744 lines
27 KiB
Python
744 lines
27 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) 2014-2016 The Bitcoin Core developers
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# Copyright (c) 2014-2017 The Dash 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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#
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# Helpful routines for regression testing
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#
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import os
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import sys
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from binascii import hexlify, unhexlify
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from base64 import b64encode
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from decimal import Decimal, ROUND_DOWN
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import json
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import http.client
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import random
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import shutil
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import subprocess
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import time
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import re
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import errno
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from . import coverage
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from .authproxy import AuthServiceProxy, JSONRPCException
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COVERAGE_DIR = None
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# The maximum number of nodes a single test can spawn
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MAX_NODES = 8
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# Don't assign rpc or p2p ports lower than this
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PORT_MIN = 11000
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# The number of ports to "reserve" for p2p and rpc, each
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PORT_RANGE = 5000
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BITCOIND_PROC_WAIT_TIMEOUT = 60
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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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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 regtest genesis time + (201 * 156)
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global MOCKTIME
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MOCKTIME = 1417713337 + (201 * 156)
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def disable_mocktime():
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global MOCKTIME
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MOCKTIME = 0
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def get_mocktime():
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return MOCKTIME
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def enable_coverage(dirname):
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"""Maintain a log of which RPC calls are made during testing."""
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global COVERAGE_DIR
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COVERAGE_DIR = dirname
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def get_rpc_proxy(url, node_number, timeout=None):
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"""
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Args:
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url (str): URL of the RPC server to call
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node_number (int): the node number (or id) that this calls to
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Kwargs:
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timeout (int): HTTP timeout in seconds
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Returns:
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AuthServiceProxy. convenience object for making RPC calls.
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"""
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proxy_kwargs = {}
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if timeout is not None:
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proxy_kwargs['timeout'] = timeout
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proxy = AuthServiceProxy(url, **proxy_kwargs)
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proxy.url = url # store URL on proxy for info
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coverage_logfile = coverage.get_filename(
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COVERAGE_DIR, node_number) if COVERAGE_DIR else None
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return coverage.AuthServiceProxyWrapper(proxy, coverage_logfile)
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def get_mnsync_status(node):
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result = node.mnsync("status")
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return result['IsSynced']
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def wait_to_sync(node):
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synced = False
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while not synced:
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synced = get_mnsync_status(node)
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time.sleep(0.5)
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def p2p_port(n):
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assert(n <= MAX_NODES)
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return PORT_MIN + n + (MAX_NODES * PortSeed.n) % (PORT_RANGE - 1 - MAX_NODES)
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def rpc_port(n):
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return PORT_MIN + PORT_RANGE + n + (MAX_NODES * PortSeed.n) % (PORT_RANGE - 1 - MAX_NODES)
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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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if satoshis != 2000000000000003:
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raise RuntimeError("JSON encode/decode loses precision")
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def count_bytes(hex_string):
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return len(bytearray.fromhex(hex_string))
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def bytes_to_hex_str(byte_str):
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return hexlify(byte_str).decode('ascii')
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def hex_str_to_bytes(hex_str):
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return unhexlify(hex_str.encode('ascii'))
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def str_to_b64str(string):
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return b64encode(string.encode('utf-8')).decode('ascii')
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def sync_blocks(rpc_connections, *, wait=1, timeout=60):
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"""
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Wait until everybody has the same tip.
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sync_blocks needs to be called with an rpc_connections set that has least
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one node already synced to the latest, stable tip, otherwise there's a
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chance it might return before all nodes are stably synced.
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"""
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# Use getblockcount() instead of waitforblockheight() to determine the
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# initial max height because the two RPCs look at different internal global
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# variables (chainActive vs latestBlock) and the former gets updated
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# earlier.
