Merge #17984: test: Add p2p test for forcerelay permission

aaaae4d test: Add p2p test for forcerelay permission (MarcoFalke)
fa6b57b test: Fix whitespace in p2p_permissions.py (MarcoFalke)
faf4081 test: Make msg_tx a witness tx (MarcoFalke)

Pull request description:

  The commit `test: Make msg_tx a witness tx` is needed so that the python mininode does not strip the witness from transactions before sending them over p2p. The commit should also be done to keep symmetry with msg_block. See:

  *  tests: Make msg_block a witness block #15982

ACKs for top commit:
  laanwj:
    ACK aaaae4d

Tree-SHA512: b4b546c88f7f0576cb512f0872bc6bef9d4df65783803f226986e56175937f418aa1ed906417ac909f27f1fd521d64629621fda83250fa925c46ef9513db0e4c

Author: laanwj

test/functional/p2p_permissions.py

@@ -7,21 +7,35 @@
 Test that permissions are correctly calculated and applied
 """
 
+from test_framework.address import ADDRESS_BCRT1_P2WSH_OP_TRUE
+from test_framework.messages import (
+    CTransaction,
+    CTxInWitness,
+    FromHex,
+)
+from test_framework.mininode import P2PDataStore
+from test_framework.script import (
+    CScript,
+    OP_TRUE,
+)
 from test_framework.test_node import ErrorMatch
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
     connect_nodes,
     p2p_port,
+    wait_until,
 )
 
+
 class P2PPermissionsTests(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 2
         self.setup_clean_chain = True
-        self.extra_args = [[],[]]
 
     def run_test(self):
+        self.check_tx_relay()
+
         self.checkpermission(
             # default permissions (no specific permissions)
             ["-whitelist=127.0.0.1"],
@@ -48,9 +62,9 @@ def run_test(self):
         ip_port = "127.0.0.1:{}".format(p2p_port(1))
         self.replaceinconfig(1, "bind=127.0.0.1", "whitebind=bloomfilter,forcerelay@" + ip_port)
         self.checkpermission(
-            ["[email protected]" ],
+            ["[email protected]"],
             # Check parameter interaction forcerelay should activate relay
-            ["noban", "bloomfilter", "forcerelay", "relay" ],
+            ["noban", "bloomfilter", "forcerelay", "relay"],
             False)
         self.replaceinconfig(1, "whitebind=bloomfilter,forcerelay@" + ip_port, "bind=127.0.0.1")
 
@@ -83,6 +97,41 @@ def run_test(self):
         self.nodes[1].assert_start_raises_init_error(["[email protected]:230"], "Invalid netmask specified in", match=ErrorMatch.PARTIAL_REGEX)
         self.nodes[1].assert_start_raises_init_error(["[email protected]/10"], "Cannot resolve -whitebind address", match=ErrorMatch.PARTIAL_REGEX)
 
+    def check_tx_relay(self):
+        block_op_true = self.nodes[0].getblock(self.nodes[0].generatetoaddress(100, ADDRESS_BCRT1_P2WSH_OP_TRUE)[0])
+        self.sync_all()
+
+        self.log.debug("Create a connection from a whitelisted wallet that rebroadcasts raw txs")
+        # A python mininode is needed to send the raw transaction directly. If a full node was used, it could only
+        # rebroadcast via the inv-getdata mechanism. However, even for whitelisted connections, a full node would
+        # currently not request a txid that is already in the mempool.
+        self.restart_node(1, extra_args=["[email protected]"])
+        p2p_rebroadcast_wallet = self.nodes[1].add_p2p_connection(P2PDataStore())
+
+        self.log.debug("Send a tx from the wallet initially")
+        tx = FromHex(
+            CTransaction(),
+            self.nodes[0].createrawtransaction(
+                inputs=[{
+                    'txid': block_op_true['tx'][0],
+                    'vout': 0,
+                }], outputs=[{
+                    ADDRESS_BCRT1_P2WSH_OP_TRUE: 5,
+                }]),
+        )
+        tx.wit.vtxinwit = [CTxInWitness()]
+        tx.wit.vtxinwit[0].scriptWitness.stack = [CScript([OP_TRUE])]
+        txid = tx.rehash()
+
+        self.log.debug("Wait until tx is in node[1]'s mempool")
+        p2p_rebroadcast_wallet.send_txs_and_test([tx], self.nodes[1])
+
+        self.log.debug("Check that node[1] will send the tx to node[0] even though it is already in the mempool")
+        connect_nodes(self.nodes[1], 0)
+        with self.nodes[1].assert_debug_log(["Force relaying tx {} from whitelisted peer=0".format(txid)]):
+            p2p_rebroadcast_wallet.send_txs_and_test([tx], self.nodes[1])
+            wait_until(lambda: txid in self.nodes[0].getrawmempool())
+
     def checkpermission(self, args, expectedPermissions, whitelisted):
         self.restart_node(1, args)
         connect_nodes(self.nodes[0], 1)
@@ -95,9 +144,10 @@ def checkpermission(self, args, expectedPermissions, whitelisted):
 
