aboutsummaryrefslogtreecommitdiff
path: root/test/functional/test_framework/util.py
blob: e9e7bbd8e4e89006c7416260ce8b02f9becaef1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
#!/usr/bin/env python3
# Copyright (c) 2014-2017 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Helpful routines for regression testing."""

from base64 import b64encode
from binascii import hexlify, unhexlify
from decimal import Decimal, ROUND_DOWN
import hashlib
import json
import logging
import os
import random
import re
from subprocess import CalledProcessError
import time

from . import coverage
from .authproxy import AuthServiceProxy, JSONRPCException

logger = logging.getLogger("TestFramework.utils")

# Assert functions
##################

def assert_fee_amount(fee, tx_size, fee_per_kB):
    """Assert the fee was in range"""
    target_fee = round(tx_size * fee_per_kB / 1000, 8)
    if fee < target_fee:
        raise AssertionError("Fee of %s BTC too low! (Should be %s BTC)" % (str(fee), str(target_fee)))
    # allow the wallet's estimation to be at most 2 bytes off
    if fee > (tx_size + 2) * fee_per_kB / 1000:
        raise AssertionError("Fee of %s BTC too high! (Should be %s BTC)" % (str(fee), str(target_fee)))

def assert_equal(thing1, thing2, *args):
    if thing1 != thing2 or any(thing1 != arg for arg in args):
        raise AssertionError("not(%s)" % " == ".join(str(arg) for arg in (thing1, thing2) + args))

def assert_greater_than(thing1, thing2):
    if thing1 <= thing2:
        raise AssertionError("%s <= %s" % (str(thing1), str(thing2)))

def assert_greater_than_or_equal(thing1, thing2):
    if thing1 < thing2:
        raise AssertionError("%s < %s" % (str(thing1), str(thing2)))

def assert_raises(exc, fun, *args, **kwds):
    assert_raises_message(exc, None, fun, *args, **kwds)

def assert_raises_message(exc, message, fun, *args, **kwds):
    try:
        fun(*args, **kwds)
    except JSONRPCException:
        raise AssertionError("Use assert_raises_rpc_error() to test RPC failures")
    except exc as e:
        if message is not None and message not in e.error['message']:
            raise AssertionError("Expected substring not found:" + e.error['message'])
    except Exception as e:
        raise AssertionError("Unexpected exception raised: " + type(e).__name__)
    else:
        raise AssertionError("No exception raised")

def assert_raises_process_error(returncode, output, fun, *args, **kwds):
    """Execute a process and asserts the process return code and output.

    Calls function `fun` with arguments `args` and `kwds`. Catches a CalledProcessError
    and verifies that the return code and output are as expected. Throws AssertionError if
    no CalledProcessError was raised or if the return code and output are not as expected.

    Args:
        returncode (int): the process return code.
        output (string): [a substring of] the process output.
        fun (function): the function to call. This should execute a process.
        args*: positional arguments for the function.
        kwds**: named arguments for the function.
    """
    try:
        fun(*args, **kwds)
    except CalledProcessError as e:
        if returncode != e.returncode:
            raise AssertionError("Unexpected returncode %i" % e.returncode)
        if output not in e.output:
            raise AssertionError("Expected substring not found:" + e.output)
    else:
        raise AssertionError("No exception raised")

def assert_raises_rpc_error(code, message, fun, *args, **kwds):
    """Run an RPC and verify that a specific JSONRPC exception code and message is raised.

    Calls function `fun` with arguments `args` and `kwds`. Catches a JSONRPCException
    and verifies that the error code and message are as expected. Throws AssertionError if
    no JSONRPCException was raised or if the error code/message are not as expected.

    Args:
        code (int), optional: the error code returned by the RPC call (defined
            in src/rpc/protocol.h). Set to None if checking the error code is not required.
        message (string), optional: [a substring of] the error string returned by the
            RPC call. Set to None if checking the error string is not required.
        fun (function): the function to call. This should be the name of an RPC.
        args*: positional arguments for the function.
        kwds**: named arguments for the function.
    """
    assert try_rpc(code, message, fun, *args, **kwds), "No exception raised"

def try_rpc(code, message, fun, *args, **kwds):
    """Tries to run an rpc command.

