| 1 | //! Prepaid AI credit: what Agent and AI Gateway usage draws on, bought in |
| 2 | //! advance so g1t never fronts a model's cost. |
| 3 | //! |
| 4 | //! - **Buying.** An owner buys AI credit on Stripe's page: one payment by |
| 5 | //! card, $10 to $1,000, with Stripe's card fee as its own line when the |
| 6 | //! `card_fee` cost setting is on (`card_fee_cents`, a gross-up of the |
| 7 | //! price book's `card_fee_percent` and `card_fee_fixed`). The card is |
| 8 | //! kept for auto-reload. The credit is entered once, whichever comes |
| 9 | //! first: the person coming back (`confirm_ai_credit`) or Stripe's |
| 10 | //! `checkout.session.completed` (`webhooks.rs`). Both claim the same |
| 11 | //! `checkouts` row, and the grant's id is the page's id, so a payment is |
| 12 | //! credited exactly once. |
| 13 | //! - **What it is.** A `credit_grants` row of kind `purchased`, scope |
| 14 | //! `models`, source `purchase`, expiring a year after purchase, and its |
| 15 | //! ledger line (a payment: its reference is Stripe's id, never `crd…`). |
| 16 | //! Model usage draws on it before anything else (`grants::replay`), and |
| 17 | //! it counts as money paid, never as given. |
| 18 | //! - **Auto-reload.** Off by default. When AI credit falls below the |
| 19 | //! threshold, the saved card is charged off-session to bring it back to |
| 20 | //! the target, at most the monthly maximum. Each attempt has its own |
| 21 | //! idempotency key (`ai_reloads.id`), so a retry is the same payment. A |
| 22 | //! failed charge turns auto-reload off and tells the owners. |
| 23 | //! - **At $0.** A workspace on the plan with no AI credit and none of its |
| 24 | //! included usage left cannot start a run on g1t's models: `start_run` |
| 25 | //! refuses with what to do. Auto-reload, when on, is tried first. A 100% |
| 26 | //! discount (Flagon) pays for everything, so nothing is needed; an |
| 27 | //! enterprise is invoiced for models after use. |
| 28 | //! - **Once on upgrading.** A workspace that starts the paid plan is given |
| 29 | //! $5 of AI credit once (promotional: given, not revenue), expiring in a |
| 30 | //! year. |
| 31 | //! - **The agent rate.** Every agent run's tokens (input, output and |
| 32 | //! cached, as the model proxy counts them) are charged at the price |
| 33 | //! book's `agent_tokens` price per million, on a line of their own |
| 34 | //! (`<run>/agent`), on top of the model at the provider's price |
| 35 | //! (`agent_models`, no markup). |
| 36 | |
| 37 | use g1t_contracts::billing::{ |
| 38 | AccountArgs, AiCredit, AiReload, BuyAiCreditArgs, CardFee, Checkout, ConfirmAiCreditArgs, CreditKind, EntryKind, PlanKind, |
| 39 | RunTokens, SetAiReloadArgs, MICROS_PER_DOLLAR, |
| 40 | }; |
| 41 | use g1t_contracts::time::rfc3339; |
| 42 | use g1t_contracts::{FailureCode, Outcome, Role}; |
| 43 | use g1t_kit::now_ms; |
| 44 | use serde::Deserialize; |
| 45 | use worker::Result; |
| 46 | |
| 47 | use crate::features::cents; |
| 48 | use crate::{Billing, RunRow, members_only, optional}; |
| 49 | |
| 50 | /// What a checkout row for AI credit is marked with. |
| 51 | pub(crate) const AI_CREDIT: &str = "ai_credit"; |
| 52 | /// The amounts offered, in cents, and the bounds of a custom one. |
| 53 | pub(crate) const PRESETS_CENTS: [u32; 4] = [1_000, 2_500, 5_000, 10_000]; |
| 54 | pub(crate) const MIN_CENTS: u32 = 1_000; |
| 55 | pub(crate) const MAX_CENTS: u32 = 100_000; |
| 56 | /// Bought credit lasts a year. |
| 57 | pub(crate) const EXPIRES_DAYS: u64 = 365; |
| 58 | /// Given once, on starting the paid plan. |
| 59 | pub(crate) const UPGRADE_CREDIT_MICROS: i64 = 5_000_000; |
| 60 | /// Auto-reload's bounds: a reload of at least $10, a target of at most |
| 61 | /// $1,000, and at most $10,000 a month. |
| 62 | const MIN_RELOAD_MICROS: i64 = 10 * MICROS_PER_DOLLAR; |
| 63 | const MAX_TARGET_MICROS: i64 = 1_000 * MICROS_PER_DOLLAR; |
| 64 | const MAX_MONTHLY_MICROS: i64 = 10_000 * MICROS_PER_DOLLAR; |
| 65 | const DAY_MS: u64 = 24 * 60 * 60 * 1000; |
| 66 | |
| 67 | // --------------------------------------------------------------------- |
| 68 | // The arithmetic, apart from the database so it can be tested. |
| 69 | // --------------------------------------------------------------------- |
| 70 | |
| 71 | /// Whether an amount of AI credit can be bought, in cents. |
| 72 | pub(crate) fn amount_ok(cents: u32) -> std::result::Result<(), String> { |
| 73 | if (MIN_CENTS..=MAX_CENTS).contains(¢s) && cents.is_multiple_of(100) { |
| 74 | Ok(()) |
| 75 | } else { |
| 76 | Err(format!("Buy between ${} and ${} of AI credit, in whole dollars.", MIN_CENTS / 100, crate::group(MAX_CENTS / 100))) |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | /// The card fee on `credit_cents`, so that what is left after Stripe's fee |
| 81 | /// is the credit: the total is `(credit + fixed) / (1 − percent)`, rounded |
| 82 | /// up to the cent. None when the fee is off. |
| 83 | pub(crate) fn card_fee_cents(credit_cents: u32, fee: &CardFee) -> u32 { |
| 84 | if !fee.on || credit_cents == 0 { |
| 85 | return 0; |
| 86 | } |
| 87 | let rate = fee.percent_micros / MICROS_PER_DOLLAR as f64; |
| 88 | if !(0.0..0.5).contains(&rate) { |
| 89 | return 0; |
| 90 | } |
| 91 | let total = ((f64::from(credit_cents) + f64::from(fee.fixed_cents)) / (1.0 - rate)).ceil(); |
| 92 | (total as u32).saturating_sub(credit_cents) |
| 93 | } |
| 94 | |
| 95 | /// What auto-reload should buy now, if anything: enough to bring the |
| 96 | /// credit from `balance` back to the target, in whole dollars, within |
| 97 | /// what is left of the monthly maximum, and never less than $10. |
| 98 | pub(crate) fn reload_amount(reload: &AiReload, balance: i64, reloaded_this_month: i64) -> Option<i64> { |
| 99 | if !reload.enabled || reload.failed_at.is_some() || balance >= reload.threshold_micros { |
| 100 | return None; |
| 101 | } |
| 102 | let wanted = (reload.target_micros - balance).max(MIN_RELOAD_MICROS); |
| 103 | let wanted = (wanted + MICROS_PER_DOLLAR - 1) / MICROS_PER_DOLLAR * MICROS_PER_DOLLAR; |
| 104 | let room = (reload.monthly_max_micros - reloaded_this_month).max(0) / MICROS_PER_DOLLAR * MICROS_PER_DOLLAR; |
| 105 | let amount = wanted.min(room); |
| 106 | (amount >= MIN_RELOAD_MICROS).then_some(amount) |
| 107 | } |
| 108 | |
| 109 | /// What is wrong with auto-reload's settings, if anything. |
| 110 | pub(crate) fn reload_invalid(threshold: i64, target: i64, monthly_max: i64) -> Option<&'static str> { |
| 111 | if threshold < 0 || target <= 0 || monthly_max <= 0 { |
| 112 | return Some("Amounts are in dollars, more than $0."); |
| 113 | } |
| 114 | if target < threshold + MIN_RELOAD_MICROS { |
| 115 | return Some("Reload to at least $10 more than the amount it reloads below."); |
| 116 | } |
| 117 | if target > MAX_TARGET_MICROS { |
| 118 | return Some("Reload to at most $1,000."); |
| 119 | } |
| 120 | if monthly_max < target - threshold { |
| 121 | return Some("The monthly maximum has to cover at least one reload."); |
| 122 | } |
| 123 | if monthly_max > MAX_MONTHLY_MICROS { |
| 124 | return Some("The monthly maximum is at most $10,000."); |
| 125 | } |
| 126 | if [threshold, target, monthly_max].iter().any(|m| m % MICROS_PER_DOLLAR != 0) { |
| 127 | return Some("Use whole dollars."); |
| 128 | } |
| 129 | None |
| 130 | } |
| 131 | |
