def issue(app_config, certificate_batch_handler, transaction_handler):
unsigned_certs_dir = app_config.unsigned_certificates_dir
signed_certs_dir = app_config.signed_certificates_dir
blockchain_certificates_dir = app_config.blockchain_certificates_dir
work_dir = app_config.work_dir
certificates_metadata = helpers.prepare_issuance_batch(unsigned_certs_dir, signed_certs_dir,
blockchain_certificates_dir, work_dir)
num_certificates = len(certificates_metadata)
if num_certificates < 1:
logging.warning('No certificates to process')
return None
logging.info('Processing %d certificates under work path=%s', num_certificates, work_dir)
certificate_batch_handler.set_certificates_in_batch(certificates_metadata)
transaction_handler.ensure_balance()
issuer = Issuer(
certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
tx_id = issuer.issue(app_config.bitcoin_chain)
helpers.copy_output(certificates_metadata)
logging.info('Your Blockchain Certificates are in %s', blockchain_certificates_dir)
return tx_id
def issue(app_config, certificate_batch_handler, transaction_handler):
unsigned_certs_dir = app_config.unsigned_certificates_dir
signed_certs_dir = app_config.signed_certificates_dir
blockchain_certificates_dir = app_config.blockchain_certificates_dir
work_dir = app_config.work_dir
certificates_metadata = helpers.prepare_issuance_batch(
unsigned_certs_dir, signed_certs_dir, blockchain_certificates_dir,
work_dir)
num_certificates = len(certificates_metadata)
if num_certificates < 1:
logging.warning('No certificates to process')
return None
logging.info('Processing %d certificates under work path=%s',
num_certificates, work_dir)
certificate_batch_handler.set_certificates_in_batch(certificates_metadata)
transaction_handler.ensure_balance()
issuer = Issuer(certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
tx_id = issuer.issue(app_config.bitcoin_chain)
helpers.copy_output(certificates_metadata)
logging.info('Your Blockchain Certificates are in %s',
blockchain_certificates_dir)
return tx_id
def update_token_uri(app_config, certificate_batch_handler,
transaction_handler, token_id, token_uri):
issuer = Issuer(certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
issuer.update_token_uri(app_config.chain, app_config, token_id, token_uri)
def finish_tx(self, sent_tx_file_name, tx_id):
Issuer.finish_tx(self, sent_tx_file_name, tx_id)
# note that certificates are stored in an ordered dictionary, so we will iterate in the same order
index = 0
for uid, _ in self.certificates_to_issue.items():
receipt = self.tree.make_receipt(index, tx_id)
receipt_file_name = convert_file_name(
self.config.receipts_file_pattern, uid)
with open(receipt_file_name, 'w') as out_file:
out_file.write(json.dumps(receipt))
signed_cert_file_name = convert_file_name(
self.config.signed_certs_file_pattern, uid)
with open(signed_cert_file_name, 'r') as in_file:
signed_cert = json.load(in_file)
blockchain_cert = {
'@context': 'https://w3id.org/blockcerts/v1',
'type': 'BlockchainCertificate',
'document': signed_cert,
'receipt': receipt
}
blockchain_cert_file_name = convert_file_name(
self.config.blockchain_certificates_file_pattern, uid)
with open(blockchain_cert_file_name, 'w') as out_file:
out_file.write(json.dumps(blockchain_cert))
index += 1
def get_cost_for_certificate_batch(self, dust_threshold, recommended_fee_per_transaction, satoshi_per_byte,
allow_transfer):
num_certificates = len(self.certificates_to_issue)
num_outputs = Issuer.get_num_outputs(num_certificates)
return Issuer.get_cost_for_certificate_batch(dust_threshold, recommended_fee_per_transaction,
satoshi_per_byte, num_outputs, allow_transfer, num_certificates,
num_certificates)
def __init__(self, netcode, issuing_address, certificates_to_issue,
connector, signer, batch_metadata, tx_cost_constants):
Issuer.__init__(self, netcode, issuing_address, certificates_to_issue,
connector, signer)
