eth_getFilterChanges

POST

wss://blast.nownodes.io/wss/{api_key}.

Polling method for a filter, returning an array of logs (log filters) or block/transaction hashes (block / pending-transaction filters) which occurred since the last poll.

Sent as a JSON text message over the WebSocket connection wss://blast.nownodes.io/wss/{{api-key}}.

Connection URL:

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wss://blast.nownodes.io/wss/{{api_key}}.

Open the connection, then send the message below as a text frame.

Example:

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wscat -c 'wss://blast.nownodes.io/wss/YOUR_API_KEY.'
> {"jsonrpc":"2.0","method":"eth_getFilterChanges","id":73,"params":["0x16"]}

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wss://blast.nownodes.io/wss/{{api-key}}

Body

application/json

object

Parameters

api_keystringrequiredpath

Your NOWNodes API key.

Response

200OK

A successful response.

eth_getFilterChanges

curl -X POST 'wss://blast.nownodes.io/wss/{api_key}.' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getFilterChanges",
    "id": 73,
    "params": [
      "0x16"
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("wss://blast.nownodes.io/wss/{api_key}.");
const result = await provider.send("eth_getFilterChanges", [
  "0x16"
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('wss://blast.nownodes.io/wss/{api_key}.')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_getFilterChanges",
  "params": [
    "0x16"
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("wss://blast.nownodes.io/wss/{api_key}."))
response = w3.provider.make_request("eth_getFilterChanges", [
  "0x16"
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("wss://blast.nownodes.io/wss/{api_key}."),
});

const result = await client.request({
  method: "eth_getFilterChanges",
  params: [
  "0x16"
],
});

console.log(result);

const endpoint = "wss://blast.nownodes.io/wss/{api_key}.";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "eth_getFilterChanges", params: [
  "0x16"
], id: 1 });
console.log(result);

const response = await fetch('wss://blast.nownodes.io/wss/{api_key}.', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "eth_getFilterChanges",
      "id": 73,
      "params": [
        "0x16"
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "eth_getFilterChanges",
  "id": 73,
  "params": [
    "0x16"
  ]
}

response = requests.post('wss://blast.nownodes.io/wss/{api_key}.', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('wss://blast.nownodes.io/wss/{api_key}.')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "eth_getFilterChanges",
    "id": 73,
    "params": [
      "0x16"
    ]
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "method": "eth_getFilterChanges",
  "id": 73,
  "params": [
    "0x16"
  ]
}

200

{
  "jsonrpc": "2.0",
  "id": 73,
  "error": {
    "code": -32000,
    "message": "filter not found"
  }
}