TelegramClient

• Usage
• Methods
  • Webhook API
  • Send API
  • Get API
  • Updating API
  • Group API
  • Payments API
  • Inline Mode API
  • Game API
  • Others
• Debug Tips
• Test

Usage

Get the TelegramClient instance using the getClient function:

const { getClient } = require('bottender');

const client = getClient('telegram');

// `client` is a `TelegramClient` instance
const webhookInfo = await client.getWebhookInfo();

Or, get the TelegramClient instance from the context:

async function MyAction(context) {
  if (context.platform === 'telegram') {
    // `context.client` is a `TelegramClient` instance
    const webhookInfo = await context.client.getWebhookInfo();
  }
}

Error Handling

TelegramClient uses axios as HTTP client. We use axios-error package to wrap API error instances for better formatting error messages. Calling console.log with the error instance returns the formatted message. If you'd like to get the axios request, response, or config, you can still get them via those keys on the error instance.

client.getWebhookInfo().catch((error) => {
  console.log(error); // the formatted error message
  console.log(error.stack); // stack trace of the error
  console.log(error.config); // axios request config
  console.log(error.request); // axios HTTP request
  console.log(error.response); // axios HTTP response
});

Methods

All methods return a Promise.

Webhook API

getWebhookInfo - Official Docs

Gets current webhook status.

Example:

client.getWebhookInfo().then((info) => {
  console.log(info);
  // {
  //   url: 'https://4a16faff.ngrok.io/',
  //   hasCustomCertificate: false,
  //   pendingUpdateCount: 0,
  //   maxConnections: 40,
  // }
});

getUpdates - Official Docs

Use this method to receive incoming updates using long polling. An Array of Update objects is returned.

Param	Type	Description
options	Object	Optional parameters.

Example:

client
  .getUpdates({
    limit: 10,
  })
  .then((updates) => {
    console.log(updates);
    /*
      [
        {
          updateId: 513400512,
          message: {
            messageId: 3,
            from: {
              id: 313534466,
              firstName: 'first',
              lastName: 'last',
              username: 'username',
            },
            chat: {
              id: 313534466,
              firstName: 'first',
              lastName: 'last',
              username: 'username',
              type: 'private',
            },
            date: 1499402829,
            text: 'hi',
          },
        },
        ...
      ]
    */
  });

setWebhook(url) - Official Docs

Specifies a url and receive incoming updates via an outgoing webhook.

Param	Type	Description
url	String	HTTPS url to send updates to.

Example:

client.setWebhook('https://4a16faff.ngrok.io/');

deleteWebhook - Official Docs

Removes webhook integration.

Example:

client.deleteWebhook();

Send API - Official Docs

sendMessage(chatId, text [, options]) - Official Docs

Sends text messages.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
text	String	Text of the message to be sent.
options	Object	Other optional parameters.

Example:

client.sendMessage(CHAT_ID, 'hi', {
  disableWebPagePreview: true,
  disableNotification: true,
});

sendPhoto(chatId, photo [, options]) - Official Docs

Sends photos.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
photo	String	Pass a file id (recommended) or HTTP URL to send photo.
options	Object	Other optional parameters.

Example:

client.sendPhoto(CHAT_ID, 'https://example.com/image.png', {
  caption: 'gooooooodPhoto',
  disableNotification: true,
});

sendAudio(chatId, audio [, options]) - Official Docs

Sends audio files.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
audio	String	Pass a file id (recommended) or HTTP URL to send audio.
options	Object	Other optional parameters.

Example:

client.sendAudio(CHAT_ID, 'https://example.com/audio.mp3', {
  caption: 'gooooooodAudio',
  disableNotification: true,
});

sendDocument(chatId, document [, options]) - Official Docs

Sends general files.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
document	String	Pass a file id (recommended) or HTTP URL to send document.
options	Object	Other optional parameters.

Example:

client.sendDocument(CHAT_ID, 'https://example.com/doc.gif', {
  caption: 'gooooooodDocument',
  disableNotification: true,
});

sendSticker(chatId, sticker [, options]) - Official Docs

Sends .webp stickers.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
sticker	String	Pass a file id (recommended) or HTTP URL to send sticker.
options	Object	Other optional parameters.

Example:

client.sendSticker(CHAT_ID, 'CAADAgADQAADyIsGAAE7MpzFPFQX5QI', {
  disableNotification: true,
});

sendVideo(chatId, video [, options]) - Official Docs

Sends video files, Telegram clients support mp4 videos (other formats may be sent as Document).

