import type { Surface } from '@funkit/connect-core';
import type { SurfaceAdapter } from './adapter';
import type { StripeOnrampClient } from './stripeOnramp';
interface StripeCheckoutParams {
    action: 'PERFORM_CHECKOUT';
    sessionId: string;
    callbackEndpoint: string;
    callbackIdField: string;
}
/** Fetches one `client_secret` for a single Stripe checkout attempt. */
export type CheckoutClientSecretRequest = (params: {
    callbackEndpoint: string;
    callbackIdField: string;
}) => Promise<string>;
export declare function matchStripeCheckoutParams(surface: Surface): StripeCheckoutParams | undefined;
/**
 * Stripe's checkout loop, which is the only thing that finalises a purchase.
 *
 * The charge is not settled by our backend's checkout endpoint returning a
 * client secret — Stripe treats the transaction as final only once
 * `performCheckout` resolves, because it owns the next actions (3DS) between
 * attempts. So the callback endpoint is never called outside this callback,
 * and the surface stays mounted for the whole loop rather than reporting on
 * the first secret it receives.
 */
export declare function stripeCheckoutAdapter(stripe: StripeOnrampClient, requestClientSecret: CheckoutClientSecretRequest): SurfaceAdapter;
export {};
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