/**
 * Parse a human TTL like `"90m"`, `"2h"`, `"45s"`, `"1d"` into whole seconds (milliseconds round
 * up to at least 1s — the wire TTL is second-granular). Throws a typed `SealantError` on anything
 * else so a typo'd TTL fails at the call site instead of silently never expiring.
 */
export declare const parseTtlSeconds: (ttl: string) => number;