The problem Lumenvault solves

LumenVault: Problem Solving, Applications, and Benefits
LumenVault is a web-based decentralized lending platform on the Celo blockchain, enabling borrowers to create borrow orders funded by lenders using cUSD, with CELO as collateral. It offers secure, low-cost, and accessible DeFi solutions, especially for underserved users.

Problems LumenVault Solves
1. Limited Credit Access: Enables unbanked users to create borrow orders via a web app, no KYC or bank account needed.
2. High Fees: Removes intermediaries, using Celo’s low-cost transactions for cheaper loans.
3. Opaque Processes: Ensures transparency with on-chain borrow orders and funding.
4. Slow Funding: Automates loan creation and funding for near-instant cUSD disbursal.
5. Collateral Risks: Secures CELO collateral in smart contracts, with auditable terms.
Applications
1. Personal Loans: Borrowers create orders for cUSD loans, funded by lenders for personal needs.
2. Microfinancing: Entrepreneurs post orders for business funds, using CELO collateral.
3. Passive Income: Lenders fund orders to earn cUSD interest.
4. Cross-Border Loans: Supports global funding of borrow orders for remittances or trade.
5. Community Lending: Enables group borrow orders for shared financial goals.
How LumenVault Improves Tasks
1. Easier: Borrowers create orders and lenders fund them via a simple web app, using phone-based Celo wallets.
2. Safer: Smart contracts secure collateral and funds, with on-chain transparency reducing fraud.
3. Cheaper: Low Celo fees and no middlemen cut costs.
4. Faster: Instant order posting, funding, and disbursal via smart contracts.
5. Flexible: Borrowers set terms; lenders choose orders to fund.
6. Secure: Celo’s blockchain and audited contracts protect against hacks.

Challenges I ran into

Challenges in Building LumenVault
While developing LumenVault, a web-based decentralized lending platform on the Celo blockchain, I faced significant hurdles. Below are two key challenges and how I resolved them.

Challenge 1: Gas Estimation Failures in Borrow Order Creation
Hurdle: Transactions for creating borrow orders failed with "gas estimation failed" errors on the Celo testnet, blocking borrowers from posting orders.

Impact: This halted the core borrowing functionality and raised concerns about gas costs and blockchain compatibility.

Solution: I manually set a higher gas limit for transactions, optimized the smart contract to reduce gas usage, and added user-friendly error messages. After redeploying and testing, borrow orders worked reliably.

Challenge 2: Signer Mismatch During Order Funding
Hurdle: Lenders faced "signer address mismatch" errors when funding borrow orders, as the wallet address didn’t align with the transaction signer.

Impact: This prevented lenders from funding orders, breaking the lending flow and exposing potential security issues.

Solution: I updated the signer configuration to sync with the active MetaMask wallet, added error handling, and tested thoroughly to ensure lenders could fund orders securely.

Conclusion
These challenges taught me to optimize for Celo’s gas model and ensure robust wallet integration, improving LumenVault’s reliability and user experience.