VanGaurd

A Decentralized Invoice Funding Platform

🚀 Inspiration

The inspiration for VanGaurd came from a staggering reality: a $2.5 trillion global financing gap that leaves millions of SMEs struggling for survival.

While traditional banks take up to 90 days to process paper-based invoices, we had an “Aha!” moment at the intersection of Shardeum’s scalability and Arweave’s permanence.

We set out to build a bridge where a piece of unpaid paper becomes a liquid, NFT-backed asset, empowering the backbone of the economy with instant cash flow.

💡 What It Does

VanGaurd is a triple-portal decentralized ecosystem that digitizes debt:

🏢 For SMEs

Anchor invoices permanently on Arweave
Mint Verified Debt NFTs
Unlock immediate funding without banks

🏦 For MNCs

Secure, human-readable EIP-712 signing
Verify debt obligations directly on-chain

💰 For Investors

Marketplace for Real-World Asset (RWA) yields
Fund invoices and earn interest using: SI = P * N * R / 100 where:
P = Principal
N = Time-weighted duration
R = Interest rate

🔐 Financial Stability

Uses a 4-stage USDC flow
Eliminates SHM / ETH price volatility during the funding lifecycle

🛠️ How We Built It

VanGaurd was built entirely from scratch using a modern Web3 stack:

🔗 Smart Contracts

Written in Solidity
On-chain ecrecover validation
Matches MNC signatures against authorized public keys

🗂️ Storage

Arweave integration for immutable invoice anchoring
Legal proof of debt is permanent and tamper-proof

🎨 Frontend

Next.js + Tailwind CSS
Three role-based dashboards:
SME
MNC
Investor

🌐 Network

Deployed on Shardeum Atomium
Dynamic state sharding keeps gas fees under a cent, even at scale

⚠️ Challenges We Ran Into

✍️ Signature Integrity

Moved from raw hex signing to EIP-712
Allows MNCs to clearly see what they are signing
Critical for enterprise trust and compliance

📊 Time-Weighted Interest Model

Designing N (time factor) required extensive testing
Ensured:
Early investors are fairly rewarded
Contract solvency remains intact

🏆 Accomplishments We're Proud Of

On-Chain Verification
SMEs cannot mint Debt NFTs without verified MNC signatures
Lean Architecture
Replaced traditional bank overhead with immutable smart contracts
UX-First Design
Wallet-gated access hides Web3 complexity behind an adorable fintech UI

📚 What We Learned

Horizontal scaling on Shardeum enables high-frequency finance for everyone
EIP-712 is essential for real enterprise adoption
Arweave GraphQL makes long-term RWA storage practical
The future of RWAs lies in:
Making blockchain invisible
Keeping data indestructible

🔮 What’s Next for VanGaurd

🚀 Scaling from Testnet to Impact

Mainnet Launch
Targeting $250M SOM on Shardeum Mainnet
Advanced KYB / KYC
Automated business verification for MNC onboarding
Secondary Market
Trade Debt NFTs before invoice maturity for added liquidity
Legal Expansion
Formalizing jurisdictional property-seizure frameworks with regional legal partners