def _normalize_asset(asset, is_transfer=False): """ Normalizes the given asset dictionary. For now, this means converting the given asset dictionary to a :class:`~.bigchaindb.common.transaction.Asset` class. Args: asset (dict): The asset to normalize. is_transfer (boal, optional): Flag used to indicate whether the asset is to be used as part of a `'TRANSFER'` operation or not. Defaults to ``False``. Returns: The :class:`~.bigchaindb.common.transaction.Asset` class, instantiated from the given asset dictionary. .. important:: If the instantiation step fails, ``None`` may be returned. .. danger:: For specific internal usage only. The behavior is tricky, and is subject to change. """ if is_transfer: asset = Asset.from_dict(asset) else: try: asset = Asset(**asset) except (AttributeError, TypeError): if not asset: asset = None return asset
def transfer(self, transaction, *owners_after, asset, signing_key=None): """Issue a transaction to transfer an asset. Args: transaction (dict): The transaction to transfer. owners_after (str): Zero or more public keys of the new owners. asset (dict): Asset to transfer. signing_key (str): Private key used to sign transactions. Returns: dict: The transaction pushed to the Federation. Raises: :class:`~bigchaindb_driver.exceptions.InvalidSigningKey`: If neither ``signing_key`` nor ``self.signing_key`` have been set. """ signing_key = signing_key if signing_key else self.signing_key if not signing_key: raise InvalidSigningKey transaction_obj = Transaction.from_dict(transaction) signed_transfer_transaction = Transaction.transfer( transaction_obj.to_inputs(), list(owners_after), asset=Asset.from_dict(asset), ).sign([signing_key]).to_dict() return self._push(signed_transfer_transaction)
def create_transfer(p_num): print(p_num, ":create_transfer start") while True: alice, bob = generate_keypair(), generate_keypair() asset = Asset(data={'money': 'RMB'}, data_id='20170628150000', divisible=True) metadata = {'planet': 'earth'} tx_create = Transaction.create([alice.public_key], [([alice.public_key], 1)], metadata=metadata, asset=asset) tx_create = tx_create.sign([alice.private_key]) try: create_queue.put(tx_create, False) except Full: print(p_num, ":create_queue full", create_queue.qsize()) break cid = 0 condition = tx_create.to_dict()['transaction']['conditions'][cid] inputs = Fulfillment.from_dict({ 'fulfillment': condition['condition']['details'], 'input': { 'cid': cid, 'txid': tx_create.to_dict()['id'], }, 'owners_before': condition['owners_after'], }) asset = Asset.from_dict(tx_create.to_dict()['transaction']['asset']) tx_transfer = Transaction.transfer([inputs], [([bob.public_key], 1)], asset) tx_transfer = tx_transfer.sign([alice.private_key]) try: transfer_queue.put(tx_transfer, False) except Full: print(p_num, ":transfer_queue full") break
def get_asset_by_id(self, asset_id): """Returns the asset associated with an asset_id. Args: asset_id (str): The asset id. Returns: :class:`~bigchaindb.common.transaction.Asset` if the asset exists else None. """ cursor = backend.query.get_asset_by_id(self.connection, asset_id) cursor = list(cursor) if cursor: return Asset.from_dict(cursor[0]['asset'])
def create_transfer(): ##################################################### 1.CREATE # Cryptographic Identities Generation alice, bob = generate_keypair(), generate_keypair() # Digital Asset Definition (e.g. bicycle) asset = Asset(data={"bicycle": {"manufacturer": "bkfab", "serial_number": "abcd1234"}}) # Metadata Definition metadata = {'planet': 'earth'} # create trnsaction TODO : owners_before might be node_pubkey in v0.8.0 tx = Transaction.create([alice.public_key], [([alice.public_key], 1)], metadata=metadata, asset=asset) print(" ") print("1.tx_create asset id : alice-----bicycle(", tx.to_dict()['transaction']['asset']['id'], ")----->alice") print("1.tx_create tx id : ", tx.to_dict()['id']) # sign with alice's private key tx = tx.sign([alice.private_key]) tx_id = tx.to_dict()['id'] # write to backlog b = Bigchain() print("1.tx_create db response : ", b.write_transaction(tx)) # wait 2 sec sleep(delay) # get tx by id tx = b.get_transaction(tx_id) print("1.tx_create query : ", tx) # print("tx1_id:"+tx.to_dict()['id']) print(" ") ##################################################### 2.TRANSFER # inputs and asset [fake] cid = 0 condition = tx.to_dict()['transaction']['conditions'][cid] inputs = Fulfillment.from_dict({ 'fulfillment': condition['condition']['details'], 'input': { 'cid': cid, 'txid': tx.to_dict()['id'], }, 'owners_before': [bob.public_key], }) asset = Asset.from_dict(tx.to_dict()['transaction']['asset']) # transfer tx = Transaction.transfer([inputs], [([bob.public_key], 1)], asset) print("2.tx_fake asset id : bob-----bicycle(", tx.to_dict()['transaction']['asset']['id'], ")----->bob") print("2.tx_fake tx id : ", tx.to_dict()['id']) # sign with bob's private key [fake] tx = tx.sign([bob.private_key]) tx_id = tx.to_dict()['id'] # write to backlog b = Bigchain() print("2.tx_fake db response : ", b.write_transaction(tx)) # wait 2 sec sleep(delay) # get tx by id tx = b.get_transaction(tx_id) print("2.tx_fake query : ", tx) # print("tx2_id:"+tx.to_dict()['id']) print(" ")
def create_transfer(): ##################################################### 1.CREATE # Cryptographic Identities Generation alice, bob, tom = generate_keypair(), generate_keypair(), generate_keypair( ) asset = Asset(data={'money': 'RMB'}, data_id='20170628150000', divisible=True) metadata = {'planet': 'earth'} tx = Transaction.create([alice.public_key], [([alice.public_key], 1000)], metadata=metadata, asset=asset) print(" ") print("1.tx_create asset id : alice-----money 1000(", tx.to_dict()['transaction']['asset']['id'], ")----->alice") print("1.tx_create tx id : ", tx.to_dict()['id']) # sign with alice's private key tx = tx.sign([alice.private_key]) tx_id = tx.to_dict()['id'] # write to backlog b = Bigchain() print("1.tx_create db response : ", b.write_transaction(tx)) # wait 4 sec sleep(delay) # get tx by id tx = b.get_transaction(tx_id) print("1.tx_create query : ", tx) # print("tx1_id:"+tx.to_dict()['id']) print(" ") ##################################################### 2.TRANSFER # inputs and asset cid = 0 condition = tx.to_dict()['transaction']['conditions'][cid] inputs = Fulfillment.from_dict({ 'fulfillment': condition['condition']['details'], 'input': { 'cid': cid, 'txid': tx.to_dict()['id'], }, 'owners_before': condition['owners_after'], }) asset = Asset.from_dict(tx.to_dict()['transaction']['asset']) # transfer tx = Transaction.transfer([inputs], [([bob.public_key], 300), ([alice.public_key], 700)], asset) print("2.tx_transfer asset id : alice-----money 300(", tx.to_dict()['transaction']['asset']['id'], ")----->bob") print("2.tx_transfer tx id : ", tx.to_dict()['id']) print("2.tx_transfer tx : ", tx.to_dict()) print(" ") # sign with alice's private key tx = tx.sign([alice.private_key]) # man in the middle attack, then write to backlog tx.conditions[0].amount = 600 tx.conditions[1].amount = 400 print("3.tx_attack asset id : alice-----money 600(", tx.to_dict()['transaction']['asset']['id'], ")----->tom") print("3.tx_attack tx id : ", tx.to_dict()['id']) print("3.tx_attack tx : ", tx.to_dict()) tx_id = tx.to_dict()['id'] b = Bigchain() print("3.tx_attack db response : ", b.write_transaction(tx)) # wait 4 sec sleep(delay) # get tx by id tx = b.get_transaction(tx_id) print("3.tx_attack query : ", tx) print(" ")
def create_double(): ##################################################### 1.CREATE # Cryptographic Identities Generation alice, bob = generate_keypair(), generate_keypair() # Digital Asset Definition (e.g. money) asset = Asset(data={'money': 'RMB'}, data_id='20170628150000', divisible=True) # Metadata Definition metadata = {'planet': 'earth'} # create trnsaction TODO : owners_before might be node_pubkey in v0.8.0 tx = Transaction.create([alice.public_key], [([alice.public_key], 100), ([alice.public_key], 100)], metadata=metadata, asset=asset) print(" ") print("1.tx_create asset id : alice-----money(", tx.to_dict()['transaction']['asset']['id'], ")----->alice") print("1.tx_create tx id : ", tx.to_dict()['id']) # sign with alice's private key tx = tx.sign([alice.private_key]) tx_id = tx.to_dict()['id'] # write to backlog b = Bigchain() print("1.tx_create db response : ", b.write_transaction(tx)) # wait 2 sec sleep(delay) # get tx