Solidity compiler optimization in Blockchain / Solidity - Mini Project: Build & Apply

Solidity Compiler Optimization

📖 Scenario: You are building a simple smart contract on the Ethereum blockchain. You want to learn how to optimize your Solidity code using compiler settings to save gas costs when deploying and interacting with your contract.

🎯 Goal: Learn how to set up a basic Solidity contract and enable compiler optimization to reduce gas usage.

📋 What You'll Learn

Create a simple Solidity contract with a state variable and a function to update it.

Add a compiler optimization setting variable.

Use the optimization setting in the contract's pragma directive.

Deploy and verify the contract outputs the expected value.

💡 Why This Matters

🌍 Real World

Smart contracts on blockchains like Ethereum must be optimized to save gas fees, which are real money costs for users.

💼 Career

Blockchain developers need to understand compiler optimization to write efficient, cost-effective smart contracts.

1

Create a simple Solidity contract

Write a Solidity contract named SimpleStorage with a public uint variable called storedData initialized to 100. Add a function set(uint x) that updates storedData to x.

Blockchain / Solidity

// Your code here

Need a hint?

Start with pragma solidity ^0.8.0; and define the contract with the variable and function as described.

2

Add compiler optimization setting variable

Create a boolean variable called optimizationEnabled and set it to true to represent enabling compiler optimization.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract SimpleStorage {
    uint public storedData = 100;

    bool optimizationEnabled = true;

    function set(uint x) public {
        storedData = x;
    }
}

// Your code here

Need a hint?

Just add bool optimizationEnabled = true; inside the contract.

3

Use optimization setting in pragma directive

Modify the pragma solidity directive to include the compiler optimization setting by adding optimizer: { enabled: true, runs: 200 } as a comment above the contract.

Blockchain / Solidity

// Add compiler optimization settings comment here
pragma solidity ^0.8.0;

contract SimpleStorage {
    uint public storedData = 100;

    bool optimizationEnabled = true;

    function set(uint x) public {
        storedData = x;
    }
}

Need a hint?

Add a comment above pragma solidity showing the optimization settings as optimizer: { enabled: true, runs: 200 }.

4

Print the storedData value

Write a Solidity function called getStoredData that returns the current value of storedData. Then, simulate calling getStoredData after setting storedData to 250 and print the result as Stored data is: 250.

Blockchain / Solidity

// Add getStoredData function and print simulation below
// Your code here

Need a hint?

Create a getStoredData function that returns storedData. Then imagine calling set(250) and printing the returned value.