def sign_message_with_transaction(transaction, key):
"""
Signs a transaction message or transaction
:param transaction dict:
:param key str: A signing key
returns message, txnid tuple: The first 16 characters
of a sha256 hexdigest.
"""
transaction['Nonce'] = time.time()
pub = pybitcointools.encode_pubkey(pybitcointools.privkey_to_pubkey(key),
"hex")
transaction["public_key"] = pub
sig = pybitcointools.ecdsa_sign(
dict2cbor(transaction),
key
)
transaction['Signature'] = sig
txnid = hashlib.sha256(transaction['Signature']).hexdigest()[:16]
message = {
'Transaction': transaction,
'__TYPE__': "/mktplace.transactions.MarketPlace/Transaction",
'__NONCE__': time.time(),
}
cbor_serialized_mess = dict2cbor(message)
signature = pybitcointools.ecdsa_sign(
cbor_serialized_mess,
key
)
message['__SIGNATURE__'] = signature
return message, txnid
def _sign_message_with_transaction(transaction, message_type, key):
"""
Signs a transaction message or transaction
:param transaction (dict):
:param key (str): A signing key
returns message, txnid (tuple): The first 16 characters
of a sha256 hexdigest.
"""
transaction['Nonce'] = time.time()
pub = pybitcointools.encode_pubkey(pybitcointools.privkey_to_pubkey(key),
"hex")
transaction["public_key"] = pub
sig = pybitcointools.ecdsa_sign(_dict2cbor(transaction), key)
transaction['Signature'] = sig
txnid = hashlib.sha256(transaction['Signature']).hexdigest()[:16]
message = {
'Transaction': transaction,
'__TYPE__': message_type,
'__NONCE__': time.time(),
}
cbor_serialized_message = _dict2cbor(message)
signature = pybitcointools.ecdsa_sign(cbor_serialized_message, key)
message['__SIGNATURE__'] = signature
return message, txnid
def do_generate(args):
private_key = pybitcointools.random_key()
public_key = pybitcointools.encode_pubkey(
pybitcointools.privkey_to_pubkey(private_key), "hex")
words = generate_word_list(args.pool_size)
batches = []
start = time.time()
total_txn_count = 0
for i in xrange(0, args.count):
txns = []
for _ in xrange(0, random.randint(1, args.batch_max_size)):
txn = create_intkey_transaction(
verb=random.choice(['set', 'inc', 'dec']),
name=random.choice(words),
value=random.randint(0, 100000),
private_key=private_key,
public_key=public_key)
total_txn_count += 1
txns.append(txn)
batch = create_batch(
transactions=txns,
private_key=private_key,
public_key=public_key)
batches.append(batch)
if i % 100 == 0 and i != 0:
stop = time.time()
txn_count = 0
for batch in batches[-100:]:
txn_count += len(batch.transactions)
fmt = 'batches {}, batch/sec: {:.2f}, txns: {}, txns/sec: {:.2f}'
print fmt.format(
str(i),
100 / (stop - start),
str(total_txn_count),
txn_count / (stop - start))
start = stop
batch_list = batch_pb2.BatchList(batches=batches)
print "Writing to {}...".format(args.output)
with open(args.output, "w") as fd:
fd.write(batch_list.SerializeToString())
def test_is_valid_pub_key(self):
pubkey = pybitcointools.privkey_to_pubkey("5KQ4iQQGgbQX9MmfiPUwwHBL1R"
"GPa86NwFbqrWoodjuzruqFVDd")
pub = pybitcointools.encode_pubkey(pubkey, "hex")
minfo = {'Nonce': 100, 'public_key': pub,
'TransactionType': '/Transaction', 'Dependencies': []}
sig = pybitcointools.ecdsa_sign(
signed_object.dict2cbor(minfo),
"5KQ4iQQGgbQX9MmfiPUwwHBL1RGPa86NwFbqrWoodjuzruqFVDd"
)
# Create valid transaction
minfo["Signature"] = sig
temp = Transaction(minfo)
self.assertTrue(temp.is_valid("unused"))
# Change transaction after it was signed
minfo["Nonce"] = time.time()
temp = Transaction(minfo)
self.assertFalse(temp.is_valid("unused"))
def test_is_valid_pub_key(self):
pubkey = pybitcointools.privkey_to_pubkey("5KQ4iQQGgbQX9MmfiPUwwHBL1R"
"GPa86NwFbqrWoodjuzruqFVDd")
pub = pybitcointools.encode_pubkey(pubkey, "hex")
minfo = {
'Nonce': 100,
'public_key': pub,
'TransactionType': '/Transaction',
'Dependencies': []
}
sig = pybitcointools.ecdsa_sign(
signed_object.dict2cbor(minfo),
"5KQ4iQQGgbQX9MmfiPUwwHBL1RGPa86NwFbqrWoodjuzruqFVDd")
# Create valid transaction
minfo["Signature"] = sig
temp = Transaction(minfo)
self.assertTrue(temp.is_valid("unused"))
# Change transaction after it was signed
minfo["Nonce"] = time.time()
temp = Transaction(minfo)
self.assertFalse(temp.is_valid("unused"))
def do_generate(args):
private_key = pybitcointools.random_key()
public_key = pybitcointools.encode_pubkey(
pybitcointools.privkey_to_pubkey(private_key), "hex")
words = generate_word_list(args.pool_size)
txns = []
batches = []
bytecode = ""
with open(args.contract, "rb") as fd:
byte = fd.readline()
while byte != "":
bytecode += byte
byte = fd.readline()
byte_addr = get_address("jvm_sc", bytecode)
txn = create_jvm_sc_transaction(verb='store',
private_key=private_key,
