def test_transaction_creation(self):
# Create transaction and check if used ordered dict
t = Transaction("1234", "4567")
o_dict = OrderedDict({"addr_from": "1234"})
o_dict["addr_to"] = "4567"
self.assertTrue(type(t.get_json()) == type(o_dict))
self.assertDictEqual(t.get_json(), o_dict)
def get_by_account_id(self, account_id: str, parent: str = None) -> List[Transaction]:
coll_ref = self.collection_ref
if parent:
coll_ref = db.collection(parent + '/' + self.collection_name)
transactions = coll_ref.where('account_id', '==', account_id).stream()
return [Transaction(**doc.to_dict()) for doc in transactions if doc.to_dict()]
def validate_transaction(self, transaction):
"""
Validate that a transaction signature corresponds to the provided data
"""
t_sig = b64decode(transaction["signature"].encode())
pubkey = b64decode(transaction["pubkey"].encode())
verifier = PKCS1_v1_5.new(RSA.importKey(pubkey))
digest = SHA256.new()
t = Transaction(transaction["addr_from"], transaction["addr_to"])
digest.update(str(t.get_json()).encode())
verified = verifier.verify(digest, t_sig)
if verified:
return True
else:
logger.info("Signature is invalid")
return False
def _create_tx_to_miner(cls, block, miner_address):
tx_amount_to_miner = block.get_tx_amount_to_miner()
transaction = Transaction.build_for_miner(
timestamp=datetime.now().timestamp(),
amount=tx_amount_to_miner,
miner_address=miner_address)
UnconfirmedTxPool.create_transaction(transaction)
return transaction
def get(self, id: UUID) -> Transaction:
doc_ref = self.collection_ref.document(str(id))
doc = doc_ref.get()
if doc.exists:
return Transaction(**doc.to_dict())
return None
def list():
"""
Show all transactions on a list.
"""
return render_template(
"transaction/list.html",
transactions = Transaction.get_all_for_list()
)
def decode_transaction(dictionary):
return Transaction(transaction_id=dictionary['transaction_id'],
tx_inputs=list(
map(lambda tx_i: decode_tx_input(tx_i),
dictionary['tx_inputs'])),
tx_outputs=list(
map(lambda tx_o: decode_tx_output(tx_o),
dictionary['tx_outputs'])))
def test_block_creation(self):
# Create genesis transaction
transaction = Transaction("Genesis Addr", "Genesis Block")
key = RSA.generate(1024)
miner_id = "1234"
# Create genesis block with genesis transaction, signing it
genesis = Block("Genesis Block", 0, [transaction.get_signed_json(key)],
miner_id)
self.assertDictEqual(
genesis.get_json(), {
"miner": miner_id,
"hash": "",
"prevHash": "Genesis Block",
"height": 0,
"nonce": 0,
"data": [transaction.get_signed_json(key)]
})
async def create(*, transaction: TransactionSchemaCreate):
crud.wallet.get(id=transaction.wallet_id, error_out=True)
crud.category.get(id=transaction.category_id, error_out=True)
date_tran = datetime.strptime(transaction.date_tran, '%d/%m/%Y').date()
db_transaction = Transaction(amount=transaction.amount,
description=transaction.description,
date_tran=date_tran,
category_id=transaction.category_id,
wallet_id=transaction.wallet_id)
db_transaction = crud.transaction.create(obj_in=db_transaction)
return {"data": db_transaction}
def update_transaction(cls, user_id, symbol, volume, price, total,
txttype):
transaction = Transaction(user_id=user_id,
symbol=symbol,
volume=volume,
stock_price=price,
total_price=total,
datetime=datetime.now(),
txntype=txttype)
db.session.add(transaction)
db.session.commit()
def create_and_add_transaction(self, addr_to):
"""
Used to make a transaction from current node to another
"""
logger.info("Add transaction to pool")
if self.has_to_vote():
if self.check_valid_address(addr_to):
transaction = Transaction(self.miner_id, addr_to)
self.blockchain.add_transaction_to_pool(
transaction.get_signed_json(self.private_key))
self.propagate_transaction(
transaction.get_signed_json(self.private_key))
if len(self.sched.get_jobs()) == 0:
logger.info("Start block schedule")
self.sched.add_job(self.create_and_add_block,
'date',
run_date=datetime.now() +
timedelta(seconds=5))
else:
logger.error("Cannot vote for this ledger, check the address")
def details(id):
"""
Show basic information of one transaction.
