[rpc] add unbroadcast info to mempool entries and getmempoolinfo

- expose info about number of txns in unbroadcast set and whether a mempool entry's tx has passed initial broadcast
- makes rpcs more informative and allows for more explicit testing, eg tracking if tx is in unbroadcast set
before and after originating node connects to peers (adds this in mempool_unbroadcast.py)
- adds mempool method IsUnbroadcastTx to query for tx inclusion in  mempool's unbroadcast set

1 files changed, 6 insertions, 0 deletions

diff --git a/src/txmempool.h b/src/txmempool.h
index 4bee78b8d..0f3ae3630 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -716,6 +716,12 @@ public:
         return m_unbroadcast_txids;
     }
 
+    // Returns if a txid is in the unbroadcast set
+    bool IsUnbroadcastTx(const uint256& txid) const {
+        LOCK(cs);
+        return (m_unbroadcast_txids.count(txid) != 0);
+    }
+
 private:
     /** UpdateForDescendants is used by UpdateTransactionsFromBlock to update
      *  the descendants for a single transaction that has been added to the