bb8ae2c419
And use it to fix a race condition in mempool_persist.py: https://travis-ci.org/Empact/bitcoin/jobs/487577243 Since e.g. getrawmempool returns errors based on this status, this enables users to test it for readiness.
136 lines
6.4 KiB
Python
Executable file
136 lines
6.4 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2014-2018 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 transactions 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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from decimal import Decimal
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import os
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal, assert_raises_rpc_error, wait_until
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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 skip_test_if_missing_module(self):
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self.skip_if_no_wallet()
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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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last_txid = 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("Prioritize a transaction on node0")
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fees = self.nodes[0].getmempoolentry(txid=last_txid)['fees']
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assert_equal(fees['base'], fees['modified'])
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self.nodes[0].prioritisetransaction(txid=last_txid, fee_delta=1000)
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fees = self.nodes[0].getmempoolentry(txid=last_txid)['fees']
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assert_equal(fees['base'] + Decimal('0.00001000'), fees['modified'])
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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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# Give this node a head-start, so we can be "extra-sure" that it didn't load anything later
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# Also don't store the mempool, to keep the datadir clean
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self.start_node(1, extra_args=["-persistmempool=0"])
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self.start_node(0)
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self.start_node(2)
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wait_until(lambda: self.nodes[0].getmempoolinfo()["loaded"], timeout=1)
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wait_until(lambda: self.nodes[2].getmempoolinfo()["loaded"], timeout=1)
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assert_equal(len(self.nodes[0].getrawmempool()), 5)
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assert_equal(len(self.nodes[2].getrawmempool()), 5)
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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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self.log.debug('Verify prioritization is loaded correctly')
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fees = self.nodes[0].getmempoolentry(txid=last_txid)['fees']
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assert_equal(fees['base'] + Decimal('0.00001000'), fees['modified'])
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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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wait_until(lambda: self.nodes[0].getmempoolinfo()["loaded"])
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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: self.nodes[0].getmempoolinfo()["loaded"])
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assert_equal(len(self.nodes[0].getrawmempool()), 5)
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mempooldat0 = os.path.join(self.nodes[0].datadir, 'regtest', 'mempool.dat')
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mempooldat1 = os.path.join(self.nodes[1].datadir, '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: self.nodes[1].getmempoolinfo()["loaded"])
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assert_equal(len(self.nodes[1].getrawmempool()), 5)
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self.log.debug("Prevent bitcoind from writing mempool.dat to disk. Verify that `savemempool` fails")
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# to test the exception we are creating a tmp folder 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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os.mkdir(mempooldotnew1)
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assert_raises_rpc_error(-1, "Unable to dump mempool to disk", self.nodes[1].savemempool)
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os.rmdir(mempooldotnew1)
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if __name__ == '__main__':
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MempoolPersistTest().main()
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