Change AcceptToMemoryPool function signature

Combine fLimitFree and fOverrideMempoolLimit into a single boolean:
bypass_limits.  This is used to indicate that mempool limiting based on feerate
should be bypassed.  It is used when readding transactions from a reorg and then
the mempool is trimmed to size after all transactions are added and they can be
evaluated in the context of their descendants. No changes to behavior.

1 files changed, 15 insertions, 12 deletions

diff --git a/src/validation.cpp b/src/validation.cpp
index 0bd1ec672b..6bfa80ea7c 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -384,7 +384,9 @@ void UpdateMempoolForReorg(DisconnectedBlockTransactions &disconnectpool, bool f
     while (it != disconnectpool.queuedTx.get<insertion_order>().rend()) {
         // ignore validation errors in resurrected transactions
         CValidationState stateDummy;
-        if (!fAddToMempool || (*it)->IsCoinBase() || !AcceptToMemoryPool(mempool, stateDummy, *it, false, nullptr, nullptr, true)) {
+        if (!fAddToMempool || (*it)->IsCoinBase() ||
+            !AcceptToMemoryPool(mempool, stateDummy, *it, nullptr /* pfMissingInputs */,
+                                nullptr /* plTxnReplaced */, true /* bypass_limits */, 0 /* nAbsurdFee */)) {
             // If the transaction doesn't make it in to the mempool, remove any
             // transactions that depend on it (which would now be orphans).
             mempool.removeRecursive(**it, MemPoolRemovalReason::REORG);
@@ -443,9 +445,9 @@ static bool CheckInputsFromMempoolAndCache(const CTransaction& tx, CValidationSt
     return CheckInputs(tx, state, view, true, flags, cacheSigStore, true, txdata);
 }
 
-static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool& pool, CValidationState& state, const CTransactionRef& ptx, bool fLimitFree,
+static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool& pool, CValidationState& state, const CTransactionRef& ptx,
                               bool* pfMissingInputs, int64_t nAcceptTime, std::list<CTransactionRef>* plTxnReplaced,
-                              bool fOverrideMempoolLimit, const CAmount& nAbsurdFee, std::vector<COutPoint>& coins_to_uncache)
+                              bool bypass_limits, const CAmount& nAbsurdFee, std::vector<COutPoint>& coins_to_uncache)
 {
     const CTransaction& tx = *ptx;
     const uint256 hash = tx.GetHash();
@@ -623,7 +625,7 @@ static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool
         }
 
         // No transactions are allowed below minRelayTxFee except from disconnected blocks
-        if (fLimitFree && nModifiedFees < ::minRelayTxFee.GetFee(nSize)) {
+        if (!bypass_limits && nModifiedFees < ::minRelayTxFee.GetFee(nSize)) {
             return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "min relay fee not met");
         }
 
@@ -865,7 +867,7 @@ static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool
         pool.addUnchecked(hash, entry, setAncestors, validForFeeEstimation);
 
         // trim mempool and check if tx was trimmed
-        if (!fOverrideMempoolLimit) {
+        if (!bypass_limits) {
             LimitMempoolSize(pool, gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000, gArgs.GetArg("-mempoolexpiry", DEFAULT_MEMPOOL_EXPIRY) * 60 * 60);
             if (!pool.exists(hash))
                 return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "mempool full");
@@ -878,12 +880,12 @@ static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool
 }
 
 /** (try to) add transaction to memory pool with a specified acceptance time **/
-static bool AcceptToMemoryPoolWithTime(const CChainParams& chainparams, CTxMemPool& pool, CValidationState &state, const CTransactionRef &tx, bool fLimitFree,
+static bool AcceptToMemoryPoolWithTime(const CChainParams& chainparams, CTxMemPool& pool, CValidationState &state, const CTransactionRef &tx,
                         bool* pfMissingInputs, int64_t nAcceptTime, std::list<CTransactionRef>* plTxnReplaced,
-                        bool fOverrideMempoolLimit, const CAmount nAbsurdFee)
+                        bool bypass_limits, const CAmount nAbsurdFee)
 {
     std::vector<COutPoint> coins_to_uncache;
-    bool res = AcceptToMemoryPoolWorker(chainparams, pool, state, tx, fLimitFree, pfMissingInputs, nAcceptTime, plTxnReplaced, fOverrideMempoolLimit, nAbsurdFee, coins_to_uncache);
+    bool res = AcceptToMemoryPoolWorker(chainparams, pool, state, tx, pfMissingInputs, nAcceptTime, plTxnReplaced, bypass_limits, nAbsurdFee, coins_to_uncache);
     if (!res) {
         for (const COutPoint& hashTx : coins_to_uncache)
             pcoinsTip->Uncache(hashTx);
@@ -894,12 +896,12 @@ static bool AcceptToMemoryPoolWithTime(const CChainParams& chainparams, CTxMemPo
     return res;
 }
 
-bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransactionRef &tx, bool fLimitFree,
+bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransactionRef &tx,
                         bool* pfMissingInputs, std::list<CTransactionRef>* plTxnReplaced,
-                        bool fOverrideMempoolLimit, const CAmount nAbsurdFee)
+                        bool bypass_limits, const CAmount nAbsurdFee)
 {
     const CChainParams& chainparams = Params();
-    return AcceptToMemoryPoolWithTime(chainparams, pool, state, tx, fLimitFree, pfMissingInputs, GetTime(), plTxnReplaced, fOverrideMempoolLimit, nAbsurdFee);
+    return AcceptToMemoryPoolWithTime(chainparams, pool, state, tx, pfMissingInputs, GetTime(), plTxnReplaced, bypass_limits, nAbsurdFee);
 }
 
 /** Return transaction in txOut, and if it was found inside a block, its hash is placed in hashBlock */
@@ -4306,7 +4308,8 @@ bool LoadMempool(void)
             CValidationState state;
             if (nTime + nExpiryTimeout > nNow) {
                 LOCK(cs_main);
-                AcceptToMemoryPoolWithTime(chainparams, mempool, state, tx, true, nullptr, nTime, nullptr, false, 0);
+                AcceptToMemoryPoolWithTime(chainparams, mempool, state, tx, nullptr /* pfMissingInputs */, nTime,
+                                           nullptr /* plTxnReplaced */, false /* bypass_limits */, 0 /* nAbsurdFee */);
                 if (state.IsValid()) {
                     ++count;
                 } else {