Gasless USDC payments

Send USDC on Base with zero ETH for gas. Your wallet signs an off-chain authorization (EIP-3009) and GROX relays the transaction, covering the gas itself — so you never need to hold a gas token. On a USDC send, tap ⚡ GASLESS. A verifiable receipt is issued on success. (Goes fully live once the platform’s payment relayer is funded.)