def create(self, metadata, publisher_account,
service_descriptors=None, providers=None,
authorization_type=ServiceAuthorizationTypes.PSK_RSA, use_secret_store=False,
activity_id=None, attributes=None, asset_rewards={"_amounts": [], "_receivers": []},
cap=None, royalties=None, mint=0):
"""
Register an asset in both the keeper's DIDRegistry (on-chain) and in the Metadata store.
:param metadata: dict conforming to the Metadata accepted by Nevermined Protocol.
:param publisher_account: Account of the publisher registering this asset
:param service_descriptors: list of ServiceDescriptor tuples of length 2.
The first item must be one of ServiceTypes and the second
item is a dict of parameters and values required by the service
:param providers: list of addresses of providers of this asset (a provider is
an ethereum account that is authorized to provide asset services)
:param authorization_type: str indicate the authorization type that is going to be used
to encrypt the urls.
SecretStore, PSK-RSA and PSK-ECDSA are supported.
:param use_secret_store: bool indicate whether to use the secret store directly for
encrypting urls (Uses Gateway provider service if set to False)
:param activity_id: identifier of the activity creating the new entity
:param attributes: attributes associated with the action
:param asset_rewards: rewards distribution including the amounts and the receivers
:param cap: max cap of nfts that can be minted for the asset
:param royalties: royalties in the secondary market going to the original creator
:param mint: number of nfts to mint just after registration of the asset
:return: DDO instance
"""
assert isinstance(metadata, dict), f'Expected metadata of type dict, got {type(metadata)}'
# copy metadata so we don't change the original
metadata_copy = copy.deepcopy(metadata)
# Create a DDO object
ddo = DDO()
gateway = GatewayProvider.get_gateway()
ddo_service_endpoint = self._get_metadata_provider().get_service_endpoint()
metadata_service_desc = ServiceDescriptor.metadata_service_descriptor(metadata_copy,
ddo_service_endpoint)
if metadata_copy['main']['type'] == 'dataset' or metadata_copy['main'][
'type'] == 'algorithm':
access_service_attributes = self._build_access(metadata_copy, publisher_account, asset_rewards)
if not service_descriptors:
if authorization_type == ServiceAuthorizationTypes.PSK_RSA:
service_descriptors = [ServiceDescriptor.authorization_service_descriptor(
self._build_authorization(authorization_type,
public_key=gateway.get_rsa_public_key(self._config)),
gateway.get_access_endpoint(self._config)
)]
elif authorization_type == ServiceAuthorizationTypes.PSK_ECDSA:
service_descriptors = [ServiceDescriptor.authorization_service_descriptor(
self._build_authorization(authorization_type,
public_key=gateway.get_ecdsa_public_key(self._config)),
gateway.get_access_endpoint(self._config)
)]
else:
service_descriptors = [ServiceDescriptor.authorization_service_descriptor(
self._build_authorization(authorization_type, threshold=0),
self._config.secret_store_url
)]
service_descriptors += [ServiceDescriptor.access_service_descriptor(
access_service_attributes,
gateway.get_access_endpoint(self._config)
)]
else:
service_types = set(map(lambda x: x[0], service_descriptors))
if ServiceTypes.AUTHORIZATION not in service_types:
if authorization_type == ServiceAuthorizationTypes.PSK_RSA:
service_descriptors += [ServiceDescriptor.authorization_service_descriptor(
self._build_authorization(authorization_type,
public_key=gateway.get_rsa_public_key(self._config)),
gateway.get_access_endpoint(self._config)
)]
elif authorization_type == ServiceAuthorizationTypes.PSK_ECDSA:
service_descriptors += [ServiceDescriptor.authorization_service_descriptor(
self._build_authorization(authorization_type,
public_key=gateway.get_ecdsa_public_key(self._config)),
gateway.get_access_endpoint(self._config)
)]
else:
service_descriptors += [ServiceDescriptor.authorization_service_descriptor(
self._build_authorization(authorization_type, threshold=0),
self._config.secret_store_url
)]
else:
service_descriptors += [ServiceDescriptor.access_service_descriptor(
access_service_attributes,
gateway.get_access_endpoint(self._config)
)]
else:
if not service_descriptors:
service_descriptors = []
else:
service_descriptors += []
logger.info('registering a workflow.')