    Test against error code and message if the rpc fails.
    Returns whether a JSONRPCException was raised."""
    try:
        fun(*args, **kwds)
    except JSONRPCException as e:
        # JSONRPCException was thrown as expected. Check the code and message values are correct.
        if (code is not None) and (code != e.error["code"]):
            raise AssertionError("Unexpected JSONRPC error code %i" % e.error["code"])
        if (message is not None) and (message not in e.error['message']):
            raise AssertionError("Expected substring not found:" + e.error['message'])
        return True
    except Exception as e:
        raise AssertionError("Unexpected exception raised: " + type(e).__name__)
    else:
        return False

def assert_is_hex_string(string):
    try:
        int(string, 16)
    except Exception as e:
        raise AssertionError(
            "Couldn't interpret %r as hexadecimal; raised: %s" % (string, e))

def assert_is_hash_string(string, length=64):
    if not isinstance(string, str):
        raise AssertionError("Expected a string, got type %r" % type(string))
    elif length and len(string) != length:
        raise AssertionError(
            "String of length %d expected; got %d" % (length, len(string)))
    elif not re.match('[abcdef0-9]+$', string):
        raise AssertionError(
            "String %r contains invalid characters for a hash." % string)

def assert_array_result(object_array, to_match, expected, should_not_find=False):
    """
        Pass in array of JSON objects, a dictionary with key/value pairs
        to match against, and another dictionary with expected key/value
        pairs.
        If the should_not_find flag is true, to_match should not be found
        in object_array
        """
    if should_not_find:
        assert_equal(expected, {})
    num_matched = 0
    for item in object_array:
        all_match = True
        for key, value in to_match.items():
            if item[key] != value:
                all_match = False
        if not all_match:
            continue
        elif should_not_find:
            num_matched = num_matched + 1
        for key, value in expected.items():
            if item[key] != value:
                raise AssertionError("%s : expected %s=%s" % (str(item), str(key), str(value)))
            num_matched = num_matched + 1
    if num_matched == 0 and not should_not_find:
        raise AssertionError("No objects matched %s" % (str(to_match)))
    if num_matched > 0 and should_not_find:
        raise AssertionError("Objects were found %s" % (str(to_match)))

# Utility functions
###################

def check_json_precision():
    """Make sure json library being used does not lose precision converting BTC values"""
    n = Decimal("20000000.00000003")
    satoshis = int(json.loads(json.dumps(float(n))) * 1.0e8)
    if satoshis != 2000000000000003:
        raise RuntimeError("JSON encode/decode loses precision")

def count_bytes(hex_string):
    return len(bytearray.fromhex(hex_string))

def bytes_to_hex_str(byte_str):
    return hexlify(byte_str).decode('ascii')

def hash256(byte_str):
    sha256 = hashlib.sha256()
    sha256.update(byte_str)
    sha256d = hashlib.sha256()
    sha256d.update(sha256.digest())
    return sha256d.digest()[::-1]

def hex_str_to_bytes(hex_str):
    return unhexlify(hex_str.encode('ascii'))

def str_to_b64str(string):
    return b64encode(string.encode('utf-8')).decode('ascii')

def satoshi_round(amount):
    return Decimal(amount).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)

def wait_until(predicate, *, attempts=float('inf'), timeout=float('inf'), lock=None):
    if attempts == float('inf') and timeout == float('inf'):
        timeout = 60
    attempt = 0
    timeout += time.time()

    while attempt < attempts and time.time() < timeout:
        if lock:
            with lock:
                if predicate():
                    return
        else:
            if predicate():
                return
        attempt += 1
        time.sleep(0.05)

    # Print the cause of the timeout
    assert_greater_than(attempts, attempt)
    assert_greater_than(timeout, time.time())
    raise RuntimeError('Unreachable')

# RPC/P2P connection constants and functions
############################################

# The maximum number of nodes a single test can spawn
MAX_NODES = 8
# Don't assign rpc or p2p ports lower than this
PORT_MIN = 11000
# The number of ports to "reserve" for p2p and rpc, each
PORT_RANGE = 5000

class PortSeed:
    # Must be initialized with a unique integer for each process
    n = None

def get_rpc_proxy(url, node_number, timeout=None, coveragedir=None):
    """
    Args:
        url (str): URL of the RPC server to call
        node_number (int): the node number (or id) that this calls to

    Kwargs:
        timeout (int): HTTP timeout in seconds

    Returns:
        AuthServiceProxy. convenience object for making RPC calls.

