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https://github.com/dashpay/dash.git
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[tests] fix flake8 warnings in test_framework.py and util.py
This commit is contained in:
John Newbery
parent
37065d2ed2
commit
f1fe5368f1
@ -14,6 +14,7 @@ import subprocess
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import sys
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import tempfile
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import time
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import traceback
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from .util import (
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PortSeed,
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@ -77,7 +78,7 @@ class BitcoinTestFramework(object):
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pass
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def setup_chain(self):
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self.log.info("Initializing test directory "+self.options.tmpdir)
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self.log.info("Initializing test directory " + self.options.tmpdir)
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if self.setup_clean_chain:
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self._initialize_chain_clean(self.options.tmpdir, self.num_nodes)
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else:
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@ -111,9 +112,9 @@ class BitcoinTestFramework(object):
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help="Leave bitcoinds and test.* datadir on exit or error")
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parser.add_option("--noshutdown", dest="noshutdown", default=False, action="store_true",
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help="Don't stop bitcoinds after the test execution")
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parser.add_option("--srcdir", dest="srcdir", default=os.path.normpath(os.path.dirname(os.path.realpath(__file__))+"/../../../src"),
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parser.add_option("--srcdir", dest="srcdir", default=os.path.normpath(os.path.dirname(os.path.realpath(__file__)) + "/../../../src"),
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help="Source directory containing bitcoind/bitcoin-cli (default: %default)")
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parser.add_option("--cachedir", dest="cachedir", default=os.path.normpath(os.path.dirname(os.path.realpath(__file__))+"/../../cache"),
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parser.add_option("--cachedir", dest="cachedir", default=os.path.normpath(os.path.dirname(os.path.realpath(__file__)) + "/../../cache"),
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help="Directory for caching pregenerated datadirs")
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parser.add_option("--tmpdir", dest="tmpdir", help="Root directory for datadirs")
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parser.add_option("-l", "--loglevel", dest="loglevel", default="INFO",
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@ -134,7 +135,7 @@ class BitcoinTestFramework(object):
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PortSeed.n = self.options.port_seed
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os.environ['PATH'] = self.options.srcdir+":"+self.options.srcdir+"/qt:"+os.environ['PATH']
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os.environ['PATH'] = self.options.srcdir + ":" + self.options.srcdir + "/qt:" + os.environ['PATH']
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check_json_precision()
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@ -188,7 +189,7 @@ class BitcoinTestFramework(object):
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for fn in filenames:
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try:
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with open(fn, 'r') as f:
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print("From" , fn, ":")
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print("From", fn, ":")
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print("".join(deque(f, MAX_LINES_TO_PRINT)))
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except OSError:
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print("Opening file %s failed." % fn)
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@ -257,7 +258,7 @@ class BitcoinTestFramework(object):
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ll = int(self.options.loglevel) if self.options.loglevel.isdigit() else self.options.loglevel.upper()
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ch.setLevel(ll)
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# Format logs the same as bitcoind's debug.log with microprecision (so log files can be concatenated and sorted)
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formatter = logging.Formatter(fmt = '%(asctime)s.%(msecs)03d000 %(name)s (%(levelname)s): %(message)s', datefmt='%Y-%m-%d %H:%M:%S')
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formatter = logging.Formatter(fmt='%(asctime)s.%(msecs)03d000 %(name)s (%(levelname)s): %(message)s', datefmt='%Y-%m-%d %H:%M:%S')
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formatter.converter = time.gmtime
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fh.setFormatter(formatter)
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ch.setFormatter(formatter)
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@ -354,18 +355,13 @@ class BitcoinTestFramework(object):
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for i in range(num_nodes):
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initialize_datadir(test_dir, i)
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# Test framework for doing p2p comparison testing, which sets up some bitcoind
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# binaries:
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# 1 binary: test binary
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# 2 binaries: 1 test binary, 1 ref binary
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# n>2 binaries: 1 test binary, n-1 ref binaries
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class SkipTest(Exception):
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"""This exception is raised to skip a test"""
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def __init__(self, message):
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self.message = message
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class ComparisonTestFramework(BitcoinTestFramework):
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"""Test framework for doing p2p comparison testing
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Sets up some bitcoind binaries:
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- 1 binary: test binary
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- 2 binaries: 1 test binary, 1 ref binary
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- n>2 binaries: 1 test binary, n-1 ref binaries"""
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def __init__(self):
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super().__init__()
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@ -387,4 +383,9 @@ class ComparisonTestFramework(BitcoinTestFramework):
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self.nodes = self.start_nodes(
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self.num_nodes, self.options.tmpdir, extra_args,
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binary=[self.options.testbinary] +
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[self.options.refbinary]*(self.num_nodes-1))
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[self.options.refbinary] * (self.num_nodes - 1))
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class SkipTest(Exception):
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"""This exception is raised to skip a test"""
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def __init__(self, message):
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self.message = message
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@ -4,20 +4,19 @@
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Helpful routines for regression testing."""
