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1369 lines
39 KiB
1369 lines
39 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2010 ArtForz -- public domain half-a-node |
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# Copyright (c) 2012 Jeff Garzik |
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# Copyright (c) 2010-2016 The Bitcoin 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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# |
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# mininode.py - Bitcoin P2P network half-a-node |
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# |
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# This python code was modified from ArtForz' public domain half-a-node, as |
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# found in the mini-node branch of http://github.com/jgarzik/pynode. |
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# |
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# NodeConn: an object which manages p2p connectivity to a bitcoin node |
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# NodeConnCB: a base class that describes the interface for receiving |
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# callbacks with network messages from a NodeConn |
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# CBlock, CTransaction, CBlockHeader, CTxIn, CTxOut, etc....: |
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# data structures that should map to corresponding structures in |
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# bitcoin/primitives |
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# msg_block, msg_tx, msg_headers, etc.: |
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# data structures that represent network messages |
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# ser_*, deser_*: functions that handle serialization/deserialization |
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import struct |
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import socket |
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import asyncore |
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import time |
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import sys |
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import random |
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from binascii import hexlify, unhexlify |
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from io import BytesIO |
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from codecs import encode |
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import hashlib |
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from threading import RLock |
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from threading import Thread |
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import logging |
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import copy |
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BIP0031_VERSION = 60000 |
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MY_VERSION = 60001 # past bip-31 for ping/pong |
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MY_SUBVERSION = b"/python-mininode-tester:0.0.3/" |
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MAX_INV_SZ = 50000 |
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MAX_BLOCK_SIZE = 1000000 |
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COIN = 100000000 # 1 btc in satoshis |
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# Keep our own socket map for asyncore, so that we can track disconnects |
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# ourselves (to workaround an issue with closing an asyncore socket when |
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# using select) |
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mininode_socket_map = dict() |
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# One lock for synchronizing all data access between the networking thread (see |
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# NetworkThread below) and the thread running the test logic. For simplicity, |
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# NodeConn acquires this lock whenever delivering a message to to a NodeConnCB, |
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# and whenever adding anything to the send buffer (in send_message()). This |
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# lock should be acquired in the thread running the test logic to synchronize |
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# access to any data shared with the NodeConnCB or NodeConn. |
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mininode_lock = RLock() |
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|
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# Serialization/deserialization tools |
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def sha256(s): |
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return hashlib.new('sha256', s).digest() |
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def hash256(s): |
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return sha256(sha256(s)) |
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def deser_string(f): |
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nit = struct.unpack("<B", f.read(1))[0] |
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if nit == 253: |
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nit = struct.unpack("<H", f.read(2))[0] |
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elif nit == 254: |
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nit = struct.unpack("<I", f.read(4))[0] |
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elif nit == 255: |
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nit = struct.unpack("<Q", f.read(8))[0] |
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return f.read(nit) |
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|
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def ser_string(s): |
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if len(s) < 253: |
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return struct.pack("B", len(s)) + s |
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elif len(s) < 0x10000: |
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return struct.pack("<BH", 253, len(s)) + s |
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elif len(s) < 0x100000000: |
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return struct.pack("<BI", 254, len(s)) + s |
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return struct.pack("<BQ", 255, len(s)) + s |
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|
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def deser_uint256(f): |
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r = 0 |
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for i in range(8): |
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t = struct.unpack("<I", f.read(4))[0] |
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r += t << (i * 32) |
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return r |
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def ser_uint256(u): |
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rs = b"" |
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for i in range(8): |
