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Querying full and archive EVM nodes with Python

This project allows the retrieval of historical data from the blockchain programmatically, switching between a full and archive node provider when necessary.

See the full tutorial on the Chainstack blog:

• Querying full and archive Ethereum nodes with Python

Project details

This repository holds the Python version of a tool to query common state functions. Some essential functions include getting an address balance and storage at a given position, a contract bytecode, or even the whole transactions included on a given block.

This tool queries the blockchain using the web3 and inquirer libraries for Python.

Quick start

Clone this repository

git clone https://github.com/yieniggu/full-vs-archive-querys-py.git

Install dependencies

pip install web3 inquirer

Add a full and archive node RPC URL to utils.py

Open utils.py in the src directory and add your nodes RPC URLs:

# Init full and archive provider
full_node_provider = Web3(
    Web3.HTTPProvider(
        "CHAINSTACK_FULL_NODE_URL"
    )
)
archive_node_provider = Web3(
    Web3.HTTPProvider(
        "CHAINSTACK_ARCHIVE_NODE_URL"
    )
)

Run the program

python main.py

Prerequisites

• Python ^3.9.16
• A full and archive node RPC endpoints.

Deploy a full and archive node with Chainstack:

1. Sign up with Chainstack.
2. Deploy a node.
3. View node access and credentials.

Dependencies

• web3.py ^5.31.3
• inquirer ^3.1.2

Install

To install this project:

Clone this repository:

git clone https://github.com/yieniggu/full-vs-archive-querys-py.git

Install the dependencies in the project's directory:

cd query-full-and-archive-nodes-python

pip install web3 inquirer