public_key=public_key,
bytecode=bytecode,
methods=["set", "inc", "dec"])
txns.append(txn)
keys = []
addresses = []
for i in range(20):
if len(txns) < 10:
key = random.choice(words)
keys.append(key)
value = str(random.randint(0, 1000))
key_addr = get_address("intkey", key)
addresses.append(key_addr)
txn = create_jvm_sc_transaction(verb='run',
private_key=private_key,
public_key=public_key,
byte_addr=byte_addr,
method="set",
parameters=[
"key," + key, "value," + value,
"&check," + key_addr
],
addresses=addresses)
txns.append(txn)
addresses = []
else:
batch = create_batch(txns, private_key, public_key)
batches.append(batch)
txns = []
for i in range(20):
if len(txns) < 10:
key = random.choice(keys)
key_addr = get_address("intkey", key)
addresses.append(key_addr)
txn = create_jvm_sc_transaction(
verb='run',
private_key=private_key,
public_key=public_key,
byte_addr=byte_addr,
method=random.choice(["inc", "dec"]),
parameters=["key," + key, "&value," + key_addr, "diff,2"],
addresses=addresses)
txns.append(txn)
addresses = []
else:
batch = create_batch(txns, private_key, public_key)
batches.append(batch)
txns = []
batch_list = batch_pb2.BatchList(batches=batches)
print "Writing to {}...".format(args.output)
with open(args.output, "w") as fd:
fd.write(batch_list.SerializeToString())
# It requires less computation and less space in the blockchain. # THE UNCOMPRESSED KEY # # Although the private key in this demonstration was statically defined, we will generate # the public key on the fly. We'll use pybitcointools library by Vitalik. # # Sorry guys but we won't discuss in this demo how Elliptic Curve Cryptography works, nor # how to generate an ECDSA public key. Although, you are invited to take a look at how # pybitcointools generates it. # # The following is the uncompressed 65 bytes public key, in hex encoding # Why 65 bytes? The actual ECDSA public key is 64 bytes, but bitcoin protocol adds a prefix # to indicate if its uncompressed or compressed. In this case a "04" prefix. # That extra "04" is 1 byte. public_key_version = pybitcointools.privkey_to_pubkey(private_key_hex) # This will generate the hashed uncompressed public key, # that is, the "bitcoin address" that you share with others. # Again, the uncompressed format is not recommended anymore. # # The sharable bitcoin address: public_address_uncompressed = utils.public_address(public_key_version) # THE COMPRESSED KEY # Compressed keys only specify the x coordinate plus an 1 byte # flag indicating which side of the symmetrical curve the point is on, which allows y to be derived. # In order to indicate that key is compressed, "02" or "03" prefix is added to the encoded hex value. # The "02" and "03" is determined based on the the elliptic curve equation result. # # Public key with compression (32 bytes + 1 byte prefix = 33 bytes), in hex encoding
def do_generate(args):
private_key = pybitcointools.random_key()
public_key = pybitcointools.encode_pubkey(
pybitcointools.privkey_to_pubkey(private_key), "hex")
words = generate_word_list(args.pool_size)
txns = []
batches = []
bytecode = ""
with open(args.contract, "rb") as fd:
byte = fd.readline()
while byte != "":
bytecode += byte
byte = fd.readline()
byte_addr = get_address("jvm_sc", bytecode)
txn = create_jvm_sc_transaction(
verb='store',
private_key=private_key,
public_key=public_key,
bytecode=bytecode,
methods=["set", "inc", "dec"])
txns.append(txn)
keys = []
addresses = []
for i in range(20):
if len(txns) < 10:
key = random.choice(words)
keys.append(key)
value = str(random.randint(0, 1000))
key_addr = get_address("intkey", key)
addresses.append(key_addr)
txn = create_jvm_sc_transaction(
verb='run',
private_key=private_key,
public_key=public_key,
byte_addr=byte_addr,
method="set",
parameters=["key," + key, "value," + value,
"&check," + key_addr],
addresses=addresses)
txns.append(txn)
addresses = []
else:
batch = create_batch(txns, private_key, public_key)
batches.append(batch)
txns = []
for i in range(20):
if len(txns) < 10:
key = random.choice(keys)
key_addr = get_address("intkey", key)
addresses.append(key_addr)
txn = create_jvm_sc_transaction(
verb='run',
private_key=private_key,
public_key=public_key,
byte_addr=byte_addr,
method=random.choice(["inc", "dec"]),
parameters=["key," + key, "&value," + key_addr, "diff,2"],
addresses=addresses)
txns.append(txn)
addresses = []
else:
batch = create_batch(txns, private_key, public_key)
batches.append(batch)
txns = []
batch_list = batch_pb2.BatchList(batches=batches)
print "Writing to {}...".format(args.output)
with open(args.output, "w") as fd:
fd.write(batch_list.SerializeToString())