| 132 | /// Whether a purchase's page was paid for what was asked: Stripe says it |
| 133 | /// is paid, and what was paid covers the credit (the fee is Stripe's). |
| 134 | pub(crate) fn purchase_paid(payment_status: &str, amount_total: Option<u32>, credit_cents: u32) -> std::result::Result<(), String> { |
| 135 | if payment_status != "paid" { |
| 136 | return Err("The payment is not finished yet. It is credited as soon as Stripe says it was paid.".to_owned()); |
| 137 | } |
| 138 | if amount_total.unwrap_or(0) < credit_cents { |
| 139 | return Err("Stripe says less was paid than the credit asked for; nothing was credited. Write to support@g1t.sh.".to_owned()); |
| 140 | } |
| 141 | Ok(()) |
| 142 | } |
| 143 | |
| 144 | /// The id of the AI credit given for starting the plan: one per workspace, |
| 145 | /// so however often the plan is recorded, it is given once. |
| 146 | pub(crate) fn upgrade_reference(workspace: &str) -> String { |
| 147 | format!("crd_upgrade_{}", workspace.to_lowercase()) |
| 148 | } |
| 149 | |
| 150 | /// The agent rate on `tokens`, at `per_million` micros a million, rounded |
| 151 | /// up to a whole millionth of a dollar. |
| 152 | pub(crate) fn agent_rate_micros(tokens: u64, per_million: f64) -> i64 { |
| 153 | if tokens == 0 || !per_million.is_finite() || per_million <= 0.0 { |
| 154 | return 0; |
| 155 | } |
| 156 | (tokens as f64 * per_million / 1_000_000.0).ceil() as i64 |
| 157 | } |
| 158 | |
| 159 | /// Whether a workspace's runs on g1t's models need AI credit (or included |
| 160 | /// usage) to start: on the plan, paying full or part price. A 100% |
| 161 | /// discount pays for all of it; an enterprise is invoiced after use; a |
| 162 | /// free workspace runs on its trial, which has its own limits. |
| 163 | pub(crate) fn needs_credit(plan: PlanKind) -> bool { |
| 164 | plan == PlanKind::Paid |
| 165 | } |
| 166 | |
| 167 | /// The refusal at $0. |
| 168 | pub(crate) fn out_of_credit_message(workspace: &str, reload_failed: bool) -> String { |
| 169 | let reload = if reload_failed { " Auto-reload was turned off after its last charge failed." } else { "" }; |
| 170 | format!( |
| 171 | "The {workspace} workspace is out of AI credit and has used this month's included usage, so g1t does not start new runs on its models.{reload} An owner can buy AI credit or turn on auto-reload at /{workspace}/-/billing#ai-credit." |
| 172 | ) |
| 173 | } |
| 174 | |
| 175 | #[derive(Deserialize)] |
| 176 | struct ReloadRow { |
| 177 | enabled: i64, |
| 178 | threshold_micros: i64, |
| 179 | target_micros: i64, |
| 180 | monthly_max_micros: i64, |
| 181 | failed_at: Option<String>, |
| 182 | error: Option<String>, |
| 183 | } |
| 184 | |
| 185 | #[derive(Deserialize)] |
| 186 | struct Sum { |
| 187 | micros: Option<f64>, |
| 188 | } |
| 189 | |
| 190 | #[derive(Deserialize)] |
| 191 | struct Open { |
| 192 | workspace: String, |
| 193 | created_by: String, |
| 194 | amount_cents: u32, |
| 195 | fee_cents: Option<u32>, |
| 196 | } |
| 197 | |
| 198 | impl Billing { |
| 199 | // --- The price book ---------------------------------------------------- |
| 200 | |
| 201 | /// The card fee, as the price book and the `card_fee` setting have it. |
| 202 | pub(crate) async fn card_fee(&self) -> Result<CardFee> { |
| 203 | #[derive(Deserialize)] |
| 204 | struct Row { |
| 205 | value: String, |
| 206 | } |
| 207 | let on = self |
| 208 | .db |
| 209 | .prepare("SELECT value FROM cost_settings WHERE key = 'card_fee'") |
| 210 | .first::<Row>(None) |
| 211 | .await? |
| 212 | .is_none_or(|row| row.value.trim() != "off"); |
| 213 | let percent = self.price("card_fee_percent").await?.map_or(29_000.0, |(_, price)| price); |
| 214 | let fixed = self.price("card_fee_fixed").await?.map_or(300_000.0, |(_, price)| price); |
| 215 | Ok(CardFee { on, percent_micros: percent, fixed_cents: (fixed / 10_000.0).round().max(0.0) as u32 }) |
| 216 | } |
| 217 | |
| 218 | /// The agent rate per million tokens, at price. |
| 219 | pub(crate) async fn agent_rate(&self) -> Result<f64> { |
| 220 | Ok(self.price("agent_tokens").await?.map_or(0.0, |(_, price)| price)) |
| 221 | } |
| 222 | |
| 223 | /// The markup on a price-book meter, in percent. |
| 224 | async fn markup_of(&self, meter: &str) -> Result<Option<u32>> { |
| 225 | #[derive(Deserialize)] |
| 226 | struct Row { |
| 227 | markup_percent: u32, |
| 228 | } |
| 229 | Ok(self |
| 230 | .db |
| 231 | .prepare("SELECT markup_percent FROM prices WHERE meter = ?") |
| 232 | .bind(&[meter.into()])? |
| 233 | .first::<Row>(None) |
| 234 | .await? |
| 235 | .map(|row| row.markup_percent)) |
| 236 | } |
| 237 | |
| 238 | /// The markup on a model's provider price for agent runs: the price |
| 239 | /// book's `agent_models` (0 from 2026-10-08), or `MARGIN_PERCENT` |
| 240 | /// where the price book has no row. |
| 241 | pub(crate) async fn model_markup(&self) -> Result<u32> { |
| 242 | Ok(self.markup_of("agent_models").await?.unwrap_or(self.margin_percent)) |
| 243 | } |
| 244 | |
| 245 | /// The markup on AI Gateway's provider price: 0 while it is in beta. |
| 246 | pub(crate) async fn gateway_markup(&self) -> Result<u32> { |
| 247 | Ok(self.markup_of("gateway_models").await?.unwrap_or(0)) |
| 248 | } |
| 249 | |
| 250 | // --- Balances ------------------------------------------------------------ |
| 251 | |
| 252 | /// AI credit left: the open grants scoped to models, by kind. |
| 253 | pub(crate) async fn ai_balance(&self, workspace: &str) -> Result<(i64, i64, i64)> { |
| 254 | let credits = self.credits_of(workspace).await?; |
| 255 | let models: Vec<_> = credits.grants.iter().filter(|g| g.scope == "models").collect(); |
| 256 | let purchased = models.iter().filter(|g| g.kind == CreditKind::Purchased).map(|g| g.left_micros).sum(); |
| 257 | let given = models.iter().filter(|g| g.kind != CreditKind::Purchased).map(|g| g.left_micros).sum(); |
| 258 | Ok((purchased + given, purchased, given)) |
| 259 | } |
| 260 | |
| 261 | /// What is owed now, with the balance `balance`: credit scoped to |
| 262 | /// models is not money for anything else, so what is left of it is |
| 263 | /// owed on top of a balance it props up. |
| 264 | pub(crate) async fn owed_with(&self, workspace: &str, balance: i64) -> Result<i64> { |
| 265 | let (left, _, _) = self.ai_balance(workspace).await?; |
| 266 | Ok((left - balance).max(0)) |
| 267 | } |
| 268 | |
| 269 | async fn reload_settings(&self, workspace: &str) -> Result<AiReload> { |
| 270 | let row = self |
| 271 | .db |
| 272 | .prepare("SELECT enabled, threshold_micros, target_micros, monthly_max_micros, failed_at, error FROM ai_reload WHERE workspace = ?") |
| 273 | .bind(&[workspace.into()])? |
| 274 | .first::<ReloadRow>(None) |
| 275 | .await?; |
| 276 | let reloaded = self.reloaded_this_month(workspace).await?; |
| 277 | Ok(match row { |
| 278 | Some(row) => AiReload { |
| 279 | enabled: row.enabled != 0, |
| 280 | threshold_micros: row.threshold_micros, |
| 281 | target_micros: row.target_micros, |
| 282 | monthly_max_micros: row.monthly_max_micros, |
| 283 | reloaded_micros: reloaded, |
| 284 | failed_at: row.failed_at, |
| 285 | error: row.error, |
| 286 | }, |
| 287 | // The suggestion the form starts from: below $10, back to $25, |
| 288 | // at most $100 a month. |
| 289 | None => AiReload { |
| 290 | enabled: false, |
| 291 | threshold_micros: 10 * MICROS_PER_DOLLAR, |
