export declare abstract class BaseHttpError extends Error {
    readonly status: number;
    readonly userMessage: string;
    readonly log: boolean;
    cause?: unknown;
    constructor(status: number, userMessage: string, options?: {
        log?: boolean;
        cause?: unknown;
    });
}
export declare class BadRequestHttpError extends BaseHttpError {
    constructor(userMessage: string, options?: {
        log?: boolean;
        cause?: unknown;
    });
}
export declare class UnauthorizedHttpError extends BaseHttpError {
    constructor();
}
export declare class ForbiddenHttpError extends BaseHttpError {
    constructor(options?: {
        log?: boolean;
        cause?: unknown;
    });
}
export declare class NotFoundHttpError extends BaseHttpError {
    constructor(userMessage: string, options?: {
        log?: boolean;
        cause?: unknown;
    });
}
export declare class ServiceUnavailableHttpError extends BaseHttpError {
    constructor(userMessage: string, options?: {
        log?: boolean;
        cause?: unknown;
    });
}
export declare function toHttpError(err: unknown): BaseHttpError | null;
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