export declare function canonicalize(obj: unknown, _ancestors?: WeakSet<object>): string;
/** Legacy canonicalization for a NEW WRITE, with the APS unsafe-integer rule applied.
 *
 *  Byte-identical to canonicalize() for every value it accepts: same key sort, same
 *  null and undefined stripping, same Date handling, same cycle rule. The only
 *  difference is that an integer-valued number outside the interoperable IEEE 754 range
 *  is refused rather than emitted. See core/write-policy.ts for the rule.
 *
 *  Use at signing and new-write boundaries ONLY. Verification, recompute and any path
 *  rebuilding the preimage of an existing artifact must keep calling canonicalize(),
 *  which stays unrestricted so historical bytes keep verifying.
 *
 *  READS EACH PROPERTY EXACTLY ONCE. canonicalize() above reads obj[key] twice, once in
 *  its filter and once in its map, so a standalone validator in front of it would make a
 *  third read and a getter or Proxy could answer safe, safe, then unsafe. Here the value
 *  is captured once into `val`, checked, and emitted from that same capture, so the
 *  value checked is the value signed. Do not refactor this back into filter plus map. */
export declare function canonicalizeForWrite(obj: unknown, path?: string, _ancestors?: WeakSet<object>): string;
export declare function canonicalJson(obj: Record<string, unknown>): string;
export declare function canonicalHash(obj: Record<string, unknown>): string;
/** Write-boundary twin of canonicalHash().
 *
 *  Reaches a canonicalizer indirectly through canonicalJson(), so a census over direct
 *  canonicalizer calls cannot see it. Same digest as canonicalHash() for every value it
 *  accepts; the only difference is that an integer-valued number outside the
 *  interoperable IEEE 754 range is refused instead of hashed. Use at signing and
 *  new-write boundaries ONLY: canonicalHash() stays unrestricted because verifiers
 *  recompute commitments with it over artifacts committed before this rule. */
export declare function canonicalHashForWrite(obj: Record<string, unknown>): string;
export declare function normalizeTimestamp(ts: string): string;
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