diff --git a/bot.go b/bot.go
index bbda4c9..73f5ba1 100644
--- a/bot.go
+++ b/bot.go
@@ -81,7 +81,7 @@ func (bot *BotAPI) MakeRequest(endpoint string, params url.Values) (APIResponse,
 	return apiResp, nil
 }
 
-func (bot *BotAPI) MakeMessageRequest(endpoint string, params url.Values) (Message, error) {
+func (bot *BotAPI) makeMessageRequest(endpoint string, params url.Values) (Message, error) {
 	resp, err := bot.MakeRequest(endpoint, params)
 	if err != nil {
 		return Message{}, err
@@ -169,14 +169,17 @@ func (bot *BotAPI) UploadFile(endpoint string, params map[string]string, fieldna
 	return apiResp, nil
 }
 
-func (this *BotAPI) GetFileDirectUrl(fileID string) (string, error) {
-	file, err := this.GetFile(FileConfig{fileID})
+// GetFileDirectURL returns direct URL to file
+//
+// Requires fileID
+func (bot *BotAPI) GetFileDirectURL(fileID string) (string, error) {
+	file, err := bot.GetFile(FileConfig{fileID})
 
 	if err != nil {
 		return "", err
 	}
 
-	return file.Link(this.Token), nil
+	return file.Link(bot.Token), nil
 }
 
 // GetMe fetches the currently authenticated bot.
@@ -198,10 +201,16 @@ func (bot *BotAPI) GetMe() (User, error) {
 	return user, nil
 }
 
+// IsMessageToMe returns true if message directed to this bot
+//
+// Requires message
 func (bot *BotAPI) IsMessageToMe(message Message) bool {
 	return strings.Contains(message.Text, "@"+bot.Self.UserName)
 }
 
+// Send will send event(Message, Photo, Audio, ChatAction, anything) to Telegram
+//
+// Requires Chattable
 func (bot *BotAPI) Send(c Chattable) (Message, error) {
 	switch c.(type) {
 	case Fileable:
@@ -225,7 +234,7 @@ func (bot *BotAPI) sendExisting(method string, config Fileable) (Message, error)
 		return Message{}, err
 	}
 
-	message, err := bot.MakeMessageRequest(method, v)
+	message, err := bot.makeMessageRequest(method, v)
 	if err != nil {
 		return Message{}, err
 	}
@@ -270,7 +279,7 @@ func (bot *BotAPI) sendChattable(config Chattable) (Message, error) {
 		return Message{}, err
 	}
 
-	message, err := bot.MakeMessageRequest(config.Method(), v)
+	message, err := bot.makeMessageRequest(config.Method(), v)
 
 	if err != nil {
 		return Message{}, err
@@ -359,6 +368,9 @@ func (bot *BotAPI) GetUpdates(config UpdateConfig) ([]Update, error) {
 	return updates, nil
 }
 
+// RemoveWebhook removes webhook
+//
+// There are no parameters for this method.
 func (bot *BotAPI) RemoveWebhook() (APIResponse, error) {
 	return bot.MakeRequest("setWebhook", url.Values{})
 }
@@ -393,7 +405,9 @@ func (bot *BotAPI) SetWebhook(config WebhookConfig) (APIResponse, error) {
 	return apiResp, nil
 }
 
-// UpdatesChan starts a channel for getting updates.
+// GetUpdatesChan starts and returns a channel for getting updates.
+//
+// Requires UpdateConfig
 func (bot *BotAPI) GetUpdatesChan(config UpdateConfig) (<-chan Update, error) {
 	updatesChan := make(chan Update, 100)
 
diff --git a/configs.go b/configs.go
index 0c82828..b687940 100644
--- a/configs.go
+++ b/configs.go
@@ -38,11 +38,13 @@ const (
 	ModeMarkdown = "Markdown"
 )
 
+//Chattable represents any event in chat(MessageConfig, PhotoConfig, ChatActionConfig and others)
 type Chattable interface {
 	Values() (url.Values, error)
 	Method() string
 }
 
+//Fileable represents any file event(PhotoConfig, DocumentConfig, AudioConfig, VoiceConfig, VideoConfig, StickerConfig)
 type Fileable interface {
 	Chattable
 	Params() (map[string]string, error)
@@ -51,7 +53,7 @@ type Fileable interface {
 	UseExistingFile() bool
 }
 
