import type { ModelPricing } from './projection.ts';
/** Route key for a table row. `provider/model` is the primary shape. */
export type PriceKey = `${string}/${string}`;
/** DeepSeek domestic peak hours (UTC 1-4 & 6-10 = Beijing 9-12 & 14-18). */
export declare function isPeakHour(utcHour: number): boolean;
/** Resolve one pricing row to the rate active at `now` (peak/off-peak when applicable).
 *
 * Weekday-aware (BEIJING day & hour): if the current BEIJING weekday is in
 * `pricing.peakDays`, the peak/off-peak windows (BEIJING minutes) apply; a day
 * NOT in `peakDays` (e.g. Sat/Sun) is billed flat with `weekend ?? offPeak`.
 */
export declare function resolvePricingForTime(pricing: ModelPricing, now: number): ModelPricing;
/**
 * A sparse price table keyed by `provider/model`. Lookup tries the exact key,
 * then a `*` wildcard for the provider, then returns undefined.
 */
export declare class PriceTable {
    private rows;
    constructor(rows?: Record<PriceKey, ModelPricing>);
    get(provider: string, model: string): ModelPricing | undefined;
    /** Exact-key lookup only (no wildcard) — used for user overrides/reset. */
    getRaw(key: string): ModelPricing | undefined;
    /** Remove one exact row (reset of a user-overridden row with no bundled base). */
    removeRaw(key: string): void;
    /** Merge a full set of rows (remote refresh / user override), keeping others. */
    merge(rows: Record<PriceKey, ModelPricing>): void;
    /** Read-only iteration over all `provider/model` keys (for alias/canonical matching). */
    entries(): Array<{
        key: string;
        provider: string;
        model: string;
        value: ModelPricing;
    }>;
    get size(): number;
}
/** The process-wide table the projection `view` reads; the service mutates it. */
export declare const currentPrices: {
    table: PriceTable;
    currency: string;
    updatedAt: number;
    usdToCny: number;
};
/** Fetch the live USD→CNY exchange rate (free, keyless source). */
export declare function fetchUsdToCny(signal?: AbortSignal): Promise<number>;
/**
 * Fetch and normalize a LiteLLM-shaped pricing document. `litellm_provider`
 * is used as the provider route when present (mapped through
 * {@link PROVIDER_ALIASES}), else `provider` is synthesized from the model
 * id's first segment.
 *
 * @param url - endpoint serving `model_prices_and_context_window.json`.
 * @param signal - caller cancellation.
 * @returns a full provider/model price map (empty on failure to avoid clobbering).
 */
export declare function fetchRemotePrices(url: string, signal?: AbortSignal): Promise<Record<PriceKey, ModelPricing>>;