[mempool] Revert unbroadcast set to tracking just txid

When I originally implemented the unbroadcast set in 18038, it just tracked
txids. After 18038 was merged, I offered a patch to 18044 to make the
unbroadcast changes compatible with wtxid relay. In this patch, I updated
`unbroadcast_txids` to a map of txid -> wtxid. Post merge review comments shed
light on the fact that this update was unnecessary, and distracting. So, this
commit updates the unbroadcast ids back to a set.

1 files changed, 7 insertions, 6 deletions

diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index ce4ac3cd7..e1007e071 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -889,15 +889,16 @@ void PeerLogicValidation::InitializeNode(CNode *pnode) {
 
 void PeerLogicValidation::ReattemptInitialBroadcast(CScheduler& scheduler) const
 {
-    std::map<uint256, uint256> unbroadcast_txids = m_mempool.GetUnbroadcastTxs();
+    std::set<uint256> unbroadcast_txids = m_mempool.GetUnbroadcastTxs();
 
-    for (const auto& elem : unbroadcast_txids) {
-        // Sanity check: all unbroadcast txns should exist in the mempool
-        if (m_mempool.exists(elem.first)) {
+    for (const auto& txid : unbroadcast_txids) {
+        CTransactionRef tx = m_mempool.get(txid);
+
+        if (tx != nullptr) {
             LOCK(cs_main);
-            RelayTransaction(elem.first, elem.second, m_connman);
+            RelayTransaction(txid, tx->GetWitnessHash(), m_connman);
         } else {
-            m_mempool.RemoveUnbroadcastTx(elem.first, true);
+            m_mempool.RemoveUnbroadcastTx(txid, true);
         }
     }