/**
 * Extracts the minimum `time` (ms epoch) across all dex entries in a raw
 * clearingHouse API response.
 *
 * The MCP response is keyed by venue (e.g. `{ main: { …, time }, xyz: { …, time } }`).
 * Each dex entry carries its own `time` from the Hyperliquid clearinghouseState
 * API, indicating how fresh the data is.
 *
 * We take the **minimum** as a defensive measure: if any dex returned stale
 * data the entire response is conservatively marked with the oldest timestamp,
 * so downstream staleness checks can discard the whole response.
 *
 * Returns `0` when no valid time is found (e.g. response shape is unexpected
 * or the upstream stops providing timestamps).
 */
export declare function extractMinClearingHouseTime(raw: Record<string, unknown>): number;
/**
 * Stateful guard that detects stale clearingHouse API responses by comparing
 * the response timestamp against the most recent known-fresh timestamp for
 * the same key (wallet address).
 *
 * The Hyperliquid clearinghouseState API occasionally returns a response
 * whose timestamp is **older** than a previously observed one. Processing
 * such stale data causes downstream consumers to misinterpret disappeared
 * positions as closes and reappearing positions as new opens.
 *
 * Usage:
 * ```ts
 * const guard = createClearingHouseStalenessGuard();
 * if (guard.isStale(address, responseTime)) { return null; }
 * ```
 *
 * When either `responseTime` or the stored last time is `0` (unavailable),
 * the check is skipped so callers degrade gracefully if the upstream stops
 * providing timestamps.
 */
export declare function createClearingHouseStalenessGuard(): {
    /**
     * Returns `true` if `responseTime` is stale (older than the last
     * accepted time for `key`). Also updates internal tracking when the
     * response is fresh.
     */
    isStale(key: string, responseTime: number): boolean;
    /** Returns the last accepted time for a key, or `0` if never seen. */
    getLastTime(key: string): number;
};
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