import { Knex } from 'knex';
import Mapping from '../domain/Mapping';
import SynchronizeContext from '../domain/SynchronizeContext';
import KeyValuePair from '../domain/KeyValuePair';
/**
 * Reads and returns the package.json contents.
 *
 * @returns {*}
 */
export declare function getPackageMetadata(): any;
/**
 * Prepares config vars for injecting into the target database.
 *
 * @param {Mapping<string>} vars
 * @returns {Mapping<string>}
 */
export declare function prepareInjectionConfigVars(vars: Mapping<string>): Mapping<string>;
/**
 * Convert an object (map of key => value) into an array of key / value pairs.
 *
 * @param {Mapping<string>} vars
 * @returns {KeyValuePair[]}
 */
export declare function convertToKeyValuePairs(vars: Mapping<string>): KeyValuePair[];
/**
 * Setup the table in the database with the injected config.
 *
 * @param {Knex.Transaction} trx
 * @param {SynchronizeContext} context
 * @returns {Promise<void>}
 */
export declare function setup(trx: Knex.Transaction, context: SynchronizeContext): Promise<void>;
/**
 * Drop the injected config table.
 *
 * @param {Knex.Transaction} trx
 * @param {SynchronizeContext} context
 * @returns {Promise<void>}
 */
export declare function cleanup(trx: Knex.Transaction, context: SynchronizeContext): Promise<void>;