1374 lines
39 KiB
Python
Executable File
1374 lines
39 KiB
Python
Executable File
#!/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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# mininode.py - Dash 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 dash 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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# dash/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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import dash_hash
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BIP0031_VERSION = 60000
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MY_VERSION = 70208 # current MIN_PEER_PROTO_VERSION
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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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# 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 dashhash(s):
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return dash_hash.getPoWHash(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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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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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 dashd 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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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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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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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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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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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(dashhash(r))
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self.hash = encode(dashhash(r)[::-1], 'hex_codec').decode('ascii')
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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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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,
|
|
time.ctime(self.nTime), self.nBits, self.nNonce)
|
|
|
|
|
|
class CBlock(CBlockHeader):
|
|
def __init__(self, header=None):
|
|
super(CBlock, self).__init__(header)
|
|
self.vtx = []
|
|
|
|
def deserialize(self, f):
|
|
super(CBlock, self).deserialize(f)
|
|
self.vtx = deser_vector(f, CTransaction)
|
|
|
|
def serialize(self):
|
|
r = b""
|
|
r += super(CBlock, self).serialize()
|
|
r += ser_vector(self.vtx)
|
|
return r
|
|
|
|
def calc_merkle_root(self):
|
|
hashes = []
|
|
for tx in self.vtx:
|
|
tx.calc_sha256()
|
|
hashes.append(ser_uint256(tx.sha256))
|
|
while len(hashes) > 1:
|
|
newhashes = []
|
|
for i in range(0, len(hashes), 2):
|
|
i2 = min(i+1, len(hashes)-1)
|
|
newhashes.append(hash256(hashes[i] + hashes[i2]))
|
|
hashes = newhashes
|
|
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))
|
|
|
|
|
|
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 dashd 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"\xbf\x0c\x6b\xbd", # mainnet
|
|
"testnet3": b"\xce\xe2\xca\xff", # testnet3
|
|
"regtest": b"\xfc\xc1\xb7\xdc" # 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 Dash 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: '" + str(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)
|