def query_channels(self, requestor, peer_names, request_channel='mychannel', timeout=10):
"""
Queries channel name joined by a peer
:param requestor: User role who issue the request
:param peer_names: Names of the peers to install
:param request_channel: Name of the channel that the query sent to
:return: A `ChannelQueryResponse`
"""
peers = []
for peer_name in peer_names:
peer = self.get_peer(peer_name)
peers.append(peer)
request = create_tx_prop_req(
prop_type=CC_QUERY,
fcn='GetChannels',
cc_name='cscc',
cc_type=CC_TYPE_GOLANG,
args=[]
)
tx_context = create_tx_context(requestor, ecies(), TXProposalRequest())
tx_context.tx_prop_req = request
response = Channel(request_channel, self).send_tx_proposal(
tx_context, peers)
queue = Queue(1)
response.subscribe(
on_next=lambda x: queue.put(x),
on_error=lambda x: queue.put(x)
)
try:
res = queue.get(timeout=timeout)
_logger.debug(res)
response = res[0][0][0]
if response.response:
query_trans = query_pb2.ChannelQueryResponse()
query_trans.ParseFromString(res[0][0][0].response.payload)
for ch in query_trans.channels:
_logger.debug('channel id {}'.format(
ch.channel_id))
return query_trans
return response
except Exception:
_logger.error(
"Failed to query channel: {}", sys.exc_info()[0])
raise
def query_installed_chaincodes(self, requestor, peer_names, channel_name='mychannel', timeout=10):
"""
Queries installed chaincode, returns all chaincodes installed on a peer
:param requestor: User role who issue the request
:param peer_names: Names of the peers to query
:param channel_name: Name of the channel to send query to
:return: A `ChaincodeQueryResponse`
"""
peers = []
for peer_name in peer_names:
peer = self.get_peer(peer_name)
peers.append(peer)
request = create_tx_prop_req(
prop_type=CC_QUERY,
fcn='getinstalledchaincodes',
cc_name='lscc',
cc_type=CC_TYPE_GOLANG,
args=[]
)
tx_context = create_tx_context(requestor, ecies(), TXProposalRequest())
tx_context.tx_prop_req = request
response = Channel(channel_name, self).send_tx_proposal(
tx_context, peers)
queue = Queue(1)
response.subscribe(
on_next=lambda x: queue.put(x),
on_error=lambda x: queue.put(x)
)
try:
res = queue.get(timeout=timeout)
_logger.debug(res)
response = res[0][0][0]
if response.response:
query_trans = query_pb2.ChaincodeQueryResponse()
query_trans.ParseFromString(res[0][0][0].response.payload)
for cc in query_trans.chaincodes:
_logger.debug('cc name {}, version {}, path {}'.format(
cc.name, cc.version, cc.path))
return query_trans
return response
except Exception:
_logger.error(
"Failed to query installed chaincodes: {}", sys.exc_info()[0])
raise