Merge #19044: net processing: Add support for getcfilters

9e36067d8c [test] Add test for cfilters. (Jim Posen)
11106a4722 [net processing] Message handling for getcfilters. (Jim Posen)
e535670726 [indexes] Fix default [de]serialization of BlockFilter. (Jim Posen)
bb911ae7f5 [refactor] Pass CNode and CConnman by reference (John Newbery)

Pull request description:

  Support `getcfilters` requests when `-peerblockfilters` is set.

  Does not advertise compact filter support in version messages.

ACKs for top commit:
  Empact:
    re-Code Review ACK 9e36067d8c
  MarcoFalke:
    re-ACK 9e36067d8c , only change is adding commit "[refactor] Pass CNode and CConnman by reference" 🥑
  jkczyz:
    ACK 9e36067d8c
  fjahr:
    Code review ACK 9e36067d8c

Tree-SHA512: b45b42a25905ef0bd9e195029185300c86856c87f78cbe17921f4a25e159ae0f6f003e61714fa43779017eb97cd89d3568419be88e47d19dc8095562939e7887

test/functional/test_framework/mininode.py

@@ -31,8 +31,9 @@ from test_framework.messages import (
     msg_block,
     MSG_BLOCK,
     msg_blocktxn,
-    msg_cfheaders,
     msg_cfcheckpt,
+    msg_cfheaders,
+    msg_cfilter,
     msg_cmpctblock,
     msg_feefilter,
     msg_filteradd,
@@ -69,8 +70,9 @@ MESSAGEMAP = {
     b"addr": msg_addr,
     b"block": msg_block,
     b"blocktxn": msg_blocktxn,
-    b"cfheaders": msg_cfheaders,
     b"cfcheckpt": msg_cfcheckpt,
+    b"cfheaders": msg_cfheaders,
+    b"cfilter": msg_cfilter,
     b"cmpctblock": msg_cmpctblock,
     b"feefilter": msg_feefilter,
     b"filteradd": msg_filteradd,
@@ -332,8 +334,9 @@ class P2PInterface(P2PConnection):
     def on_addr(self, message): pass
     def on_block(self, message): pass
     def on_blocktxn(self, message): pass
-    def on_cfheaders(self, message): pass
     def on_cfcheckpt(self, message): pass
+    def on_cfheaders(self, message): pass
+    def on_cfilter(self, message): pass
     def on_cmpctblock(self, message): pass
     def on_feefilter(self, message): pass
     def on_filteradd(self, message): pass