def dump_failure_info(spend_tx, script_in, script_out, flags, flags_string, expected, actual, message, comment):
return
print()
print(flags_string)
print("EXPECTED: %s" % expected)
print("ACTUAL: %s" % actual)
print("MESSAGE: %s" % message)
print(comment)
print(disassemble(compile(script_in)))
print(disassemble(compile(script_out)))
from pycoin.serialize import b2h
def tbf(*args):
pc, opcode, data, stack, altstack, is_signature, is_condition = args
from pycoin.tx.script.tools import disassemble_for_opcode_data
opd = disassemble_for_opcode_data(opcode, data)
if len(altstack) == 0:
altstack = ''
print("%s %s\n %3x %s" % (stack, altstack, pc, opd))
import pdb
pdb.set_trace()
print("test failed: '%s' '%s' : %s %s" % (script_in, script_out, comment, flags_string))
try:
check_solution(spend_tx, tx_in_idx=0, traceback_f=tbf, flags=flags)
except Exception as ex:
print(ex)
try:
check_solution(spend_tx, tx_in_idx=0, traceback_f=tbf, flags=flags)
except Exception as ex:
print(ex)
import pdb; pdb.set_trace()
def get_tx(tx_hash):
"""
Get a Tx by its hash.
"""
# TODO: fix this
j = get_json_for_hash(tx_hash)
txs_in = []
for j_in in j.get("in"):
if j_in.get("coinbase"):
txs_in.append(
TxIn.coinbase_tx_in(binascii.unhexlify(j_in["coinbase"])))
else:
txs_in.append(
TxIn(h2b_rev(j_in["prev_out"]["hash"]),
int(j_in["prev_out"]["n"]),
tools.compile(j_in["scriptSig"])))
txs_out = []
for j_out in j.get("out"):
txs_out.append(
TxOut(int(btc_to_satoshi(j_out["value"])),
tools.compile(j_out["scriptPubKey"])))
tx = Tx(int(j["ver"]), txs_in, txs_out, int(j["lock_time"]))
assert tx.hash() == tx_hash
return tx
def tx_from_json_dict(r):
version = r.get("version")
lock_time = r.get("locktime")
txs_in = []
for vin in r.get("vin"):
if "coinbase" in vin:
previous_hash = b'\0' * 32
script = h2b(vin.get("coinbase"))
previous_index = 4294967295
else:
previous_hash = h2b_rev(vin.get("txid"))
scriptSig = vin.get("scriptSig")
if "hex" in scriptSig:
script = h2b(scriptSig.get("hex"))
else:
script = tools.compile(scriptSig.get("asm"))
previous_index = vin.get("vout")
sequence = vin.get("sequence")
txs_in.append(TxIn(previous_hash, previous_index, script, sequence))
txs_out = []
for vout in r.get("vout"):
coin_value = btc_to_satoshi(decimal.Decimal(vout.get("value")))
script = tools.compile(vout.get("scriptPubKey").get("asm"))
txs_out.append(TxOut(coin_value, script))
tx = Tx(version, txs_in, txs_out, lock_time)
bh = r.get("blockhash")
if bh:
bh = h2b_rev(bh)
tx.confirmation_block_hash = bh
return tx
class TxScript():
TEMPLATES = [
tools.compile("OP_PUBKEY OP_CHECKSIG"),
tools.compile(
"OP_DUP OP_HASH160 OP_PUBKEYHASH OP_EQUALVERIFY OP_CHECKSIG"),
tools.compile("OP_1 OP_PUBKEY OP_PUBKEY OP_2 OP_CHECKMULTISIG"),
]
def __init__(self, script):
self.script = script
def match_script_to_templates(self):
"""Examine the script passed in by tx_out_script and see if it
matches the form of one of the templates in TEMPLATES. If so,
return the form it matches; otherwise, return None."""
for script2 in TxScript.TEMPLATES:
r = []
pc1 = pc2 = 0
while 1:
if pc1 == len(self.script) and pc2 == len(script2):
return r
opcode1, data1, pc1 = tools.get_opcode(self.script, pc1)
opcode2, data2, pc2 = tools.get_opcode(script2, pc2)
if opcode2 == opcodes.OP_PUBKEY:
l1 = len(data1)
if l1 < 33 or l1 > 120:
break
r.append((opcode2, data1))
elif opcode2 == opcodes.OP_PUBKEYHASH:
if len(data1) != 160 / 8:
break
r.append((opcode2, data1))
elif (opcode1, data1) != (opcode2, data2):
break
raise SolvingError("don't recognize output script")
def bitcoin_address_for_script(self, is_test=False):
try:
r = self.match_script_to_templates()
if len(r) != 1 or len(r[0]) != 2:
return None
if r[0][0] == opcodes.OP_PUBKEYHASH:
return hash160_sec_to_bitcoin_address(r[0][1], is_test=is_test)
if r[0][0] == opcodes.OP_PUBKEY:
sec = r[0][1]
return public_pair_to_bitcoin_address(
sec_to_public_pair(sec),
compressed=is_sec_compressed(sec),
is_test=is_test)
except SolvingError:
pass
return None
def to_asm(self):
return tools.disassemble(self.script)
def make_script_test(script_in, script_out, flags_string, comment, expected,
coin_value, script_witness):
script_in_bin = compile(script_in)
script_out_bin = compile(script_out)
script_witness_bin = [h2b(w) for w in script_witness]
flags = parse_flags(flags_string)
def f(self):
try:
credit_tx = build_credit_tx(script_out_bin, coin_value)
spend_tx = build_spending_tx(script_in_bin, credit_tx)
spend_tx.txs_in[0].witness = script_witness_bin
msg = ''
check_solution(spend_tx, tx_in_idx=0, flags=flags)
r = 0
except ScriptError as se:
r = se.error_code()
msg = se.args[0]
except:
r = -1
# for now, just deal with 0 versus nonzero
expect_error = getattr(errno, expected)
if r != expect_error:
dump_failure_info(spend_tx, script_in, script_out, flags,
