import { KeyVerifier, KeyFingerprint, KeyMetadata } from "./interface.js";
/**
 * In-memory implementation of KeyVerifier that stores and verifies key fingerprints.
 * Provides functionality to compute and verify cryptographic checksums of keys, storing them
 * in memory for subsequent verification. This implementation is primarily used for testing
 * and development purposes where persistence is not required.
 *
 * Key features:
 * - Computes SHA-256 checksums and sizes for key bytes.
 * - Stores key fingerprints in memory using string locators.
 * - Verifies key bytes against stored or provided fingerprints.
 *
 * @implements {KeyVerifier}
 */
export declare class MemKeyVerifier implements KeyVerifier {
    private keyStore;
    /**
     * Computes and optionally stores key metadata. If a keyFingerprint is provided, this function will verify the computed checksum against it before storing it.
     *
     * @param {KeyMetadata} keyMetadata - Object containing key bytes and optional verification data.
     * @throws {KeyVerificationError} When provided keyFingerprint doesn't match computed values.
     * @returns {Promise<KeyFingerprint>} Computed key metadata.
     */
    computeKeyMetadata(keyMetadata: KeyMetadata): Promise<KeyFingerprint>;
    /**
     * Verifies key bytes against stored or provided metadata. Follows a priority verification scheme:
     * 1. If KeyFingerprint is provided in the metadata, this method verifies against that first.
     * 2. If a locator is provided, attempts to verify against stored fingerprint.
     * 3. If neither is available, throws an error.
     *
     * @param {KeyMetadata} keyMetadata - Object containing the key bytes and optional verification metadata.
     * @throws {Error} When neither fingerprint nor valid locator is provided for verification.
     * @throws {KeyVerificationError} When size or checksum verification fails.
     * @returns {Promise<void>} Promise that resolves when verification succeeds.
     */
    verifyKeyBytes(keyMetadata: KeyMetadata): Promise<void>;
}