    """
    proxy_kwargs = {}
    if timeout is not None:
        proxy_kwargs['timeout'] = timeout

    proxy = AuthServiceProxy(url, **proxy_kwargs)
    proxy.url = url  # store URL on proxy for info

    coverage_logfile = coverage.get_filename(
        coveragedir, node_number) if coveragedir else None

    return coverage.AuthServiceProxyWrapper(proxy, coverage_logfile)

def p2p_port(n):
    assert(n <= MAX_NODES)
    return PORT_MIN + n + (MAX_NODES * PortSeed.n) % (PORT_RANGE - 1 - MAX_NODES)

def rpc_port(n):
    return PORT_MIN + PORT_RANGE + n + (MAX_NODES * PortSeed.n) % (PORT_RANGE - 1 - MAX_NODES)

def rpc_url(datadir, i, rpchost=None):
    rpc_u, rpc_p = get_auth_cookie(datadir)
    host = '127.0.0.1'
    port = rpc_port(i)
    if rpchost:
        parts = rpchost.split(':')
        if len(parts) == 2:
            host, port = parts
        else:
            host = rpchost
    return "http://%s:%s@%s:%d" % (rpc_u, rpc_p, host, int(port))

# Node functions
################

def initialize_datadir(dirname, n):
    datadir = os.path.join(dirname, "node" + str(n))
    if not os.path.isdir(datadir):
        os.makedirs(datadir)
    with open(os.path.join(datadir, "bitcoin.conf"), 'w', encoding='utf8') as f:
        f.write("regtest=1\n")
        f.write("port=" + str(p2p_port(n)) + "\n")
        f.write("rpcport=" + str(rpc_port(n)) + "\n")
        f.write("server=1\n")
        f.write("keypool=1\n")
        f.write("discover=0\n")
        f.write("listenonion=0\n")
    return datadir

def get_datadir_path(dirname, n):
    return os.path.join(dirname, "node" + str(n))

def get_auth_cookie(datadir):
    user = None
    password = None
    if os.path.isfile(os.path.join(datadir, "bitcoin.conf")):
        with open(os.path.join(datadir, "bitcoin.conf"), 'r', encoding='utf8') as f:
            for line in f:
                if line.startswith("rpcuser="):
                    assert user is None  # Ensure that there is only one rpcuser line
                    user = line.split("=")[1].strip("\n")
                if line.startswith("rpcpassword="):
                    assert password is None  # Ensure that there is only one rpcpassword line
                    password = line.split("=")[1].strip("\n")
    if os.path.isfile(os.path.join(datadir, "regtest", ".cookie")):
        with open(os.path.join(datadir, "regtest", ".cookie"), 'r') as f:
            userpass = f.read()
            split_userpass = userpass.split(':')
            user = split_userpass[0]
            password = split_userpass[1]
    if user is None or password is None:
        raise ValueError("No RPC credentials")
    return user, password

def log_filename(dirname, n_node, logname):
    return os.path.join(dirname, "node" + str(n_node), "regtest", logname)

def get_bip9_status(node, key):
    info = node.getblockchaininfo()
    return info['bip9_softforks'][key]

def set_node_times(nodes, t):
    for node in nodes:
        node.setmocktime(t)

def disconnect_nodes(from_connection, node_num):
    for peer_id in [peer['id'] for peer in from_connection.getpeerinfo() if "testnode%d" % node_num in peer['subver']]:
        from_connection.disconnectnode(nodeid=peer_id)

    for _ in range(50):
        if [peer['id'] for peer in from_connection.getpeerinfo() if "testnode%d" % node_num in peer['subver']] == []:
            break
        time.sleep(0.1)
    else:
        raise AssertionError("timed out waiting for disconnect")

def connect_nodes(from_connection, node_num):
    ip_port = "127.0.0.1:" + str(p2p_port(node_num))
    from_connection.addnode(ip_port, "onetry")
    # poll until version handshake complete to avoid race conditions
    # with transaction relaying
    while any(peer['version'] == 0 for peer in from_connection.getpeerinfo()):
        time.sleep(0.1)

def connect_nodes_bi(nodes, a, b):
    connect_nodes(nodes[a], b)
    connect_nodes(nodes[b], a)

def sync_blocks(rpc_connections, *, wait=1, timeout=60):
    """
    Wait until everybody has the same tip.

