def get_address(scriptpubkey):
pubkeyhash = get_pubkeyhash(scriptpubkey)
if not pubkeyhash:
return False
pubkeyhash = binascii.hexlify(pubkeyhash).decode('utf-8')
address = script.base58_check_encode(pubkeyhash, config.ADDRESSVERSION)
# Test decoding of address.
if address != config.UNSPENDABLE and binascii.unhexlify(bytes(pubkeyhash, 'utf-8')) != script.base58_check_decode(address, config.ADDRESSVERSION):
return False
return address
def decode_checksig(asm):
pubkeyhash = script.get_checksig(asm)
chunk = arc4_decrypt(pubkeyhash)
if chunk[1:len(config.PREFIX) + 1] == config.PREFIX: # Data
# Padding byte in each output (instead of just in the last one) so that encoding methods may be mixed. Also, it’s just not very much data.
chunk_length = chunk[0]
chunk = chunk[1:chunk_length + 1]
destination, data = None, chunk[len(config.PREFIX):]
else: # Destination
pubkeyhash = binascii.hexlify(pubkeyhash).decode('utf-8')
destination, data = script.base58_check_encode(pubkeyhash, config.ADDRESSVERSION), None
return destination, data
def get_address(scriptpubkey):
pubkeyhash = get_pubkeyhash(scriptpubkey)
if not pubkeyhash:
return False
pubkeyhash = binascii.hexlify(pubkeyhash).decode('utf-8')
address = script.base58_check_encode(pubkeyhash, config.ADDRESSVERSION)
# Test decoding of address.
if address != config.UNSPENDABLE and binascii.unhexlify(
bytes(pubkeyhash, 'utf-8')) != script.base58_check_decode(
address, config.ADDRESSVERSION):
return False
return address
def decode_checksig(asm):
pubkeyhash = script.get_checksig(asm)
chunk = arc4_decrypt(pubkeyhash)
if chunk[1:len(config.PREFIX) + 1] == config.PREFIX: # Data
# Padding byte in each output (instead of just in the last one) so that encoding methods may be mixed. Also, it’s just not very much data.
chunk_length = chunk[0]
chunk = chunk[1:chunk_length + 1]
destination, data = None, chunk[len(config.PREFIX):]
else: # Destination
pubkeyhash = binascii.hexlify(pubkeyhash).decode('utf-8')
destination, data = script.base58_check_encode(
pubkeyhash, config.ADDRESSVERSION), None
return destination, data
def test_p2sh_encoding(server_db):
source = ADDR[0]
destination = ADDR[1]
with util_test.ConfigContext(
OLD_STYLE_API=True), util_test.MockProtocolChangesContext(
enhanced_sends=True, p2sh_encoding=True):
utxos = dict(((utxo['txid'], utxo['vout']), utxo)
for utxo in backend.get_unspent_txouts(source))
# pprint.pprint(utxos)
fee = 20000
fee_per_kb = 50000
result = api.compose_transaction(server_db,
'send', {
'source': source,
'destination': destination,
'asset': 'XCP',
'quantity': 100
},
encoding='p2sh',
fee_per_kb=fee_per_kb,
fee=fee)
assert not isinstance(result, list)
pretxhex = result
pretx = bitcoinlib.core.CTransaction.deserialize(
binascii.unhexlify(pretxhex))
sumvin = sum([
int(utxos[(bitcoinlib.core.b2lx(
vin.prevout.hash), vin.prevout.n)]['amount'] * 1e8)
for vin in pretx.vin
])
sumvout = sum([vout.nValue for vout in pretx.vout])
assert len(pretx.vout) == 2
assert len(pretxhex) / 2 == 142
assert sumvin == 199909140
assert sumvout < sumvin
assert sumvout == (sumvin - fee)
# data P2SH output
expected_datatx_length = 435
expected_datatx_fee = int(expected_datatx_length / 1000 * fee_per_kb)
assert repr(
pretx.vout[0].scriptPubKey
) == "CScript([OP_HASH160, x('7698101f9b9e5cdf0a0e11c2972dbc4860f374bf'), OP_EQUAL])"
assert pretx.vout[0].nValue == expected_datatx_fee
# change output
assert pretx.vout[1].nValue == sumvin - expected_datatx_fee - fee
assert pretxhex == "0100000001c1d8c075936c3495f6d653c50f73d987f75448d97a750249b1eb83bee71b24ae000000001976a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788acffffffff02f65400000000000017a9147698101f9b9e5cdf0a0e11c2972dbc4860f374bf87febbe90b000000001976a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788ac00000000"
