def get_unspent_txouts(address, return_confirmed=False):
result = backend.get_unspent_txouts(
address, return_confirmed=return_confirmed)
if return_confirmed:
return {'all': result[0], 'confirmed': result[1]}
else:
return result
def test_estimate_fee_per_kb(fee_per_kb, fee_per_kb_used, server_db, monkeypatch):
def _fee_per_kb(nblocks):
return fee_per_kb
monkeypatch.setattr('counterpartylib.lib.backend.fee_per_kb', _fee_per_kb)
utxos = dict(((utxo['txid'], utxo['vout']), utxo) for utxo in backend.get_unspent_txouts(ADDR[0]))
with util_test.ConfigContext(ESTIMATE_FEE_PER_KB=True):
txhex = api.compose_transaction(
server_db, 'send',
{'source': ADDR[0],
'destination': ADDR[1],
'asset': 'XCP',
'quantity': 100},
)
pretx = bitcoinlib.core.CTransaction.deserialize(binascii.unhexlify(txhex))
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])
unsignedsize = 183
signedsize = 315
fee = int((signedsize / 1000) * (fee_per_kb_used or fee_per_kb))
assert len(txhex) / 2 == unsignedsize
assert sumvin == 199909140
assert sumvout < sumvin
assert sumvout == sumvin - fee
def get_unspent_txouts(address,
unconfirmed=False,
unspent_tx_hash=None):
return backend.get_unspent_txouts(address,
unconfirmed=unconfirmed,
multisig_inputs=False,
unspent_tx_hash=unspent_tx_hash)
def test_estimate_fee_per_kb(fee_per_kb, fee_per_kb_used, server_db, monkeypatch):
def _fee_per_kb(conf_target, mode):
return fee_per_kb
monkeypatch.setattr('counterpartylib.lib.backend.fee_per_kb', _fee_per_kb)
utxos = dict(((utxo['txid'], utxo['vout']), utxo) for utxo in backend.get_unspent_txouts(ADDR[0]))
with util_test.ConfigContext(ESTIMATE_FEE_PER_KB=True):
txhex = api.compose_transaction(
server_db, 'send',
{'source': ADDR[0],
'destination': ADDR[1],
'asset': 'XCP',
'quantity': 100},
)
pretx = bitcoinlib.core.CTransaction.deserialize(binascii.unhexlify(txhex))
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])
unsignedsize = 183
signedsize = 263
fee = int((signedsize / 1000) * (fee_per_kb_used or fee_per_kb))
assert len(txhex) / 2 == unsignedsize
assert sumvin == 199909140
assert sumvout < sumvin
assert sumvout == sumvin - fee
def get_unspent_txouts(address, unconfirmed=False, unspent_tx_hash=None, order_by=None):
results = backend.get_unspent_txouts(address, unconfirmed=unconfirmed, unspent_tx_hash=unspent_tx_hash)
if order_by is None:
return results
else:
order_key = order_by
reverse = False
if order_key.startswith('-'):
order_key = order_key[1:]
reverse = True
return sorted(results, key=lambda x: x[order_key], reverse=reverse)
def select_any_coin_from_source(source,
allow_unconfirmed_inputs=True,
disable_utxo_locks=False):
''' Get the first (biggest) input from the source address '''
global UTXO_LOCKS
# Array of UTXOs, as retrieved by listunspent function from bitcoind
unspent = backend.get_unspent_txouts(source,
unconfirmed=allow_unconfirmed_inputs)
filter_unspents_utxo_locks = []
if UTXO_LOCKS is not None and source in UTXO_LOCKS:
filter_unspents_utxo_locks = UTXO_LOCKS[source].keys()
# filter out any locked UTXOs to prevent creating transactions that spend the same UTXO when they're created at the same time
filtered_unspent = []
for output in unspent:
if make_outkey(output) not in filter_unspents_utxo_locks:
filtered_unspent.append(output)
unspent = filtered_unspent
# sort
unspent = backend.sort_unspent_txouts(unspent)
# use the first input
input = unspent[0]
if input is None:
return None
# Lock the source's inputs (UTXOs) chosen for this transaction
if UTXO_LOCKS is not None and not disable_utxo_locks:
if source not in UTXO_LOCKS:
UTXO_LOCKS[source] = cachetools.TTLCache(
UTXO_LOCKS_PER_ADDRESS_MAXSIZE, config.UTXO_LOCKS_MAX_AGE)
UTXO_LOCKS[source][make_outkey(input)] = input
return input
def construct (db, tx_info, encoding='auto',
fee_per_kb=config.DEFAULT_FEE_PER_KB,
estimate_fee_per_kb=None, estimate_fee_per_kb_nblocks=config.ESTIMATE_FEE_NBLOCKS,
regular_dust_size=config.DEFAULT_REGULAR_DUST_SIZE,
multisig_dust_size=config.DEFAULT_MULTISIG_DUST_SIZE,
op_return_value=config.DEFAULT_OP_RETURN_VALUE,
exact_fee=None, fee_provided=0, provided_pubkeys=None, dust_return_pubkey=None,
allow_unconfirmed_inputs=False, unspent_tx_hash=None, custom_inputs=None, disable_utxo_locks=False):
if estimate_fee_per_kb is None:
estimate_fee_per_kb = config.ESTIMATE_FEE_PER_KB
global UTXO_LOCKS
desired_encoding = encoding
(source, destination_outputs, data) = tx_info
if dust_return_pubkey:
dust_return_pubkey = binascii.unhexlify(dust_return_pubkey)
# Source.
# If public key is necessary for construction of (unsigned)
# transaction, use the public key provided, or find it from the
# blockchain.
if source:
script.validate(source)
source_is_p2sh = script.is_p2sh(source)
# Sanity checks.
if exact_fee and not isinstance(exact_fee, int):
raise exceptions.TransactionError('Exact fees must be in satoshis.')
if not isinstance(fee_provided, int):
raise exceptions.TransactionError('Fee provided must be in satoshis.')
if UTXO_LOCKS is None and config.UTXO_LOCKS_MAX_ADDRESSES > 0: # initialize if configured
UTXO_LOCKS = util.DictCache(size=config.UTXO_LOCKS_MAX_ADDRESSES)
'''Destinations'''
# Destination outputs.
# Replace multi‐sig addresses with multi‐sig pubkeys. Check that the
# destination output isn’t a dust output. Set null values to dust size.
destination_outputs_new = []
for (address, value) in destination_outputs:
# Value.
if script.is_multisig(address):
dust_size = multisig_dust_size
else:
dust_size = regular_dust_size
if value == None:
value = dust_size
elif value < dust_size:
raise exceptions.TransactionError('Destination output is dust.')
