From 8b0a40f2883fd0a21ad7a15328a411cc9b8ca4ee Mon Sep 17 00:00:00 2001
From: Adi Bhagavath <adibhagawath@gmail.com>
Date: Wed, 15 May 2024 10:33:28 +0530
Subject: [PATCH] Add a demo script to listen the events

Signed-off-by: Adi Bhagavath <adibhagawath@gmail.com>
---
 demo/src/listen-events.ts | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 demo/src/listen-events.ts

diff --git a/demo/src/listen-events.ts b/demo/src/listen-events.ts
new file mode 100644
index 00000000..c151b8c7
--- /dev/null
+++ b/demo/src/listen-events.ts
@@ -0,0 +1,33 @@
+import { ApiPromise, WsProvider } from '@polkadot/api'
+
+async function main() {
+  const networkAddress = process.env.NETWORK_ADDRESS
+    ? process.env.NETWORK_ADDRESS
+    : 'ws://127.0.0.1:9944'
+  const provider = new WsProvider(networkAddress)
+  const api = await ApiPromise.create({ provider })
+
+  // Subscribe to system events
+  api.query.system.events((events) => {
+    // Loop through the array of events
+    events.forEach((record) => {
+      // Extract the phase, event type, and event data
+      const { event, phase } = record
+      const types = event.typeDef
+      const args = event.data.map((data) => data.toString())
+
+      // Print the event details
+      console.log(
+        `\nEvent: ${event.section}.${event.method} [${phase.toString()}]`
+      )
+      console.log(`\tParameters:`)
+      args.forEach((arg, index) => {
+        console.log(`\t\t${types[index].type}: ${arg}`)
+      })
+    })
+  })
+}
+
+main().catch((error) => {
+  console.error('Error:', error)
+})