import type { ProviderUsageKind, ProviderUsageResponse, ProviderUsageRow } from '../../shared/provider-usage.js';
export interface ProviderUsageAdapter {
    label: string;
    provider: ProviderUsageKind;
    source: ProviderUsageRow['source'];
    fetch: () => Promise<Array<Omit<ProviderUsageRow, 'checkedAt' | 'label' | 'provider' | 'source'>>>;
    /** Optional single-row path for GET /provider-usage/:provider. */
    fetchActive?: () => Promise<Omit<ProviderUsageRow, 'checkedAt' | 'label' | 'provider' | 'source'>>;
}
export interface ProviderUsageReadOptions {
    force?: boolean;
}
export interface ProviderUsageServiceOptions {
    cacheTtlMs?: number;
    failureTtlMs?: number;
    log?: (message: string) => void;
    now?: () => number;
    staleMaxAgeMs?: number;
}
export declare class ProviderUsageService {
    private readonly adapters;
    private readonly cache;
    private readonly cacheTtlMs;
    private readonly failureTtlMs;
    private readonly inFlight;
    private readonly log;
    private readonly now;
    private readonly staleMaxAgeMs;
    constructor(adapters?: ProviderUsageAdapter[], options?: ProviderUsageServiceOptions);
    list(options?: ProviderUsageReadOptions): Promise<ProviderUsageResponse>;
    get(provider: ProviderUsageKind, options?: ProviderUsageReadOptions): Promise<ProviderUsageRow>;
    private fetchProvider;
    private fetchProviderFresh;
}
export declare function defaultProviderUsageAdapters(): ProviderUsageAdapter[];
export declare const defaultProviderUsageService: ProviderUsageService;
//# sourceMappingURL=provider-usage.service.d.ts.map