flags_string, expected, r, msg, comment)
self.assertEqual(r, expect_error)
return f
def dump_failure_info(spend_tx, script_in, script_out, flags, flags_string,
expected, actual, message, comment):
return
print()
print(flags_string)
print("EXPECTED: %s" % expected)
print("ACTUAL: %s" % actual)
print("MESSAGE: %s" % message)
print(comment)
print(disassemble(compile(script_in)))
print(disassemble(compile(script_out)))
from pycoin.serialize import b2h
def tbf(*args):
pc, opcode, data, stack, altstack, is_signature, is_condition = args
from pycoin.tx.script.tools import disassemble_for_opcode_data
opd = disassemble_for_opcode_data(opcode, data)
if len(altstack) == 0:
altstack = ''
print("%s %s\n %3x %s" % (stack, altstack, pc, opd))
import pdb
pdb.set_trace()
print("test failed: '%s' '%s' : %s %s" %
(script_in, script_out, comment, flags_string))
try:
check_solution(spend_tx, tx_in_idx=0, traceback_f=tbf, flags=flags)
except Exception as ex:
print(ex)
try:
check_solution(spend_tx, tx_in_idx=0, traceback_f=tbf, flags=flags)
except Exception as ex:
print(ex)
import pdb
pdb.set_trace()
def tx_from_json_dict(r):
version = r.get("version")
lock_time = r.get("locktime")
txs_in = []
for vin in r.get("vin"):
if "coinbase" in vin:
previous_hash = b'\0' * 32
script = h2b(vin.get("coinbase"))
previous_index = 4294967295
else:
previous_hash = h2b_rev(vin.get("txid"))
scriptSig = vin.get("scriptSig")
if "hex" in scriptSig:
script = h2b(scriptSig.get("hex"))
else:
script = tools.compile(scriptSig.get("asm"))
previous_index = vin.get("vout")
sequence = vin.get("sequence")
txs_in.append(TxIn(previous_hash, previous_index, script, sequence))
txs_out = []
for vout in r.get("vout"):
coin_value = btc_to_satoshi(decimal.Decimal(vout.get("value")))
script = tools.compile(vout.get("scriptPubKey").get("asm"))
txs_out.append(TxOut(coin_value, script))
tx = Tx(version, txs_in, txs_out, lock_time)
bh = r.get("blockhash")
if bh:
bh = h2b_rev(bh)
tx.confirmation_block_hash = bh
return tx
def setUp(self):
self.path = ":memory:"
self.config = {
'dw_master_key': 'test',
'testnet': True,
'ccc': {
'colordb_path': self.path
},
'bip0032': False
}
self.pwallet = PersistentWallet(self.path, self.config)
self.pwallet.init_model()
self.model = self.pwallet.get_model()
self.wc = WalletController(self.model)
self.wc.testing = True
self.wc.debug = True
self.colormap = self.model.get_color_map()
self.bcolorset = ColorSet(self.colormap, [''])
wam = self.model.get_address_manager()
self.baddress = wam.get_new_address(self.bcolorset)
self.baddr = self.baddress.get_address()
self.blockhash = '00000000c927c5d0ee1ca362f912f83c462f644e695337ce3731b9f7c5d1ca8c'
self.txhash = '4fe45a5ba31bab1e244114c4555d9070044c73c98636231c77657022d76b87f7'
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.baddress.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.baddr, self.txhash, 0, 100,
script)
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.baddress.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.baddr, self.txhash, 1,
1000000000, script)
self.model.ccc.blockchain_state.bitcoind = MockBitcoinD('test')
def x(s):
return self.blockhash, True
self.model.ccc.blockchain_state.get_tx_blockhash = x
self.moniker = 'test'
self.wc.issue_coins(self.moniker, 'obc', 10000, 1)
self.asset = self.model.get_asset_definition_manager(
).get_asset_by_moniker(self.moniker)
self.basset = self.model.get_asset_definition_manager(
).get_asset_by_moniker('bitcoin')
self.color_id = list(self.asset.color_set.color_id_set)[0]
self.model.ccc.metastore.set_as_scanned(self.color_id, self.blockhash)
def test_nulldata(self):
OP_RETURN = tools.compile("OP_RETURN")
# note that because chr() is used samples with length > 255 will not work
for sample in [b'test', b'me', b'a', b'39qEwuwyb2cAX38MFtrNzvq3KV9hSNov3q', b'', b'0'*80]:
sample_script = OP_RETURN + tools.bin_script([sample])
nd = ScriptNulldata(sample)
self.assertEqual(nd.nulldata, sample)
self.assertEqual(nd.script(), sample_script)
nd2 = ScriptNulldata.from_script(sample_script)
self.assertEqual(nd.nulldata, nd2.nulldata)
out = TxOut(1, nd.script())
tx = Tx(0, [], [out]) # ensure we can create a tx
self.assertEqual(nd.script(), tools.compile(tools.disassemble(nd.script()))) # convert between asm and back to ensure no bugs with compilation
def test_nulldata(self):
OP_RETURN = tools.compile("OP_RETURN")
# note that because chr() is used samples with length > 255 will not work
for sample in [b'test', b'me', b'a', b'39qEwuwyb2cAX38MFtrNzvq3KV9hSNov3q', b'', b'0'*80]:
sample_script = OP_RETURN + tools.bin_script([sample])
nd = ScriptNulldata(sample)
self.assertEqual(nd.nulldata, sample)
self.assertEqual(nd.script(), sample_script)
nd2 = ScriptNulldata.from_script(sample_script)
self.assertEqual(nd.nulldata, nd2.nulldata)
