async def get_block_info(org_name: str,
user_name: str,
user_password: str,
channel_name: str = constants.channel_name) -> str:
"""
Fetches the blockchain state of the given channel
Args:
org_name: Name of the submitting user's organization
user_name: Username of the submitter
user_password: Password of the submitting user
channel_name: Name of the channel on which to connect client
Returns:
String of blockchain info
"""
# Setup a HF network client
hf_client = Client(net_profile=constants.config_path)
# Connect to the given channel
hf_client.new_channel(channel_name)
# Gather information about the network
network_info = hf_client.get_net_info()
# For queries, we only need a single peer
# Here we will randomly select one from our org
peers = network_info['organizations'][org_name]['peers']
random_peer = random.choice(peers)
user = enroll_user(hf_client, org_name, user_name, user_password)
response = await hf_client.query_info(requestor=user,
channel_name=channel_name,
peers=[random_peer])
return str(response)
def QueryClient():
loop = asyncio.get_event_loop()
cli = Client(net_profile="../connection-profile/network.json")
org1_admin = cli.get_user('org1.example.com', 'Admin')
org2_admin = cli.get_user('org2.example.com', 'Admin')
# Make the client know there is a channel in the network
cli.new_channel('modbuschannel')
# Install Example Chaincode to Peers
# GOPATH setting is only needed to use the example chaincode inside sdk
gopath_bak = os.environ.get('GOPATH', '')
gopath = os.path.normpath(
os.path.join(os.path.dirname(os.path.realpath('__file__')),
'../chaincode'))
os.environ['GOPATH'] = os.path.abspath(gopath)
# Query a chaincode
args = ["server"]
# The response should be true if succeed#
response = loop.run_until_complete(
cli.chaincode_query(requestor=org1_admin,
channel_name='modbuschannel',
peers=['peer0.org1.example.com'],
args=args,
cc_name='registration_cc_v2'))
response = json.loads(response)
return (response)
async def invoke(org_name: str, user_name: str, user_password: str,
channel_name: str, function: str, args: List[str]) -> str:
"""
Submits a blockchain transaction invocation to all the peers in
the network.
Args:
org_name: Name of the submitting user's organization
user_name: Username of the submitter
user_password: Password of the submitting user
channel_name: Name of the channel on which to connect client
function: Name of the chaincode function to invoke
args: A list of string arguments passed to the chaincode
Returns:
Response string from the *first* peer that responded with
confirmation of the execution.
"""
# Setup a HF network client
hf_client = Client(net_profile=constants.config_path)
# Connect to the given channel
hf_client.new_channel(channel_name)
# Gather information about the network
network_info = hf_client.get_net_info()
# Invocations require read/write sets from as many peers
# as specified in the endorsement policy. Here we will
# go ahead and request endorsement from ALL peers.
# If your policy requires only a subset, you may wish to
# alter this section
peers = []
for org in network_info['organizations'].keys():
if 'peers' in network_info['organizations'][org]:
for peer in network_info['organizations'][org]['peers']:
peers.append(peer)
# Enroll the user that will be invoking the query
user = enroll_user(hf_client, org_name, user_name, user_password)
# Submit the query to the peers and await a response
response = await hf_client.chaincode_invoke(
requestor=user,
channel_name=channel_name,
peers=peers,
fcn=function,
args=args,
cc_name=constants.chaincode_name,
transient_map=None, # optional, for private data
wait_for_event=
True, # for being sure chaincode invocation has been commited in the ledger, default is on tx event
)
if not response:
raise ValueError(
f'Failure to invoke chaincode function {function} with response: {response}'
)
return response
async def main():
cli = Client(net_profile=os.path.join(dir_path, '../network.json'))
admin_owkin = cli.get_user('owkin', 'admin')
cli.new_channel('mychannel')
peer = cli.get_peer('peer1-owkin')
events = cli.get_events(admin_owkin,
peer,
'mychannel',
start=0,
filtered=True)
async for v in cli.getEvents(events):
print(v)
async def get_instantiated_chaincodes(
org_name: str,
user_name: str,
user_password: str,
channel_name: str = constants.channel_name) -> List[Dict[str, str]]:
"""
Fetches the blockchain state of the given channel
Args:
org_name: Name of the submitting user's organization
user_name: Username of the submitter
user_password: Password of the submitting user
channel_name: Name of the channel on which to connect client
Returns:
List of instantiated chaincodes, each of which contains:
'Name': Chaincode name,
'Version': Chaincode version,
'Path': GOPATH relative chaincode location
"""
# Setup a HF network client
hf_client = Client(net_profile=constants.config_path)
# Connect to the given channel
hf_client.new_channel(channel_name)
# Gather information about the network
network_info = hf_client.get_net_info()
# For queries, we only need a single peer
# Here we will randomly select one from our org
peers = network_info['organizations'][org_name]['peers']
random_peer = random.choice(peers)
user = enroll_user(hf_client, org_name, user_name, user_password)
response = await hf_client.query_instantiated_chaincodes(
requestor=user, channel_name=channel_name, peers=[random_peer])
chaincodes = []
for chaincode in response[0].chaincodes:
code = {
'Name': chaincode.name,
'Version': chaincode.version,
'Path': chaincode.path
}
chaincodes.append(code)
return chaincodes
async def query(org_name: str, user_name: str, user_password: str,
channel_name: str, function: str, args: List[str]) -> str:
"""
Submits a ledger query to a single peer within the specified org.