self.tree = MerkleTree(hash_f=sha256)
self.batch_id = batch_metadata.batch_id
self.batch_metadata = batch_metadata
self.tx_cost_constants = tx_cost_constants
def get_cost_for_certificate_batch(self, dust_threshold, recommended_fee_per_transaction, satoshi_per_byte,
allow_transfer):
'''
Per certificate, we pay 2*min_per_output (which is based on dust) + fee. Note assumes 1 input
per tx. We may also need to pay additional fees for splitting into temp addresses
'''
num_certificates = len(self.certificates_to_issue)
num_outputs = Issuer.get_num_outputs(num_certificates)
return Issuer.get_cost_for_certificate_batch(dust_threshold, recommended_fee_per_transaction, satoshi_per_byte,
num_outputs, allow_transfer, 1, 1)
def get_cost_for_certificate_batch(self, allow_transfer):
"""
Per certificate, we pay 2*min_per_output (which is based on dust) + fee. Note assumes 1 input
per tx. We may also need to pay additional fees for splitting into temp addresses
:param allow_transfer:
:return:
"""
num_certificates = len(self.certificates_to_issue)
num_outputs = Issuer.get_num_outputs(num_certificates)
return Issuer.get_cost_for_certificate_batch(num_outputs,
allow_transfer)
def issue(app_config, certificate_batch_handler, transaction_handler):
certificate_batch_handler.pre_batch_actions(app_config)
transaction_handler.ensure_balance()
issuer = Issuer(certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
tx_id = issuer.issue(app_config.chain)
certificate_batch_handler.post_batch_actions(app_config)
return tx_id
def issue(app_config, certificate_batch_handler, transaction_handler):
certificate_batch_handler.pre_batch_actions(app_config)
transaction_handler.ensure_balance()
issuer = Issuer(certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
tx_id = issuer.issue(app_config.chain)
""""Este metodo copia del workingDir al blockchainCertDir"""
#certificate_batch_handler.post_batch_actions(app_config)
return tx_id
def post(self):
json_data = request.get_json(force=True)
# get recipient from the json_data
fields = {}
fields["identity"] = json_data['email']
fields["name"] = json_data['name']
recipient = Recipient(fields)
# get the template from db
template_col = DAO().get_collection('certificate_template')
template = template_col.find_one({}, {"_id": 0})
# get deep copy of the template as cert
cert = deepcopy(template)
# get the config
config = Config().get()
# call instantiate_assertion and instantiate_recipient
uid = str(uuid.uuid4())
issued_on = helpers.create_iso8601_tz()
instantiate_assertion(cert, uid, issued_on)
instantiate_recipient(cert, recipient,
config.additional_per_recipient_fields,
config.hash_emails)
# get the config
config = Config().get()
# post it to blockchain
# first instantiate handlers
chain = config.chain
if chain == Chain.ethereum_mainnet or chain == Chain.ethereum_ropsten:
from cert_issuer.blockchain_handlers import ethereum
certificate_batch_handler, transaction_handler, connector = ethereum.instantiate_blockchain_handlers(
config, False)
else:
from cert_issuer.blockchain_handlers import bitcoin
certificate_batch_handler, transaction_handler, connector = bitcoin.instantiate_blockchain_handlers(
config, False)
certificate_batch_handler.certificates_to_issue = [cert]
issuer = Issuer(certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=config.max_retry)
tx_id = issuer.issue(config.chain)
issued_cert = certificate_batch_handler.certificates_to_issue[0]
issued_cert_to_insert = deepcopy(issued_cert)
cert_col = DAO().get_collection("certificates")
cert_col.insert_one(issued_cert_to_insert)
return issued_cert
def issue(app_config, certificate_batch_handler, transaction_handler):
certificate_batch_handler.pre_batch_actions(app_config)
transaction_handler.ensure_balance()
issuer = Issuer(
certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
tx_id = issuer.issue(app_config.chain)
certificate_batch_handler.post_batch_actions(app_config)