out = TxOut(1, nd.script())
tx = Tx(0, [], [out]) # ensure we can create a tx
self.assertEqual(nd.script(), tools.compile(tools.disassemble(nd.script()))) # convert between asm and back to ensure no bugs with compilation
def f(self):
script_in_bin = compile(script_in)
script_out_bin = compile(script_out)
flags = parse_flags(flags_string)
try:
credit_tx = build_credit_tx(script_out_bin)
spend_tx = build_spending_tx(script_in_bin, credit_tx)
r = spend_tx.is_signature_ok(tx_in_idx=0, flags=flags)
except ScriptError:
r = False
except:
r = -1
if r != expect_valid:
dump_failure_info(spend_tx, script_in, script_out, flags, comment)
self.assertEqual(r, expect_valid)
def f(self):
script_in_bin = compile(script_in)
script_out_bin = compile(script_out)
flags = parse_flags(flags_string)
try:
credit_tx = build_credit_tx(script_out_bin)
spend_tx = build_spending_tx(script_in_bin, credit_tx)
r = spend_tx.is_signature_ok(tx_in_idx=0, flags=flags)
except ScriptError:
r = False
except:
r = -1
if r != expect_valid:
dump_failure_info(spend_tx, script_in, script_out, flags, comment)
self.assertEqual(r, expect_valid)
def test_issue_225(self):
script = tools.compile("OP_RETURN 'foobar'")
tx_out = TxOut(1, script)
address = tx_out.bitcoin_address(netcode="XTN")
self.assertEqual(address, "(nulldata 666f6f626172)")
address = tx_out.bitcoin_address(netcode="BTC")
self.assertEqual(address, "(nulldata 666f6f626172)")
def solve_finalize_commit(self, **kwargs):
hash160_lookup = kwargs.get("hash160_lookup")
sign_value = kwargs.get("sign_value")
signature_type = kwargs.get("signature_type")
existing_script = kwargs.get("existing_script")
# FIXME validate on receiving the commit
# validate payer sig
opcode, data, pc = tools.get_opcode(existing_script, 0) # OP_0
opcode, payer_sig, pc = tools.get_opcode(existing_script, pc)
sig_pair, actual_signature_type = parse_signature_blob(payer_sig)
try:
public_pair = encoding.sec_to_public_pair(self.payer_sec)
sig_pair, signature_type = parse_signature_blob(payer_sig)
valid = ecdsa.verify(ecdsa.generator_secp256k1, public_pair,
sign_value, sig_pair)
if not valid:
raise Exception("Invalid payer public_pair!")
except (encoding.EncodingError, UnexpectedDER):
raise Exception("Invalid payer public_pair!")
# sign
private_key = hash160_lookup.get(encoding.hash160(self.payee_sec))
secret_exponent, public_pair, compressed = private_key
payee_sig = self._create_script_signature(
secret_exponent, sign_value, signature_type
)
script_text = "OP_0 {payer_sig} {payee_sig} OP_1".format(
payer_sig=b2h(payer_sig), payee_sig=b2h(payee_sig)
)
return tools.compile(script_text)
def hash160data_txout(hexdata, dust_limit=common.DUST_LIMIT):
data = binary(hexdata)
if len(data) != 20: # 160 bit
raise exceptions.InvalidHash160DataSize(len(data))
script_text = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG" % b2h(data)
script_bin = tools.compile(script_text)
return TxOut(dust_limit, script_bin)
def build_tx(tx, redeem_script):
for i in range(0, len(tx.txs_in)):
asm = "OP_0 {sigs} {redeem_script}".format(
sigs=" ".join(tx.txs_in[i].sigs), redeem_script=b2h(redeem_script))
solution = tools.compile(asm)
tx.txs_in[i].script = solution
return tx
def make_bare_tx(candidate, change_address, rs_asm, version=1):
# <Tx> components
spendables = []
ins = []
outs = []
# estimate the final (signed) bytesize per input based on the redeemscript
redeem_script = tools.compile(rs_asm)
in_size = estimate_input_size(redeem_script)
# initialize size and amount counters
in_amount = Decimal(0)
est_size = TX_COMPONENTS.version + TX_COMPONENTS.out_count + TX_COMPONENTS.in_count
# add output size
est_size += OUTSIZE * 2
# iterate over unspents
for utxo in candidate.utxos:
value = Decimal(utxo.amount) * COIN
in_amount += value
script = h2b(utxo.script)
# for now: test if the in_script we figured we would need, actually matches the in script :D
# reverse that tx hash
prevtx = h2b_rev(utxo.hash)
# output index
outnum = utxo.outpoint
# create "spendable"
spdbl = Spendable(value, script, prevtx, outnum)
spendables.append(spdbl)
# also create this as input
as_input = spdbl.tx_in()
as_input.sigs = []
ins.append(as_input)
# add the estimated size per input
est_size += in_size
# calc fee and out amount
fee = (Decimal(math.ceil(est_size / 1000)) * COIN *
NETWORK_FEE) + FEE_MARGIN
change_amount = Decimal(
math.floor(in_amount - (candidate.amount * COIN) - fee))
# create outputs
outs.append(
TxOut(int(candidate.amount * COIN), make_payto(candidate.address)))
outs.append(TxOut(int(change_amount), make_payto_script(change_address)))
# create bare tx without sigs
tx = Tx(version, ins, outs, 0, spendables)
return tx
def test_issue_225(self):
script = tools.compile("OP_RETURN 'foobar'")
tx_out = TxOut(1, script)
