RPC: add 'getrawmempool', listing all transaction ids in memory pool

src/main.cpp

@@ -652,7 +652,15 @@ bool CTxMemPool::remove(CTransaction &tx)
     return true;
 }
 
+void CTxMemPool::queryHashes(std::vector<uint256>& vtxid)
+{
+    vtxid.clear();
 
+    LOCK(cs);
+    vtxid.reserve(mapTx.size());
+    for (map<uint256, CTransaction>::iterator mi = mapTx.begin(); mi != mapTx.end(); ++mi)
+        vtxid.push_back((*mi).first);
+}