# Address.
script.validate(address)
if script.is_multisig(address):
destination_outputs_new.append((backend.multisig_pubkeyhashes_to_pubkeys(address, provided_pubkeys), value))
else:
destination_outputs_new.append((address, value))
destination_outputs = destination_outputs_new
destination_btc_out = sum([value for address, value in destination_outputs])
'''Data'''
if data:
# Data encoding methods (choose and validate).
if encoding == 'auto':
if len(data) + len(config.PREFIX) <= config.OP_RETURN_MAX_SIZE:
encoding = 'opreturn'
else:
encoding = 'multisig'
elif encoding not in ('pubkeyhash', 'multisig', 'opreturn'):
raise exceptions.TransactionError('Unknown encoding‐scheme.')
if encoding == 'multisig':
# dust_return_pubkey should be set or explicitly set to False to use the default configured for the node
# the default for the node is optional so could fail
if (source_is_p2sh and dust_return_pubkey is None) or (dust_return_pubkey is False and config.P2SH_DUST_RETURN_PUBKEY is None):
raise exceptions.TransactionError("Can't use multisig encoding when source is P2SH and no dust_return_pubkey is provided.")
elif dust_return_pubkey is False:
dust_return_pubkey = binascii.unhexlify(config.P2SH_DUST_RETURN_PUBKEY)
# Divide data into chunks.
if encoding == 'pubkeyhash':
# Prefix is also a suffix here.
chunk_size = 20 - 1 - 8
elif encoding == 'multisig':
# Two pubkeys, minus length byte, minus prefix, minus two nonces,
# minus two sign bytes.
chunk_size = (33 * 2) - 1 - 8 - 2 - 2
elif encoding == 'opreturn':
chunk_size = config.OP_RETURN_MAX_SIZE
if len(data) + len(config.PREFIX) > chunk_size:
raise exceptions.TransactionError('One `OP_RETURN` output per transaction.')
data_array = list(chunks(data, chunk_size))
# Data outputs.
if encoding == 'multisig':
data_value = multisig_dust_size
elif encoding == 'opreturn':
data_value = op_return_value
else:
# Pay‐to‐PubKeyHash, e.g.
data_value = regular_dust_size
data_output = (data_array, data_value)
if not dust_return_pubkey:
if encoding == 'multisig':
dust_return_pubkey = get_dust_return_pubkey(source, provided_pubkeys, encoding)
else:
dust_return_pubkey = None
else:
data_array = []
data_output = None
dust_return_pubkey = None
data_btc_out = sum([data_value for data_chunk in data_array])
'''Inputs'''
# Calculate collective size of outputs, for fee calculation.
p2pkhsize = 25 + 9
if encoding == 'multisig':
data_output_size = 81 # 71 for the data
elif encoding == 'opreturn':
data_output_size = 90 # 80 for the data
else:
data_output_size = p2pkhsize # Pay‐to‐PubKeyHash (25 for the data?)
outputs_size = (p2pkhsize * len(destination_outputs)) + (len(data_array) * data_output_size)
# Get inputs.
multisig_inputs = not data
use_inputs = custom_inputs # Array of UTXOs, as retrieved by listunspent function from bitcoind
if custom_inputs is None:
if unspent_tx_hash is not None:
unspent = backend.get_unspent_txouts(source, unconfirmed=allow_unconfirmed_inputs, unspent_tx_hash=unspent_tx_hash, multisig_inputs=multisig_inputs)
else:
unspent = backend.get_unspent_txouts(source, unconfirmed=allow_unconfirmed_inputs, multisig_inputs=multisig_inputs)
# filter out any locked UTXOs to prevent creating transactions that spend the same UTXO when they're created at the same time
if UTXO_LOCKS is not None and source in UTXO_LOCKS:
unspentkeys = {make_outkey(output) for output in unspent}
filtered_unspentkeys = unspentkeys - UTXO_LOCKS[source].keys()
unspent = [output for output in unspent if make_outkey(output) in filtered_unspentkeys]
unspent = backend.sort_unspent_txouts(unspent)
logger.debug('Sorted candidate UTXOs: {}'.format([print_coin(coin) for coin in unspent]))
use_inputs = unspent
# use backend estimated fee_per_kb
if estimate_fee_per_kb:
estimated_fee_per_kb = backend.fee_per_kb(estimate_fee_per_kb_nblocks)
if estimated_fee_per_kb is not None:
fee_per_kb = max(estimated_fee_per_kb, fee_per_kb) # never drop below the default fee_per_kb
logger.debug('Fee/KB {:.8f}'.format(fee_per_kb / config.UNIT))
inputs = []
btc_in = 0
change_quantity = 0
sufficient_funds = False
final_fee = fee_per_kb
desired_input_count = 1
if encoding == 'multisig' and data_array and util.enabled('bytespersigop'):
desired_input_count = len(data_array) * 2
for coin in use_inputs:
logger.debug('New input: {}'.format(print_coin(coin)))
inputs.append(coin)
btc_in += round(coin['amount'] * config.UNIT)
size = 181 * len(inputs) + outputs_size + 10
necessary_fee = int(size / 1000 * fee_per_kb)
# If exact fee is specified, use that. Otherwise, calculate size of tx
# and base fee on that (plus provide a minimum fee for selling BTC).
if exact_fee:
final_fee = exact_fee
else:
final_fee = max(fee_provided, necessary_fee)
# Check if good.
btc_out = destination_btc_out + data_btc_out
change_quantity = btc_in - (btc_out + final_fee)
logger.debug('Size: {} Fee: {:.8f} Change quantity: {:.8f} BTC'.format(size, final_fee / config.UNIT, change_quantity / config.UNIT))
# If change is necessary, must not be a dust output.
if change_quantity == 0 or change_quantity >= regular_dust_size:
sufficient_funds = True
if len(inputs) >= desired_input_count:
break
if not sufficient_funds:
# Approximate needed change, fee by with most recently calculated
# quantities.
btc_out = destination_btc_out + data_btc_out
total_btc_out = btc_out + max(change_quantity, 0) + final_fee
raise exceptions.BalanceError('Insufficient {} at address {}. (Need approximately {} {}.) To spend unconfirmed coins, use the flag `--unconfirmed`. (Unconfirmed coins cannot be spent from multi‐sig addresses.)'.format(config.BTC, source, total_btc_out / config.UNIT, config.BTC))
# Lock the source's inputs (UTXOs) chosen for this transaction
if UTXO_LOCKS is not None and not disable_utxo_locks:
if source not in UTXO_LOCKS:
UTXO_LOCKS[source] = cachetools.TTLCache(
UTXO_LOCKS_PER_ADDRESS_MAXSIZE, config.UTXO_LOCKS_MAX_AGE)
for input in inputs:
UTXO_LOCKS[source][make_outkey(input)] = input
logger.debug("UTXO locks: Potentials ({}): {}, Used: {}, locked UTXOs: {}".format(
len(unspent), [make_outkey(coin) for coin in unspent],
[make_outkey(input) for input in inputs], list(UTXO_LOCKS[source].keys())))
'''Finish'''
