async def challenge(self, body, stream):
challenge = body.get('params', {}).get('token')
signed_challenge = TU.generate_signature(challenge,
self.config.private_key)
await self.write_result(
stream, 'authenticate', {
'peer': self.config.peer.to_dict(),
'signed_challenge': signed_challenge
}, body['id'])
async def create_relationship(self, bulletin_secret, username, to):
config = self.config
mongo = self.config.mongo
if not bulletin_secret:
return 'error: "bulletin_secret" missing', 400
if not username:
return 'error: "username" missing', 400
if not to:
return 'error: "to" missing', 400
rid = TU.generate_rid(config, bulletin_secret)
dup = mongo.db.blocks.find({'transactions.rid': rid})
if dup.count():
found_a = False
found_b = False
for txn in dup:
if txn['public_key'] == config.public_key:
found_a = True
if txn['public_key'] != config.public_key:
found_b = True
if found_a and found_b:
return json.dumps({
"success": False,
"status": "Already added"
})
miner_transactions = mongo.db.miner_transactions.find()
mtxn_ids = []
for mtxn in miner_transactions:
for mtxninput in mtxn['inputs']:
mtxn_ids.append(mtxninput['id'])
checked_out_txn_ids = mongo.db.checked_out_txn_ids.find()
for mtxn in checked_out_txn_ids:
mtxn_ids.append(mtxn['id'])
a = os.urandom(32).decode('latin1')
dh_public_key = scalarmult_base(a).encode('latin1').hex()
dh_private_key = a.encode('latin1').hex()
transaction = await Transaction.generate(
bulletin_secret=bulletin_secret,
username=username,
fee=0.00,
public_key=config.public_key,
dh_public_key=dh_public_key,
private_key=config.private_key,
dh_private_key=dh_private_key,
outputs=[{
'to': to,
'value': 0
}])
return transaction
async def post(self):
key_or_wif = self.get_secure_cookie("key_or_wif")
if not key_or_wif and self.jwt.get('key_or_wif') != 'true':
return self.render_as_json({'error': 'not authorized'})
args = json.loads(self.request.body)
if not args.get('uid'):
return self.render_as_json({
"error": True,
"message": "no user account provided"
})
keyhash = hashlib.sha256(
TU.generate_deterministic_signature(
self.config, 'child_wallet').encode()).hexdigest()
exkey = BIP32Key.fromExtendedKey(self.config.xprv)
last_child_key = self.config.mongo.db.child_keys.find(
{'signature': keyhash}, sort=[('inc', -1)])
inc = last_child_key.count() + 1
key = exkey.ChildKey(inc)
child_key = BIP32Key.fromExtendedKey(key.ExtendedKey())
child_key = child_key.ChildKey(inc)
public_key = child_key.PublicKey().hex()
address = str(
P2PKHBitcoinAddress.from_pubkey(bytes.fromhex(public_key)))
private_key = child_key.PrivateKey().hex()
wif = self.to_wif(private_key)
await self.config.mongo.async_db.child_keys.insert_one({
'account':
args.get('uid'),
'inc':
inc,
'extended':
child_key.ExtendedKey(),
'public_key':
public_key,
'address':
address,
'private_key':
private_key,
'wif':
wif,
'signature':
keyhash
})
return self.render_as_json({"address": address})
async def challenge(self, body, stream):
self.ensure_protocol_version(body, stream)
params = body.get('params', {})
challenge = params.get('token')
signed_challenge = TU.generate_signature(challenge,
self.config.private_key)
if stream.peer.protocol_version > 1:
await self.write_params(
stream, 'authenticate', {
'peer': self.config.peer.to_dict(),
'signed_challenge': signed_challenge
})
else:
await self.write_result(
stream, 'authenticate', {
'peer': self.config.peer.to_dict(),
'signed_challenge': signed_challenge
}, body['id'])
async def generate(
cls,
transactions=None,
public_key=None,
private_key=None,
force_version=None,
index=0,
force_time=None,
prev_hash=None,
nonce=None,
target=CHAIN.MAX_TARGET
):
config = get_config()
app_log = getLogger("tornado.application")
if force_version is None:
version = CHAIN.get_version_for_height(index)
else:
version = force_version
if force_time:
xtime = str(int(force_time))
else:
xtime = str(int(time.time()))
index = int(index)
if index == 0:
prev_hash = ''
elif prev_hash is None and index != 0:
prev_hash = LatestBlock.block.hash
transactions = transactions or []
transaction_objs = []
fee_sum = 0.0
used_sigs = []
used_inputs = {}
for txn in transactions:
try:
if isinstance(txn, Transaction):