Note that queries will NOT submit any changes to the ledger state,
even if an invocation query function is invoked.
Args:
org_name: Name of the submitting user's organization
user_name: Username of the submitter
user_password: Password of the submitting user
channel_name: Name of the channel on which to connect client
function: Name of the chaincode function to invoke
args: A list of string arguments passed to the chaincode
Returns:
Response string from the given peer
"""
# Setup a HF network client
hf_client = Client(net_profile=constants.config_path)
# Connect to the given channel
hf_client.new_channel(channel_name)
# Gather information about the network
network_info = hf_client.get_net_info()
# For queries, we only need a single peer
# Here we will randomly select one from our org
peers = network_info['organizations'][org_name]['peers']
random_peer = random.choice(peers)
# Enroll the user that will be invoking the query
user = enroll_user(hf_client, org_name, user_name, user_password)
# Submit the query to the selected peer and await a response
response = await hf_client.chaincode_query(
requestor=user,
channel_name=channel_name,
fcn=function,
peers=[random_peer],
args=args,
cc_name=constants.chaincode_name)
if not response:
raise ValueError(
f'Failure to query chaincode function {function} with response: {response}'
)
return response
def wait():
with get_event_loop() as loop:
channel_name = LEDGER['channel_name']
chaincode_name = LEDGER['chaincode_name']
peer = LEDGER['peer']
peer_port = peer["port"][os.environ.get('BACKEND_PEER_PORT',
'external')]
client = Client()
channel = client.new_channel(channel_name)
target_peer = Peer(name=peer['name'])
requestor_config = LEDGER['client']
target_peer.init_with_bundle({
'url': f'{peer["host"]}:{peer_port}',
'grpcOptions': peer['grpcOptions'],
'tlsCACerts': {
'path': peer['tlsCACerts']
},
'clientKey': {
'path': peer['clientKey']
},
'clientCert': {
'path': peer['clientCert']
},
})
try:
# can fail
requestor = create_user(
name=requestor_config['name'] + '_events',
org=requestor_config['org'],
state_store=FileKeyValueStore(requestor_config['state_store']),
msp_id=requestor_config['msp_id'],
key_path=glob.glob(requestor_config['key_path'])[0],
cert_path=requestor_config['cert_path'])
except BaseException:
pass
else:
channel_event_hub = channel.newChannelEventHub(
target_peer, requestor)
# use chaincode event
# uncomment this line if you want to replay blocks from the beginning for debugging purposes
# stream = channel_event_hub.connect(start=0, filtered=False)
stream = channel_event_hub.connect(filtered=False)
channel_event_hub.registerChaincodeEvent(chaincode_name,
'tuples-updated',
onEvent=on_tuples)
loop.run_until_complete(stream)
def requestGetEntity(net_profile, organization, user, channel, peer, chaincode, function, arg0):
loop = asyncio.get_event_loop()
cli = Client(net_profile=net_profile)
org1_admin = cli.get_user(organization, user)
cli.new_channel(channel)
gopath = os.path.normpath(os.path.join(os.path.dirname(
os.path.realpath('__file__')), '../chaincode'))
os.environ['GOPATH'] = os.path.abspath(gopath)
args = [arg0]
response = loop.run_until_complete(cli.chaincode_invoke(
requestor=org1_admin,
channel_name=channel,
peers=[peer],
args=args,
cc_name=chaincode,
transient_map=None,
wait_for_event=True,
fcn=function,
))
return response
async def register_user(org_name: str,
request: constants.RegisterUserRequest) -> str:
"""
Registers a user to the Org's Fabric CA Server
Args:
org_name: Organization's name
request: RegisterUserRequest object containing
registration information
Returns:
Pre-generated user secret
"""
# Create/Open a wallet on a temp path including the org name
# Org name must be included, otherwise usernames must be unique
# over all orgs
wallet_path = os.path.join(os.getcwd(), 'tmp', 'hfc-kvs', org_name)
cred_wallet = wallet.FileSystenWallet(path=wallet_path) # [sic]
# Setup a HF network client
hf_client = Client(net_profile=constants.config_path)
hf_client.new_channel(constants.channel_name)
# Extract CA info
network_info = hf_client.get_net_info()
org_info = network_info['organizations'][org_name]
ca_name = org_info['certificateAuthorities'][0]
ca_info = network_info['certificateAuthorities'][ca_name]
# if user already exists, pull ID from storage
if cred_wallet.exists(request.user_name):
return None
casvc = ca_service(target=ca_info['url'])
admin_enrollment = casvc.enroll(request.admin_user_name,
request.admin_password)
secret = admin_enrollment.register(enrollmentID=request.user_name,
enrollmentSecret=request.user_password,
role=request.role,
affiliation=request.affiliation,
attrs=[dict(x) for x in request.attrs])
return secret
class FabricInitializer:
