Cross Flow

🚀 Inspiration

Millions of Africans face slow, expensive, and unreliable cross-border payments. Traditional remittance services come with high fees and delays, while many remain unbanked or underbanked. With the rise of crypto and stablecoins, we saw an opportunity to create a faster, cheaper, and more inclusive financial system using USDC on Stellar to bridge traditional finance and blockchain—empowering users with seamless, real-time transactions.

💡 What It Does

CrossFlow enables instant, low-cost cross-border payments by allowing users to:
✅ Deposit local currencies (Naira, Shillings, etc.) via mobile money, USSD, or bank transfers
✅ Convert fiat into USDC on Stellar for fast, affordable transactions
✅ Send and receive USDC seamlessly across Africa
✅ Swap between Stellar and Ethereum at the best rates, reducing gas fees
✅ Withdraw back into local currency via trusted on/off-ramps like Flutterwave
✅ Access funds without smartphones or internet using USSD-based wallets

🛠 How We Built It

We built CrossFlow using:
🔹 USDC on Stellar for fast, low-fee transactions
🔹 Ethereum-Stellar bridges (Allbridge, Wormhole, LI.FI) for cross-chain swaps
🔹 Flutterwave APIs for seamless fiat on/off-ramps
🔹 USSD & mobile money integration to reach unbanked users
🔹 Secure, user-friendly wallet system for storing and managing USDC

⚡ Challenges We Ran Into

🚧 Cross-chain complexities – Ensuring smooth Ethereum-Stellar swaps while optimizing fees
🚧 Regulatory compliance – Navigating KYC/AML requirements to ensure legitimacy
🚧 User accessibility – Designing a simple, intuitive USSD-based interface for feature phones
🚧 Liquidity & transaction costs – Balancing affordable swaps and stable fiat conversions

🏆 Accomplishments That We're Proud Of

✔ Bridging traditional finance with crypto for real-world impact
✔ Enabling financial access for unbanked users using mobile money & USSD
✔ Optimizing cross-chain swaps to lower fees and ensure the best rates
✔ Creating a scalable model for cross-border payments across Africa

📚 What We Learned

🔹 The demand for fast, low-cost remittances is massive in Africa
🔹 Trust and education are key to crypto adoption in emerging markets
🔹 Regulatory partnerships are crucial for sustainable crypto-fiat integrations
🔹 Simple, accessible solutions (like USSD wallets) are essential for inclusion

🚀 What’s Next for CrossFlow?

🔜 Expand to more countries across Africa for greater impact
🔜 Enhance liquidity and swap efficiency for better cross-chain performance
🔜 Partner with more payment providers to improve fiat accessibility
🔜 Launch educational campaigns to build trust in stablecoins and DeFi
🔜 Explore AI-powered fraud detection to ensure secure transactions

Built With

• chainlink
• express.js
• infura
• mongodb
• next
• node.js
• react
• stellar