def can_register(self):
# 1. The master piece needs to be registered
# 2. The number of editions needs to be registered
# 3. The edition_number should not have been registered yet
# 4. TODO The root address owns the piece
# right now we cannot do this because we only receive the leaf address
# when registering an edition
chain = BlockchainSpider.chain(self._tree, 0)
# edition 0 should only have two transactions: REGISTER and EDITIONS
if len(chain) == 0:
self.reason = 'Master edition not yet registered'
return False
chain = BlockchainSpider.strip_loan(chain)
number_editions = chain[0]['number_editions']
if number_editions == 0:
self.reason = 'Number of editions not yet registered'
return False
if self.edition_number > number_editions:
self.reason = 'You can only register {} editions. You are trying to register edition {}'.format(number_editions, self.edition_number)
return False
if self.edition_number in self._tree:
self.reason = 'Edition number {} is already registerd in the blockchain'. format(self.edition_number)
return False
return True
def can_register(self):
# 1. The master piece needs to be registered
# 2. The number of editions needs to be registered
# 3. The edition_number should not have been registered yet
# 4. TODO The root address owns the piece
# right now we cannot do this because we only receive the leaf address
# when registering an edition
chain = BlockchainSpider.chain(self._tree, 0)
# edition 0 should only have two transactions: REGISTER and EDITIONS
if len(chain) == 0:
self.reason = 'Master edition not yet registered'
return False
chain = BlockchainSpider.strip_loan(chain)
number_editions = chain[0]['number_editions']
if number_editions == 0:
self.reason = 'Number of editions not yet registered'
return False
if self.edition_number > number_editions:
self.reason = 'You can only register {} editions. You are trying to register edition {}'.format(
number_editions, self.edition_number)
return False
if self.edition_number in self._tree:
self.reason = 'Edition number {} is already registerd in the blockchain'.format(
self.edition_number)
return False
return True
def can_transfer(self):
# 1. The address needs to own the edition
chain = BlockchainSpider.chain(self._tree, self.edition_number)
if len(chain) == 0:
self.reason = 'The edition number {} does not exist in the blockchain'.format(self.edition_number)
return False
chain = BlockchainSpider.strip_loan(chain)
to_address = chain[-1]['to_address']
if to_address != self.address:
self.reason = 'Address {} does not own the edition number {}'.format(self.address, self.edition_number)
return False
return True
def can_editions(self):
# in order to register the number of editions:
# 1. There needs to a least one transaction for the piece_address (the registration of the master edition)
# 2. a piece with address piece_address needs to be registered with ASCRIBESPOOL01REGISTER0 (master edition)
# 3. the number of editions should have not been set yet (no tx with verb ASCRIBESPOOLEDITIONS)
chain = BlockchainSpider.chain(self._tree, 0)
if len(chain) == 0:
self.reason = 'Master edition not yet registered'
return False
number_editions = chain[0]['number_editions']
if number_editions != 0:
self.reason = 'Number of editions was already registered for this piece'
return False
return True
def can_transfer(self):
# 1. The address needs to own the edition
chain = BlockchainSpider.chain(self._tree, self.edition_number)
if len(chain) == 0:
self.reason = 'The edition number {} does not exist in the blockchain'.format(
self.edition_number)
return False
chain = BlockchainSpider.strip_loan(chain)
to_address = chain[-1]['to_address']
if to_address != self.address:
self.reason = 'Address {} does not own the edition number {}'.format(
self.address, self.edition_number)
return False
return True
def can_editions(self):
# in order to register the number of editions:
# 1. There needs to a least one transaction for the piece_address (the registration of the master edition)
# 2. a piece with address piece_address needs to be registered with ASCRIBESPOOL01REGISTER0 (master edition)
# 3. the number of editions should have not been set yet (no tx with verb ASCRIBESPOOLEDITIONS)
chain = BlockchainSpider.chain(self._tree, 0)
if len(chain) == 0:
self.reason = 'Master edition not yet registered'
return False
number_editions = chain[0]['number_editions']
if number_editions != 0:
self.reason = 'Number of editions was already registered for this piece'
return False
return True
def can_unconsign(self):
# 1. If the last transaction is a consign of the edition to the user
chain = BlockchainSpider.chain(self._tree, self.edition_number)
if len(chain) == 0:
self.reason = 'Master edition not yet registered'
return False
chain = BlockchainSpider.strip_loan(chain)
action = chain[-1]['action']
piece_address = chain[-1]['piece_address']
edition_number = chain[-1]['edition_number']
to_address = chain[-1]['to_address']
if action != 'CONSIGN' or piece_address != self.piece_address or edition_number != self.edition_number or to_address != self.address:
self.reason = 'Edition number {} is not consigned to {}'.format(self.edition_number, self.address)
return False
return True
def can_unconsign(self):
# 1. If the last transaction is a consign of the edition to the user
chain = BlockchainSpider.chain(self._tree, self.edition_number)
if len(chain) == 0:
self.reason = 'Master edition not yet registered'
return False
chain = BlockchainSpider.strip_loan(chain)
action = chain[-1]['action']
piece_address = chain[-1]['piece_address']
edition_number = chain[-1]['edition_number']
to_address = chain[-1]['to_address']
if action != 'CONSIGN' or piece_address != self.piece_address or edition_number != self.edition_number or to_address != self.address:
self.reason = 'Edition number {} is not consigned to {}'.format(
self.edition_number, self.address)
return False
return True
def wrapper(*args, **kwargs):
sync = kwargs.get('sync', False)
ownsership = kwargs.get('ownership', False)
name = f.__name__
testnet = args[0].testnet
t = args[0]._t
from_address = args[1][1]
to_address = args[2]
password = args[4] # TODO remove, as it is not used
# a piece has no edition number
if name not in ['register_piece', 'consigned_registration']:
edition_number = args[5]
hash = ''
if name not in ['refill', 'refill_main_wallet']:
hash = args[3][0]
# check ownership
if ownsership:
if name == 'register' and edition_number == 0:
ow = Ownership(to_address, hash, edition_number, testnet=testnet)
if not ow.can_register_master:
raise OwnershipError(ow.reason)
elif name == 'register' and edition_number != 0:
ow = Ownership(to_address, hash, edition_number, testnet=testnet)
if not ow.can_register:
raise OwnershipError(ow.reason)
elif name == 'editions':
ow = Ownership(to_address, hash, edition_number, testnet=testnet)
if not ow.can_editions:
raise OwnershipError(ow.reason)
elif name == 'transfer' or name == 'consign' or name == 'loan':
ow = Ownership(from_address, hash, edition_number, testnet=testnet)
if not ow.can_transfer:
raise OwnershipError(ow.reason)
elif name == 'unconsign':
ow = Ownership(from_address, hash, edition_number, testnet=testnet)
if not ow.can_unconsign:
raise OwnershipError(ow.reason)
# check the to address
chain = BlockchainSpider.chain(ow._tree, edition_number)
chain_from_address = chain[-1]['from_address']
if chain_from_address != to_address:
raise OwnershipError('You can only unconsign to {}'.format(chain_from_address))
# do a synchronous transaction
if sync:
txid = f(*args, **kwargs)
# lets give it some time for the transaction to reach the network
confirmations = 0
timeout = TIMEOUT
while not confirmations:
# lets do a simple exponential backoff. Transactions may take some time to be picked up by some
# services
try:
confirmations = t.get(txid).get('confirmations', 0)
timeout = TIMEOUT
except Exception as e:
if e.message.find('code: 404') != -1:
timeout *= 2
if timeout > MAX_TIMEOUT:
raise
else:
raise
time.sleep(timeout)
return txid
else:
return f(*args, **kwargs)
def wrapper(*args, **kwargs):
sync = kwargs.get('sync', False)
ownsership = kwargs.get('ownership', False)
name = f.__name__
testnet = args[0].testnet
t = args[0]._t
from_address = args[1][1]
to_address = args[2]
password = args[4]
# a piece has no edition number
if name not in ['register_piece', 'consigned_registration']:
edition_number = args[5]
hash = ''
if name not in ['refill', 'refill_main_wallet']:
hash = args[3][0]
# check ownership
if ownsership:
if name == 'register' and edition_number == 0:
ow = Ownership(to_address, hash, edition_number, testnet=testnet)
if not ow.can_register_master:
raise OwnershipError(ow.reason)
elif name == 'register' and edition_number != 0:
ow = Ownership(to_address, hash, edition_number, testnet=testnet)
if not ow.can_register:
raise OwnershipError(ow.reason)
elif name == 'editions':
ow = Ownership(to_address, hash, edition_number, testnet=testnet)
if not ow.can_editions:
raise OwnershipError(ow.reason)
elif name == 'transfer' or name == 'consign' or name == 'loan':
ow = Ownership(from_address, hash, edition_number, testnet=testnet)
if not ow.can_transfer:
raise OwnershipError(ow.reason)
elif name == 'unconsign':
ow = Ownership(from_address, hash, edition_number, testnet=testnet)
if not ow.can_unconsign:
raise OwnershipError(ow.reason)
# check the to address
chain = BlockchainSpider.chain(ow._tree, edition_number)
chain_from_address = chain[-1]['from_address']
if chain_from_address != to_address:
raise OwnershipError('You can only unconsign to {}'.format(chain_from_address))
# do a synchronous transaction
if sync:
txid = f(*args, **kwargs)
# lets give it some time for the transaction to reach the network
confirmations = 0
timeout = TIMEOUT
while not confirmations:
# lets do a simple exponential backoff. Transactions may take some time to be picked up by some
# services
try:
confirmations = t.get(txid).get('confirmations', 0)
timeout = TIMEOUT
except Exception as e:
if e.message.find('code: 404') != -1:
timeout *= 2
if timeout > MAX_TIMEOUT:
raise
else:
raise
time.sleep(timeout)
return txid
else:
return f(*args, **kwargs)
