Cryptocurrency adoption is still hindered by complexity. Most people struggle with creating wallets, managing seed phrases, and understanding blockchain addresses. Swiish removes these barriers by allowing users to send crypto using just a passport number—making crypto as easy as sending a bank transfer.

With Swiish, users can:

• Instantly send crypto to anyone with a passport, even if they’re not yet registered.
• Log in seamlessly using Self.xyz and a passport QR scan.
• Eliminate the need for prior crypto knowledge—no wallets, no keys, just simple transactions.
• Receive funds automatically when logging in for the first time.

This makes crypto more accessible to everyday users, bringing it closer to being used as real-world money.

1.Login:

• Users scan a QR code on the Swiish login page using Self.xyz.
• Authentication is done via a passport-based identity.

2.Sending Crypto:

• Users can send crypto to an address or a passport number.
• If sending to a passport number, the app checks for an existing wallet.
• If the recipient isn’t registered, a wallet is created for them automatically.

3.Receiving Crypto:

• Users who log in for the first time will see any pending transactions associated with their passport.
• The system ensures that even unregistered users can receive funds, making crypto transactions effortless.

4.For Crypto-Savvy Users:

• Users familiar with blockchain can still send funds to a traditional wallet address instead of a passport.

By removing the need for manual wallet management, Swiish makes crypto transactions feel as seamless as sending money via a bank app.

• Backend: Built with Django, handling authentication, transaction processing, and database interactions.
• Wallet Management:
  • The system generates and manages wallets on behalf of users.
  • Wallets are linked to passport numbers for seamless transfers.
• Transaction Handling:
  • Uses Ethereum’s Sepolia testnet for crypto transactions.
  • Checks for existing wallets or creates them when necessary.
• Frontend: Built with Next.js, providing a simple and intuitive user interface.
• Infrastructure: Runs on Docker with Nginx as a reverse proxy and PostgreSQL for database management.

• Self.xyz → Provides passport-based authentication.
• Ethereum Sepolia Testnet → Facilitates ETH transactions for testing.

Unlike existing crypto platforms that require users to manually create wallets and manage keys, Swiish enables:
✅ Instant onboarding – Just log in with a passport, no app installation required.
✅ Effortless transactions – Send crypto with a passport number, even if the recipient isn’t registered yet.
✅ No need for wallet knowledge – Users don’t need to understand addresses or seed phrases.

Due to hackathon time constraints, we made two significant trade-offs:

1. Wallet Security

• Currently, wallet private keys are stored unencrypted in the database.
• The ideal solution is encrypting them using a combination of a user passkey and a platform secret.
• Future updates will include this enhancement for improved security.

2. Authentication Security

• The login flow involves posting a request to: https://swiish.money/create-login
• The request currently lacks API key protection, making it susceptible to unauthorized requests.
• While this was easy to fix, we focused on other tasks for the demo.
• Future versions will add API key protection and rate-limiting for security.

3. Handle to send crypto

• The passport number can be used to send crypto which could cause some privacy concerns.
• Ideally when the user login for the first time it should be prompt to choose an username which other people could use to send crypto. Did not develop this feature due to time constraints.