feat: add Algorand repository for TradeVault

[thisisouvik]

TradeVault 🛡️

TradeVault is a decentralized, cross-border escrow platform built natively on the Algorand Blockchain. It replaces expensive, slow, and outdated bank Letters of Credit with instant, trustless smart contracts.

💡 What it actually does (Point-wise)

• 1. Replaces Traditional Banks: Instead of paying massive fees for bank guarantees when trading internationally, buyers and sellers use an immutable Algorand Smart Contract.
• 2. Locks Funds Securely: A buyer instantly deposits and locks USDC (stablecoin) into the escrow smart contract. The seller can cryptographically verify the money is secured and ready before shipping.
• 3. Risk-Free Shipping: The seller ships the physical goods and inputs the carrier tracking number into the application.
• 4. Automated Delivery Verification: TradeVault integrates with external logistics APIs (like TrackingMore). When the tracking shows the package as "Delivered", the buyer is notified.
• 5. Instant Trustless Payouts: Once the buyer confirms receipt (or a timeout passes), the smart contract atomically releases the USDC directly to the seller's wallet in under 4 seconds.
• 6. Dispute Resolution: If the shipment is lost, damaged, or incorrect, either party can raise a dispute, pausing the smart contract. An independent arbitrator reviews the uploaded evidence and pushes an on-chain split verdict.

🛠️ Tech Stack

• Frontend: Next.js 15 (App Router), React, Tailwind CSS, Framer Motion
• Web3 Integration: Algorand SDK, PeraWallet Connect, @txnlab/use-wallet
• Smart Contracts: Python (AlgoKit & PuyaPy) compiled to TEAL (ARC4 standards)
• Backend & Auth: Supabase (PostgreSQL, Auth, Storage)

🚀 Why Algorand?

TradeVault relies on Algorand because of its instant finality (trades settle in <4 seconds securely), micro-cent transaction fees (around ~$0.002 per escrow contract call), and native USDC support (meaning no risky bridges are required).