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// Copyright 2015 MaidSafe.net limited. // // This SAFE Network Software is licensed to you under (1) the MaidSafe.net Commercial License, // version 1.0 or later, or (2) The General Public License (GPL), version 3, depending on which // licence you accepted on initial access to the Software (the "Licences"). // // By contributing code to the SAFE Network Software, or to this project generally, you agree to be // bound by the terms of the MaidSafe Contributor Agreement, version 1.1. This, along with the // Licenses can be found in the root directory of this project at LICENSE, COPYING and CONTRIBUTOR. // // Unless required by applicable law or agreed to in writing, the Safe Network Software distributed // under the GPL Licence is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY // KIND, either express or implied. // // Please review the Licences for the specific language governing permissions and limitations // relating to use of the SAFE Network Software. use futures::Future; use std::error::Error; /// Trait inherited from `std::error::Error` representing errors which can be returned by the /// `Storage` object. pub trait StorageError: Error {} /// Trait which must be implemented by storage objects to be used in self-encryption. Data is /// passed to the storage object encrypted with `name` being the SHA3-256 hash of `data`. `Storage` /// could be implemented as an in-memory `HashMap` or a disk-based container for example. pub trait Storage { /// Error type returned by `get` or `put`. type Error: StorageError; /// Retrieve data previously `put` under `name`. If the data does not exist, an error should be /// returned. fn get(&self, name: &[u8]) -> Box<Future<Item = Vec<u8>, Error = Self::Error>>; /// Store `data` under `name`. fn put(&mut self, name: Vec<u8>, data: Vec<u8>) -> Box<Future<Item = (), Error = Self::Error>>; }