Class Workspace

src/validation.cpp:571–611

    // All the intermediate state that gets passed between the various levels
    // of checking a given transaction.
    struct Workspace {
        // explicit Workspace(const CTransactionRef& ptx) : m_ptx(ptx), m_hash(ptx->GetHash()) {} // ELEMENTS: unused since we need the genesis block hash
        explicit Workspace(const CTransactionRef& ptx, const uint256& hash_genesis_block) : m_ptx(ptx), m_hash(ptx->GetHash()), m_precomputed_txdata(hash_genesis_block) {} // ELEMENTS
        /** Txids of mempool transactions that this transaction directly conflicts with. */
        std::set<uint256> m_conflicts;
        std::set<std::pair<uint256, COutPoint> > m_set_pegins_spent;
        /** Iterators to mempool entries that this transaction directly conflicts with. */
        CTxMemPool::setEntries m_iters_conflicting;
        /** Iterators to all mempool entries that would be replaced by this transaction, including
         * those it directly conflicts with and their descendants. */
        CTxMemPool::setEntries m_all_conflicting;
        /** All mempool ancestors of this transaction. */
        CTxMemPool::setEntries m_ancestors;
        /** Mempool entry constructed for this transaction. Constructed in PreChecks() but not
         * inserted into the mempool until Finalize(). */
        std::unique_ptr<CTxMemPoolEntry> m_entry;
        /** Pointers to the transactions that have been removed from the mempool and replaced by
         * this transaction, used to return to the MemPoolAccept caller. Only populated if
         * validation is successful and the original transactions are removed. */
        std::list<CTransactionRef> m_replaced_transactions;

        /** Virtual size of the transaction as used by the mempool, calculated using serialized size
         * of the transaction and sigops. */
        int64_t m_vsize;
        /** Fees paid by this transaction: total input amounts subtracted by total output amounts. */
        CAmount m_base_fees;
        /** Base fees + any fee delta set by the user with prioritisetransaction. */
        CAmount m_modified_fees;
        /** Total modified fees of all transactions being replaced. */
        CAmount m_conflicting_fees{0};
        /** Total virtual size of all transactions being replaced. */
        size_t m_conflicting_size{0};

        const CTransactionRef& m_ptx;
        /** Txid. */
        const uint256& m_hash;
        TxValidationState m_state;
        /** A temporary cache containing serialized transaction data for signature verification.
         * Reused across PolicyScriptChecks and ConsensusScriptChecks. */
        PrecomputedTransactionData m_precomputed_txdata;
    };

    // Run the policy checks on a given transaction, excluding any script checks.
    // Looks up inputs, calculates feerate, considers replacement, evaluates