Transaction confirmation handling in Blockchain / Solidity - Mini Project: Build & Apply

Transaction confirmation handling

📖 Scenario: You are building a simple blockchain wallet app. When you send a transaction, you want to check how many confirmations it has received on the blockchain to know if it is secure.

🎯 Goal: Create a program that stores a transaction with its current confirmation count, sets a confirmation threshold, checks if the transaction is confirmed enough, and then prints a message about the confirmation status.

📋 What You'll Learn

Create a dictionary called transaction with keys 'id' and 'confirmations' and exact values 'tx123' and 2

Create a variable called confirmation_threshold and set it to 3

Create a boolean variable called is_confirmed that is True if transaction['confirmations'] is greater than or equal to confirmation_threshold, otherwise False

Print Transaction tx123 confirmed if is_confirmed is True, otherwise print Transaction tx123 pending

💡 Why This Matters

🌍 Real World

Blockchain wallets and explorers show transaction confirmation status to users so they know when their transactions are secure.

💼 Career

Understanding how to handle transaction confirmations is important for blockchain developers building wallets, exchanges, or monitoring tools.

1

Create the transaction data

Create a dictionary called transaction with keys 'id' and 'confirmations' and values 'tx123' and 2 respectively.

Blockchain / Solidity

# Create the transaction dictionary with id 'tx123' and confirmations 2
# Your code here

Need a hint?

Use curly braces to create a dictionary with the exact keys and values.

2

Set the confirmation threshold

Create a variable called confirmation_threshold and set it to 3.

Blockchain / Solidity

transaction = {'id': 'tx123', 'confirmations': 2}
# Create confirmation_threshold variable and set it to 3
# Your code here

Need a hint?

Just assign the number 3 to the variable confirmation_threshold.

3

Check if transaction is confirmed

Create a boolean variable called is_confirmed that is True if transaction['confirmations'] is greater than or equal to confirmation_threshold, otherwise False.

Blockchain / Solidity

transaction = {'id': 'tx123', 'confirmations': 2}
confirmation_threshold = 3
# Create is_confirmed variable using a comparison
# Your code here

Need a hint?

Use the >= operator to compare confirmations with the threshold.

4

Print confirmation status

Print Transaction tx123 confirmed if is_confirmed is True, otherwise print Transaction tx123 pending.

Blockchain / Solidity

transaction = {'id': 'tx123', 'confirmations': 2}
confirmation_threshold = 3
is_confirmed = transaction['confirmations'] >= confirmation_threshold
# Print confirmation status message
# Your code here

Need a hint?

Use an if-else statement and f-strings to print the correct message.