Beat

(Websocket) Subscribe to Blockchain Beats

Establish a websocket connection to receive blockchain beats, which contain a summary of new blocks and bloom filters composited with affected addresses.

Example:

const ws = new WebSocket('ws://localhost:8669/subscriptions/beat')

ws.onmessage = (event) => {
  console.log(event.data)
}

GEThttps://vet.nownodes.io/subscriptions/beat

Query parameters

Response

Body

obsoleteboolean

Indicates whether the block containing this data has become obsolete (true) or not (false).

Example: false

numberinteger (uint32)

The block number (height)

Example: 325324

idstring (hex)

The block identifier

Example: "0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215"

Pattern: ^0x[0-9a-f]{64}$

parentIDstring (hex)

The parent block identifier

Example: "0x0004f6cb730dbd90fed09d165bfdf33cc0eed47ec068938f6ee7b7c12a4ea98d"

Pattern: ^0x[0-9a-f]{64}$

timestampinteger (uint64)

The UNIX timestamp of the block

Example: 1533267900

txsFeaturesinteger (uint32)

The supported transaction features bitset

Example: 0

bloomstring (hex)

A hexadecimal representation of the bloom filter composed with affected addresses & topics. The bloom filter is used to efficiently check whether an element is a member of a set, providing a summary of affected addresses related to new blocks.

Example: "0x0424c1ff47029280"

Pattern: ^0x[0-9a-f]*$

kinteger (uint32)

The number of hash functions for bloom filter

Example: 13

Request

const response = await fetch('https://vet.nownodes.io/subscriptions/beat', {
    method: 'GET',
    headers: {},
});
const data = await response.json();

Response

{
  "obsolete": false,
  "number": 325324,
  "id": "0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215",
  "parentID": "0x0004f6cb730dbd90fed09d165bfdf33cc0eed47ec068938f6ee7b7c12a4ea98d",
  "timestamp": 1533267900,
  "txsFeatures": 0,
  "bloom": "0x0424c1ff47029280",
  "k": 13
}