export declare const CURRENT_PROTOCOL_VERSION = 1;
export declare const MAX_REQUEST_SIZE_BYTES = 4096;
export type BrokerErrorCode = 'BROKER_UNAVAILABLE' | 'ACCESS_DENIED' | 'SECRET_NOT_FOUND' | 'INVALID_REQUEST' | 'INVALID_PROTOCOL' | 'REQUEST_TOO_LARGE' | 'CREDENTIAL_STORE_ERROR';
export interface BrokerRequest {
    version: number;
    operation: 'get' | 'set' | 'delete';
    secret: string;
    value?: string;
}
export interface BrokerResponse {
    version: number;
    success: boolean;
    value?: string;
    error?: BrokerErrorCode;
    message?: string;
}
export declare class BrokerError extends Error {
    readonly code: BrokerErrorCode;
    constructor(code: BrokerErrorCode, message: string);
}
export declare function validateBrokerRequest(raw: unknown): BrokerRequest;