Imports github.com/BurntSushi/toml github.com/dchest/captcha github.com/go-telegram-bot-api/telegram-bot-api github.com/patrickmn/go-cache github.com/prometheus/client_golang/prometheus github.com/prometheus/client_golang/prometheus/promhttp Standard library imports bytes crypto/sha1 encoding/json errors fmt image/png io io/ioutil log math/rand net/http net/url os os/user path/filepath regexp sort strconv strings sync time unicode