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
video	String	Pass a file id (recommended) or HTTP URL to send video.
options	Object	Other optional parameters.

Example:

client.sendVideo(CHAT_ID, 'https://example.com/video.mp4', {
  caption: 'gooooooodVideo',
  disableNotification: true,
});

sendVoice(chatId, voice [, options]) - Official Docs

Sends audio files.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
voice	String	Pass a file id (recommended) or HTTP URL to send voice.
options	Object	Other optional parameters.

Example:

client.sendVoice(CHAT_ID, 'https://example.com/voice.ogg', {
  caption: 'gooooooodVoice',
  disableNotification: true,
});

sendVideoNote(chatId, videoNote [, options]) - Official Docs

Sends video messages. As of v.4.0, Telegram clients support rounded square mp4 videos of up to 1 minute long.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
videoNote	String	Pass a file id (recommended) or HTTP URL to send video note.
options	Object	Other optional parameters.

Example:

client.sendVideoNote(CHAT_ID, 'https://example.com/video_note.mp4', {
  duration: 40,
  disableNotification: true,
});

sendMediaGroup(chatId, media [, options]) - Official Docs

send a group of photos or videos as an album.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
media	Array<InputMedia>	A JSON-serialized array describing photos and videos to be sent, must include 2–10 items
options	Object	Other optional parameters.

Example:

client.sendMediaGroup(CHAT_ID, [
  { type: 'photo', media: 'BQADBAADApYAAgcZZAfj2-xeidueWwI' },
]);

sendLocation(chatId, location [, options]) - Official Docs

Sends point on the map.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
location	Object	Object contains latitude and longitude.
location.latitude	Number	Latitude of the location.
location.longitude	Number	Longitude of the location.
options	Object	Other optional parameters.

Example:

client.sendLocation(
  CHAT_ID,
  {
    latitude: 30,
    longitude: 45,
  },
  {
    disableNotification: true,
  }
);

sendVenue(chatId, venue [, options]) - Official Docs

Sends information about a venue.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
venue	Object	Object contains information of the venue.
venue.latitude	Number	Latitude of the venue.
venue.longitude	Number	Longitude of the venue.
venue.title	String	Name of the venue.
venue.address	String	Address of the venue.
options	Object	Other optional parameters.

Example:

client.sendVenue(
  CHAT_ID,
  {
    latitude: 30,
    longitude: 45,
    title: 'a_title',
    address: 'an_address',
  },
  {
    disableNotification: true,
  }
);

sendContact(chatId, contact [, options]) - Official Docs

Sends phone contacts.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
contact	Object	Object contains information of the contact.
contact.phoneNumber	String	Phone number of the contact.
contact.firstName	String	First name of the contact.
options	Object	Other optional parameters.

Example:

client.sendContact(
  CHAT_ID,
  {
    phoneNumber: '886123456789',
    firstName: 'first',
  },
  { lastName: 'last' }
);

sendChatAction(chatId, action) - Official Docs

Tells the user that something is happening on the bot's side.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
action	String	Type of action to broadcast.

Example:

client.sendChatAction(CHAT_ID, 'typing');

Get API

getMe - Official Docs

Gets bot's information.

Example:

client.getMe().then((result) => {
  console.log(result);
  // {
  //   id: 313534466,
  //   firstName: 'first',
  //   username: 'a_bot'
  // }
});

getUserProfilePhotos(userId [, options]) - Official Docs

Gets a list of profile pictures for a user.

Param	Type	Description
userId	String	Unique identifier of the target user.
options	Object	Other optional parameters

Example:

client.getUserProfilePhotos(USER_ID, { limit: 1 }).then((result) => {
  console.log(result);
  // {
  //   totalCount: 3,
  //   photos: [
  //     [
  //       {
  //         fileId:
  //           'AgADBAADGTo4Gz8cZAeR-ouu4XBx78EeqRkABHahi76pN-aO0UoDA050',
  //         fileSize: 14650,
  //         width: 160,
  //         height: 160,
  //       },
  //       {
  //         fileId:
  //           'AgADBAADGTo4Gz8cZAeR-ouu4XBx78EeqRkABKCfooqTgFUX0EoD5B1C',
  //         fileSize: 39019,
  //         width: 320,
  //         height: 320,
  //       },
  //       {
  //         fileId:
  //           'AgADBAADGTo4Gz8cZAeR-ouu4XBx78EeqRkABPL_pC9K3UpI0koD1B1C',
  //         fileSize: 132470,
  //         width: 640,
  //         height: 640,
  //       },
  //     ],
  //   ],
  // }
});

getFile(fileId) - Official Docs

Gets basic info about a file and prepare it for downloading.

