import { Request, Response, NextFunction } from 'express';
import { Address } from 'viem';
import { Address as Address$1 } from '@solana/kit';
export { Address as SolanaAddress } from '@solana/kit';
import { RoutesConfig, FacilitatorConfig, PaywallConfig } from 'x402/types';
export { Money, Network, PaymentMiddlewareConfig, Resource, RouteConfig, RoutesConfig } from 'x402/types';

/**
 * Creates a payment middleware factory for Express
 *
 * @param payTo - The address to receive payments
 * @param routes - Configuration for protected routes and their payment requirements
 * @param facilitator - Optional configuration for the payment facilitator service
 * @param paywall - Optional configuration for the default paywall
 * @returns An Express middleware handler
 *
 * @example
 * ```typescript
 * // Simple configuration - All endpoints are protected by $0.01 of USDC on base-sepolia
 * app.use(paymentMiddleware(
 *   '0x123...', // payTo address
 *   {
 *     price: '$0.01', // USDC amount in dollars
 *     network: 'base-sepolia'
 *   },
 *   // Optional facilitator configuration. Defaults to x402.org/facilitator for testnet usage
 * ));
 *
 * // Advanced configuration - Endpoint-specific payment requirements & custom facilitator
 * app.use(paymentMiddleware('0x123...', // payTo: The address to receive payments*    {
 *   {
 *     '/weather/*': {
 *       price: '$0.001', // USDC amount in dollars
 *       network: 'base',
 *       config: {
 *         description: 'Access to weather data'
 *       }
 *     }
 *   },
 *   {
 *     url: 'https://facilitator.example.com',
 *     createAuthHeaders: async () => ({
 *       verify: { "Authorization": "Bearer token" },
 *       settle: { "Authorization": "Bearer token" }
 *     })
 *   },
 *   {
 *     cdpClientKey: 'your-cdp-client-key',
 *     appLogo: '/images/logo.svg',
 *     appName: 'My App',
 *   }
 * ));
 * ```
 */
declare function paymentMiddleware(payTo: Address | Address$1, routes: RoutesConfig, facilitator?: FacilitatorConfig, paywall?: PaywallConfig): (req: Request, res: Response, next: NextFunction) => Promise<void>;

export { paymentMiddleware };