/// <reference types="node" />
import { Vault, VaultBackupType, VaultItem, VaultServiceConfig } from './types';
/**
 * SpaceVaultService implements {@link Vault} interface. It interacts to space's vault service
 * to retrieve and store vault items.
 *
 */
export declare class SpaceVaultService implements Vault {
    private readonly config;
    constructor(config: VaultServiceConfig);
    retrieve(uuid: string, passphrase: string, backupType: VaultBackupType): Promise<VaultItem[]>;
    /**
     * Store VaultItems to space fault.
     *
     * NOTE: metadata should contain a `sessionToken` field and it should be a valid hub session api token.
     *
     */
    store(uuid: string, passphrase: string, backupType: VaultBackupType, items: VaultItem[], metadata: Record<string, string>): Promise<void>;
    private computeVaultKey;
    private computeVaultServiceKey;
}
export declare const decryptVaultItemData: (ciphertext: Buffer, key: Buffer) => string;
export declare const encryptVaultItemData: (data: string, key: Buffer) => Buffer;