eth_newPendingTransactionFilter | BNB Chain

BNB API method that creates a filter that listens for new pending transactions on the blockchain. It returns a filter ID, which can be used to retrieve the results using the eth_getFilterChanges method. The eth_newBlockFilter method is useful for developers who must be notified of new blocks on the blockchain in real-time.


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  • none


  • result — a hexadecimal string representing the ID of the newly created filter

Code examples


The filters created are stored on the blockchain client instance. The filter is automatically deleted if not polled within a certain time (5 minutes by default).

Use the following methods with the filter ID:

eth_newPendingTransactionFilter code examples


Note that the web3.eth.filter methods have been deprecated and replaced with the web3.eth.subscribe in web3.js. See web3.js subscriptions.

const ethers = require('ethers');
const provider = new ethers.JsonRpcProvider(NODE_URL);

const createFilter = async () => {
  try {
    const filterId = await provider.send('eth_newPendingTransactionFilter', []);
    console.log(filterId); // the filter ID returned by eth_newFilter
    return filterId
  } catch (error) {

from web3 import Web3  
web3 = Web3(Web3.HTTPProvider(node_url))

def get_new_pending_transactions():
        blocks_filter = web3.eth.filter('pending')

        # Split the string at the space character
        parts = str(blocks_filter).split(' ')

        # Extract the filter value from the second part
        filter_id = parts[2]

        return filter_id
    except Exception as e:

new_filter = get_new_pending_transactions()

Use case

One way to use the eth_newPendingTransactionFilter method is to listen for new pending transactions at predefined intervals and extract specific data from them. For instance, a decentralized application might check for pending transactions every second and identify those that transfer a value greater than a certain amount of the ETH token. This could be useful for real-time monitoring high-value transactions or detecting potential fraud or security threats.

Try the eth_newPendingTransactionFilter RPC method yourself

Click Try It! to start a request and see the response here!