Here is an article on creating a Python script that listens to Bitcoin network transactions and monitors addresses stored in a MySQL database:

Ethereum: Starting Point for Listening to Bitcoin Network Transactions in Python

Bitcoin, the second-largest cryptocurrency by market capitalization, uses a decentralized network of nodes to validate and record transactions. In this article, we will explore how to create a Python script that listens to the Bitcoin network and monitors addresses stored in a MySQL database.

Prerequisites

• You have a basic understanding of Python and MySQL.

• You have a Bitcoin node (e.g., Bitcoin Core) installed on your machine.

• You have a MySQL database created and populated with Bitcoin transaction data.

Step 1: Install Required Libraries

Before we begin, you will need to install the following libraries:

• mysql-connector-python for interacting with MySQL databases

• py bitcoin-core for working with Bitcoin transactions ( Note: this is not a full Bitcoin node implementation)

You can install these libraries using pip:

pip install mysql-connector-python pybitcoincore

Step 2: Create a Python Script

Create a new Python file, e.g., bitcoin_listener.py, and add the following code:

“`python

import mysql.connector

import json

MySQL database connection settings

DB_HOST = ‘localhost’

DB_USER = ‘your_username’

DB_PASSWORD = ‘your_password’

DB_NAME = ‘bitcoin_transactions’

Bitcoin node connection settings

BITCOIN_NODE_URL = ‘

BITCOIN_NODE_SECRET = ‘your_secret_key’

This should not be shared publicly

def connect_to_mysql():

“””Establish a MySQL database connection”””

return mysql.connector.connect(

host=DB_HOST,

user=DB_USER,

password=DB_PASSWORD,

database=DB_NAME

)

def get_bitcoin_transactions():

“””Retrieve Bitcoin transactions from the node”””

Send a P2P request to the Bitcoin node

response = requests.get(BITCOIN_NODE_URL)

data = json.loads(response.text)

Extract transaction addresses and amounts

transactions = []

for item in data[‘transactions’]:

address = item[‘from’]

amount = item[‘value’]

transactions.append({

‘address’: address,

‘amount’: amount

})

return transactions

def main():

“””Listen to Bitcoin network transactions”””

Establish a MySQL database connection

db_connection = connect_to_mysql()

Retrieve Bitcoin transactions from the node

transactions = get_bitcoin_transactions()

Iterate over transactions and monitor addresses in the MySQL database

for transaction in transactions:

address = transaction[‘address’]

amount = transaction[‘amount’]

Check if the address exists in the MySQL database

cursor = db_connection.cursor()

query = “SELECT * FROM bitcoin_transactions WHERE address=%s AND timestamp>=%s”

cursor.execute(query, (address, datetime.now()))

result = cursor.fetchone()

If the address is found, update its amount and timestamp in the database

if result:

new_amount = transaction[‘amount’] + 10

Simulate a transaction with an increase of 10 units

query = “UPDATE bitcoin_transactions SET amount=%s, timestamp=NOW() WHERE address=%s”

cursor.execute(query, (new_amount, address))

Print the results to the console

print(f”Address: {address} | Amount: {amount} | Timestamp: {datetime.now()}”)

Close the MySQL database connection

db_connection.