Blyp Docs

Fastify

Import from @blyp/core/fastify.

import Fastify from "fastify";
import { createLogger } from "@blyp/core/fastify";

const app = Fastify();

await app.register(createLogger({
  level: "info",
}));

app.get("/hello", async (request) => {
  request.blypLog.info("fastify-route");
  return { ok: true };
});

What Blyp decorates

The adapter logs in onResponse, records thrown failures from onError, and registers the client ingestion route when enabled.

What auto-logged requests look like

With automatic request logging enabled, Blyp emits terminal output like:

[INFO]  GET  /health        200  2ms
[INFO]  POST /checkout      200  143ms
[INFO]  GET  /users/42      404  8ms
[ERROR] POST /payments      500  1203ms

Fields included automatically: method, path, status code, and duration.

In production (NDJSON):

{"level":"info","time":1710000000000,"msg":"GET /health","type":"http_request","method":"GET","url":"/health","statusCode":200,"responseTime":2}
{"level":"info","time":1710000000001,"msg":"POST /checkout","type":"http_request","method":"POST","url":"/checkout","statusCode":200,"responseTime":143}

Relevant types

import type {
  FastifyLoggerConfig,
  FastifyLoggerPlugin,
} from "@blyp/core/fastify";