"""
transaction = Transaction.get_transaction_details(id)
if not transaction:
abort(404)
return render_template(
"transaction/details.html",
transaction = transaction
)
def test_block_validation(self):
chain = Blockchain()
private_key = RSA.generate(1024)
miner_id = "1234"
chain.create_genesis_block(private_key, miner_id)
prevBlock = chain.storage[0]
t = Transaction("1234", "4567")
# Create Block with dummy transaction
block = Block(prevBlock["hash"], prevBlock["height"] + 1,
[t.get_signed_json(private_key)], miner_id)
block.mine()
# Check block validation is ok
self.assertTrue(chain.validate_block(block.get_json(), prevBlock))
# Mess with blockchain structure
block.block["prevHash"] = "00012345"
self.assertFalse(chain.validate_block(block.get_json(), prevBlock))
# Mess with height
block.block["prevHash"] = prevBlock["hash"]
block.block["height"] = 5
self.assertFalse(chain.validate_block(block.get_json(), prevBlock))
# Mess with PoW
block.block["height"] = 2
block.block["hash"] = "0111111111"
self.assertFalse(chain.validate_block(block.get_json(), prevBlock))
# Mess with hash but keep PoW
block.block["hash"] = "0001111111"
self.assertFalse(chain.validate_block(block.get_json(), prevBlock))
# Mess with transaction integrity
t.signature = "L7TBH0ahox4GOAdF8om2ijbNVPcO3Ys6+KdvfFhvfX/SysetaJw+0rlU6VMuzwB0rQ/X2+ioAdtXcstutSeRAfZTYP+utaNFL1nP48as/C6mca4sp+ya39AWWLIUuZeGMit9kSUavx6uX5cSAuqXB4tcK/bUSVghtMC9vG4JyC8="
block = Block(prevBlock["prevHash"], prevBlock["height"] + 1,
[t.get_signed_json(private_key)], miner_id)
block.mine()
self.assertFalse(chain.validate_block(block.get_json(), prevBlock))
def decode_transaction(dictionary):
if dictionary['transaction_outputs'] is not None:
transaction_outputs = decode_transaction_outputs(dictionary['transaction_outputs'])
else:
transaction_outputs = None
if dictionary['transaction_inputs'] is not None:
transaction_inputs = decode_transaction_inputs(dictionary['transaction_inputs'])
else:
transaction_inputs = None
return Transaction(
transaction_id = dictionary['transaction_id'],
block_id = dictionary['block_id'],
locktime = dictionary['locktime'],
transaction_inputs = transaction_inputs,
transaction_outputs = transaction_outputs
)
def _create_transaction_to_miner(cls):
transaction_inputs = list(map(
lambda tx_o: tx_o.to_input(''), TransactionOutput.list_unspent(COINBASE_ADDRESS)
))
transaction_input_amounts = list(map(lambda tx_i: tx_i.transaction_output.amount, transaction_inputs))
if len(transaction_inputs) == 0:
transaction_input_amount_sum = Decimal(0)
else:
transaction_input_amount_sum = Decimal(reduce((lambda x, y: x + y), transaction_input_amounts))
transaction = Transaction.build(
block_id = None,
locktime = 0,
timestamp = datetime.now().timestamp()
)
transaction_output_to_miner = TransactionOutput.build(
transaction_id = transaction.transaction_id,
amount = transaction_input_amount_sum * Decimal(0.99),
sender_address = COINBASE_ADDRESS,
recipient_address = cls.MINER_ADDRESS,
timestamp = datetime.now().timestamp()
)
transaction_output_to_coinbase = TransactionOutput.build(
transaction_id = transaction.transaction_id,
