eth_getTransactionByBlockNumberAndIndex - TRON

Discover 'eth_getTransactionByBlockNumberAndIndex' in the Tron JSON-RPC API Interface for efficient transaction retrieval.

Description

The 'eth_getTransactionByBlockNumberAndIndex' Web3 method is a pivotal function in the Tron protocol, allowing users to retrieve transaction details using the block number and index position. This method is part of the eth_getTransactionByBlockNumberAndIndex RPC protocol, providing a streamlined approach to access specific transaction data within a block. By specifying the block number and the transaction index, developers can efficiently query transaction information, enhancing the ability to interact with the blockchain. This function is integral to applications requiring precise data retrieval, ensuring seamless integration and interaction with the Tron network's JSON-RPC API Interface.

Supported Networks

The eth_getTransactionByBlockNumberAndIndex RPC method supports the following network types

• Mainnet

• Testnets

Parameters

Here is the list of parameters the eth_getTransactionByBlockNumberAndIndex method needs to be executed.

• Block Number (required)

  • Type: String (Hexadecimal)

  • Description: The block number from which the transaction should be retrieved. It should be specified in hexadecimal format.

  • Example Value: "0xfb82f0"

• Transaction Index (required)

  • Type: String (Hexadecimal)

  • Description: The index position of the transaction within the block. It should be specified in hexadecimal format.

  • Example Value: "0x0"

URL

https://go.getblock.io/<ACCESS-TOKEN>/

Here’s a sample cURL request using eth_getTransactionByBlockNumberAndIndex

Request

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/jsonrpc' 
--header 'Content-Type: application/json' 
{"jsonrpc": "2.0", "method": "eth_getTransactionByBlockNumberAndIndex", "params": ["0xfb82f0", "0x0"], "id": "getblock.io"}

Response

{
  "jsonrpc": "2.0",
  "id": "getblock.io",
  "result": {
    "blockHash": "0x0000000000fb82f05796bf90b99ca9a63c10d81a90359c105d852b1706f0c8a4",
    "blockNumber": "0xfb82f0",
    "from": "0x6b42ddf9b8a89725c063212e4de6a039341e7b3c",
    "gas": "0x1d58",
    "gasPrice": "0x8c",
    "hash": "0x1a2578ff17a1f9b36539a413fdaa69a05e10c08eab93f0982eb7d9c19d447c30",
    "input": "0x095ea7b30000000000000000000000003e6057d51efe7ffc196d448f45908542fb7b966d0000000000000000000000000000000000000000000000000de0b6b3a7640000",
    "nonce": "0x0000000000000000",
    "r": "0xd863a5a31687fd29858592f7428ea358e74db337ac9731713424b135cf2bafc5",
    "s": "0xd6166bd5848bad141a2c31219f69d94a44a53ab3fe30c09ca9b1716bfbcbcf73",
    "to": "0x7ae53cb5ea53ba2d9a719ba499805372c99da46d",
    "transactionIndex": "0x0",
    "type": "0x0",
    "v": "0x1b",
    "value": "0x0"
  }

Body Parameters

Here is the list of body parameters for the eth_getTransactionByBlockNumberAndIndex method:

1. blockHash: The hash of the block containing the transaction. In this case, it is "0x0000000000fb82f05796bf90b99ca9a63c10d81a90359c105d852b1706f0c8a4".

2. blockNumber: The number of the block containing the transaction. Here, it is "0xfb82f0".

3. from: The address of the sender of the transaction. This is "0x6b42ddf9b8a89725c063212e4de6a039341e7b3c".

4. gas: The gas provided by the sender for the transaction execution. In this response, it is "0x1d58".

5. gasPrice: The price of gas for the transaction. It is "0x8c" in this instance.

6. hash: The hash of the transaction. This is "0x1a2578ff17a1f9b36539a413fdaa69a05e10c08eab93f0982eb7d9c19d447c30".

7. input: The data sent along with the transaction. Here, it is "0x095ea7b30000000000000000000000003e6057d51efe7ffc196d448f45908542fb7b966d0000000000000000000000000000000000000000000000000de0b6b3a7640000".

