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deserialize.py
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#
# Deserialize bitcoin objects from BCDataStreams
#
from BCDataStream import *
from enumeration import Enumeration
from base58 import public_key_to_bc_address, hash_160_to_bc_address
import socket
import time
from util import short_hex
def deserialize_CAddress(vds):
version = vds.read_int32()
t = vds.read_uint32()
nServices = vds.read_uint64()
vds.read_bytes(12) # pchReserved
ip = socket.inet_ntoa(vds.read_bytes(4))
port = vds.read_uint16()
return ip+":"+str(port)
def deserialize_setting(setting, vds):
if setting[0] == "f": # flag (boolean) settings
return str(vds.read_boolean())
elif setting[0:4] == "addr": # CAddress
return deserialize_CAddress(vds)
elif setting == "nTransactionFee":
return vds.read_int64()
elif setting == "nLimitProcessors":
return vds.read_int32()
return 'unknown setting'
def deserialize_TxIn(vds):
prevout_hash = vds.read_bytes(32)
prevout_n = vds.read_uint32()
scriptSig = vds.read_bytes(vds.read_compact_size())
sequence = vds.read_uint32()
if prevout_hash == "\x00"*32:
result = "TxIn: COIN GENERATED"
result += " coinbase:"+scriptSig.encode('hex_codec')
else:
result = "TxIn: prev("+short_hex(prevout_hash)+":"+str(prevout_n)+")"
pk = extract_public_key(scriptSig)
result += " pubkey: "+pk
result += " sig: "+decode_script(scriptSig)
if sequence < 0xffffffff: result += " sequence: "+hex(sequence)
return result
def deserialize_TxOut(vds):
value = vds.read_int64()
scriptPubKey = vds.read_bytes(vds.read_compact_size())
result = "TxOut: value: %.2f"%(value/1.0e8,)
pk = extract_public_key(scriptPubKey)
result += " pubkey: "+pk
result += " Script: "+decode_script(scriptPubKey)
return result
def deserialize_Transaction(vds):
version = vds.read_int32()
n_vin = vds.read_compact_size()
txIn = []
for i in xrange(n_vin):
txIn.append(deserialize_TxIn(vds))
n_vout = vds.read_compact_size()
txOut = []
for i in xrange(n_vout):
txOut.append(deserialize_TxOut(vds))
lockTime = vds.read_uint32()
result = "%d tx in, %d out\n"%(n_vin, n_vout)
result += str(txIn)+"\n"
result += str(txOut)
return result
def deserialize_MerkleTx(vds):
result = deserialize_Transaction(vds)
hashBlock = vds.read_bytes(32)
n_merkleBranch = vds.read_compact_size()
merkleBranch = vds.read_bytes(32*n_merkleBranch)
nIndex = vds.read_int32()
result = "Merkle hashBlock: "+short_hex(hashBlock)+"\n" + result
return result
def deserialize_WalletTx(vds):
result = deserialize_MerkleTx(vds)
n_vtxPrev = vds.read_compact_size()
vtxPrev = []
for i in xrange(n_vtxPrev):
vtxPrev.append(deserialize_MerkleTx(vds))
mapValue = {}
n_mapValue = vds.read_compact_size()
for i in xrange(n_mapValue):
key = vds.read_string()
value = vds.read_string()
mapValue[key] = value
n_orderForm = vds.read_compact_size()
orderForm = []
for i in xrange(n_orderForm):
first = vds.read_string()
second = vds.read_string()
orderForm.append( (first, second) )
timeReceivedIsTxTime = vds.read_uint32()
timeReceived = vds.read_uint32()
fromMe = vds.read_boolean()
spent = vds.read_boolean()
result += "\n"+" mapValue:"+str(mapValue)
result += "\n"+" orderForm:"+str(orderForm)
result += "\n"+" timeReceived:"+time.ctime(timeReceived)+" fromMe:"+str(fromMe)+" spent:"+str(spent)
return (timeReceived, result)
def deserialize_Block(vds):
version = vds.read_int32()
hashPrev = vds.read_bytes(32)
hashMerkleRoot = vds.read_bytes(32)
nTime = vds.read_uint32()
nBits = vds.read_uint32()
nNonce = vds.read_uint32()
nTransactions = vds.read_compact_size()
result = "Time: "+time.ctime(nTime)+" Nonce: "+str(nNonce)
result += "\nnBits: 0x"+hex(nBits)
result += "\nhashMerkleRoot: 0x"+hashMerkleRoot[::-1].encode('hex_codec')