-// Base struct for all chat event(Message, Photo and so on)
+// BaseChat is base struct for all chat event(Message, Photo and so on)
 type BaseChat struct {
 	ChatID           int
 	ChannelUsername  string
@@ -59,6 +61,7 @@ type BaseChat struct {
 	ReplyMarkup      interface{}
 }
 
+// Values returns url.Values representation of BaseChat
 func (chat *BaseChat) Values() (url.Values, error) {
 	v := url.Values{}
 	if chat.ChannelUsername != "" {
@@ -83,6 +86,7 @@ func (chat *BaseChat) Values() (url.Values, error) {
 	return v, nil
 }
 
+// BaseFile is base struct for all file events(PhotoConfig, DocumentConfig, AudioConfig, VoiceConfig, VideoConfig, StickerConfig)
 type BaseFile struct {
 	BaseChat
 	FilePath    string
@@ -91,6 +95,7 @@ type BaseFile struct {
 	UseExisting bool
 }
 
+// Params returns map[string]string representation of BaseFile
 func (file BaseFile) Params() (map[string]string, error) {
 	params := make(map[string]string)
 
@@ -116,6 +121,7 @@ func (file BaseFile) Params() (map[string]string, error) {
 	return params, nil
 }
 
+// GetFile returns abstract representation of File inside BaseFile
 func (file BaseFile) GetFile() interface{} {
 	var result interface{}
 	if file.FilePath == "" {
@@ -127,6 +133,7 @@ func (file BaseFile) GetFile() interface{} {
 	return result
 }
 
+// UseExistingFile returns true if BaseFile contains already uploaded file by FileID
 func (file BaseFile) UseExistingFile() bool {
 	return file.UseExisting
 }
@@ -140,6 +147,7 @@ type MessageConfig struct {
 	ReplyMarkup           interface{}
 }
 
+// Values returns url.Values representation of MessageConfig
 func (config MessageConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 	v.Add("text", config.Text)
@@ -151,6 +159,7 @@ func (config MessageConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Method returns Telegram API method name for sending Message
 func (config MessageConfig) Method() string {
 	return "SendMessage"
 }
@@ -163,6 +172,7 @@ type ForwardConfig struct {
 	MessageID           int
 }
 
+// Values returns url.Values representation of ForwardConfig
 func (config ForwardConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 	v.Add("from_chat_id", strconv.Itoa(config.FromChatID))
@@ -170,6 +180,7 @@ func (config ForwardConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Method returns Telegram API method name for sending Forward
 func (config ForwardConfig) Method() string {
 	return "forwardMessage"
 }
@@ -180,6 +191,7 @@ type PhotoConfig struct {
 	Caption string
 }
 
+// Params returns map[string]string representation of PhotoConfig
 func (config PhotoConfig) Params() (map[string]string, error) {
 	params, _ := config.BaseFile.Params()
 
@@ -190,6 +202,7 @@ func (config PhotoConfig) Params() (map[string]string, error) {
 	return params, nil
 }
 
+// Values returns url.Values representation of PhotoConfig
 func (config PhotoConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 
@@ -200,10 +213,12 @@ func (config PhotoConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Name return field name for uploading file
 func (config PhotoConfig) Name() string {
 	return "photo"
 }
 
+// Method returns Telegram API method name for sending Photo
 func (config PhotoConfig) Method() string {
 	return "SendPhoto"
 }
@@ -216,6 +231,7 @@ type AudioConfig struct {
 	Title     string
 }
 
+// Values returns url.Values representation of AudioConfig
 func (config AudioConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 
@@ -234,6 +250,7 @@ func (config AudioConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Params returns map[string]string representation of AudioConfig
 func (config AudioConfig) Params() (map[string]string, error) {
 	params, _ := config.BaseFile.Params()
 
@@ -251,10 +268,12 @@ func (config AudioConfig) Params() (map[string]string, error) {
 	return params, nil
 }
 
+// Name return field name for uploading file
 func (config AudioConfig) Name() string {
 	return "audio"
 }
 
+// Method returns Telegram API method name for sending Audio
 func (config AudioConfig) Method() string {
 	return "SendAudio"
 }
@@ -264,6 +283,7 @@ type DocumentConfig struct {
 	BaseFile
 }
 