8. nonce: The number of transactions made by the sender prior to this one. It is "0x0000000000000000" in this response.

9. r: The ECDSA signature r value. This is "0xd863a5a31687fd29858592f7428ea358e74db337ac9731713424b135cf2bafc5".

10. s: The ECDSA signature s value. It is "0xd6166bd5848bad141a2c31219f69d94a44a53ab3fe30c09ca9b1716bfbcbcf73".

11. to: The address of the receiver of the transaction. In this case, it is "0x7ae53cb5ea53ba2d9a719ba499805372c99da46d".

12. transactionIndex: The index of the transaction within the block. It is "0x0" in this response.

13. type: The type of transaction. Here, it is "0x0".

14. v: The ECDSA recovery id. This is "0x1b".

15. value: The amount of Ether transferred with the transaction. It is "0x0" in this instance.

Use Case

Here are some use-cases for the eth_getTransactionByBlockNumberAndIndex method:

1. Transaction Monitoring and Analysis: This method is useful for developers and analysts who need to monitor transactions within a specific block on the Ethereum blockchain. By specifying the block number and the transaction index, developers can retrieve detailed information about a particular transaction. This can be particularly useful for auditing purposes, tracking the flow of funds, or analyzing transaction patterns within a block for insights or anomaly detection.

2. Building DApps with Transaction Histories: Decentralized applications (DApps) may require access to historical transaction data to provide users with detailed transaction histories or to verify transactions that have occurred on the blockchain. By using eth_getTransactionByBlockNumberAndIndex, developers can fetch specific transactions, allowing them to build features that display transaction details to users, such as confirmations, sender and receiver addresses, and the amount transferred.

3. Debugging and Testing Smart Contracts: When developing and testing smart contracts, developers often need to verify the outcomes of transactions to ensure that their contracts behave as expected. This method allows developers to pinpoint and retrieve specific transactions within a block, enabling them to inspect transaction inputs and outputs, gas usage, and other relevant data. This detailed information is crucial for debugging and optimizing smart contracts during the development process.

Code for eth_getTransactionByBlockNumberAndIndex

import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"
headers = {
    "Content-Type": "application/json"
}
payload = {"jsonrpc": "2.0", "method": "eth_getTransactionByBlockNumberAndIndex", "params": ["0xfb82f0", "0x0"], "id": "getblock.io"}

response = requests.post(url, headers=headers, data=json.dumps(payload))

# Check the response and print the result
if response.status_code == 200:
    print("Result:", response.json().get("result"))
else:
    print("Error:", response.status_code, response.text)

Common Errors

Common Errors When using the eth_getTransactionByBlockNumberAndIndex RPC Tron method, the following issues may occur:

• Incorrect Block Number Format: If the block number is not provided in hexadecimal format, the request will fail. Ensure that the block number is correctly formatted as a hexadecimal string prefixed with '0x'.

• Invalid Index Value: Providing an index that is out of bounds for the specified block will result in an error. Verify that the index is within the range of available transactions in the block.

• Network Connectivity Issues: Network disruptions can lead to failed requests or timeouts. Ensure stable network connectivity and consider implementing retry logic for enhanced reliability.

• Node Synchronization Lag: If the node you are querying is not fully synchronized with the network, it may return outdated or incomplete data. Use a well-synchronized node to obtain accurate transaction details.

Using the eth_getTransactionByBlockNumberAndIndex method in Web3 applications allows developers to access specific transaction data efficiently by referencing both the block number and transaction index. This precise querying capability is crucial for applications that require detailed transaction analysis and tracking, enhancing the overall functionality and reliability of blockchain-based solutions.

conclusion

The eth_getTransactionByBlockNumberAndIndex RPC method is used to retrieve a specific transaction from the Ethereum blockchain by specifying the block number and the transaction index within that block. This method is crucial for developers and applications that need to access transaction details efficiently. While similar RPC methods exist for other blockchain platforms like Tron, eth_getTransactionByBlockNumberAndIndex is specifically tailored for the Ethereum ecosystem, highlighting its unique role in Ethereum's transaction retrieval processes.