import type { LivePrice, PriceFeedInfo, PriceFeedStatus, PricePoint } from "./types.js";
/** Tail-wide price-feed health. */
export interface PriceFeedGlobalStatus {
    /** Any watched asset's subscription socket is currently delivering. */
    wsConnected: boolean;
    /** Number of assets with an active watch. */
    watchCount: number;
}
export declare class PriceStore {
    private readonly assets;
    status: PriceFeedGlobalStatus;
    private version;
    private readonly listeners;
    private readonly cache;
    getVersion(): number;
    subscribe: (listener: () => void) => (() => void);
    /** Bump version and notify subscribers. Call once per applied batch/status change. */
    commit(): void;
    /** Memoized derived snapshot — stable reference while version is unchanged. */
    select<T>(key: string, compute: () => T): T;
    private state;
    setStatus(asset: string, status: PriceFeedStatus): void;
    setLatest(asset: string, latest: LivePrice): void;
    setInfo(asset: string, info: PriceFeedInfo): void;
    mergeTicks(asset: string, points: PricePoint[]): void;
    setGlobalStatus(patch: Partial<PriceFeedGlobalStatus>): void;
    /** Drop one asset's cached rows (its watch was released). */
    purgeAsset(asset: string): void;
    getLatest(asset: string): LivePrice | null;
    getInfo(asset: string): PriceFeedInfo | null;
    getStatus(asset: string): PriceFeedStatus;
    /** Recent ticks for an asset, newest first (up to `limit`). */
    getTicks(asset: string, limit: number): PricePoint[];
    getGlobalStatus(): PriceFeedGlobalStatus;
}