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maxheight = max(x.getblockcount() for x in rpc_connections)
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start_time = cur_time = time.time()
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while cur_time <= start_time + timeout:
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tips = [r.waitforblockheight(maxheight, int(wait * 1000)) for r in rpc_connections]
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if all(t["height"] == maxheight for t in tips):
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if all(t["hash"] == tips[0]["hash"] for t in tips):
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return
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raise AssertionError("Block sync failed, mismatched block hashes:{}".format(
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"".join("\n {!r}".format(tip) for tip in tips)))
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cur_time = time.time()
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raise AssertionError("Block sync to height {} timed out:{}".format(
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maxheight, "".join("\n {!r}".format(tip) for tip in tips)))
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def sync_chain(rpc_connections, *, wait=1, timeout=60):
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"""
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Wait until everybody has the same best block
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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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return
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time.sleep(wait)
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timeout -= wait
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raise AssertionError("Chain sync failed: Best block hashes don't match")
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def sync_mempools(rpc_connections, *, wait=1, timeout=60):
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"""
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Wait until everybody has the same transactions in their memory
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pools
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"""
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while timeout > 0:
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pool = set(rpc_connections[0].getrawmempool())
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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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if num_match == len(rpc_connections):
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return
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time.sleep(wait)
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timeout -= wait
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raise AssertionError("Mempool sync failed")
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def sync_masternodes(rpc_connections):
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for node in rpc_connections:
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wait_to_sync(node)
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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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if not os.path.isdir(datadir):
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os.makedirs(datadir)
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rpc_u, rpc_p = rpc_auth_pair(n)
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with open(os.path.join(datadir, "dash.conf"), 'w', encoding='utf8') as f:
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f.write("regtest=1\n")
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f.write("rpcuser=" + rpc_u + "\n")
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f.write("rpcpassword=" + rpc_p + "\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 rpc_auth_pair(n):
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return 'rpcuser💻' + str(n), 'rpcpass🔑' + str(n)
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def rpc_url(i, rpchost=None):
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rpc_u, rpc_p = rpc_auth_pair(i)
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host = '127.0.0.1'
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port = rpc_port(i)
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if rpchost:
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parts = rpchost.split(':')
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if len(parts) == 2:
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host, port = parts
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else:
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host = rpchost
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return "http://%s:%s@%s:%d" % (rpc_u, rpc_p, host, int(port))
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def wait_for_bitcoind_start(process, url, i):
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'''
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Wait for dashd to start. This means that RPC is accessible and fully initialized.
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Raise an exception if dashd exits during initialization.
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'''
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while True:
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if process.poll() is not None:
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raise Exception('dashd exited with status %i during initialization' % process.returncode)
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try:
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rpc = get_rpc_proxy(url, i)
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blocks = 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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time.sleep(0.25)
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def initialize_chain(test_dir, num_nodes, cachedir, extra_args=None, redirect_stderr=False):
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"""
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Create a cache of a 200-block-long chain (with wallet) for MAX_NODES
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Afterward, create num_nodes copies from the cache
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"""
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assert num_nodes <= MAX_NODES
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create_cache = False
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for i in range(MAX_NODES):
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if not os.path.isdir(os.path.join(cachedir, 'node'+str(i))):
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create_cache = True
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break
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if create_cache:
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#find and delete old cache directories if any exist
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for i in range(MAX_NODES):
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if os.path.isdir(os.path.join(cachedir,"node"+str(i))):
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shutil.rmtree(os.path.join(cachedir,"node"+str(i)))
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# Create cache directories, run dashds:
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for i in range(MAX_NODES):
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datadir=initialize_datadir(cachedir, i)
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args = [ os.getenv("DASHD", "dashd"), "-server", "-keypool=1", "-datadir="+datadir, "-discover=0" ]
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if i > 0:
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args.append("-connect=127.0.0.1:"+str(p2p_port(0)))
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if extra_args is not None:
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args += extra_args
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stderr = None
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if redirect_stderr:
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stderr = sys.stdout
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bitcoind_processes[i] = subprocess.Popen(args, stderr=stderr)
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if os.getenv("PYTHON_DEBUG", ""):
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print("initialize_chain: dashd started, waiting for RPC to come up")
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wait_for_bitcoind_start(bitcoind_processes[i], rpc_url(i), i)
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if os.getenv("PYTHON_DEBUG", ""):
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print("initialize_chain: RPC successfully started")
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rpcs = []
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for i in range(MAX_NODES):
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try:
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rpcs.append(get_rpc_proxy(rpc_url(i), i))
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except:
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sys.stderr.write("Error connecting to "+url+"\n")
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sys.exit(1)
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# Create a 200-block-long chain; each of the 4 first nodes
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# gets 25 mature blocks and 25 immature.
