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feature_notifications.py
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#!/usr/bin/env python3
# Copyright (c) 2014-2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test the -alertnotify, -blocknotify and -walletnotify options."""
import os
from test_framework.address import ADDRESS_BCRT1_UNSPENDABLE
from test_framework.descriptors import descsum_create
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
)
# Linux allow all characters other than \x00
# Windows disallow control characters (0-31) and /\?%:|"<>
FILE_CHAR_START = 32 if os.name == 'nt' else 1
FILE_CHAR_END = 128
FILE_CHARS_DISALLOWED = '/\\?%*:|"<>' if os.name == 'nt' else '/'
UNCONFIRMED_HASH_STRING = 'unconfirmed'
def notify_outputname(walletname, txid):
return txid if os.name == 'nt' else f'{walletname}_{txid}'
class NotificationsTest(BitcoinTestFramework):
def add_options(self, parser):
self.add_wallet_options(parser)
def set_test_params(self):
self.num_nodes = 2
self.setup_clean_chain = True
def setup_network(self):
self.wallet = ''.join(chr(i) for i in range(FILE_CHAR_START, FILE_CHAR_END) if chr(i) not in FILE_CHARS_DISALLOWED)
self.alertnotify_dir = os.path.join(self.options.tmpdir, "alertnotify")
self.blocknotify_dir = os.path.join(self.options.tmpdir, "blocknotify")
self.walletnotify_dir = os.path.join(self.options.tmpdir, "walletnotify")
self.shutdownnotify_dir = os.path.join(self.options.tmpdir, "shutdownnotify")
self.shutdownnotify_file = os.path.join(self.shutdownnotify_dir, "shutdownnotify.txt")
os.mkdir(self.alertnotify_dir)
os.mkdir(self.blocknotify_dir)
os.mkdir(self.walletnotify_dir)
os.mkdir(self.shutdownnotify_dir)
# -alertnotify and -blocknotify on node0, walletnotify on node1
self.extra_args = [[
f"-alertnotify=echo > {os.path.join(self.alertnotify_dir, '%s')}",
f"-blocknotify=echo > {os.path.join(self.blocknotify_dir, '%s')}",
f"-shutdownnotify=echo > {self.shutdownnotify_file}",
], [
f"-walletnotify=echo %h_%b > {os.path.join(self.walletnotify_dir, notify_outputname('%w', '%s'))}",
]]
self.wallet_names = [self.default_wallet_name, self.wallet]
super().setup_network()
def run_test(self):
if self.is_wallet_compiled():
# Setup the descriptors to be imported to the wallet
seed = "cTdGmKFWpbvpKQ7ejrdzqYT2hhjyb3GPHnLAK7wdi5Em67YLwSm9"
xpriv = "tprv8ZgxMBicQKsPfHCsTwkiM1KT56RXbGGTqvc2hgqzycpwbHqqpcajQeMRZoBD35kW4RtyCemu6j34Ku5DEspmgjKdt2qe4SvRch5Kk8B8A2v"
desc_imports = [{
"desc": descsum_create(f"wpkh({xpriv}/0/*)"),
"timestamp": 0,
"active": True,
"keypool": True,
},{
"desc": descsum_create(f"wpkh({xpriv}/1/*)"),
"timestamp": 0,
"active": True,
"keypool": True,
"internal": True,
}]
# Make the wallets and import the descriptors
# Ensures that node 0 and node 1 share the same wallet for the conflicting transaction tests below.
for i, name in enumerate(self.wallet_names):
self.nodes[i].createwallet(wallet_name=name, descriptors=self.options.descriptors, blank=True, load_on_startup=True)
if self.options.descriptors:
self.nodes[i].importdescriptors(desc_imports)
else:
self.nodes[i].sethdseed(True, seed)
self.log.info("test -blocknotify")
block_count = 10
blocks = self.generatetoaddress(self.nodes[1], block_count, self.nodes[1].getnewaddress() if self.is_wallet_compiled() else ADDRESS_BCRT1_UNSPENDABLE)
# wait at most 10 seconds for expected number of files before reading the content
self.wait_until(lambda: len(os.listdir(self.blocknotify_dir)) == block_count, timeout=10)
# directory content should equal the generated blocks hashes
assert_equal(sorted(blocks), sorted(os.listdir(self.blocknotify_dir)))
if self.is_wallet_compiled():
self.log.info("test -walletnotify")
# wait at most 10 seconds for expected number of files before reading the content
self.wait_until(lambda: len(os.listdir(self.walletnotify_dir)) == block_count, timeout=10)
# directory content should equal the generated transaction hashes
tx_details = list(map(lambda t: (t['txid'], t['blockheight'], t['blockhash']), self.nodes[1].listtransactions("*", block_count)))
self.expect_wallet_notify(tx_details)
self.log.info("test -walletnotify after rescan")
# rescan to force wallet notifications
self.nodes[1].rescanblockchain()
self.wait_until(lambda: len(os.listdir(self.walletnotify_dir)) == block_count, timeout=10)
self.connect_nodes(0, 1)
# directory content should equal the generated transaction hashes
tx_details = list(map(lambda t: (t['txid'], t['blockheight'], t['blockhash']), self.nodes[1].listtransactions("*", block_count)))
self.expect_wallet_notify(tx_details)
