def send_get_headers(self, locator, hashstop):
msg = msg_getheaders()
msg.locator.vHave = locator
msg.hashstop = hashstop
self.send_message(msg)
def send_header_request(self, block_hash, node):
msg = msg_getheaders()
msg.hashstop = block_hash
node.send_message(msg)
def run_test(self):
# Start building a chain on node0. node2 shouldn't be able to sync until node1's
# minchainwork is exceeded
starting_chain_work = REGTEST_WORK_PER_BLOCK # Genesis block's work
self.log.info(
f"Testing relay across node 1 (minChainWork = {self.node_min_work[1]})"
)
starting_blockcount = self.nodes[2].getblockcount()
num_blocks_to_generate = int(
(self.node_min_work[1] - starting_chain_work) /
REGTEST_WORK_PER_BLOCK)
self.log.info(f"Generating {num_blocks_to_generate} blocks on node0")
hashes = self.generate(self.nodes[0],
num_blocks_to_generate,
sync_fun=self.no_op)
self.log.info(
f"Node0 current chain work: {self.nodes[0].getblockheader(hashes[-1])['chainwork']}"
)
# Sleep a few seconds and verify that node2 didn't get any new blocks
# or headers. We sleep, rather than sync_blocks(node0, node1) because
# it's reasonable either way for node1 to get the blocks, or not get
# them (since they're below node1's minchainwork).
time.sleep(3)
self.log.info("Verifying node 2 has no more blocks than before")
self.log.info(
f"Blockcounts: {[n.getblockcount() for n in self.nodes]}")
# Node2 shouldn't have any new headers yet, because node1 should not
# have relayed anything.
assert_equal(len(self.nodes[2].getchaintips()), 1)
assert_equal(self.nodes[2].getchaintips()[0]['height'], 0)
assert self.nodes[1].getbestblockhash(
) != self.nodes[0].getbestblockhash()
assert_equal(self.nodes[2].getblockcount(), starting_blockcount)
self.log.info("Check that getheaders requests to node2 are ignored")
peer = self.nodes[2].add_p2p_connection(P2PInterface())
msg = msg_getheaders()
msg.locator.vHave = [int(self.nodes[2].getbestblockhash(), 16)]
msg.hashstop = 0
peer.send_and_ping(msg)
time.sleep(5)
assert ("headers" not in peer.last_message
or len(peer.last_message["headers"].headers) == 0)
self.log.info("Generating one more block")
self.generate(self.nodes[0], 1)
self.log.info("Verifying nodes are all synced")
# Because nodes in regtest are all manual connections (eg using
# addnode), node1 should not have disconnected node0. If not for that,
# we'd expect node1 to have disconnected node0 for serving an
# insufficient work chain, in which case we'd need to reconnect them to
# continue the test.
self.sync_all()
self.log.info(
f"Blockcounts: {[n.getblockcount() for n in self.nodes]}")
self.log.info("Test that getheaders requests to node2 are not ignored")
peer.send_and_ping(msg)
assert "headers" in peer.last_message
# Verify that node2 is in fact still in IBD (otherwise this test may
# not be exercising the logic we want!)
assert_equal(self.nodes[2].getblockchaininfo()['initialblockdownload'],
True)
self.log.info("Test -minimumchainwork with a non-hex value")
self.stop_node(0)
self.nodes[0].assert_start_raises_init_error(
["-minimumchainwork=test"],
expected_msg=
'Error: Invalid non-hex (test) minimum chain work value specified',
)