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# Note: To preserve compatibility with older versions of
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# initialize_chain, only 4 nodes will generate coins.
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#
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# blocks are created with timestamps 156 seconds apart
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# starting from 31356 seconds in the past
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enable_mocktime()
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block_time = get_mocktime() - (201 * 156)
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for i in range(2):
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for peer in range(4):
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for j in range(25):
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set_node_times(rpcs, block_time)
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rpcs[peer].generate(1)
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block_time += 156
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# Must sync before next peer starts generating blocks
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sync_blocks(rpcs)
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# Shut them down, and clean up cache directories:
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stop_nodes(rpcs)
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disable_mocktime()
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for i in range(MAX_NODES):
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os.remove(log_filename(cachedir, i, "debug.log"))
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os.remove(log_filename(cachedir, i, "db.log"))
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os.remove(log_filename(cachedir, i, "peers.dat"))
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os.remove(log_filename(cachedir, i, "fee_estimates.dat"))
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for i in range(num_nodes):
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from_dir = os.path.join(cachedir, "node"+str(i))
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to_dir = os.path.join(test_dir, "node"+str(i))
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shutil.copytree(from_dir, to_dir)
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initialize_datadir(test_dir, i) # Overwrite port/rpcport in dash.conf
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def initialize_chain_clean(test_dir, num_nodes):
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"""
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Create an empty blockchain and num_nodes wallets.
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Useful if a test case wants complete control over initialization.
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"""
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for i in range(num_nodes):
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datadir=initialize_datadir(test_dir, i)
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def _rpchost_to_args(rpchost):
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'''Convert optional IP:port spec to rpcconnect/rpcport args'''
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if rpchost is None:
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return []
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match = re.match('(\[[0-9a-fA-f:]+\]|[^:]+)(?::([0-9]+))?$', rpchost)
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if not match:
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raise ValueError('Invalid RPC host spec ' + rpchost)
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rpcconnect = match.group(1)
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rpcport = match.group(2)
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if rpcconnect.startswith('['): # remove IPv6 [...] wrapping
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rpcconnect = rpcconnect[1:-1]
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rv = ['-rpcconnect=' + rpcconnect]
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if rpcport:
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rv += ['-rpcport=' + rpcport]
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return rv
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def start_node(i, dirname, extra_args=None, rpchost=None, timewait=None, binary=None, redirect_stderr=False):
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"""
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Start a dashd and return RPC connection to it
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"""
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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("DASHD", "dashd")
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# RPC tests still depend on free transactions
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args = [ binary, "-datadir="+datadir, "-server", "-keypool=1", "-discover=0", "-rest", "-blockprioritysize=50000", "-mocktime="+str(get_mocktime()) ]
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# Don't try auto backups (they fail a lot when running tests)
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args += [ "-createwalletbackups=0" ]
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if extra_args is not None: args.extend(extra_args)
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# Allow to redirect stderr to stdout in case we expect some non-critical warnings/errors printed to stderr
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# Otherwise the whole test would be considered to be failed in such cases
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stderr = None
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if redirect_stderr:
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stderr = sys.stdout
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bitcoind_processes[i] = subprocess.Popen(args, stderr=stderr)
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if os.getenv("PYTHON_DEBUG", ""):
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print("start_node: dashd started, waiting for RPC to come up")
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url = rpc_url(i, rpchost)
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wait_for_bitcoind_start(bitcoind_processes[i], url, i)
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if os.getenv("PYTHON_DEBUG", ""):
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print("start_node: RPC successfully started")
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proxy = get_rpc_proxy(url, i, timeout=timewait)
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if COVERAGE_DIR:
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coverage.write_all_rpc_commands(COVERAGE_DIR, proxy)
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return proxy
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def start_nodes(num_nodes, dirname, extra_args=None, rpchost=None, timewait=None, binary=None, redirect_stderr=False):
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"""
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Start multiple dashds, return RPC connections to them
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"""
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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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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], redirect_stderr=redirect_stderr))
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except: # 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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def stop_node(node, i):
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try:
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node.stop()
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except http.client.CannotSendRequest as e:
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print("WARN: Unable to stop node: " + repr(e))
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return_code = bitcoind_processes[i].wait(timeout=BITCOIND_PROC_WAIT_TIMEOUT)
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assert_equal(return_code, 0)
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del bitcoind_processes[i]
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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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def set_node_times(nodes, t):
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for node in nodes:
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node.setmocktime(t)
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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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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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while any(peer['version'] == 0 for peer in from_connection.getpeerinfo()):
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time.sleep(0.1)
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def connect_nodes_bi(nodes, a, b):
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connect_nodes(nodes[a], b)
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connect_nodes(nodes[b], a)
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def find_output(node, txid, amount):
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"""
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Return index to output of txid with value amount
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Raises exception if there is none.
