progpow_header_cache_provider_impl.hpp

// Copyright (c) 2019-2022 Xenios SEZC
// https://www.veriblock.org
// Distributed under the MIT software license, see the accompanying
// file LICENSE or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef VERIBLOCK_POP_CPP_STORAGE_ADAPTORS_PROGPOW_HEADER_CACHE_PROVIDER_IMPL_HPP
#define VERIBLOCK_POP_CPP_STORAGE_ADAPTORS_PROGPOW_HEADER_CACHE_PROVIDER_IMPL_HPP
 
#include <veriblock/pop/storage/progpow_header_cache_provider.hpp>
#include <veriblock/pop/validation_state.hpp>
 
#include "storage_interface.hpp"
 
namespace altintegration {
 
namespace adaptors {
 
const char DB_PROGPOW_HEADER_PREFIX = '!';
 
inline std::vector<uint8_t> key_bytes(const uint256& key) {
  auto res = key.asVector();
  res.insert(res.begin(), DB_PROGPOW_HEADER_PREFIX);
  return res;
}
 
struct ProgpowHeaderCacheImpl : public ProgpowHeaderCache {
  ~ProgpowHeaderCacheImpl() override = default;
 
  ProgpowHeaderCacheImpl(Storage& storage) : storage_(storage) {}
 
  bool get(const uint256& key, uint192& value) const override {
    std::vector<uint8_t> bytes_out;
    if (!storage_.read(key_bytes(key), bytes_out)) {
      return false;
    }
    value = bytes_out;
 
    return true;
  }
 
  void insert(const uint256& key, uint192 value) override {
    storage_.write(key_bytes(key), value.asVector());
  }
 
 private:
  Storage& storage_;
};
}  // namespace adaptors
 
}  // namespace altintegration
 
#endif