eth_newFilter

POST

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

Creates a filter object based on filter options ({fromBlock, toBlock, address, topics}) to notify when the state changes (logs). Use eth_getFilterChanges to poll it.

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

Connection URL:

Copied!

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

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

Example:

Copied!

wscat -c 'wss://linea.nownodes.io/wss/YOUR_API_KEY.'
> {"jsonrpc":"2.0","method":"eth_newFilter","id":73,"params":[{"fromBlock":"0x1","toBlock":"0x2","address":"0x8888f1f195afa192cfee860698584c030f4c9db1","topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",null,["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b","0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"]]}]}

Copied!

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

Body

application/json

object

Parameters

api_keystringrequiredpath

Your NOWNodes API key.

Response

200OK

A successful response.

eth_newFilter

curl -X POST 'wss://linea.nownodes.io/wss/{api_key}.' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_newFilter",
    "id": 73,
    "params": [
      {
        "fromBlock": "0x1",
        "toBlock": "0x2",
        "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
        "topics": [
          "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
          null,
          [
            "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
            "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
          ]
        ]
      }
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("wss://linea.nownodes.io/wss/{api_key}.");
const result = await provider.send("eth_newFilter", [
  {
    "fromBlock": "0x1",
    "toBlock": "0x2",
    "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
    "topics": [
      "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
      null,
      [
        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
      ]
    ]
  }
]);
console.log(result);

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

uri = URI('wss://linea.nownodes.io/wss/{api_key}.')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_newFilter",
  "params": [
    {
      "fromBlock": "0x1",
      "toBlock": "0x2",
      "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
      "topics": [
        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        null,
        [
          "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
          "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
        ]
      ]
    }
  ],
  "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://linea.nownodes.io/wss/{api_key}."))
response = w3.provider.make_request("eth_newFilter", [
  {
    "fromBlock": "0x1",
    "toBlock": "0x2",
    "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
    "topics": [
      "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
      null,
      [
        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
      ]
    ]
  }
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "eth_newFilter",
  params: [
  {
    "fromBlock": "0x1",
    "toBlock": "0x2",
    "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
    "topics": [
      "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
      null,
      [
        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
      ]
    ]
  }
],
});

console.log(result);

const endpoint = "wss://linea.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_newFilter", params: [
  {
    "fromBlock": "0x1",
    "toBlock": "0x2",
    "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
    "topics": [
      "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
      null,
      [
        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
      ]
    ]
  }
], id: 1 });
console.log(result);

const response = await fetch('wss://linea.nownodes.io/wss/{api_key}.', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "eth_newFilter",
      "id": 73,
      "params": [
        {
          "fromBlock": "0x1",
          "toBlock": "0x2",
          "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
          "topics": [
            "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
            null,
            [
              "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
              "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
            ]
          ]
        }
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "eth_newFilter",
  "id": 73,
  "params": [
    {
      "fromBlock": "0x1",
      "toBlock": "0x2",
      "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
      "topics": [
        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        null,
        [
          "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
          "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
        ]
      ]
    }
  ]
}

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

require 'net/http'
require 'json'

uri = URI('wss://linea.nownodes.io/wss/{api_key}.')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "eth_newFilter",
    "id": 73,
    "params": [
      {
        "fromBlock": "0x1",
        "toBlock": "0x2",
        "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
        "topics": [
          "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
          null,
          [
            "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
            "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
          ]
        ]
      }
    ]
  }'

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_newFilter",
  "id": 73,
  "params": [
    {
      "fromBlock": "0x1",
      "toBlock": "0x2",
      "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
      "topics": [
        "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
        null,
        [
          "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
          "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"
        ]
      ]
    }
  ]
}

200

{
  "jsonrpc": "2.0",
  "id": 73,
  "result": "0xcee1fa075b18c4fd1b8e58fe6bbc9594"
}