Class MemPoolAccept

src/validation.cpp:473–684

namespace {

class MemPoolAccept
{
public:
    explicit MemPoolAccept(CTxMemPool& mempool, CChainState& active_chainstate) : m_pool(mempool), m_view(&m_dummy), m_viewmempool(&active_chainstate.CoinsTip(), m_pool), m_active_chainstate(active_chainstate),
        m_limit_ancestors(gArgs.GetIntArg("-limitancestorcount", DEFAULT_ANCESTOR_LIMIT)),
        m_limit_ancestor_size(gArgs.GetIntArg("-limitancestorsize", DEFAULT_ANCESTOR_SIZE_LIMIT)*1000),
        m_limit_descendants(gArgs.GetIntArg("-limitdescendantcount", DEFAULT_DESCENDANT_LIMIT)),
        m_limit_descendant_size(gArgs.GetIntArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT)*1000) {
    }

    // We put the arguments we're handed into a struct, so we can pass them
    // around easier.
    struct ATMPArgs {
        const CChainParams& m_chainparams;
        const int64_t m_accept_time;
        const bool m_bypass_limits;
        /*
         * Return any outpoints which were not previously present in the coins
         * cache, but were added as a result of validating the tx for mempool
         * acceptance. This allows the caller to optionally remove the cache
         * additions if the associated transaction ends up being rejected by
         * the mempool.
         */
        std::vector<COutPoint>& m_coins_to_uncache;
        const bool m_test_accept;
        /** Whether we allow transactions to replace mempool transactions by BIP125 rules. If false,
         * any transaction spending the same inputs as a transaction in the mempool is considered
         * a conflict. */
        const bool m_allow_bip125_replacement;
        /** When true, the mempool will not be trimmed when individual transactions are submitted in
         * Finalize(). Instead, limits should be enforced at the end to ensure the package is not
         * partially submitted.
         */
        const bool m_package_submission;

        /** Parameters for single transaction mempool validation. */
        static ATMPArgs SingleAccept(const CChainParams& chainparams, int64_t accept_time,
                                     bool bypass_limits, std::vector<COutPoint>& coins_to_uncache,
                                     bool test_accept) {
            return ATMPArgs{/* m_chainparams */ chainparams,
                            /* m_accept_time */ accept_time,
                            /* m_bypass_limits */ bypass_limits,
                            /* m_coins_to_uncache */ coins_to_uncache,
                            /* m_test_accept */ test_accept,
                            /* m_allow_bip125_replacement */ true,
                            /* m_package_submission */ false,
            };
        }

        /** Parameters for test package mempool validation through testmempoolaccept. */
        static ATMPArgs PackageTestAccept(const CChainParams& chainparams, int64_t accept_time,
                                          std::vector<COutPoint>& coins_to_uncache) {
            return ATMPArgs{/* m_chainparams */ chainparams,
                            /* m_accept_time */ accept_time,
                            /* m_bypass_limits */ false,
                            /* m_coins_to_uncache */ coins_to_uncache,
                            /* m_test_accept */ true,
                            /* m_allow_bip125_replacement */ false,