#!/usr/bin/env python3 # Copyright (c) 2014-2021 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 set_test_params(self): self.num_nodes = 2 self.setup_clean_chain = True # The experimental syscall sandbox feature (-sandbox) is not compatible with -alertnotify, # -blocknotify or -walletnotify (which all invoke execve). self.disable_syscall_sandbox = 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") os.mkdir(self.alertnotify_dir) os.mkdir(self.blocknotify_dir) os.mkdir(self.walletnotify_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"-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 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()