# Change output.
if change_quantity:
if script.is_multisig(source):
change_address = backend.multisig_pubkeyhashes_to_pubkeys(source, provided_pubkeys)
else:
change_address = source
change_output = (change_address, change_quantity)
else:
change_output = None
# in bitcoin core v0.12.1 a -bytespersigop was added that messes with bare multisig transactions,
# as a safeguard we fall back to pubkeyhash encoding when unsure
# when len(inputs) > len(data_outputs) there's more bytes:sigops ratio and we can safely continue
if encoding == 'multisig' and inputs and data_output and len(inputs) < len(data_array) * 2 and util.enabled('bytespersigop'):
# if auto encoding we can do pubkeyhash encoding instead
if desired_encoding == 'auto':
return construct(db, tx_info,
encoding='pubkeyhash',
fee_per_kb=fee_per_kb,
regular_dust_size=regular_dust_size,
multisig_dust_size=multisig_dust_size,
op_return_value=op_return_value,
exact_fee=exact_fee, fee_provided=fee_provided, provided_pubkeys=provided_pubkeys,
allow_unconfirmed_inputs=allow_unconfirmed_inputs, unspent_tx_hash=unspent_tx_hash, custom_inputs=custom_inputs)
# otherwise raise exception
else:
raise exceptions.EncodingError("multisig will be rejected by Bitcoin Core >= v0.12.1, you should use `encoding=auto` or `encoding=pubkeyhash`")
# Serialise inputs and outputs.
unsigned_tx = serialise(encoding, inputs, destination_outputs,
data_output, change_output,
dust_return_pubkey=dust_return_pubkey)
unsigned_tx_hex = binascii.hexlify(unsigned_tx).decode('utf-8')
'''Sanity Check'''
from counterpartylib.lib import blocks
# Desired transaction info.
(desired_source, desired_destination_outputs, desired_data) = tx_info
desired_source = script.make_canonical(desired_source)
desired_destination = script.make_canonical(desired_destination_outputs[0][0]) if desired_destination_outputs else ''
# NOTE: Include change in destinations for BTC transactions.
# if change_output and not desired_data and desired_destination != config.UNSPENDABLE:
# if desired_destination == '':
# desired_destination = desired_source
# else:
# desired_destination += '-{}'.format(desired_source)
# NOTE
if desired_data == None:
desired_data = b''
# Parsed transaction info.
try:
parsed_source, parsed_destination, x, y, parsed_data = blocks._get_tx_info(unsigned_tx_hex)
except exceptions.BTCOnlyError:
# Skip BTC‐only transactions.
return unsigned_tx_hex
desired_source = script.make_canonical(desired_source)
# Check desired info against parsed info.
desired = (desired_source, desired_destination, desired_data)
parsed = (parsed_source, parsed_destination, parsed_data)
if desired != parsed:
# Unlock (revert) UTXO locks
if UTXO_LOCKS is not None:
for input in inputs:
UTXO_LOCKS[source].pop(make_outkey(input), None)
raise exceptions.TransactionError('Constructed transaction does not parse correctly: {} ≠ {}'.format(desired, parsed))
return unsigned_tx_hex
def construct(db,
tx_info,
encoding='auto',
fee_per_kb=config.DEFAULT_FEE_PER_KB,
estimate_fee_per_kb=None,
estimate_fee_per_kb_nblocks=config.ESTIMATE_FEE_NBLOCKS,
regular_dust_size=config.DEFAULT_REGULAR_DUST_SIZE,
multisig_dust_size=config.DEFAULT_MULTISIG_DUST_SIZE,
op_return_value=config.DEFAULT_OP_RETURN_VALUE,
exact_fee=None,
fee_provided=0,
provided_pubkeys=None,
dust_return_pubkey=None,
allow_unconfirmed_inputs=False,
unspent_tx_hash=None,
custom_inputs=None,
disable_utxo_locks=False):
if estimate_fee_per_kb is None:
estimate_fee_per_kb = config.ESTIMATE_FEE_PER_KB
global UTXO_LOCKS
desired_encoding = encoding
(source, destination_outputs, data) = tx_info
if dust_return_pubkey:
dust_return_pubkey = binascii.unhexlify(dust_return_pubkey)
# Source.
# If public key is necessary for construction of (unsigned)
# transaction, use the public key provided, or find it from the
# blockchain.
if source:
script.validate(source)
source_is_p2sh = script.is_p2sh(source)
# Sanity checks.
if exact_fee and not isinstance(exact_fee, int):
raise exceptions.TransactionError('Exact fees must be in satoshis.')
if not isinstance(fee_provided, int):
raise exceptions.TransactionError('Fee provided must be in satoshis.')
if UTXO_LOCKS is None and config.UTXO_LOCKS_MAX_ADDRESSES > 0: # initialize if configured
UTXO_LOCKS = util.DictCache(size=config.UTXO_LOCKS_MAX_ADDRESSES)
'''Destinations'''
# Destination outputs.
# Replace multi‐sig addresses with multi‐sig pubkeys. Check that the
# destination output isn’t a dust output. Set null values to dust size.
destination_outputs_new = []
for (address, value) in destination_outputs:
# Value.
if script.is_multisig(address):
dust_size = multisig_dust_size
else:
dust_size = regular_dust_size
if value == None:
value = dust_size
elif value < dust_size:
raise exceptions.TransactionError('Destination output is dust.')
# Address.
script.validate(address)
if script.is_multisig(address):
destination_outputs_new.append(
(backend.multisig_pubkeyhashes_to_pubkeys(
address, provided_pubkeys), value))
else:
destination_outputs_new.append((address, value))
destination_outputs = destination_outputs_new
destination_btc_out = sum(
[value for address, value in destination_outputs])
'''Data'''
if data:
# Data encoding methods (choose and validate).
if encoding == 'auto':
if len(data) + len(config.PREFIX) <= config.OP_RETURN_MAX_SIZE:
encoding = 'opreturn'
else:
encoding = 'multisig'
elif encoding not in ('pubkeyhash', 'multisig', 'opreturn'):
raise exceptions.TransactionError('Unknown encoding‐scheme.')
if encoding == 'multisig':
# dust_return_pubkey should be set or explicitly set to False to use the default configured for the node
# the default for the node is optional so could fail
if (source_is_p2sh and dust_return_pubkey is None) or (
dust_return_pubkey is False
and config.P2SH_DUST_RETURN_PUBKEY is None):
raise exceptions.TransactionError(
"Can't use multisig encoding when source is P2SH and no dust_return_pubkey is provided."
