Revert "chore: disabled metrics endpoint"

This reverts commit 833a964337.

routes/index.ts

@@ -1,13 +1,14 @@
 import express from "express";
 import { prices } from "./prices";
 import { packages } from "./packages";
+import { metrics } from "./metrics";
 import { errors } from "./errors";
 import { configs } from "./configs";
 import { providers } from "./providers";
 import { enableLiteMode } from "../config";
 
 export const getRouter = () => {
-  const router = express.Router();
+	const router = express.Router();
 
   prices(router);
   packages(router);
@@ -15,6 +16,7 @@ export const getRouter = () => {
   providers(router);
 
   if (!enableLiteMode) {
+    metrics(router);
     errors(router);
   }
 

routes/metrics.ts

@@ -0,0 +1,20 @@
+import { Router } from "express";
+import asyncHandler from "express-async-handler";
+import { saveMetric } from "../helpers/cloudwatch";
+
+export const metrics = (router: Router) => {
+
+  /**
+   * This endpoint is used for saving metric values in AWS Cloudwatch.
+   * Thanks to them we can analyse redstone-node performance and build
+   * nice charts
+  */
+  router.post("/metrics", asyncHandler(async (req, res) => {
+    const { label, value } = req.body;
+    await saveMetric({ label, value });
+
+    return res.json({
+      msg: "Metric saved",
+    });
+  }));
+};

test/routes/metrics.test.ts

@@ -0,0 +1,29 @@
+process.env.LIGHT_MODE = "false";
+import request from "supertest";
+import { app } from "../../app";
+import { connect, closeDatabase } from "../helpers/test-db";
+import * as cloudwatch from "../../helpers/cloudwatch";
+
+describe("Testing metrics route", () => {
+  beforeAll(async () => await connect());
+  afterAll(async () => await closeDatabase());
+
+  const testMetricValue = {
+    label: "test-metric",
+    value: 42,
+  };
+
+  test("Should post a test metric", async () => {
+    // Given
+    const spy = jest.spyOn(cloudwatch, "saveMetric");
+
+    // When
+    await request(app)
+      .post("/metrics")
+      .send(testMetricValue)
+      .expect(200);
+
+    // Then
+    expect(spy).toHaveBeenCalledWith(testMetricValue);
+  });
+});