Merge #6256: backport: bitcoin#23590, 23061, 23694

7d170bd Merge bitcoin#23694: doc: Add missing optional to MempoolEntryDescription (MarcoFalke)
ed7ad7a Merge bitcoin#23061: Fix (inverse) meaning of -persistmempool (merge-script)
f5f69ae Merge bitcoin#23590: Crash debug builds when mempool ConsensusScriptChecks fails (MarcoFalke)

Pull request description:

  more bitcoin backports

ACKs for top commit:
  UdjinM6:
    utACK 7d170bd
  PastaPastaPasta:
    utACK 7d170bd

Tree-SHA512: 0332461598c9aa17476b591e98a2b3a952fcea0b7abbda604668b13745bf73268e0faba25a9338eabb8d27fe594c26804f8cc653c30c4f53e6b88f0f7fced287

src/rpc/blockchain.cpp

@@ -458,16 +458,16 @@ static RPCHelpMan getdifficulty()
 
 static std::vector<RPCResult> MempoolEntryDescription() { return {
     RPCResult{RPCResult::Type::NUM, "vsize", "virtual transaction size. This can be different from actual serialized size for high-sigop transactions."},
-    RPCResult{RPCResult::Type::STR_AMOUNT, "fee", "transaction fee in " + CURRENCY_UNIT + " (DEPRECATED)"},
-    RPCResult{RPCResult::Type::STR_AMOUNT, "modifiedfee", "transaction fee with fee deltas used for mining priority (DEPRECATED)"},
+    RPCResult{RPCResult::Type::STR_AMOUNT, "fee", /*optional=*/true, "transaction fee in " + CURRENCY_UNIT + " (DEPRECATED)"},
+    RPCResult{RPCResult::Type::STR_AMOUNT, "modifiedfee", /*optional=*/true, "transaction fee with fee deltas used for mining priority (DEPRECATED)"},
     RPCResult{RPCResult::Type::NUM_TIME, "time", "local time transaction entered pool in " + UNIX_EPOCH_TIME},
     RPCResult{RPCResult::Type::NUM, "height", "block height when transaction entered pool"},
     RPCResult{RPCResult::Type::NUM, "descendantcount", "number of in-mempool descendant transactions (including this one)"},
     RPCResult{RPCResult::Type::NUM, "descendantsize", "size of in-mempool descendants (including this one)"},
-    RPCResult{RPCResult::Type::STR_AMOUNT, "descendantfees", "modified fees (see above) of in-mempool descendants (including this one) (DEPRECATED)"},
+    RPCResult{RPCResult::Type::STR_AMOUNT, "descendantfees",  /*optional=*/true, "modified fees (see above) of in-mempool descendants (including this one) (DEPRECATED)"},
     RPCResult{RPCResult::Type::NUM, "ancestorcount", "number of in-mempool ancestor transactions (including this one)"},
     RPCResult{RPCResult::Type::NUM, "ancestorsize", "size of in-mempool ancestors (including this one)"},
-    RPCResult{RPCResult::Type::STR_AMOUNT, "ancestorfees", "modified fees (see above) of in-mempool ancestors (including this one) (DEPRECATED)"},
+    RPCResult{RPCResult::Type::STR_AMOUNT, "ancestorfees", /*optional=*/true, "modified fees (see above) of in-mempool ancestors (including this one) (DEPRECATED)"},
     RPCResult{RPCResult::Type::OBJ, "fees", "",
     {
         RPCResult{RPCResult::Type::STR_AMOUNT, "base", "transaction fee in " + CURRENCY_UNIT},

src/validation.cpp

@@ -825,8 +825,8 @@ bool MemPoolAccept::ConsensusScriptChecks(const ATMPArgs& args, Workspace& ws, P
     // transactions into the mempool can be exploited as a DoS attack.
     unsigned int currentBlockScriptVerifyFlags = GetBlockScriptFlags(m_active_chainstate.m_chain.Tip(), chainparams.GetConsensus());
     if (!CheckInputsFromMempoolAndCache(tx, state, m_view, m_pool, currentBlockScriptVerifyFlags, txdata, m_active_chainstate.CoinsTip())) {
-        return error("%s: BUG! PLEASE REPORT THIS! CheckInputScripts failed against latest-block but not STANDARD flags %s, %s",
-                __func__, hash.ToString(), state.ToString());
+        LogPrintf("BUG! PLEASE REPORT THIS! CheckInputScripts failed against latest-block but not STANDARD flags %s, %s\n", hash.ToString(), state.ToString());
+        return Assume(false);
     }
 
     return true;

test/functional/mempool_persist.py

@@ -154,7 +154,7 @@ def run_test(self):
         self.log.debug("Stop nodes, make node1 use mempool.dat from node0. Verify it has 6 transactions")
         os.rename(mempooldat0, mempooldat1)
         self.stop_nodes()
-        self.start_node(1, extra_args=[])
+        self.start_node(1, extra_args=["-persistmempool"])
         assert self.nodes[1].getmempoolinfo()["loaded"]
         assert_equal(len(self.nodes[1].getrawmempool()), 6)