)
elif dust_return_pubkey is False:
dust_return_pubkey = binascii.unhexlify(
config.P2SH_DUST_RETURN_PUBKEY)
# Divide data into chunks.
if encoding == 'pubkeyhash':
# Prefix is also a suffix here.
chunk_size = 20 - 1 - 8
elif encoding == 'multisig':
# Two pubkeys, minus length byte, minus prefix, minus two nonces,
# minus two sign bytes.
chunk_size = (33 * 2) - 1 - 8 - 2 - 2
elif encoding == 'opreturn':
chunk_size = config.OP_RETURN_MAX_SIZE
if len(data) + len(config.PREFIX) > chunk_size:
raise exceptions.TransactionError(
'One `OP_RETURN` output per transaction.')
data_array = list(chunks(data, chunk_size))
# Data outputs.
if encoding == 'multisig':
data_value = multisig_dust_size
elif encoding == 'opreturn':
data_value = op_return_value
else:
# Pay‐to‐PubKeyHash, e.g.
data_value = regular_dust_size
data_output = (data_array, data_value)
if not dust_return_pubkey:
if encoding == 'multisig':
dust_return_pubkey = get_dust_return_pubkey(
source, provided_pubkeys, encoding)
else:
dust_return_pubkey = None
else:
data_array = []
data_output = None
dust_return_pubkey = None
data_btc_out = sum([data_value for data_chunk in data_array])
'''Inputs'''
# Calculate collective size of outputs, for fee calculation.
p2pkhsize = 25 + 9
if encoding == 'multisig':
data_output_size = 81 # 71 for the data
elif encoding == 'opreturn':
data_output_size = 90 # 80 for the data
else:
data_output_size = p2pkhsize # Pay‐to‐PubKeyHash (25 for the data?)
outputs_size = (p2pkhsize * len(destination_outputs)) + (len(data_array) *
data_output_size)
# Get inputs.
multisig_inputs = not data
use_inputs = custom_inputs # Array of UTXOs, as retrieved by listunspent function from bitcoind
if custom_inputs is None:
if unspent_tx_hash is not None:
unspent = backend.get_unspent_txouts(
source,
unconfirmed=allow_unconfirmed_inputs,
unspent_tx_hash=unspent_tx_hash,
multisig_inputs=multisig_inputs)
else:
unspent = backend.get_unspent_txouts(
source,
unconfirmed=allow_unconfirmed_inputs,
multisig_inputs=multisig_inputs)
# filter out any locked UTXOs to prevent creating transactions that spend the same UTXO when they're created at the same time
if UTXO_LOCKS is not None and source in UTXO_LOCKS:
unspentkeys = {make_outkey(output) for output in unspent}
filtered_unspentkeys = unspentkeys - UTXO_LOCKS[source].keys()
unspent = [
output for output in unspent
if make_outkey(output) in filtered_unspentkeys
]
unspent = backend.sort_unspent_txouts(unspent)
logger.debug('Sorted candidate UTXOs: {}'.format(
[print_coin(coin) for coin in unspent]))
use_inputs = unspent
# use backend estimated fee_per_kb
if estimate_fee_per_kb:
estimated_fee_per_kb = backend.fee_per_kb(estimate_fee_per_kb_nblocks)
if estimated_fee_per_kb is not None:
fee_per_kb = max(
estimated_fee_per_kb,
fee_per_kb) # never drop below the default fee_per_kb
logger.debug('Fee/KB {:.8f}'.format(fee_per_kb / config.UNIT))
inputs = []
btc_in = 0
change_quantity = 0
sufficient_funds = False
final_fee = fee_per_kb
desired_input_count = 1
if encoding == 'multisig' and data_array and util.enabled('bytespersigop'):
desired_input_count = len(data_array) * 2
for coin in use_inputs:
logger.debug('New input: {}'.format(print_coin(coin)))
inputs.append(coin)
btc_in += round(coin['amount'] * config.UNIT)
size = 181 * len(inputs) + outputs_size + 10
necessary_fee = int(size / 1000 * fee_per_kb)
# If exact fee is specified, use that. Otherwise, calculate size of tx
# and base fee on that (plus provide a minimum fee for selling BTC).
if exact_fee:
final_fee = exact_fee
else:
final_fee = max(fee_provided, necessary_fee)
# Check if good.
btc_out = destination_btc_out + data_btc_out
change_quantity = btc_in - (btc_out + final_fee)
logger.debug('Size: {} Fee: {:.8f} Change quantity: {:.8f} BTC'.format(
size, final_fee / config.UNIT, change_quantity / config.UNIT))
# If change is necessary, must not be a dust output.
if change_quantity == 0 or change_quantity >= regular_dust_size:
sufficient_funds = True
if len(inputs) >= desired_input_count:
break
if not sufficient_funds:
# Approximate needed change, fee by with most recently calculated
# quantities.
btc_out = destination_btc_out + data_btc_out
total_btc_out = btc_out + max(change_quantity, 0) + final_fee
raise exceptions.BalanceError(
'Insufficient {} at address {}. (Need approximately {} {}.) To spend unconfirmed coins, use the flag `--unconfirmed`. (Unconfirmed coins cannot be spent from multi‐sig addresses.)'
.format(config.BTC, source, total_btc_out / config.UNIT,
config.BTC))
# Lock the source's inputs (UTXOs) chosen for this transaction
if UTXO_LOCKS is not None and not disable_utxo_locks:
if source not in UTXO_LOCKS:
UTXO_LOCKS[source] = cachetools.TTLCache(
UTXO_LOCKS_PER_ADDRESS_MAXSIZE, config.UTXO_LOCKS_MAX_AGE)
for input in inputs:
UTXO_LOCKS[source][make_outkey(input)] = input
logger.debug(
"UTXO locks: Potentials ({}): {}, Used: {}, locked UTXOs: {}".
format(len(unspent), [make_outkey(coin) for coin in unspent],
[make_outkey(input) for input in inputs],
list(UTXO_LOCKS[source].keys())))
'''Finish'''
# Change output.
if change_quantity:
if script.is_multisig(source):
change_address = backend.multisig_pubkeyhashes_to_pubkeys(
source, provided_pubkeys)
else:
change_address = source
change_output = (change_address, change_quantity)
else:
change_output = None
# in bitcoin core v0.12.1 a -bytespersigop was added that messes with bare multisig transactions,
# as a safeguard we fall back to pubkeyhash encoding when unsure
# when len(inputs) > len(data_outputs) there's more bytes:sigops ratio and we can safely continue
if encoding == 'multisig' and inputs and data_output and len(
inputs) < len(data_array) * 2 and util.enabled('bytespersigop'):
# if auto encoding we can do pubkeyhash encoding instead
if desired_encoding == 'auto':
return construct(db,
tx_info,
encoding='pubkeyhash',
fee_per_kb=fee_per_kb,
regular_dust_size=regular_dust_size,
multisig_dust_size=multisig_dust_size,
op_return_value=op_return_value,
exact_fee=exact_fee,
fee_provided=fee_provided,
provided_pubkeys=provided_pubkeys,
allow_unconfirmed_inputs=allow_unconfirmed_inputs,
unspent_tx_hash=unspent_tx_hash,
custom_inputs=custom_inputs)
# otherwise raise exception
else:
raise exceptions.EncodingError(
"multisig will be rejected by Bitcoin Core >= v0.12.1, you should use `encoding=auto` or `encoding=pubkeyhash`"
)
# Serialise inputs and outputs.
unsigned_tx = serialise(encoding,
inputs,
destination_outputs,
data_output,
change_output,
dust_return_pubkey=dust_return_pubkey)
unsigned_tx_hex = binascii.hexlify(unsigned_tx).decode('utf-8')
'''Sanity Check'''
