onelink

Trust center

Verification before claims.

OneLink is a real Arc Testnet payment product. Its public language is deliberately limited to routes and outcomes that have completed live settlement tests.

What has been proven live

  • · Direct USDC payment on Arc Testnet through the deployed checkout.
  • · WalletConnect QR pairing and signed Arc Testnet payment through a compatible WalletConnect peer.
  • · Permanent freelancer profile payment with a persisted receipt.
  • · Base Sepolia to Arc Testnet bridge checkout through Circle App Kit and CCTP.
  • · Creator cancellation verified by Arc event before final state.

How payment state is protected

A standard invoice is registered in shared storage only after the server verifies its Arc PaymentLinkCreated event, payment terms, and URL-derived link identifier. A single on-chain invoice cannot be replayed into multiple dashboard rows.

The browser cannot mark a Supabase-backed payment as paid or cancelled. Server routes verify the corresponding Arc settlement or creator-cancellation event before writing either final state.

Receipts expose the Arcscan settlement transaction so a payer or recipient can independently inspect the on-chain result.

Why USDC is the gas token on Arc

  • · Arc Testnet uses USDC as native gas. A payer never needs ETH or any other token to settle a OneLink invoice.
  • · The same USDC the payer is sending also covers the transaction fee, so the wallet only needs one balance to complete the flow.
  • · Deterministic on-chain finality on Arc means the receipt page reflects settlement as soon as the wallet transaction confirms.
  • · Arcscan is the public source of truth. Every paid OneLink receipt links to the exact Arc transaction that moved the USDC.

Scope and limitations

  • · This deployment operates on testnets and uses testnet USDC only. It is not a mainnet payment service.
  • · Base Sepolia is the live-proven bridge source. Displayed beta sources are not represented as launch-proven routes.
  • · Circle Gateway unified-balance checkout is disabled until its funded flow is separately verified.
  • · OneLink does not support cards, fiat transfer, Solana, or automatic payment from arbitrary wallet funds.

User safety

  • · Confirm the recipient, amount, network, and route in the checkout before signing.
  • · Do not send mainnet funds or production credentials to this testnet deployment.
  • · Use the linked Arcscan receipt as the source of truth for a completed testnet settlement.