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import os
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from binascii import hexlify, unhexlify
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from base64 import b64encode
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from binascii import hexlify, unhexlify
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from decimal import Decimal, ROUND_DOWN
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import json
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import errno
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import http.client
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import json
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import logging
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import os
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import random
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import re
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import subprocess
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import tempfile
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import time
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import re
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import errno
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import logging
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from . import coverage
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from .authproxy import AuthServiceProxy, JSONRPCException
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@ -40,17 +39,17 @@ class PortSeed:
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# Must be initialized with a unique integer for each process
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n = None
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#Set Mocktime default to OFF.
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#MOCKTIME is only needed for scripts that use the
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#cached version of the blockchain. If the cached
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#version of the blockchain is used without MOCKTIME
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#then the mempools will not sync due to IBD.
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# Set Mocktime default to OFF.
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# MOCKTIME is only needed for scripts that use the
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# cached version of the blockchain. If the cached
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# version of the blockchain is used without MOCKTIME
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# then the mempools will not sync due to IBD.
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MOCKTIME = 0
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def enable_mocktime():
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#For backwared compatibility of the python scripts
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#with previous versions of the cache, set MOCKTIME
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#to Jan 1, 2014 + (201 * 10 * 60)
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# For backwared compatibility of the python scripts
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# with previous versions of the cache, set MOCKTIME
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# to Jan 1, 2014 + (201 * 10 * 60)
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global MOCKTIME
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MOCKTIME = 1388534400 + (201 * 10 * 60)
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@ -103,7 +102,7 @@ def rpc_port(n):
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def check_json_precision():
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"""Make sure json library being used does not lose precision converting BTC values"""
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n = Decimal("20000000.00000003")
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satoshis = int(json.loads(json.dumps(float(n)))*1.0e8)
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satoshis = int(json.loads(json.dumps(float(n))) * 1.0e8)
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if satoshis != 2000000000000003:
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raise RuntimeError("JSON encode/decode loses precision")
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@ -150,7 +149,7 @@ def sync_chain(rpc_connections, *, wait=1, timeout=60):
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"""
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while timeout > 0:
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best_hash = [x.getbestblockhash() for x in rpc_connections]
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if best_hash == [best_hash[0]]*len(best_hash):
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if best_hash == [best_hash[0]] * len(best_hash):
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return
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time.sleep(wait)
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timeout -= wait
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@ -166,7 +165,7 @@ def sync_mempools(rpc_connections, *, wait=1, timeout=60):
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num_match = 1
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for i in range(1, len(rpc_connections)):
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if set(rpc_connections[i].getrawmempool()) == pool:
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num_match = num_match+1
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num_match = num_match + 1
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if num_match == len(rpc_connections):