Param	Type	Description
fileId	String	File identifier to get info about.

Example:

client
  .getFile('UtAqweADGTo4Gz8cZAeR-ouu4XBx78EeqRkABPL_pM4A1UpI0koD65K2')
  .then((file) => {
    console.log(file);
    // {
    //   fileId: 'UtAqweADGTo4Gz8cZAeR-ouu4XBx78EeqRkABPL_pM4A1UpI0koD65K2',
    //   fileSize: 106356,
    //   filePath: 'photos/1068230105874016297.jpg',
    // }
  });

getFileLink(fileId)

Gets link of the file.

Param	Type	Description
fileId	String	File identifier to get info about.

Example:

client
  .getFileLink('UtAqweADGTo4Gz8cZAeR-ouu4XBx78EeqRkABPL_pM4A1UpI0koD65K2')
  .then((link) => {
    console.log(link);
    // 'https://api.telegram.org/file/bot<ACCESS_TOKEN>/photos/1068230105874016297.jpg'
  });

getChat(chatId) - Official Docs

Gets up to date information about the chat (current name of the user for one-on-one conversations, current username of a user, group or channel, etc.)

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.getChat(CHAT_ID).then((chat) => {
  console.log(chat);
  // {
  //   id: 313534466,
  //   firstName: 'first',
  //   lastName: 'last',
  //   username: 'username',
  //   type: 'private',
  // }
});

getChatAdministrators(chatId) - Official Docs

Gets a list of administrators in a chat.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.getChatAdministrators(CHAT_ID).then((admins) => {
  console.log(admins);
  // [
  //   {
  //     user: {
  //       id: 313534466,
  //       firstName: 'first',
  //       lastName: 'last',
  //       username: 'username',
  //       languangeCode: 'zh-TW',
  //     },
  //     status: 'creator',
  //   },
  // ]
});

getChatMembersCount(chatId) - Official Docs

Gets the number of members in a chat.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.getChatMembersCount(CHAT_ID).then((count) => {
  console.log(count); // '6'
});

getChatMember(chatId, userId) - Official Docs

Gets information about a member of a chat.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
userId	Number	Unique identifier of the target user.

Example:

client.getChatMember(CHAT_ID, USER_ID).then((member) => {
  console.log(member);
  // {
  //   user: {
  //     id: 313534466,
  //     firstName: 'first',
  //     lastName: 'last',
  //     username: 'username',
  //     languangeCode: 'zh-TW',
  //   },
  //   status: 'creator',
  // }
});

Updating API

editMessageText(text [, options]) - Official Docs

Edits text and game messages sent by the bot or via the bot (for inline bots).

Param	Type	Description
text	String	New text of the message.
options	Object	One of chatId, messageId or inlineMessageId is required.
options.chatId	Number | String	Unique identifier for the target chat or username of the target channel.
options.messageId	Number	Identifier of the sent message.
options.inlineMessageId	String	Identifier of the inline message.

Example:

client.editMessageText('new_text', { messageId: MESSAGE_ID });

editMessageCaption(caption [, options]) - Official Docs

Edits captions of messages sent by the bot or via the bot (for inline bots).

Param	Type	Description
caption	String	New caption of the message.
options	Object	One of chatId, messageId or inlineMessageId is required.
options.chatId	Number | String	Unique identifier for the target chat or username of the target channel.
options.messageId	Number	Identifier of the sent message.
options.inlineMessageId	String	Identifier of the inline message.

Example:

client.editMessageCaption('new_caption', { messageId: MESSAGE_ID });

editMessageReplyMarkup(replyMarkup [, options]) - Official Docs

Edits only the reply markup of messages sent by the bot or via the bot (for inline bots).

Param	Type	Description
replyMarkup	Object	New replyMarkup of the message.
options	Object	One of chatId, messageId or inlineMessageId is required.
options.chatId	Number | String	Unique identifier for the target chat or username of the target channel.
options.messageId	Number	Identifier of the sent message.
options.inlineMessageId	String	Identifier of the inline message.

Example:

client.editMessageReplyMarkup(
  {
    keyboard: [[{ text: 'new_button_1' }, { text: 'new_button_2' }]],
    resizeKeyboard: true,
    oneTimeKeyboard: true,
  },
  { messageId: MESSAGE_ID }
);

deleteMessage(chatId, messageId) - Official Docs

Deletes a message, including service messages.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
messageId	Number	Identifier of the message to delete.

