import type { NoydbStore } from './types.js';
/**
 * Built-in in-memory store — the kernel's zero-config default.
 *
 * Nested `Map`s: `vault → collection → id → envelope`. Non-persistent
 * (data is lost on process exit). A conformant 6-method {@link NoydbStore}
 * with CAS atomicity and a monotonic store clock — the kernel version of
 * `@noy-db/to-memory`'s core, so `createNoydb()` works with no store package.
 *
 * Portable: imports only `types` + `errors` (no crypto primitive) — passes
 * the `stores-ciphertext-only` architecture guard.
 *
 * Implements the 6-method core only (no optional `listVaults`/`ping`/`tx`),
 * so `Noydb.listAccessibleVaults()` throws its documented capability error
 * rather than enumerating vaults under the default store.
 */
export declare function memoryStore(): NoydbStore;