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117 lines
5.5 KiB
117 lines
5.5 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2014-2017 The Bitcoin Core developers |
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# Distributed under the MIT software license, see the accompanying |
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# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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"""Test mempool persistence. |
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By default, bitcoind will dump mempool on shutdown and |
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then reload it on startup. This can be overridden with |
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the -persistmempool=0 command line option. |
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Test is as follows: |
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- start node0, node1 and node2. node1 has -persistmempool=0 |
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- create 5 transactions on node2 to its own address. Note that these |
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are not sent to node0 or node1 addresses because we don't want |
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them to be saved in the wallet. |
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- check that node0 and node1 have 5 transactions in their mempools |
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- shutdown all nodes. |
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- startup node0. Verify that it still has 5 transactions |
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in its mempool. Shutdown node0. This tests that by default the |
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mempool is persistent. |
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- startup node1. Verify that its mempool is empty. Shutdown node1. |
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This tests that with -persistmempool=0, the mempool is not |
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dumped to disk when the node is shut down. |
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- Restart node0 with -persistmempool=0. Verify that its mempool is |
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empty. Shutdown node0. This tests that with -persistmempool=0, |
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the mempool is not loaded from disk on start up. |
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- Restart node0 with -persistmempool. Verify that it has 5 |
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transactions in its mempool. This tests that -persistmempool=0 |
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does not overwrite a previously valid mempool stored on disk. |
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- Remove node0 mempool.dat and verify savemempool RPC recreates it |
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and verify that node1 can load it and has 5 transaction in its |
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mempool. |
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- Verify that savemempool throws when the RPC is called if |
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node1 can't write to disk. |
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""" |
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import os |
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import time |
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from test_framework.test_framework import BitcoinTestFramework |
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from test_framework.util import * |
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class MempoolPersistTest(BitcoinTestFramework): |
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def set_test_params(self): |
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self.num_nodes = 3 |
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self.extra_args = [[], ["-persistmempool=0"], []] |
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def run_test(self): |
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chain_height = self.nodes[0].getblockcount() |
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assert_equal(chain_height, 200) |
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self.log.debug("Mine a single block to get out of IBD") |
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self.nodes[0].generate(1) |
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self.sync_all() |
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self.log.debug("Send 5 transactions from node2 (to its own address)") |
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for i in range(5): |
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self.nodes[2].sendtoaddress(self.nodes[2].getnewaddress(), Decimal("10")) |
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node2_balance = self.nodes[2].getbalance() |
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self.sync_all() |
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self.log.debug("Verify that node0 and node1 have 5 transactions in their mempools") |
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assert_equal(len(self.nodes[0].getrawmempool()), 5) |
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assert_equal(len(self.nodes[1].getrawmempool()), 5) |
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self.log.debug("Stop-start the nodes. Verify that node0 has the transactions in its mempool and node1 does not. Verify that node2 calculates its balance correctly after loading wallet transactions.") |
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self.stop_nodes() |
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self.start_node(1) # Give this one a head-start, so we can be "extra-sure" that it didn't load anything later |
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self.start_node(0) |
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self.start_node(2) |
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# Give bitcoind a second to reload the mempool |
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wait_until(lambda: len(self.nodes[0].getrawmempool()) == 5, timeout=1) |
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wait_until(lambda: len(self.nodes[2].getrawmempool()) == 5, timeout=1) |
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# The others have loaded their mempool. If node_1 loaded anything, we'd probably notice by now: |
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assert_equal(len(self.nodes[1].getrawmempool()), 0) |
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# Verify accounting of mempool transactions after restart is correct |
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self.nodes[2].syncwithvalidationinterfacequeue() # Flush mempool to wallet |
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assert_equal(node2_balance, self.nodes[2].getbalance()) |
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self.log.debug("Stop-start node0 with -persistmempool=0. Verify that it doesn't load its mempool.dat file.") |
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self.stop_nodes() |
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self.start_node(0, extra_args=["-persistmempool=0"]) |
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# Give bitcoind a second to reload the mempool |
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time.sleep(1) |
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assert_equal(len(self.nodes[0].getrawmempool()), 0) |
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self.log.debug("Stop-start node0. Verify that it has the transactions in its mempool.") |
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self.stop_nodes() |
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self.start_node(0) |
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wait_until(lambda: len(self.nodes[0].getrawmempool()) == 5) |
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mempooldat0 = os.path.join(self.options.tmpdir, 'node0', 'regtest', 'mempool.dat') |
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mempooldat1 = os.path.join(self.options.tmpdir, 'node1', 'regtest', 'mempool.dat') |
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self.log.debug("Remove the mempool.dat file. Verify that savemempool to disk via RPC re-creates it") |
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os.remove(mempooldat0) |
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self.nodes[0].savemempool() |
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assert os.path.isfile(mempooldat0) |
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self.log.debug("Stop nodes, make node1 use mempool.dat from node0. Verify it has 5 transactions") |
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os.rename(mempooldat0, mempooldat1) |
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self.stop_nodes() |
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self.start_node(1, extra_args=[]) |
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wait_until(lambda: len(self.nodes[1].getrawmempool()) == 5) |
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self.log.debug("Prevent kevacoind from writing mempool.dat to disk. Verify that `savemempool` fails") |
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# to test the exception we are setting bad permissions on a tmp file called mempool.dat.new |
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# which is an implementation detail that could change and break this test |
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mempooldotnew1 = mempooldat1 + '.new' |
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with os.fdopen(os.open(mempooldotnew1, os.O_CREAT, 0o000), 'w'): |
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pass |
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assert_raises_rpc_error(-1, "Unable to dump mempool to disk", self.nodes[1].savemempool) |
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os.remove(mempooldotnew1) |
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if __name__ == '__main__': |
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MempoolPersistTest().main()
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