| 292 | target_micros: 25 * MICROS_PER_DOLLAR, |
| 293 | monthly_max_micros: 100 * MICROS_PER_DOLLAR, |
| 294 | reloaded_micros: reloaded, |
| 295 | failed_at: None, |
| 296 | error: None, |
| 297 | }, |
| 298 | }) |
| 299 | } |
| 300 | |
| 301 | async fn reloaded_this_month(&self, workspace: &str) -> Result<i64> { |
| 302 | let month = &rfc3339(now_ms())[..7]; |
| 303 | Ok(self |
| 304 | .db |
| 305 | .prepare("SELECT SUM(amount_micros) AS micros FROM ai_reloads WHERE workspace = ? AND month = ? AND status IN ('paid', 'pending')") |
| 306 | .bind(&[workspace.into(), month.into()])? |
| 307 | .first::<Sum>(None) |
| 308 | .await? |
| 309 | .and_then(|s| s.micros) |
| 310 | .unwrap_or(0.0) as i64) |
| 311 | } |
| 312 | |
| 313 | /// What the plan's included usage has left this month, on the plan. |
| 314 | async fn included_left(&self, workspace: &str) -> Result<i64> { |
| 315 | let month = crate::credits::month_of(&rfc3339(now_ms())); |
| 316 | let used = self.allowance_used("plan_credit", workspace, &month).await?; |
| 317 | Ok(crate::credits::left(self.plans.plan_included_micros, used)) |
| 318 | } |
| 319 | |
| 320 | // --- The page -------------------------------------------------------------- |
| 321 | |
| 322 | /// `ai_credit`: the workspace's AI credit, for its members. |
| 323 | pub(crate) async fn ai_credit(&self, a: AccountArgs) -> Result<Outcome<AiCredit>> { |
| 324 | let workspace = a.workspace.to_lowercase(); |
| 325 | if !a.viewer.is_some_and(|viewer| viewer.is_member(&workspace)) { |
| 326 | return Ok(members_only()); |
| 327 | } |
| 328 | Ok(Outcome::Ok(self.ai_credit_of(&workspace).await?)) |
| 329 | } |
| 330 | |
| 331 | pub(crate) async fn ai_credit_of(&self, workspace: &str) -> Result<AiCredit> { |
| 332 | let account = self.account_of(workspace).await?; |
| 333 | let plan = self.plan_kind_for(workspace, &account).await?; |
| 334 | let credits = self.credits_of(workspace).await?; |
| 335 | let grants: Vec<_> = credits.grants.into_iter().filter(|g| g.scope == "models").collect(); |
| 336 | let purchased: i64 = grants.iter().filter(|g| g.kind == CreditKind::Purchased).map(|g| g.left_micros).sum(); |
| 337 | let given: i64 = grants.iter().filter(|g| g.kind != CreditKind::Purchased).map(|g| g.left_micros).sum(); |
| 338 | let balance = purchased + given; |
| 339 | let reload = self.reload_settings(workspace).await?; |
| 340 | let blocked = self.stripe.is_some() |
| 341 | && !self.free |
| 342 | && needs_credit(plan) |
| 343 | && balance <= 0 |
| 344 | && self.included_left(workspace).await? <= 0; |
| 345 | Ok(AiCredit { |
| 346 | balance_micros: balance, |
| 347 | purchased_micros: purchased, |
| 348 | given_micros: given, |
| 349 | grants, |
| 350 | free_via_discount: account.terms.full_discount(), |
| 351 | postpaid: plan == PlanKind::Enterprise, |
| 352 | blocked, |
| 353 | can_buy: self.stripe.is_some() && plan == PlanKind::Paid, |
| 354 | presets_cents: PRESETS_CENTS.to_vec(), |
| 355 | min_cents: MIN_CENTS, |
| 356 | max_cents: MAX_CENTS, |
| 357 | card_fee: self.card_fee().await?, |
| 358 | reload, |
| 359 | agent_rate_micros: self.agent_rate().await?, |
| 360 | model_markup_percent: self.model_markup().await?, |
| 361 | gateway_markup_percent: self.gateway_markup().await?, |
| 362 | upgrade_credit_micros: UPGRADE_CREDIT_MICROS, |
| 363 | expires_days: EXPIRES_DAYS as u32, |
| 364 | }) |
| 365 | } |
| 366 | |
| 367 | // --- Buying -------------------------------------------------------------- |
| 368 | |
| 369 | /// `buy_ai_credit`: Stripe's page for a purchase. |
| 370 | pub(crate) async fn buy_ai_credit(&self, a: BuyAiCreditArgs) -> Result<Outcome<Checkout>> { |
| 371 | let workspace = a.workspace.to_lowercase(); |
| 372 | if a.actor.role_in(&workspace) != Some(Role::Owner) { |
| 373 | return Ok(Outcome::fail(FailureCode::Forbidden, "Only an owner can buy AI credit for the workspace.")); |
| 374 | } |
| 375 | let Some(stripe) = &self.stripe else { |
| 376 | return Ok(Outcome::fail(FailureCode::Conflict, "Payments are not set up on this g1t.")); |
| 377 | }; |
| 378 | if let Err(why) = amount_ok(a.amount_cents) { |
| 379 | return Ok(Outcome::fail(FailureCode::Invalid, why)); |
| 380 | } |
| 381 | let account = self.account_of(&workspace).await?; |
| 382 | if account.terms.full_discount() { |
| 383 | return Ok(Outcome::fail(FailureCode::Conflict, format!("{workspace}'s AI usage is free under its discount: there is nothing to buy."))); |
| 384 | } |
| 385 | match self.plan_kind_for(&workspace, &account).await? { |
| 386 | PlanKind::Paid => {} |
| 387 | PlanKind::Enterprise => { |
| 388 | return Ok(Outcome::fail(FailureCode::Conflict, format!("{workspace} is invoiced for AI usage after use, through its enterprise."))); |
| 389 | } |
| 390 | _ => { |
| 391 | return Ok(Outcome::fail(FailureCode::PaymentRequired, format!("AI credit is for workspaces on the g1t plan. Start the plan for {workspace} first; it comes with $5 of AI credit."))); |
| 392 | } |
| 393 | } |
| 394 | let fee = card_fee_cents(a.amount_cents, &self.card_fee().await?); |
| 395 | let customer = self.row(&workspace).await?.and_then(|row| row.customer_id); |
| 396 | let purchase = |customer| crate::stripe::CreditPurchase { |
| 397 | workspace: &workspace, |
| 398 | credit_cents: a.amount_cents, |
| 399 | fee_cents: fee, |
| 400 | customer, |
| 401 | return_url: &a.return_url, |
| 402 | }; |
| 403 | let started = match stripe.start_credit_checkout(&purchase(customer.as_deref())).await { |
| 404 | Err(error) if customer.is_some() && crate::stripe::is_missing(&error) => { |
| 405 | self.forget_customer(&workspace).await?; |
| 406 | stripe.start_credit_checkout(&purchase(None)).await |
| 407 | } |
| 408 | other => other, |
| 409 | }; |
| 410 | self.page_opened(started, &workspace, a.amount_cents, fee, &a.actor.username, Some(AI_CREDIT)).await |
| 411 | } |
| 412 | |
| 413 | /// `confirm_ai_credit`: back from Stripe's page. |
| 414 | pub(crate) async fn confirm_ai_credit(&self, a: ConfirmAiCreditArgs) -> Result<Outcome<AiCredit>> { |
| 415 | let workspace = a.workspace.to_lowercase(); |
| 416 | if !a.viewer.is_some_and(|viewer| viewer.is_member(&workspace)) { |
| 417 | return Ok(members_only()); |
| 418 | } |
| 419 | let mine = self |
| 420 | .db |
| 421 | .prepare("SELECT workspace FROM checkouts WHERE id = ? AND workspace = ? AND feature = ?") |
| 422 | .bind(&[a.session.as_str().into(), workspace.as_str().into(), AI_CREDIT.into()])? |
| 423 | .first::<serde_json::Value>(None) |
| 424 | .await?; |
| 425 | if mine.is_some() { |
| 426 | match self.settle_ai_credit(&a.session).await { |
| 427 | Ok(Ok(_)) => {} |
| 428 | Ok(Err(why)) => return Ok(Outcome::fail(FailureCode::Conflict, why)), |
| 429 | Err(error) => return Ok(Outcome::fail(FailureCode::Conflict, crate::stripe::friendly(&error))), |
| 430 | } |
| 431 | } |
| 432 | Ok(Outcome::Ok(self.ai_credit_of(&workspace).await?)) |
| 433 | } |
| 434 | |
| 435 | /// Credits a purchase whose page is paid, once. What happened, or why |
| 436 | /// it was not credited (yet). |
| 437 | pub(crate) async fn settle_ai_credit(&self, session_id: &str) -> Result<std::result::Result<String, String>> { |
| 438 | let Some(open) = self |
| 439 | .db |
| 440 | .prepare("SELECT workspace, created_by, amount_cents, fee_cents FROM checkouts WHERE id = ? AND feature = ? AND status = 'open'") |