transaction_obj = txn
else:
transaction_obj = Transaction.from_dict(txn)
if transaction_obj.transaction_signature in used_sigs:
print('duplicate transaction found and removed')
continue
await transaction_obj.verify()
used_sigs.append(transaction_obj.transaction_signature)
except:
raise InvalidTransactionException("invalid transactions")
try:
if int(index) > CHAIN.CHECK_TIME_FROM and (int(transaction_obj.time) > int(xtime) + CHAIN.TIME_TOLERANCE):
config.mongo.db.miner_transactions.remove({'id': transaction_obj.transaction_signature}, multi=True)
app_log.debug("Block embeds txn too far in the future {} {}".format(xtime, transaction_obj.time))
continue
if transaction_obj.inputs:
failed = False
used_ids_in_this_txn = []
for x in transaction_obj.inputs:
if config.BU.is_input_spent(x.id, transaction_obj.public_key):
failed = True
if x.id in used_ids_in_this_txn:
failed = True
if (x.id, transaction_obj.public_key) in used_inputs:
failed = True
used_inputs[(x.id, transaction_obj.public_key)] = transaction_obj
used_ids_in_this_txn.append(x.id)
if failed:
continue
transaction_objs.append(transaction_obj)
fee_sum += float(transaction_obj.fee)
except Exception as e:
await config.mongo.async_db.miner_transactions.delete_many({'id': transaction_obj.transaction_signature})
config.app_log.debug('Exception {}'.format(e))
continue
block_reward = CHAIN.get_block_reward(index)
coinbase_txn = await Transaction.generate(
public_key=public_key,
private_key=private_key,
outputs=[{
'value': block_reward + float(fee_sum),
'to': str(P2PKHBitcoinAddress.from_pubkey(bytes.fromhex(public_key)))
}],
coinbase=True
)
transaction_objs.append(coinbase_txn)
transactions = transaction_objs
block = await cls.init_async(
version=version,
block_time=xtime,
block_index=index,
prev_hash=prev_hash,
transactions=transactions,
public_key=public_key,
target=target
)
txn_hashes = block.get_transaction_hashes()
block.set_merkle_root(txn_hashes)
block.target = target
block.header = block.generate_header()
if nonce:
block.nonce = str(nonce)
block.hash = block.generate_hash_from_header(
block.index,
block.header,
str(block.nonce)
)
block.signature = TU.generate_signature(block.hash, private_key)
return block
async def post(self):
key_or_wif = self.get_secure_cookie("key_or_wif")
if not key_or_wif and self.jwt.get('key_or_wif') != 'true':
return self.render_as_json({'error': 'not authorized'})
config = self.config
mongo = self.config.mongo
body = json.loads(self.request.body.decode('utf-8'))
try:
fg = FastGraph.from_dict(0, body.get('txn'), raw=True)
fg.verify()
except:
raise
return 'invalid transaction', 400
res = mongo.db.signed_transactions.find_one({'hash': body.get('hash')})
if res:
return 'no', 400
try:
rid = TU.generate_rid(config, body.get('bulletin_secret'))
my_entry_for_relationship = GU().get_transaction_by_rid(
rid,
config.wif,
rid=True,
my=True,
public_key=config.public_key)
their_entry_for_relationship = GU().get_transaction_by_rid(
rid,
rid=True,
raw=True,
theirs=True,
public_key=config.public_key)
verified = verify_signature(
base64.b64decode(body.get('bulletin_secret')),
my_entry_for_relationship['relationship']
['their_username'].encode(),
bytes.fromhex(their_entry_for_relationship['public_key']))
if not verified:
return 'no', 400
verified = verify_signature(
base64.b64decode(body.get('id')),
body.get('hash').encode('utf-8'),
bytes.fromhex(their_entry_for_relationship['public_key']))
address = str(
P2PKHBitcoinAddress.from_pubkey(
bytes.fromhex(their_entry_for_relationship['public_key'])))
found = False
async for x in self.config.BU.get_wallet_unspent_transactions(
address, [body.get('input')]):
if body.get('input') == x['id']:
found = True
if not found:
for x in self.config.BU.get_wallet_unspent_fastgraph_transactions(
address):
if body.get('input') == x['id']:
found = True
if found:
signature = mongo.db.signed_transactions.find_one({
'input':
body.get('input'),
'txn.public_key':
body['txn']['public_key']
})
if signature:
already_spent = mongo.db.fastgraph_transactions.find_one({
'txn.inputs.id':
body['input'],
'txn.public_key':
body['txn']['public_key']
})
if already_spent:
self.set_status(400)
self.write('already spent!')
