eth_newFilter - SEI

Example code for the eth_newFilter JSON-RPC method. Complete guide on how to use eth_newFilter JSON-RPC in GetBlock Web3 documentation.

Creates a new log filter on the Sei network to notify when state changes match the filter criteria. Returns a filter ID.

Parameters

Parameter	Type	Description
filter	object	Filter object with 'fromBlock', 'toBlock', 'address', 'topics' fields

Request

cURL

cURL

curl --location 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data '{
    "jsonrpc": "2.0",
    "method": "eth_newFilter",
    "params": [{"fromBlock": "latest", "address": "0x1234567890abcdef1234567890abcdef12345678", "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"]}],
    "id": "getblock.io"
}'

JavaScript (axios)

Python (requests)

Rust (reqwest)

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x1"
}

Response Parameters

Field	Type	Description
result	string	The filter ID

Use Case

The eth_newFilter method is essential for:

• Blockchain developers building applications on Sei

• Wallet applications requiring network data

• Analytics platforms tracking Sei network activity

• DeFi protocols integrating with Sei's parallelized EVM

Error Handling

Common errors when using this method:

Error Code	Message	Description
-32700	Parse error	Invalid JSON
-32600	Invalid Request	JSON is not a valid request object
-32601	Method not found	Method does not exist
-32602	Invalid params	Invalid method parameters
-32603	Internal error	Internal JSON-RPC error
-32000	Invalid input	Generic input error
-32500	Cross-VM error	Error in cross-VM operation (Sei-specific)

Web3 Integration

Ethers.js

Ethers.js

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

// Using ethers provider methods
const result = await provider.send('eth_newFilter', [{"fromBlock": "latest", "address": "0x1234567890abcdef1234567890abcdef12345678", "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"]}]);
console.log(result);

Viem