export interface AuthenticatedUser {
    isAuthenticated: boolean;
    id?: string;
    email?: string;
    [key: string]: any;
}
export type TokenValidator = (headers: Record<string, string>) => Promise<AuthenticatedUser>;
export interface ConversationAuthContext {
    headers: Record<string, string | string[] | undefined>;
}
export interface ConversationAuthHandlerOptions {
    tokenValidator: TokenValidator;
    requestIdGenerator?: () => string;
    timestampProvider?: () => Date;
}
export declare class ConversationAuthError extends Error {
    constructor(message: string);
}
export declare class ConversationAuthHandler {
    private readonly options;
    private readonly requestIdGenerator;
    private readonly timestampProvider;
    constructor(options: ConversationAuthHandlerOptions);
    prepareAuthHeaders(context?: ConversationAuthContext): Promise<Record<string, string>>;
    private normalizeHeaders;
}