Merge pull request #2 from LightningTipBot/no_username_message

No username message

README.md

@@ -71,7 +71,7 @@ You can either use your own LNbits instance (recommended) or create an account a
 
 ### Live tooltips
 
-The bot replies to a tipped message to indicate to all participants how much tips a post has received. This message will be updated as new tips are given to a post.
+The bot replies to a tipped message to indicate to all participants how many and what amount of tips a post has received. This tooltip will be updated as new tips are given to a post.
 
 <p align="center">
   	<img alt="How to set up a lnbits wallet and the User Manager extension." src="resources/tooltips.png" >

start.go

@@ -15,6 +15,7 @@ import (
 const (
 	startSettingWalletMessage = "🧮 Setting up your wallet..."
 	startWalletReadyMessage   = "✅ *Your wallet is ready.*"
+	startNoUsernameMessage    = "☝️ It looks like you don't have a Telegram @username yet. You don't need one to use this bot. However, to make better use of your new wallet, please set up a username in the [Telegram settings](https://telegram.org/faq#q-what-are-usernames-how-do-i-get-one). Then, enter /balance so the bot can update its record of you."
 )
 
 func (bot TipBot) startHandler(m *tb.Message) {
@@ -32,6 +33,10 @@ func (bot TipBot) startHandler(m *tb.Message) {
 	}
 	bot.telegram.Edit(walletCreationMsg, startWalletReadyMessage)
 	bot.balanceHandler(m)
+
+	if len(m.Sender.Username) == 0 {
+		bot.telegram.Send(m.Sender, startNoUsernameMessage, tb.NoPreview)
+	}
 	return
 }