# eth\_getBlockByNumber - Base

The `eth_getBlockByNumber` method returns information about a block by block number. This method is essential for block explorers, indexers, and applications that need to process blockchain data sequentially.

## Parameters

| Parameter        | Type    | Required | Description                                                                          |
| ---------------- | ------- | -------- | ------------------------------------------------------------------------------------ |
| blockNumber      | string  | Yes      | Block number in hex, or "latest", "earliest", "pending"                              |
| fullTransactions | boolean | Yes      | If true, returns full transaction objects; if false, returns only transaction hashes |

## Request

{% tabs %}
{% tab title="cURL" %}

```bash
curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_getBlockByNumber",
    "params": ["latest", false],
    "id": "getblock.io"
}'
```

{% endtab %}

{% tab title="Axios (JavaScript)" %}
{% code title="example.js" %}

```javascript
const axios = require('axios');

const response = await axios.post('https://go.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'eth_getBlockByNumber',
    params: ['latest', true],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

const block = response.data.result;
console.log('Block Number:', parseInt(block.number, 16));
console.log('Transactions:', block.transactions.length);
```

{% endcode %}
{% endtab %}

{% tab title="Requests (Python)" %}
{% code title="example.py" %}

```python
import requests

response = requests.post(
    'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'eth_getBlockByNumber',
        'params': ['latest', True],
        'id': 'getblock.io'
    }
)

result = response.json()
block = result['result']
print(f'Block Number: {int(block["number"], 16)}')
print(f'Timestamp: {int(block["timestamp"], 16)}')
print(f'Transactions: {len(block["transactions"])}')
```

{% endcode %}
{% endtab %}

{% tab title="Rust" %}
{% code title="main.rs" %}

```rust
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://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "eth_getBlockByNumber",
            "params": ["latest", false],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;
    
    println!("Block: {}", serde_json::to_string_pretty(&response["result"])?);
    Ok(())
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

## Response

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "number": "0x12d687f",
        "hash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
        "parentHash": "0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890",
        "nonce": "0x0000000000000000",
        "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
        "logsBloom": "0x00000000000000000000000000000000...",
        "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "stateRoot": "0xd5855eb08b3387c0af375e9cdb6acfc05eb8f519e419b874b6ff2ffda7ed1dff",
        "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "miner": "0x4200000000000000000000000000000000000011",
        "difficulty": "0x0",
        "totalDifficulty": "0x0",
        "extraData": "0x",
        "size": "0x220",
        "gasLimit": "0x1c9c380",
        "gasUsed": "0x5208",
        "timestamp": "0x64a1b2c3",
        "transactions": [],
        "uncles": [],
        "baseFeePerGas": "0x5f5e100"
    }
}
```

## Response Parameters

| Parameter     | Type   | Description                            |
| ------------- | ------ | -------------------------------------- |
| number        | string | Block number in hex                    |
| hash          | string | 32-byte block hash                     |
| parentHash    | string | 32-byte parent block hash              |
| timestamp     | string | Unix timestamp of block creation       |
| transactions  | array  | Array of transaction hashes or objects |
| gasUsed       | string | Total gas used by all transactions     |
| gasLimit      | string | Maximum gas allowed in block           |
| baseFeePerGas | string | EIP-1559 base fee per gas              |
| miner         | string | Address of the sequencer               |
| size          | string | Size of the block in bytes             |

## Use Cases

1. Block Explorer: Display block details and transaction lists.
2. Chain Indexing: Process blocks sequentially for data indexing.
3. Transaction Analysis: Examine all transactions in a specific block.
4. Historical Data: Query blocks at specific heights for analysis.
5. Real-time Monitoring: Poll for new blocks and process transactions.

## Error Handling

| Error Code | Message         | Description                     |
| ---------- | --------------- | ------------------------------- |
| -32602     | Invalid params  | Invalid block number format     |
| -32603     | Internal error  | Block not found or node failure |
| -32600     | Invalid request | Malformed JSON-RPC request      |

## Web3 Integration

{% tabs %}
{% tab title="Ethers.js (v6)" %}
{% code title="ethers-example.js" %}

```javascript
const { ethers } = require('ethers');

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

async function getBlock(blockNumber = 'latest') {
    const block = await provider.getBlock(blockNumber);
    
    console.log('Block Number:', block.number);
    console.log('Hash:', block.hash);
    console.log('Timestamp:', new Date(block.timestamp * 1000));
    console.log('Transactions:', block.transactions.length);
    console.log('Gas Used:', block.gasUsed.toString());
    console.log('Base Fee:', ethers.formatUnits(block.baseFeePerGas, 'gwei'), 'gwei');
    
    return block;
}

getBlock();
```

{% endcode %}
{% endtab %}

{% tab title="Viem" %}
{% code title="viem-example.js" %}

```javascript
import { createPublicClient, http } from 'viem';
import { base } from 'viem/chains';

const client = createPublicClient({
    chain: base,
    transport: http('https://go.getblock.io/<ACCESS-TOKEN>/')
});

async function getBlock(blockNumber = 'latest') {
    const block = await client.getBlock({
        blockNumber: blockNumber === 'latest' ? undefined : BigInt(blockNumber),
        includeTransactions: false
    });
    
    console.log('Block Number:', block.number);
    console.log('Hash:', block.hash);
    console.log('Timestamp:', new Date(Number(block.timestamp) * 1000));
    console.log('Transactions:', block.transactions.length);
    
    return block;
}

getBlock();
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.getblock.io/api-reference/base/eth_getblockbynumber-base.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.