from counterpartylib.lib import blocks
# Desired transaction info.
(desired_source, desired_destination_outputs, desired_data) = tx_info
desired_source = script.make_canonical(desired_source)
desired_destination = script.make_canonical(
desired_destination_outputs[0]
[0]) if desired_destination_outputs else ''
# NOTE: Include change in destinations for BTC transactions.
# if change_output and not desired_data and desired_destination != config.UNSPENDABLE:
# if desired_destination == '':
# desired_destination = desired_source
# else:
# desired_destination += '-{}'.format(desired_source)
# NOTE
if desired_data == None:
desired_data = b''
# Parsed transaction info.
try:
parsed_source, parsed_destination, x, y, parsed_data = blocks._get_tx_info(
unsigned_tx_hex)
except exceptions.BTCOnlyError:
# Skip BTC‐only transactions.
return unsigned_tx_hex
desired_source = script.make_canonical(desired_source)
# Check desired info against parsed info.
desired = (desired_source, desired_destination, desired_data)
parsed = (parsed_source, parsed_destination, parsed_data)
if desired != parsed:
# Unlock (revert) UTXO locks
if UTXO_LOCKS is not None:
for input in inputs:
UTXO_LOCKS[source].pop(make_outkey(input), None)
raise exceptions.TransactionError(
'Constructed transaction does not parse correctly: {} ≠ {}'.format(
desired, parsed))
return unsigned_tx_hex
def construct_coin_selection(encoding, data_array, source,
allow_unconfirmed_inputs, unspent_tx_hash,
custom_inputs, fee_per_kb, estimate_fee_per_kb,
estimate_fee_per_kb_nblocks, exact_fee,
size_for_fee, fee_provided, destination_btc_out,
data_btc_out, regular_dust_size,
disable_utxo_locks):
global UTXO_LOCKS, UTXO_P2SH_ENCODING_LOCKS
# Array of UTXOs, as retrieved by listunspent function from bitcoind
if custom_inputs:
use_inputs = unspent = custom_inputs
else:
if unspent_tx_hash is not None:
unspent = backend.get_unspent_txouts(
source,
unconfirmed=allow_unconfirmed_inputs,
unspent_tx_hash=unspent_tx_hash)
else:
unspent = backend.get_unspent_txouts(
source, unconfirmed=allow_unconfirmed_inputs)
filter_unspents_utxo_locks = []
if UTXO_LOCKS is not None and source in UTXO_LOCKS:
filter_unspents_utxo_locks = UTXO_LOCKS[source].keys()
filter_unspents_p2sh_locks = UTXO_P2SH_ENCODING_LOCKS.keys()
# filter out any locked UTXOs to prevent creating transactions that spend the same UTXO when they're created at the same time
filtered_unspent = []
for output in unspent:
if make_outkey(
output
) not in filter_unspents_utxo_locks and make_outkey_vin_txid(
output['txid'],
output['vout']) not in filter_unspents_p2sh_locks:
filtered_unspent.append(output)
unspent = filtered_unspent
unspent = backend.sort_unspent_txouts(unspent)
logger.debug('Sorted candidate UTXOs: {}'.format(
[print_coin(coin) for coin in unspent]))
use_inputs = unspent
# use backend estimated fee_per_kb
if estimate_fee_per_kb:
estimated_fee_per_kb = backend.fee_per_kb(estimate_fee_per_kb_nblocks,
config.ESTIMATE_FEE_MODE)
if estimated_fee_per_kb is not None:
fee_per_kb = max(
estimated_fee_per_kb,
fee_per_kb) # never drop below the default fee_per_kb
logger.debug('Fee/KB {:.8f}'.format(fee_per_kb / config.UNIT))
inputs = []
btc_in = 0
change_quantity = 0
sufficient_funds = False
final_fee = fee_per_kb
desired_input_count = 1
if encoding == 'multisig' and data_array and util.enabled('bytespersigop'):
desired_input_count = len(data_array) * 2
# pop inputs until we can pay for the fee
for coin in use_inputs:
logger.debug('New input: {}'.format(print_coin(coin)))
inputs.append(coin)
btc_in += round(coin['amount'] * config.UNIT)
# If exact fee is specified, use that. Otherwise, calculate size of tx
# and base fee on that (plus provide a minimum fee for selling BTC).
size = 181 * len(inputs) + size_for_fee + 10
if exact_fee:
final_fee = exact_fee
else:
necessary_fee = int(size / 1000 * fee_per_kb)
final_fee = max(fee_provided, necessary_fee)
logger.getChild('p2shdebug').debug(
'final_fee inputs: %d size: %d final_fee %s' %
(len(inputs), size, final_fee))
# Check if good.
btc_out = destination_btc_out + data_btc_out
change_quantity = btc_in - (btc_out + final_fee)
logger.debug('Size: {} Fee: {:.8f} Change quantity: {:.8f} BTC'.format(
size, final_fee / config.UNIT, change_quantity / config.UNIT))
# If change is necessary, must not be a dust output.
if change_quantity == 0 or change_quantity >= regular_dust_size:
sufficient_funds = True
if len(inputs) >= desired_input_count:
break
if not sufficient_funds:
# Approximate needed change, fee by with most recently calculated
# quantities.
btc_out = destination_btc_out + data_btc_out
total_btc_out = btc_out + max(change_quantity, 0) + final_fee
raise exceptions.BalanceError(
'Insufficient {} at address {}. (Need approximately {} {}.) To spend unconfirmed coins, use the flag `--unconfirmed`. (Unconfirmed coins cannot be spent from multi‐sig addresses.)'