| 441 | .bind(&[session_id.into(), AI_CREDIT.into()])? |
| 442 | .first::<Open>(None) |
| 443 | .await? |
| 444 | else { |
| 445 | return Ok(Ok("ignored: already credited or not AI credit".to_owned())); |
| 446 | }; |
| 447 | let Some(stripe) = &self.stripe else { return Ok(Ok("ignored: payments off".to_owned())) }; |
| 448 | let session = stripe.session(session_id).await?; |
| 449 | if let Err(why) = purchase_paid(&session.payment_status, session.amount_total, open.amount_cents) { |
| 450 | return Ok(Err(why)); |
| 451 | } |
| 452 | let claimed = self |
| 453 | .db |
| 454 | .prepare("UPDATE checkouts SET status = 'paid' WHERE id = ? AND status = 'open' RETURNING id") |
| 455 | .bind(&[session_id.into()])? |
| 456 | .first::<serde_json::Value>(None) |
| 457 | .await?; |
| 458 | if claimed.is_none() { |
| 459 | return Ok(Ok("ignored: credited meanwhile".to_owned())); |
| 460 | } |
| 461 | let micros = i64::from(open.amount_cents) * 10_000; |
| 462 | let fee = i64::from(open.fee_cents.unwrap_or(0)) * 10_000; |
| 463 | self.grant_purchased(&open.workspace, session_id, micros, fee, &open.created_by, session.customer.as_deref()) |
| 464 | .await?; |
| 465 | let extras = crate::tax::Extras { tax_cents: session.tax_cents(), fee_cents: fee / 10_000 }; |
| 466 | self.record_extras(&open.workspace, session_id, session.payment_intent.as_deref(), extras, None).await?; |
| 467 | Ok(Ok(format!("{}: {} of AI credit bought", open.workspace, cents(micros)))) |
| 468 | } |
| 469 | |
| 470 | /// Enters bought AI credit: its grant and its ledger line, once for |
| 471 | /// `reference` (Stripe's id for the payment). |
| 472 | pub(crate) async fn grant_purchased( |
| 473 | &self, |
| 474 | workspace: &str, |
| 475 | reference: &str, |
| 476 | micros: i64, |
| 477 | fee_micros: i64, |
| 478 | by: &str, |
| 479 | customer: Option<&str>, |
| 480 | ) -> Result<bool> { |
| 481 | let now = now_ms(); |
| 482 | let expires = rfc3339(now + EXPIRES_DAYS * DAY_MS); |
| 483 | let fee = if fee_micros > 0 { format!(" (card fee {} paid to Stripe)", cents(fee_micros)) } else { String::new() }; |
| 484 | let note = format!("AI credit bought{fee}"); |
| 485 | let inserted = self |
| 486 | .db |
| 487 | .prepare( |
| 488 | "INSERT OR IGNORE INTO credit_grants (id, workspace, kind, scope, source, amount_micros, note, expires_at, created_by, created_at) |
| 489 | VALUES (?, ?, 'purchased', 'models', 'purchase', ?, ?, ?, ?, ?) RETURNING id", |
| 490 | ) |
| 491 | .bind(&[ |
| 492 | reference.into(), |
| 493 | workspace.into(), |
| 494 | (micros as f64).into(), |
| 495 | note.as_str().into(), |
| 496 | expires.as_str().into(), |
| 497 | by.into(), |
| 498 | rfc3339(now).into(), |
| 499 | ])? |
| 500 | .first::<serde_json::Value>(None) |
| 501 | .await?; |
| 502 | if inserted.is_none() { |
| 503 | return Ok(false); |
| 504 | } |
| 505 | let description = format!("AI credit bought: {}, until {}", cents(micros), &expires[..10]); |
| 506 | self.enter(workspace, EntryKind::TopUp, micros, &description, reference, None, None, Some(by), customer).await?; |
| 507 | self.db |
| 508 | .prepare("UPDATE ledger SET credit_kind = 'purchased' WHERE reference = ?") |
| 509 | .bind(&[reference.into()])? |
| 510 | .run() |
| 511 | .await?; |
| 512 | let account = self.account_of(workspace).await?; |
| 513 | self.audit(&account.id, "ai_credit", &format!("{workspace}: {} of AI credit bought{fee}", cents(micros)), by).await?; |
| 514 | Ok(true) |
| 515 | } |
| 516 | |
| 517 | /// The $5 of AI credit a workspace gets once, on starting the paid |
| 518 | /// plan. Promotional: given, not revenue. Never twice, and never for a |
| 519 | /// workspace whose discount pays for everything anyway. |
| 520 | pub(crate) async fn grant_upgrade_credit(&self, workspace: &str) -> Result<()> { |
| 521 | let workspace = workspace.to_lowercase(); |
| 522 | if self.terms_of(&workspace).await?.full_discount() { |
| 523 | return Ok(()); |
| 524 | } |
| 525 | let reference = upgrade_reference(&workspace); |
| 526 | let now = now_ms(); |
| 527 | let expires = rfc3339(now + EXPIRES_DAYS * DAY_MS); |
| 528 | let inserted = self |
| 529 | .db |
| 530 | .prepare( |
| 531 | "INSERT OR IGNORE INTO credit_grants (id, workspace, kind, scope, source, amount_micros, note, expires_at, created_by, created_at) |
| 532 | VALUES (?, ?, 'promotional', 'models', 'upgrade', ?, 'AI credit for starting the g1t plan', ?, 'g1t', ?) RETURNING id", |
| 533 | ) |
| 534 | .bind(&[ |
| 535 | reference.as_str().into(), |
| 536 | workspace.as_str().into(), |
| 537 | (UPGRADE_CREDIT_MICROS as f64).into(), |
| 538 | expires.as_str().into(), |
| 539 | rfc3339(now).into(), |
| 540 | ])? |
| 541 | .first::<serde_json::Value>(None) |
| 542 | .await?; |
| 543 | if inserted.is_none() { |
| 544 | return Ok(()); |
| 545 | } |
| 546 | let description = format!("Credit from g1t (promotional, until {}): AI credit for starting the g1t plan", &expires[..10]); |
| 547 | self.enter(&workspace, EntryKind::TopUp, UPGRADE_CREDIT_MICROS, &description, &reference, None, None, Some("g1t"), None).await?; |
| 548 | self.db |
| 549 | .prepare("UPDATE ledger SET credit_kind = 'promotional' WHERE reference = ?") |
| 550 | .bind(&[reference.as_str().into()])? |
| 551 | .run() |
| 552 | .await?; |
| 553 | let account = self.account_of(&workspace).await?; |
| 554 | self.audit(&account.id, "credit", &format!("{} promotional AI credit to {workspace} for starting the plan", cents(UPGRADE_CREDIT_MICROS)), "g1t") |
| 555 | .await?; |
| 556 | Ok(()) |
| 557 | } |
| 558 | |
| 559 | // --- At $0 ----------------------------------------------------------------- |
| 560 | |
| 561 | /// Why a run on g1t's models cannot start for want of AI credit, if it |
| 562 | /// cannot. Auto-reload, when on, is tried first. |
| 563 | pub(crate) async fn ai_refusal(&self, workspace: &str) -> Result<Option<String>> { |
| 564 | if self.stripe.is_none() || self.free { |
| 565 | return Ok(None); |
| 566 | } |
| 567 | let account = self.account_of(workspace).await?; |
| 568 | if !needs_credit(self.plan_kind_for(workspace, &account).await?) { |
| 569 | return Ok(None); |
| 570 | } |
| 571 | if self.included_left(workspace).await? > 0 { |
| 572 | return Ok(None); |
| 573 | } |
| 574 | let (balance, _, _) = self.ai_balance(workspace).await?; |
| 575 | if balance > 0 { |
| 576 | return Ok(None); |
| 577 | } |
| 578 | let reload = self.reload_settings(workspace).await?; |
| 579 | if reload.enabled && reload.failed_at.is_none() { |
| 580 | if let Err(error) = self.reload_now(workspace).await { |
| 581 | worker::console_error!("{workspace}: auto-reload at a run's start failed: {error}"); |
| 582 | } |
| 583 | if self.ai_balance(workspace).await?.0 > 0 { |
| 584 | return Ok(None); |
| 585 | } |
| 586 | } |
| 587 | let failed = self.reload_settings(workspace).await?.failed_at.is_some(); |
| 588 | Ok(Some(out_of_credit_message(workspace, failed))) |
| 589 | } |
| 590 | |
| 591 | // --- Auto-reload --------------------------------------------------------- |
| 592 | |
| 593 | /// `set_ai_reload`: owners only. |
| 594 | pub(crate) async fn set_ai_reload(&self, a: SetAiReloadArgs) -> Result<Outcome<AiCredit>> { |
| 595 | let workspace = a.workspace.to_lowercase(); |
| 596 | if a.actor.role_in(&workspace) != Some(Role::Owner) { |
| 597 | return Ok(Outcome::fail(FailureCode::Forbidden, "Only an owner can change auto-reload.")); |
