Event

(Websocket) Events

Subscribe to events generated by vechain smart contracts. Events are created using the LOG opcode in the Ethereum Virtual Machine (EVM).

Example:

// Filter the events by 'Transfer(address,address,uint256)'
const ws = new WebSocket('ws://localhost:8669/subscriptions/event?t0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef')

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

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

Query parameters

Response

200400403

OK

Body

application/json

addressstring

The address of the contract that produces the event (bytes20).

Example: "0x0000000000000000000000000000456e65726779"

Pattern: ^0x[0-9a-f]{40}$

topicsarray of string

Topics are indexed parameters to an event. The first topic is always the event signature.

datastring

The data associated with the event.

Example: "0x4de71f2d588aa8a1ea00fe8312d92966da424d9939a511fc0be81e65fad52af8"

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

obsoleteboolean

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

Example: false

metaLogMeta

The event or transfer log metadata such as block number, block timestamp, etc.

Request

JavaScriptCurlPython

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

Response

200400403

{
  "address": "0x0000000000000000000000000000456e65726779",
  "topics": [
    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
    "0x000000000000000000000000435933c8064b4ae76be665428e0307ef2ccfbd68"
  ],
  "data": "0x4de71f2d588aa8a1ea00fe8312d92966da424d9939a511fc0be81e65fad52af8",
  "obsolete": false,
  "meta": {
    "blockID": "0x0004f6cc88bb4626a92907718e82f255b8fa511453a78e8797eb8cea3393b215",
    "blockNumber": 325324,
    "blockTimestamp": 1533267900,
    "txID": "0x284bba50ef777889ff1a367ed0b38d5e5626714477c40de38d71cedd6f9fa477",
    "txOrigin": "0xdb4027477b2a8fe4c83c6dafe7f86678bb1b8a8d",
    "clauseIndex": 0
  }
}