address = tx_out.bitcoin_address(netcode="XTN")
self.assertEqual(address, "(nulldata 666f6f626172)")
address = tx_out.bitcoin_address(netcode="BTC")
self.assertEqual(address, "(nulldata 666f6f626172)")
def add_coins(self):
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.address0.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.addr0, self.txhash, 0, 100,
script)
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.baddress.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.baddr, self.txhash, 1, 20000,
script)
self.model.ccc.metastore.set_as_scanned(self.colorid0, self.blockhash)
self.model.ccc.cdstore.add(self.colorid0, self.txhash, 0, 100, '')
def nulldata_txout(hexdata):
data = binary(hexdata)
if len(data) > 40:
raise exceptions.MaxNulldataExceeded(len(data))
script_text = "OP_RETURN %s" % b2h(data)
script_bin = tools.compile(script_text)
return TxOut(0, script_bin)
def hash160data_txout(hexdata, dust_limit=common.DUST_LIMIT):
data = binary(hexdata)
if len(data) != 20: # 160 bit
raise exceptions.InvalidHash160DataSize(len(data))
script_text = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG" % b2h(data)
script_bin = tools.compile(script_text)
return TxOut(dust_limit, script_bin)
def add_coins(self):
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.address0.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.addr0, self.txhash,
0, 100, script)
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.baddress.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.baddr, self.txhash,
1, 20000, script)
self.model.ccc.metastore.set_as_scanned(self.colorid0, self.blockhash)
self.model.ccc.cdstore.add(self.colorid0, self.txhash, 0, 100, '')
def nulldata_txout(hexdata):
data = binary(hexdata)
if len(data) > common.MAX_NULLDATA:
raise exceptions.MaxNulldataExceeded(len(data), common.MAX_NULLDATA)
script_text = "OP_RETURN %s" % b2h(data)
script_bin = tools.compile(script_text)
return TxOut(0, script_bin)
def hash160data_txout(hexdata, value=548):
data = binary(hexdata)
if len(data) != 20: # 160 bit
raise exceptions.InvalidHash160DataSize(len(data))
script_text = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG" % b2h(data)
script_bin = tools.compile(script_text)
return TxOut(value, script_bin)
def verify_script(script_signature, script_public_key, signature_for_hash_type_f, expected_hash_type=None):
stack = []
is_p2h = (len(script_public_key) == 23 and script_public_key[0] == opcodes.OP_HASH160
and script_public_key[-1] == opcodes.OP_EQUAL)
if not eval_script(script_signature, signature_for_hash_type_f, expected_hash_type, stack):
logging.debug("script_signature did not evaluate")
return False
if is_p2h:
signatures, alt_script_public_key = stack[:-1], stack[-1]
from pycoin.tx.script import tools
from pycoin import serialize
def sub(x):
if x == '00':
return '0'
return x
s1 = [sub(serialize.b2h(s)) for s in signatures]
alt_script_signature = tools.compile(" ".join(s1))
if not eval_script(script_public_key, signature_for_hash_type_f, expected_hash_type, stack):
logging.debug("script_public_key did not evaluate")
return False
if is_p2h and stack[-1] == VCH_TRUE:
return verify_script(alt_script_signature, alt_script_public_key,
signature_for_hash_type_f, expected_hash_type=expected_hash_type)
return stack[-1] == VCH_TRUE
def solve_revoke(self, **kwargs):
hash160_lookup = kwargs["hash160_lookup"]
revoke_secret = kwargs["revoke_secret"]
private_key = hash160_lookup.get(encoding.hash160(self.payer_sec))
secret_exponent, public_pair, compressed = private_key
sig = self._create_sig(secret_exponent, **kwargs)
return tools.compile(
REVOKE_SCRIPTSIG.format(sig=b2h(sig), revoke_secret=revoke_secret))
def setUp(self):
self.path = ":memory:"
self.config = {'dw_master_key': 'test', 'testnet': True, 'ccc': {
'colordb_path' : self.path
}, 'bip0032': False }
self.pwallet = PersistentWallet(self.path, self.config)
self.pwallet.init_model()
self.model = self.pwallet.get_model()
self.wc = WalletController(self.model)
self.wc.testing = True
self.wc.debug = True
self.colormap = self.model.get_color_map()
self.bcolorset = ColorSet(self.colormap, [''])
wam = self.model.get_address_manager()
self.baddress = wam.get_new_address(self.bcolorset)
self.baddr = self.baddress.get_address()
self.blockhash = '00000000c927c5d0ee1ca362f912f83c462f644e695337ce3731b9f7c5d1ca8c'
self.txhash = '4fe45a5ba31bab1e244114c4555d9070044c73c98636231c77657022d76b87f7'
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.baddress.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.baddr, self.txhash,
0, 100, script)
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
self.baddress.rawPubkey().encode("hex"))).encode("hex")
self.model.utxo_man.store.add_utxo(self.baddr, self.txhash,
1, 1000000000, script)