| 598 | } |
| 599 | if let Some(why) = reload_invalid(a.threshold_micros, a.target_micros, a.monthly_max_micros) { |
| 600 | return Ok(Outcome::fail(FailureCode::Invalid, why)); |
| 601 | } |
| 602 | if a.enabled { |
| 603 | let credit = self.ai_credit_of(&workspace).await?; |
| 604 | if !credit.can_buy { |
| 605 | return Ok(Outcome::fail(FailureCode::Conflict, "Auto-reload is for workspaces on the g1t plan that buy AI credit.")); |
| 606 | } |
| 607 | let has_card = match (&self.stripe, self.row(&workspace).await?.and_then(|row| row.customer_id)) { |
| 608 | (Some(stripe), Some(customer)) => stripe.default_payment_method(&customer).await.ok().flatten().is_some(), |
| 609 | _ => false, |
| 610 | }; |
| 611 | if !has_card { |
| 612 | return Ok(Outcome::fail(FailureCode::Conflict, "Auto-reload charges the workspace's saved card, and it has none. Buy AI credit once, or add a card on Stripe's billing page, first.")); |
| 613 | } |
| 614 | } |
| 615 | let now = rfc3339(now_ms()); |
| 616 | self.db |
| 617 | .prepare( |
| 618 | "INSERT INTO ai_reload (workspace, enabled, threshold_micros, target_micros, monthly_max_micros, updated_by, updated_at, failed_at, error) |
| 619 | VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, NULL, NULL) |
| 620 | ON CONFLICT (workspace) DO UPDATE SET enabled = ?2, threshold_micros = ?3, target_micros = ?4, monthly_max_micros = ?5, |
| 621 | updated_by = ?6, updated_at = ?7, failed_at = NULL, error = NULL", |
| 622 | ) |
| 623 | .bind(&[ |
| 624 | workspace.as_str().into(), |
| 625 | i32::from(a.enabled).into(), |
| 626 | (a.threshold_micros as f64).into(), |
| 627 | (a.target_micros as f64).into(), |
| 628 | (a.monthly_max_micros as f64).into(), |
| 629 | a.actor.username.as_str().into(), |
| 630 | now.as_str().into(), |
| 631 | ])? |
| 632 | .run() |
| 633 | .await?; |
| 634 | let account = self.account_of(&workspace).await?; |
| 635 | self.audit( |
| 636 | &account.id, |
| 637 | "ai_reload", |
| 638 | &format!( |
| 639 | "{workspace}: auto-reload {}: below {}, back to {}, at most {} a month", |
| 640 | if a.enabled { "on" } else { "off" }, |
| 641 | cents(a.threshold_micros), |
| 642 | cents(a.target_micros), |
| 643 | cents(a.monthly_max_micros) |
| 644 | ), |
| 645 | &a.actor.username, |
| 646 | ) |
| 647 | .await?; |
| 648 | // Below the threshold already: reload now rather than at the next run. |
| 649 | if a.enabled |
| 650 | && let Err(error) = self.reload_now(&workspace).await |
| 651 | { |
| 652 | worker::console_error!("{workspace}: auto-reload right after turning it on failed: {error}"); |
| 653 | } |
| 654 | Ok(Outcome::Ok(self.ai_credit_of(&workspace).await?)) |
| 655 | } |
| 656 | |
| 657 | /// Every workspace with auto-reload on that is below its threshold, |
| 658 | /// reloaded: each cron run. |
| 659 | pub(crate) async fn reload_ai_credit(&self) -> Result<u32> { |
| 660 | if self.stripe.is_none() { |
| 661 | return Ok(0); |
| 662 | } |
| 663 | #[derive(Deserialize)] |
| 664 | struct Row { |
| 665 | workspace: String, |
| 666 | } |
| 667 | let due = self |
| 668 | .db |
| 669 | .prepare("SELECT workspace FROM ai_reload WHERE enabled = 1 AND failed_at IS NULL LIMIT 100") |
| 670 | .all() |
| 671 | .await? |
| 672 | .results::<Row>()?; |
| 673 | let mut done = 0; |
| 674 | for Row { workspace } in due { |
| 675 | match self.reload_now(&workspace).await { |
| 676 | Ok(Some(_)) => done += 1, |
| 677 | Ok(None) => {} |
| 678 | Err(error) => worker::console_error!("{workspace}: auto-reload failed: {error}"), |
| 679 | } |
| 680 | } |
| 681 | Ok(done) |
| 682 | } |
| 683 | |
| 684 | /// Reloads the workspace's AI credit if it is below its threshold. |
| 685 | /// What was reloaded, or None. |
| 686 | pub(crate) async fn reload_now(&self, workspace: &str) -> Result<Option<i64>> { |
| 687 | let Some(stripe) = &self.stripe else { return Ok(None) }; |
| 688 | let reload = self.reload_settings(workspace).await?; |
| 689 | let (balance, _, _) = self.ai_balance(workspace).await?; |
| 690 | let Some(amount) = reload_amount(&reload, balance, reload.reloaded_micros) else { |
| 691 | return Ok(None); |
| 692 | }; |
| 693 | let Some(customer) = self.row(workspace).await?.and_then(|row| row.customer_id) else { |
| 694 | self.reload_failed(workspace, None, amount, "the workspace has no saved card").await?; |
| 695 | return Ok(None); |
| 696 | }; |
| 697 | let method = match stripe.default_payment_method(&customer).await { |
| 698 | Ok(Some(method)) => method, |
| 699 | Ok(None) => { |
| 700 | self.reload_failed(workspace, None, amount, "the workspace has no saved card").await?; |
| 701 | return Ok(None); |
| 702 | } |
| 703 | Err(error) => return Err(error), |
| 704 | }; |
| 705 | let month = rfc3339(now_ms())[..7].to_owned(); |
| 706 | // One key per attempt: the month and how many reloads came before. |
| 707 | // A retry after a crash is the same attempt, so the same payment. |
| 708 | #[derive(Deserialize)] |
| 709 | struct Count { |
| 710 | n: Option<f64>, |
| 711 | } |
| 712 | let before = self |
| 713 | .db |
| 714 | .prepare("SELECT COUNT(*) AS n FROM ai_reloads WHERE workspace = ? AND month = ? AND status = 'paid'") |
| 715 | .bind(&[workspace.into(), month.as_str().into()])? |
| 716 | .first::<Count>(None) |
| 717 | .await? |
| 718 | .and_then(|c| c.n) |
| 719 | .unwrap_or(0.0) as u32; |
| 720 | let key = format!("reload/{workspace}/{month}/{}", before + 1); |
| 721 | let credit_cents = (amount / 10_000) as u32; |
| 722 | let fee_cents = card_fee_cents(credit_cents, &self.card_fee().await?); |
| 723 | self.db |
| 724 | .prepare( |
| 725 | "INSERT OR IGNORE INTO ai_reloads (id, workspace, month, amount_micros, fee_micros, status, created_at) |
| 726 | VALUES (?, ?, ?, ?, ?, 'pending', ?)", |
| 727 | ) |
| 728 | .bind(&[ |
| 729 | key.as_str().into(), |
| 730 | workspace.into(), |
| 731 | month.as_str().into(), |
| 732 | (amount as f64).into(), |
| 733 | (f64::from(fee_cents) * 10_000.0).into(), |
| 734 | rfc3339(now_ms()).into(), |
| 735 | ])? |
| 736 | .run() |
| 737 | .await?; |
| 738 | let untaxed = crate::stripe::SavedCharge { |
| 739 | workspace, |
| 740 | customer: &customer, |
| 741 | payment_method: &method.id, |
| 742 | credit_cents, |
| 743 | fee_cents, |
| 744 | tax_cents: 0, |
| 745 | tax_calculation: None, |
| 746 | key: &key, |
| 747 | }; |
| 748 | // No Checkout page or invoice works the tax out here: Stripe Tax's |
| 749 | // calculation does, for the customer's saved address. Without one, |
| 750 | // nothing is charged and the owners are asked for it. |
| 751 | let calculation = match stripe.tax_calculation(&untaxed).await { |
| 752 | Ok(calculation) => calculation, |
| 753 | Err(error) if crate::stripe::is_tax_location_error(&error) => { |
| 754 | self.tax_address_needed(workspace).await?; |
| 755 | self.reload_failed(workspace, Some(&key), amount, "Stripe needs the workspace's billing address to work out tax; add it under Invoice details") |
| 756 | .await?; |
| 757 | return Ok(None); |
| 758 | } |
| 759 | Err(error) => return Err(error), |
| 760 | }; |
| 761 | let tax_cents = u32::try_from(calculation.tax_amount_exclusive.max(0)).unwrap_or(0); |
| 762 | let charge = crate::stripe::SavedCharge { tax_cents, tax_calculation: Some(&calculation.id), ..untaxed }; |
| 763 | let paid = match stripe.charge_saved(&charge).await { |