result += "\nPrevious block: "+hashPrev[::-1].encode('hex_codec')
result += "\n%d transactions:\n"%(nTransactions,)
for i in range(0, nTransactions):
result += deserialize_Transaction(vds)+"\n"
return result
opcodes = Enumeration("Opcodes", [
("OP_0", 0), ("OP_PUSHDATA1",76), "OP_PUSHDATA2", "OP_PUSHDATA4", "OP_1NEGATE", "OP_RESERVED",
"OP_1", "OP_2", "OP_3", "OP_4", "OP_5", "OP_6", "OP_7",
"OP_8", "OP_9", "OP_10", "OP_11", "OP_12", "OP_13", "OP_14", "OP_15", "OP_16",
"OP_NOP", "OP_VER", "OP_IF", "OP_NOTIF", "OP_VERIF", "OP_VERNOTIF", "OP_ELSE", "OP_ENDIF", "OP_VERIFY",
"OP_RETURN", "OP_TOALTSTACK", "OP_FROMALTSTACK", "OP_2DROP", "OP_2DUP", "OP_3DUP", "OP_2OVER", "OP_2ROT", "OP_2SWAP",
"OP_IFDUP", "OP_DEPTH", "OP_DROP", "OP_DUP", "OP_NIP", "OP_OVER", "OP_PICK", "OP_ROLL", "OP_ROT",
"OP_SWAP", "OP_TUCK", "OP_CAT", "OP_SUBSTR", "OP_LEFT", "OP_RIGHT", "OP_SIZE", "OP_INVERT", "OP_AND",
"OP_OR", "OP_XOR", "OP_EQUAL", "OP_EQUALVERIFY", "OP_RESERVED1", "OP_RESERVED2", "OP_1ADD", "OP_1SUB", "OP_2MUL",
"OP_2DIV", "OP_NEGATE", "OP_ABS", "OP_NOT", "OP_0NOTEQUAL", "OP_ADD", "OP_SUB", "OP_MUL", "OP_DIV",
"OP_MOD", "OP_LSHIFT", "OP_RSHIFT", "OP_BOOLAND", "OP_BOOLOR",
"OP_NUMEQUAL", "OP_NUMEQUALVERIFY", "OP_NUMNOTEQUAL", "OP_LESSTHAN",
"OP_GREATERTHAN", "OP_LESSTHANOREQUAL", "OP_GREATERTHANOREQUAL", "OP_MIN", "OP_MAX",
"OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
"OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
"OP_CHECKMULTISIGVERIFY",
("OP_SINGLEBYTE_END", 0xF0),
("OP_DOUBLEBYTE_BEGIN", 0xF000),
"OP_PUBKEY", "OP_PUBKEYHASH",
("OP_INVALIDOPCODE", 0xFFFF),
])
def script_GetOp(bytes):
i = 0
while i < len(bytes):
vch = None
opcode = ord(bytes[i])
i += 1
if opcode >= opcodes.OP_SINGLEBYTE_END:
opcode <<= 8
opcode |= bytes[i]
i += 1
if opcode <= opcodes.OP_PUSHDATA4:
nSize = opcode
if opcode == opcodes.OP_PUSHDATA1:
nSize = ord(bytes[i])
i += 1
elif opcode == opcodes.OP_PUSHDATA2:
nSize = unpack_from('<H', bytes, i)
i += 2
elif opcode == opcodes.OP_PUSHDATA4:
nSize = unpack_from('<I', bytes, i)
i += 4
vch = bytes[i:i+nSize]
i += nSize
yield (opcode, vch)
def script_GetOpName(opcode):
return (opcodes.whatis(opcode)).replace("OP_", "")
def decode_script(bytes):
result = ''
for (opcode, vch) in script_GetOp(bytes):
if len(result) > 0: result += " "
if opcode <= opcodes.OP_PUSHDATA4:
result += "%d:"%(opcode,)
result += short_hex(vch)
else:
result += script_GetOpName(opcode)
return result
def match_decoded(decoded, to_match):
if len(decoded) != len(to_match):
return False;
for i in range(len(decoded)):
if to_match[i] == opcodes.OP_PUSHDATA4 and decoded[i][0] <= opcodes.OP_PUSHDATA4:
continue # Opcodes below OP_PUSHDATA4 all just push data onto stack, and are equivalent.
if to_match[i] != decoded[i][0]:
return False
return True
def extract_public_key(bytes):
decoded = [ x for x in script_GetOp(bytes) ]
# non-generated TxIn transactions push a signature
# (seventy-something bytes) and then their public key
# (65 bytes) onto the stack:
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
if match_decoded(decoded, match):
return public_key_to_bc_address(decoded[1][1])
# The Genesis Block, self-payments, and pay-by-IP-address payments look like:
# 65 BYTES:... CHECKSIG
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_CHECKSIG ]
if match_decoded(decoded, match):
return public_key_to_bc_address(decoded[0][1])
# Pay-by-Bitcoin-address TxOuts look like:
# DUP HASH160 20 BYTES:... EQUALVERIFY CHECKSIG
match = [ opcodes.OP_DUP, opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUALVERIFY, opcodes.OP_CHECKSIG ]
if match_decoded(decoded, match):
return hash_160_to_bc_address(decoded[2][1])
return "(None)"