.format(config.BTC, source, total_btc_out / config.UNIT,
config.BTC))
# Lock the source's inputs (UTXOs) chosen for this transaction
if UTXO_LOCKS is not None and not disable_utxo_locks:
if source not in UTXO_LOCKS:
UTXO_LOCKS[source] = cachetools.TTLCache(
UTXO_LOCKS_PER_ADDRESS_MAXSIZE, config.UTXO_LOCKS_MAX_AGE)
for input in inputs:
UTXO_LOCKS[source][make_outkey(input)] = input
logger.debug(
"UTXO locks: Potentials ({}): {}, Used: {}, locked UTXOs: {}".
format(len(unspent), [make_outkey(coin) for coin in unspent],
[make_outkey(input) for input in inputs],
list(UTXO_LOCKS[source].keys())))
# ensure inputs have scriptPubKey
# this is not provided by indexd
inputs = backend.ensure_script_pub_key_for_inputs(inputs)
return inputs, change_quantity, btc_in, final_fee
def get_unspent_txouts(address, unconfirmed=False):
return backend.get_unspent_txouts(address, unconfirmed=unconfirmed, multisig_inputs=False)
def construct (db, tx_info, encoding='auto',
fee_per_kb=config.DEFAULT_FEE_PER_KB,
regular_dust_size=config.DEFAULT_REGULAR_DUST_SIZE,
multisig_dust_size=config.DEFAULT_MULTISIG_DUST_SIZE,
op_return_value=config.DEFAULT_OP_RETURN_VALUE,
exact_fee=None, fee_provided=0, provided_pubkeys=None,
allow_unconfirmed_inputs=False):
(source, destination_outputs, data) = tx_info
# Sanity checks.
if exact_fee and not isinstance(exact_fee, int):
raise exceptions.TransactionError('Exact fees must be in satoshis.')
if not isinstance(fee_provided, int):
raise exceptions.TransactionError('Fee provided must be in satoshis.')
'''Destinations'''
# Destination outputs.
# Replace multi‐sig addresses with multi‐sig pubkeys. Check that the
# destination output isn’t a dust output. Set null values to dust size.
destination_outputs_new = []
for (address, value) in destination_outputs:
# Value.
if script.is_multisig(address):
dust_size = multisig_dust_size
else:
dust_size = regular_dust_size
if value == None:
value = dust_size
elif value < dust_size:
raise exceptions.TransactionError('Destination output is dust.')
# Address.
script.validate(address)
if script.is_multisig(address):
destination_outputs_new.append((backend.multisig_pubkeyhashes_to_pubkeys(address, provided_pubkeys), value))
else:
destination_outputs_new.append((address, value))
destination_outputs = destination_outputs_new
destination_btc_out = sum([value for address, value in destination_outputs])
'''Data'''
# Data encoding methods (choose and validate).
if data:
if encoding == 'auto':
if len(data) + len(config.PREFIX) <= config.OP_RETURN_MAX_SIZE:
encoding = 'opreturn'
else:
encoding = 'multisig'
elif encoding not in ('pubkeyhash', 'multisig', 'opreturn'):
raise exceptions.TransactionError('Unknown encoding‐scheme.')
# Divide data into chunks.
if data:
if encoding == 'pubkeyhash':
# Prefix is also a suffix here.
chunk_size = 20 - 1 - 8
elif encoding == 'multisig':
# Two pubkeys, minus length byte, minus prefix, minus two nonces,
# minus two sign bytes.
chunk_size = (33 * 2) - 1 - 8 - 2 - 2
elif encoding == 'opreturn':
chunk_size = config.OP_RETURN_MAX_SIZE
if len(data) + len(config.PREFIX) > chunk_size:
raise exceptions.TransactionError('One `OP_RETURN` output per transaction.')
data_array = list(chunks(data, chunk_size))
else:
data_array = []
# Data outputs.
if data:
if encoding == 'multisig':
data_value = multisig_dust_size
elif encoding == 'opreturn':
data_value = op_return_value
else:
# Pay‐to‐PubKeyHash, e.g.
data_value = regular_dust_size
data_output = (data_array, data_value)
else:
data_output = None
data_btc_out = sum([data_value for data_chunk in data_array])
'''Inputs'''
# Source.
# If public key is necessary for construction of (unsigned)
# transaction, use the public key provided, or find it from the
# blockchain.
if source:
script.validate(source)
if encoding == 'multisig':
dust_return_pubkey = get_dust_return_pubkey(source, provided_pubkeys, encoding)
else:
dust_return_pubkey = None
# Calculate collective size of outputs, for fee calculation.
if encoding == 'multisig':
data_output_size = 81 # 71 for the data
elif encoding == 'opreturn':
data_output_size = 90 # 80 for the data
else:
data_output_size = 25 + 9 # Pay‐to‐PubKeyHash (25 for the data?)
outputs_size = ((25 + 9) * len(destination_outputs)) + (len(data_array) * data_output_size)
# Get inputs.
multisig_inputs = not data
unspent = backend.get_unspent_txouts(source, unconfirmed=allow_unconfirmed_inputs, multisig_inputs=multisig_inputs)
unspent = backend.sort_unspent_txouts(unspent)
logger.debug('Sorted UTXOs: {}'.format([print_coin(coin) for coin in unspent]))
inputs = []
btc_in = 0
change_quantity = 0
sufficient_funds = False
final_fee = fee_per_kb
for coin in unspent:
logger.debug('New input: {}'.format(print_coin(coin)))
inputs.append(coin)
btc_in += round(coin['amount'] * config.UNIT)
# If exact fee is specified, use that. Otherwise, calculate size of tx
# and base fee on that (plus provide a minimum fee for selling BTC).
if exact_fee:
final_fee = exact_fee
else:
size = 181 * len(inputs) + outputs_size + 10
necessary_fee = (int(size / 1000) + 1) * fee_per_kb
final_fee = max(fee_provided, necessary_fee)
assert final_fee >= 1 * fee_per_kb
# Check if good.
btc_out = destination_btc_out + data_btc_out
change_quantity = btc_in - (btc_out + final_fee)
logger.debug('Change quantity: {} BTC'.format(change_quantity / config.UNIT))
# If change is necessary, must not be a dust output.
if change_quantity == 0 or change_quantity >= regular_dust_size:
sufficient_funds = True
break
if not sufficient_funds:
# Approximate needed change, fee by with most recently calculated
# quantities.
btc_out = destination_btc_out + data_btc_out
total_btc_out = btc_out + max(change_quantity, 0) + final_fee
raise exceptions.BalanceError('Insufficient {} at address {}. (Need approximately {} {}.) To spend unconfirmed coins, use the flag `--unconfirmed`. (Unconfirmed coins cannot be spent from multi‐sig addresses.)'.format(config.BTC, source, total_btc_out / config.UNIT, config.BTC))
'''Finish'''
# Change output.
if change_quantity:
if script.is_multisig(source):
change_address = backend.multisig_pubkeyhashes_to_pubkeys(source, provided_pubkeys)
else:
change_address = source
change_output = (change_address, change_quantity)
else:
change_output = None
# Serialise inputs and outputs.
unsigned_tx = serialise(encoding, inputs, destination_outputs,
data_output, change_output,
dust_return_pubkey=dust_return_pubkey)
unsigned_tx_hex = binascii.hexlify(unsigned_tx).decode('utf-8')
'''Sanity Check'''
