/*
 * Copyright 2020 Coöperatieve Rabobank U.A.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { VcTransaction } from '..'

/**
 * Interface for a repository which manages
 * the data for Transaction objects.
 *
 * @see VerifiableCredentialTransactionRepository (implementation)
 */
export interface VCTransactionRepository {
  /**
   * Finds all stored Transactions
   *
   * @return {Promise<VcTransaction[]>} will be empty when no results were found
   */
  findAll (): Promise<VcTransaction[]>

  /**
   * Finds one Transaction using the uuid
   *
   * @throws Error when nothing is found or when the stored Transaction format is not valid
   * @param {string} uuid
   * @return {Promise<VcTransaction>}
   */
  findOneByUuid (uuid: string): Promise<VcTransaction>

  /**
   * Saves one Transaction to the provided
   * storage medium. The storage key will be the uuid
   * from the Transaction, so that needs to be unique.
   * If the uuid already exists, the Transaction will be
   * overwritten.
   *
   * @param {VcTransaction} transaction
   * @return {Promise<void>}
   */
  saveOne (transaction: VcTransaction): Promise<void>

  /**
   * Remove all Transactions,
   * including the index.
   *
   * @return {Promise<void>}
   */
  clearAll (): Promise<void>
}