# Add all services to ddo
service_descriptors = [metadata_service_desc] + service_descriptors
services = ServiceFactory.build_services(service_descriptors)
checksums = dict()
for service in services:
checksums[str(service.index)] = checksum(service.main)
# Adding proof to the ddo.
ddo.add_proof(checksums, publisher_account)
# Generating the did and adding to the ddo.
did_seed = checksum(ddo.proof['checksum'])
asset_id = self._keeper.did_registry.hash_did(did_seed, publisher_account.address)
ddo._did = DID.did(asset_id)
did = ddo._did
logger.debug(f'Generating new did: {did}')
# Check if it's already registered first!
if did in self._get_metadata_provider().list_assets():
raise DIDAlreadyExist(
f'Asset id {did} is already registered to another asset.')
for service in services:
if service.type == ServiceTypes.ASSET_ACCESS:
access_service = ServiceFactory.complete_access_service(
did,
gateway.get_access_endpoint(self._config),
access_service_attributes,
self._keeper.access_template.address,
self._keeper.escrow_payment_condition.address,
service.type
)
ddo.add_service(access_service)
elif service.type == ServiceTypes.NFT_ACCESS:
access_service = ServiceFactory.complete_access_service(
did,
gateway.get_nft_access_endpoint(self._config),
self._build_nft_access(metadata_copy, publisher_account, asset_rewards, service.main['_numberNfts']),
self._keeper.nft_access_template.address,
self._keeper.escrow_payment_condition.address,
service.type
)
ddo.add_service(access_service)
elif service.type == ServiceTypes.NFT_SALES:
nft_sales_service = ServiceFactory.complete_nft_sales_service(
did,
gateway.get_access_endpoint(self._config),
service.attributes,
self._keeper.nft_sales_template.address,
self._keeper.escrow_payment_condition.address,
service.type
)
ddo.add_service(nft_sales_service)
elif service.type == ServiceTypes.METADATA:
ddo_service_endpoint = service.service_endpoint.replace('{did}', did)
service.set_service_endpoint(ddo_service_endpoint)
ddo.add_service(service)
elif service.type == ServiceTypes.CLOUD_COMPUTE:
compute_service = ServiceFactory.complete_compute_service(
did,
service.service_endpoint,
service.attributes,
self._keeper.compute_execution_condition.address,
self._keeper.escrow_payment_condition.address
)
ddo.add_service(compute_service)
else:
ddo.add_service(service)
ddo.proof['signatureValue'] = self._keeper.sign_hash(
add_ethereum_prefix_and_hash_msg(did_to_id_bytes(did)),
publisher_account)
# Add public key and authentication
ddo.add_public_key(did, publisher_account.address)
ddo.add_authentication(did, PUBLIC_KEY_TYPE_RSA)
# Setup metadata service
# First compute files_encrypted
if metadata_copy['main']['type'] in ['dataset', 'algorithm']:
assert metadata_copy['main'][
'files'], 'files is required in the metadata main attributes.'
logger.debug('Encrypting content urls in the metadata.')
if not use_secret_store:
encrypt_endpoint = gateway.get_encrypt_endpoint(self._config)
files_encrypted = gateway.encrypt_files_dict(
metadata_copy['main']['files'],
encrypt_endpoint,
ddo.asset_id,
authorization_type)
else:
files_encrypted = self._get_secret_store(publisher_account) \
.encrypt_document(
did_to_id(did),
json.dumps(metadata_copy['main']['files']),
)
# only assign if the encryption worked
if files_encrypted:
logger.debug(f'Content urls encrypted successfully {files_encrypted}')
index = 0
for file in metadata_copy['main']['files']:
file['index'] = index
index = index + 1
del file['url']
metadata_copy['encryptedFiles'] = files_encrypted
else:
raise AssertionError('Encrypting the files failed.')
# DDO url and `Metadata` service
logger.debug(
f'Generated ddo and services, DID is {ddo.did},'
f' metadata service @{ddo_service_endpoint}.')
response = None
# register on-chain
if mint > 0 or royalties is not None or cap is not None:
registered_on_chain = self._keeper.did_registry.register_mintable_did(
did_seed,
checksum=Web3Provider.get_web3().toBytes(hexstr=ddo.asset_id),
url=ddo_service_endpoint,
account=publisher_account,
cap=cap,
royalties=royalties,
providers=providers,
activity_id=activity_id,
attributes=attributes
)
if mint > 0:
self._keeper.did_registry.mint(ddo.asset_id, mint, account=publisher_account)
else:
registered_on_chain = self._keeper.did_registry.register(
did_seed,
checksum=Web3Provider.get_web3().toBytes(hexstr=ddo.asset_id),
url=ddo_service_endpoint,
account=publisher_account,
cap=cap,
royalties=royalties,
providers=providers,
activity_id=activity_id,
attributes=attributes
)
if registered_on_chain is False:
logger.warning(f'Registering {did} on-chain failed.')
return None
logger.info(f'Successfully registered DDO (DID={did}) on chain.')
try:
# publish the new ddo
response = self._get_metadata_provider().publish_asset_ddo(ddo)
logger.info('Asset/ddo published successfully in Metadata.')
