/**
 * 0x Gasless API V2 — Franklin built-in tool for Base swaps WITHOUT user gas.
 *
 * UX win over Base0xSwap (Permit2): the user signs only EIP-712 typed-data
 * (no on-chain approval, no on-chain swap submission). 0x's relayer
 * broadcasts the trade and pays gas; the user pays nothing in ETH and only
 * needs to hold the input token (USDC, DAI, or other Permit-supporting
 * ERC-20).
 *
 * For tokens that don't support Permit (USDT etc.) we error out and tell
 * the user to either use Base0xSwap (which can do a one-time approve+swap
 * with ETH gas) or swap from a Permit-supporting token instead.
 *
 * Routes through BlockRun gateway (/v1/zerox/gasless/{price,quote,submit,status})
 * — server holds the 0x API key, no user setup needed. On-chain affiliate
 * (20 bps) is force-set at quote time on the gateway side.
 *
 * Reference: https://github.com/0xProject/0x-examples/tree/main/gasless-v2-headless-example
 */
import type { CapabilityHandler } from '../agent/types.js';
export declare const base0xGaslessSwapCapability: CapabilityHandler;