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// Copyright (c) 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_TXORPHANAGE_H
#define BITCOIN_TXORPHANAGE_H
#include <net.h>
#include <primitives/transaction.h>
#include <sync.h>
/** Expiration time for orphan transactions in seconds */
static constexpr int64_t ORPHAN_TX_EXPIRE_TIME = 20 * 60;
/** Guards orphan transactions and extra txs for compact blocks */
extern RecursiveMutex g_cs_orphans;
struct COrphanTx {
// When modifying, adapt the copy of this definition in tests/DoS_tests.
CTransactionRef tx;
NodeId fromPeer;
int64_t nTimeExpire;
size_t list_pos;
};
int EraseOrphanTx(const uint256& txid) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans);
void EraseOrphansFor(NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans);
unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans);
void AddChildrenToWorkSet(const CTransaction& tx, std::set<uint256>& orphan_work_set) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans);
bool HaveOrphanTx(const GenTxid& gtxid) EXCLUSIVE_LOCKS_REQUIRED(!g_cs_orphans);
std::pair<CTransactionRef, NodeId> GetOrphanTx(const uint256& txid) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans);
/** Map from txid to orphan transaction record. Limited by
* -maxorphantx/DEFAULT_MAX_ORPHAN_TRANSACTIONS */
extern std::map<uint256, COrphanTx> mapOrphanTransactions GUARDED_BY(g_cs_orphans);
/** Index from wtxid into the mapOrphanTransactions to lookup orphan
* transactions using their witness ids. */
extern std::map<uint256, std::map<uint256, COrphanTx>::iterator> g_orphans_by_wtxid GUARDED_BY(g_cs_orphans);
struct IteratorComparator
{
template<typename I>
bool operator()(const I& a, const I& b) const
{
return &(*a) < &(*b);
}
};
/** Index from the parents' COutPoint into the mapOrphanTransactions. Used
* to remove orphan transactions from the mapOrphanTransactions */
extern std::map<COutPoint, std::set<std::map<uint256, COrphanTx>::iterator, IteratorComparator>> mapOrphanTransactionsByPrev GUARDED_BY(g_cs_orphans);
/** Orphan transactions in vector for quick random eviction */
extern std::vector<std::map<uint256, COrphanTx>::iterator> g_orphan_list GUARDED_BY(g_cs_orphans);
#endif // BITCOIN_TXORPHANAGE_H
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