eth_getLogs - Scroll

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

This method returns an array of all logs matching a given filter object in a single call. It is the primary method for querying event logs from smart contracts, essential for tracking token transfers, DEX swaps, and other on-chain events.

Parameters

Parameter	Type	Required	Description
filterObject	object	Yes	Filter criteria object

Filter Object

Field	Type	Required	Description
fromBlock	string	No	Start block in hex, or "latest"
toBlock	string	No	End block in hex, or "latest"
address	string | array	No	Contract address(es) to match
topics	array	No	Ordered topic filters (null matches any position)
blockHash	string	No	Restrict to a single block by hash (mutually exclusive with from/toBlock)

Request

cURL

curl --location --request POST 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_getLogs",
    "params": [{ "fromBlock": "0x14b8a10", "toBlock": "0x14b8b10", "address": "0x4200000000000000000000000000000000000006", "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"] }],
    "id": "getblock.io"
}'

Axios

example.js

const axios = require('axios');

const response = await axios.post('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'eth_getLogs',
    params: [{ fromBlock: '0x14b8a10', toBlock: '0x14b8b10', address: '0x4200000000000000000000000000000000000006', topics: ['0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'] }],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);

Request

example.py

import requests

response = requests.post(
    'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'eth_getLogs',
        'params': [{ 'fromBlock': '0x14b8a10', 'toBlock': '0x14b8b10', 'address': '0x4200000000000000000000000000000000000006', 'topics': ['0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'] }],
        'id': 'getblock.io'
    }
)

print(response.json())

Rust

example.rs

use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let response = client
        .post("https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "eth_getLogs",
            "params": [{ "fromBlock": "0x14b8a10", "toBlock": "0x14b8b10", "address": "0x4200000000000000000000000000000000000006", "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"] }],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

    println!("Result: {}", response["result"]);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": [
        {
            "address": "0x4200000000000000000000000000000000000006",
            "blockNumber": "0x14b8a10",
            "transactionHash": "0x3c8a1f5b2d9e4076c1a8b3d5e7f9021436587a9cbdef012345678abcdef901234",
            "logIndex": "0x0",
            "topics": [
                "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
            ],
            "data": "0x"
        }
    ]
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	array	Array of log objects matching the filter

Use Cases

• Token Transfers: Track ERC-20 Transfer events by topic and address

• DEX Activity: Index swap and liquidity events from AMM pools

• Indexing: Backfill contract events over a block range

• Analytics: Aggregate on-chain events for dashboards

Error Handling

Error Code	Message	Description
-32602	Invalid params	Malformed filter object or block range
-32005	Limit exceeded	The requested block range or result set is too large
-32603	Internal error	The node failed to assemble the logs

Web3 Integration

Ethers.js

ethers-example.js

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/');

const logs = await provider.getLogs({ address: '0x4200000000000000000000000000000000000006', topics: ['0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'], fromBlock: 21727760 });

Viem

viem-example.js

import { createPublicClient, http } from 'viem';

const client = createPublicClient({
  transport: http('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/')
});

const logs = await client.getLogs({ address: '0x4200000000000000000000000000000000000006', fromBlock: 21727760n });