amount = transaction_input_amount_sum * Decimal(0.99),
sender_address = COINBASE_ADDRESS,
recipient_address = COINBASE_ADDRESS,
timestamp = datetime.now().timestamp()
)
transaction.transaction_inputs = transaction_inputs
transaction.transaction_outputs = [transaction_output_to_miner, transaction_output_to_coinbase]
UnconfirmedTransactionPool.transactions.append(transaction)
return transaction
def test_transaction_signature(self):
# Create transaction
t = Transaction("1234", "4567")
# Create Private Key
key = RSA.generate(1024)
# Sign transaction and recover complete transaction JSON
signed_json = t.get_signed_json(key)
# Verify signature and public key match
t_sig = b64decode(signed_json["signature"].encode())
pubkey = b64decode(signed_json["pubkey"].encode())
verifier = PKCS1_v1_5.new(RSA.importKey(pubkey))
digest = SHA256.new()
t = Transaction(signed_json["addr_from"], signed_json["addr_to"])
digest.update(str(t.get_json()).encode())
self.assertTrue(verifier.verify(digest, t_sig))
def seed(cls):
timestamp = 0
block = Block.build(block_number=1,
version='1',
previous_block_hash='1',
timestamp=1,
merkle_root='',
difficulty_target=10,
nonce=1)
transaction = Transaction.build(block_id='1',
locktime=0,
timestamp=timestamp)
transaction_output = TransactionOutput.build(
transaction_id='1',
amount=10000000000000000000,
sender_address='coinbase',
recipient_address=
'-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAznjoHvzCJtQcIYd3yj7v\ngwaPlyiG6U/Qlw1G89n0bNt5anvRe+e2eKzvpy98aj6ShGu7hARE9SxAFA9bIHCB\nqdAyPnrUaw7qGkeZNPHBByHe9prJSn0ZwBtfySOSbzdetO5aAwvLj5qMudW2PDz1\n5mP2taGOvXqNnbcH78ZHQLvF6G+SbwuLHU5LEDSZlcy+CnvPqD67cg+QmJLneVmQ\nfOBtbFHz3yDQghNrHWa+UCspUMHVGsDG6OEK7MSpPieY6TzBEYQWsikosQ+V0zBN\nrSCADe3GBcJ7XzafM/gb+gzJ1eP78F1sA6Ja4ZtqInqN406PwerAXaUJa2twW652\n9wIDAQAB\n-----END PUBLIC KEY-----',
timestamp=timestamp)
db.session.add(block)
db.session.add(transaction)
db.session.add(transaction_output)
db.session.commit()
def create_transaction(cls, tx_request):
# 使用としているトランザクションアウトプットIDが既に未承認のトランザクションアウトプットIDに含まれていたら例外を投げる
spent_tx_output_ids_in_unconfirmed_tx_pool = UnconfirmedTxPool.list_spent_tx_output_ids()
tx_request.assert_unspent_tx_output_ids(spent_tx_output_ids_in_unconfirmed_tx_pool)
unspent_tx_outputs_in_blockchain = Blockchain.fetch_unspent_tx_outputs_by_tx_output_ids(
tx_request.get_requesting_tx_output_ids())
# 今回使用しようとしているトランザクションインプットを算出
tx_inputs = tx_request.get_tx_inputs(unspent_tx_outputs_in_blockchain)
TransactionInput.verify_tx_inputs(tx_inputs, tx_request.sender_address)
transaction = Transaction.build_with_tx_outputs(
timestamp = tx_request.timestamp,
tx_inputs = tx_inputs,
request_amount = tx_request.amount,
sender_address = tx_request.sender_address,
recipient_address = tx_request.recipient_address
)
UnconfirmedTxPool.transactions.append(transaction)
return transaction
def transfer(id):
"""
Depending on request type, either (1) show form for recording a transaction,
or (2) create new transaction, and update 'current owner' field on the
certificate. Refuse to do anything if the certificate in question already
has been canceled.
