Telegram bot

• Create .env file with the following entries:

BOT_TOKEN=<YOUR BOT TOKEN ID>
HELIX_PROVIDER=<YOUR HELIX PROVIDER>

• Put your AWS API credentials to ~/.aws/credentials
• Deploy AWS lambda function and connect to Gateway API as explained here
• For local testing put your test response for the Telegram API to test-tg-message.json and run lambda-local-test.js
• The messages will appear in your bot chat

• set the environment variable BOT_WEBHOOK to bot's webhook (that is, your AWS Gateway endpoint, registered as described in Telegram docs)

• run test_curl.sh

• Obtain BOT_TOKEN from the Bot Father as explained in API
• Create AWS Gateway endpoint and integrate with AWS Lambda function as explained here
• Package the sources into a zip archive

zip -FSr deploy.zip *.js package-lock.json node_modules

• Update your AWS lambda function

aws lambda update-function-code --function-name <lambda-func-name> --zip-file fileb://deploy.zip

A more robust way to develop and deploy is by using serverless framework.