Merge #21162: Net Processing: Move RelayTransaction() into PeerManager

680eb56d828ce358b4e000c140f5b247ff5e6179 [net processing] Don't pass CConnman to RelayTransactions (John Newbery)
a38a4e8f039dfabfd9435f3a63f1a9b56de086d6 [net processing] Move RelayTransaction into PeerManager (John Newbery)

Pull request description:

  This is the first part of #21160. It moves the RelayTransaction() function to be a member function of the PeerManager class. This is required in order to move the transaction inventory data into the Peer object, since Peer objects are only accessible from within PeerManager.

ACKs for top commit:
  ajtowns:
    ACK 680eb56d828ce358b4e000c140f5b247ff5e6179

Tree-SHA512: 8c93491a4392b6369bb7f090de326a63cd62a088de59026e202f226f64ded50a0cf1a95ed703328860f02a9d2f64d3a87ca1bca9a6075b978bd111d384766235

3 files changed, 17 insertions, 15 deletions

diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index 8ffbd45034..3084b0b515 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -247,6 +247,7 @@ public:
     bool GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats) override;
     bool IgnoresIncomingTxs() override { return m_ignore_incoming_txs; }
     void SendPings() override;
+    void RelayTransaction(const uint256& txid, const uint256& wtxid) override;
     void SetBestHeight(int height) override { m_best_height = height; };
     void Misbehaving(const NodeId pnode, const int howmuch, const std::string& message) override;
     void ProcessMessage(CNode& pfrom, const std::string& msg_type, CDataStream& vRecv,
@@ -260,7 +261,7 @@ private:
     void EvictExtraOutboundPeers(int64_t time_in_seconds) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
 
     /** Retrieve unbroadcast transactions from the mempool and reattempt sending to peers */
-    void ReattemptInitialBroadcast(CScheduler& scheduler) const;
+    void ReattemptInitialBroadcast(CScheduler& scheduler);
 
     /** Get a shared pointer to the Peer object.
      *  May return an empty shared_ptr if the Peer object can't be found. */
@@ -949,7 +950,7 @@ void PeerManagerImpl::InitializeNode(CNode *pnode)
     }
 }
 
-void PeerManagerImpl::ReattemptInitialBroadcast(CScheduler& scheduler) const
+void PeerManagerImpl::ReattemptInitialBroadcast(CScheduler& scheduler)
 {
     std::set<uint256> unbroadcast_txids = m_mempool.GetUnbroadcastTxs();
 
@@ -958,7 +959,7 @@ void PeerManagerImpl::ReattemptInitialBroadcast(CScheduler& scheduler) const
 
         if (tx != nullptr) {
             LOCK(cs_main);
-            RelayTransaction(txid, tx->GetWitnessHash(), m_connman);
+            RelayTransaction(txid, tx->GetWitnessHash());
         } else {
             m_mempool.RemoveUnbroadcastTx(txid, true);
         }
@@ -1460,9 +1461,9 @@ void PeerManagerImpl::SendPings()
     for(auto& it : m_peer_map) it.second->m_ping_queued = true;
 }
 
-void RelayTransaction(const uint256& txid, const uint256& wtxid, const CConnman& connman)
+void PeerManagerImpl::RelayTransaction(const uint256& txid, const uint256& wtxid)
 {
-    connman.ForEachNode([&txid, &wtxid](CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
+    m_connman.ForEachNode([&txid, &wtxid](CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
         AssertLockHeld(::cs_main);
 