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rs += struct.pack("<I", u & 0xFFFFFFFF) |
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u >>= 32 |
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return rs |
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def uint256_from_str(s): |
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r = 0 |
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t = struct.unpack("<IIIIIIII", s[:32]) |
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for i in range(8): |
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r += t[i] << (i * 32) |
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return r |
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def uint256_from_compact(c): |
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nbytes = (c >> 24) & 0xFF |
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v = (c & 0xFFFFFF) << (8 * (nbytes - 3)) |
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return v |
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def deser_vector(f, c): |
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nit = struct.unpack("<B", f.read(1))[0] |
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if nit == 253: |
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nit = struct.unpack("<H", f.read(2))[0] |
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elif nit == 254: |
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nit = struct.unpack("<I", f.read(4))[0] |
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elif nit == 255: |
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nit = struct.unpack("<Q", f.read(8))[0] |
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r = [] |
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for i in range(nit): |
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t = c() |
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t.deserialize(f) |
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r.append(t) |
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return r |
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def ser_vector(l): |
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r = b"" |
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if len(l) < 253: |
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r = struct.pack("B", len(l)) |
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elif len(l) < 0x10000: |
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r = struct.pack("<BH", 253, len(l)) |
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elif len(l) < 0x100000000: |
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r = struct.pack("<BI", 254, len(l)) |
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else: |
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r = struct.pack("<BQ", 255, len(l)) |
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for i in l: |
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r += i.serialize() |
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return r |
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def deser_uint256_vector(f): |
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nit = struct.unpack("<B", f.read(1))[0] |
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if nit == 253: |
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nit = struct.unpack("<H", f.read(2))[0] |
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elif nit == 254: |
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nit = struct.unpack("<I", f.read(4))[0] |
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elif nit == 255: |
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nit = struct.unpack("<Q", f.read(8))[0] |
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r = [] |
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for i in range(nit): |
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t = deser_uint256(f) |
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r.append(t) |
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return r |
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def ser_uint256_vector(l): |
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r = b"" |
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if len(l) < 253: |
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r = struct.pack("B", len(l)) |
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elif len(l) < 0x10000: |
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r = struct.pack("<BH", 253, len(l)) |
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elif len(l) < 0x100000000: |
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r = struct.pack("<BI", 254, len(l)) |
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else: |
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r = struct.pack("<BQ", 255, len(l)) |
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for i in l: |
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r += ser_uint256(i) |
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return r |
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def deser_string_vector(f): |
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nit = struct.unpack("<B", f.read(1))[0] |
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if nit == 253: |
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nit = struct.unpack("<H", f.read(2))[0] |
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elif nit == 254: |
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nit = struct.unpack("<I", f.read(4))[0] |
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elif nit == 255: |
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nit = struct.unpack("<Q", f.read(8))[0] |
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r = [] |
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for i in range(nit): |
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t = deser_string(f) |
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r.append(t) |
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return r |
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def ser_string_vector(l): |
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r = b"" |
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if len(l) < 253: |
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r = struct.pack("B", len(l)) |
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elif len(l) < 0x10000: |
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r = struct.pack("<BH", 253, len(l)) |
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elif len(l) < 0x100000000: |
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r = struct.pack("<BI", 254, len(l)) |
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else: |
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r = struct.pack("<BQ", 255, len(l)) |
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for sv in l: |
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r += ser_string(sv) |
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return r |
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def deser_int_vector(f): |
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nit = struct.unpack("<B", f.read(1))[0] |
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if nit == 253: |
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nit = struct.unpack("<H", f.read(2))[0] |
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elif nit == 254: |