"""This provides the proper fabric client wrapper
"""
def __init__(self,
net_profile=None,
channel_name=None,
cc_name=None,
cc_version=None,
org_name=None,
user_name=None,
peer_name=None):
self.client = Client(net_profile=net_profile)
assert self.client
print("---client---")
print(self.client.orderers)
print(self.client.peers)
print("---client---")
self.channel_name = channel_name
self.channel = self.client.new_channel(channel_name)
print("---channel---")
print("client channels: ", self.client._channels)
print("channel: ", self.client.get_channel(channel_name))
print("channel name: ", self.client.get_channel(channel_name).name)
print("channel peers: ", self.client.get_channel(channel_name).peers)
print("channel orderers: ",
self.client.get_channel(channel_name).orderers)
print("---channel---")
assert self.channel
self.cc_name = cc_name
self.cc_version = cc_version
self.user = self.client.get_user(org_name, user_name)
assert self.user
self.peers = [self.client.get_peer(peer_name)]
assert self.peers
print("---parameters---")
print("User: "******"Peers: ", self.peers)
print("cc name:", self.cc_name)
print("---parameters---")
self.hub = None
self.reg_nub = None
async def get_height(self):
info = await self.client.query_info(self.user, self.channel_name,
self.peers)
return info.height
def InvokeServer():
loop = asyncio.get_event_loop()
cli = Client(net_profile="../connection-profile/network.json")
org1_admin = cli.get_user('org1.example.com', 'Admin')
org2_admin = cli.get_user('org2.example.com', 'Admin')
# Make the client know there is a channel in the network
cli.new_channel('modbuschannel')
# Install Example Chaincode to Peers
# GOPATH setting is only needed to use the example chaincode inside sdk#
gopath_bak = os.environ.get('GOPATH', '')
gopath = os.path.normpath(os.path.join(
os.path.dirname(os.path.realpath('__file__')),
'../chaincode'
))
os.environ['GOPATH'] = os.path.abspath(gopath)
# Invoke a chaincode
#args = ["client", "Qmeq4hW6k34a5dbpE2vc7FjSX1xmn1tphg2hGrHFGxqk16"]
host_ip = socket.gethostbyname(socket.gethostname())
name=host_ip.encode("utf-8")
arg2=base64.b64encode(hashlib.sha256(name).digest())
args = ["server", arg2]
# The response should be true if succeed
response = loop.run_until_complete(cli.chaincode_invoke(
requestor=org2_admin,
channel_name='modbuschannel',
peers=['peer0.org2.example.com'],
args=args,
cc_name='registration_cc_v2',
transient_map=None, # optional, for private data
# for being sure chaincode invocation has been commited in the ledger, default is on tx event
wait_for_event=True,
# cc_pattern='^invoked*' # if you want to wait for chaincode event and you have a `stub.SetEvent("invoked", value)` in your chaincode
))
import asyncio
from hfc.fabric import Client
loop = asyncio.get_event_loop()
cli = Client(
net_profile=
"/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json"
)
org1_admin = cli.get_user('org1.dz', 'Admin')
org1_admin = cli.get_user(org_name='org1.dz', name='Admin')
# Make the client know there is a channel in the network
cli.new_channel('firstchannel')
# Install Example Chaincode to Peers
# The response should be true if succeed
responses = loop.run_until_complete(
cli.chaincode_install(requestor=org1_admin,
peers=[
'peer0.org1.dz', 'peer1.org1.dz',
'peer2.org1.dz', 'peer3.org1.dz'
],
cc_path='chaincodes',
cc_name='first_chaincode',
cc_version='v1.0'))
print(responses)
import asyncio
from hfc.fabric import Client
loop = asyncio.get_event_loop()
cli = Client(
net_profile=
"/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json"
)
org1_admin = cli.get_user('org1.dz', 'Admin')
org1_admin = cli.get_user(org_name='org1.dz', name='Admin')
# Make the client know there is a channel in the network
cli.new_channel('secondchannel')
# Instantiate Chaincode in Channel, the response should be true if succeed
args = ['a', '200', 'b', '300']
# policy, see https://hyperledger-fabric.readthedocs.io/en/release-1.4/endorsement-policies.html
policy = {
"identities": [{
"role": {
"name": "member",
"mspId": "PeerOrg1MSP"
}
}],
"policy": {
"1-of": [{
"signed-by": 0
}]
# your policy
policy = {
"identities": [{
"role": {
"name": "member",
"mspId": "PeerOrg1MSP"
}
}],
"policy": {
"1-of": [{
"signed-by": 0
}]
},
}
cli.new_channel("firstchannel")
cli.new_channel("secondchannel")
# Creating the two channels
response = loop.run_until_complete(
cli.channel_create(
orderer="orderer1.org1.dz",
channel_name="firstchannel",
requestor=org1_admin,
config_yaml="/*****************YOUR_PATH*****************/",
channel_profile="firstchannel",
))
response = loop.run_until_complete(
cli.channel_create(
orderer="orderer1.org1.dz",
peers=['peer0.org1.example.com']))
print("Query installed chaincode.")