by id tx = b.get_transaction(tx_id) unspent = b.get_outputs_filtered_not_include_freeze( alice.public_key, False) print("1.tx_create query : ", tx) print("1.tx_create unspent : ", unspent) print(" ") ##################################################### 2.TRANSFER # inputs and asset cid = 0 condition = tx.to_dict()['transaction']['conditions'][cid] inputs = Fulfillment.from_dict({ 'fulfillment': condition['condition']['details'], 'input': { 'cid': cid, 'txid': tx.to_dict()['id'], }, 'owners_before': [alice.public_key], }) asset = Asset.from_dict(tx.to_dict()['transaction']['asset']) # transfer tx1 = Transaction.transfer([inputs], [([bob.public_key], 100)], asset) print("2.tx_transfer asset id : alice-----money(", tx1.to_dict()['transaction']['asset']['id'], ")----->bob") print("2.tx_transfer tx id : ", tx1.to_dict()['id']) # sign with alice's private key tx1 = tx1.sign([alice.private_key]) tx1_id = tx1.to_dict()['id'] # write to backlog b = Bigchain() print("2.tx_transfer db response : ", b.write_transaction(tx1)) # wait 2 sec sleep(delay) # get tx by id tx1 = b.get_transaction(tx1_id) block = list(b.get_blocks_status_containing_tx(tx1_id).keys())[0] votes = list(b.backend.get_votes_by_block_id(block)) votes_cast = [vote['vote']['is_block_valid'] for vote in votes] election = b.get_blocks_status_containing_tx(tx1_id) print("2.tx_transfer query : ", tx1) print("2.tx_transfer block : ", block) print("2. votes : ", votes) print("2. votes_cast : ", votes_cast) print("2. election : ", election) print(" ") ##################################################### 3.INTERVAL # Cryptographic Identities Generation alice, bob = generate_keypair(), generate_keypair() # Digital Asset Definition (e.g. money) asset = Asset(data={'money': 'RMB'}, data_id='20170628150000', divisible=True) # Metadata Definition metadata = {'planet': 'earth'} # create trnsaction TODO : owners_before might be node_pubkey in v0.8.0 txi = Transaction.create([alice.public_key], [([alice.public_key], 100), ([alice.public_key], 100)], metadata=metadata, asset=asset) print(" ") print("1.tx_create asset id : alice-----money(", tx.to_dict()['transaction']['asset']['id'], ")----->alice") print("1.tx_create tx id : ", txi.to_dict()['id']) # sign with alice's private key txi = txi.sign([alice.private_key]) tx_id = txi.to_dict()['id'] # write to backlog b = Bigchain() print("1.tx_create db response : ", b.write_transaction(tx)) # wait 2 sec sleep(delay) ##################################################### 3.TRANSFER # inputs and asset [double spend] cid = 1 condition = tx.to_dict()['transaction']['conditions'][cid] inputs = Fulfillment.from_dict({ 'fulfillment': condition['condition']['details'], 'input': { 'cid': cid, 'txid': tx.to_dict()['id'], }, 'owners_before': [alice.public_key], }) asset = Asset.from_dict(tx.to_dict()['transaction']['asset']) # transfer tx1 = Transaction.transfer([inputs], [([bob.public_key], 100)], asset) print("3.tx_double asset id : alice-----money(", tx1.to_dict()['transaction']['asset']['id'], ")----->bob") print("3.tx_double tx id : ", tx1.to_dict()['id']) # sign with alice's private key tx1 = tx1.sign([alice.private_key]) tx1_id = tx1.to_dict()['id'] # write to backlog b = Bigchain() print("3.tx_double db response : ", b.write_transaction(tx1)) # wait 2 sec sleep(delay) # get tx by id tx1 = b.get_transaction(tx1_id) block = list(b.get_blocks_status_containing_tx(tx1_id).keys())[0] votes = list(b.backend.get_votes_by_block_id(block)) votes_cast = [vote['vote']['is_block_valid'] for vote in votes] election = b.get_blocks_status_containing_tx(tx1_id) print("3.tx_transfer query : ", tx1) print("3.tx_transfer block : ", block) print("3. votes : ", votes) print("3. votes_cast : ", votes_cast) print("3. election : ", election) print(" ")