self.finish()
return True
else:
signature['txn']['signatures'] = [
signature['signature']
]
fastgraph = FastGraph.from_dict(0, signature['txn'])
try:
fastgraph.verify()
except Exception as e:
raise
return 'did not verify', 400
result = mongo.db.fastgraph_transactions.find_one(
{'txn.hash': fastgraph.hash})
if result:
return 'duplicate transaction found', 400
spent_check = mongo.db.fastgraph_transactions.find_one(
{
'txn.inputs.id': {
'$in': [x.id for x in fastgraph.inputs]
}
})
if spent_check:
return 'already spent input', 400
fastgraph.save()
else:
return 'no transactions with this input found', 400
if verified:
transaction_signature = TU.generate_signature_with_private_key(
config.private_key, body.get('hash'))
signature = {
'signature': transaction_signature,
'hash': body.get('hash'),
'bulletin_secret': body.get('bulletin_secret'),
'input': body.get('input'),
'id': body.get('id'),
'txn': body.get('txn')
}
mongo.db.signed_transactions.insert(signature)
if '_id' in signature:
del signature['_id']
self.render_as_json(signature, indent=4)
else:
return 'no', 400
except Exception as e:
raise
self.render_as_json({'status': 'error', 'msg': e})
def generate_transaction_signature(self):
return TU.generate_signature(self.hash, self.private_key)
async def generate(cls,
bulletin_secret='',
username='',
value=0,
fee=0.0,
rid='',
requester_rid='',
requested_rid='',
public_key='',
dh_public_key='',
private_key='',
dh_private_key='',
to='',
inputs='',
outputs='',
coinbase=False,
chattext=None,
signin=None,
relationship='',
no_relationship=False,
exact_match=False):
cls_inst = cls()
cls_inst.config = get_config()
cls_inst.mongo = cls_inst.config.mongo
cls_inst.app_log = getLogger('tornado.application')
cls_inst.bulletin_secret = bulletin_secret
cls_inst.username = username
cls_inst.rid = rid
cls_inst.requester_rid = requester_rid
cls_inst.requested_rid = requested_rid
cls_inst.public_key = public_key
cls_inst.dh_public_key = dh_public_key
cls_inst.private_key = private_key
cls_inst.value = value
cls_inst.fee = float(fee)
cls_inst.dh_private_key = dh_private_key
cls_inst.to = to
cls_inst.time = str(int(time.time()))
cls_inst.outputs = []
cls_inst.relationship = relationship
cls_inst.no_relationship = no_relationship
cls_inst.exact_match = exact_match
for x in outputs:
cls_inst.outputs.append(Output.from_dict(x))
cls_inst.inputs = []
for x in inputs:
if 'signature' in x and 'public_key' in x and 'address' in x:
cls_inst.inputs.append(ExternalInput.from_dict(x))
else:
cls_inst.inputs.append(Input.from_dict(x))
cls_inst.coinbase = coinbase
cls_inst.chattext = chattext
cls_inst.signin = signin
await cls_inst.do_money()
inputs_concat = ''.join([
x.id for x in sorted(cls_inst.inputs, key=lambda x: x.id.lower())
])
outputs_concat = cls_inst.get_output_hashes()
if bulletin_secret or rid:
if not cls_inst.rid:
cls_inst.rid = cls_inst.generate_rid()
if cls_inst.chattext:
cls_inst.relationship = json.dumps(
{"chatText": cls_inst.chattext})
cls_inst.encrypted_relationship = cls_inst.config.cipher.encrypt(
cls_inst.relationship)
elif cls_inst.signin:
for shared_secret in cls_inst.config.GU.get_shared_secrets_by_rid(
cls_inst.rid):
cls_inst.relationship = SignIn(cls_inst.signin)
cls_inst.cipher = Crypt(shared_secret.hex(), shared=True)
cls_inst.encrypted_relationship = cls_inst.cipher.shared_encrypt(
cls_inst.relationship.to_json())
break
elif cls_inst.relationship:
cls_inst.encrypted_relationship = cls_inst.relationship
elif cls_inst.no_relationship:
cls_inst.encrypted_relationship = ''
else:
if not cls_inst.dh_public_key or not cls_inst.dh_private_key:
a = os.urandom(32).decode('latin1')
cls_inst.dh_public_key = scalarmult_base(a).encode(
'latin1').hex()
cls_inst.dh_private_key = a.encode().hex()
cls_inst.relationship = cls_inst.generate_relationship()
if not private_key:
raise Exception('missing private key')
cls_inst.encrypted_relationship = cls_inst.config.cipher.encrypt(
cls_inst.relationship.to_json().encode())
else:
cls_inst.rid = ''
cls_inst.encrypted_relationship = ''
cls_inst.header = (cls_inst.public_key + cls_inst.time +
cls_inst.dh_public_key + cls_inst.rid +
cls_inst.encrypted_relationship +
"{0:.8f}".format(cls_inst.fee) +
cls_inst.requester_rid + cls_inst.requested_rid +
inputs_concat + outputs_concat)
cls_inst.hash = hashlib.sha256(
cls_inst.header.encode('utf-8')).digest().hex()
if cls_inst.private_key:
cls_inst.transaction_signature = TU.generate_signature_with_private_key(
private_key, cls_inst.hash)
else:
cls_inst.transaction_signature = ''
return cls(cls_inst.time,
cls_inst.rid,
cls_inst.transaction_signature,
cls_inst.encrypted_relationship,
cls_inst.public_key,
cls_inst.dh_public_key,
float(cls_inst.fee),
cls_inst.requester_rid,
cls_inst.requested_rid,
cls_inst.hash,
inputs=[x.to_dict() for x in cls_inst.inputs],
outputs=[x.to_dict() for x in cls_inst.outputs],
coinbase=cls_inst.coinbase)
def get_username_signature(self):
from yadacoin.core.transactionutils import TU
return TU.generate_deterministic_signature(self, self.username,
self.private_key)
