Add message latency to ping command

commands/misc/ping.js

@@ -1,7 +1,11 @@
 module.exports = {
 	name: 'ping',
 	description: 'Just ping.',
-	execute({message, client}) {
-		message.channel.send(`Pong.\n${client.ws.ping}ms`)
+	async execute({message, client}) {
+		let apiLatency = client.ws.ping;
+		const time = process.hrtime.bigint();
+		let initialMessage = await message.channel.send(`Pong.`)
+		const diff = Number(process.hrtime.bigint() - time) * 1e-6;
+		initialMessage.edit(`Pong.\nAPI latency: ${apiLatency} ms\nMessage latency: ${diff.toFixed(0)} ms.`);
 	}
 };