API — Methods

Constructor

new UldaSign(cfg?: UldaSignConfig)

Creates an instance, merges your cfg with defaults, and registers any external hashers declared in the config.
Malformed descriptors throw synchronously (e.g., unknown output format).

New(idx = 0n)

Returns a self-contained Origin package for generation idx.

  • Work: O(N) random bytes, no hashing.
  • Output format (bytes/hex/base64) follows fmt.export.

stepUp(originPkg)

Returns the next Origin package derived from originPkg:

  • Drops the oldest block, appends a new random block, increments generation.
  • Keeps size stable and does not mutate the old package.

sign(originPkg)

Produces a Signature package for the given Origin:

  • Internals: import → ladder engine (S or X) → export.
  • Complexity: ~ N(N−1)/2 hash ops for both S and X (different structure).

verify(sigA, sigB)

Checks if sigB directly follows sigA.

  • S-mode: accepts gaps 1…N−1 (extra diagonal hashing).
  • X-mode: accepts only gap = 1.
  • Returns strict boolean; never throws on mismatch.

UldaSign.loadScriptOnce(url)

Loads a <script src="…"> exactly once (race-safe).
Useful for lazy-loading custom hash functions before calling sign().