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return
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time.sleep(wait)
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@ -176,18 +175,18 @@ def sync_mempools(rpc_connections, *, wait=1, timeout=60):
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bitcoind_processes = {}
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def initialize_datadir(dirname, n):
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datadir = os.path.join(dirname, "node"+str(n))
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datadir = os.path.join(dirname, "node" + str(n))
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if not os.path.isdir(datadir):
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os.makedirs(datadir)
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with open(os.path.join(datadir, "bitcoin.conf"), 'w', encoding='utf8') as f:
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f.write("regtest=1\n")
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f.write("port="+str(p2p_port(n))+"\n")
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f.write("rpcport="+str(rpc_port(n))+"\n")
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f.write("port=" + str(p2p_port(n)) + "\n")
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f.write("rpcport=" + str(rpc_port(n)) + "\n")
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f.write("listenonion=0\n")
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return datadir
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def get_datadir_path(dirname, n):
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return os.path.join(dirname, "node"+str(n))
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return os.path.join(dirname, "node" + str(n))
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def get_auth_cookie(datadir, n):
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user = None
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@ -196,10 +195,10 @@ def get_auth_cookie(datadir, n):
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with open(os.path.join(datadir, "bitcoin.conf"), 'r') as f:
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for line in f:
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if line.startswith("rpcuser="):
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assert user is None # Ensure that there is only one rpcuser line
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assert user is None # Ensure that there is only one rpcuser line
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user = line.split("=")[1].strip("\n")
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if line.startswith("rpcpassword="):
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assert password is None # Ensure that there is only one rpcpassword line
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assert password is None # Ensure that there is only one rpcpassword line
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password = line.split("=")[1].strip("\n")
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if os.path.isfile(os.path.join(datadir, "regtest", ".cookie")):
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with open(os.path.join(datadir, "regtest", ".cookie"), 'r') as f:
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@ -234,15 +233,15 @@ def wait_for_bitcoind_start(process, datadir, i, rpchost=None):
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try:
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# Check if .cookie file to be created
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rpc = get_rpc_proxy(rpc_url(datadir, i, rpchost), i)
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blocks = rpc.getblockcount()
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break # break out of loop on success
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rpc.getblockcount()
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break # break out of loop on success
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except IOError as e:
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if e.errno != errno.ECONNREFUSED: # Port not yet open?
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raise # unknown IO error
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except JSONRPCException as e: # Initialization phase
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if e.error['code'] != -28: # RPC in warmup?
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raise # unknown JSON RPC exception
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except ValueError as e: # cookie file not found and no rpcuser or rpcassword. bitcoind still starting
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if e.errno != errno.ECONNREFUSED: # Port not yet open?
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raise # unknown IO error
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except JSONRPCException as e: # Initialization phase
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if e.error['code'] != -28: # RPC in warmup?
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raise # unknown JSON RPC exception
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except ValueError as e: # cookie file not found and no rpcuser or rpcassword. bitcoind still starting
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if "No RPC credentials" not in str(e):
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raise
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time.sleep(0.25)
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@ -255,11 +254,12 @@ def _start_node(i, dirname, extra_args=None, rpchost=None, timewait=None, binary
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This function should only be called from within test_framework, not by individual test scripts."""