# Conflicting transactions tests.
# Generate spends from node 0, and check notifications
# triggered by node 1
self.log.info("test -walletnotify with conflicting transactions")
self.nodes[0].rescanblockchain()
self.generatetoaddress(self.nodes[0], 100, ADDRESS_BCRT1_UNSPENDABLE)
# Generate transaction on node 0, sync mempools, and check for
# notification on node 1.
tx1 = self.nodes[0].sendtoaddress(address=ADDRESS_BCRT1_UNSPENDABLE, amount=1, replaceable=True)
assert_equal(tx1 in self.nodes[0].getrawmempool(), True)
self.sync_mempools()
self.expect_wallet_notify([(tx1, -1, UNCONFIRMED_HASH_STRING)])
# Generate bump transaction, sync mempools, and check for bump1
# notification. In the future, per
# https://github.com/bitcoin/bitcoin/pull/9371, it might be better
# to have notifications for both tx1 and bump1.
bump1 = self.nodes[0].bumpfee(tx1)["txid"]
assert_equal(bump1 in self.nodes[0].getrawmempool(), True)
self.sync_mempools()
self.expect_wallet_notify([(bump1, -1, UNCONFIRMED_HASH_STRING)])
# Add bump1 transaction to new block, checking for a notification
# and the correct number of confirmations.
blockhash1 = self.generatetoaddress(self.nodes[0], 1, ADDRESS_BCRT1_UNSPENDABLE)[0]
blockheight1 = self.nodes[0].getblockcount()
self.sync_blocks()
self.expect_wallet_notify([(bump1, blockheight1, blockhash1)])
assert_equal(self.nodes[1].gettransaction(bump1)["confirmations"], 1)
# Generate a second transaction to be bumped.
tx2 = self.nodes[0].sendtoaddress(address=ADDRESS_BCRT1_UNSPENDABLE, amount=1, replaceable=True)
assert_equal(tx2 in self.nodes[0].getrawmempool(), True)
self.sync_mempools()
self.expect_wallet_notify([(tx2, -1, UNCONFIRMED_HASH_STRING)])
# Bump tx2 as bump2 and generate a block on node 0 while
# disconnected, then reconnect and check for notifications on node 1
# about newly confirmed bump2 and newly conflicted tx2.
self.disconnect_nodes(0, 1)
bump2 = self.nodes[0].bumpfee(tx2)["txid"]
blockhash2 = self.generatetoaddress(self.nodes[0], 1, ADDRESS_BCRT1_UNSPENDABLE, sync_fun=self.no_op)[0]
blockheight2 = self.nodes[0].getblockcount()
assert_equal(self.nodes[0].gettransaction(bump2)["confirmations"], 1)
assert_equal(tx2 in self.nodes[1].getrawmempool(), True)
self.connect_nodes(0, 1)
self.sync_blocks()
self.expect_wallet_notify([(bump2, blockheight2, blockhash2), (tx2, -1, UNCONFIRMED_HASH_STRING)])
assert_equal(self.nodes[1].gettransaction(bump2)["confirmations"], 1)
# TODO: add test for `-alertnotify` large fork notifications
self.log.info("test -shutdownnotify")
self.stop_nodes()
self.wait_until(lambda: os.path.isfile(self.shutdownnotify_file), timeout=10)
def expect_wallet_notify(self, tx_details):
self.wait_until(lambda: len(os.listdir(self.walletnotify_dir)) >= len(tx_details), timeout=10)
# Should have no more and no less files than expected
assert_equal(sorted(notify_outputname(self.wallet, tx_id) for tx_id, _, _ in tx_details), sorted(os.listdir(self.walletnotify_dir)))
# Should now verify contents of each file
for tx_id, blockheight, blockhash in tx_details:
fname = os.path.join(self.walletnotify_dir, notify_outputname(self.wallet, tx_id))
# Wait for the cached writes to hit storage
self.wait_until(lambda: os.path.getsize(fname) > 0, timeout=10)
with open(fname, 'rt', encoding='utf-8') as f:
text = f.read()
# Universal newline ensures '\n' on 'nt'
assert_equal(text[-1], '\n')
text = text[:-1]
if os.name == 'nt':
# On Windows, echo as above will append a whitespace
assert_equal(text[-1], ' ')
text = text[:-1]
expected = str(blockheight) + '_' + blockhash
assert_equal(text, expected)
for tx_file in os.listdir(self.walletnotify_dir):
os.remove(os.path.join(self.walletnotify_dir, tx_file))
if __name__ == '__main__':
NotificationsTest().main()