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nit = struct.unpack("<I", f.read(4))[0] |
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elif nit == 255: |
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nit = struct.unpack("<Q", f.read(8))[0] |
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r = [] |
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for i in range(nit): |
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t = struct.unpack("<i", f.read(4))[0] |
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r.append(t) |
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return r |
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def ser_int_vector(l): |
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r = b"" |
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if len(l) < 253: |
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r = struct.pack("B", len(l)) |
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elif len(l) < 0x10000: |
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r = struct.pack("<BH", 253, len(l)) |
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elif len(l) < 0x100000000: |
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r = struct.pack("<BI", 254, len(l)) |
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else: |
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r = struct.pack("<BQ", 255, len(l)) |
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for i in l: |
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r += struct.pack("<i", i) |
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return r |
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# Deserialize from a hex string representation (eg from RPC) |
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def FromHex(obj, hex_string): |
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obj.deserialize(BytesIO(unhexlify(hex_string.encode('ascii')))) |
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return obj |
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# Convert a binary-serializable object to hex (eg for submission via RPC) |
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def ToHex(obj): |
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return hexlify(obj.serialize()).decode('ascii') |
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# Objects that map to bitcoind objects, which can be serialized/deserialized |
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class CAddress(object): |
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def __init__(self): |
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self.nServices = 1 |
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self.pchReserved = b"\x00" * 10 + b"\xff" * 2 |
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self.ip = "0.0.0.0" |
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self.port = 0 |
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def deserialize(self, f): |
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self.nServices = struct.unpack("<Q", f.read(8))[0] |
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self.pchReserved = f.read(12) |
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self.ip = socket.inet_ntoa(f.read(4)) |
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self.port = struct.unpack(">H", f.read(2))[0] |
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def serialize(self): |
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r = b"" |
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r += struct.pack("<Q", self.nServices) |
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r += self.pchReserved |
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r += socket.inet_aton(self.ip) |
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r += struct.pack(">H", self.port) |
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return r |
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def __repr__(self): |
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return "CAddress(nServices=%i ip=%s port=%i)" % (self.nServices, |
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self.ip, self.port) |
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class CInv(object): |
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typemap = { |
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0: "Error", |
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1: "TX", |
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2: "Block"} |
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def __init__(self, t=0, h=0): |
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self.type = t |
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self.hash = h |
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def deserialize(self, f): |
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self.type = struct.unpack("<i", f.read(4))[0] |
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self.hash = deser_uint256(f) |
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def serialize(self): |
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r = b"" |
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r += struct.pack("<i", self.type) |
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r += ser_uint256(self.hash) |
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return r |
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def __repr__(self): |
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return "CInv(type=%s hash=%064x)" \ |
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% (self.typemap[self.type], self.hash) |
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class CBlockLocator(object): |
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def __init__(self): |
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self.nVersion = MY_VERSION |
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self.vHave = [] |
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def deserialize(self, f): |
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self.nVersion = struct.unpack("<i", f.read(4))[0] |
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self.vHave = deser_uint256_vector(f) |
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def serialize(self): |
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r = b"" |
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r += struct.pack("<i", self.nVersion) |
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r += ser_uint256_vector(self.vHave) |
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return r |
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def __repr__(self): |
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return "CBlockLocator(nVersion=%i vHave=%s)" \ |
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% (self.nVersion, repr(self.vHave)) |
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class COutPoint(object): |
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def __init__(self, hash=0, n=0): |
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self.hash = hash |
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self.n = n |
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def deserialize(self, f): |
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self.hash = deser_uint256(f) |
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self.n = struct.unpack("<I", f.read(4))[0] |
