Imports github.com/labstack/echo/v4 github.com/labstack/echo/v4/middleware github.com/line/line-bot-sdk-go/linebot github.com/lxbot/lxlib github.com/mitchellh/mapstructure Standard library imports bytes crypto/hmac crypto/sha256 encoding/base64 encoding/gob io/ioutil log net/http os runtime strconv time