UI Goodies examples repository

https://github.com/bitfinexcom/bfx-stuff-ui : small examples to master Bitfinex UI Goodies

Chart Marks

Overview

Chart markers allow you to display certain events, such as important news, on the Bitfinex UI chart. All markers are associated with a specific timestamp which determines the candle above which the mark will be shown.

API

Chart markers can be manipulated with websocket messages:

Create a new mark

wss.send(JSON.stringify([0, 'n', 12345, {
  type: 'ucm-ui-chart',
  info: {
    type: 'marker_create',
    id: 'mark_0',
    ts: Date.now(), // timestamp in milliseconds
    symbol: 'tBTCUSD', // not required. If not present applies to all symbols
		content: 'lorem <a href="https://www.bitfinex.com/assets/bfx-stacked.png">here</a>', // content to show in tooltip
    color_bg: '#FF1133', // RGB
    color_text: '#FF1133', // RGB
    color_border: '#FF1133', // RGB
    label: 'M', // marker letter
    size_min: 8,
  } 
}]))

Clear all existing marks

wss.send(JSON.stringify([0, 'n', 12345, {
  type: 'ucm-ui-chart', info: {
  type: 'marker_clear',
} }]))

Fields

Name	Type	Required	Description
type	String, one of [‘marker_create’, ‘marker_clear’][‘marker_create’, ‘marker_clear’]	yes	The type of the action
id	string	yes	Unique id of the mark. It’s necessary to allow the UI to distinguish the marks, and to easily determine that the given mark is already added to the chart in a possible scenario in which the same mark is broadcasted multiple times.
ts	number	yes	Unix timestamp in milliseconds of the event. The mark of the event will be associated with the candle that overlaps with this moment in time.
symbol	string	no	Symbol that the mark applies to e.g. “tBTCUSD”. If not provided, or provided value is “ANY” the mark applies to each existing pair.
content	string(HTML)	no	HTML content displayed in the tooltip. Tooltip appears on mark hover and disappears on mark blur. This library is used to sanitize HTML to prevent potentially malicious tags from being injected: https://www.npmjs.com/package/sanitize-html
color_bg	string	no	Background color of the mark. Must be in a form of RGB color such as “#FF0099”
color_border	string	no	Border color of the mark. Must be in a form of RGB color such as “#FF0099”
color_text	string	no	Text color of the mark. Must be in a form of RGB color such as “#FF0099”. Should not be confused with tooltip text color. (See “label” below)
label	string with length = 1	no	Optional single char that is displayed inside the mark circle when it’s zoomed in enough. Note: chart marks tend to become smaller when zooming out, and become bigger when zooming in. See also “size_min”.
size_min	number	no	Minimum mark size in pixels. See also “label” above.

HTML Sanitize settings

Definition of allowed HTML tags and attributes

const SANITIZE_SETTINGS = {
 allowedTags: ['h3', 'h4', 'h5', 'h6', 'blockquote', 'p', 'a', 'ul', 'ol',
   'li', 'b', 'i', 'strong', 'em', 'code', 'hr', 'br', 'div',
   'table', 'thead', 'caption', 'tbody', 'tr', 'th', 'td', 'pre', 'img'],
 allowedAttributes: {
   a: ['href', 'name', 'target'],
   img: ['src', 'height', 'width'],
 },
}

Custom Notifications

Broadcasts a custom notification to all connected websockets belonging to the authenticated user.

Fields

Name	Description
message	Notification content
type	all, browser, desktop
level	success, info, warning, error
image	URL to any image (not supported for desktop notifications on macOS)
link	URL to open when notification is clicked
title	Header content
ttl	Time in milliseconds to display notification for
sound: { tone: TONE }	TONE=tone\|wob\|tripleChime\| tripleBeep\|doubleTap\|pingUp\| pingDown

Functionality

Display entire message content
Play a sound, if provided, according to the specified user setting or provided tone (see structure above)
Display an image, if provided, underneath the message content
If a link is provided, the notification should open the link
Display the title, if provided, above the message
Close after either the provided TTL or the default

wss.send(JSON.stringify([0, 'n', 12345, {
  type: 'ucm-notify-ui', info: {
  type: 'all',
  level: 'success',
  image: 'https://www.bitfinex.com/assets/bfx-stacked.png',
  link: 'http://www.bitfinex.com',
  message: 'This is a test notification',
  sound: {
     tone: 'pingUp',
  }
} }]))

2216 — Chart Markers + Custom notifications from Twitter