/**
 * Cross-platform CSPRNG.
 *
 * Deliberately backed by `nacl.randomBytes` rather than Node's `crypto.randomBytes`:
 * tweetnacl resolves to `crypto.getRandomValues` in browsers and to Node's CSPRNG
 * under Node, so this module carries no `node:crypto` import. That matters because
 * every deposit path reaches this code via `createUTXO`/`generateKeypair`, and a
 * bare `import { randomBytes } from "crypto"` throws at bundle time in browser
 * builds that have no Node polyfill.
 *
 * tweetnacl is already a hard dependency, so this adds no install weight.
 */
/** `length` cryptographically-secure random bytes. */
export declare function randomBytes(length: number): Uint8Array;
/** 32 cryptographically-secure random bytes — the common case for blindings and seeds. */
export declare function randomBytes32(): Uint8Array;