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Test large reorgs with headerssync logic

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This commit is contained in:
Suhas Daftuar 2022-08-23 14:06:29 -04:00
parent 355547334f
commit 93eae27031
1 changed files with 30 additions and 3 deletions
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33
test/functional/p2p_headers_sync_with_minchainwork.py
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@ -30,18 +30,21 @@ class RejectLowDifficultyHeadersTest(BitcoinTestFramework):
self.setup_clean_chain = True
self.num_nodes = 3
# Node0 has no required chainwork; node1 requires 15 blocks on top of the genesis block; node2 requires 2047
self.extra_args = [["-minimumchainwork=0x0"], ["-minimumchainwork=0x1f"], ["-minimumchainwork=0x1000"]]
self.extra_args = [["-minimumchainwork=0x0", "-checkblockindex=0"], ["-minimumchainwork=0x1f", "-checkblockindex=0"], ["-minimumchainwork=0x1000", "-checkblockindex=0"]]
def setup_network(self):
self.setup_nodes()
self.connect_nodes(0, 1)
self.connect_nodes(0, 2)
self.reconnect_all()
self.sync_all()
def disconnect_all(self):
self.disconnect_nodes(0, 1)
self.disconnect_nodes(0, 2)
def reconnect_all(self):
self.connect_nodes(0, 1)
self.connect_nodes(0, 2)
def test_chains_sync_when_long_enough(self):
self.log.info("Generate blocks on the node with no required chainwork, and verify nodes 1 and 2 have no new headers in their headers tree")
with self.nodes[1].assert_debug_log(expected_msgs=["[net] Ignoring low-work chain (height=14)"]), self.nodes[2].assert_debug_log(expected_msgs=["[net] Ignoring low-work chain (height=14)"]):
@ -107,11 +110,35 @@ class RejectLowDifficultyHeadersTest(BitcoinTestFramework):
# getpeerinfo should show a sync in progress
assert_equal(node.getpeerinfo()[0]['presynced_headers'], 2000)
def test_large_reorgs_can_succeed(self):
self.log.info("Test that a 2000+ block reorg, starting from a point that is more than 2000 blocks before a locator entry, can succeed")
self.sync_all() # Ensure all nodes are synced.
self.disconnect_all()
# locator(block at height T) will have heights:
# [T, T-1, ..., T-10, T-12, T-16, T-24, T-40, T-72, T-136, T-264,
# T-520, T-1032, T-2056, T-4104, ...]
# So mine a number of blocks > 4104 to ensure that the first window of
# received headers during a sync are fully between locator entries.
BLOCKS_TO_MINE = 4110
self.generate(self.nodes[0], BLOCKS_TO_MINE, sync_fun=self.no_op)
self.generate(self.nodes[1], BLOCKS_TO_MINE+2, sync_fun=self.no_op)
self.reconnect_all()
self.sync_blocks(timeout=300) # Ensure tips eventually agree
def run_test(self):
self.test_chains_sync_when_long_enough()
self.test_large_reorgs_can_succeed()
self.test_peerinfo_includes_headers_presync_height()
if __name__ == '__main__':
RejectLowDifficultyHeadersTest().main()