import { Payments } from '../index.js';
import { PaymentsClient } from './paymentsClient.js';
import type { ClientRegistryOptions } from './types.js';
/**
 * Registry for managing multiple PaymentsClient instances by agentId+planId+baseUrl.
 * If a client does not exist for a given combination, it is created and cached.
 */
export declare class ClientRegistry {
    private clients;
    private payments;
    /**
     * Constructs a ClientRegistry.
     * @param payments - The Payments instance to use for all clients.
     */
    constructor(payments: Payments);
    /**
     * Gets (or creates) a PaymentsClient for the given agentBaseUrl, agentId, and planId.
     * The combination of these three is used as a unique key.
     * It derives the Agent Card path when needed.
     * @param options - ClientRegistryOptions with agentBaseUrl, agentId, planId (all required).
     * @returns The PaymentsClient instance
     */
    getClient(options: ClientRegistryOptions): Promise<PaymentsClient>;
}
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