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/*
This file is part of GNUnet.
Copyright (C) 2023 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @author Tobias Frisch
* @file src/messenger/messenger_api_peer_store.h
* @brief messenger api: client implementation of GNUnet MESSENGER service
*/
#ifndef GNUNET_MESSENGER_API_PEER_STORE_H
#define GNUNET_MESSENGER_API_PEER_STORE_H
#include "platform.h"
#include "gnunet_util_lib.h"
struct GNUNET_MESSENGER_Message;
struct GNUNET_MESSENGER_PeerStore
{
struct GNUNET_CONTAINER_MultiShortmap *peers;
};
/**
* Initializes a peer store as fully empty.
*
* @param[out] store Peer store
*/
void
init_peer_store (struct GNUNET_MESSENGER_PeerStore *store);
/**
* Clears a peer store, wipes its content and deallocates its memory.
*
* @param[in,out] store Peer store
*/
void
clear_peer_store (struct GNUNET_MESSENGER_PeerStore *store);
/**
* Returns the peer identity inside the <i>store</i> which verifies the
* signature of a given <i>message</i> as valid. The specific peer identity
* has to be added to the <i>store</i> previously. Otherwise the function
* returns NULL.
*
* @param[in,out] store Peer store
* @param[in] message Message
* @param[in] hash Hash of message
* @return Peer identity or NULL
*/
struct GNUNET_PeerIdentity*
get_store_peer_of (struct GNUNET_MESSENGER_PeerStore *store,
const struct GNUNET_MESSENGER_Message *message,
const struct GNUNET_HashCode *hash);
/**
* Adds a <i>peer</i> identity to the <i>store</i> if necessary. It ensures
* that the given <i>peer</i> can be verified as sender of a message
* afterwards by the <i>store</i>.
*
* @param[in,out] store Peer store
* @param[in] peer Peer identity
*/
void
update_store_peer (struct GNUNET_MESSENGER_PeerStore *store,
const struct GNUNET_PeerIdentity* peer);
/**
* Removes a <i>peer</i> identity from the <i>store</i> entirely.
*
* @param[in,out] store Peer store
* @param[in] peer Peer identity
*/
void
remove_store_peer (struct GNUNET_MESSENGER_PeerStore *store,
const struct GNUNET_PeerIdentity *peer);
#endif //GNUNET_MESSENGER_API_PEER_STORE_H
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