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def serialize(self): |
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r = b"" |
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r += ser_uint256(self.hash) |
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r += struct.pack("<I", self.n) |
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return r |
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def __repr__(self): |
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return "COutPoint(hash=%064x n=%i)" % (self.hash, self.n) |
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class CTxIn(object): |
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def __init__(self, outpoint=None, scriptSig=b"", nSequence=0): |
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if outpoint is None: |
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self.prevout = COutPoint() |
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else: |
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self.prevout = outpoint |
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self.scriptSig = scriptSig |
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self.nSequence = nSequence |
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def deserialize(self, f): |
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self.prevout = COutPoint() |
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self.prevout.deserialize(f) |
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self.scriptSig = deser_string(f) |
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self.nSequence = struct.unpack("<I", f.read(4))[0] |
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def serialize(self): |
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r = b"" |
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r += self.prevout.serialize() |
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r += ser_string(self.scriptSig) |
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r += struct.pack("<I", self.nSequence) |
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return r |
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def __repr__(self): |
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return "CTxIn(prevout=%s scriptSig=%s nSequence=%i)" \ |
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% (repr(self.prevout), hexlify(self.scriptSig), |
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self.nSequence) |
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class CTxOut(object): |
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def __init__(self, nValue=0, scriptPubKey=b""): |
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self.nValue = nValue |
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self.scriptPubKey = scriptPubKey |
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def deserialize(self, f): |
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self.nValue = struct.unpack("<q", f.read(8))[0] |
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self.scriptPubKey = deser_string(f) |
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def serialize(self): |
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r = b"" |
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r += struct.pack("<q", self.nValue) |
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r += ser_string(self.scriptPubKey) |
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return r |
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def __repr__(self): |
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return "CTxOut(nValue=%i.%08i scriptPubKey=%s)" \ |
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% (self.nValue // COIN, self.nValue % COIN, |
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hexlify(self.scriptPubKey)) |
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class CTransaction(object): |
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def __init__(self, tx=None): |
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if tx is None: |
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self.nVersion = 1 |
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self.vin = [] |
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self.vout = [] |
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self.nLockTime = 0 |
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self.sha256 = None |
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self.hash = None |
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else: |
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self.nVersion = tx.nVersion |
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self.vin = copy.deepcopy(tx.vin) |
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self.vout = copy.deepcopy(tx.vout) |
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self.nLockTime = tx.nLockTime |
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self.sha256 = None |
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self.hash = None |
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def deserialize(self, f): |
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self.nVersion = struct.unpack("<i", f.read(4))[0] |
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self.vin = deser_vector(f, CTxIn) |
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self.vout = deser_vector(f, CTxOut) |
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self.nLockTime = struct.unpack("<I", f.read(4))[0] |
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self.sha256 = None |
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self.hash = None |
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def serialize(self): |
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r = b"" |
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r += struct.pack("<i", self.nVersion) |
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r += ser_vector(self.vin) |
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r += ser_vector(self.vout) |
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r += struct.pack("<I", self.nLockTime) |
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return r |
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def rehash(self): |
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self.sha256 = None |
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self.calc_sha256() |
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def calc_sha256(self): |
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if self.sha256 is None: |
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self.sha256 = uint256_from_str(hash256(self.serialize())) |
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self.hash = encode(hash256(self.serialize())[::-1], 'hex_codec').decode('ascii') |
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def is_valid(self): |
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self.calc_sha256() |
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for tout in self.vout: |
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if tout.nValue < 0 or tout.nValue > 21000000 * COIN: |
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return False |
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return True |
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|
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def __repr__(self): |
