refactor(server): add more error utils

apps/server/package.json

@@ -40,7 +40,7 @@
     "injeca": "catalog:",
     "pg": "^8.20.0",
     "postgres": "^3.4.8",
-    "stripe": "catalog:",
+    "stripe": "^20.3.0",
     "tsx": "^4.21.0",
     "valibot": "catalog:"
   },

apps/server/src/routes/stripe.ts

@@ -8,7 +8,7 @@ import { Hono } from 'hono'
 import { integer, minValue, number, object, pipe, safeParse } from 'valibot'
 
 import { authGuard } from '../middlewares/auth'
-import { ApiError, createBadRequestError } from '../utils/error'
+import { createBadRequestError, createServiceUnavailableError } from '../utils/error'
 
 const CheckoutBodySchema = object({
   amount: pipe(number(), integer(), minValue(1)),
@@ -20,7 +20,7 @@ export function createStripeRoutes(fluxService: FluxService, env: Env) {
   return new Hono<HonoEnv>()
     .post('/checkout', authGuard, async (c) => {
       if (!stripe)
-        throw new ApiError(503, 'STRIPE_NOT_CONFIGURED', 'Stripe is not configured')
+        throw createServiceUnavailableError('Stripe is not configured', 'STRIPE_NOT_CONFIGURED')
 
       const user = c.get('user')!
       const body = await c.req.json()
@@ -58,11 +58,11 @@ export function createStripeRoutes(fluxService: FluxService, env: Env) {
     })
     .post('/webhook', async (c) => {
       if (!stripe || !env.STRIPE_WEBHOOK_SECRET)
-        throw new ApiError(503, 'STRIPE_NOT_CONFIGURED', 'Stripe is not configured')
+        throw createServiceUnavailableError('Stripe is not configured', 'STRIPE_NOT_CONFIGURED')
 
       const sig = c.req.header('stripe-signature')
       if (!sig)
-        return c.json({ error: 'No signature' }, 400)
+        throw createBadRequestError('No signature', 'MISSING_SIGNATURE')
 
       let event: Stripe.Event
       try {
@@ -71,7 +71,7 @@ export function createStripeRoutes(fluxService: FluxService, env: Env) {
       }
       catch (err: unknown) {
         const message = err instanceof Error ? err.message : 'Unknown error'
-        return c.json({ error: `Webhook Error: ${message}` }, 400)
+        throw createBadRequestError(`Webhook Error: ${message}`, 'WEBHOOK_ERROR')
       }
 
       if (event.type === 'checkout.session.completed') {

apps/server/src/routes/v1completions.ts

@@ -7,6 +7,7 @@ import type { HonoEnv } from '../types/hono'
 import { Hono } from 'hono'
 
 import { authGuard } from '../middlewares/auth'
+import { createPaymentRequiredError } from '../utils/error'
 
 // Only forward these headers from the upstream LLM response
 const SAFE_RESPONSE_HEADERS = new Set([
@@ -21,7 +22,7 @@ export function createV1CompletionsRoutes(fluxService: FluxService, env: Env) {
     const user = c.get('user')!
     const flux = await fluxService.getFlux(user.id)
     if (flux.flux <= 0) {
-      return c.json({ error: 'Insufficient flux' }, 402)
+      throw createPaymentRequiredError('Insufficient flux')
     }
 
     const body = await c.req.json()

apps/server/src/services/flux.ts

@@ -3,6 +3,8 @@ import type { Database } from './db'
 
 import { and, eq, gte, sql } from 'drizzle-orm'
 
+import { createPaymentRequiredError } from '../utils/error'
+
 import * as schema from '../schemas/flux'
 
 export function createFluxService(db: Database<typeof fullSchema>) {
@@ -39,7 +41,7 @@ export function createFluxService(db: Database<typeof fullSchema>) {
         .returning()
 
       if (result.length === 0) {
-        throw new Error('Insufficient flux')
+        throw createPaymentRequiredError('Insufficient flux')
       }
 
       return result[0]

apps/server/src/utils/error.ts

@@ -47,9 +47,23 @@ export function createNotFoundError(message = 'Not Found', details?: unknown) {
   return new ApiError(404, 'NOT_FOUND', message, details)
 }
 
+/**
+ * Creates a payment required error (402)
+ */
+export function createPaymentRequiredError(message: string, details?: unknown) {
+  return new ApiError(402, 'PAYMENT_REQUIRED', message, details)
+}
+
 /**
  * Creates a conflict error (409)
  */
 export function createConflictError(message: string, details?: unknown) {
   return new ApiError(409, 'CONFLICT', message, details)
 }
+
+/**
+ * Creates a service unavailable error (503)
+ */
+export function createServiceUnavailableError(message = 'Service Unavailable', errorCode = 'SERVICE_UNAVAILABLE', details?: unknown) {
+  return new ApiError(503, errorCode, message, details)
+}