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authorGregory Sanders <gsanders87@gmail.com>2020-09-04 11:55:58 -0400
committerGregory Sanders <gsanders87@gmail.com>2020-09-22 11:34:30 -0400
commite76fc2b84d065c9d06010d0a10b316f1f9d36fb9 (patch)
treeb475b1d196ca37be27c8271f9b8f3b7c1830d848 /src/zmq/zmqabstractnotifier.cpp
parent1b615e61bfc464f215a1b48e6e27d1e8fc16b2d1 (diff)
Add 'sequence' zmq publisher to track all block (dis)connects, mempool deltas
Using the zmq notifications to avoid excessive mempool polling can be difficult given the current notifications available. It announces all transactions being added to mempool or included in blocks, but announces no evictions and gives no indication if the transaction is in the mempool or a block. Block notifications for zmq are also substandard, in that it only announces block tips, while all block transactions are still announced. This commit adds a unified stream which can be used to closely track mempool: 1) getrawmempool to fill out mempool knowledge 2) if txhash is announced, add or remove from set based on add/remove flag 3) if blockhash is announced, get block txn list, remove from those transactions local view of mempool 4) if we drop a sequence number, go to (1) The mempool sequence number starts at the value 1, and increments each time a transaction enters the mempool, or is evicted from the mempool for any reason, including block inclusion. The mempool sequence number is published via ZMQ for any transaction-related notification. These features allow for ZMQ/RPC consumer to track mempool state in a more exacting way, without unnecesarily polling getrawmempool. See interface_zmq.py::test_mempool_sync for example usage.
Diffstat (limited to 'src/zmq/zmqabstractnotifier.cpp')
-rw-r--r--src/zmq/zmqabstractnotifier.cpp20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/zmq/zmqabstractnotifier.cpp b/src/zmq/zmqabstractnotifier.cpp
index 0d0428f3c0..3938f6fd2c 100644
--- a/src/zmq/zmqabstractnotifier.cpp
+++ b/src/zmq/zmqabstractnotifier.cpp
@@ -22,3 +22,23 @@ bool CZMQAbstractNotifier::NotifyTransaction(const CTransaction &/*transaction*/
{
return true;
}
+
+bool CZMQAbstractNotifier::NotifyBlockConnect(const CBlockIndex * /*CBlockIndex*/)
+{
+ return true;
+}
+
+bool CZMQAbstractNotifier::NotifyBlockDisconnect(const CBlockIndex * /*CBlockIndex*/)
+{
+ return true;
+}
+
+bool CZMQAbstractNotifier::NotifyTransactionAcceptance(const CTransaction &/*transaction*/, uint64_t mempool_sequence)
+{
+ return true;
+}
+
+bool CZMQAbstractNotifier::NotifyTransactionRemoval(const CTransaction &/*transaction*/, uint64_t mempool_sequence)
+{
+ return true;
+}