Why DeFi reimagines finance in Blockchain / Solidity - See It in Action

Why DeFi Reimagines Finance

📖 Scenario: Imagine you want to understand how Decentralized Finance (DeFi) changes the way money works. DeFi uses blockchain technology to create financial services without banks. In this project, you will build a simple program that shows how DeFi can track users' digital wallets and their balances.

🎯 Goal: You will create a small program that stores wallet addresses and their balances, set a minimum balance to qualify for a reward, find wallets that meet this condition, and then display those wallets. This helps you see how DeFi can manage money transparently and automatically.

📋 What You'll Learn

Create a dictionary with wallet addresses and their balances

Add a minimum balance threshold variable

Use a dictionary comprehension to find wallets with balances above the threshold

Print the qualifying wallets and their balances

💡 Why This Matters

🌍 Real World

DeFi platforms track users' digital wallets and balances to offer loans, rewards, or interest automatically without banks.

💼 Career

Understanding how to manage and filter data like wallet balances is useful for blockchain developers and financial software engineers working with DeFi applications.

1

Create wallet balances dictionary

Create a dictionary called wallets with these exact entries: '0xA1B2C3': 1500, '0xD4E5F6': 800, '0x123ABC': 2300, '0x789DEF': 400

Blockchain / Solidity

# Create the wallets dictionary with given addresses and balances
# Your code here

Need a hint?

Use curly braces {} to create a dictionary with wallet addresses as keys and balances as values.

2

Set minimum balance threshold

Create a variable called min_balance and set it to 1000 to represent the minimum balance required for a reward

Blockchain / Solidity

wallets = {'0xA1B2C3': 1500, '0xD4E5F6': 800, '0x123ABC': 2300, '0x789DEF': 400}
# Set the minimum balance threshold
# Your code here

Need a hint?

Just create a variable and assign the number 1000 to it.

3

Find wallets above minimum balance

Use a dictionary comprehension to create a new dictionary called qualified_wallets that includes only wallets from wallets with balances greater than or equal to min_balance

Blockchain / Solidity

wallets = {'0xA1B2C3': 1500, '0xD4E5F6': 800, '0x123ABC': 2300, '0x789DEF': 400}
min_balance = 1000
# Create qualified_wallets using dictionary comprehension
# Your code here

Need a hint?

Use {key: value for key, value in wallets.items() if condition} format to filter wallets.

4

Display qualified wallets

Write a print statement to display the qualified_wallets dictionary

Blockchain / Solidity

wallets = {'0xA1B2C3': 1500, '0xD4E5F6': 800, '0x123ABC': 2300, '0x789DEF': 400}
min_balance = 1000
qualified_wallets = {address: balance for address, balance in wallets.items() if balance >= min_balance}
# Print the qualified_wallets dictionary
# Your code here

Need a hint?

Use print(qualified_wallets) to show the result.