print(response)
# query channels joined in by given peers
response = loop.run_until_complete(
cli.query_channels(requestor=org1_admin,
peers=['peer0.org1.example.com']))
print("Channels: ", response)
# check if channel named "businesschannel" is already exists
response = cli.get_channel(name="businesschannel")
print("Channel named `businesschannel`: ", response)
# previously created channel must be declared with new_channel() for future using
response = cli.new_channel(name="businesschannel")
print("New add channel: ", response)
response = cli.get_channel(name="businesschannel")
print("Channel named `businesschannel`: ", response)
# query channel info of a given channel named "businesschannel"
response = loop.run_until_complete(
cli.query_info(requestor=org1_admin,
channel_name="businesschannel",
peers=['peer0.org1.example.com']))
print("Channels: ", response)
# Get channel config
response = loop.run_until_complete(
cli.get_channel_config(requestor=org1_admin,
channel_name='businesschannel',
def get_hfc_client():
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
client = Client()
# Add peer from backend ledger config file
peer = Peer(name=LEDGER['peer']['name'])
peer.init_with_bundle({
'url': f'{LEDGER["peer"]["host"]}:{PEER_PORT}',
'grpcOptions': LEDGER['peer']['grpcOptions'],
'tlsCACerts': {
'path': LEDGER['peer']['tlsCACerts']
},
'clientKey': {
'path': LEDGER['peer']['clientKey']
},
'clientCert': {
'path': LEDGER['peer']['clientCert']
},
})
client._peers[LEDGER['peer']['name']] = peer
# Check peer has joined channel
response = loop.run_until_complete(
client.query_channels(requestor=LEDGER['requestor'],
peers=[peer],
decode=True))
channels = [ch.channel_id for ch in response.channels]
if not LEDGER['channel_name'] in channels:
raise Exception(
f'Peer has not joined channel: {LEDGER["channel_name"]}')
channel = client.new_channel(LEDGER['channel_name'])
# Check chaincode is instantiated in the channel
responses = loop.run_until_complete(
client.query_instantiated_chaincodes(
requestor=LEDGER['requestor'],
channel_name=LEDGER['channel_name'],
peers=[peer],
decode=True))
chaincodes = [cc.name for resp in responses for cc in resp.chaincodes]
if not LEDGER['chaincode_name'] in chaincodes:
raise Exception(
f'Chaincode : {LEDGER["chaincode_name"]}'
f' is not instantiated in the channel : {LEDGER["channel_name"]}')
# Discover orderers and peers from channel discovery
results = loop.run_until_complete(
channel._discovery(LEDGER['requestor'],
peer,
config=True,
local=False,
interests=[{
'chaincodes': [{
'name': LEDGER['chaincode_name']
}]
}]))
results = deserialize_discovery(results)
update_client_with_discovery(client, results)
return loop, client
def wait(channel_name):
def on_channel_event(cc_event, block_number, tx_id, tx_status):
on_event(channel_name, cc_event, block_number, tx_id, tx_status)
with get_event_loop() as loop:
client = Client()
channel = client.new_channel(channel_name)
target_peer = Peer(name=settings.LEDGER_PEER_NAME)
target_peer.init_with_bundle({
'url':
f'{settings.LEDGER_PEER_HOST}:{settings.LEDGER_PEER_PORT}',
'grpcOptions':
ledger_grpc_options(settings.LEDGER_PEER_HOST),
'tlsCACerts': {
'path': settings.LEDGER_PEER_TLS_CA_CERTS
},
'clientKey': {
'path': settings.LEDGER_PEER_TLS_CLIENT_KEY
},
'clientCert': {
'path': settings.LEDGER_PEER_TLS_CLIENT_CERT
},
})
try:
# can fail
requestor = create_user(name=f'{settings.LEDGER_USER_NAME}_events',
org=settings.ORG_NAME,
state_store=FileKeyValueStore(
settings.LEDGER_CLIENT_STATE_STORE),
msp_id=settings.LEDGER_MSP_ID,
key_path=glob.glob(
settings.LEDGER_CLIENT_KEY_PATH)[0],
cert_path=settings.LEDGER_CLIENT_CERT_PATH)
except BaseException:
pass
else:
# Note:
# We do a loop to connect to the channel event hub because grpc may disconnect and create an exception
# Since we're in a django app of backend, an exception here will not crash the server (if the "ready"
# method has already returned "true").
# It makes it difficult to reconnect automatically because we need to kill the server
# to trigger the connexion.
# So we catch this exception (RPC error) and retry to connect to the event loop.
while True:
# use chaincode event
channel_event_hub = channel.newChannelEventHub(
target_peer, requestor)
try:
# We want to replay blocks from the beginning (start=0) if channel event hub was disconnected during
# events emission
stream = channel_event_hub.connect(start=0, filtered=False)
channel_event_hub.registerChaincodeEvent(
settings.LEDGER_CHANNELS[channel_name]['chaincode']
['name'],
'chaincode-updates',
onEvent=on_channel_event)
logger.info(
f'Connect to Channel Event Hub ({channel_name})')
loop.run_until_complete(stream)
except Exception as e:
logger.error(
f'Channel Event Hub failed for {channel_name} ({type(e)}): {e} re-connecting in 5s'
)
time.sleep(5)
from hfc.fabric.transaction.tx_proposal_request import create_tx_prop_req, CC_INVOKE, CC_TYPE_NODE, CC_INSTANTIATE, CC_INSTALL, TXProposalRequest
loop = asyncio.get_event_loop()
cli = Client(net_profile="connection-profile.json")
# NlClient = cli.get_user('netherlands.nl', 'user1Nl')
fs_wallet = wallet.FileSystenWallet(
"./tmp/hfc-kvs") # Opens wallet at ./tmp/hfc-kvs
user1Nl = fs_wallet.create_user(
"user1Nl", "Netherlands", "NetherlandsMSP"
) # Returns an instance of the user object with the newly created credentials
# Make the client know there is a channel in the network
cli.new_channel('common')
# Invoke a chaincode
args = []
# The response should be true if succeed
response = loop.run_until_complete(
cli.chaincode_invoke(
requestor=user1Nl,
channel_name='common',
peers=['peer0.netherlands.nl'],
args=args,
cc_name='access-chaincode',
cc_type=CC_TYPE_NODE,
wait_for_event_timeout=3000,
transient_map=None, # optional, for private data
import os
import asyncio
from hfc.fabric import Client
loop = asyncio.get_event_loop()
cli = Client(net_profile="../connection-profile/network.json")
org1_admin = cli.get_user('org1.example.com', 'Admin')
org2_admin = cli.get_user('org2.example.com', 'Admin')
# Make the client know there is a channel in the network
cli.new_channel('channel1')
# Install Example Chaincode to Peers
# GOPATH setting is only needed to use the example chaincode inside sdk
gopath_bak = os.environ.get('GOPATH', '')
gopath = os.path.normpath(
os.path.join(os.path.dirname(os.path.realpath('__file__')),
'../chaincode'))
os.environ['GOPATH'] = os.path.abspath(gopath)
print("gopath", gopath)
# The response should be true if succeed
responses = loop.run_until_complete(
cli.chaincode_install(requestor=org1_admin,
peers=['peer0.org1.example.com'],
cc_path='github.com/usecase_cc',
cc_name='usecase_cc',
cc_version='v1.0'))
import asyncio
from hfc.fabric import Client
import os
import json
loop = asyncio.get_event_loop()
dir_path = os.path.dirname(os.path.abspath(__file__))
cli = Client(net_profile=os.path.join(dir_path, "example_server_network.json"))
# Make the client know there is a channel in the network
cli.new_channel('mychannel')
class OperateChaincode():
"""
Initialize common parameters: requestor, channel_name, peers, cc_name
requestor: user role who issue the request
channel_name: the name of the channel to send tx proposal
peers: list of peer name and/or peer to install
cc_name: chaincode name
"""
def __init__(self, requestor, channel_name, peers, cc_name):
self.requestor = requestor
self.channel_name = channel_name
self.peers = peers
self.cc_name = cc_name
#Call python SDK for query
def query(self, args):
return loop.run_until_complete(
cli.chaincode_query(requestor=self.requestor,
channel_name=self.channel_name,
import asyncio
import random
from hfc.fabric import Client
import middleware.constants as constants
import middleware.operations as operations
from middleware.access_utils import enroll_user
org_name = 'appdevorg.beatchain.com'
admin_user_name = 'admin'
admin_password = '******'
function = 'ListBankAccounts'
admin_fee_frac = 0.5
hf_client = Client(net_profile=constants.config_path)
hf_client.new_channel(constants.channel_name)
network_info = hf_client.get_net_info()
peers = network_info['organizations'][org_name]['peers']
random_peer = random.choice(peers)
user = enroll_user(hf_client, org_name, user_name, user_password)
user = hf_client.get_user(org_name=org_name, name='Admin')
loop = asyncio.get_event_loop()
response = loop.run_until_complete(
operations.invoke('appdevorg.beatchain.com',
admin_user_name,
admin_password,
def _get_hfc(channel_name):
global user
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
if not user:
with user_lock:
# Only call `create_user` once in the lifetime of the application.
# Calling `create_user` twice breaks thread-safety (bug in fabric-sdk-py)
user = create_user(name=settings.LEDGER_USER_NAME,
org=settings.ORG_NAME,
state_store=FileKeyValueStore(
settings.LEDGER_CLIENT_STATE_STORE),
msp_id=settings.LEDGER_MSP_ID,
key_path=glob.glob(
settings.LEDGER_CLIENT_KEY_PATH)[0],
cert_path=settings.LEDGER_CLIENT_CERT_PATH)
client = Client()
# Add peer from backend ledger config file
peer = Peer(name=settings.LEDGER_PEER_NAME)
peer.init_with_bundle({
'url':
f'{settings.LEDGER_PEER_HOST}:{settings.LEDGER_PEER_PORT}',
'grpcOptions':
ledger_grpc_options(settings.LEDGER_PEER_HOST),
'tlsCACerts': {
'path': settings.LEDGER_PEER_TLS_CA_CERTS
},
'clientKey': {
'path': settings.LEDGER_PEER_TLS_CLIENT_KEY
},
'clientCert': {
'path': settings.LEDGER_PEER_TLS_CLIENT_CERT
},
})
client._peers[settings.LEDGER_PEER_NAME] = peer
# Check peer has joined channel
response = loop.run_until_complete(
client.query_channels(requestor=user, peers=[peer], decode=True))
channels = [ch.channel_id for ch in response.channels]
if channel_name not in channels:
raise Exception(f'Peer has not joined channel: {channel_name}')
channel = client.new_channel(channel_name)
# This part is commented because `query_committed_chaincodes` is not implemented in
# the last version of fabric-sdk-py
# chaincode_name = settings.LEDGER_CHANNELS[channel_name]['chaincode']['name']
# /!\ New chaincode lifecycle.
# Check chaincode is committed in the channel
# responses = loop.run_until_complete(
# client.query_committed_chaincodes(
# requestor=user,
# channel_name=channel_name,
# peers=[peer],
# decode=True
# )
# )
# chaincodes = [cc.name
# for resp in responses
# for cc in resp.chaincode_definitions]
# if chaincode_name not in chaincodes:
# raise Exception(f'Chaincode : {chaincode_name}'
# f' is not committed in the channel : {channel_name}')
# Discover orderers and peers from channel discovery
results = loop.run_until_complete(
channel._discovery(user,
peer,
config=True,
local=False,
interests=[{
'chaincodes': [{
'name': "_lifecycle"
}]
}]))
results = _deserialize_discovery(results)
_validate_channels(channel_name, results)
_update_client_with_discovery(client, results)
return loop, client, user
class FabricILStateManager(LocalILStateManger):
def __init__(self,
net_profile: Path,
channel_name: str,
cc_name: str,
cc_version: str,
org_name: str,
user_name: str,
peer_name: str) -> None:
self.entries_ready = [] # to store list of json objects
self.entries_responded = [] # to store list of json objects
self.client = Client(net_profile=net_profile)
if not self.client:
raise ValueError("Invalid network profile.")
self.channel_name = channel_name
self.channel = self.client.new_channel(channel_name)
print(f'HF state manager - channel: {self.channel}')
self.cc_name = cc_name
self.cc_version = cc_version
self.user = self.client.get_user(org_name, user_name)
print(f'HF state manager - orgs: {self.client.organizations}')
print(self.client.organizations['Org1MSP']._users)
print(f'HF state manager - user: {self.user}')
self.peers = [self.client.get_peer(peer_name)]
print(f'HF state manager - peers: {self.peers}')
self.hub = None
self.reg_num = None
self.events = []
async def get_height(self):
info = await self.client.query_info(self.user, self.channel_name, self.peers)
return info.height
async def create_entry(self,
id: str,
transfer: Transfer) -> bool:
payload = transfer.payload
nonce, data = payload.nonce, payload.data
try:
await self.client.chaincode_invoke(
requestor=self.user,
peers=self.peers,
channel_name=self.channel_name,
cc_name=self.cc_name,
cc_version=self.cc_version,
fcn="createTransferEntry",
args=[nonce, data],
wait_for_event=True)
return True
except Exception as e:
print(e)
return False
async def signal_send_acceptance(self,
id: str,
signal_acceptance: bool = True) -> bool:
try:
await self.client.chaincode_invoke(
requestor=self.user,
peers=self.peers,
channel_name=self.channel_name,
cc_name=self.cc_name,
cc_version=self.cc_version,
fcn="updateTransferEntry",
args=[id, TransferStatus.READY, signal_acceptance])
return True
except Exception as e:
print(e)
return False
async def update_entry(self,
id: str,
status: TransferStatus,
transfer: Transfer = None) -> bool:
signal_acceptance, result = transfer.send_accepted, transfer.result
try:
await self.client.chaincode_invoke(
requestor=self.user,
peers=self.peers,
channel_name=self.channel_name,
cc_name=self.cc_name,
cc_version=self.cc_version,
fcn="updateTransferEntry",
args=[id, status, signal_acceptance, result])
return True
except Exception as e:
print(e)
return False
async def receive_entry_events(self,
event: TransferStatus) -> None:
self.hub = self.channel.newChannelEventHub(self.peers[0], self.user)
self.reg_num = self.hub.registerBlockEvent(
onEvent=self._event_handler)
if not self.height:
self.height = await self.get_height()
stream = self.hub.connect(filtered=False, start=self.height)
try:
await asyncio.wait_for(stream, timeout=1)
except asyncio.TimeoutError:
pass