# 01000000 | version
# 01 | inputs
# c1d8c075936c3495f6d653c50f73d987f75448d97a750249b1eb83bee71b24ae | txout hash
# 00000000 | txout index
# 19 | script length
# 76a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788ac | tx_script
# ffffffff | Sequence
# 02 | number of outputs
# f654000000000000 | output 1 value (21750)
# 17 | output 1 length (23 bytes)
# a9147698101f9b9e5cdf0a0e11c2972dbc4860f374bf87 | output 1 script
# febbe90b00000000 | output 2 value (199867390)
# 19 | output 2 length (25 bytes)
# 76a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788ac | output 2 script
# 00000000 | locktime
# first transaction should be considered BTC only
with pytest.raises(exceptions.BTCOnlyError):
blocks._get_tx_info(pretxhex)
# store transaction
pretxid, _ = util_test.insert_raw_transaction(pretxhex, server_db)
logger.debug('pretxid %s' % (pretxid))
# check that when we do another, unrelated, send that it won't use our UTXO
result = api.compose_transaction(
server_db, 'send', {
'source': source,
'destination': destination,
'asset': 'XCP',
'quantity': 100
})
othertx = bitcoinlib.core.CTransaction.deserialize(
binascii.unhexlify(result))
othertxid = bitcoinlib.core.lx(
bitcoinlib.core.b2x(othertx.vin[0].prevout.hash)) # reverse hash
assert not (binascii.hexlify(othertxid).decode('ascii') == pretxid
and othertx.vin[0].prevout.n == 0)
# now compose the data transaction
result = api.compose_transaction(
server_db,
'send',
{
'source': source,
'destination': destination,
'asset': 'XCP',
'quantity': 100
},
p2sh_pretx_txid=pretxid, # pass the pretxid
encoding='p2sh',
fee_per_kb=fee_per_kb)
assert not isinstance(result, list)
datatxhex = result
datatx = bitcoinlib.core.CTransaction.deserialize(
binascii.unhexlify(datatxhex))
sumvin = sum(
[pretx.vout[n].nValue for n, vin in enumerate(datatx.vin)])
sumvout = sum([vout.nValue for vout in datatx.vout])
fee = 10000
assert len(datatxhex) / 2 == 190
assert sumvin == expected_datatx_fee
assert sumvout < sumvin
assert sumvout == sumvin - expected_datatx_fee
assert len(datatx.vout) == 1
# opreturn signalling P2SH
assert repr(
datatx.vout[0].scriptPubKey
) == "CScript([OP_RETURN, x('8a5dda15fb6f0562da344d2f')])" # arc4(PREFIX + 'P2SH')
assert datatx.vout[0].nValue == 0
assert datatxhex == "01000000010a0746fe9308ac6e753fb85780a8b788b40655148dcde1435f2048783b784f06000000007431544553545858585800000002000000000000000100000000000000646f8d6ae8a3b381663118b4e1eff4cfc7d0954dd6ec2975210282b886c087eb37dc8182f14ba6cc3e9485ed618b95804d44aecc17c300b585b0ad007574008717a9147698101f9b9e5cdf0a0e11c2972dbc4860f374bf87ffffffff0100000000000000000e6a0c8a5dda15fb6f0562da344d2f00000000"
# 01000000 | version
# 01 | inputs
# 0a0746fe9308ac6e753fb85780a8b788b40655148dcde1435f2048783b784f06 | txout hash
# 00000000 | txout index (0)
# 74 | script length (116)
# 31544553545858585800000002000000000000000100000000000000 | tx_script
# 646f8d6ae8a3b381663118b4e1eff4cfc7d0954dd6ec2975210282b886c087eb37dc8182f14ba6cc | ...
# 3e9485ed618b95804d44aecc17c300b585b0ad007574008717a9147698101f9b9e5cdf0a0e11c297 | ...
# 2dbc4860f374bf87 | ...
# ffffffff | Sequence
# 01 | number of outputs
# 0000000000000000 | output 1 value (0)
# 0e | output 1 length (14 bytes)
# 6a0c8a5dda15fb6f0562da344d2f | output 1 script
# 00000000 | locktime
# verify parsed result
parsed_source, parsed_destination, parsed_btc_amount, parsed_fee, parsed_data, extra = blocks._get_tx_info(
datatxhex)
assert parsed_source == source
assert parsed_data == binascii.unhexlify(
"00000002"
"0000000000000001"
"0000000000000064"
"6f8d6ae8a3b381663118b4e1eff4cfc7d0954dd6ec"
) # ID=enhanced_send(0x02) ASSET=XCP(0x01) VALUE=100(0x64) destination_pubkey(0x6f8d...d6ec)
assert parsed_btc_amount == 0
assert parsed_fee == expected_datatx_fee
# check signing pubkey
tx_script_start = 8 + 2 + 64 + 8
tx_script_length = int(datatxhex[tx_script_start:tx_script_start + 2],
16) * 2
tx_script = datatxhex[tx_script_start + 2:tx_script_start + 2 +
tx_script_length]
signing_pubkey_hash = tx_script[-44:-4]
address = script.base58_check_encode(signing_pubkey_hash,
config.ADDRESSVERSION)