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datadir = os.path.join(dirname, "node"+str(i))
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datadir = os.path.join(dirname, "node" + str(i))
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if binary is None:
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binary = os.getenv("BITCOIND", "bitcoind")
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args = [binary, "-datadir=" + datadir, "-server", "-keypool=1", "-discover=0", "-rest", "-logtimemicros", "-debug", "-debugexclude=libevent", "-debugexclude=leveldb", "-mocktime=" + str(get_mocktime()), "-uacomment=testnode%d" % i]
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if extra_args is not None: args.extend(extra_args)
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if extra_args is not None:
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args.extend(extra_args)
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bitcoind_processes[i] = subprocess.Popen(args, stderr=stderr)
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logger.debug("initialize_chain: bitcoind started, waiting for RPC to come up")
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wait_for_bitcoind_start(bitcoind_processes[i], datadir, i, rpchost)
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@ -277,7 +277,7 @@ def assert_start_raises_init_error(i, dirname, extra_args=None, expected_msg=Non
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node = _start_node(i, dirname, extra_args, stderr=log_stderr)
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_stop_node(node, i)
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except Exception as e:
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assert 'bitcoind exited' in str(e) #node must have shutdown
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assert 'bitcoind exited' in str(e) # node must have shutdown
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if expected_msg is not None:
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log_stderr.seek(0)
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stderr = log_stderr.read().decode('utf-8')
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@ -295,21 +295,24 @@ def _start_nodes(num_nodes, dirname, extra_args=None, rpchost=None, timewait=Non
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This function should only be called from within test_framework, not by individual test scripts."""
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if extra_args is None: extra_args = [ None for _ in range(num_nodes) ]
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if binary is None: binary = [ None for _ in range(num_nodes) ]
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if extra_args is None:
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extra_args = [None] * num_nodes
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if binary is None:
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binary = [None] * num_nodes
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assert_equal(len(extra_args), num_nodes)
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assert_equal(len(binary), num_nodes)
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rpcs = []
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try:
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for i in range(num_nodes):
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rpcs.append(_start_node(i, dirname, extra_args[i], rpchost, timewait=timewait, binary=binary[i]))
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except: # If one node failed to start, stop the others
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except:
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# If one node failed to start, stop the others
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_stop_nodes(rpcs)
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raise
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return rpcs
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def log_filename(dirname, n_node, logname):
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return os.path.join(dirname, "node"+str(n_node), "regtest", logname)
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return os.path.join(dirname, "node" + str(n_node), "regtest", logname)
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def _stop_node(node, i):
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"""Stop a bitcoind test node
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@ -332,7 +335,7 @@ def _stop_nodes(nodes):
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for i, node in enumerate(nodes):
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_stop_node(node, i)
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assert not bitcoind_processes.values() # All connections must be gone now
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assert not bitcoind_processes.values() # All connections must be gone now
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def set_node_times(nodes, t):
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for node in nodes:
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@ -350,7 +353,7 @@ def disconnect_nodes(from_connection, node_num):
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raise AssertionError("timed out waiting for disconnect")
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def connect_nodes(from_connection, node_num):
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ip_port = "127.0.0.1:"+str(p2p_port(node_num))
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ip_port = "127.0.0.1:" + str(p2p_port(node_num))
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from_connection.addnode(ip_port, "onetry")
