added dd tracing (#584)

* added dd tracing

* format

* added env var to control Datadog tracer

---------

Co-authored-by: Phillip Ho <arcoraven@gmail.com>

Author: AmineAfia

package.json

@@ -54,6 +54,7 @@
     "cron-parser": "^4.9.0",
     "crypto": "^1.0.1",
     "crypto-js": "^4.2.0",
+    "dd-trace": "^5.19.0",
     "dotenv": "^16.0.3",
     "ethers": "5",
     "ethers-aws-kms-signer": "^1.3.2",

src/index.ts

@@ -2,6 +2,7 @@ import "./polyfill";
 import { initServer } from "./server";
 import { env } from "./utils/env";
 import { logger } from "./utils/logger";
+import "./utils/tracer";
 import { initWorker } from "./worker";
 
 const main = async () => {

src/utils/env.ts

@@ -83,6 +83,7 @@ export const env = createEnv({
       .enum(["default", "sandbox", "server_only", "worker_only"])
       .default("default"),
     GLOBAL_RATE_LIMIT_PER_MIN: z.coerce.number().default(400 * 60),
+    DD_TRACER_ACTIVATED: z.coerce.boolean().default(false),
   },
   clientPrefix: "NEVER_USED",
   client: {},
@@ -110,6 +111,7 @@ export const env = createEnv({
     REDIS_URL: process.env.REDIS_URL,
     ENGINE_MODE: process.env.ENGINE_MODE,
     GLOBAL_RATE_LIMIT_PER_MIN: process.env.GLOBAL_RATE_LIMIT_PER_MIN,
+    DD_TRACER_ACTIVATED: process.env.DD_TRACER_ACTIVATED,
   },
   onValidationError: (error: ZodError) => {
     console.error(

src/utils/tracer.ts

@@ -0,0 +1,10 @@
+import tracer from "dd-trace";
+import {env} from "./env";
+
+if (env.DD_TRACER_ACTIVATED) {
+  tracer.init(); // initialized in a different file to avoid hoisting.
+} else {
+  console.info("DD_TRACER_ACTIVATED is not activated");
+}
+
+export default tracer;