export type CanonicalJsonValue = null | boolean | number | string | CanonicalJsonValue[] | {
    [key: string]: CanonicalJsonValue;
};
/**
 * Cross-runtime hash profile used by every structured Nebula provenance hash.
 *
 * This value is included in the encoded root, so future profiles cannot share
 * a digest with this one even when their value encodings happen to match.
 */
export declare const CANONICAL_HASH_PROFILE: "nebula-canonical-hash-v1";
/**
 * Serialize a JSON value deterministically.
 *
 * Object keys are sorted recursively. Values that regular JSON.stringify
 * silently drops or coerces are rejected: provenance hashes must never depend
 * on an implicit lossy conversion.
 */
export declare function canonicalJson(value: unknown): string;
export declare function sha256Hex(value: string | Buffer | Uint8Array): string;
/**
 * Convert a JSON-like value to an injective, language-neutral typed tree.
 *
 * - Object keys use Unicode scalar/code-point order rather than JavaScript's
 *   UTF-16 code-unit order.
 * - Safe integral numbers share one integer representation.
 * - Every other finite Number, including -0 and unsafe integral Numbers, is
 *   represented by its exact big-endian IEEE-754 binary64 bits.
 * - Strings containing unpaired UTF-16 surrogates are rejected.
 *
 * The returned tree itself contains only JSON values, and contains no dynamic
 * object keys, so regular JSON serialization is deterministic cross-runtime.
 */
export declare function canonicalizeForHash(value: unknown): CanonicalJsonValue;
/** Serialize the typed cross-runtime representation used as SHA-256 input. */
export declare function hashCanonicalJson(value: unknown): string;
export declare function sha256Canonical(value: unknown): string;