The **node‑scrypt** package is a native Node.js wrapper around Colin Percival’s scrypt key‑derivation function, exposing synchronous, callback‑based and Promise‑based APIs for generating scrypt parameters, hashing passwords (kdf), verifying hashes, and performing raw scrypt hashes. It’s aimed at developers who need a high‑security, memory‑hard password‑hashing solution in Node.js (though the module is now deprecated in favor of the built‑in `crypto.scrypt`).