Example:

client.deleteMessage(CHAT_ID, MESSAGE_ID);

editMessageLiveLocation(location [, options]) - Official Docs

Edit live location messages sent by the bot or via the bot (for inline bots).

Param	Type	Description
location	Object	Object contains new latitude and longitude.
location.latitude	Number	Latitude of new location.
location.longitude	Number	Longitude of new location.
options	Object	One of chatId, messageId or inlineMessageId is required.
options.chatId	Number | String	Unique identifier for the target chat or username of the target channel.
options.messageId	Number	Identifier of the sent message.
options.inlineMessageId	String	Identifier of the inline message.

Example:

client.editMessageLiveLocation(
  {
    latitude: 30,
    longitude: 45,
  },
  {
    messageId: MESSAGE_ID,
  }
);

stopMessageLiveLocation(options) - Official Docs

Stop updating a live location message sent by the bot or via the bot (for inline bots) before live_period expires.

Param	Type	Description
identifier	Object	One of chatId, messageId or inlineMessageId is required.
identifier.chatId	Number | String	Unique identifier for the target chat or username of the target channel.
identifier.messageId	Number	Identifier of the sent message.
identifier.inlineMessageId	String	Identifier of the inline message.

Example:

client.stopMessageLiveLocation({ messageId: MESSAGE_ID });

Group API

kickChatMember(chatId, userId [, options]) - Official Docs

Kicks a user from a group, a supergroup or a channel.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
userId	Number	Unique identifier of the target user.
options	Object	Other optional parameters.

Example:

client.kickChatMember(CHAT_ID, USER_ID, { untilDate: UNIX_TIME });

unbanChatMember(chatId, userId) - Official Docs

Unbans a previously kicked user in a supergroup or channel.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
userId	Number	Unique identifier of the target user.

Example:

client.unbanChatMember(CHAT_ID, USER_ID);

restrictChatMember(chatId, userId [, options]) - Official Docs

Restricts a user in a supergroup

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
userId	Number	Unique identifier of the target user.
options	Object	Other optional parameters.

Example:

client.restrictChatMember(CHAT_ID, USER_ID, { canSendMessages: true });

promoteChatMember(chatId, userId [, options]) - Official Docs

Promotes or demotes a user in a supergroup or a channel.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
userId	Number	Unique identifier of the target user.
options	Object	Other optional parameters.

Example:

client.promoteChatMember(CHAT_ID, USER_ID, {
  canChangeInfo: true,
  canInviteUsers: true,
});

exportChatInviteLink(chatId) - Official Docs

Exports an invite link to a supergroup or a channel.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.exportChatInviteLink(CHAT_ID);

setChatPhoto(chatId, photo) - Official Docs

Sets a new profile photo for the chat.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
photo	String	Pass a file id (recommended) or HTTP URL to send photo.

Example:

client.setChatPhoto(CHAT_ID, 'https://example.com/image.png');

deleteChatPhoto(chatId) - Official Docs

Deletes a chat photo.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.deleteChatPhoto(CHAT_ID);

setChatTitle(chatId, title) - Official Docs

Changes the title of a chat.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
title	String	New chat title, 1-255 characters.

Example:

client.setChatTitle(CHAT_ID, 'New Title');

setChatDescription(chatId, description) - Official Docs

Changes the description of a supergroup or a channel.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
description	String	New chat description, 0-255 characters.

Example:

client.setChatDescription(CHAT_ID, 'New Description');

setChatStickerSet(chatId, stickerSetName) - Official Docs

Set a new group sticker set for a supergroup.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
stickerSetName	String	Name of the sticker set to be set as the group sticker set.

Example:

client.setChatStickerSet(CHAT_ID, 'Sticker Set Name');

deleteChatStickerSet(chatId) - Official Docs

Delete a group sticker set from a supergroup.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.deleteChatStickerSet(CHAT_ID);

pinChatMessage(chatId, messageId [, options]) - Official Docs

Pins a message in a supergroup.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
messageId	Number	Identifier of a message to pin.
options	Object	Other optional parameters.

Example:

client.pinChatMessage(CHAT_ID, MESSAGE_ID, { disableNotification: true });

unpinChatMessage(chatId) - Official Docs

Unpins a message in a supergroup chat.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.unpinChatMessage(CHAT_ID);

leaveChat(chatId) - Official Docs

Leaves a group, supergroup or channel.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.

