Fetching Polygon Logs for an Address from a Block using `eth_getTransactionReceiptsByBlock` and web3.py
Using the web3.py library, this tool fetches transaction logs from the Polygon blockchain for a given Ethereum address in a specific block. It aids in efficient retrieval and analysis of transaction activities, ideal for debugging and monitoring.
Overview
Overview
With the web3.py library, this script connects to the Polygon blockchain via a Chainstack RPC node running BOR. It’s designed to fetch transaction logs from a particular block, specifically targeting logs related to a predefined Ethereum address. Leveraging the eth_getTransactionReceiptsByBlock
method, exclusive to the BOR node, this code provides a streamlined way to extract and display transaction details, making it a handy tool for developers and analysts monitoring specific addresses on the Polygon network.
Environment setup
Environment setup
Create a new directory for your project, then install the web3.py library:
pip install web3
Get your Chainstack endpoint
Get your Chainstack endpoint
You will need a Chainstack account and a Polygon full node to run this code.
The logic
The logic
The script connects to the Polygon network using the web3.py
library and targets a specific block. It fetches transaction receipts from this block and sifts through them to identify transactions related to a predefined Ethereum address. Relevant details from these transactions, including logs, are then extracted and displayed, providing a snapshot of the address’s activities within that block. Error handling mechanisms ensure smooth operation and user feedback in case of issues.
Create a new file
Create a new file
In your directory, create a new file named main.py
.
Imports and Constants
Imports and Constants
The script starts by importing necessary modules and defining constants.
Utility Functions
Utility Functions
These functions handle conversions between decimal and hexadecimal formats.
Log Extraction
Log Extraction
This function sifts through block receipts to find and print logs related to the specified Ethereum address.
Main Function
Main Function
The main
function serves as the primary driver of the script.
It establishes a connection to the Polygon node, fetches transaction receipts for a specific block, and then invokes the log extraction function.
Script Execution
Script Execution
This conditional ensures that the main function is executed only when the script is run directly and not when imported as a module.
Run the code
Run the code
Now add your Chainstack node URL and run the script:
The script will print logs for any transaction going to the specified address.