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"""
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txdata = node.getrawtransaction(txid, 1)
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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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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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utxo = from_node.listunspent(confirmations_required)
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random.shuffle(utxo)
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inputs = []
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total_in = Decimal("0.00000000")
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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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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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return (total_in, inputs)
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def make_change(from_node, amount_in, amount_out, fee):
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"""
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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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change = amount_in - amount
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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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change = amount_in - amount - outputs[change_address]
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if change > 0:
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outputs[from_node.getnewaddress()] = change
|
|
return outputs
|
|
|
|
def send_zeropri_transaction(from_node, to_node, amount, fee):
|
|
"""
|
|
Create&broadcast a zero-priority transaction.
|
|
Returns (txid, hex-encoded-txdata)
|
|
Ensures transaction is zero-priority by first creating a send-to-self,
|
|
then using its output
|
|
"""
|
|
|
|
# Create a send-to-self with confirmed inputs:
|
|
self_address = from_node.getnewaddress()
|
|
(total_in, inputs) = gather_inputs(from_node, amount+fee*2)
|
|
outputs = make_change(from_node, total_in, amount+fee, fee)
|
|
outputs[self_address] = float(amount+fee)
|
|
|
|
self_rawtx = from_node.createrawtransaction(inputs, outputs)
|
|
self_signresult = from_node.signrawtransaction(self_rawtx)
|
|
self_txid = from_node.sendrawtransaction(self_signresult["hex"], True)
|
|
|
|
vout = find_output(from_node, self_txid, amount+fee)
|
|
# Now immediately spend the output to create a 1-input, 1-output
|
|
# zero-priority transaction:
|
|
inputs = [ { "txid" : self_txid, "vout" : vout } ]
|
|
outputs = { to_node.getnewaddress() : float(amount) }
|
|
|
|
rawtx = from_node.createrawtransaction(inputs, outputs)
|
|
signresult = from_node.signrawtransaction(rawtx)
|
|
txid = from_node.sendrawtransaction(signresult["hex"], True)
|
|
|
|
return (txid, signresult["hex"])
|
|
|
|
def random_zeropri_transaction(nodes, amount, min_fee, fee_increment, fee_variants):
|
|
"""
|
|
Create a random zero-priority 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)
|
|
(txid, txhex) = send_zeropri_transaction(from_node, to_node, amount, fee)
|
|
return (txid, txhex, fee)
|
|
|
|
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.signrawtransaction(rawtx)
|
|
txid = from_node.sendrawtransaction(signresult["hex"], True)
|
|
|
|
return (txid, signresult["hex"], fee)
|
|
|
|
def assert_fee_amount(fee, tx_size, fee_per_kB):
|
|
"""Assert the fee was in range"""
|
|
target_fee = tx_size * fee_per_kB / 1000
|
|
if fee < target_fee:
|
|
raise AssertionError("Fee of %s DASH too low! (Should be %s DASH)"%(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 DASH too high! (Should be %s DASH)"%(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 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_jsonrpc(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 returned 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.
|
|
"""
|
|
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'])
|
|
except Exception as e:
|
|
raise AssertionError("Unexpected exception raised: "+type(e).__name__)
|
|
else:
|
|
raise AssertionError("No exception raised")
|
|
|
|
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 == True:
|
|
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 == True:
|
|
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)))
|
|
|
|
def satoshi_round(amount):
|
|
return Decimal(amount).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
|
|
|
|
# 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)
|
|
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.signrawtransaction(raw_tx)["hex"]
|
|
txid = 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.signrawtransaction(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.signrawtransaction(newtx, None, 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)
|
|
|
|
def get_bip9_status(node, key):
|
|
info = node.getblockchaininfo()
|
|
return info['bip9_softforks'][key]
|