Example:

client.leaveChat(CHAT_ID);

Payments API

sendInvoice(chatId, product [, options]) - Official Docs

Sends invoice.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
product	Object	Object of the product.
product.title	String	Product name.
product.description	String	Product description.
product.payload	String	Bot defined invoice payload.
product.providerToken	String	Payments provider token.
product.startParameter	String	Deep-linking parameter.
product.currency	String	Three-letter ISO 4217 currency code.
product.prices	Array<Object>	Breakdown of prices.
options	Object	Additional Telegram query options.

Example:

client.sendInvoice(CHAT_ID, {
  title: 'product name',
  description: 'product description',
  payload: 'bot-defined invoice payload',
  providerToken: 'PROVIDER_TOKEN',
  startParameter: 'pay',
  currency: 'USD',
  prices: [
    { label: 'product', amount: 11000 },
    { label: 'tax', amount: 11000 },
  ],
});

answerShippingQuery(shippingQueryId, ok [, options]) - Official Docs

Reply to shipping queries.

Param	Type	Description
shippingQueryId	String	Unique identifier for the query to be answered.
ok	Boolean	Specify if delivery of the product is possible.
options	Object	Additional Telegram query options.

Example:

client.answerShippingQuery('UNIQUE_ID', true);

answerPreCheckoutQuery(preCheckoutQueryId, ok [, options]) - Official Docs

Respond to such pre-checkout queries.

Param	Type	Description
preCheckoutQueryId	String	Unique identifier for the query to be answered.
ok	Boolean	Specify if delivery of the product is possible.
options	Object	Additional Telegram query options.

Example:

client.answerPreCheckoutQuery('UNIQUE_ID', true);

Inline mode API

answerInlineQuery(inlineQueryId, results [, options]) - Official Docs

Send answers to an inline query.

Param	Type	Description
inlineQueryId	String	Unique identifier of the query.
results	Array<InlineQueryResult>	Array of object represents one result of an inline query.
options	Object	Additional Telegram query options.

Example:

client.answerInlineQuery(
  'INLINE_QUERY_ID',
  [
    {
      type: 'photo',
      id: 'UNIQUE_ID',
      photoFileId: 'FILE_ID',
      title: 'PHOTO_TITLE',
    },
    {
      type: 'audio',
      id: 'UNIQUE_ID',
      audioFileId: 'FILE_ID',
      caption: 'AUDIO_TITLE',
    },
  ],
  {
    cacheTime: 1000,
  }
);

Game API

sendGame(chatId, gameShortName [, options]) - Official Docs

Sends a game.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target channel.
gameShortName	String	Short name of the game.
options	Object	Additional Telegram query options.

Example:

client.sendGame(CHAT_ID, 'Mario Bros.', {
  disableNotification: true,
});

setGameScore(userId, score [, options]) - Official Docs

Sets the score of the specified user in a game.

Param	Type	Description
userId	Number | String	User identifier.
score	Number	New score, must be non-negative.
options	Object	Additional Telegram query options.

Example:

client.setGameScore(USER_ID, 999);

getGameHighScores(userId [, options]) - Official Docs

Gets data for high score tables.

Param	Type	Description
userId	Number | String	User identifier.
options	Object	Additional Telegram query options.

Example:

client.getGameHighScores(USER_ID).then((scores) => {
  console.log(scores);
  // [
  //   {
  //     position: 1,
  //     user: {
  //       id: 427770117,
  //       isBot: false,
  //       firstName: 'first',
  //     },
  //     score: 999,
  //   },
  // ]
});

Others

forwardMessage(chatId, fromChatId, messageId [, options]) - Official Docs

Forwards messages of any kind.

Param	Type	Description
chatId	Number | String	Unique identifier for the target chat or username of the target supergroup or channel.
fromChatId	Number | String	Unique identifier for the chat where the original message was sent.
messageId	Number	Message identifier in the chat specified in fromChatId.
options	Object	Other optional parameters.

Example:

client.forwardMessage(CHAT_ID, USER_ID, MESSAGE_ID, {
  disableNotification: true,
});

Debug Tips

Log Requests Details

To enable default request debugger, use following DEBUG env variable:

DEBUG=messaging-api-telegram

Test

Send Requests to Your Dummy Server

To avoid sending requests to the real Telegram server, provide the origin option in your bottender.js.config file:

module.exports = {
  channels: {
    telegram: {
      enabled: true,
      path: '/webhooks/telegram',
      accessToken: process.env.TELEGRAM_ACCESS_TOKEN,
      origin:
        process.env.NODE_ENV === 'test'
          ? 'https://mydummytestserver.com'
          : undefined,
    },
  },
};

Warning: Don't do this on the production server.