"""
c = Certificate.query.get_or_404(id)
if c.canceled_on:
notify.is_already_canceled("certificate")
return redirect(url_for("certificate.details", id=id))
f = TransactionForm(request.form)
f.buyer_id.choices = Shareholder.get_dropdown_options()
if f.validate_on_submit():
t = Transaction()
f.populate_obj(t)
c.owner_id = f.buyer_id.data
t.price = int(100 * t.price)
t.price_per_share = int(t.price / c.share_count)
t.save_or_update()
notify.create_ok("transaction")
return redirect(url_for("certificate.details", id=id))
elif request.method == "POST":
notify.invalid_input()
else:
f.certificate_id.data = id
f.shares.data = c.get_title()
f.seller_id.data = c.owner_id
f.seller.data = Certificate.get_current_owner(id).get("name")
f.last_transaction.data = Certificate.get_last_transaction_date(id) \
or c.issued_on
return render_template("transaction/form.html", form=f)
def create_transaction(cls, request):
transaction_input_dicts = request['transaction_inputs']
sender_address = request['sender_address']
recipient_address = request['recipient_address']
request_amount = request['amount']
timestamp = request['timestamp']
unspent_transaction_outputs = list(
filter(
lambda tx_output: tx_output['tx_o'] is not None,
list(
map(
lambda tx_input: {
'tx_o':
TransactionOutput.find_unspent(tx_input[
'transaction_output_id']),
'unlocking_script':
tx_input['unlocking_script']
}, transaction_input_dicts))))
transaction_inputs = list(
map(
lambda tx_output: tx_output['tx_o'].to_input(tx_output[
'unlocking_script']), unspent_transaction_outputs))
verify_results = list(
map(lambda input: input.verify(sender_address),
transaction_inputs))
if False in verify_results:
raise Exception('error.cant_verify_input')
if len(transaction_inputs) == 0:
raise Exception('error.not_enough_input_amount')
transaction_input_amounts = list(
map(lambda input: input.transaction_output.amount,
transaction_inputs))
transaction_input_amount_sum = reduce((lambda x, y: x + y),
transaction_input_amounts)
if request_amount > transaction_input_amount_sum:
raise Exception('error.not_enough_input_amount')
to_sender_amount = request_amount * 0.99
transaction = Transaction.build(block_id=None,
locktime=0,
timestamp=timestamp)
to_sender_transaction_output = TransactionOutput.build(
transaction_id=transaction.transaction_id,
amount=to_sender_amount,
sender_address=sender_address,
recipient_address=recipient_address,
timestamp=timestamp)
to_coinbase_amount = TransactionOutput.build(
transaction_id=transaction.transaction_id,
amount=request_amount - to_sender_amount,
sender_address=sender_address,
recipient_address=COINBASE_ADDRESS,
timestamp=timestamp)
to_recipient_amount = TransactionOutput.build(
transaction_id=transaction.transaction_id,
amount=transaction_input_amount_sum - request_amount,
sender_address=sender_address,
recipient_address=sender_address,
timestamp=timestamp)
transaction_outputs = [
to_sender_transaction_output, to_coinbase_amount,
to_recipient_amount
]
transaction.transaction_outputs = transaction_outputs
transaction.transaction_inputs = transaction_inputs
UnconfirmedTransactionPool.transactions.append(transaction)
return transaction
def setUp(self):
self.transaction = Transaction("Sainsbury's", "Groceries", 4.59)
def list(self) -> List[Transaction]:
todos_ref = self.collection_ref
return [Transaction(**doc.get().to_dict()) for doc in todos_ref.list_documents() if doc.get().to_dict()]
else:
log.debug("{}-db schema up to date".format(table.name))
data_base.metadata.create_all(engine)
if reset_blocks:
data_db().query(Block).delete()
return data_db
def check_table_ddl_against_model(database, table) -> bool:
if database.bind.name == "sqlite":
db_table_ddl = database().execute(
"select sql from sqlite_master where type = 'table' and name = '{}'"
.format(table.name)).scalar()
else:
raise Exception("Unsupported database dialect:{}".format(
database.bind.name))
return str.strip(CreateTable(table).compile(
database.bind).string) == str.strip(db_table_ddl or '')
if __name__ == '__main__':
import app.helpers