from counterpartylib.lib import blocks
# Desired transaction info.
(desired_source, desired_destination_outputs, desired_data) = tx_info
desired_source = script.make_canonical(desired_source)
desired_destination = script.make_canonical(desired_destination_outputs[0][0]) if desired_destination_outputs else ''
# NOTE: Include change in destinations for BTC transactions.
# if change_output and not desired_data and desired_destination != config.UNSPENDABLE:
# if desired_destination == '':
# desired_destination = desired_source
# else:
# desired_destination += '-{}'.format(desired_source)
# NOTE
if desired_data == None:
desired_data = b''
# Parsed transaction info.
try:
parsed_source, parsed_destination, x, y, parsed_data = blocks.get_tx_info2(unsigned_tx_hex)
except exceptions.BTCOnlyError:
# Skip BTC‐only transactions.
return unsigned_tx_hex
desired_source = script.make_canonical(desired_source)
# Check desired info against parsed info.
desired = (desired_source, desired_destination, desired_data)
parsed = (parsed_source, parsed_destination, parsed_data)
if desired != parsed:
raise exceptions.TransactionError('Constructed transaction does not parse correctly: {} ≠ {}'.format(desired, parsed))
return unsigned_tx_hex
def construct(db,
tx_info,
encoding='auto',
fee_per_kb=config.DEFAULT_FEE_PER_KB,
regular_dust_size=config.DEFAULT_REGULAR_DUST_SIZE,
multisig_dust_size=config.DEFAULT_MULTISIG_DUST_SIZE,
op_return_value=config.DEFAULT_OP_RETURN_VALUE,
exact_fee=None,
fee_provided=0,
provided_pubkeys=None,
allow_unconfirmed_inputs=False):
(source, destination_outputs, data) = tx_info
# Sanity checks.
if exact_fee and not isinstance(exact_fee, int):
raise exceptions.TransactionError('Exact fees must be in satoshis.')
if not isinstance(fee_provided, int):
raise exceptions.TransactionError('Fee provided must be in satoshis.')
'''Destinations'''
# Destination outputs.
# Replace multi‐sig addresses with multi‐sig pubkeys. Check that the
# destination output isn’t a dust output. Set null values to dust size.
destination_outputs_new = []
for (address, value) in destination_outputs:
# Value.
if script.is_multisig(address):
dust_size = multisig_dust_size
else:
dust_size = regular_dust_size
if value == None:
value = dust_size
elif value < dust_size:
raise exceptions.TransactionError('Destination output is dust.')
# Address.
script.validate(address)
if script.is_multisig(address):
destination_outputs_new.append(
(backend.multisig_pubkeyhashes_to_pubkeys(
address, provided_pubkeys), value))
else:
destination_outputs_new.append((address, value))
destination_outputs = destination_outputs_new
destination_btc_out = sum(
[value for address, value in destination_outputs])
'''Data'''
# Data encoding methods (choose and validate).
if data:
if encoding == 'auto':
if len(data) <= config.OP_RETURN_MAX_SIZE:
encoding = 'multisig' # BTCGuild isn’t mining `OP_RETURN`?!
else:
encoding = 'multisig'
elif encoding not in ('pubkeyhash', 'multisig', 'opreturn'):
raise exceptions.TransactionError('Unknown encoding‐scheme.')
# Divide data into chunks.
if data:
if encoding == 'pubkeyhash':
# Prefix is also a suffix here.
chunk_size = 20 - 1 - 8
elif encoding == 'multisig':
# Two pubkeys, minus length byte, minus prefix, minus two nonces,
# minus two sign bytes.
chunk_size = (33 * 2) - 1 - 8 - 2 - 2
elif encoding == 'opreturn':
chunk_size = config.OP_RETURN_MAX_SIZE
if len(data) > chunk_size:
raise exceptions.TransactionError(
'One `OP_RETURN` output per transaction.')
data_array = list(chunks(data, chunk_size))
else:
data_array = []
# Data outputs.
if data:
if encoding == 'multisig':
data_value = multisig_dust_size
elif encoding == 'opreturn':
data_value = op_return_value
else:
# Pay‐to‐PubKeyHash, e.g.
data_value = regular_dust_size
data_output = (data_array, data_value)
else:
data_output = None
data_btc_out = sum([data_value for data_chunk in data_array])
'''Inputs'''
# Source.
# If public key is necessary for construction of (unsigned)
# transaction, use the public key provided, or find it from the
# blockchain.
if source:
script.validate(source)
dust_return_pubkey = get_dust_return_pubkey(source, provided_pubkeys,
encoding)
# Calculate collective size of outputs, for fee calculation.
if encoding == 'multisig':
data_output_size = 81 # 71 for the data
elif encoding == 'opreturn':
data_output_size = 90 # 80 for the data
else:
data_output_size = 25 + 9 # Pay‐to‐PubKeyHash (25 for the data?)
outputs_size = ((25 + 9) * len(destination_outputs)) + (len(data_array) *
data_output_size)
# Get inputs.
unspent = backend.get_unspent_txouts(source)
unspent = backend.sort_unspent_txouts(unspent, allow_unconfirmed_inputs)
logger.debug('Sorted UTXOs: {}'.format(
[print_coin(coin) for coin in unspent]))
inputs = []
btc_in = 0
change_quantity = 0
sufficient_funds = False
final_fee = fee_per_kb
for coin in unspent:
logger.debug('New input: {}'.format(print_coin(coin)))
inputs.append(coin)
btc_in += round(coin['amount'] * config.UNIT)
# If exact fee is specified, use that. Otherwise, calculate size of tx
# and base fee on that (plus provide a minimum fee for selling BTC).
if exact_fee:
final_fee = exact_fee
else:
size = 181 * len(inputs) + outputs_size + 10
necessary_fee = (int(size / 1000) + 1) * fee_per_kb
final_fee = max(fee_provided, necessary_fee)
assert final_fee >= 1 * fee_per_kb
# Check if good.
btc_out = destination_btc_out + data_btc_out
change_quantity = btc_in - (btc_out + final_fee)
logger.debug('Change quantity: {} BTC'.format(change_quantity /
config.UNIT))
# If change is necessary, must not be a dust output.
if change_quantity == 0 or change_quantity >= regular_dust_size:
sufficient_funds = True
break
if not sufficient_funds:
# Approximate needed change, fee by with most recently calculated
# quantities.
btc_out = destination_btc_out + data_btc_out
total_btc_out = btc_out + max(change_quantity, 0) + final_fee
raise exceptions.BalanceError(
'Insufficient {} at address {}. (Need approximately {} {}.) To spend unconfirmed coins, use the flag `--unconfirmed`. (Unconfirmed coins cannot be spent from multi‐sig addresses.)'
