/**
 * Deterministic JSON serialization: object keys sorted recursively, no
 * whitespace. Two structurally equal values always produce identical bytes,
 * which is what makes ledger hashes reproducible across processes and
 * platforms. `undefined` members are dropped (like JSON.stringify); cycles
 * and non-finite numbers are hard errors because silently coercing them
 * would make a hash cover different data than the reader sees.
 */
export declare function canonicalStringify(value: unknown): string;