import type { ProviderSecret } from './CredentialVault';
export declare const PLAINTEXT_CREDENTIAL_STORAGE_MODE = "plaintext-v1";
export declare const SECRET_CELL_CREDENTIAL_STORAGE_MODE = "secret-cell-v1";
export type PlaintextCredentialStorageMode = typeof PLAINTEXT_CREDENTIAL_STORAGE_MODE;
export interface PlaintextCredentialRow {
    storageMode?: unknown;
    secretPayload?: unknown;
    encryptedSecret?: unknown;
    wrappedDataKey?: unknown;
    encryptionAlgorithm?: unknown;
}
export declare class UnsupportedCredentialStorageModeError extends Error {
    readonly storageMode: string;
    constructor(storageMode: string);
}
export declare function encodePlaintextCredential(secret: ProviderSecret): string;
export declare function decodePlaintextCredential(row: PlaintextCredentialRow): ProviderSecret;