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return "CTransaction(nVersion=%i vin=%s vout=%s nLockTime=%i)" \ |
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% (self.nVersion, repr(self.vin), repr(self.vout), self.nLockTime) |
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class CBlockHeader(object): |
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def __init__(self, header=None): |
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if header is None: |
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self.set_null() |
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else: |
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self.nVersion = header.nVersion |
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self.hashPrevBlock = header.hashPrevBlock |
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self.hashMerkleRoot = header.hashMerkleRoot |
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self.nTime = header.nTime |
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self.nBits = header.nBits |
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self.nNonce = header.nNonce |
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self.sha256 = header.sha256 |
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self.hash = header.hash |
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self.calc_sha256() |
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|
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def set_null(self): |
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self.nVersion = 1 |
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self.hashPrevBlock = 0 |
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self.hashMerkleRoot = 0 |
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self.nTime = 0 |
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self.nBits = 0 |
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self.nNonce = 0 |
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self.sha256 = None |
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self.hash = None |
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|
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def deserialize(self, f): |
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self.nVersion = struct.unpack("<i", f.read(4))[0] |
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self.hashPrevBlock = deser_uint256(f) |
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self.hashMerkleRoot = deser_uint256(f) |
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self.nTime = struct.unpack("<I", f.read(4))[0] |
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self.nBits = struct.unpack("<I", f.read(4))[0] |
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self.nNonce = struct.unpack("<I", f.read(4))[0] |
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self.sha256 = None |
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self.hash = None |
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|
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def serialize(self): |
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r = b"" |
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r += struct.pack("<i", self.nVersion) |
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r += ser_uint256(self.hashPrevBlock) |
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r += ser_uint256(self.hashMerkleRoot) |
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r += struct.pack("<I", self.nTime) |
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r += struct.pack("<I", self.nBits) |
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r += struct.pack("<I", self.nNonce) |
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return r |
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|
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def calc_sha256(self): |
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if self.sha256 is None: |
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r = b"" |
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r += struct.pack("<i", self.nVersion) |
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r += ser_uint256(self.hashPrevBlock) |
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r += ser_uint256(self.hashMerkleRoot) |
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r += struct.pack("<I", self.nTime) |
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r += struct.pack("<I", self.nBits) |
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r += struct.pack("<I", self.nNonce) |
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self.sha256 = uint256_from_str(hash256(r)) |
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self.hash = encode(hash256(r)[::-1], 'hex_codec').decode('ascii') |
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|
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def rehash(self): |
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self.sha256 = None |
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self.calc_sha256() |
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return self.sha256 |
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|
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def __repr__(self): |
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return "CBlockHeader(nVersion=%i hashPrevBlock=%064x hashMerkleRoot=%064x nTime=%s nBits=%08x nNonce=%08x)" \ |
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% (self.nVersion, self.hashPrevBlock, self.hashMerkleRoot, |
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time.ctime(self.nTime), self.nBits, self.nNonce) |
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|
|
|
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class CBlock(CBlockHeader): |
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def __init__(self, header=None): |
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super(CBlock, self).__init__(header) |
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self.vtx = [] |
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|
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def deserialize(self, f): |
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super(CBlock, self).deserialize(f) |
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self.vtx = deser_vector(f, CTransaction) |
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|
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def serialize(self): |
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r = b"" |
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r += super(CBlock, self).serialize() |
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r += ser_vector(self.vtx) |
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return r |
|
|
|
def calc_merkle_root(self): |
|
hashes = [] |
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for tx in self.vtx: |
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tx.calc_sha256() |
|
hashes.append(ser_uint256(tx.sha256)) |
|
while len(hashes) > 1: |
|
newhashes = [] |
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for i in range(0, len(hashes), 2): |
|
i2 = min(i+1, len(hashes)-1) |
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newhashes.append(hash256(hashes[i] + hashes[i2])) |
|
hashes = newhashes |
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return uint256_from_str(hashes[0]) |
|
|
|
def is_valid(self): |
|
self.calc_sha256() |
|
target = uint256_from_compact(self.nBits) |
