Merge bitcoin/bitcoin#21562: [net processing] Various tidying up of PeerManagerImpl ctor

fde1bf4f6136638e84cdf9806eedaae08e841bbf [net processing] Default initialize m_recent_confirmed_transactions (John Newbery)
37dcd12d539e4a875581fa049aa0f7fafeb932a4 scripted-diff: Rename recentRejects (John Newbery)
cd9902ac5054c01228d52616bf85f7196364d4ff [net processing] Default initialize recentRejects (John Newbery)
a28bfd1d4cfa523a6abf3832dbfd6183cd546944 [net processing] Default initialize m_stale_tip_check_time (John Newbery)
9190b01d8dcf03b74e9b9e1653688a97ac171b37 [net processing] Add Orphanage empty consistency check (John Newbery)

Pull request description:

  - Use default initialization of PeerManagerImpl members where possible
  - Remove unique_ptr indirection where it's not needed

ACKs for top commit:
  MarcoFalke:
    ACK fde1bf4f6136638e84cdf9806eedaae08e841bbf 👞
  theStack:
    re-ACK fde1bf4f6136638e84cdf9806eedaae08e841bbf

Tree-SHA512: 7ddedcc972df8e933e1fbe5c88b8ea17df89e1e58fc769518512c5540e49dc8eddb3f47e78d1329a6fc5644d2c1d11c981f681fd633f5218bfa4b3e6a86f3d7b

src/net_processing.cpp

@@ -872,7 +872,7 @@ private:
      * million to make it highly unlikely for users to have issues with this
      * filter.
      *
-     * Memory used: 1.3MB
+     * Memory used: 1.3 MB
      */
     CRollingBloomFilter m_recent_rejects GUARDED_BY(::cs_main){120'000, 0.000'001};
     uint256 hashRecentRejectsChainTip GUARDED_BY(cs_main);
@@ -1620,6 +1620,7 @@ void PeerManagerImpl::FinalizeNode(const CNode& node) {
         assert(m_num_preferred_download_peers == 0);
         assert(m_peers_downloading_from == 0);
         assert(m_outbound_peers_with_protect_from_disconnect == 0);
+        assert(m_orphanage.Size() == 0);
     }
     } // cs_main
 

src/txorphanage.h

@@ -50,6 +50,13 @@ public:
      * (ie orphans that may have found their final missing parent, and so should be reconsidered for the mempool) */
     void AddChildrenToWorkSet(const CTransaction& tx, std::set<uint256>& orphan_work_set) const EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans);
 
+    /** Return how many entries exist in the orphange */
+    size_t Size() LOCKS_EXCLUDED(::g_cs_orphans)
+    {
+        LOCK(::g_cs_orphans);
+        return m_orphans.size();
+    }
+
 protected:
     struct OrphanTx {
         CTransactionRef tx;

test/functional/p2p_permissions.py

@@ -133,7 +133,7 @@ class P2PPermissionsTests(BitcoinTestFramework):
         tx.vout[0].nValue += 1
         txid = tx.rehash()
         # Send the transaction twice. The first time, it'll be rejected by ATMP because it conflicts
-        # with a mempool transaction. The second time, it'll be in the recentRejects filter.
+        # with a mempool transaction. The second time, it'll be in the m_recent_rejects filter.
         p2p_rebroadcast_wallet.send_txs_and_test(
             [tx],
             self.nodes[1],