    sync_blocks needs to be called with an rpc_connections set that has least
    one node already synced to the latest, stable tip, otherwise there's a
    chance it might return before all nodes are stably synced.
    """
    # Use getblockcount() instead of waitforblockheight() to determine the
    # initial max height because the two RPCs look at different internal global
    # variables (chainActive vs latestBlock) and the former gets updated
    # earlier.
    maxheight = max(x.getblockcount() for x in rpc_connections)
    start_time = cur_time = time.time()
    while cur_time <= start_time + timeout:
        tips = [r.waitforblockheight(maxheight, int(wait * 1000)) for r in rpc_connections]
        if all(t["height"] == maxheight for t in tips):
            if all(t["hash"] == tips[0]["hash"] for t in tips):
                return
            raise AssertionError("Block sync failed, mismatched block hashes:{}".format(
                                 "".join("\n  {!r}".format(tip) for tip in tips)))
        cur_time = time.time()
    raise AssertionError("Block sync to height {} timed out:{}".format(
                         maxheight, "".join("\n  {!r}".format(tip) for tip in tips)))

def sync_chain(rpc_connections, *, wait=1, timeout=60):
    """
    Wait until everybody has the same best block
    """
    while timeout > 0:
        best_hash = [x.getbestblockhash() for x in rpc_connections]
        if best_hash == [best_hash[0]] * len(best_hash):
            return
        time.sleep(wait)
        timeout -= wait
    raise AssertionError("Chain sync failed: Best block hashes don't match")

def sync_mempools(rpc_connections, *, wait=1, timeout=60, flush_scheduler=True):
    """
    Wait until everybody has the same transactions in their memory
    pools
    """
    while timeout > 0:
        pool = set(rpc_connections[0].getrawmempool())
        num_match = 1
        for i in range(1, len(rpc_connections)):
            if set(rpc_connections[i].getrawmempool()) == pool:
                num_match = num_match + 1
        if num_match == len(rpc_connections):
            if flush_scheduler:
                for r in rpc_connections:
                    r.syncwithvalidationinterfacequeue()
            return
        time.sleep(wait)
        timeout -= wait
    raise AssertionError("Mempool sync failed")

# Transaction/Block functions
#############################

def find_output(node, txid, amount):
    """
    Return index to output of txid with value amount
    Raises exception if there is none.
    """
    txdata = node.getrawtransaction(txid, 1)
    for i in range(len(txdata["vout"])):
        if txdata["vout"][i]["value"] == amount:
            return i
    raise RuntimeError("find_output txid %s : %s not found" % (txid, str(amount)))

def gather_inputs(from_node, amount_needed, confirmations_required=1):
    """
    Return a random set of unspent txouts that are enough to pay amount_needed
    """
    assert(confirmations_required >= 0)
    utxo = from_node.listunspent(confirmations_required)
    random.shuffle(utxo)
    inputs = []
    total_in = Decimal("0.00000000")
    while total_in < amount_needed and len(utxo) > 0:
        t = utxo.pop()
        total_in += t["amount"]
        inputs.append({"txid": t["txid"], "vout": t["vout"], "address": t["address"]})
    if total_in < amount_needed:
        raise RuntimeError("Insufficient funds: need %d, have %d" % (amount_needed, total_in))
    return (total_in, inputs)

def make_change(from_node, amount_in, amount_out, fee):
    """
    Create change output(s), return them
    """
    outputs = {}
    amount = amount_out + fee
    change = amount_in - amount
    if change > amount * 2:
        # Create an extra change output to break up big inputs
        change_address = from_node.getnewaddress()
        # Split change in two, being careful of rounding:
        outputs[change_address] = Decimal(change / 2).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
        change = amount_in - amount - outputs[change_address]
    if change > 0:
        outputs[from_node.getnewaddress()] = change
    return outputs

def random_transaction(nodes, amount, min_fee, fee_increment, fee_variants):
    """
    Create a random transaction.
    Returns (txid, hex-encoded-transaction-data, fee)
    """
    from_node = random.choice(nodes)
    to_node = random.choice(nodes)
    fee = min_fee + fee_increment * random.randint(0, fee_variants)

