Anvay
Gasless claim-link remittance protocol on Monad
- Send dollars home with a link: the sender locks AUSD in an EIP-712 escrow contract, shares the link on WhatsApp, and the recipient collects it with zero gas and no wallet setup.
- Designed the security model so link keys never leave the browser (URL fragment only), each signature binds to a single transfer ID to block replay, and the relayer cannot redirect funds anywhere except the address named in the signature.
- Integrated a Chainlink CRE oracle workflow for live USD→INR rates, Envio HyperIndex for on-chain event indexing, and WebAuthn PRF passkey accounts with HKDF-derived per-link keys.
- Shipped 35 Foundry tests covering front-running, replay, signature malleability, expiry and fuzz cases, tested against Agora's real AUSD on a mainnet fork.