Imports github.com/pkg/errors go.uber.org/multierr github.com/mailgun/mailgun-go/v4 github.com/k3a/html2text github.com/go-telegram-bot-api/telegram-bot-api Standard library imports bytes context encoding/base64 encoding/json fmt io net/http strconv strings sync sync/atomic time crypto/hmac crypto/sha256 text/template