         CNodeState* state = State(pnode->GetId());
@@ -2042,7 +2043,7 @@ void PeerManagerImpl::ProcessOrphanTx(std::set<uint256>& orphan_work_set)
 
         if (result.m_result_type == MempoolAcceptResult::ResultType::VALID) {
             LogPrint(BCLog::MEMPOOL, "   accepted orphan tx %s\n", orphanHash.ToString());
-            RelayTransaction(orphanHash, porphanTx->GetWitnessHash(), m_connman);
+            RelayTransaction(orphanHash, porphanTx->GetWitnessHash());
             m_orphanage.AddChildrenToWorkSet(*porphanTx, orphan_work_set);
             m_orphanage.EraseTx(orphanHash);
             for (const CTransactionRef& removedTx : result.m_replaced_transactions.value()) {
@@ -3046,7 +3047,7 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
                     LogPrintf("Not relaying non-mempool transaction %s from forcerelay peer=%d\n", tx.GetHash().ToString(), pfrom.GetId());
                 } else {
                     LogPrintf("Force relaying tx %s from peer=%d\n", tx.GetHash().ToString(), pfrom.GetId());
-                    RelayTransaction(tx.GetHash(), tx.GetWitnessHash(), m_connman);
+                    RelayTransaction(tx.GetHash(), tx.GetWitnessHash());
                 }
             }
             return;
@@ -3061,7 +3062,7 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
             // requests for it.
             m_txrequest.ForgetTxHash(tx.GetHash());
             m_txrequest.ForgetTxHash(tx.GetWitnessHash());
-            RelayTransaction(tx.GetHash(), tx.GetWitnessHash(), m_connman);
+            RelayTransaction(tx.GetHash(), tx.GetWitnessHash());
             m_orphanage.AddChildrenToWorkSet(tx, peer->m_orphan_work_set);
 
             pfrom.nLastTXTime = GetTime();
diff --git a/src/net_processing.h b/src/net_processing.h
index 6f900410a7..f6f2d73721 100644
--- a/src/net_processing.h
+++ b/src/net_processing.h
@@ -47,6 +47,10 @@ public:
     /** Whether this node ignores txs received over p2p. */
     virtual bool IgnoresIncomingTxs() = 0;
 
+    /** Relay transaction to all peers. */
+    virtual void RelayTransaction(const uint256& txid, const uint256& wtxid)
+        EXCLUSIVE_LOCKS_REQUIRED(cs_main) = 0;
+
     /** Send ping message to all peers */
     virtual void SendPings() = 0;
 
@@ -71,7 +75,4 @@ public:
                                 const std::chrono::microseconds time_received, const std::atomic<bool>& interruptMsgProc) = 0;
 };
 
-/** Relay transaction to every node */
-void RelayTransaction(const uint256& txid, const uint256& wtxid, const CConnman& connman) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
-
 #endif // BITCOIN_NET_PROCESSING_H
diff --git a/src/node/transaction.cpp b/src/node/transaction.cpp
index 97763f4fa2..f47e85aceb 100644
--- a/src/node/transaction.cpp
+++ b/src/node/transaction.cpp
@@ -29,9 +29,9 @@ static TransactionError HandleATMPError(const TxValidationState& state, std::str
 TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef tx, std::string& err_string, const CAmount& max_tx_fee, bool relay, bool wait_callback)
 {
     // BroadcastTransaction can be called by either sendrawtransaction RPC or wallet RPCs.
-    // node.connman is assigned both before chain clients and before RPC server is accepting calls,
-    // and reset after chain clients and RPC sever are stopped. node.connman should never be null here.
-    assert(node.connman);
+    // node.peerman is assigned both before chain clients and before RPC server is accepting calls,
+    // and reset after chain clients and RPC sever are stopped. node.peerman should never be null here.
+    assert(node.peerman);
     assert(node.mempool);
     std::promise<void> promise;
     uint256 hashTx = tx->GetHash();
@@ -101,7 +101,7 @@ TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef t
         node.mempool->AddUnbroadcastTx(hashTx);
 
         LOCK(cs_main);
-        RelayTransaction(hashTx, tx->GetWitnessHash(), *node.connman);
+        node.peerman->RelayTransaction(hashTx, tx->GetWitnessHash());
     }
 
     return TransactionError::OK;