/**
 * JSON Canonicalization for deterministic hashing
 *
 * Implements RFC 8785-like canonicalization:
 * - Alphabetically sorted keys (recursive)
 * - UTF-8 NFC normalization
 * - No whitespace (compact)
 * - Deterministic across platforms
 *
 * @see docs/rfc/proof-bundle-v1.md#4-canonicalization
 */
/**
 * Canonicalize a JavaScript object into deterministic JSON string
 *
 * @param obj - Object to canonicalize
 * @returns Canonical JSON string (compact, sorted keys, UTF-8 NFC)
 *
 * @example
 * ```ts
 * const obj = { b: 2, a: 1 };
 * const canonical = canonicalize(obj);
 * // Returns: '{"a":1,"b":2}\n'
 * ```
 */
export declare function canonicalize(obj: any): string;
/**
 * Canonicalize and append newline (standard format)
 *
 * @param obj - Object to canonicalize
 * @returns Canonical JSON string with trailing newline
 */
export declare function canonicalizeWithNewline(obj: any): string;
/**
 * Remove signature field and canonicalize
 * Used for signature verification
 *
 * @param bundle - Proof bundle (may contain signature field)
 * @returns Canonical JSON without signature field
 */
export declare function canonicalizeForSigning(bundle: any): string;
/**
 * Verify canonicalization is deterministic
 *
 * @param obj - Object to test
 * @returns true if canonicalization is stable
 */
export declare function isCanonicalStable(obj: any): boolean;