self.height = await self.get_height()
if event == TransferStatus.READY:
self.transfers_ready = self._buffer_data(self.entries_ready)
if event == TransferStatus.RESPONDED:
self.transfers_responded = self._buffer_data(self.entries_responded)
# clean up
self.hub.disconnect()
self.hub.unregisterBlockEvent(self.reg_num)
def _event_handler(self, event_obj):
d = event_obj['data']['data']
actions = d[0]['payload']['data']['actions']
action = actions[0]
event = action['payload']['action']['proposal_response_payload']['extension']['events']
event_name = event['event_name']
if event_name == "transferReady":
self.entries_ready.append(event)
if event_name == "transferResponded":
self.entries_responded.append(event)
def _buffer_data(self, events):
res = []
for event in events:
transfer = Transfer()
json_str = event['payload']
t_obj = json.loads(json_str)
transfer.status, = t_obj['status']
transfer.payload = t_obj['payload']
if transfer.status == TransferStatus.RESPONDED:
transfer.send_accepted = t_obj['sendAcceptance']
transfer.result = json.loads(t_obj['result'])
res.append(transfer)
return res
import asyncio
import ast
from hfc.fabric import Client
import json
loop = asyncio.get_event_loop()
cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
org1_admin = cli.get_user('org1.dz', 'User1')
cli.new_channel("firstchannel")
# first get the hash by calling 'query_info'
response = loop.run_until_complete(cli.query_info(
requestor=org1_admin,
channel_name='firstchannel',
peers=['peer0.org1.dz'],
decode=True
))
print(response)
test_hash = response.currentBlockHash
response = loop.run_until_complete(cli.query_block_by_hash(
requestor=org1_admin,
channel_name='firstchannel',
peers=['peer0.org1.dz'],
block_hash=test_hash,
decode=True
))
List_rep_bloc_byte = response.get('data').get('data')[0].get('payload').get('data').get('actions')[0].get('payload').get('action').get('proposal_response_payload').get('extension').get('results').get('ns_rwset')[0].get('rwset').get('writes')[0].get('value')
import os
import asyncio
from hfc.fabric import Client
loop = asyncio.get_event_loop()
cli = Client(net_profile="../connection-profile/network.json")
org1_admin = cli.get_user('org1.example.com', 'Admin')
org2_admin = cli.get_user('org2.example.com', 'Admin')
# Make the client know there is a channel in the network
cli.new_channel('modbuschannel')
# Install Example Chaincode to Peers
# GOPATH setting is only needed to use the example chaincode inside sdk
gopath_bak = os.environ.get('GOPATH', '')
gopath = os.path.normpath(
os.path.join(os.path.dirname(os.path.realpath('__file__')),
'../chaincode'))
os.environ['GOPATH'] = os.path.abspath(gopath)
# Query a chaincode
args = ['b']
# The response should be true if succeed
response = loop.run_until_complete(
cli.chaincode_query(requestor=org1_admin,
channel_name='modbuschannel',
peers=['peer0.org1.example.com'],
args=args,
cc_name='example_cc'))
class Smartmeter():
'''A class define what each noeud can do in the consenus process'''
def __init__(self, me):
'''Initialisation some attributes'''
self.me = me # id of smart meter
self.users = 12 # number of smart meters in the network
# list_reputation = []
self.peers = 4 # number of peers (P% best nodes)
def get_list_from_bloc(self):
''' Get the reputation list from the last bloc in the blockchain '''
self.loop = asyncio.get_event_loop()
self.cli = Client(
net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', 'Admin')
self.cli.new_channel("firstchannel")
# first get the hash by calling 'query_info'
self.response = self.loop.run_until_complete(self.cli.query_info(
requestor=self.org1_admin,
channel_name='firstchannel',
peers=['peer0.org1.dz'],
decode=True
))
self.test_hash = self.response.currentBlockHash
self.response = self.loop.run_until_complete(self.cli.query_block_by_hash(
requestor=self.org1_admin,
channel_name='firstchannel',
peers=['peer0.org1.dz'],
block_hash=self.test_hash,
decode=True
))
self.List_rep_bloc_byte = \
self.response.get('data').get('data')[0].get('payload').get('data').get('actions')[0].get('payload').get(
'action').get(
'proposal_response_payload').get('extension').get('results').get('ns_rwset')[0].get('rwset').get(
'writes')[
0].get('value')
self.List_rep_bloc_str = self.List_rep_bloc_byte.decode("UTF-8") # convert byte to string
self.List_rep_bloc_dic = ast.literal_eval(self.List_rep_bloc_str) # convert dictionary string to dictionary
for self.k, self.v in self.List_rep_bloc_dic.items():
if self.k == 'Liste des reputations':
self.List_rep_bloc = ast.literal_eval(self.v) # convert list from str -> list
#str to int
#for self.i in range(0, len(self.List_rep_bloc)):
# self.List_rep_bloc[self.i] = int(self.List_rep_bloc[self.i])
return self.List_rep_bloc
def get_leader_and_p(self, reputation_list_bloc):
''' return the leader and the P% nodes based on the reputation list in the last bloc in the blockchain '''
self.list_reputation_slice = reputation_list_bloc[:]
self.leader_id = self.list_reputation_slice.index(
max(self.list_reputation_slice)) # 1er min id of node -leader- (men les P%) that has max reputation.
