How Vendra works

On most marketplaces you trust a company to hold your money and resolve disputes, and you pay 5–15% commission for it. On Vendra, an Arc smart contract holds the money instead. When a buyer pays, their USDC is locked in escrow — not sent to the seller, not held by Vendra. It is released only when the buyer confirms delivery, auto-releases after a safety window, or is settled by a neutral arbiter if there is a dispute. Vendra never takes a cut of the trade.

Every order moves through a clear on-chain lifecycle:

1. Funded — the buyer's USDC is locked in the escrow contract.
2. Shipped — the seller marks the item shipped.
3. Released — the buyer confirms receipt and funds go to the seller. If the buyer takes no action, funds auto-release after a 7-day confirmation window (a safety net, not a hold on confirmed orders).
4. Refunded — if a dispute is resolved in the buyer's favor.

Two protections sit alongside the happy path: reclaim (if the seller never ships, the buyer can reclaim after the 5-day ship deadline) and dispute (either party can freeze the funds for an arbiter to settle).

1. Log in — connect any EVM wallet, or sign in with your email to get a Circle USDC wallet.
2. Fund your wallet with testnet USDC from the faucet.
3. Check out — your USDC is locked in escrow on Arc.
4. When your item arrives, open your order and confirm receipt to release payment.
5. If something is wrong, raise a dispute instead of confirming.

1. Create a seller profile and launch a store (a banner and complete details are required to publish).
2. Add products with images and USDC prices.
3. When an order comes in, mark it shipped.
4. You are paid automatically when the buyer confirms receipt, or after the auto-release window.

If a buyer and seller cannot agree, either party raises a dispute, which freezes the order's funds on-chain. Both sides post their account and upload evidence (photos, receipts, tracking) to a shared case file. A neutral arbiter reviews it and settles on-chain — full refund, full release, or a custom split. Only the designated arbiter address can move frozen funds; the contract enforces this. At launch the arbiter is a single Vendra-operated wallet; decentralized and AI-assisted arbitration are on the roadmap.

Vendra supports two ways to participate, at full parity:

• EVM wallets (MetaMask, Coinbase, WalletConnect) — you sign transactions yourself.
• Email / Circle wallets — sign in with an email and a Circle developer-controlled USDC wallet is provisioned for you, with signing handled securely server-side. No seed phrase or extension needed.

Both fund and operate the same on-chain escrow, and every step behaves identically regardless of how you logged in.

VendraEscrow is a purpose-built Solidity contract (^0.8.24) using OpenZeppelin v5 (SafeERC20, ReentrancyGuard, Ownable). One escrow record per order, an explicit state machine, and checks-effects-interactions with reentrancy protection on every transition.

• Configurable confirmation window (7 days) and ship deadline (5 days).
• A single arbiter address authorized to resolve disputes.
• Integrates USDC through Arc's ERC-20 interface (6-decimal units), while the same balance pays for gas natively.

Address: 0x9BFa767F3454dF7EB5E9515FEa7542d774D3B36f

• On-chain (trustless): custody of funds, the escrow state machine, and dispute outcomes — the source of truth for anything involving money.
• Off-chain (for UX and cost): the store and product catalog, profiles, an order index, and dispute case files / evidence.
• Stack: Next.js, wagmi + viem + RainbowKit (EVM), Circle developer-controlled wallets (email users), Supabase (data + storage), Vercel. Contract built and deployed with Hardhat.

• Browse the marketplace
• Source on GitHub
• Escrow contract on the Arc explorer
• Arc Testnet USDC faucet