+// Values returns url.Values representation of DocumentConfig
 func (config DocumentConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 
@@ -272,16 +292,19 @@ func (config DocumentConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Params returns map[string]string representation of DocumentConfig
 func (config DocumentConfig) Params() (map[string]string, error) {
 	params, _ := config.BaseFile.Params()
 
 	return params, nil
 }
 
+// Name return field name for uploading file
 func (config DocumentConfig) Name() string {
 	return "document"
 }
 
+// Method returns Telegram API method name for sending Document
 func (config DocumentConfig) Method() string {
 	return "sendDocument"
 }
@@ -291,6 +314,7 @@ type StickerConfig struct {
 	BaseFile
 }
 
+// Values returns url.Values representation of StickerConfig
 func (config StickerConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 
@@ -299,16 +323,19 @@ func (config StickerConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Params returns map[string]string representation of StickerConfig
 func (config StickerConfig) Params() (map[string]string, error) {
 	params, _ := config.BaseFile.Params()
 
 	return params, nil
 }
 
+// Name return field name for uploading file
 func (config StickerConfig) Name() string {
 	return "sticker"
 }
 
+// Method returns Telegram API method name for sending Sticker
 func (config StickerConfig) Method() string {
 	return "sendSticker"
 }
@@ -320,6 +347,7 @@ type VideoConfig struct {
 	Caption  string
 }
 
+// Values returns url.Values representation of VideoConfig
 func (config VideoConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 
@@ -334,16 +362,19 @@ func (config VideoConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Params returns map[string]string representation of VideoConfig
 func (config VideoConfig) Params() (map[string]string, error) {
 	params, _ := config.BaseFile.Params()
 
 	return params, nil
 }
 
+// Name return field name for uploading file
 func (config VideoConfig) Name() string {
 	return "video"
 }
 
+// Method returns Telegram API method name for sending Video
 func (config VideoConfig) Method() string {
 	return "sendVideo"
 }
@@ -354,6 +385,7 @@ type VoiceConfig struct {
 	Duration int
 }
 
+// Values returns url.Values representation of VoiceConfig
 func (config VoiceConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 
@@ -365,6 +397,7 @@ func (config VoiceConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Params returns map[string]string representation of VoiceConfig
 func (config VoiceConfig) Params() (map[string]string, error) {
 	params, _ := config.BaseFile.Params()
 
@@ -375,10 +408,12 @@ func (config VoiceConfig) Params() (map[string]string, error) {
 	return params, nil
 }
 
+// Name return field name for uploading file
 func (config VoiceConfig) Name() string {
 	return "voice"
 }
 
+// Method returns Telegram API method name for sending Voice
 func (config VoiceConfig) Method() string {
 	return "sendVoice"
 }
@@ -390,6 +425,7 @@ type LocationConfig struct {
 	Longitude float64
 }
 
+// Values returns url.Values representation of LocationConfig
 func (config LocationConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 
@@ -399,6 +435,7 @@ func (config LocationConfig) Values() (url.Values, error) {
 	return v, nil
 }
 
+// Method returns Telegram API method name for sending Location
 func (config LocationConfig) Method() string {
 	return "sendLocation"
 }
@@ -409,12 +446,14 @@ type ChatActionConfig struct {
 	Action string
 }
 
+// Values returns url.Values representation of ChatActionConfig
 func (config ChatActionConfig) Values() (url.Values, error) {
 	v, _ := config.BaseChat.Values()
 	v.Add("action", config.Action)
 	return v, nil
 }
 
+// Method returns Telegram API method name for sending ChatAction
 func (config ChatActionConfig) Method() string {
 	return "sendChatAction"
 }
diff --git a/types.go b/types.go
index f2eb920..26a950b 100644
--- a/types.go
+++ b/types.go
@@ -113,10 +113,12 @@ func (m *Message) IsGroup() bool {
 	return m.From.ID != m.Chat.ID
 }
 
+// IsCommand returns true if message starts from /
 func (m *Message) IsCommand() bool {
 	return m.Text != "" && m.Text[0] == '/'
 }
 
+// Command returns first word from message
 func (m *Message) Command() string {
 	return strings.Split(m.Text, " ")[0]
 }