    (total_in, inputs) = gather_inputs(from_node, amount + fee)
    outputs = make_change(from_node, total_in, amount, fee)
    outputs[to_node.getnewaddress()] = float(amount)

    rawtx = from_node.createrawtransaction(inputs, outputs)
    signresult = from_node.signrawtransactionwithwallet(rawtx)
    txid = from_node.sendrawtransaction(signresult["hex"], True)

    return (txid, signresult["hex"], fee)

# Helper to create at least "count" utxos
# Pass in a fee that is sufficient for relay and mining new transactions.
def create_confirmed_utxos(fee, node, count):
    to_generate = int(0.5 * count) + 101
    while to_generate > 0:
        node.generate(min(25, to_generate))
        to_generate -= 25
    utxos = node.listunspent()
    iterations = count - len(utxos)
    addr1 = node.getnewaddress()
    addr2 = node.getnewaddress()
    if iterations <= 0:
        return utxos
    for i in range(iterations):
        t = utxos.pop()
        inputs = []
        inputs.append({"txid": t["txid"], "vout": t["vout"]})
        outputs = {}
        send_value = t['amount'] - fee
        outputs[addr1] = satoshi_round(send_value / 2)
        outputs[addr2] = satoshi_round(send_value / 2)
        raw_tx = node.createrawtransaction(inputs, outputs)
        signed_tx = node.signrawtransactionwithwallet(raw_tx)["hex"]
        node.sendrawtransaction(signed_tx)

    while (node.getmempoolinfo()['size'] > 0):
        node.generate(1)

    utxos = node.listunspent()
    assert(len(utxos) >= count)
    return utxos

# Create large OP_RETURN txouts that can be appended to a transaction
# to make it large (helper for constructing large transactions).
def gen_return_txouts():
    # Some pre-processing to create a bunch of OP_RETURN txouts to insert into transactions we create
    # So we have big transactions (and therefore can't fit very many into each block)
    # create one script_pubkey
    script_pubkey = "6a4d0200"  # OP_RETURN OP_PUSH2 512 bytes
    for i in range(512):
        script_pubkey = script_pubkey + "01"
    # concatenate 128 txouts of above script_pubkey which we'll insert before the txout for change
    txouts = "81"
    for k in range(128):
        # add txout value
        txouts = txouts + "0000000000000000"
        # add length of script_pubkey
        txouts = txouts + "fd0402"
        # add script_pubkey
        txouts = txouts + script_pubkey
    return txouts

def create_tx(node, coinbase, to_address, amount):
    inputs = [{"txid": coinbase, "vout": 0}]
    outputs = {to_address: amount}
    rawtx = node.createrawtransaction(inputs, outputs)
    signresult = node.signrawtransactionwithwallet(rawtx)
    assert_equal(signresult["complete"], True)
    return signresult["hex"]

# Create a spend of each passed-in utxo, splicing in "txouts" to each raw
# transaction to make it large.  See gen_return_txouts() above.
def create_lots_of_big_transactions(node, txouts, utxos, num, fee):
    addr = node.getnewaddress()
    txids = []
    for _ in range(num):
        t = utxos.pop()
        inputs = [{"txid": t["txid"], "vout": t["vout"]}]
        outputs = {}
        change = t['amount'] - fee
        outputs[addr] = satoshi_round(change)
        rawtx = node.createrawtransaction(inputs, outputs)
        newtx = rawtx[0:92]
        newtx = newtx + txouts
        newtx = newtx + rawtx[94:]
        signresult = node.signrawtransactionwithwallet(newtx, None, "NONE")
        txid = node.sendrawtransaction(signresult["hex"], True)
        txids.append(txid)
    return txids

def mine_large_block(node, utxos=None):
    # generate a 66k transaction,
    # and 14 of them is close to the 1MB block limit
    num = 14
    txouts = gen_return_txouts()
    utxos = utxos if utxos is not None else []
    if len(utxos) < num:
        utxos.clear()
        utxos.extend(node.listunspent())
    fee = 100 * node.getnetworkinfo()["relayfee"]
    create_lots_of_big_transactions(node, txouts, utxos, num, fee=fee)
    node.generate(1)