failed), declined_told_at, .. }) = &told { |
| 544 | if declined_told_at.as_deref().is_none_or(|at| at < failed.as_str()) { |
| 545 | let sent = notify( |
| 546 | identity, |
| 547 | &workspace, |
| 548 | &format!("g1t: the card for {workspace} was declined"), |
| 549 | &limit.message.clone().unwrap_or_else(|| format!("g1t could not charge the card on file for {workspace}.")), |
| 550 | "Update the card", |
| 551 | &billing, |
| 552 | ) |
| 553 | .await; |
| 554 | if sent { |
| 555 | self.db |
| 556 | .prepare("UPDATE limits SET declined_told_at = ? WHERE workspace = ?") |
| 557 | .bind(&[now.as_str().into(), workspace.as_str().into()])? |
| 558 | .run() |
| 559 | .await?; |
| 560 | } |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | let Some(ceiling) = limit.ceiling_micros.filter(|c| *c > 0) else { continue }; |
| 565 | let level = warning_level(limit.exposure_micros, ceiling); |
| 566 | let already = told |
| 567 | .as_ref() |
| 568 | .filter(|t| t.warned_month.as_deref() == Some(month)) |
| 569 | .and_then(|t| t.warned_level) |
| 570 | .unwrap_or(0); |
| 571 | if level <= already { |
| 572 | continue; |
| 573 | } |
| 574 | let (subject, intro) = match level { |
| 575 | 100 => ( |
| 576 | format!("g1t: {workspace} reached its usage limit"), |
| 577 | limit.message.clone().unwrap_or_else(|| format!("{workspace} reached its usage limit.")), |
| 578 | ), |
| 579 | _ => ( |
| 580 | format!("g1t: {workspace} has used {level}% of its usage limit"), |
| 581 | format!( |
| 582 | "{workspace} has used {} of its {} usage limit this month. At the limit its sandboxes, builds and apps stop until it pays or the month turns. With a card on file, g1t charges it as the limit nears, so work keeps going.", |
| 583 | dollars_plain(limit.exposure_micros), |
| 584 | dollars_plain(ceiling), |
| 585 | ), |
| 586 | ), |
| 587 | }; |
| 588 | if notify(identity, &workspace, &subject, &intro, "Open billing", &billing).await { |
| 589 | self.db |
| 590 | .prepare( |
| 591 | "INSERT INTO limits (workspace, warned_month, warned_level, updated_at) VALUES (?1, ?2, ?3, ?4) |
| 592 | ON CONFLICT (workspace) DO UPDATE SET warned_month = ?2, warned_level = ?3, updated_at = ?4", |
| 593 | ) |
| 594 | .bind(&[workspace.as_str().into(), month.into(), (level as f64).into(), now.as_str().into()])? |
| 595 | .run() |
| 596 | .await?; |
| 597 | } |
| 598 | } |
| 599 | Ok(()) |
| 600 | } |
| 601 | |
| 602 | pub(crate) async fn check_limit(&self, a: CheckLimitArgs) -> Result<Outcome<Limit>> { |
| 603 | Ok(Outcome::Ok(self.limit_of(&a.workspace).await?)) |
| 604 | } |
| 605 | |
| 606 | pub(crate) async fn set_spend_limit(&self, a: SetSpendLimitArgs) -> Result<Outcome<Limit>> { |
| 607 | let workspace = a.workspace.to_lowercase(); |
| 608 | if a.actor.role_in(&workspace) != Some(Role::Owner) { |
| 609 | return Ok(Outcome::fail( |
| 610 | FailureCode::Forbidden, |
| 611 | "Only an owner can set the workspace's spend limit.", |
| 612 | )); |
| 613 | } |
| 614 | if a.spend_limit_micros.is_some_and(|limit| limit < 0) { |
| 615 | return Ok(Outcome::fail(FailureCode::Invalid, "A spend limit cannot be negative.")); |
| 616 | } |
| 617 | let limit = a.spend_limit_micros.map_or(JsValue::NULL, |limit| (limit as f64).into()); |
| 618 | self.db |
| 619 | .prepare( |
| 620 | "INSERT INTO limits (workspace, spend_limit_micros, updated_at) VALUES (?1, ?2, ?3) |
| 621 | ON CONFLICT (workspace) DO UPDATE SET spend_limit_micros = ?2, updated_at = ?3", |
| 622 | ) |
