/**
 * Digest-only write engine (C6 rotate branch + notLastN ring, spec §2/§4).
 * Called ONLY by RecordCodec.encryptRecord — both live inside the enclave.
 * @module
 */
import { type EnclaveKey } from '../crypto.js';
import type { VdigFieldPolicy } from '../../types.js';
export declare function mintVdigSlot(rawValue: string, policy: VdigFieldPolicy, prevBlob: string | undefined, cek: EnclaveKey, collection: string, recordId: string, field: string): Promise<string>;