eth_getTransactionByBlockHashAndIndex - Arbitrum

Example code for the eth_getTransactionByBlockHashAndIndex JSON RPC method. Сomplete guide on how to use eth_getTransactionByBlockHashAndIndex JSON RPC in GetBlock Web3 documentation.

This method returns information about a transaction at a given index within a block, identified by its block hash. This method helps developers inspect specific transactions without having to scan the entire block.

Parameters

Parameter

Type

Required

Description

block_hash

string

yes

The block hash used to locate the block containing the transaction.

index

string (hex)

yes

The transaction index position within the block, encoded as a hex integer (e.g. "0x0", "0x2").

Request

curl --location 'https://go.getblock.us/<ACCESS_TOKEN>' \
--header 'Content-Type: application/json' \
--data '{
   "jsonrpc": "2.0",
       "method": "eth_getTransactionByBlockHashAndIndex",
 "params": [
"0xf5524f0cf99ac6bc5905e95294ebed9007e2d978155f3457118eb7a26d97503a",
"0x0"
    ],
    "id": "getblock.io"
}'

import axios from 'axios'
let data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "eth_getTransactionByBlockHashAndIndex",
 "params": [
"0xf5524f0cf99ac6bc5905e95294ebed9007e2d978155f3457118eb7a26d97503a",
"0x0"
    ],
    "id": "getblock.io"
};

let config = {
  method: "post",
  maxBodyLength: Infinity,
  url: "https://go.getblock.us/<ACCESS_TOKEN>",
  headers: {
    "Content-Type": "application/json",
  },
  data: data,
};

axios
  .request(config)
  .then((response) => {
    console.log(JSON.stringify(response.data));
  })
  .catch((error) => {
    console.log(error);
  });

import requests
import json

url = "https://go.getblock.us/<ACESS_TOKEN>"

payload = json.dumps({
   "jsonrpc": "2.0",
    "method": "eth_getTransactionByBlockHashAndIndex",
 "params": [
"0xf5524f0cf99ac6bc5905e95294ebed9007e2d978155f3457118eb7a26d97503a",
"0x0"
    ],
    "id": "getblock.io"
})
headers = {
  'Content-Type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

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

    let mut headers = reqwest::header::HeaderMap::new();
    headers.insert("Content-Type", "application/json".parse()?);

    let data = r#"{
   "jsonrpc": "2.0",
       "method": "eth_getTransactionByBlockHashAndIndex",
 "params": [
"0xf5524f0cf99ac6bc5905e95294ebed9007e2d978155f3457118eb7a26d97503a",
"0x0"
    ],
    "id": "getblock.io"
}"#;

    let json: serde_json::Value = serde_json::from_str(&data)?;

    let request = client.request(reqwest::Method::POST, "https://go.getblock.us/<ACCESS_TOKEN>")
        .headers(headers)
        .json(&json);

    let response = request.send().await?;
    let body = response.text().await?;

    println!("{}", body);

    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "blockHash": "0xf5524f0cf99ac6bc5905e95294ebed9007e2d978155f3457118eb7a26d97503a",
        "blockNumber": "0x5206d53",
        "from": "0x00000000000000000000000000000000000a4b05",
        "gas": "0x0",
        "gasPrice": "0x0",
        "hash": "0xaf256a9ce8839489dcaa4f9a2740bcd5865b3db34a15434cce29e6bdcf043bc7",
        "input": "0x6bf6a42d0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000105e0460000000000000000000000000000000000000000000000000000000005206d530000000000000000000000000000000000000000000000000000000000000000",
        "nonce": "0x0",
        "to": "0x00000000000000000000000000000000000a4b05",
        "transactionIndex": "0x0",
        "value": "0x0",
        "type": "0x6a",
        "chainId": "0xa4b1",
        "v": "0x0",
        "r": "0x0",
        "s": "0x0"
    }
}

Reponse Parameter Definition

Field

Type

Description

hash

string

Transaction hash

blockHash

string

Hash of the block this transaction belongs to

blockNumber

string (hex)

Block number

from

string

Address that initiated the transaction

string or null

Recipient address or null for contract creation

value

string (hex)

Amount transferred in wei

nonce

string (hex)

Number of transactions sent by the sender

gas

string (hex)

Gas limit

gasPrice

string (hex)

Gas price in wei

input

string (hex)

Transaction calldata

transactionIndex

string (hex)

Index of this transaction in the block

v, r, s

string

Signature fields

Use case

The eth_getTransactionByBlockHashAndIndex is used to:

Fetch transactions in the exact order they appear in a block
Supports debugging by locating problematic transactions in a specific block
Helps indexers reconstruct historical transaction sequences
Used by wallets to verify whether their transaction was included and at what position
Supports analytics tools that measure block activity density

Error handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid ACCESS_TOKEN.

-32602

Invalid argument

The block hash does not exist
Index is not a proper hex integer
Block does have transaction at that index

Integration with Web3

The eth_getTransactionByBlockHashAndIndex method helps developers to:

Build richer block explorers that display ordered transaction lists
Generate analytics around transaction distribution inside blocks
Debug transactions by locating their exact place in the block
Power DeFi dashboards and monitoring tools that react to specific activity
Build trustless frontends that fetch live block data without running a node

import { ethers } from "ethers";
const RPC_URL = "https://go.getblock.us/<ACCESS_TOKEN>";
const provider = new ethers.JsonRpcProvider(RPC_URL);
async function Call() {
  try {
     const result = await provider.send("eth_getTransactionByBlockHashAndIndex",
     [
"0xf5524f0cf99ac6bc5905e95294ebed9007e2d978155f3457118eb7a26d97503a",
"0x0"
    ]);    
console.log("The result:", result);
    return result;
  } catch (error) {
    console.error("The error:", error);
    throw error;
  }
}

import { createPublicClient, http } from 'viem';
import { arbitrum } from 'viem/chains';

// Create Viem client with GetBlock
const client = createPublicClient({
  chain: arbitrum,
  transport: http('https://go.getblock.us/<ACCESS_TOKEN>'),
});

// Using the method through Viem
async function Call() {
    try {
        // Method-specific Viem implementation
        const result = await client.request({
        method: "eth_getTransactionByBlockHashAndIndex",
 params: [
"0xf5524f0cf99ac6bc5905e95294ebed9007e2d978155f3457118eb7a26d97503a",
"0x0"
    ]
        });
        console.log('Result:', result);
        return result;
    } catch (error) {
        console.error('Viem Error:', error);
        throw error;
    }
}

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