feat(waku-utils): Add waku handshake demo

libs/waku-utils/examples/demo.ts

@@ -0,0 +1,41 @@
+import debug from 'debug'
+import { writeFileSync } from 'fs'
+
+import { Protocols, createLightNode, waitForRemotePeer } from '@waku/sdk'
+import * as utils from '@waku/utils/bytes'
+
+import { getPairingObject, proceedHandshake } from 'waku-utils/src/waku-utils'
+import { NoiseSecureMessage } from '@waku/noise/dist/codec'
+
+debug.enable('nimbus-gui:*')
+
+const log = debug('nimbus-gui:waku:demo')
+
+async function startNode() {
+  const node = await createLightNode({
+    defaultBootstrap: true,
+  })
+  await node.start()
+  await waitForRemotePeer(node, [Protocols.Filter, Protocols.LightPush])
+
+  const pairingObj = getPairingObject(node)
+  const pInfo = pairingObj.getPairingInfo()
+
+  writeFileSync(
+    process.env['QR_MESSAGE_PATH']!,
+    utils.bytesToHex(pInfo.qrMessageNameTag),
+  )
+
+  writeFileSync(process.env['QR_PATH']!, pInfo.qrCode)
+
+  const { decoder } = await proceedHandshake(pairingObj)
+
+  const callback = (wakuMessage: NoiseSecureMessage) => {
+    log('New message received. Payload:', wakuMessage.payload)
+  }
+
+  await node.filter.subscribe([decoder], callback)
+  log('Subscription created')
+}
+log('Starting Waku')
+startNode()

libs/waku-utils/tsconfig.lib.json

@@ -1,8 +1,8 @@
 {
   "extends": "./tsconfig.json",
   "compilerOptions": {
-    "rootDir": "src",
+    "rootDir": "src"
   },
   "include": ["src/**/*.ts"],
-  "exclude": ["vite.config.ts", "src/**/*.spec.ts", "src/**/*.test.ts"]
+  "exclude": ["vite.config.ts", "src/**/*.spec.ts", "src/**/*.test.ts", "examples/**/*"]
 }