disconnected_transactions.h

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// Copyright (c) 2023-present 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_KERNEL_DISCONNECTED_TRANSACTIONS_H
#define BITCOIN_KERNEL_DISCONNECTED_TRANSACTIONS_H

#include <primitives/transaction.h>
#include <util/hasher.h>

#include <cstddef>
#include <cstdint>
#include <list>
#include <unordered_map>
#include <vector>

static const unsigned int MAX_DISCONNECTED_TX_POOL_BYTES{20'000'000};
class DisconnectedBlockTransactions {
private:
    uint64_t cachedInnerUsage = 0;
    const size_t m_max_mem_usage;
    std::list<CTransactionRef> queuedTx;
    using TxList = decltype(queuedTx);
    std::unordered_map<Txid, TxList::iterator, SaltedTxidHasher> iters_by_txid;

    std::vector<CTransactionRef> LimitMemoryUsage();

public:
    DisconnectedBlockTransactions(size_t max_mem_usage)
        : m_max_mem_usage{max_mem_usage} {}

    ~DisconnectedBlockTransactions();

    size_t DynamicMemoryUsage() const;

    [[nodiscard]] std::vector<CTransactionRef> AddTransactionsFromBlock(const std::vector<CTransactionRef>& vtx);

    void removeForBlock(const std::vector<CTransactionRef>& vtx);

    size_t size() const { return queuedTx.size(); }

    void clear();

    std::list<CTransactionRef> take();
};
#endif // BITCOIN_KERNEL_DISCONNECTED_TRANSACTIONS_H