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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_ADDRDB_H
#define BITCOIN_ADDRDB_H
#include <net_types.h> // For banmap_t
#include <univalue.h>
#include <util/fs.h>
#include <optional>
#include <vector>
class ArgsManager;
class AddrMan;
class CAddress;
class CDataStream;
class NetGroupManager;
struct bilingual_str;
bool DumpPeerAddresses(const ArgsManager& args, const AddrMan& addr);
/** Only used by tests. */
void ReadFromStream(AddrMan& addr, CDataStream& ssPeers);
/** Access to the banlist database (banlist.json) */
class CBanDB
{
private:
/**
* JSON key under which the data is stored in the json database.
*/
static constexpr const char* JSON_KEY = "banned_nets";
const fs::path m_banlist_dat;
const fs::path m_banlist_json;
public:
explicit CBanDB(fs::path ban_list_path);
bool Write(const banmap_t& banSet);
/**
* Read the banlist from disk.
* @param[out] banSet The loaded list. Set if `true` is returned, otherwise it is left
* in an undefined state.
* @return true on success
*/
bool Read(banmap_t& banSet);
};
/** Returns an error string on failure */
std::optional<bilingual_str> LoadAddrman(const NetGroupManager& netgroupman, const ArgsManager& args, std::unique_ptr<AddrMan>& addrman);
/**
* Dump the anchor IP address database (anchors.dat)
*
* Anchors are last known outgoing block-relay-only peers that are
* tried to re-connect to on startup.
*/
void DumpAnchors(const fs::path& anchors_db_path, const std::vector<CAddress>& anchors);
/**
* Read the anchor IP address database (anchors.dat)
*
* Deleting anchors.dat is intentional as it avoids renewed peering to anchors after
* an unclean shutdown and thus potential exploitation of the anchor peer policy.
*/
std::vector<CAddress> ReadAnchors(const fs::path& anchors_db_path);
#endif // BITCOIN_ADDRDB_H
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