telebot/examples/awslambdaechobot/README.md

This example shows how to write an echo telebot for AWS Lambda and how to launch it using Terraform.

This bot is different from a typical bot in two ways:

1. It is configured with Settings.Synchronous = true. This disables asynchronous handlers to let Lambda wait for their completion:

   b, _ := tele.NewBot(tele.Settings{Token: token, Synchronous: true})
   

2. Instead of Settings.Poller and bot.Start it calls bot.ProcessUpdate inside lambda.Start:

   lambda.Start(func(req events.APIGatewayProxyRequest) (err error) {
       var u tele.Update
       if err = json.Unmarshal([]byte(req.Body), &u); err == nil {
           b.ProcessUpdate(u)
       }
       return
   })
   

To launch the bot install Terraform, run ./init.sh and then ./deploy.sh. To tear down the cloud infrastructure run terraform destroy.