⚙️ Guide for Aleo CodeSprint v4.0

❓What is Aleo CodeSprint?

Aleo CodeSprint v4.0 is a global online hackathon where builders create zk-based decentralized apps (dApps) using the Aleo blockchain.
It’s your chance to win rewards, build real zero-knowledge apps, and get noticed by the Web3 zk community.

🧠 You can:

• Build a real working app on Aleo using their Leo language
• Earn rewards for creativity and innovation
• Learn zk programming from the inside
• Get noticed by Aleo core team

📍 Guide for Aleo CodeSprint

1. Register on Devpost & Join CodeSprint 🎯

1. Go to: codesprint-v4-0.devpost.com
2. Click “Join Hackathon”
3. Log in with GitHub/email
4. Fill in your profile: Name, Bio, Wallet address (for rewards)

📅 Deadline to join: July 15, 2025
Hackathon runs from July 16 to August 6, 2025

You need to install Aleo’s CLI tools locally.
Follow steps here: developer.aleo.org

Install Leo (smart contract language):

curl -sfL https://leo-lang.org/install.sh | sh

Check it:

leo --version

You’ll also need:

• GitHub account
• Optional: Node.js + frontend framework (React/Next.js)

Aleo is made for privacy-first applications.

Some ideas to build:

• 🔐 Anonymous voting dApp
• 🧾 Private on-chain notepad
• 💸 ZK-tipping platform
• 🧠 zk-NFTs that hide data
• 🕹️ zk-based turn-based game

Use Leo to build the logic. You can skip frontend, but it helps.

Example: Hello World program in Leo:

program hello;

function hello:
    input r0 as u32;
    output r0 as u32;

Try it locally:

leo new hello_project
cd hello_project
leo run

Resources:

• Playground: https://playground.aleo.org
• Docs: https://developer.aleo.org
• Examples: https://github.com/AleoHQ/leo

Before August 6, 2025, you must:

• Create a GitHub repo
• Upload Leo code (smart contracts)
• (Optional) Add UI/frontend
• Make short video demo (2–3 min, Loom or YouTube)
• Fill Devpost submission form (name, description, how it works)

🧠 Tips for Winning

• Focus on ZK privacy use-case
• Keep UX clean & idea unique
• Explain logic clearly in your video
• Comment your code and make README.md
• Use Aleo’s Discord for feedback

🔮 What We Expect in Future from Aleo

• Aleo Mainnet Launch (Q3 2025)
• Developer Grants
• zk AppStore on-chain
• SDK integrations with wallets
• More hackathons & bounties

💡 Lifehacks for Leo & zk

• Use Aleo Playground for testing
• Ask AI for code generation with prompts
• Collaborate in Discord — team up for better ideas
• Use clean, simple UI to explain the ZK magic

Example Prompt for Leo + AI:

Write a Leo function that allows a user to submit an encrypted vote, store proof, and validate it without revealing their choice.

Aleo CodeSprint is perfect for builders who want to explore the future of private computation. Even if you’re new — don’t worry, the tools are friendly. Learn Leo, build small, and iterate.

Start small. Build smart. Make it private.
Let’s build zk world together 🛠️🔐

Follow for updates:

X/Twitter: @Arsenkol1

Aleo Network on X
Aleo Network in Discord