We previously didn't for witness-stripped transactions due to compatibility concerns with
non-wtxid-relay peers.
The issue we were trying to prevent is attacker node A stripping the witness of a transaction
broadcast by honest node B and submitting it stripped to a large part of the network. It would
result in those nodes including the txid of the transaction (== witness-stripped wtxid) to their
recent reject filter, which would significantly hinder the propagation of the honest non-stripped
transaction if most connections on the network are txid based relay.
Support for wtxid based relay was released with 0.21 in January 2021 and is now ubiquitous on the
network. Therefore this concern does not apply anymore and we can get rid of this special case.
In the functional tests there are lots of cases where we assert != which
this new util will replace, we also are adding the imports and the new assertion
02942056fd test: fix intermittent failure in p2p_orphan_handling.py (Martin Zumsande)
Pull request description:
If the mocktime is bumped before the node has successfully disconnected the peer, the requests for both parents could be spread over two GETDATAS: The first time `GetRequestsToSend` is invoked it would only request one tx from peer2, because the other one would only be available after peer1 was disconnected and its outstanding txrequest cleared.
So two GETDATAs would be sent, which would make the test fail.
Fixes#31700
ACKs for top commit:
maflcko:
lgtm ACK 02942056fd
instagibbs:
ACK 02942056fd
Tree-SHA512: 769200898345da197d86d673d9506f08f0a64b72a456e7e7c988ac37450d9c54ec65da1c8447c566c8578f7cfccdc5723ea680e636bfbe0b3d38265e5ef57774
send_message only drops the bytes in a buffer and a sync is needed to
avoid intermittent test issues. Change the name of the method to make
this more apparent during review.
-BEGIN VERIFY SCRIPT-
sed -i 's/send_message(/send_without_ping(/g' $( git grep -l 'send_message(' )
-END VERIFY SCRIPT-
If we bump the mocktime before the node has successfully disconnected
the peer, the requests for both parents could be spread over
two GETDATAS, which would make the test fail.
3f4b104b1b test: make sure we are on sync with a peer before checking if they have sent a message (Sergi Delgado Segura)
Pull request description:
p2p_orphan_handling checks whether a message has not been requested slightly too soon, making the check always succeed. This passes unnoticed since the expected result is for the message to not have been received, but it will make the test not catch a relevant change that should make it fail.
An easy way to check this is the case is to modify one of the test cases to force a request within the expected time, and check how the request is not seen. After the change, the test would crash as expected:
```diff
index 963d92485c..30ab5f2035 100755
--- a/test/functional/p2p_orphan_handling.py
+++ b/test/functional/p2p_orphan_handling.py
@@ -186,9 +185,12 @@ class OrphanHandlingTest(BitcoinTestFramework):
parent_inv = CInv(t=MSG_WTX, h=int(tx_parent_arrives["tx"].getwtxid(), 16))
assert_equal(len(peer_spy.get_invs()), 0)
peer_spy.assert_no_immediate_response(msg_getdata([parent_inv]))
+ txid = 0xdeadbeef
+ peer_spy.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=txid)]))
# Request would be scheduled with this delay because it is not a preferred relay peer.
self.nodes[0].bumpmocktime(NONPREF_PEER_TX_DELAY)
+ peer_spy.assert_never_requested(int(txid))
peer_spy.assert_never_requested(int(tx_parent_arrives["txid"], 16))
peer_spy.assert_never_requested(int(tx_parent_doesnt_arrive["txid"], 16))
# Request would be scheduled with this delay because it is by txid.
```
It is worth noting that this is not seen in the cases where the message is expected to be received, because in such cases `assert_never_requested` is always after a `wait_....` method, which is already waiting for the node to sync on their end.
ACKs for top commit:
i-am-yuvi:
ACK 3f4b104b1b
instagibbs:
ACK 3f4b104b1b
glozow:
ACK 3f4b104b1b
Tree-SHA512: 321a6605d630bed2217b6374e999dbb84da14138263dd8adf65fe3a6cd7981a50c873beced9cf05cb6d747a912e91017c58e7d4323d25449c87d83095ff4cba9
p2p_orphan_handling checks whether a message has not been requested slightly
too soon, making the check always succeed. This passes unnoticed since the
expected result is for the message to not have been received, but it will make
the test not catch a relevant change that should make it fail
