firefly simple client for LINE bot API require >= PHP 7.0.0 Setup (on heroku) git clone https://github.com/b-kaxa/firefly.git cd firefly make index.php set ENV vars on heroku app > Settings > Config Variables your LINE_CHANNEL_ID your LINE_CHANNEL_MID your LINE_CHANNEL_SECRET your PROXY_URL (add add-on 'fixie' to your app) set IP whitelist on LINE developers deploy to heroku Usage in preparation T