export interface BaseErrorData {
    id?: string;
    code?: string;
    message?: string;
    cause?: unknown;
    [key: string]: unknown;
}
/**
 * Class representing an error.
 */
export default class BaseError extends Error {
    readonly name: string;
    /**
     * A unique identifier for this error.
     */
    readonly id: string;
    /**
     * Whether the error is operational.
     */
    readonly isOperational: boolean;
    protected static readonly defaultCode: string;
    /**
     * A machine-readable error code which identifies the specific type of error.
     */
    readonly code: string;
    /**
     * Additional error information.
     */
    readonly data: {
        [key: string]: unknown;
    };
    constructor(message?: string | BaseErrorData);
    constructor(message: string, data?: BaseErrorData);
    /**
     * Reserved keys that should not appear in `BaseError.prototype.data`.
     */
    protected static reservedKeys: string[];
    protected static readonly defaultId: string;
    protected static readonly defaultMessage: string;
    /**
     * Check whether an error object is marked as operational.
     */
    static isErrorMarkedAsOperational(error: Error): boolean;
    /**
     * Normalize a machine-readable error code.
     */
    private static normalizeErrorCode;
}
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