|
if self.sha256 > target: |
|
return False |
|
for tx in self.vtx: |
|
if not tx.is_valid(): |
|
return False |
|
if self.calc_merkle_root() != self.hashMerkleRoot: |
|
return False |
|
return True |
|
|
|
def solve(self): |
|
self.rehash() |
|
target = uint256_from_compact(self.nBits) |
|
while self.sha256 > target: |
|
self.nNonce += 1 |
|
self.rehash() |
|
|
|
def __repr__(self): |
|
return "CBlock(nVersion=%i hashPrevBlock=%064x hashMerkleRoot=%064x nTime=%s nBits=%08x nNonce=%08x vtx=%s)" \ |
|
% (self.nVersion, self.hashPrevBlock, self.hashMerkleRoot, |
|
time.ctime(self.nTime), self.nBits, self.nNonce, repr(self.vtx)) |
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|
|
|
|
class CUnsignedAlert(object): |
|
def __init__(self): |
|
self.nVersion = 1 |
|
self.nRelayUntil = 0 |
|
self.nExpiration = 0 |
|
self.nID = 0 |
|
self.nCancel = 0 |
|
self.setCancel = [] |
|
self.nMinVer = 0 |
|
self.nMaxVer = 0 |
|
self.setSubVer = [] |
|
self.nPriority = 0 |
|
self.strComment = b"" |
|
self.strStatusBar = b"" |
|
self.strReserved = b"" |
|
|
|
def deserialize(self, f): |
|
self.nVersion = struct.unpack("<i", f.read(4))[0] |
|
self.nRelayUntil = struct.unpack("<q", f.read(8))[0] |
|
self.nExpiration = struct.unpack("<q", f.read(8))[0] |
|
self.nID = struct.unpack("<i", f.read(4))[0] |
|
self.nCancel = struct.unpack("<i", f.read(4))[0] |
|
self.setCancel = deser_int_vector(f) |
|
self.nMinVer = struct.unpack("<i", f.read(4))[0] |
|
self.nMaxVer = struct.unpack("<i", f.read(4))[0] |
|
self.setSubVer = deser_string_vector(f) |
|
self.nPriority = struct.unpack("<i", f.read(4))[0] |
|
self.strComment = deser_string(f) |
|
self.strStatusBar = deser_string(f) |
|
self.strReserved = deser_string(f) |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += struct.pack("<i", self.nVersion) |
|
r += struct.pack("<q", self.nRelayUntil) |
|
r += struct.pack("<q", self.nExpiration) |
|
r += struct.pack("<i", self.nID) |
|
r += struct.pack("<i", self.nCancel) |
|
r += ser_int_vector(self.setCancel) |
|
r += struct.pack("<i", self.nMinVer) |
|
r += struct.pack("<i", self.nMaxVer) |
|
r += ser_string_vector(self.setSubVer) |
|
r += struct.pack("<i", self.nPriority) |
|
r += ser_string(self.strComment) |
|
r += ser_string(self.strStatusBar) |
|
r += ser_string(self.strReserved) |
|
return r |
|
|
|
def __repr__(self): |
|
return "CUnsignedAlert(nVersion %d, nRelayUntil %d, nExpiration %d, nID %d, nCancel %d, nMinVer %d, nMaxVer %d, nPriority %d, strComment %s, strStatusBar %s, strReserved %s)" \ |
|
% (self.nVersion, self.nRelayUntil, self.nExpiration, self.nID, |
|
self.nCancel, self.nMinVer, self.nMaxVer, self.nPriority, |
|
self.strComment, self.strStatusBar, self.strReserved) |
|
|
|
|
|
class CAlert(object): |
|
def __init__(self): |
|
self.vchMsg = b"" |
|
self.vchSig = b"" |
|
|
|
def deserialize(self, f): |
|
self.vchMsg = deser_string(f) |
|
self.vchSig = deser_string(f) |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += ser_string(self.vchMsg) |
|
r += ser_string(self.vchSig) |
|
return r |
|
|
|
def __repr__(self): |
|
return "CAlert(vchMsg.sz %d, vchSig.sz %d)" \ |
|
% (len(self.vchMsg), len(self.vchSig)) |
|
|
|
|
|
# Objects that correspond to messages on the wire |
|
class msg_version(object): |
|
command = b"version" |
|
|
|
def __init__(self): |
|
self.nVersion = MY_VERSION |
|
self.nServices = 1 |
|
self.nTime = int(time.time()) |
|
self.addrTo = CAddress() |
|
self.addrFrom = CAddress() |
|
self.nNonce = random.getrandbits(64) |
|
self.strSubVer = MY_SUBVERSION |
|
self.nStartingHeight = -1 |
|
|
|
def deserialize(self, f): |
|
self.nVersion = struct.unpack("<i", f.read(4))[0] |
|
if self.nVersion == 10300: |
|
self.nVersion = 300 |
|
self.nServices = struct.unpack("<Q", f.read(8))[0] |
|
self.nTime = struct.unpack("<q", f.read(8))[0] |
|
self.addrTo = CAddress() |
|
self.addrTo.deserialize(f) |
|
if self.nVersion >= 106: |
|
self.addrFrom = CAddress() |
|
self.addrFrom.deserialize(f) |
|
self.nNonce = struct.unpack("<Q", f.read(8))[0] |
|
self.strSubVer = deser_string(f) |
|
if self.nVersion >= 209: |
|
self.nStartingHeight = struct.unpack("<i", f.read(4))[0] |
|
else: |
|
self.nStartingHeight = None |
|
else: |
|
self.addrFrom = None |
|
self.nNonce = None |
|
self.strSubVer = None |
|
self.nStartingHeight = None |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += struct.pack("<i", self.nVersion) |
|
r += struct.pack("<Q", self.nServices) |
|
r += struct.pack("<q", self.nTime) |
|
r += self.addrTo.serialize() |
|
r += self.addrFrom.serialize() |
|
r += struct.pack("<Q", self.nNonce) |
|
r += ser_string(self.strSubVer) |
|
r += struct.pack("<i", self.nStartingHeight) |
|
return r |
|
|
|
def __repr__(self): |
|
return 'msg_version(nVersion=%i nServices=%i nTime=%s addrTo=%s addrFrom=%s nNonce=0x%016X strSubVer=%s nStartingHeight=%i)' \ |
|
% (self.nVersion, self.nServices, time.ctime(self.nTime), |
|
repr(self.addrTo), repr(self.addrFrom), self.nNonce, |
|
self.strSubVer, self.nStartingHeight) |
|
|
|
|
|
class msg_verack(object): |
|
command = b"verack" |
|
|
|
def __init__(self): |
|
pass |
|
|
|
def deserialize(self, f): |
|
pass |
|
|
|
def serialize(self): |
|
return b"" |
|
|
|
def __repr__(self): |
|
return "msg_verack()" |
|
|
|
|
|
class msg_addr(object): |
|
command = b"addr" |
|
|
|
def __init__(self): |
|
self.addrs = [] |
|
|
|
def deserialize(self, f): |
|
self.addrs = deser_vector(f, CAddress) |
|
|
|
def serialize(self): |
|
return ser_vector(self.addrs) |
|
|
|
def __repr__(self): |
|
return "msg_addr(addrs=%s)" % (repr(self.addrs)) |
|
|
|
|
|
class msg_alert(object): |
|
command = b"alert" |
|
|
|
def __init__(self): |
|
self.alert = CAlert() |
|
|
|
def deserialize(self, f): |
|
self.alert = CAlert() |
|
self.alert.deserialize(f) |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += self.alert.serialize() |
|
return r |
|
|
|
def __repr__(self): |
|
return "msg_alert(alert=%s)" % (repr(self.alert), ) |
|
|
|
|
|
class msg_inv(object): |
|
command = b"inv" |
|
|
|
def __init__(self, inv=None): |
|
if inv is None: |
|
self.inv = [] |
|
else: |
|
self.inv = inv |
|
|
|
def deserialize(self, f): |
|
self.inv = deser_vector(f, CInv) |
|
|
|
def serialize(self): |
|
return ser_vector(self.inv) |
|
|
|
def __repr__(self): |
|
return "msg_inv(inv=%s)" % (repr(self.inv)) |
|
|
|
|
|
class msg_getdata(object): |
|
command = b"getdata" |
|
|
|
def __init__(self, inv=None): |
|
self.inv = inv if inv != None else [] |
|
|
|
def deserialize(self, f): |
|
self.inv = deser_vector(f, CInv) |
|
|
|
def serialize(self): |
|
return ser_vector(self.inv) |
|
|
|
def __repr__(self): |
|
return "msg_getdata(inv=%s)" % (repr(self.inv)) |
|
|
|
|
|
class msg_getblocks(object): |
|
command = b"getblocks" |
|
|
|
def __init__(self): |
|
self.locator = CBlockLocator() |
|
self.hashstop = 0 |
|
|
|
def deserialize(self, f): |
|
self.locator = CBlockLocator() |
|
self.locator.deserialize(f) |
|
self.hashstop = deser_uint256(f) |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += self.locator.serialize() |
|
r += ser_uint256(self.hashstop) |
|
return r |
|
|
|
def __repr__(self): |
|
return "msg_getblocks(locator=%s hashstop=%064x)" \ |
|
% (repr(self.locator), self.hashstop) |
|
|
|
|
|
class msg_tx(object): |
|
command = b"tx" |
|
|
|
def __init__(self, tx=CTransaction()): |
|
self.tx = tx |
|
|
|
def deserialize(self, f): |
|
self.tx.deserialize(f) |
|
|
|
def serialize(self): |
|
return self.tx.serialize() |
|
|
|