except ValueError as ve:
raise ValueError(f'Invalid value to publish in the metadata: {str(ve)}')
except Exception as e:
logger.error(f'Publish asset in Metadata failed: {str(e)}')
if not response:
return None
return ddo
def register_ddo(metadata,
account,
providers,
auth_service,
additional_service_descriptors,
royalties=None,
cap=None,
mint=0):
keeper = keeper_instance()
metadata_api = Metadata('http://172.17.0.1:5000')
ddo = DDO()
ddo_service_endpoint = metadata_api.get_service_endpoint()
metadata_service_desc = ServiceDescriptor.metadata_service_descriptor(
metadata, ddo_service_endpoint)
authorization_service_attributes = {
"main": {
"service": auth_service,
"publicKey": "0xd7"
}
}
service_descriptors = [
ServiceDescriptor.authorization_service_descriptor(
authorization_service_attributes, 'http://localhost:12001')
]
service_descriptors += [metadata_service_desc]
service_descriptors += additional_service_descriptors
services = ServiceFactory.build_services(service_descriptors)
checksums = dict()
for service in services:
try:
checksums[str(service.index)] = checksum(service.main)
except Exception as e:
pass
# Adding proof to the ddo.
ddo.add_proof(checksums, account)
did_seed = checksum(ddo.proof['checksum'])
asset_id = keeper.did_registry.hash_did(did_seed, account.address)
ddo._did = DID.did(asset_id)
did = ddo._did
for service in services:
if service.type == ServiceTypes.ASSET_ACCESS or service.type == ServiceTypes.NFT_ACCESS or service.type == ServiceTypes.ASSET_ACCESS_PROOF:
access_service = ServiceFactory.complete_access_service(
did, service.service_endpoint, service.attributes,
keeper.access_template.address,
keeper.escrow_payment_condition.address, service.type)
ddo.add_service(access_service)
elif service.type == ServiceTypes.CLOUD_COMPUTE:
compute_service = ServiceFactory.complete_compute_service(
did, service.service_endpoint, service.attributes,
keeper.compute_execution_condition.address,
keeper.escrow_payment_condition.address)
ddo.add_service(compute_service)
elif service.type == ServiceTypes.NFT_SALES:
nft_sales_service = ServiceFactory.complete_nft_sales_service(
did, service.service_endpoint, service.attributes,
keeper.nft_sales_template.address,
keeper.escrow_payment_condition.address, service.type)
ddo.add_service(nft_sales_service)
else:
ddo.add_service(service)
ddo.proof['signatureValue'] = keeper.sign_hash(did_to_id_bytes(did),
account)
ddo.add_public_key(did, account.address)
ddo.add_authentication(did, PUBLIC_KEY_TYPE_RSA)
try:
_oldddo = metadata_api.get_asset_ddo(ddo.did)
if _oldddo:
metadata_api.retire_asset_ddo(ddo.did)
except ValueError:
pass
if 'files' in metadata['main']:
if auth_service == ServiceAuthorizationTypes.SECRET_STORE:
encrypted_files = do_secret_store_encrypt(
remove_0x_prefix(ddo.asset_id),
json.dumps(metadata['main']['files']), account, get_config())
elif auth_service == ServiceAuthorizationTypes.PSK_RSA:
encrypted_files, public_key = rsa_encryption_from_file(
json.dumps(metadata['main']['files']),
get_rsa_public_key_file())
else:
encrypted_files, public_key = ecdsa_encryption_from_file(
json.dumps(metadata['main']['files']), get_provider_key_file(),
get_provider_password())
_files = metadata['main']['files']
# only assign if the encryption worked
if encrypted_files:
index = 0
for file in metadata['main']['files']:
file['index'] = index
index = index + 1
del file['url']
metadata['encryptedFiles'] = encrypted_files
ddo_with_did = DDO(did,
json_text=ddo.as_text().replace('/{did}', '/' + did))
ddo_service_endpoint = ddo_service_endpoint.replace('/{did}', '/' + did)
if mint > 0 or royalties is not None or cap is not None:
keeper.did_registry.register_mintable_did(
did_seed,
checksum=web3().toBytes(hexstr=ddo.asset_id),
url=ddo_service_endpoint,
cap=cap,
royalties=royalties,
account=account,
providers=providers)
if mint > 0:
keeper.did_registry.mint(ddo.asset_id, mint, account=account)
else:
keeper_instance().did_registry.register(
did_seed,
checksum=web3().toBytes(hexstr=ddo.asset_id),
url=ddo_service_endpoint,
account=account,
providers=providers)
metadata_api.publish_asset_ddo(ddo_with_did)
return ddo_with_did