     def replaceinconfig(self, nodeid, old, new):
         with open(self.nodes[nodeid].bitcoinconf, encoding="utf8") as f:
-            newText=f.read().replace(old, new)
+            newText = f.read().replace(old, new)
         with open(self.nodes[nodeid].bitcoinconf, 'w', encoding="utf8") as f:
             f.write(newText)
 
+
 if __name__ == '__main__':
     P2PPermissionsTests().main()

test/functional/p2p_segwit.py

@@ -31,7 +31,7 @@
     msg_inv,
     msg_tx,
     msg_block,
-    msg_witness_tx,
+    msg_no_witness_tx,
     ser_uint256,
     ser_vector,
     sha256,
@@ -125,10 +125,11 @@ def test_transaction_acceptance(node, p2p, tx, with_witness, accepted, reason=No
     - use the getrawmempool rpc to check for acceptance."""
     reason = [reason] if reason else []
     with node.assert_debug_log(expected_msgs=reason):
-        p2p.send_message(msg_witness_tx(tx) if with_witness else msg_tx(tx))
+        p2p.send_message(msg_tx(tx) if with_witness else msg_no_witness_tx(tx))
         p2p.sync_with_ping()
         assert_equal(tx.hash in node.getrawmempool(), accepted)
 
+
 def test_witness_block(node, p2p, block, accepted, with_witness=True, reason=None):
     """Send a block to the node and check that it's accepted
 
@@ -311,9 +312,9 @@ def test_non_witness_transaction(self):
 
         # Check that serializing it with or without witness is the same
         # This is a sanity check of our testing framework.
-        assert_equal(msg_tx(tx).serialize(), msg_witness_tx(tx).serialize())
+        assert_equal(msg_no_witness_tx(tx).serialize(), msg_tx(tx).serialize())
 
-        self.test_node.send_message(msg_witness_tx(tx))
+        self.test_node.send_message(msg_tx(tx))
         self.test_node.sync_with_ping()  # make sure the tx was processed
         assert tx.hash in self.nodes[0].getrawmempool()
         # Save this transaction for later

test/functional/test_framework/address.py

@@ -13,6 +13,8 @@
 
 ADDRESS_BCRT1_UNSPENDABLE = 'bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj'
 ADDRESS_BCRT1_UNSPENDABLE_DESCRIPTOR = 'addr(bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj)#juyq9d97'
+# Coins sent to this address can be spent with a witness stack of just OP_TRUE
+ADDRESS_BCRT1_P2WSH_OP_TRUE = 'bcrt1qft5p2uhsdcdc3l2ua4ap5qqfg4pjaqlp250x7us7a8qqhrxrxfsqseac85'
 
 
 class AddressType(enum.Enum):

test/functional/test_framework/messages.py

@@ -1105,17 +1105,17 @@ def deserialize(self, f):
         self.tx.deserialize(f)
 
     def serialize(self):
-        return self.tx.serialize_without_witness()
+        return self.tx.serialize_with_witness()
 
     def __repr__(self):
         return "msg_tx(tx=%s)" % (repr(self.tx))
 
 
-class msg_witness_tx(msg_tx):
+class msg_no_witness_tx(msg_tx):
     __slots__ = ()
 
     def serialize(self):
-        return self.tx.serialize_with_witness()
+        return self.tx.serialize_without_witness()
 
 
 class msg_block: