import { Knex } from 'knex';
import { DBType } from '../StorageReader';
import { Chain } from '../../sdk/types';
interface Migration {
    up: (knex: Knex) => Promise<void>;
    down?: (knex: Knex) => Promise<void>;
    config?: object;
}
interface MigrationSource<TMigrationSpec> {
    getMigrations: (loadExtensions: readonly string[]) => Promise<TMigrationSpec[]>;
    getMigrationName: (migration: TMigrationSpec) => string;
    getMigration: (migration: TMigrationSpec) => Promise<Migration>;
}
export declare class KnexMigrations implements MigrationSource<string> {
    chain: Chain;
    storageName: string;
    storageIdentityKey: string;
    maxOutputScriptLength: number;
    migrations: Record<string, Migration>;
    /**
     * @param chain
     * @param storageName human readable name for this storage instance
     * @param maxOutputScriptLength limit for scripts kept in outputs table, longer scripts will be pulled from rawTx
     */
    constructor(chain: Chain, storageName: string, storageIdentityKey: string, maxOutputScriptLength: number);
    getMigrations(): Promise<string[]>;
    getMigrationName(migration: string): string;
    getMigration(migration: string): Promise<Migration>;
    getLatestMigration(): Promise<string>;
    static latestMigration(): Promise<string>;
    setupMigrations(chain: string, storageName: string, storageIdentityKey: string, maxOutputScriptLength: number): Record<string, Migration>;
}
/**
 * @param knex
 * @returns {DBType} connected database engine variant
 */
export declare function determineDBType(knex: Knex<any, any[]>): Promise<DBType>;
export {};
//# sourceMappingURL=KnexMigrations.d.ts.map