import { fn } from "tessera" export default fn(async ({ db, input }) => {  const user = await db.users.find(input.userId)  await sendEmail(user.email, "Welcome to Acme")  return { sent: true }})

Deploying

Terminal

npx tessera functions deploy# ✓ welcome-email  deployed to development

Calling a function

await functions.invoke("welcome-email", { userId })

Runtime

Functions run on Node.js 20 with a 30 second default timeout and 512 MB of memory.

Presence

Triggers & schedules

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