def test_verify_two_inputs():
"""BTC transaction:
1e976937f0dadc7c7fac9b7c62291f7843bc781ec44ee65c41b9b9e4f10cf0b3"""
r1 = int(
'6545773c1a86326a2e27b0c06af1eccc43304518e3be1f7fe3949a2a7fde8a6f', 16)
s1 = int(
'7bf41875ef112a731835875e187086a322226759d410a2e8ee2fb91813340d43', 16)
x1 = int(
'c0dae3dc13a30b6fc4fbe361a943680148cc028d96d91d6997cbbb572258b308', 16)
y1 = int(
'17defc0d8dde6f62da3e4256ddb164b5847ef0112907e4d9e99c74035efe46c2', 16)
public_key1 = Point(secp256k1, x1, y1)
encoded_public_key1 = b'\x02' + x1.to_bytes(32, byteorder='big')
hashed_public_key1 = hashlib.sha256(encoded_public_key1).digest()
digest_public_key1 = hashlib.new('ripemd160', hashed_public_key1).digest()
funding_script1 = (OP_DUP + OP_HASH160 + OP_PUSH_20 + digest_public_key1 +
OP_EQUALVERIFY + OP_CHECKSIG)
raw_transaction_mod1 = (
'0200000002999422d4e2a72c7bd5890922129498b7b0e68141aadb6ec920b6baee57e2586a00000000'
+ reverse_byte_hex(hex(len(funding_script1))[2:]) +
funding_script1.hex() +
'feffffff999422d4e2a72c7bd5890922129498b7b0e68141aadb6ec920b6baee57e2586a01000000'
+ '00' +
'feffffff0286e75900000000001976a914f640fe9c961287aeceefe8499754aa4516c9a31c88acc00e1602000000001976a9140272b913f2755541abcdeeea8cb9845d615daa2b88acd9080800'
+ '01000000')
r2 = int(
'75dbfcbe3f05076ff6ad90525afec4e8ca110fb80555fc3c91d5f2d54f82ee2c', 16)
s2 = int(
'4a12501fd9704ae713ba2cd1500bca3e9cb34bb0bae145921c91ddce9c32017f', 16)
x2 = int(
'7940f42f1dbfc7af95ce0b8c9bc2565cc1b0b1e39924941dd07833a01e4f6d05', 16)
y2 = int(
'9c29c8439dc9e60b3d3809f7e9b648f3a78229801d691b581bd6492112154625', 16)
public_key2 = Point(secp256k1, x2, y2)
encoded_public_key2 = b'\x03' + x2.to_bytes(32, byteorder='big')
hashed_public_key2 = hashlib.sha256(encoded_public_key2).digest()
digest_public_key2 = hashlib.new('ripemd160', hashed_public_key2).digest()
funding_script2 = (OP_DUP + OP_HASH160 + OP_PUSH_20 + digest_public_key2 +
OP_EQUALVERIFY + OP_CHECKSIG)
raw_transaction_mod2 = (
'0200000002999422d4e2a72c7bd5890922129498b7b0e68141aadb6ec920b6baee57e2586a00000000'
+ '00' +
'feffffff999422d4e2a72c7bd5890922129498b7b0e68141aadb6ec920b6baee57e2586a01000000'
+ reverse_byte_hex(hex(len(funding_script2))[2:]) +
funding_script2.hex() +
'feffffff0286e75900000000001976a914f640fe9c961287aeceefe8499754aa4516c9a31c88acc00e1602000000001976a9140272b913f2755541abcdeeea8cb9845d615daa2b88acd9080800'
+ '01000000')
result1 = verify(bytes.fromhex(raw_transaction_mod1), (r1, s1),
public_key1, secp256k1, double_sha256)
result2 = verify(bytes.fromhex(raw_transaction_mod2), (r2, s2),
public_key2, secp256k1, double_sha256)
assert result1
assert result2
def send_utxos(coin, utxos, destination_address, satoshis, fee):
inputs = []
input_satoshis = 0
counter_inputs = 0
for utxo in utxos:
if not utxo:
continue
input_satoshis += utxo['satoshis']
inputs.append({
'transaction_id': reverse_byte_hex(utxo['txid']),
'output_index': utxo['vout'],
'locking_script': utxo['scriptPubKey'],
'satoshis': utxo['satoshis'],
'private_key': utxo.get('private_key'),
'unlocking_script': utxo.get('unlocking_script', '')
})
counter_inputs += 1
logger.debug('{}. address: {}, input: {}, satoshis: {}'.format(
counter_inputs, utxo['source_address'], utxo['txid'],
utxo['satoshis']))
if input_satoshis >= satoshis + fee:
return send_inputs(coin, inputs, destination_address,
utxo['source_address'], input_satoshis,
satoshis, fee)
else:
raise Exception(
'Not enough funds in addresses.\nSum of inputs is {} which is less than {} ({} + {})'
.format(input_satoshis, satoshis + fee, satoshis, fee))
def test_verify_one_input_zeit():
"""ZEIT transaction:
975e4d8a5530ba43dd607c62af925ad20a5347e2fd5873c65364bc4a89b6a829"""
r = int('5f69442b8ffd4ce39997c27a3f1c134a1ce6d1cdeb6dd39c5191d3e748419577',
16)
s = int('67d9c5b4144c80aac91701130686b66dc3da15799de960edb22ee9f90be6f554',
16)
x = int('771b0c5df5773a9c3f8da066d6b9e8e577025caeaa15ef1289c9e83050124eca',
16)
y = int('c71f2fe45289be22f857d721489e871dce3e7e6a951534f0504c5784c796def9',