return tx_id
def issue(app_config, certificate_batch_handler, transaction_handler,
recipient_address, token_uri):
certificate_batch_handler.pre_batch_actions(app_config)
transaction_handler.ensure_balance()
issuer = Issuer(certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
(tx_id, token_id) = issuer.issue(app_config.chain, app_config,
recipient_address, token_uri)
certificate_batch_handler.post_batch_actions(app_config)
return (tx_id, token_id)
def issue(app_config, certificate_batch_handler, transaction_handler,
recipient_address, uidArray, token_uri):
# Provide array of uidArrays to generate certificates
certificate_batch_handler.pre_batch_actions(app_config, uidArray)
transaction_handler.ensure_balance()
issuer = Issuer(certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler,
max_retry=app_config.max_retry)
(tx_id, token_id) = issuer.issue(app_config.chain, app_config,
recipient_address, token_uri)
certificate_batch_handler.post_batch_actions(app_config)
return (tx_id, token_id)
def main(app_config, secure_signer=None):
unsigned_certs_dir = app_config.unsigned_certificates_dir
signed_certs_dir = app_config.signed_certificates_dir
blockchain_certificates_dir = app_config.blockchain_certificates_dir
work_dir = app_config.work_dir
v2 = app_config.v2
issuing_address = app_config.issuing_address
revocation_address = app_config.revocation_address # not needed for v2
certificates, batch_metadata = helpers.prepare_issuance_batch(
unsigned_certs_dir, signed_certs_dir, blockchain_certificates_dir,
work_dir)
logging.info('Processing %d certificates under work path=%s',
len(certificates), work_dir)
logging.info('Signing certificates...')
if not secure_signer:
secure_signer = secure_signer_helper.initialize_secure_signer(
app_config)
connector = ServiceProviderConnector(app_config.bitcoin_chain)
tx_constants = TransactionCostConstants(app_config.tx_fee,
app_config.dust_threshold,
app_config.satoshi_per_byte)
if v2:
certificate_handler = CertificateV2Handler()
transaction_handler = TransactionV2Handler(
tx_cost_constants=tx_constants, issuing_address=issuing_address)
else:
certificate_handler = CertificateV1_2Handler()
transaction_handler = TransactionV1_2Handler(
tx_cost_constants=tx_constants,
issuing_address=issuing_address,
certificates_to_issue=certificates,
revocation_address=revocation_address)
certificate_batch_handler = CertificateBatchHandler(
certificates_to_issue=certificates,
certificate_handler=certificate_handler)
issuer = Issuer(issuing_address=issuing_address,
connector=connector,
secure_signer=secure_signer,
certificate_batch_handler=certificate_batch_handler,
transaction_handler=transaction_handler)
transaction_cost = issuer.calculate_cost_for_certificate_batch()
logging.info('Total cost will be %d satoshis', transaction_cost)
# ensure the issuing address has sufficient balance
balance = connector.get_balance(issuing_address)
if transaction_cost > balance:
error_message = 'Please add {} satoshis to the address {}'.format(
transaction_cost - balance, issuing_address)
logging.error(error_message)
raise InsufficientFundsError(error_message)
tx_id = issuer.issue_certificates()
blockcerts_tmp_dir = os.path.join(work_dir,
helpers.BLOCKCHAIN_CERTIFICATES_DIR)
if not os.path.exists(blockchain_certificates_dir):
os.makedirs(blockchain_certificates_dir)
for item in os.listdir(blockcerts_tmp_dir):
s = os.path.join(blockcerts_tmp_dir, item)
d = os.path.join(blockchain_certificates_dir, item)
shutil.copy2(s, d)
logging.info('Your Blockchain Certificates are in %s',
blockchain_certificates_dir)
return tx_id
def __init__(self, config, certificates_to_issue):
Issuer.__init__(self, config, certificates_to_issue)
self.batch_id = '%024x' % random.randrange(16**24)
self.tree = MerkleTree(hash_f=sha256)
def __init__(self, config, certificates_to_issue):
Issuer.__init__(self, config, certificates_to_issue)