| 623 | .bind(&[workspace.as_str().into(), limit, rfc3339(now_ms()).into()])? |
| 624 | .run() |
| 625 | .await?; |
| 626 | Ok(Outcome::Ok(self.limit_of(&workspace).await?)) |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | /// Which warning a workspace has reached: 100, 80, 50 or none (0). |
| 631 | pub(crate) fn warning_level(exposure: i64, ceiling: i64) -> i64 { |
| 632 | if exposure >= ceiling { |
| 633 | 100 |
| 634 | } else if exposure * 5 >= ceiling * 4 { |
| 635 | 80 |
| 636 | } else if exposure * 2 >= ceiling { |
| 637 | 50 |
| 638 | } else { |
| 639 | 0 |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | /// Emails the workspace's owners through identity. False if nothing was sent. |
| 644 | async fn notify(identity: &worker::Fetcher, workspace: &str, subject: &str, intro: &str, action: &str, link: &str) -> bool { |
| 645 | let args = g1t_contracts::identity::NotifyOwnersArgs { |
| 646 | workspace: workspace.to_owned(), |
| 647 | subject: subject.to_owned(), |
| 648 | intro: intro.to_owned(), |
| 649 | action: action.to_owned(), |
| 650 | link: link.to_owned(), |
| 651 | footer: "You get this because you own this workspace on g1t. Usage limits are explained at https://docs.g1t.sh/guides/usage-and-billing/#usage-limits".to_owned(), |
| 652 | }; |
| 653 | match g1t_kit::call::<_, u32>(identity, "notify_owners", &args).await { |
| 654 | Ok(sent) => sent > 0, |
| 655 | Err(error) => { |
| 656 | worker::console_error!("could not tell {workspace}'s owners: {error}"); |
| 657 | false |
| 658 | } |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | /// `2026-09` for `2026-10`, and `2025-12` for `2026-01`. |
| 663 | pub(crate) fn previous_month(month: &str) -> String { |
| 664 | let year: i32 = month[..4].parse().unwrap_or(1970); |
| 665 | let number: u32 = month[5..7].parse().unwrap_or(1); |
| 666 | if number == 1 { |
| 667 | format!("{}-12", year - 1) |
| 668 | } else { |
| 669 | format!("{year}-{:02}", number - 1) |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | #[cfg(test)] |
| 674 | mod tests { |
| 675 | use super::*; |
| 676 | |
| 677 | #[test] |
| 678 | fn warnings_come_at_half_four_fifths_and_the_limit() { |
| 679 | assert_eq!(warning_level(0, 300), 0); |
| 680 | assert_eq!(warning_level(149, 300), 0); |
| 681 | assert_eq!(warning_level(150, 300), 50); |
| 682 | assert_eq!(warning_level(240, 300), 80); |
| 683 | assert_eq!(warning_level(300, 300), 100); |
| 684 | } |
| 685 | |
| 686 | #[test] |
| 687 | fn the_month_before_wraps_the_year() { |
| 688 | assert_eq!(previous_month("2026-10"), "2026-09"); |
| 689 | assert_eq!(previous_month("2026-01"), "2025-12"); |
| 690 | } |
| 691 | |
| 692 | fn ceilings() -> Ceilings { |
| 693 | Ceilings { new: 3_000_000, paid_min: 25_000_000, paid_max: 1_000_000_000 } |
| 694 | } |
| 695 | |
| 696 | #[test] |
| 697 | fn trust_grows_with_what_was_paid_within_bounds() { |
| 698 | assert_eq!(ceilings().for_paid(5_000_000), 25_000_000); |
| 699 | assert_eq!(ceilings().for_paid(100_000_000), 200_000_000); |
| 700 | assert_eq!(ceilings().for_paid(10_000_000_000), 1_000_000_000); |
| 701 | } |
| 702 | |
| 703 | #[test] |
| 704 | fn work_warns_at_eighty_percent_and_stops_at_the_ceiling() { |
| 705 | assert_eq!(state(0, Some(100)), LimitState::Ok); |
| 706 | assert_eq!(state(79, Some(100)), LimitState::Ok); |
| 707 | assert_eq!(state(80, Some(100)), LimitState::Warning); |
| 708 | assert_eq!(state(100, Some(100)), LimitState::Stopped); |
| 709 | assert_eq!(state(1_000_000, None), LimitState::Ok); |
| 710 | } |
| 711 | } |