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# poll until version handshake complete to avoid race conditions
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# with transaction relaying
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@ -370,14 +373,13 @@ def find_output(node, txid, amount):
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for i in range(len(txdata["vout"])):
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if txdata["vout"][i]["value"] == amount:
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return i
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raise RuntimeError("find_output txid %s : %s not found"%(txid,str(amount)))
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raise RuntimeError("find_output txid %s : %s not found" % (txid, str(amount)))
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def gather_inputs(from_node, amount_needed, confirmations_required=1):
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"""
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Return a random set of unspent txouts that are enough to pay amount_needed
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"""
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assert(confirmations_required >=0)
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assert(confirmations_required >= 0)
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utxo = from_node.listunspent(confirmations_required)
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random.shuffle(utxo)
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inputs = []
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@ -385,9 +387,9 @@ def gather_inputs(from_node, amount_needed, confirmations_required=1):
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while total_in < amount_needed and len(utxo) > 0:
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t = utxo.pop()
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total_in += t["amount"]
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inputs.append({ "txid" : t["txid"], "vout" : t["vout"], "address" : t["address"] } )
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inputs.append({"txid": t["txid"], "vout": t["vout"], "address": t["address"]})
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if total_in < amount_needed:
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raise RuntimeError("Insufficient funds: need %d, have %d"%(amount_needed, total_in))
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raise RuntimeError("Insufficient funds: need %d, have %d" % (amount_needed, total_in))
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return (total_in, inputs)
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def make_change(from_node, amount_in, amount_out, fee):
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@ -395,13 +397,13 @@ def make_change(from_node, amount_in, amount_out, fee):
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Create change output(s), return them
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"""
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outputs = {}
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amount = amount_out+fee
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amount = amount_out + fee
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change = amount_in - amount
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if change > amount*2:
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if change > amount * 2:
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# Create an extra change output to break up big inputs
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change_address = from_node.getnewaddress()
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# Split change in two, being careful of rounding:
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outputs[change_address] = Decimal(change/2).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
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outputs[change_address] = Decimal(change / 2).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
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change = amount_in - amount - outputs[change_address]
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if change > 0:
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outputs[from_node.getnewaddress()] = change
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@ -414,9 +416,9 @@ def random_transaction(nodes, amount, min_fee, fee_increment, fee_variants):
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"""
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from_node = random.choice(nodes)
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to_node = random.choice(nodes)
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fee = min_fee + fee_increment*random.randint(0,fee_variants)
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fee = min_fee + fee_increment * random.randint(0, fee_variants)
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(total_in, inputs) = gather_inputs(from_node, amount+fee)
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(total_in, inputs) = gather_inputs(from_node, amount + fee)
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outputs = make_change(from_node, total_in, amount, fee)
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outputs[to_node.getnewaddress()] = float(amount)
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@ -430,10 +432,10 @@ def assert_fee_amount(fee, tx_size, fee_per_kB):
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"""Assert the fee was in range"""
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target_fee = tx_size * fee_per_kB / 1000
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if fee < target_fee:
