feat: add sentry error monitoring

Author: matheus1lva

.env.example

@@ -12,3 +12,5 @@ RPC_URL_8453=https://example-rpc
 RPC_URL_42161=https://example-rpc
 RPC_URL_80094=https://example-rpc
 RPC_URL_747474=https://example-rpc
+# Sentry (error monitoring). Leave unset to disable.
+SENTRY_DSN=

bun.lock

@@ -17,6 +17,7 @@
   },
   "dependencies": {
     "@neondatabase/serverless": "0.10.4",
+    "@sentry/cloudflare": "10.57.0",
     "dotenv": "16.6.1",
     "viem": "2.47.6"
   },

package.json

@@ -1,3 +1,4 @@
+import * as Sentry from '@sentry/cloudflare'
 import { authenticateRequest } from './auth'
 import { CACHE_CONTROL_NO_STORE } from './cache'
 import { createPool } from './db'
@@ -52,7 +53,7 @@ async function routePriceRequest(request: Request, env: Env, pathname: string):
   throw new ApiError('NOT_FOUND', 'Route not found')
 }
 
-export default {
+const worker = {
   async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
     if (request.method === 'OPTIONS') {
       return optionsResponse()
@@ -110,7 +111,18 @@ export default {
           error: error instanceof Error ? error.message : String(error),
         }),
       )
+      Sentry.captureException(error)
       return jsonError(new ApiError('INTERNAL_ERROR', 'Unexpected internal error'), withCors({ 'cache-control': CACHE_CONTROL_NO_STORE }))
     }
   },
 }
+
+export default Sentry.withSentry(
+  (env: Env) => ({
+    dsn: env.SENTRY_DSN,
+    enabled: Boolean(env.SENTRY_DSN),
+    // Performance tracing is sampled; error capture is always on.
+    tracesSampleRate: 0.1,
+  }),
+  worker,
+)

src/index.ts

@@ -11,6 +11,7 @@ export type PriceSource = (typeof SOURCE_PRIORITY)[number]
 export interface Env {
   DATABASE_URL: string
   ENSO_API_KEY?: string
+  SENTRY_DSN?: string
   [key: string]: string | undefined
 }
 

src/types.ts

@@ -1,6 +1,7 @@
 name = "yearn-prices"
 main = "src/index.ts"
 compatibility_date = "2026-03-30"
+compatibility_flags = ["nodejs_compat"]
 
 [observability.logs]
 enabled = true