eth_getFilterChanges RPC Method

Parameters

filterID

string

REQUIRED

The filter id that is returned from eth_newFilter, eth_newBlockFilter or eth_newPendingTransactionFilter

Returns

array

An array of one of the following, depending on the filter type, or empty if there were no changes since the last poll:

eth_newBlockFilter

blockHash

The 32 byte hash of a block that meets your filter requirements

eth_newPendingTransactionFilter

transactionHash

The 32 byte hash of a transaction that meets your filter requirements

eth_newFilter

The 32 byte hash of a transaction that meets your filter requirements

address

An address from which this log originated

topics

An array of zero to four 32 Bytes DATA of indexed log arguments. In Solidity, the first topic is the hash of the signature of the event (e.g. Deposit(address, bytes32, uint256)), except you declare the event with the anonymous specifier

data

It contains one or more 32 Bytes non-indexed arguments of the log

blockNumber

The block number where this log was in. null when its a pending log

transactionHash

The hash of the transactions this log was created from. null when its a pending log

transactionIndex

The integer of the transaction's index position that the log was created from. null when it's a pending log

blockHash

The hash of the block where this log was in. null when its a pending log

logIndex

The integer of the log index position in the block. null when it's a pending log

removed

It is true when the log was removed due to a chain reorganization, and false if it's a valid log

Request

curl https://docs-demo.quiknode.pro/ \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"method":"eth_getFilterChanges","params":["YOUR_FILTER_ID"],"id":1,"jsonrpc":"2.0"}'

require 'eth'

client = Eth::Client.create 'https://docs-demo.quiknode.pro/'
payload = {
    "jsonrpc": "2.0",
    "method": "eth_getFilterChanges",
    "params": ["YOUR_FILTER_ID"],
    "id": "1"
}

response = client.send(payload.to_json)
puts response

import { ethers } from "ethers";
(async () => {
  const provider = new ethers.JsonRpcProvider("https://docs-demo.quiknode.pro/");
  const logs = await provider.send("eth_getFilterChanges", ["YOUR_FILTER_ID"]);
  console.log(logs);
})();

var myHeaders = new Headers();
myHeaders.append("Content-Type", "application/json");

var raw = JSON.stringify({
  "method": "eth_getFilterChanges",
  "params": [
    "YOUR_FILTER_ID"
  ],
  "id": 1,
  "jsonrpc": "2.0"
});

var requestOptions = {
  method: 'POST',
  headers: myHeaders,
  body: raw,
  redirect: 'follow'
};

fetch("https://docs-demo.quiknode.pro/", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

import requests
import json

url = "https://docs-demo.quiknode.pro/"

payload = json.dumps({
  "method": "eth_getFilterChanges",
  "params": [
    "YOUR_FILTER_ID"
  ],
  "id": 1,
  "jsonrpc": "2.0"
})
headers = {
  'Content-Type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

require "uri"
require "json"
require "net/http"

url = URI("https://docs-demo.quiknode.pro/")

https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = "application/json"
request.body = JSON.dump({
  "method": "eth_getFilterChanges",
  "params": [
    "YOUR_FILTER_ID"
  ],
  "id": 1,
  "jsonrpc": "2.0"
})

response = https.request(request)
puts response.read_body

from web3 import Web3, HTTPProvider
w3 = Web3(HTTPProvider('https://docs-demo.quiknode.pro/'))
put_filter = w3.eth.filter('YOUR_FILTER_ID')
print(w3.eth.get_filter_changes(put_filter.filter_id))

import { Core } from '@quicknode/sdk'

const core = new Core({
  endpointUrl: "https://docs-demo.quiknode.pro/",
})

/**
 * Can listen for filter changes on filters created with the following functions
 * createBlockFilter
 * createContractEventFilter
 * createEventFilter
 * createPendingTransactionFilter
 */
async(() => {
  const filter = await core.client.createBlockFilter()
  const hashes = await core.client.getFilterChanges({ filter })
})()

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