self.model.ccc.blockchain_state.bitcoind = MockBitcoinD('test')
def x(s):
return self.blockhash, True
self.model.ccc.blockchain_state.get_tx_blockhash = x
self.moniker = 'test'
self.wc.issue_coins(self.moniker, 'obc', 10000, 1)
self.asset = self.model.get_asset_definition_manager(
).get_asset_by_moniker(self.moniker)
self.basset = self.model.get_asset_definition_manager(
).get_asset_by_moniker('bitcoin')
self.color_id = list(self.asset.color_set.color_id_set)[0]
self.model.ccc.metastore.set_as_scanned(self.color_id, self.blockhash)
def solve_timeout(self, **kwargs):
hash160_lookup = kwargs["hash160_lookup"]
private_key = hash160_lookup.get(encoding.hash160(self.payer_sec))
secret_exponent, public_pair, compressed = private_key
sig = self._create_script_signature(
secret_exponent, kwargs["sign_value"], kwargs["signature_type"]
)
return tools.compile("{sig} OP_0 OP_0".format(sig=b2h(sig)))
def txout(testnet, targetaddress, value):
testnet = flag(testnet)
targetaddress = address(testnet, targetaddress)
value = positive_integer(value)
prefix = b'\x6f' if testnet else b"\0"
hash160 = b2h(bitcoin_address_to_hash160_sec(targetaddress, prefix))
script_text = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG" % hash160
script_bin = tools.compile(script_text)
return TxOut(value, script_bin)
def solve_payout(self, **kwargs):
hash160_lookup = kwargs["hash160_lookup"]
spend_secret = kwargs["spend_secret"]
private_key = hash160_lookup.get(encoding.hash160(self.payee_sec))
secret_exponent, public_pair, compressed = private_key
sig = self._create_sig(secret_exponent, **kwargs)
return tools.compile(
PAYOUT_SCRIPTSIG.format(sig=b2h(sig), spend_secret=spend_secret))
def txout(testnet, target_address, value):
testnet = flag(testnet)
target_address = address(testnet, target_address)
value = positive_integer(value)
prefix = b'\x6f' if testnet else b"\0"
hash160 = b2h(bitcoin_address_to_hash160_sec(target_address, prefix))
script_text = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG" % hash160
script_bin = tools.compile(script_text)
return TxOut(value, script_bin)
def op_return_this(privatekey, text, prefix = "KEYSTAMP:", bitcoin_fee = 10000):
bitcoin_keyobj = get_key(privatekey)
bitcoin_address = bitcoin_keyobj.bitcoin_address()
## Get the spendable outputs we are going to use to pay the fee
all_spendables = get_spendables_blockcypher(bitcoin_address)
spendables = []
value = 0
for unspent in all_spendables:
while value < bitcoin_fee + 10000:
coin_value = unspent.get("value")
script = h2b(unspent.get("script_hex"))
previous_hash = h2b_rev(unspent.get("tx_hash"))
previous_index = unspent.get("index")
spendables.append(Spendable(coin_value, script, previous_hash, previous_index))
value += coin_value
bitcoin_sum = sum(spendable.coin_value for spendable in spendables)
if(bitcoin_sum < bitcoin_fee):
print "ERROR: not enough balance: available: %s - fee: %s" %(bitcoin_sum, bitcoin_fee)
return False
## Create the inputs we are going to use
inputs = [spendable.tx_in() for spendable in spendables]
## If we will have change left over create an output to send it back
outputs = []
if (bitcoin_sum > bitcoin_fee):
change_output_script = standard_tx_out_script(bitcoin_address)
total_amout = bitcoin_sum - bitcoin_fee
outputs.append(TxOut(total_amout, change_output_script))
# home_address = standard_tx_out_script(bitcoin_address)
# #TODO: it needs some love and IQ on input mananagement stuff
# outputs.append(TxOut((bitcoin_sum - bitcoin_fee), home_address))
## Build the OP_RETURN output with our message
if prefix is not None and (len(text) + len(prefix) <= 80):
text = prefix + text
message = hexlify(text.encode()).decode('utf8')
op_return_output_script = tools.compile("OP_RETURN %s" % message)
outputs.append(TxOut(0, op_return_output_script))
## Create the transaction and sign it with the private key
tx = Tx(version=1, txs_in=inputs, txs_out=outputs)
# print tx.as_hex()
# print spendables
tx.set_unspents(spendables)
sign_tx(tx, wifs=[privatekey])
print "singed_tx: %s" %tx.as_hex()
#TODO: uncomment this when its ready to push data to blockchian
tx_hash = broadcast_tx_blockr(tx.as_hex())
return tx_hash
def coinbase_tx(cls, public_key_sec, coin_value, coinbase_bytes=b'', version=1, lock_time=0, state=0):
"""
Create the special "first in block" transaction that includes the mining fees.
"""
tx_in = cls.TransactionIn.coinbase_tx_in(script=coinbase_bytes)
COINBASE_SCRIPT_OUT = "%s OP_CHECKSIG"
script_text = COINBASE_SCRIPT_OUT % b2h(public_key_sec)
script_bin = tools.compile(script_text)
tx_out = cls.TransactionOut(coin_value, script_bin)
return cls(version, [tx_in], [tx_out], lock_time, state)
def __call__(self, tx_out_script, signature_hash, signature_type):
"""Figure out how to create a signature for the incoming transaction, and sign it.