| 764 | Ok(intent) if intent["status"].as_str() == Some("succeeded") => intent["id"].as_str().map(str::to_owned), |
| 765 | Ok(intent) => { |
| 766 | let status = intent["status"].as_str().unwrap_or("unknown").to_owned(); |
| 767 | self.reload_failed(workspace, Some(&key), amount, &format!("the card needs the bank's approval ({status})")).await?; |
| 768 | return Ok(None); |
| 769 | } |
| 770 | Err(error) if crate::stripe::is_card_error(&error) => { |
| 771 | self.reload_failed(workspace, Some(&key), amount, &crate::stripe::friendly(&error)).await?; |
| 772 | return Ok(None); |
| 773 | } |
| 774 | Err(error) => return Err(error), |
| 775 | }; |
| 776 | let Some(intent) = paid else { return Ok(None) }; |
| 777 | self.db |
| 778 | .prepare("UPDATE ai_reloads SET status = 'paid', payment_intent = ? WHERE id = ?") |
| 779 | .bind(&[intent.as_str().into(), key.as_str().into()])? |
| 780 | .run() |
| 781 | .await?; |
| 782 | self.grant_purchased(workspace, &intent, amount, i64::from(fee_cents) * 10_000, "g1t", Some(&customer)).await?; |
| 783 | // Recorded with Stripe Tax once paid, so it is reported and filed; |
| 784 | // a failure is logged and the payment stands. |
| 785 | let transaction = match stripe.record_tax(&calculation.id, &intent).await { |
| 786 | Ok(id) => Some(id), |
| 787 | Err(error) => { |
| 788 | worker::console_error!("{workspace}: the tax on auto-reload {intent} was not recorded with Stripe Tax: {error}"); |
| 789 | None |
| 790 | } |
| 791 | }; |
| 792 | let extras = crate::tax::Extras { tax_cents: i64::from(tax_cents), fee_cents: i64::from(fee_cents) }; |
| 793 | self.record_extras(workspace, &intent, Some(&intent), extras, transaction.as_deref()).await?; |
| 794 | self.tax_address_given(workspace).await?; |
| 795 | Ok(Some(amount)) |
| 796 | } |
| 797 | |
| 798 | /// A reload that could not be charged: auto-reload is turned off, and |
| 799 | /// the owners are told. |
| 800 | async fn reload_failed(&self, workspace: &str, key: Option<&str>, amount: i64, why: &str) -> Result<()> { |
| 801 | let now = rfc3339(now_ms()); |
| 802 | if let Some(key) = key { |
| 803 | self.db |
| 804 | .prepare("UPDATE ai_reloads SET status = 'failed', error = ? WHERE id = ?") |
| 805 | .bind(&[why.into(), key.into()])? |
| 806 | .run() |
| 807 | .await?; |
| 808 | } |
| 809 | self.db |
| 810 | .prepare("UPDATE ai_reload SET enabled = 0, failed_at = ?, error = ? WHERE workspace = ?") |
| 811 | .bind(&[now.as_str().into(), why.into(), workspace.into()])? |
| 812 | .run() |
| 813 | .await?; |
| 814 | let account = self.account_of(workspace).await?; |
| 815 | self.audit(&account.id, "ai_reload_failed", &format!("{workspace}: auto-reload of {} failed ({why}); turned off", cents(amount)), "g1t") |
| 816 | .await?; |
| 817 | if let Some(identity) = &self.identity { |
| 818 | crate::limits::notify_with( |
| 819 | identity, |
| 820 | workspace, |
| 821 | &format!("g1t: auto-reload for {workspace} failed and is off"), |
| 822 | &format!( |
| 823 | "g1t tried to reload {} of AI credit for {workspace} and could not: {why}. Auto-reload is off until an owner turns it on again. Until then, runs on g1t's models stop once the AI credit is spent." |
| 824 | , cents(amount)), |
| 825 | "Open billing", |
| 826 | &format!("https://g1t.sh/{workspace}/-/billing#ai-credit"), |
| 827 | "You get this because you own this workspace on g1t. AI credit is explained at https://docs.g1t.sh/guides/usage-and-billing/#ai-credit", |
| 828 | ) |
| 829 | .await; |
| 830 | } |
| 831 | Ok(()) |
| 832 | } |
| 833 | |
| 834 | // --- The agent rate -------------------------------------------------------- |
| 835 | |
| 836 | /// How much each kind of token counts toward the agent rate: the price |
| 837 | /// book's `agent_token_weight_*` meters, a token's weight in millionths |
| 838 | /// (1,000,000 is 1). A meter missing counts 1. |
| 839 | pub(crate) async fn token_weights(&self) -> Result<TokenWeights> { |
| 840 | let mut weights = TokenWeights::default(); |
| 841 | for (meter, slot) in [ |
| 842 | ("agent_token_weight_input", &mut weights.input), |
| 843 | ("agent_token_weight_output", &mut weights.output), |
| 844 | ("agent_token_weight_cache_read", &mut weights.cache_read), |
| 845 | ("agent_token_weight_cache_write", &mut weights.cache_write), |
| 846 | ] { |
| 847 | if let Some((cost, _)) = self.price(meter).await? { |
| 848 | *slot = weight_of(cost); |
| 849 | } |
| 850 | } |
| 851 | Ok(weights) |
| 852 | } |
| 853 | |
| 854 | /// Charges a run's agent rate for the tokens counted since it was last |
| 855 | /// charged, once each: when the run reports and again when it is |
| 856 | /// settled, so tokens counted late are charged too. `reported` is what |
| 857 | /// the run's harness counted; the rate is charged on no fewer. Tokens |
| 858 | /// are weighted by kind (`token_weights`), and `runs.agent_tokens` |
| 859 | /// keeps the weighted tokens charged so far. |
| 860 | /// |
| 861 | /// On the workspace's own provider the model is not g1t's to charge, |
| 862 | /// but the agent rate is, on its own meter (`agent_tokens_own`) and its |
| 863 | /// own line (`<run>/agent-own`), so Usage and the statement show it as |
| 864 | /// the agent rate on the workspace's own model key. |
| 865 | pub(crate) async fn charge_agent_rate(&self, run_id: &str, run: &RunRow, reported: Option<RunTokens>) -> Result<()> { |
| 866 | if self.stripe.is_none() { |
| 867 | return Ok(()); |
| 868 | } |
| 869 | #[derive(Deserialize)] |
| 870 | struct Row { |
| 871 | session_id: Option<String>, |
| 872 | agent_tokens: Option<f64>, |
| 873 | created_at: String, |
| 874 | } |
| 875 | let Some(row) = self |
| 876 | .db |
| 877 | .prepare("SELECT session_id, agent_tokens, created_at FROM runs WHERE id = ?") |
| 878 | .bind(&[run_id.into()])? |
| 879 | .first::<Row>(None) |
| 880 | .await? |
| 881 | else { |
| 882 | return Ok(()); |
| 883 | }; |
| 884 | #[derive(Deserialize)] |
| 885 | struct Kinds { |
| 886 | input: Option<f64>, |
| 887 | output: Option<f64>, |
| 888 | cache_read: Option<f64>, |
| 889 | cache_write: Option<f64>, |
| 890 | } |
| 891 | let counted = match &row.session_id { |
| 892 | Some(session) => self |
| 893 | .db |
| 894 | .prepare( |
| 895 | "SELECT SUM(input) AS input, SUM(output) AS output, SUM(cache_read) AS cache_read, SUM(cache_write) AS cache_write |
| 896 | FROM token_usage WHERE workspace = ? AND session = ? AND day >= ?", |
| 897 | ) |
| 898 | .bind(&[run.workspace.as_str().into(), session.as_str().into(), row.created_at[..10].into()])? |
| 899 | .first::<Kinds>(None) |
| 900 | .await? |
| 901 | .map(|k| { |
| 902 | let n = |v: Option<f64>| v.unwrap_or(0.0).max(0.0) as u64; |
| 903 | RunTokens { input: n(k.input), output: n(k.output), cache_read: n(k.cache_read), cache_write: n(k.cache_write) } |
| 904 | }) |
| 905 | .unwrap_or_default(), |
| 906 | None => RunTokens::default(), |
| 907 | }; |
| 908 | let weights = self.token_weights().await?; |
| 909 | let charged = row.agent_tokens.unwrap_or(0.0) as u64; |
| 910 | let Some(total) = tokens_to_charge( |
| 911 | weighted(&counted, &weights), |
| 912 | reported.map_or(0, |tokens| weighted(&tokens, &weights)), |
| 913 | charged, |
| 914 | ) else { |
| 915 | return Ok(()); |
| 916 | }; |
| 917 | // Claimed first: two callers never charge the same tokens. |
| 918 | let claimed = self |
| 919 | .db |
| 920 | .prepare("UPDATE runs SET agent_tokens = ?1 WHERE id = ?2 AND agent_tokens = ?3 RETURNING id") |