.format(config.BTC, source, total_btc_out / config.UNIT,
config.BTC))
'''Finish'''
# Change output.
if change_quantity:
if script.is_multisig(source):
change_address = backend.multisig_pubkeyhashes_to_pubkeys(
source, provided_pubkeys)
else:
change_address = source
change_output = (change_address, change_quantity)
else:
change_output = None
# Serialise inputs and outputs.
unsigned_tx = serialise(encoding,
inputs,
destination_outputs,
data_output,
change_output,
dust_return_pubkey=dust_return_pubkey)
unsigned_tx_hex = binascii.hexlify(unsigned_tx).decode('utf-8')
'''Sanity Check'''
from counterpartylib.lib import blocks
# Desired transaction info.
(desired_source, desired_destination_outputs, desired_data) = tx_info
desired_source = script.make_canonical(desired_source)
desired_destination = script.make_canonical(
desired_destination_outputs[0]
[0]) if desired_destination_outputs else ''
# NOTE: Include change in destinations for BTC transactions.
# if change_output and not desired_data and desired_destination != config.UNSPENDABLE:
# if desired_destination == '':
# desired_destination = desired_source
# else:
# desired_destination += '-{}'.format(desired_source)
# NOTE
if desired_data == None:
desired_data = b''
# Parsed transaction info.
try:
parsed_source, parsed_destination, x, y, parsed_data = blocks.get_tx_info2(
unsigned_tx_hex)
except exceptions.BTCOnlyError:
# Skip BTC‐only transactions.
return unsigned_tx_hex
desired_source = script.make_canonical(desired_source)
# Check desired info against parsed info.
if (desired_source, desired_destination,
desired_data) != (parsed_source, parsed_destination, parsed_data):
raise exceptions.TransactionError(
'constructed transaction does not parse correctly')
return unsigned_tx_hex
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)
def test_p2sh_encoding_long_data(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_per_kb = 50000
result = api.compose_transaction(
server_db,
'broadcast', {
'source': source,
'text': 'The quick brown fox jumped over the lazy dog. ' * 12,
'fee_fraction': 0,
'timestamp': 1512155862,
'value': 0,
},
encoding='p2sh',
fee_per_kb=fee_per_kb)
assert not isinstance(result, list)
pretxhex = result
pretx = bitcoinlib.core.CTransaction.deserialize(
binascii.unhexlify(pretxhex))
actual_fee = int(len(pretxhex) / 2 * fee_per_kb / 1000)
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])
pretx_fee = 12950
assert len(pretx.vout) == 3
assert len(pretxhex) / 2 == 174
assert sumvin == 199909140
assert sumvout < sumvin
assert sumvout == (sumvin - pretx_fee)
# data P2SH output
expected_datatx_length = 1156
expected_datatx_fee = int(expected_datatx_length / 1000 * fee_per_kb)
expected_datatx_fee_rounded = int(math.ceil(
expected_datatx_fee / 2)) * 2
assert repr(
pretx.vout[0].scriptPubKey
) == "CScript([OP_HASH160, x('7698101f9b9e5cdf0a0e11c2972dbc4860f374bf'), OP_EQUAL])"
assert pretx.vout[0].nValue == int(math.ceil(expected_datatx_fee / 2))
assert pretx.vout[1].nValue == int(math.ceil(expected_datatx_fee / 2))
# change output
assert pretx.vout[
2].nValue == sumvin - expected_datatx_fee_rounded - pretx_fee
assert pretxhex == "0100000001c1d8c075936c3495f6d653c50f73d987f75448d97a750249b1eb83bee71b24ae000000001976a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788acffffffff03e47000000000000017a9147698101f9b9e5cdf0a0e11c2972dbc4860f374bf87e47000000000000017a914676d587edf25cf01d3b153ff0b71f5e9b622386387b64ae90b000000001976a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788ac00000000"
# 00000001 | version
# 01 | inputs
# c1d8c075936c3495f6d653c50f73d987f75448d97a750249b1eb83bee71b24ae | txout hash
# 00000000 | txout index
# 19 | script length
# 76a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788ac | tx_script
# ffffffff | Sequence
# 03 | number of outputs (3)
# e470000000000000 | output 1 value (28900)
# 17 | output 1 length (23 bytes)
# a9147698101f9b9e5cdf0a0e11c2972dbc4860f374bf87 | output 1 script
# e470000000000000 | output 2 value (28900)
# 17 | output 2 length (23 bytes)
# a914676d587edf25cf01d3b153ff0b71f5e9b622386387 | output 2 script
# b64ae90b00000000 | output 3 value (199838390)
# 19 | output 3 length (25 bytes)
# 76a9144838d8b3588c4c7ba7c1d06f866e9b3739c6303788ac | output 3 script
# 00000000 | locktime
# store transaction
pretxid, _ = util_test.insert_raw_transaction(pretxhex, server_db)
logger.debug('pretxid %s' % (pretxid))
# now compose the data transaction
result = api.compose_transaction(
server_db,
'broadcast',
{
'source': source,
'text': 'The quick brown fox jumped over the lazy dog. ' * 12,
'fee_fraction': 0,
'timestamp': 1512155862,
'value': 0,
},
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])
assert len(datatx.vin) == 2
assert len(datatxhex) / 2 == 1682 / 2
assert sumvin == expected_datatx_fee_rounded
assert sumvout < sumvin
assert sumvout == sumvin - expected_datatx_fee_rounded
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 == "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"
# 01000000 | version
# 02 | inputs
# f33f677de4180f1b0c261a991974c57de97f082a7e62332b77ec5d193d13d1a3 | txout hash
# 00000000 | txout index (0)
# fd | script length (253)
# 4d024d080254455354585858580000001e5a21aad6000000000000000000000000 | tx_script
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e20 | ...
# 54686520717569636b2062726f776e20666f78206a756d706564206f766572202975210282b886c087eb37dc8182 | ...
# f14ba6cc3e9485ed618b95804d44aecc17c300b585b0ad007574008717a9147698101f9b9e5cdf0a0e11c2972dbc | ...
# 4860f374bf87 | ...
# ffffffff | Sequence
# f33f677de4180f1b0c261a991974c57de97f082a7e62332b77ec5d193d13d1a3 | txout hash
# 01000000 | txout index (1)
# 87 | script length (135)
# 445445535458585858746865206c617a7920646f672e20 | tx_script
# 54686520717569636b2062726f776e20666f78206a756d706564206f76657220746865206c617a7920646f672e202975 | ...
# 210282b886c087eb37dc8182f14ba6cc3e9485ed618b95804d44aecc17c300b585b0ad517574008717a914676d587edf | ...
# 25cf01d3b153ff0b71f5e9b622386387 | ...
# 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(
"0000001e5a21aad6000000000000000000000000"
) + b'The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. The quick brown fox jumped over the lazy dog. ' # ID=enhanced_send(0x1e) ASSET=XCP(0x01) VALUE=100(0x64) destination_pubkey(0x6f8d...d6ec)
assert parsed_btc_amount == 0
assert parsed_fee == expected_datatx_fee_rounded