tx_out_script: the tx_out script that needs to be "solved"
signature_hash: the bignum hash value of the new transaction reassigning the coins
signature_type: always SIGHASH_ALL (1)
"""
if signature_hash == 0:
raise SolvingError("signature_hash can't be 0")
tx_script = TxScript(tx_out_script)
opcode_value_list = tx_script.match_script_to_templates()
ba = bytearray()
compressed = True
for opcode, v in opcode_value_list:
if opcode == opcodes.OP_PUBKEY:
public_pair = sec_to_public_pair(v)
bitcoin_address = public_pair_to_bitcoin_address(
public_pair, compressed=compressed)
elif opcode == opcodes.OP_PUBKEYHASH:
bitcoin_address = hash160_sec_to_bitcoin_address(v)
else:
raise SolvingError("can't determine how to sign this script")
secret_exponent = self.wallet.getsecretexponent(bitcoin_address)
r, s = ecdsa.sign(ecdsa.generator_secp256k1, secret_exponent,
signature_hash)
sig = der.sigencode_der(r, s) + bytes_from_int(signature_type)
ba += tools.compile(binascii.hexlify(sig).decode("utf8"))
if opcode == opcodes.OP_PUBKEYHASH:
public_pair = ecdsa.public_pair_for_secret_exponent(
ecdsa.generator_secp256k1, secret_exponent)
ba += tools.compile(
binascii.hexlify(
public_pair_to_sec(
public_pair,
compressed=compressed)).decode("utf8"))
return bytes(ba)
def main():
the_hash = sys.argv[1]
j = get_json_for_hash(the_hash)
txs_in = []
for j_in in j.get("in"):
txs_in.append(
TxIn(h2b_rev(j_in["prev_out"]["hash"]), int(j_in["prev_out"]["n"]), tools.compile(j_in["scriptSig"]))
)
txs_out = []
for j_out in j.get("out"):
txs_out.append(TxOut(int(float(j_out["value"]) * 1e8 + 0.5), tools.compile(j_out["scriptPubKey"])))
tx = Tx(int(j["ver"]), txs_in, txs_out, int(j["lock_time"]))
assert tx.id() == the_hash
s = io.BytesIO()
tx.stream(s)
v = s.getvalue()
print(linebreak(binascii.b2a_base64(v).decode("utf8"), 72))
def solve_create_commit(self, **kwargs):
hash160_lookup = kwargs["hash160_lookup"]
private_key = hash160_lookup.get(encoding.hash160(self.payer_sec))
secret_exponent, public_pair, compressed = private_key
sig = self._create_sig(secret_exponent, **kwargs)
signature_placeholder = kwargs.get("signature_placeholder",
DEFAULT_PLACEHOLDER_SIGNATURE)
script_asm = COMMIT_SCRIPTSIG.format(
payer_sig=b2h(sig), payee_sig=b2h(signature_placeholder))
return tools.compile(script_asm)
def __init__(self, secret_exponents):
super(OfflineAwareSolver, self).__init__(secret_exponents)
STANDARD_SCRIPT_OUT = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG"
self.script_hash160 = []
for se in secret_exponents:
pp = public_pair_for_secret_exponent(generator_secp256k1, se)
h160sec = public_pair_to_hash160_sec(pp, False)
script_text = STANDARD_SCRIPT_OUT % b2h(h160sec)
print script_text
self.script_hash160.append(compile(script_text))
def compile_commit_script(payer_pubkey, payee_pubkey, spend_secret_hash,
revoke_secret_hash, delay_time):
script_text = COMMIT_SCRIPT.format(
payer_pubkey=payer_pubkey,
payee_pubkey=payee_pubkey,
spend_secret_hash=spend_secret_hash,
revoke_secret_hash=revoke_secret_hash,
delay_time=str(delay_time)
)
return tools.compile(script_text)
def solve_change(self, **kwargs):
hash160_lookup = kwargs["hash160_lookup"]
spend_secret = kwargs["spend_secret"]
private_key = hash160_lookup.get(encoding.hash160(self.payer_sec))
secret_exponent, public_pair, compressed = private_key
sig = self._create_sig(secret_exponent, **kwargs)
spend_secret_hash = get_deposit_spend_secret_hash(b2h(self.script))
provided_spend_secret_hash = b2h(encoding.hash160(h2b(spend_secret)))
assert (spend_secret_hash == provided_spend_secret_hash)
script_asm = CHANGE_SCRIPTSIG.format(sig=b2h(sig), secret=spend_secret)
return tools.compile(script_asm)
def main():
the_hash = sys.argv[1]
j = get_json_for_hash(the_hash)
txs_in = []
for j_in in j.get("in"):
txs_in.append(
TxIn(h2b_rev(j_in["prev_out"]["hash"]), int(j_in["prev_out"]["n"]),
tools.compile(j_in["scriptSig"])))
txs_out = []
for j_out in j.get("out"):
txs_out.append(
TxOut(int(float(j_out["value"]) * 1e8 + 0.5),
tools.compile(j_out["scriptPubKey"])))
tx = Tx(int(j["ver"]), txs_in, txs_out, int(j["lock_time"]))
assert tx.id() == the_hash
s = io.BytesIO()
tx.stream(s)
v = s.getvalue()
print(linebreak(binascii.b2a_base64(v).decode("utf8"), 72))
def fake_transaction(model=MockModel()):
key = "5Kb8kLf9zgWQnogidDA76MzPL6TsZZY36hWXMssSzNydYXYB9KF"
address = LooseAddressRecord(address_data=key)
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
address.rawPubkey().encode("hex"))).encode("hex")
txin = utxodb.UTXO("D34DB33F", 0, 1, script)
txin.address_rec = address
txout = txspec.ComposedTxSpec.TxOut(1, address.get_address())
composed = txspec.ComposedTxSpec([txin], [txout])
return txcons.RawTxSpec.from_composed_tx_spec(model, composed), address
def solve_create_commit(self, **kwargs):
hash160_lookup = kwargs["hash160_lookup"]
private_key = hash160_lookup.get(encoding.hash160(self.payer_sec))
secret_exponent, public_pair, compressed = private_key
sig = self._create_script_signature(
secret_exponent, kwargs["sign_value"], kwargs["signature_type"]
)
signature_placeholder = kwargs.get("signature_placeholder",
DEFAULT_PLACEHOLDER_SIGNATURE)
script_text = "OP_0 {payer_sig} {payee_sig} OP_1".format(
payer_sig=b2h(sig), payee_sig=b2h(signature_placeholder)
)
return tools.compile(script_text)
def fake_transaction(model=MockModel()):
key = "5Kb8kLf9zgWQnogidDA76MzPL6TsZZY36hWXMssSzNydYXYB9KF"
address = LooseAddressRecord(address_data=key)
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
address.rawPubkey().encode("hex"))).encode("hex")
txin = utxodb.UTXO("D34DB33F", 0, 1, script)
txin.address_rec = address
txout = txspec.ComposedTxSpec.TxOut(1, address.get_address())
composed = txspec.ComposedTxSpec([txin], [txout])
return txcons.RawTxSpec.from_composed_tx_spec(model, composed), address
def __call__(self, tx_out_script, signature_hash, signature_type):
"""Figure out how to create a signature for the incoming transaction, and sign it.
