def buy_asset():
"""
Requires all ocean services running.
"""
ConfigProvider.set_config(ExampleConfig.get_config())
config = ConfigProvider.get_config()
# make ocean instance
ocn = Ocean()
acc = get_publisher_account(config)
if not acc:
acc = ([acc for acc in ocn.accounts.list() if acc.password] or ocn.accounts.list())[0]
# Register ddo
ddo = ocn.assets.create(Metadata.get_example(), acc, providers=[acc.address])
logging.info(f'registered ddo: {ddo.did}')
# ocn here will be used only to publish the asset. Handling the asset by the publisher
# will be performed by the Brizo server running locally
keeper = Keeper.get_instance()
if 'TEST_LOCAL_NILE' in os.environ and os.environ['TEST_LOCAL_NILE'] == '1':
provider = keeper.did_registry.to_checksum_address(
'0x413c9ba0a05b8a600899b41b0c62dd661e689354'
)
keeper.did_registry.add_provider(ddo.asset_id, provider, acc)
logging.debug(f'is did provider: '
f'{keeper.did_registry.is_did_provider(ddo.asset_id, provider)}')
cons_ocn = Ocean()
consumer_account = get_account_from_config(config, 'parity.address1', 'parity.password1')
# sign agreement using the registered asset did above
service = ddo.get_service(service_type=ServiceTypes.ASSET_ACCESS)
# This will send the purchase request to Brizo which in turn will execute the agreement on-chain
cons_ocn.accounts.request_tokens(consumer_account, 100)
sa = ServiceAgreement.from_service_dict(service.as_dictionary())
agreement_id = cons_ocn.assets.order(
ddo.did, sa.service_definition_id, consumer_account)
logging.info('placed order: %s, %s', ddo.did, agreement_id)
i = 0
while ocn.agreements.is_access_granted(
agreement_id, ddo.did, consumer_account.address) is not True and i < 30:
time.sleep(1)
i += 1
assert ocn.agreements.is_access_granted(agreement_id, ddo.did, consumer_account.address)
ocn.assets.consume(
agreement_id,
ddo.did,
sa.service_definition_id,
consumer_account,
config.downloads_path)
logging.info('Success buying asset.')
