/**
 * Lighter's live L2→L1 bridge delay, in seconds, or `undefined` until it loads.
 * - Shared by web and native so the two never quote the same bridge differently,
 *   and so both read one cache entry.
 * - An unusable value reads as `undefined`, not `0`: callers fall back to the
 *   historical estimate rather than promising instant finality.
 */
export declare function useLighterWithdrawalDelaySeconds({ enabled, }?: {
    /** Off for a host that configured no Lighter — it must not reach Lighter's API. */
    enabled?: boolean;
}): number | undefined;
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