/**
 * Pluggable subscription/tier lookup.
 */
import type { Tier, TierResult } from '../types.js';
export declare abstract class TierProvider {
    abstract getTier(whatsapp: string): Promise<TierResult>;
}
export interface HttpTierProviderOptions {
    baseUrl: string;
    token?: string;
    urlFor?: (whatsapp: string) => string;
    cacheMs?: number;
    defaultTier?: Tier;
}
export declare class HttpTierProvider extends TierProvider {
    readonly baseUrl: string;
    readonly token: string | undefined;
    readonly urlFor: (whatsapp: string) => string;
    readonly cacheMs: number;
    readonly defaultTier: Tier;
    readonly cache: Map<string, {
        t: number;
        v: TierResult;
    }>;
    constructor({ baseUrl, token, urlFor, cacheMs, defaultTier }: HttpTierProviderOptions);
    getTier(whatsapp: string): Promise<TierResult>;
    invalidate(whatsapp: string): void;
}
export declare class StaticTierProvider extends TierProvider {
    private readonly map;
    constructor(map?: Record<string, TierResult>);
    getTier(whatsapp: string): Promise<TierResult>;
}
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