def create_transfer(alicepub, alicepriv, include_spent): ##################################################### 1.CREATE # Cryptographic Identities Generation # alice, bob = generate_keypair(), generate_keypair() # Digital Asset Definition (e.g. bicycle) asset = Asset(data={ "bicycle": { "manufacturer": "bkfab", "serial_number": "abcd1234" } }, data_id="334cd061-846b-4213-bd25-588e951def5f") # Metadata Definition metadata = {'planet': 'earth'} # create trnsaction TODO : owners_before might be node_pubkey in v0.8.0 tx = Transaction.create([alicepub], [([alicepub], 100)], metadata=metadata, asset=asset) # sign with alice's private key tx = tx.sign([alicepriv]) tx_id = tx.to_dict()['id'] # write to backlog b = Bigchain() b.write_transaction(tx) print("========create 100 asset for userA========") print("========wait for block and vote...========") # wait 2 sec sleep(5) # get tx by id tx = b.get_transaction(tx_id) print("create 100 asset tx1_id:" + tx.to_dict()['id']) ##################################################### 3.UTXO # inputs and asset utxo = b.get_outputs_filtered_not_include_freeze(alicepub, include_spent) for u in utxo: # print(u) u.pop('details') print('userA unspent asset:') print(json.dumps(utxo, indent=4)) # print(json.load(utxo)) ##################################################### 2.Freeze # inputs and asset cid = 0 condition = tx.to_dict()['transaction']['conditions'][cid] inputs = Fulfillment.from_dict({ 'fulfillment': condition['condition']['details'], 'input': { 'cid': cid, 'txid': tx.to_dict()['id'], }, 'owners_before': condition['owners_after'], }) asset = Asset.from_dict(tx.to_dict()['transaction']['asset']) # transfer tx = Transaction.freeze_asset([inputs], [([alicepub], 90, True), ([alicepub], 10, False)], asset) # sign with alice's private key tx = tx.sign([alicepriv]) tx_id = tx.to_dict()['id'] # write to backlog b = Bigchain() b.write_transaction(tx) print("========freeze 90 asset for userA ========") print("========wait for block and vote...========") # wait 2 sec sleep(5) # get tx by id tx = b.get_transaction(tx_id) print("freeze 90 asset tx2_id:" + tx.to_dict()['id']) ##################################################### 3.UTXO # inputs and asset utxo = b.get_outputs_filtered_not_include_freeze(alicepub, include_spent) for u in utxo: # print(u) u.pop('details') print('userA unspent asset:') print(json.dumps(utxo, indent=4))
def create_transfer(): ##################################################### 1.CREATE # Cryptographic Identities Generation alice, bob, tom = generate_keypair(), generate_keypair(), generate_keypair() asset = Asset(data={"bicycle": {"manufacturer": "bkfab", "serial_number": "abcd1234"}}) metadata = {'planet': 'earth'} tx = Transaction.create([alice.public_key], [([alice.public_key], 1)], metadata=metadata, asset=asset) print(" ") print("1.tx_create asset id : alice-----bicycle(", tx.to_dict()['transaction']['asset']['id'], ")----->alice") print("1.tx_create tx id : ", tx.to_dict()['id']) # sign with alice's private key tx = tx.sign([alice.private_key]) tx_id = tx.to_dict()['id'] # write to backlog b = Bigchain() print("1.tx_create db response : ", b.write_transaction(tx)) # wait 4 sec sleep(delay) # get tx by id tx = b.get_transaction(tx_id) print("1.tx_create query : ", tx) # print("tx1_id:"+tx.to_dict()['id']) print(" ") ##################################################### 2.TRANSFER # inputs and asset cid = 0 condition = tx.to_dict()['transaction']['conditions'][cid] inputs = Fulfillment.from_dict({ 'fulfillment': condition['condition']['details'], 'input': { 'cid': cid, 'txid': tx.to_dict()['id'], }, 'owners_before': condition['owners_after'], }) asset = Asset.from_dict(tx.to_dict()['transaction']['asset']) # transfer tx = Transaction.transfer([inputs], [([bob.public_key], 1)], asset) print("2.tx_transfer asset id : alice-----bicycle(", tx.to_dict()['transaction']['asset']['id'], ")----->bob") print("2.tx_transfer tx id : ", tx.to_dict()['id']) print("2.tx_transfer tx : ", tx.to_dict()) print(" ") # sign with alice's private key tx = tx.sign([alice.private_key]) # man in the middle attack, then write to backlog tx.conditions[0].owners_after = [tom.public_key] print("3.tx_attack asset id : alice-----bicycle(", tx.to_dict()['transaction']['asset']['id'], ")----->tom") print("3.tx_attack tx id : ", tx.to_dict()['id']) print("3.tx_attack tx : ", tx.to_dict()) tx_id = tx.to_dict()['id'] b = Bigchain() print("3.tx_attack db response : ", b.write_transaction(tx)) # wait 4 sec sleep(delay) # get tx by id tx = b.get_transaction(tx_id) print("3.tx_attack query : ", tx) print(" ")