def __repr__(self): |
|
return "msg_tx(tx=%s)" % (repr(self.tx)) |
|
|
|
|
|
class msg_block(object): |
|
command = b"block" |
|
|
|
def __init__(self, block=None): |
|
if block is None: |
|
self.block = CBlock() |
|
else: |
|
self.block = block |
|
|
|
def deserialize(self, f): |
|
self.block.deserialize(f) |
|
|
|
def serialize(self): |
|
return self.block.serialize() |
|
|
|
def __repr__(self): |
|
return "msg_block(block=%s)" % (repr(self.block)) |
|
|
|
# for cases where a user needs tighter control over what is sent over the wire |
|
# note that the user must supply the name of the command, and the data |
|
class msg_generic(object): |
|
def __init__(self, command, data=None): |
|
self.command = command |
|
self.data = data |
|
|
|
def serialize(self): |
|
return self.data |
|
|
|
def __repr__(self): |
|
return "msg_generic()" |
|
|
|
class msg_getaddr(object): |
|
command = b"getaddr" |
|
|
|
def __init__(self): |
|
pass |
|
|
|
def deserialize(self, f): |
|
pass |
|
|
|
def serialize(self): |
|
return b"" |
|
|
|
def __repr__(self): |
|
return "msg_getaddr()" |
|
|
|
|
|
class msg_ping_prebip31(object): |
|
command = b"ping" |
|
|
|
def __init__(self): |
|
pass |
|
|
|
def deserialize(self, f): |
|
pass |
|
|
|
def serialize(self): |
|
return b"" |
|
|
|
def __repr__(self): |
|
return "msg_ping() (pre-bip31)" |
|
|
|
|
|
class msg_ping(object): |
|
command = b"ping" |
|
|
|
def __init__(self, nonce=0): |
|
self.nonce = nonce |
|
|
|
def deserialize(self, f): |
|
self.nonce = struct.unpack("<Q", f.read(8))[0] |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += struct.pack("<Q", self.nonce) |
|
return r |
|
|
|
def __repr__(self): |
|
return "msg_ping(nonce=%08x)" % self.nonce |
|
|
|
|
|
class msg_pong(object): |
|
command = b"pong" |
|
|
|
def __init__(self, nonce=0): |
|
self.nonce = nonce |
|
|
|
def deserialize(self, f): |
|
self.nonce = struct.unpack("<Q", f.read(8))[0] |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += struct.pack("<Q", self.nonce) |
|
return r |
|
|
|
def __repr__(self): |
|
return "msg_pong(nonce=%08x)" % self.nonce |
|
|
|
|
|
class msg_mempool(object): |
|
command = b"mempool" |
|
|
|
def __init__(self): |
|
pass |
|
|
|
def deserialize(self, f): |
|
pass |
|
|
|
def serialize(self): |
|
return b"" |
|
|
|
def __repr__(self): |
|
return "msg_mempool()" |
|
|
|
class msg_sendheaders(object): |
|
command = b"sendheaders" |
|
|
|
def __init__(self): |
|
pass |
|
|
|
def deserialize(self, f): |
|
pass |
|
|
|
def serialize(self): |
|
return b"" |
|
|
|
def __repr__(self): |
|
return "msg_sendheaders()" |
|
|
|
# getheaders message has |
|
# number of entries |
|
# vector of hashes |
|
# hash_stop (hash of last desired block header, 0 to get as many as possible) |
|
class msg_getheaders(object): |
|
command = b"getheaders" |
|
|
|
def __init__(self): |
|
self.locator = CBlockLocator() |
|
self.hashstop = 0 |
|
|
|
def deserialize(self, f): |
|
self.locator = CBlockLocator() |
|
self.locator.deserialize(f) |
|
self.hashstop = deser_uint256(f) |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += self.locator.serialize() |
|
r += ser_uint256(self.hashstop) |
|
return r |
|
|
|
def __repr__(self): |
|
return "msg_getheaders(locator=%s, stop=%064x)" \ |
|
% (repr(self.locator), self.hashstop) |
|
|
|
|
|
# headers message has |
|
# <count> <vector of block headers> |
|
class msg_headers(object): |
|
command = b"headers" |
|
|
|
def __init__(self): |
|
self.headers = [] |
|
|
|
def deserialize(self, f): |
|
# comment in bitcoind indicates these should be deserialized as blocks |
|
blocks = deser_vector(f, CBlock) |
|
for x in blocks: |
|
self.headers.append(CBlockHeader(x)) |
|
|
|
def serialize(self): |
|
blocks = [CBlock(x) for x in self.headers] |
|
return ser_vector(blocks) |
|
|
|
def __repr__(self): |
|
return "msg_headers(headers=%s)" % repr(self.headers) |
|
|
|
|
|
class msg_reject(object): |
|
command = b"reject" |
|
REJECT_MALFORMED = 1 |
|
|
|
def __init__(self): |
|
self.message = b"" |
|
self.code = 0 |
|
self.reason = b"" |
|
self.data = 0 |
|
|
|
def deserialize(self, f): |
|
self.message = deser_string(f) |
|
self.code = struct.unpack("<B", f.read(1))[0] |
|
self.reason = deser_string(f) |
|
if (self.code != self.REJECT_MALFORMED and |
|
(self.message == b"block" or self.message == b"tx")): |
|
self.data = deser_uint256(f) |
|
|
|
def serialize(self): |
|
r = ser_string(self.message) |
|
r += struct.pack("<B", self.code) |
|
r += ser_string(self.reason) |
|
if (self.code != self.REJECT_MALFORMED and |
|
(self.message == b"block" or self.message == b"tx")): |
|
r += ser_uint256(self.data) |
|
return r |
|
|
|
def __repr__(self): |
|
return "msg_reject: %s %d %s [%064x]" \ |
|
% (self.message, self.code, self.reason, self.data) |
|
|
|
# Helper function |
|
def wait_until(predicate, attempts=float('inf'), timeout=float('inf')): |
|
attempt = 0 |
|
elapsed = 0 |
|
|
|
while attempt < attempts and elapsed < timeout: |
|
with mininode_lock: |
|
if predicate(): |
|
return True |
|
attempt += 1 |
|
elapsed += 0.05 |
|
time.sleep(0.05) |
|
|
|
return False |
|
|
|
class msg_feefilter(object): |
|
command = b"feefilter" |
|
|
|
def __init__(self, feerate=0): |
|
self.feerate = feerate |
|
|
|
def deserialize(self, f): |
|
self.feerate = struct.unpack("<Q", f.read(8))[0] |
|
|
|
def serialize(self): |
|
r = b"" |
|
r += struct.pack("<Q", self.feerate) |
|
return r |
|
|
|
def __repr__(self): |
|
return "msg_feefilter(feerate=%08x)" % self.feerate |
|
|
|
# This is what a callback should look like for NodeConn |
|
# Reimplement the on_* functions to provide handling for events |
|
class NodeConnCB(object): |
|
def __init__(self): |
|
self.verack_received = False |
|
# deliver_sleep_time is helpful for debugging race conditions in p2p |
|
# tests; it causes message delivery to sleep for the specified time |
|
# before acquiring the global lock and delivering the next message. |
|
self.deliver_sleep_time = None |
|
|
|
def set_deliver_sleep_time(self, value): |
|
with mininode_lock: |
|
self.deliver_sleep_time = value |
|
|
|
def get_deliver_sleep_time(self): |
|
with mininode_lock: |
|
return self.deliver_sleep_time |
|
|
|
# Spin until verack message is received from the node. |
|
# Tests may want to use this as a signal that the test can begin. |
|
# This can be called from the testing thread, so it needs to acquire the |
|
# global lock. |
|
def wait_for_verack(self): |
|
while True: |
|
with mininode_lock: |
|
if self.verack_received: |
|
return |
|
time.sleep(0.05) |
|
|
|
def deliver(self, conn, message): |
|
deliver_sleep = self.get_deliver_sleep_time() |
|
if deliver_sleep is not None: |
|
time.sleep(deliver_sleep) |
|
with mininode_lock: |
|
try: |
|
getattr(self, 'on_' + message.command.decode('ascii'))(conn, message) |
|
except: |
|
print("ERROR delivering %s (%s)" % (repr(message), |
|
sys.exc_info()[0])) |
|
|
|
def on_version(self, conn, message): |
|
if message.nVersion >= 209: |
|
conn.send_message(msg_verack()) |
|
conn.ver_send = min(MY_VERSION, message.nVersion) |
|
if message.nVersion < 209: |
|
conn.ver_recv = conn.ver_send |
|
|
|
def on_verack(self, conn, message): |
|
conn.ver_recv = conn.ver_send |
|
self.verack_received = True |
|
|
|
def on_inv(self, conn, message): |
|
want = msg_getdata() |
|
for i in message.inv: |
|
if i.type != 0: |
|
want.inv.append(i) |
|
if len(want.inv): |
|
conn.send_message(want) |
|
|
|
def on_addr(self, conn, message): pass |
|
def on_alert(self, conn, message): pass |
