codec.hpp

Go to the documentation of this file.

#ifndef KAGOME_TRIE_CODEC_HPP
#define KAGOME_TRIE_CODEC_HPP

#include "common/blob.hpp"
#include "common/buffer.hpp"
#include "storage/trie/node.hpp"

namespace kagome::storage::trie {
  class Codec {
   public:
    using StoreChildren = std::function<outcome::result<void>(
        common::BufferView, common::Buffer &&)>;

    virtual ~Codec() = default;

    virtual outcome::result<common::Buffer> encodeNodeAndStoreChildren(
        const Node &node, const StoreChildren &store_children) const = 0;

    outcome::result<common::Buffer> encodeNode(const Node &node) const {
      return encodeNodeAndStoreChildren(
          node, [](common::BufferView, common::Buffer &&) {
            return outcome::success();
          });
    }

    virtual outcome::result<std::shared_ptr<Node>> decodeNode(
        gsl::span<const uint8_t> encoded_data) const = 0;

    virtual common::Buffer merkleValue(const common::BufferView &buf) const = 0;

    virtual bool isMerkleHash(const common::BufferView &buf) const = 0;

    virtual common::Hash256 hash256(const common::BufferView &buf) const = 0;
  };

}  // namespace kagome::storage::trie

#endif  // KAGOME_TRIE_CODEC_HPP