| 921 | .bind(&[(total as f64).into(), run_id.into(), (charged as f64).into()])? |
| 922 | .first::<serde_json::Value>(None) |
| 923 | .await?; |
| 924 | if claimed.is_none() { |
| 925 | return Ok(()); |
| 926 | } |
| 927 | let own = run.own_provider(); |
| 928 | let meter = agent_rate_meter(own); |
| 929 | let tokens = total - charged; |
| 930 | let per_million = self.price(meter).await?.map_or(0.0, |(_, price)| price); |
| 931 | let base = agent_rate_micros(tokens, per_million); |
| 932 | // Before the rate takes effect: counted, and nothing charged. |
| 933 | if base == 0 { |
| 934 | return Ok(()); |
| 935 | } |
| 936 | let (charge, terms_note, discount) = self.charged(&run.workspace, base).await?; |
| 937 | let now = rfc3339(now_ms()); |
| 938 | let eligible = crate::credits::eligible_for(Some(g1t_contracts::billing::ComputeKind::Agent), None); |
| 939 | let drawn = self.draw(&run.workspace, charge, &crate::credits::month_of(&now), &eligible).await?; |
| 940 | let reference = agent_rate_reference(run_id, own, charged, total); |
| 941 | let what = match run.task.as_str() { |
| 942 | "plan" => format!("planning for {}", run.repo), |
| 943 | "review" => format!("the review of {}#{}", run.repo, run.number), |
| 944 | "update" => format!("catching up {}#{}", run.repo, run.number), |
| 945 | _ => format!("work on {}#{}", run.repo, run.number), |
| 946 | }; |
| 947 | let label = if own { "g1t agent rate, your own model key" } else { "g1t agent rate" }; |
| 948 | let counted_as = if weights.is_flat() { "tokens".to_owned() } else { format!("weighted tokens ({})", weights.describe()) }; |
| 949 | let description = format!("{label}: {} {counted_as} for {what}{terms_note}{}", crate::features::thousands(tokens), drawn.note()); |
| 950 | // g1t's own charge, even on the workspace's provider: it counts |
| 951 | // toward limits and spend like any other. |
| 952 | let line = RunRow { billed_to: None, ..run.clone() }; |
| 953 | self.enter(&run.workspace, EntryKind::Usage, -(charge - drawn.total()), &description, &reference, Some(&line), Some(0), None, None) |
| 954 | .await?; |
| 955 | self.db |
| 956 | .prepare("UPDATE ledger SET quantity = ?, price_version = ? WHERE reference = ?") |
| 957 | .bind(&[(tokens as f64).into(), optional(self.version_now(meter).await?.as_deref()), reference.as_str().into()])? |
| 958 | .run() |
| 959 | .await?; |
| 960 | self.record_drawn(&reference, &drawn).await?; |
| 961 | self.record_discount(&reference, discount).await?; |
| 962 | self.count_spend(&run.workspace, 0, charge - drawn.total(), &drawn).await; |
| 963 | Ok(()) |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | /// How much each kind of token counts toward the agent rate. All 1 by |
| 968 | /// default: every token counts once. |
| 969 | #[derive(Clone, Copy, Debug, PartialEq)] |
| 970 | pub(crate) struct TokenWeights { |
| 971 | pub input: f64, |
| 972 | pub output: f64, |
| 973 | pub cache_read: f64, |
| 974 | pub cache_write: f64, |
| 975 | } |
| 976 | |
| 977 | impl Default for TokenWeights { |
| 978 | fn default() -> Self { |
| 979 | TokenWeights { input: 1.0, output: 1.0, cache_read: 1.0, cache_write: 1.0 } |
| 980 | } |
| 981 | } |
| 982 | |
| 983 | impl TokenWeights { |
| 984 | /// Every token counts once. |
| 985 | pub(crate) fn is_flat(&self) -> bool { |
| 986 | *self == TokenWeights::default() |
| 987 | } |
| 988 | |
| 989 | /// `input ×1, output ×1, cache reads ×0.1, cache writes ×1`. |
| 990 | pub(crate) fn describe(&self) -> String { |
| 991 | let w = |v: f64| { |
| 992 | let text = format!("{v:.3}"); |
| 993 | text.trim_end_matches('0').trim_end_matches('.').to_owned() |
| 994 | }; |
| 995 | format!( |
| 996 | "input ×{}, output ×{}, cache reads ×{}, cache writes ×{}", |
| 997 | w(self.input), |
| 998 | w(self.output), |
| 999 | w(self.cache_read), |
| 1000 | w(self.cache_write) |
| 1001 | ) |
| 1002 | } |
| 1003 | } |
| 1004 | |
| 1005 | /// A weight from its price-book figure, in millionths; never below 0. |
| 1006 | pub(crate) fn weight_of(micros: f64) -> f64 { |
| 1007 | if micros.is_finite() { (micros / 1_000_000.0).max(0.0) } else { 1.0 } |
| 1008 | } |
| 1009 | |
| 1010 | /// A run's tokens as the agent rate counts them, each kind at its weight, |
| 1011 | /// rounded down to a whole token. |
| 1012 | pub(crate) fn weighted(tokens: &RunTokens, weights: &TokenWeights) -> u64 { |
| 1013 | let sum = tokens.input as f64 * weights.input |
| 1014 | + tokens.output as f64 * weights.output |
| 1015 | + tokens.cache_read as f64 * weights.cache_read |
| 1016 | + tokens.cache_write as f64 * weights.cache_write; |
| 1017 | sum.max(0.0).floor() as u64 |
| 1018 | } |
| 1019 | |
| 1020 | /// The price-book meter a run's agent rate is on: its own for runs on the |
| 1021 | /// workspace's own model key, so it can be priced and shown apart. |
| 1022 | pub(crate) fn agent_rate_meter(own_provider: bool) -> &'static str { |
| 1023 | if own_provider { "agent_tokens_own" } else { "agent_tokens" } |
| 1024 | } |
| 1025 | |
| 1026 | /// The tokens a run's agent rate covers now: the more of what the proxy |
| 1027 | /// counted and what the harness reported, when that is more than was |
| 1028 | /// charged already. None when there is nothing new. |
| 1029 | pub(crate) fn tokens_to_charge(counted: u64, reported: u64, charged: u64) -> Option<u64> { |
| 1030 | let total = counted.max(reported); |
| 1031 | (total > charged).then_some(total) |
| 1032 | } |
| 1033 | |
| 1034 | /// The ledger reference of an agent-rate line: `<run>/agent` the first |
| 1035 | /// time, `<run>/agent/<tokens>` for tokens counted later; `agent-own` on |
| 1036 | /// the workspace's own model key. |
| 1037 | pub(crate) fn agent_rate_reference(run_id: &str, own_provider: bool, charged: u64, total: u64) -> String { |
| 1038 | let part = if own_provider { "agent-own" } else { "agent" }; |
| 1039 | if charged == 0 { format!("{run_id}/{part}") } else { format!("{run_id}/{part}/{total}") } |
| 1040 | } |
| 1041 | |
| 1042 | #[cfg(test)] |
| 1043 | mod tests { |
| 1044 | use super::*; |
| 1045 | |
| 1046 | fn fee(on: bool) -> CardFee { |
| 1047 | CardFee { on, percent_micros: 29_000.0, fixed_cents: 30 } |
| 1048 | } |
| 1049 | |
| 1050 | #[test] |
| 1051 | fn the_card_fee_is_stripes_fee_grossed_up_and_off_when_switched_off() { |
| 1052 | // $25 of credit: ($25 + $0.30) / 0.971 = $26.06, so a $1.06 fee. |
| 1053 | assert_eq!(card_fee_cents(2_500, &fee(true)), 106); |
| 1054 | // What is left after Stripe's 2.9% + 30¢ is at least the credit. |
| 1055 | for credit in [1_000u32, 2_500, 5_000, 10_000, 100_000] { |
| 1056 | let total = credit + card_fee_cents(credit, &fee(true)); |
| 1057 | let net = f64::from(total) - (f64::from(total) * 0.029).round() - 30.0; |
| 1058 | assert!(net >= f64::from(credit) - 1.0, "{credit}: {total} leaves {net}"); |
| 1059 | } |
| 1060 | assert_eq!(card_fee_cents(2_500, &fee(false)), 0); |
| 1061 | assert_eq!(card_fee_cents(0, &fee(true)), 0); |
| 1062 | } |
| 1063 | |
| 1064 | #[test] |
| 1065 | fn amounts_are_whole_dollars_from_ten_to_a_thousand() { |
| 1066 | assert!(amount_ok(1_000).is_ok() && amount_ok(100_000).is_ok() && amount_ok(2_500).is_ok()); |
| 1067 | assert!(amount_ok(999).is_err() && amount_ok(100_100).is_err() && amount_ok(1_050).is_err()); |
| 1068 | } |
| 1069 | |
| 1070 | fn reload(threshold: i64, target: i64, max: i64) -> AiReload { |
