rpc: add entry time to getorphantxs

Github-Pull: bitcoin#31043
Rebased-From: 808a708

Author: tdb3

src/rpc/mempool.cpp

@@ -862,6 +862,7 @@ static std::vector<RPCResult> OrphanDescription()
         RPCResult{RPCResult::Type::NUM, "bytes", "The serialized transaction size in bytes"},
         RPCResult{RPCResult::Type::NUM, "vsize", "The virtual transaction size as defined in BIP 141. This is different from actual serialized size for witness transactions as witness data is discounted."},
         RPCResult{RPCResult::Type::NUM, "weight", "The transaction weight as defined in BIP 141."},
+        RPCResult{RPCResult::Type::NUM_TIME, "entry", "The entry time into the orphanage expressed in " + UNIX_EPOCH_TIME},
         RPCResult{RPCResult::Type::NUM_TIME, "expiration", "The orphan expiration time expressed in " + UNIX_EPOCH_TIME},
         RPCResult{RPCResult::Type::ARR, "from", "",
         {
@@ -878,6 +879,7 @@ static UniValue OrphanToJSON(const TxOrphanage::OrphanTxBase& orphan)
     o.pushKV("bytes", orphan.tx->GetTotalSize());
     o.pushKV("vsize", GetVirtualTransactionSize(*orphan.tx));
     o.pushKV("weight", GetTransactionWeight(*orphan.tx));
+    o.pushKV("entry", int64_t{TicksSinceEpoch<std::chrono::seconds>(orphan.nTimeExpire - ORPHAN_TX_EXPIRE_TIME)});
     o.pushKV("expiration", int64_t{TicksSinceEpoch<std::chrono::seconds>(orphan.nTimeExpire)});
     UniValue from(UniValue::VARR);
     from.push_back(orphan.fromPeer); // only one fromPeer for now