16)
public_key = Point(secp256k1, x, y)
encoded_public_key = encode_point(public_key, compressed=True)
hashed_public_key = hashlib.sha256(encoded_public_key).digest()
digest_public_key = hashlib.new('ripemd160', hashed_public_key).digest()
funding_script = (OP_DUP + OP_HASH160 + OP_PUSH_20 + digest_public_key +
OP_EQUALVERIFY + OP_CHECKSIG)
raw_transaction_mod = (
'010000006bbc345b01ec2636bc0dc4a0fa774a1448b5cd26f90b1ebf6ab7474cb87b003dc15280043a00000000'
+ reverse_byte_hex(hex(len(funding_script))[2:]) +
funding_script.hex() +
'ffffffff016e2ae671000000001976a91415cdc3710d179a525dc6011f4588befc5a04ff4488ac00000000'
+ '01000000')
result = verify(bytes.fromhex(raw_transaction_mod), (r, s), public_key,
secp256k1, double_sha256)
assert result
def test_verify_one_input():
"""BTC transaction:
b2fcadebe12b9f8ec1820ef22e1e4fafb119876149bb9013a65dbc91c4921549"""
r = int('059c71db0d01d284fc4589c03b09947d21b98d7cefae614ac1039b6de0fa28ba',
16)
s = int('6cde9c0649fe2242b1dd90f40615e1bb247280b8f152c0ae9151b9c4d7abaf87',
16)
x = int('8cc516ad062ac55d5ed980c4f743a366621fa409060188df3c39e289720090ae',
16)
y = int('bba61faf69a3f2a39fac2745a565e5b2a4a9a5c90a71c9ee770135695231832c',
16)
public_key = Point(secp256k1, x, y)
encoded_public_key = (b'\x04' + x.to_bytes(32, byteorder='big') +
y.to_bytes(32, byteorder='big'))
hashed_public_key = hashlib.sha256(encoded_public_key).digest()
digest_public_key = hashlib.new('ripemd160', hashed_public_key).digest()
funding_script = (OP_DUP + OP_HASH160 + OP_PUSH_20 + digest_public_key +
OP_EQUALVERIFY + OP_CHECKSIG)
raw_transaction_mod = (
'020000000169ab945e88fc3d73d052e8c3ce546309a635458fea2c6b3e69981945b0d2a62201000000'
+ reverse_byte_hex(hex(len(funding_script))[2:]) +
funding_script.hex() +
'fdffffff025641e52d000000001976a914759d667709c9d1fbd7aa26537b5c441747d88f2588ac80c3c901000000001976a9146928f2f330f57e6916543481ab3af69597ae289d88ac06d70700'
+ '01000000')
result = verify(bytes.fromhex(raw_transaction_mod), (r, s), public_key,
secp256k1, double_sha256)
assert result
def __init__(self, coin, inputs, outputs, transaction_time=None, **params):
if transaction_time is None:
self.transaction_time = int(time.time()).to_bytes(4, byteorder='little')
else:
self.transaction_time = transaction_time
for input in inputs:
input['transaction_id'] = reverse_byte_hex(input['transaction_id'])
super().__init__(coin, inputs, outputs, **params)
def create(self):
if self.id:
raise Exception('Transaction {} already created'.format(self.id))
for i in range(len(self.inputs)):
self.sign_input(i)
raw_transaction_data = (
self.version +
self.inputs_counter +
self.get_encoded_inputs(position=range(len(self.inputs))) +
self.outputs_counter +
self.get_encoded_outputs() +
self.lock_time
)
self.id = reverse_byte_hex(double_sha256(raw_transaction_data).hexdigest())
self.raw = raw_transaction_data.hex()
logger.info('Created transaction with id: {}\nRaw data: {}'.format(
self.id, self.raw))
return self.raw
def send_utxos(coin, utxos, destination_address, satoshis, fee):
inputs = []
input_satoshis = 0
counter_inputs = 0
for utxo in utxos:
if not utxo:
continue
input_satoshis += utxo['satoshis']
inputs.append(
{
'transaction_id': reverse_byte_hex(utxo['txid']),
'output_index': utxo['vout'],
'locking_script': utxo['scriptPubKey'],
'satoshis': utxo['satoshis'],
'private_key': utxo.get('private_key'),
'unlocking_script': utxo.get('unlocking_script', ''),
}
)
counter_inputs += 1
logger.debug(
'%s. address: %s, input: %s, satoshis: %s',
counter_inputs,
utxo['source_address'],
utxo['txid'],
utxo['satoshis'],
)
if input_satoshis >= satoshis + fee:
return send_inputs(
coin,
inputs,
destination_address,
utxo['source_address'],
input_satoshis,
satoshis,
fee,
)
raise Exception(
f'Not enough funds in address(es).\n'
f'Sum of inputs is {input_satoshis} which is less than '
f'{satoshis + fee} ({satoshis} + {fee})'
)
def test_reverse_byte_hex(hex_str, reversed_hex_str):
assert reverse_byte_hex(hex_str) == reversed_hex_str