tx_out_script: the tx_out script that needs to be "solved"
signature_hash: the bignum hash value of the new transaction reassigning the coins
signature_type: always SIGHASH_ALL (1)
"""
if signature_hash == 0:
raise SolvingError("signature_hash can't be 0")
tx_script = TxScript(tx_out_script)
opcode_value_list = tx_script.match_script_to_templates()
ba = bytearray()
compressed = True
for opcode, v in opcode_value_list:
if opcode == opcodes.OP_PUBKEY:
public_pair = sec_to_public_pair(v)
bitcoin_address = public_pair_to_bitcoin_address(public_pair, compressed=compressed)
elif opcode == opcodes.OP_PUBKEYHASH:
bitcoin_address = hash160_sec_to_bitcoin_address(v)
else:
raise SolvingError("can't determine how to sign this script")
secret_exponent = self.wallet.getsecretexponent(bitcoin_address)
r, s = ecdsa.sign(ecdsa.generator_secp256k1, secret_exponent, signature_hash)
sig = der.sigencode_der(r, s) + bytes_from_int(signature_type)
ba += tools.compile(binascii.hexlify(sig).decode("utf8"))
if opcode == opcodes.OP_PUBKEYHASH:
public_pair = ecdsa.public_pair_for_secret_exponent(ecdsa.generator_secp256k1, secret_exponent)
ba += tools.compile(
binascii.hexlify(public_pair_to_sec(public_pair, compressed=compressed)).decode("utf8")
)
return bytes(ba)
def construct_standard_tx(composed_tx_spec, is_test):
txouts = []
STANDARD_SCRIPT_OUT = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG"
for txout in composed_tx_spec.get_txouts():
hash160 = bitcoin_address_to_hash160_sec(txout.target_addr, is_test)
script_text = STANDARD_SCRIPT_OUT % b2h(hash160)
script_bin = tools.compile(script_text)
txouts.append(TxOut(txout.value, script_bin))
txins = []
for cts_txin in composed_tx_spec.get_txins():
txins.append(TxIn(cts_txin.get_txhash(), cts_txin.prevout.n))
version = 1
lock_time = 0
return Tx(version, txins, txouts, lock_time)
def construct_standard_tx(composed_tx_spec, is_test):
txouts = []
STANDARD_SCRIPT_OUT = "OP_DUP OP_HASH160 %s OP_EQUALVERIFY OP_CHECKSIG"
for txout in composed_tx_spec.get_txouts():
hash160 = bitcoin_address_to_hash160_sec(txout.target_addr, is_test)
script_text = STANDARD_SCRIPT_OUT % b2h(hash160)
script_bin = tools.compile(script_text)
txouts.append(TxOut(txout.value, script_bin))
txins = []
for cts_txin in composed_tx_spec.get_txins():
txins.append(TxIn(cts_txin.get_txhash(), cts_txin.prevout.n))
version = 1
lock_time = 0
return Tx(version, txins, txouts, lock_time)
def get_tx(tx_hash):
"""
Get a Tx by its hash.
"""
# TODO: fix this
j = get_json_for_hash(tx_hash)
txs_in = []
for j_in in j.get("in"):
if j_in.get("coinbase"):
txs_in.append(TxIn.coinbase_tx_in(binascii.unhexlify(j_in["coinbase"])))
else:
txs_in.append(TxIn(
h2b_rev(j_in["prev_out"]["hash"]),
int(j_in["prev_out"]["n"]),
tools.compile(j_in["scriptSig"])))
txs_out = []
for j_out in j.get("out"):
txs_out.append(TxOut(int(btc_to_satoshi(j_out["value"])), tools.compile(j_out["scriptPubKey"])))
tx = Tx(int(j["ver"]), txs_in, txs_out, int(j["lock_time"]))
assert tx.hash() == tx_hash
return tx
def make_script_test(script_in, script_out, flags_string, comment, expected, coin_value, script_witness):
script_in_bin = compile(script_in)
script_out_bin = compile(script_out)
script_witness_bin = [h2b(w) for w in script_witness]
flags = parse_flags(flags_string)
def f(self):
try:
credit_tx = build_credit_tx(script_out_bin, coin_value)
spend_tx = build_spending_tx(script_in_bin, credit_tx)
spend_tx.txs_in[0].witness = script_witness_bin
msg = ''
check_solution(spend_tx, tx_in_idx=0, flags=flags)
r = 0
except ScriptError as se:
r = se.error_code()
msg = se.args[0]
except:
r = -1
# for now, just deal with 0 versus nonzero
expect_error = getattr(errno, expected)
if r != expect_error:
dump_failure_info(spend_tx, script_in, script_out, flags, flags_string, expected, r, msg, comment)
self.assertEqual(r, expect_error)
return f
def solve_change(self, **kwargs):
hash160_lookup = kwargs["hash160_lookup"]
spend_secret = kwargs["spend_secret"]
private_key = hash160_lookup.get(encoding.hash160(self.payer_sec))
secret_exponent, public_pair, compressed = private_key
sig = self._create_script_signature(
secret_exponent, kwargs["sign_value"], kwargs["signature_type"]
)
spend_secret_hash = get_deposit_spend_secret_hash(self.script)
provided_spend_secret_hash = b2h(hash160(h2b(spend_secret)))
assert(spend_secret_hash == provided_spend_secret_hash)
script_text = "{sig} {secret} OP_1 OP_0".format(
sig=b2h(sig), secret=spend_secret
)
return tools.compile(script_text)
def fake_transaction(model=None):
key = ecdsa.SigningKey.from_string(
"\xe8\x00\xb8\xd4\xa1b\xb7o\x0f;\xf2\xcf\xca\xfd\x1a$\xb9\xa9"
"\xeb\x0b\x08X\x9f}9C\xe4\x88\xfdD\x11b", curve=ecdsa.curves.SECP256k1)
address = Address.fromPrivkey(key)
script = tools.compile(
"OP_DUP OP_HASH160 {0} OP_EQUALVERIFY OP_CHECKSIG".format(
address.rawPubkey()[1:-4].encode("hex"))).encode("hex")
utxo = utxodb.UTXO("D34DB33F", 0, 1, script)
utxo.address_rec = object()
utxo.address_rec = AddressRec(address)
txin = txspec.ComposedTxSpec.TxIn(utxo)
txout = txspec.ComposedTxSpec.TxOut(1, address.pubkey)
composed = txspec.ComposedTxSpec([txin], [txout])
return txcons.SignedTxSpec(model, composed, False), address
def spendables_for_address(bitcoin_address):
"""
Return a list of Spendable objects for the
given bitcoin address.
