lfs_interface.h

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the Apache 2.0 License.
#pragma once
 
#include "ccf/node_subsystem_interface.h"
 
#include <memory>
#include <string>
#include <vector>
 
namespace ccf::indexing
{
  using LFSKey = std::string;
  using LFSEncryptedContents = std::vector<uint8_t>;
  using LFSContents = std::vector<uint8_t>;
 
  struct FetchResult
  {
    enum FetchResultType
    {
      Fetching,
      Loaded,
      NotFound,
      Corrupt,
    };
    std::atomic<FetchResultType> fetch_result;
 
    LFSKey key;
 
    LFSContents contents;
  };
 
  using FetchResultPtr = std::shared_ptr<FetchResult>;
 
  class AbstractLFSAccess : public ccf::AbstractNodeSubSystem
  {
  public:
    virtual ~AbstractLFSAccess() = default;
 
    static char const* get_subsystem_name()
    {
      return "LFSAccess";
    }
 
    virtual void store(const LFSKey& key, LFSContents&& contents) = 0;
    virtual FetchResultPtr fetch(const LFSKey& key) = 0;
  };
}