def __init__(self, version, input_count, txIn_list, output_count,
txOut_list, timelock):
self.version = version
self.input_count = convert_hex(reverse_bytes(input_count))
self.inputs = txIn_list
self.output_count = convert_hex(reverse_bytes(output_count))
self.outputs = txOut_list
self.timelock = convert_hex(reverse_bytes(timelock))
def __init__(self, version, prev_block_hash, merkle_root_hash, timestamp,
dif_bits, nonce, tx_counter):
self.version = reverse_bytes(version)
self.prev_block_hash = reverse_bytes(prev_block_hash)
self.merkle_root_hash = reverse_bytes(merkle_root_hash)
self.timestamp = convert_unix(convert_hex(reverse_bytes(timestamp)))
self.dif_bits = convert_hex(reverse_bytes(dif_bits))
self.nonce = convert_hex(reverse_bytes(nonce))
self.tx_counter = tx_counter
def parse_txOuts(num_txOuts, hex_data):
txOut_bytes = [8, 1, -1]
txOuts = []
start_pos = 0
for i in range(num_txOuts):
txOut_fields = []
for j in range(len(txOut_bytes)):
txOut_fields.append(hex_data[start_pos:start_pos +
txOut_bytes[j] * 2])
start_pos = start_pos + txOut_bytes[j] * 2
if j == 1:
txOut_bytes[j + 1] = convert_hex(txOut_fields[j])
value, script_length, output_script = txOut_fields
value = convert_hex(reverse_bytes(value)) / 100000000
txOuts.append(TxOut(value, script_length, output_script))
return txOuts, start_pos
def parse_output(output):
before_ops = []
output_script, pubkey_hash, op_dup = [-1, -1, False]
try:
num_bytes = len(output) / 2
for i in range(int(num_bytes)):
before_ops.append(IO_Parser.opcodes[output[2 * i:2 * (i + 1)]])
except:
pos = 2 * i
pubkey_hash_len = convert_hex(output[pos:pos + 2])
pubkey_hash = output[pos + 2:pos + 2 + 2 * pubkey_hash_len]
pos = int((pos + 2 + 2 * pubkey_hash_len) / 2)
after_ops = []
for i in range(pos, int(num_bytes)):
after_ops.append(IO_Parser.opcodes[output[2 * i:2 * (i + 1)]])
if 'OP_DUP' in before_ops:
op_dup = True
output_script = '\n'
for i in range(len(before_ops)):
output_script = output_script + before_ops[i] + '\n'
output_script = output_script + pubkey_hash + '\n'
for i in range(len(after_ops)):
output_script = output_script + after_ops[i] + '\n'
return output_script, pubkey_hash, op_dup
def parse_transactions_for_indexed_output(hex_data, index):
transaction_bytes = [4, 1, -1, 1, -2, 4]
fields = [
'version', 'input count', 'txIns', 'output count', 'txOuts',
'timelock'
]
start_pos = 0
field_vals = dict()
for i in range(len(fields)):
if fields[i] is 'input count' or fields[i] is 'output count':
field_vals[fields[i]] = hex_data[start_pos:start_pos +
transaction_bytes[i] * 2]
start_pos = start_pos + transaction_bytes[i] * 2
if convert_hex(field_vals[fields[i]]) == 253:
field_vals[fields[i]] = reverse_bytes(
hex_data[start_pos:start_pos + 4])
start_pos = start_pos + 4
elif convert_hex(field_vals[fields[i]]) == 254:
field_vals[fields[i]] = reverse_bytes(
hex_data[start_pos:start_pos + 8])
start_pos = start_pos + 8
elif convert_hex(field_vals[fields[i]]) == 255:
field_vals[fields[i]] = reverse_bytes(
hex_data[start_pos:start_pos + 16])
start_pos = start_pos + 16
elif fields[i] is 'txIns':
txIns, offset = TransactionParser.parse_txIns_dummy(
convert_hex(field_vals['input count']),
hex_data[start_pos:])
field_vals[fields[i]] = txIns
start_pos = start_pos + offset
elif fields[i] is 'txOuts':
txOuts, offset = TransactionParser.parse_txOuts(
convert_hex(field_vals['output count']),
hex_data[start_pos:])
field_vals[fields[i]] = txOuts
# print(txOuts)
start_pos = start_pos + offset
else:
field_vals[fields[i]] = hex_data[start_pos:start_pos +
transaction_bytes[i] * 2]
start_pos = start_pos + transaction_bytes[i] * 2
return txOuts[int(index)].value
def get_TxIn_value(hash_, index):
index = convert_hex((reverse_bytes(index)))
hash_ = reverse_bytes(hash_)
url = 'https://blockchain.info/rawtx/' + hash_ + '?format=hex'
html = urlopen(url)
soup = BeautifulSoup(html, 'lxml')
raw_hex = soup.get_text()
return TransactionParser.parse_transactions_for_indexed_output(
raw_hex, index)
def __init__(self, prev_txid, index, script_length, input_script, sequence,
value):
self.previous_txid_hash = reverse_bytes(prev_txid)
self.index_of_prev_txid_hash = convert_hex(reverse_bytes(index))
self.script_length = script_length
self.input_script = input_script
self.sequence = sequence
self.value = value
self.signature = None
self.pubkey = None
self.address = None
if self.value != -1: # if not coinbase tx
self.get_script_info()
def parse_txIns_dummy(num_txIns, hex_data):
txIn_bytes = [32, 4, 1, -1, 4]
txIns = []
start_pos = 0
for i in range(num_txIns):
txIn_fields = []
for j in range(len(txIn_bytes)):
txIn_fields.append(hex_data[start_pos:start_pos +
txIn_bytes[j] * 2])
start_pos = start_pos + txIn_bytes[j] * 2
if j == 2:
txIn_bytes[j + 1] = convert_hex(txIn_fields[j])
prev_txid, index, script_length, input_script, sequence = txIn_fields
txIns.append(
TxIn(prev_txid, index, script_length, input_script, sequence,
0))
return txIns, start_pos
def parse_txIns(num_txIns, hex_data):
txIn_bytes = [32, 4, 1, -1, 4]
txIns = []
start_pos = 0
for i in range(num_txIns):
txIn_fields = []
for j in range(len(txIn_bytes)):
txIn_fields.append(hex_data[start_pos:start_pos +
txIn_bytes[j] * 2])
start_pos = start_pos + txIn_bytes[j] * 2
if j == 2:
txIn_bytes[j + 1] = convert_hex(txIn_fields[j])
prev_txid, index, script_length, input_script, sequence = txIn_fields
if prev_txid == '0000000000000000000000000000000000000000000000000000000000000000': # coinbase
txIns.append(
TxIn(prev_txid, index, script_length, input_script,
sequence, -1)) # -1 put in for value in coinbase
else:
value = TransactionParser.get_TxIn_value(prev_txid, index)
txIns.append(
TxIn(prev_txid, index, script_length, input_script,
sequence, value))
return txIns, start_pos
def parse_input(input):
sig_len = convert_hex(input[0:2])
sig = input[2:2 + sig_len * 2]
pubkey_len = convert_hex(input[2 + sig_len * 2:2 + sig_len * 2 + 2])
pubkey = input[sig_len * 2 + 4:]
return sig, pubkey