"""
json_response = fetch_json(
"addresses/%s/unspent-outputs" % bitcoin_address)
spendables = []
for tx_out_info in json_response.get("data", {}).get("outputs"):
if tx_out_info.get("to_address") == bitcoin_address:
coin_value = tx_out_info["value"]
script = tools.compile(tx_out_info.get("script_pub_key"))
previous_hash = h2b_rev(tx_out_info.get("transaction_hash"))
previous_index = tx_out_info.get("transaction_index")
spendables.append(
Spendable(coin_value, script, previous_hash, previous_index))
return spendables
def construct_data_tx(data, _from):
# inputs
coins_from = blockchain_info.coin_sources_for_address(_from)
min_coin_value, min_idx, min_h, min_script = max((tx_out.coin_value, idx, h, tx_out.script) for h, idx, tx_out in coins_from)
unsigned_txs_out = [UnsignedTxOut(min_h, min_idx, min_coin_value, min_script)]
# outputs
if min_coin_value > TX_FEES * 2:
return 'max output greater than twice the threshold, too big.'
if min_coin_value < TX_FEES:
return 'max output smaller than threshold, too small.'
script_text = 'OP_RETURN %s' % data.encode('hex')
script_bin = tools.compile(script_text)
new_txs_out = [TxOut(0, script_bin)]
version = 1
lock_time = 0
unsigned_tx = UnsignedTx(version, unsigned_txs_out, new_txs_out, lock_time)
return unsigned_tx
def txs_from_json(path):
"""
Read tests from ./data/tx_??valid.json
Format is an array of arrays
Inner arrays are either [ "comment" ]
or [[[prevout hash, prevout index, prevout scriptPubKey], [input 2], ...], serializedTransaction, verifyFlags]
... where all scripts are stringified scripts.
verifyFlags is a comma separated list of script verification flags to apply, or "NONE"
"""
comments = None
with open(path, 'r') as f:
for tvec in json.load(f):
if len(tvec) == 1:
comments = tvec[0]
continue
assert len(tvec) == 3
prevouts = tvec[0]
for prevout in prevouts:
assert len(prevout) in (3, 4)
tx_hex = tvec[1]
flag_mask = parse_flags(tvec[2])
try:
tx = Tx.from_hex(tx_hex)
except:
print("Cannot parse tx_hex: %s" % tx_hex)
raise
spendable_db = {}
blank_spendable = Spendable(0, b'', b'\0' * 32, 0)
for prevout in prevouts:
coin_value = 1000000
if len(prevout) == 4:
coin_value = prevout[3]
spendable = Spendable(coin_value=coin_value,
script=compile(prevout[2]),
tx_hash=h2b_rev(prevout[0]), tx_out_index=prevout[1])
spendable_db[(spendable.tx_hash, spendable.tx_out_index)] = spendable
unspents = [
spendable_db.get((tx_in.previous_hash, tx_in.previous_index), blank_spendable) for tx_in in tx.txs_in]
tx.set_unspents(unspents)
yield (tx, flag_mask, comments)
def spendables_for_address(bitcoin_address):
"""
Return a list of Spendable objects for the
given bitcoin address.
"""
URL = "https://api.biteasy.com/blockchain/v1/addresses/%s/unspent-outputs" % bitcoin_address
r = Request(URL,
headers={"content-type": "application/json", "accept": "*/*", "User-Agent": "curl/7.29.0"})
d = urlopen(r).read()
json_response = json.loads(d.decode("utf8"))
spendables = []
for tx_out_info in json_response.get("data", {}).get("outputs"):
if tx_out_info.get("to_address") == bitcoin_address:
coin_value = tx_out_info["value"]
script = tools.compile(tx_out_info.get("script_pub_key"))
previous_hash = h2b_rev(tx_out_info.get("transaction_hash"))
previous_index = tx_out_info.get("transaction_index")
spendables.append(Spendable(coin_value, script, previous_hash, previous_index))
return spendables
def construct_data_tx(data, _from, unused_utxo):
coins_from = spendables_for_address(_from, unused_utxo) #Ahora
if len(coins_from) < 1:
ErrorNotification.new('No bitcoins available to spend')
return 'No bitcoins available to spend'
txs_in = [TxIn(coins_from[0].tx_hash, coins_from[0].tx_out_index, coins_from[0].script)]
script_text = 'OP_RETURN %s' % data.encode('hex')
script_bin = tools.compile(script_text)
new_txs_out = [TxOut(0, script_bin)]
version = 1
lock_time = 0
unsigned_tx = Tx(version, txs_in, new_txs_out, lock_time, coins_from)
return unsigned_tx