|
def on_getdata(self, conn, message): pass |
|
def on_getblocks(self, conn, message): pass |
|
def on_tx(self, conn, message): pass |
|
def on_block(self, conn, message): pass |
|
def on_getaddr(self, conn, message): pass |
|
def on_headers(self, conn, message): pass |
|
def on_getheaders(self, conn, message): pass |
|
def on_ping(self, conn, message): |
|
if conn.ver_send > BIP0031_VERSION: |
|
conn.send_message(msg_pong(message.nonce)) |
|
def on_reject(self, conn, message): pass |
|
def on_close(self, conn): pass |
|
def on_mempool(self, conn): pass |
|
def on_pong(self, conn, message): pass |
|
def on_feefilter(self, conn, message): pass |
|
|
|
# More useful callbacks and functions for NodeConnCB's which have a single NodeConn |
|
class SingleNodeConnCB(NodeConnCB): |
|
def __init__(self): |
|
NodeConnCB.__init__(self) |
|
self.connection = None |
|
self.ping_counter = 1 |
|
self.last_pong = msg_pong() |
|
|
|
def add_connection(self, conn): |
|
self.connection = conn |
|
|
|
# Wrapper for the NodeConn's send_message function |
|
def send_message(self, message): |
|
self.connection.send_message(message) |
|
|
|
def on_pong(self, conn, message): |
|
self.last_pong = message |
|
|
|
# Sync up with the node |
|
def sync_with_ping(self, timeout=30): |
|
def received_pong(): |
|
return (self.last_pong.nonce == self.ping_counter) |
|
self.send_message(msg_ping(nonce=self.ping_counter)) |
|
success = wait_until(received_pong, timeout) |
|
self.ping_counter += 1 |
|
return success |
|
|
|
# The actual NodeConn class |
|
# This class provides an interface for a p2p connection to a specified node |
|
class NodeConn(asyncore.dispatcher): |
|
messagemap = { |
|
b"version": msg_version, |
|
b"verack": msg_verack, |
|
b"addr": msg_addr, |
|
b"alert": msg_alert, |
|
b"inv": msg_inv, |
|
b"getdata": msg_getdata, |
|
b"getblocks": msg_getblocks, |
|
b"tx": msg_tx, |
|
b"block": msg_block, |
|
b"getaddr": msg_getaddr, |
|
b"ping": msg_ping, |
|
b"pong": msg_pong, |
|
b"headers": msg_headers, |
|
b"getheaders": msg_getheaders, |
|
b"reject": msg_reject, |
|
b"mempool": msg_mempool, |
|
b"feefilter": msg_feefilter |
|
} |
|
MAGIC_BYTES = { |
|
"mainnet": b"\xf9\xbe\xb4\xd9", # mainnet |
|
"testnet3": b"\x0b\x11\x09\x07", # testnet3 |
|
"regtest": b"\xfa\xbf\xb5\xda" # regtest |
|
} |
|
|
|
def __init__(self, dstaddr, dstport, rpc, callback, net="regtest", services=1): |
|
asyncore.dispatcher.__init__(self, map=mininode_socket_map) |
|
self.log = logging.getLogger("NodeConn(%s:%d)" % (dstaddr, dstport)) |
|
self.dstaddr = dstaddr |
|
self.dstport = dstport |
|
self.create_socket(socket.AF_INET, socket.SOCK_STREAM) |
|
self.sendbuf = b"" |
|
self.recvbuf = b"" |
|
self.ver_send = 209 |
|
self.ver_recv = 209 |
|
self.last_sent = 0 |
|
self.state = "connecting" |
|
self.network = net |
|
self.cb = callback |
|
self.disconnect = False |
|
|
|
# stuff version msg into sendbuf |
|
vt = msg_version() |
|
vt.nServices = services |
|
vt.addrTo.ip = self.dstaddr |
|
vt.addrTo.port = self.dstport |
|
vt.addrFrom.ip = "0.0.0.0" |
|
vt.addrFrom.port = 0 |
|
self.send_message(vt, True) |
|
print('MiniNode: Connecting to Bitcoin Node IP # ' + dstaddr + ':' \ |
|
+ str(dstport)) |
|
|
|
try: |
|
self.connect((dstaddr, dstport)) |
|
except: |
|
self.handle_close() |
|
self.rpc = rpc |
|
|
|
def show_debug_msg(self, msg): |
|
self.log.debug(msg) |
|
|
|
def handle_connect(self): |
|
self.show_debug_msg("MiniNode: Connected & Listening: \n") |
|
self.state = "connected" |
|
|
|
def handle_close(self): |
|
self.show_debug_msg("MiniNode: Closing Connection to %s:%d... " |
|
% (self.dstaddr, self.dstport)) |
|
self.state = "closed" |
|
self.recvbuf = b"" |
|
self.sendbuf = b"" |
|
try: |
|
self.close() |
|
except: |
|
pass |
|
self.cb.on_close(self) |
|
|
|
def handle_read(self): |
|
try: |
|
t = self.recv(8192) |
|
if len(t) > 0: |
|
self.recvbuf += t |
|
self.got_data() |
|
except: |
|
pass |
|
|
|
def readable(self): |
|
return True |
|
|
|
def writable(self): |
|
with mininode_lock: |
|
length = len(self.sendbuf) |
|
return (length > 0) |
|
|
|
def handle_write(self): |
|
with mininode_lock: |
|
try: |
|
sent = self.send(self.sendbuf) |
|
except: |
|
self.handle_close() |
|
return |
|
self.sendbuf = self.sendbuf[sent:] |
|
|
|
def got_data(self): |
|
try: |
|
while True: |
|
if len(self.recvbuf) < 4: |
|
return |
|
if self.recvbuf[:4] != self.MAGIC_BYTES[self.network]: |
|
raise ValueError("got garbage %s" % repr(self.recvbuf)) |
|
if self.ver_recv < 209: |
|
if len(self.recvbuf) < 4 + 12 + 4: |
|
return |
|
command = self.recvbuf[4:4+12].split(b"\x00", 1)[0] |
|
msglen = struct.unpack("<i", self.recvbuf[4+12:4+12+4])[0] |
|
checksum = None |
|
if len(self.recvbuf) < 4 + 12 + 4 + msglen: |
|
return |
|
msg = self.recvbuf[4+12+4:4+12+4+msglen] |
|
self.recvbuf = self.recvbuf[4+12+4+msglen:] |
|
else: |
|
if len(self.recvbuf) < 4 + 12 + 4 + 4: |
|
return |
|
command = self.recvbuf[4:4+12].split(b"\x00", 1)[0] |
|
msglen = struct.unpack("<i", self.recvbuf[4+12:4+12+4])[0] |
|
checksum = self.recvbuf[4+12+4:4+12+4+4] |
|
if len(self.recvbuf) < 4 + 12 + 4 + 4 + msglen: |
|
return |
|
msg = self.recvbuf[4+12+4+4:4+12+4+4+msglen] |
|
th = sha256(msg) |
|
h = sha256(th) |
|
if checksum != h[:4]: |
|
raise ValueError("got bad checksum " + repr(self.recvbuf)) |
|
self.recvbuf = self.recvbuf[4+12+4+4+msglen:] |
|
if command in self.messagemap: |
|
f = BytesIO(msg) |
|
t = self.messagemap[command]() |
|
t.deserialize(f) |
|
self.got_message(t) |
|
else: |
|
self.show_debug_msg("Unknown command: '" + command + "' " + |
|
repr(msg)) |
|
except Exception as e: |
|
print('got_data:', repr(e)) |
|
# import traceback |
|
# traceback.print_tb(sys.exc_info()[2]) |
|
|
|
def send_message(self, message, pushbuf=False): |
|
if self.state != "connected" and not pushbuf: |
|
raise IOError('Not connected, no pushbuf') |
|
self.show_debug_msg("Send %s" % repr(message)) |
|
command = message.command |
|
data = message.serialize() |
|
tmsg = self.MAGIC_BYTES[self.network] |
|
tmsg += command |
|
tmsg += b"\x00" * (12 - len(command)) |
|
tmsg += struct.pack("<I", len(data)) |
|
if self.ver_send >= 209: |
|
th = sha256(data) |
|
h = sha256(th) |
|
tmsg += h[:4] |
|
tmsg += data |
|
with mininode_lock: |
|
self.sendbuf += tmsg |
|
self.last_sent = time.time() |
|
|
|
def got_message(self, message): |
|
if message.command == b"version": |
|
if message.nVersion <= BIP0031_VERSION: |
|
self.messagemap[b'ping'] = msg_ping_prebip31 |
|
if self.last_sent + 30 * 60 < time.time(): |
|
self.send_message(self.messagemap[b'ping']()) |
|
self.show_debug_msg("Recv %s" % repr(message)) |
|
self.cb.deliver(self, message) |
|
|
|
def disconnect_node(self): |
|
self.disconnect = True |
|
|
|
|
|
class NetworkThread(Thread): |
|
def run(self): |
|
while mininode_socket_map: |
|
# We check for whether to disconnect outside of the asyncore |
|
# loop to workaround the behavior of asyncore when using |
|
# select |
|
disconnected = [] |
|
for fd, obj in mininode_socket_map.items(): |
|
if obj.disconnect: |
|
disconnected.append(obj) |
|
[ obj.handle_close() for obj in disconnected ] |
|
asyncore.loop(0.1, use_poll=True, map=mininode_socket_map, count=1) |
|
|
|
|
|
# An exception we can raise if we detect a potential disconnect |
|
# (p2p or rpc) before the test is complete |
|
class EarlyDisconnectError(Exception): |
|
def __init__(self, value): |
|
self.value = value |
|
|
|
def __str__(self): |
|
return repr(self.value)
|
|
|