import { type Version } from './migrator.js';
/**
 * Base class for all errors thrown by the migrator.
 */
export declare abstract class MigratorError extends Error {
    constructor(name: string, message: string);
}
/**
 * Wraps an error thrown within the migration function, while migrating an object between successive
 * versions.
 */
export declare class MigrationError extends MigratorError {
    /**
     * Version from which migration was attempted (version of the object being migrated).
     */
    readonly from: Version;
    /**
     * Version to which migration was attempted.
     */
    readonly to: Version;
    /**
     * The underlying (wrapped) error.
     */
    readonly cause: unknown;
    constructor(
    /**
     * Version from which migration was attempted (version of the object being migrated).
     */
    from: Version, 
    /**
     * Version to which migration was attempted.
     */
    to: Version, 
    /**
     * The underlying (wrapped) error.
     */
    cause: unknown);
}
/**
 * Indicates that the sequence of steps to migrate an object between two versions couldn't be
 * determined.
 *
 * Occurs when migrations between the versions (or a chain of migrations between successive versions
 * starting & ending at the them) haven't been registered beforehand.
 */
export declare class NoMigrationStepsError extends MigratorError {
    /**
     * Version from which migration was attempted.
     */
    readonly from: Version;
    /**
     * Version to which migration was attempted.
     */
    readonly to: Version;
    constructor(
    /**
     * Version from which migration was attempted.
     */
    from: Version, 
    /**
     * Version to which migration was attempted.
     */
    to: Version);
}
export declare function describeVersion(v: Version): string;