app.helpers.init_logging()
init_profile_db()
init_data_db()
for t in Transaction.select():
print(t)
class Blockchain:
blocks = [
Block.build(
block_number=1,
previous_block_hash="1",
timestamp=0,
merkle_root="",
difficulty_target=20,
nonce=0,
transactions=[
Transaction.build(
timestamp=1,
tx_inputs=[],
tx_outputs=[
TransactionOutput.build(
amount=1000000000,
sender_address=COINBASE_ADDRESS,
recipient_address=
"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAznjoHvzCJtQcIYd3yj7vgwaPlyiG6U/Qlw1G89n0bNt5anvRe+e2eKzvpy98aj6ShGu7hARE9SxAFA9bIHCBqdAyPnrUaw7qGkeZNPHBByHe9prJSn0ZwBtfySOSbzdetO5aAwvLj5qMudW2PDz15mP2taGOvXqNnbcH78ZHQLvF6G+SbwuLHU5LEDSZlcy+CnvPqD67cg+QmJLneVmQfOBtbFHz3yDQghNrHWa+UCspUMHVGsDG6OEK7MSpPieY6TzBEYQWsikosQ+V0zBNrSCADe3GBcJ7XzafM/gb+gzJ1eP78F1sA6Ja4ZtqInqN406PwerAXaUJa2twW6529wIDAQAB",
timestamp=1)
]),
Transaction.build(
timestamp=1,
tx_inputs=[],
tx_outputs=[
TransactionOutput.build(
amount=200000000,
sender_address=COINBASE_ADDRESS,
recipient_address=
"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAznjoHvzCJtQcIYd3yj7vgwaPlyiG6U/Qlw1G89n0bNt5anvRe+e2eKzvpy98aj6ShGu7hARE9SxAFA9bIHCBqdAyPnrUaw7qGkeZNPHBByHe9prJSn0ZwBtfySOSbzdetO5aAwvLj5qMudW2PDz15mP2taGOvXqNnbcH78ZHQLvF6G+SbwuLHU5LEDSZlcy+CnvPqD67cg+QmJLneVmQfOBtbFHz3yDQghNrHWa+UCspUMHVGsDG6OEK7MSpPieY6TzBEYQWsikosQ+V0zBNrSCADe3GBcJ7XzafM/gb+gzJ1eP78F1sA6Ja4ZtqInqN406PwerAXaUJa2twW6529wIDAQAB",
timestamp=1)
]),
Transaction.build(
timestamp=1,
tx_inputs=[],
tx_outputs=[
TransactionOutput.build(
amount=300003,
sender_address=COINBASE_ADDRESS,
recipient_address=
"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAznjoHvzCJtQcIYd3yj7vgwaPlyiG6U/Qlw1G89n0bNt5anvRe+e2eKzvpy98aj6ShGu7hARE9SxAFA9bIHCBqdAyPnrUaw7qGkeZNPHBByHe9prJSn0ZwBtfySOSbzdetO5aAwvLj5qMudW2PDz15mP2taGOvXqNnbcH78ZHQLvF6G+SbwuLHU5LEDSZlcy+CnvPqD67cg+QmJLneVmQfOBtbFHz3yDQghNrHWa+UCspUMHVGsDG6OEK7MSpPieY6TzBEYQWsikosQ+V0zBNrSCADe3GBcJ7XzafM/gb+gzJ1eP78F1sA6Ja4ZtqInqN406PwerAXaUJa2twW6529wIDAQAB",
timestamp=1)
]),
])
]
@classmethod
def fetch_all_blocks(cls):
return cls.blocks
@classmethod
def fetch_block_count(cls):
return len(cls.blocks)
@classmethod
def fetch_last_block(cls):
return cls.blocks[-1]
@classmethod
def fetch_unspent_tx_outputs_by_tx_output_ids(cls, tx_output_ids):
blocks = cls.blocks
if len(blocks) == 0:
return []
transactions = reduce(
add, list(map(lambda block: block.transactions, blocks)))
if len(transactions) == 0:
return []
tx_outputs = reduce(add,
list(map(lambda tx: tx.tx_outputs, transactions)))
tx_inputs = reduce(add, list(map(lambda tx: tx.tx_inputs,
transactions)))
spent_tx_output_ids = list(
map(lambda tx_i: tx_i.transaction_output_id, tx_inputs))
unspent_tx_outputs = list(
filter(
lambda tx_o: tx_o.transaction_output_id not in
spent_tx_output_ids, tx_outputs))
return list(
filter(lambda tx_o: tx_o.transaction_output_id in tx_output_ids,
unspent_tx_outputs))
@classmethod
def fetch_unspent_tx_outputs_by_address(cls, address):
blocks = cls.blocks
if len(blocks) == 0:
return []
transactions = reduce(
add, list(map(lambda block: block.transactions, blocks)))
if len(transactions) == 0:
return []
tx_outputs = reduce(add,
list(map(lambda tx: tx.tx_outputs, transactions)))
tx_inputs = reduce(add, list(map(lambda tx: tx.tx_inputs,
transactions)))
spent_tx_output_ids = list(
map(lambda tx_i: tx_i.transaction_output_id, tx_inputs))
return list(
filter(
lambda tx_o: tx_o.recipient_address == address and tx_o.
transaction_output_id not in spent_tx_output_ids, tx_outputs))
@classmethod
def create_block(cls, block):
cls.blocks.append(block)
@classmethod
def search_new_transactions(cls, transactions):
transactions_in_chain = reduce(
add, list(map(lambda block: block.transactions, cls.blocks)))
return list(
filter(lambda tx: tx not in transactions_in_chain, transactions))
@classmethod
def delete_block(cls, deleting_block):
cls.blocks.remove(deleting_block)
@classmethod
def find_block(cls, block_id):
blocks = list(
filter(lambda block: block.block_id == block_id, cls.blocks))
if len(blocks) == 0:
return None
return blocks[0]