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raise AssertionError("Fee of %s BTC too low! (Should be %s BTC)"%(str(fee), str(target_fee)))
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raise AssertionError("Fee of %s BTC too low! (Should be %s BTC)" % (str(fee), str(target_fee)))
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# allow the wallet's estimation to be at most 2 bytes off
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if fee > (tx_size + 2) * fee_per_kB / 1000:
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raise AssertionError("Fee of %s BTC too high! (Should be %s BTC)"%(str(fee), str(target_fee)))
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raise AssertionError("Fee of %s BTC too high! (Should be %s BTC)" % (str(fee), str(target_fee)))
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def assert_equal(thing1, thing2, *args):
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if thing1 != thing2 or any(thing1 != arg for arg in args):
|
||||
@ -441,11 +443,11 @@ def assert_equal(thing1, thing2, *args):
|
||||
|
||||
def assert_greater_than(thing1, thing2):
|
||||
if thing1 <= thing2:
|
||||
raise AssertionError("%s <= %s"%(str(thing1),str(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)))
|
||||
raise AssertionError("%s < %s" % (str(thing1), str(thing2)))
|
||||
|
||||
def assert_raises(exc, fun, *args, **kwds):
|
||||
assert_raises_message(exc, None, fun, *args, **kwds)
|
||||
@ -455,9 +457,9 @@ def assert_raises_message(exc, message, fun, *args, **kwds):
|
||||
fun(*args, **kwds)
|
||||
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'])
|
||||
raise AssertionError("Expected substring not found:" + e.error['message'])
|
||||
except Exception as e:
|
||||
raise AssertionError("Unexpected exception raised: "+type(e).__name__)
|
||||
raise AssertionError("Unexpected exception raised: " + type(e).__name__)
|
||||
else:
|
||||
raise AssertionError("No exception raised")
|
||||
|
||||
@ -484,9 +486,9 @@ def assert_raises_jsonrpc(code, message, fun, *args, **kwds):
|
||||
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'])
|
||||
raise AssertionError("Expected substring not found:" + e.error['message'])
|
||||
except Exception as e:
|
||||
raise AssertionError("Unexpected exception raised: "+type(e).__name__)
|
||||
raise AssertionError("Unexpected exception raised: " + type(e).__name__)
|
||||
else:
|
||||
raise AssertionError("No exception raised")
|
||||
|
||||
@ -507,7 +509,7 @@ def assert_is_hash_string(string, length=64):
|
||||
raise AssertionError(
|
||||
"String %r contains invalid characters for a hash." % string)
|
||||
|
||||
def assert_array_result(object_array, to_match, expected, should_not_find = False):
|
||||
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
|
||||
@ -515,26 +517,26 @@ def assert_array_result(object_array, to_match, expected, should_not_find = Fals
|
||||
If the should_not_find flag is true, to_match should not be found
|
||||
in object_array
|
||||
"""
|
||||
if should_not_find == True:
|
||||
assert_equal(expected, { })
|
||||
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():
|
||||
for key, value in to_match.items():
|
||||
if item[key] != value:
|
||||
all_match = False
|
||||
if not all_match:
|
||||
continue
|
||||
elif should_not_find == True:
|
||||
num_matched = num_matched+1
|
||||
for key,value in expected.items():
|
||||
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 should_not_find != True:
|
||||
raise AssertionError("No objects matched %s"%(str(to_match)))
|
||||
if num_matched > 0 and should_not_find == True:
|
||||
raise AssertionError("Objects were found %s"%(str(to_match)))
|
||||
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)))
|
||||
|
||||
def satoshi_round(amount):
|
||||
return Decimal(amount).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
|
||||
@ -542,7 +544,7 @@ def satoshi_round(amount):
|
||||
# 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):
|
||||
node.generate(int(0.5*count)+101)
|
||||
node.generate(int(0.5 * count) + 101)
|
||||
utxos = node.listunspent()
|
||||
iterations = count - len(utxos)
|
||||
addr1 = node.getnewaddress()
|
||||
@ -552,14 +554,14 @@ def create_confirmed_utxos(fee, node, count):
|
||||
for i in range(iterations):
|
||||
t = utxos.pop()
|
||||
inputs = []
|
||||
inputs.append({ "txid" : t["txid"], "vout" : t["vout"]})
|
||||
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)
|
||||
outputs[addr1] = satoshi_round(send_value / 2)
|
||||
outputs[addr2] = satoshi_round(send_value / 2)
|
||||
raw_tx = node.createrawtransaction(inputs, outputs)
|
||||
signed_tx = node.signrawtransaction(raw_tx)["hex"]
|
||||
txid = node.sendrawtransaction(signed_tx)
|
||||
node.sendrawtransaction(signed_tx)
|
||||
|
||||
while (node.getmempoolinfo()['size'] > 0):
|
||||
node.generate(1)
|
||||
@ -574,8 +576,8 @@ 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 = "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"
|
||||
@ -589,8 +591,8 @@ def gen_return_txouts():
|
||||
return txouts
|
||||
|
||||
def create_tx(node, coinbase, to_address, amount):
|
||||
inputs = [{ "txid" : coinbase, "vout" : 0}]
|
||||
outputs = { to_address : amount }
|
||||
inputs = [{"txid": coinbase, "vout": 0}]
|
||||
outputs = {to_address: amount}
|
||||
rawtx = node.createrawtransaction(inputs, outputs)
|
||||
signresult = node.signrawtransaction(rawtx)
|
||||
assert_equal(signresult["complete"], True)
|
||||
@ -603,7 +605,7 @@ def create_lots_of_big_transactions(node, txouts, utxos, num, fee):
|
||||
txids = []
|
||||
for _ in range(num):
|
||||
t = utxos.pop()
|
||||
inputs=[{ "txid" : t["txid"], "vout" : t["vout"]}]
|
||||
inputs = [{"txid": t["txid"], "vout": t["vout"]}]
|
||||
outputs = {}
|
||||
change = t['amount'] - fee
|
||||
outputs[addr] = satoshi_round(change)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user