| 1071 | AiReload { enabled: true, threshold_micros: threshold, target_micros: target, monthly_max_micros: max, ..AiReload::default() } |
| 1072 | } |
| 1073 | |
| 1074 | const D: i64 = MICROS_PER_DOLLAR; |
| 1075 | |
| 1076 | #[test] |
| 1077 | fn auto_reload_tops_up_to_the_target_below_the_threshold_within_the_monthly_maximum() { |
| 1078 | let r = reload(10 * D, 25 * D, 100 * D); |
| 1079 | // Above the threshold: nothing. |
| 1080 | assert_eq!(reload_amount(&r, 10 * D, 0), None); |
| 1081 | // Below it: back to the target, in whole dollars. |
| 1082 | assert_eq!(reload_amount(&r, 9 * D, 0), Some(16 * D)); |
| 1083 | assert_eq!(reload_amount(&r, 9_500_000, 0), Some(16 * D)); |
| 1084 | // Owing more than the target is still a reload to the target. |
| 1085 | assert_eq!(reload_amount(&r, -3 * D, 0), Some(28 * D)); |
| 1086 | // Never less than $10. |
| 1087 | assert_eq!(reload_amount(&reload(10 * D, 12 * D, 100 * D), 9 * D, 0), Some(10 * D)); |
| 1088 | // The monthly maximum caps it, and below $10 of room nothing is done. |
| 1089 | assert_eq!(reload_amount(&r, 0, 90 * D), Some(10 * D)); |
| 1090 | assert_eq!(reload_amount(&r, 0, 95 * D), None); |
| 1091 | assert_eq!(reload_amount(&r, 0, 100 * D), None); |
| 1092 | } |
| 1093 | |
| 1094 | #[test] |
| 1095 | fn a_failed_or_disabled_reload_does_nothing() { |
| 1096 | let off = AiReload { enabled: false, ..reload(10 * D, 25 * D, 100 * D) }; |
| 1097 | assert_eq!(reload_amount(&off, 0, 0), None); |
| 1098 | let failed = AiReload { failed_at: Some("2026-10-08T00:00:00Z".into()), ..reload(10 * D, 25 * D, 100 * D) }; |
| 1099 | assert_eq!(reload_amount(&failed, 0, 0), None); |
| 1100 | } |
| 1101 | |
| 1102 | #[test] |
| 1103 | fn auto_reload_settings_are_checked() { |
| 1104 | assert_eq!(reload_invalid(10 * D, 25 * D, 100 * D), None); |
| 1105 | assert!(reload_invalid(10 * D, 15 * D, 100 * D).is_some()); |
| 1106 | assert!(reload_invalid(10 * D, 2_000 * D, 10_000 * D).is_some()); |
| 1107 | assert!(reload_invalid(10 * D, 25 * D, 10 * D).is_some()); |
| 1108 | assert!(reload_invalid(10 * D, 25 * D, 20_000 * D).is_some()); |
| 1109 | assert!(reload_invalid(10 * D, 25_500_000, 100 * D).is_some()); |
| 1110 | assert!(reload_invalid(-1, 25 * D, 100 * D).is_some()); |
| 1111 | } |
| 1112 | |
| 1113 | #[test] |
| 1114 | fn the_agent_rate_is_per_million_tokens_rounded_up() { |
| 1115 | // $0.25 a million: 2 million tokens are 50 cents. |
| 1116 | assert_eq!(agent_rate_micros(2_000_000, 250_000.0), 500_000); |
| 1117 | assert_eq!(agent_rate_micros(1, 250_000.0), 1); |
| 1118 | assert_eq!(agent_rate_micros(0, 250_000.0), 0); |
| 1119 | // Before it takes effect the price book says 0. |
| 1120 | assert_eq!(agent_rate_micros(5_000_000, 0.0), 0); |
| 1121 | } |
| 1122 | |
| 1123 | #[test] |
| 1124 | fn own_key_runs_are_charged_the_agent_rate_on_their_own_meter_and_line() { |
| 1125 | assert_eq!(agent_rate_meter(true), "agent_tokens_own"); |
| 1126 | assert_eq!(agent_rate_meter(false), "agent_tokens"); |
| 1127 | assert_eq!(agent_rate_reference("run_1", true, 0, 900), "run_1/agent-own"); |
| 1128 | assert_eq!(agent_rate_reference("run_1", true, 900, 1_200), "run_1/agent-own/1200"); |
| 1129 | assert_eq!(agent_rate_reference("run_1", false, 0, 900), "run_1/agent"); |
| 1130 | assert_eq!(agent_rate_reference("run_1", false, 900, 1_200), "run_1/agent/1200"); |
| 1131 | } |
| 1132 | |
| 1133 | fn tokens(input: u64, output: u64, cache_read: u64, cache_write: u64) -> RunTokens { |
| 1134 | RunTokens { input, output, cache_read, cache_write } |
| 1135 | } |
| 1136 | |
| 1137 | #[test] |
| 1138 | fn every_token_counts_once_by_default() { |
| 1139 | let flat = TokenWeights::default(); |
| 1140 | assert!(flat.is_flat()); |
| 1141 | assert_eq!(weighted(&tokens(1_000, 500, 90_000, 5_000), &flat), 96_500); |
| 1142 | assert_eq!(weighted(&RunTokens::default(), &flat), 0); |
| 1143 | } |
| 1144 | |
| 1145 | #[test] |
| 1146 | fn cache_reads_can_count_for_a_tenth() { |
| 1147 | let tenth = TokenWeights { cache_read: weight_of(100_000.0), ..TokenWeights::default() }; |
| 1148 | assert!(!tenth.is_flat()); |
| 1149 | // 1,000 + 500 + 9,000 + 5,000. |
| 1150 | assert_eq!(weighted(&tokens(1_000, 500, 90_000, 5_000), &tenth), 15_500); |
| 1151 | // Rounded down to a whole token. |
| 1152 | assert_eq!(weighted(&tokens(0, 0, 15, 0), &tenth), 1); |
| 1153 | assert_eq!(tenth.describe(), "input ×1, output ×1, cache reads ×0.1, cache writes ×1"); |
| 1154 | assert_eq!(TokenWeights::default().describe(), "input ×1, output ×1, cache reads ×1, cache writes ×1"); |
| 1155 | } |
| 1156 | |
| 1157 | #[test] |
| 1158 | fn a_weight_is_never_below_nothing() { |
| 1159 | assert_eq!(weight_of(1_000_000.0), 1.0); |
| 1160 | assert_eq!(weight_of(1_250_000.0), 1.25); |
| 1161 | assert_eq!(weight_of(-5.0), 0.0); |
| 1162 | assert_eq!(weight_of(f64::NAN), 1.0); |
| 1163 | } |
| 1164 | |
| 1165 | #[test] |
| 1166 | fn the_rate_covers_the_more_of_what_was_counted_and_reported_once() { |
| 1167 | // The proxy counted nothing (no session, or its reports were lost): |
| 1168 | // the harness's count is charged. |
| 1169 | assert_eq!(tokens_to_charge(0, 5_000, 0), Some(5_000)); |
| 1170 | // The proxy counted more: its count. |
| 1171 | assert_eq!(tokens_to_charge(6_000, 5_000, 0), Some(6_000)); |
| 1172 | // Charged already: only what is new, and nothing twice. |
| 1173 | assert_eq!(tokens_to_charge(6_000, 5_000, 6_000), None); |
| 1174 | assert_eq!(tokens_to_charge(7_000, 0, 6_000), Some(7_000)); |
| 1175 | assert_eq!(tokens_to_charge(0, 0, 0), None); |
| 1176 | } |
| 1177 | |
| 1178 | #[test] |
| 1179 | fn only_workspaces_paying_on_the_plan_need_ai_credit() { |
| 1180 | assert!(needs_credit(PlanKind::Paid)); |
| 1181 | assert!(!needs_credit(PlanKind::Internal)); |
| 1182 | assert!(!needs_credit(PlanKind::Enterprise)); |
| 1183 | assert!(!needs_credit(PlanKind::Free)); |
| 1184 | assert!(out_of_credit_message("acme", false).contains("/acme/-/billing#ai-credit")); |
| 1185 | assert!(out_of_credit_message("acme", true).contains("Auto-reload was turned off")); |
| 1186 | } |
| 1187 | |
| 1188 | #[test] |
| 1189 | fn a_purchase_is_credited_only_once_paid_and_only_for_what_was_paid() { |
| 1190 | assert!(purchase_paid("paid", Some(2_606), 2_500).is_ok()); |
| 1191 | assert!(purchase_paid("unpaid", Some(2_606), 2_500).unwrap_err().contains("not finished")); |
| 1192 | assert!(purchase_paid("paid", Some(2_000), 2_500).is_err()); |
| 1193 | assert!(purchase_paid("paid", None, 2_500).is_err()); |
| 1194 | // The grant's id is the page's id and the ledger's reference is |
| 1195 | // unique, and the checkout row is claimed open → paid before either |
| 1196 | // is written: the webhook and the person coming back credit once. |
| 1197 | let source = include_str!("ai.rs"); |
| 1198 | assert!(source.contains("UPDATE checkouts SET status = 'paid' WHERE id = ? AND status = 'open' RETURNING id")); |
| 1199 | assert!(source.contains("INSERT OR IGNORE INTO credit_grants")); |
| 1200 | } |
| 1201 | |
| 1202 | #[test] |
| 1203 | fn the_upgrade_credit_is_one_grant_per_workspace() { |
| 1204 | assert_eq!(upgrade_reference("Acme"), upgrade_reference("acme")); |
| 1205 | assert!(upgrade_reference("acme").starts_with("crd"), "given, never a payment"); |
| 1206 | assert_eq!(UPGRADE_CREDIT_MICROS, 5_000_000); |
| 1207 | } |
| 1208 | } |