> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# jsonrpc eth_getFilterChanges | TRON

> TRON API method that polls for filter changes and returns new logs or blocks. This method provides Ethereum-compatible interface for TRON blockchain.

TRON API method that polls for changes on a previously created filter and returns new logs or block hashes, providing an Ethereum-compatible interface for monitoring TRON blockchain data.

## Parameters

* `jsonrpc` — the JSON-RPC protocol version (always "2.0")
* `method` — the method name (always "eth\_getFilterChanges")
* `params` — array containing method parameters
  * `filterId` — the filter ID returned by eth\_newFilter or eth\_newBlockFilter
* `id` — request identifier (number or string)

## Response

* `jsonrpc` — the JSON-RPC protocol version ("2.0")
* `id` — the request identifier that matches the request
* `result` — array of log objects (for log filters) or block hashes (for block filters)

## Use case

The `jsonrpc eth_getFilterChanges` method is used for:

* Polling for new logs or blocks that match previously created filter criteria
* Building efficient event monitoring systems that check for updates periodically
* Implementing real-time dApp functionality through Web3 interfaces without constant re-filtering
* Creating blockchain monitoring applications that track specific events or block production


## OpenAPI

````yaml openapi/tron_node_api/jsonrpc_eth_getFilterChanges.json POST /95e61622bf6a8af293978377718e3b77/jsonrpc
openapi: 3.0.0
info:
  title: eth_getFilterChanges example
  version: 1.0.0
  description: >-
    This is an API example for eth_getFilterChanges, a method to poll for filter
    changes and return new logs or blocks on the TRON network through
    Ethereum-compatible JSON-RPC interface.
servers:
  - url: https://tron-mainnet.core.chainstack.com
security: []
paths:
  /95e61622bf6a8af293978377718e3b77/jsonrpc:
    post:
      tags:
        - TRON JSON-RPC Operations
      summary: eth_getFilterChanges
      operationId: getFilterChanges
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - jsonrpc
                - method
                - id
                - params
              properties:
                jsonrpc:
                  type: string
                  default: '2.0'
                method:
                  type: string
                  default: eth_getFilterChanges
                id:
                  type: integer
                  default: 71
                params:
                  type: array
                  default:
                    - >-
                      0xc11a84d5e906ecb9f5c1eb65ee940b154ad37dce8f5ac29c80764508b901d996
                  items:
                    type: string
                    description: >-
                      The filter ID returned by eth_newFilter or
                      eth_newBlockFilter
      responses:
        '200':
          description: Array of log objects or block hashes since last poll
          content:
            application/json:
              schema:
                type: object
                properties:
                  jsonrpc:
                    type: string
                  id:
                    type: integer
                  result:
                    type: array
                    description: >-
                      Array of log objects (for log filters) or block hashes
                      (for block filters)
                    items: {}

````