self.list_p = []
self.list_p.append(self.leader_id)
self.list_reputation_slice[self.leader_id] = 0
for i in range(0, self.peers - 1):
self.p_id = self.list_reputation_slice.index(max(
self.list_reputation_slice)) # p_1 i.e P%_1 - premier noeud du p% - (# 2eme min id of node (men les P%) that has max reputation.)
self.list_p.append(self.p_id) # list_p contient le id du leader et les id des P%.
self.list_reputation_slice[self.p_id] = 0
return self.list_p
def send_mesure_to_p(self, user, list_p):
'''Send data to all P% -normalment to all nodes-'''
self.loop = asyncio.get_event_loop()
self.cli = Client(
net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.my_data = str(random.randint(2, 22)) + "kw" # data consumed by the SM
# my_reputation = str(list_reputation[Me]) #reputation of this SM. On envoi pas la reputation.
for i in range(0, self.peers):
'''Send data consumed by this SM
To all the peers in the network (P%)
car c eux qui font la verification du bloc
'''
self.args = ['SM' + str(list_p[i]), str(self.me), str(self.my_data)]
# The response should be true if succeed
self.response = self.loop.run_until_complete(
self.cli.chaincode_invoke(
requestor=self.org1_admin,
channel_name='secondchannel',
peers=['peer' + str(i) + '.org1.dz'],
args=self.args,
fcn='NewData',
cc_name='test_cc2',
transient_map=None, # optional, for private data
wait_for_event=True,
)
)
def retrieve_merkle_data(self, user, list_p):
self.ret = ""
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.list_pp = list_p[:]
self.list_data_retrived = []
#del self.list_pp[0]
if 1 == 1:
# self.list_data_retrived = []
self.args = ['SM' + str(self.list_pp[0])]
self.lead_me = '0' # l'id du peer qui est relier avec le leader
for i in range(0, 2):
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_query(
requestor=self.org1_admin,
fcn="GetData",
channel_name='secondchannel',
peers=['peer' + self.lead_me + '.org1.dz'],
args=self.args,
cc_name='test_cc2'
))
self.response = json.loads(self.response)
self.list_data_retrived.append(self.response)
if self.me == self.list_pp[0] or self.me not in self.list_pp:
break
self.args = ['SM' + str(self.me)]
self.lead_me = str(self.list_pp.index(self.me)) # mon id in str to use it in cli.chaincode_query "peers"
#self.response = json.loads(self.response)
#
#self.list_data_retrived.append(self.response)
#
# print(self.list_data_retrived)
if self.me in self.list_pp and self.me != self.list_pp[0]:
if (self.list_data_retrived[0]['MerklerootDATA'] == self.list_data_retrived[1]['MerklerootDATA']):
self.ret = "true"
else:
self.ret = "false"
return (self.list_data_retrived[0]['Consommations'], self.list_data_retrived[0]['MerklerootDATA'], self.list_data_retrived[0]['Timestamp'], self.ret)
def send_vote_b1(self, user, list_p, result_comparaison):
''' every user from P% send votes about the validation of B1 (merkle root local comparer avec merkle root du leader)'''
self.list_pp = list_p[:]
del self.list_pp[0]
if self.me in self.list_pp:
if result_comparaison == "true":
self.vote = "accepter"
elif result_comparaison == "false":
self.vote = "rejeter"
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.args = ["B1_votes", str(self.me), self.vote]
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_invoke(
requestor=self.org1_admin,
fcn='Votes',
channel_name='secondchannel',
peers=['peer0.org1.dz'], # the peer of the leader
args=self.args,
cc_name='test_cc2',
transient_map=None,
wait_for_event=True,
))
def retrieve_vote_b1(self, user):
'''Every user retrieve the list of validation of B1 that contain the votes of P%, and if B1 is valid or not'''
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.args = ['B1_votes']
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_query(
requestor=self.org1_admin,
fcn='GetVotes',
channel_name='secondchannel',
peers=['peer0.org1.dz'],
args=self.args,
cc_name='test_cc2'
))
self.response = ast.literal_eval(self.response) # convert dictionary string to dictionary
return self.response["List Votes"] # return List
def maj_reputations(self, List, List_vote, leader):
'''mise a jour de la liste des reputations'''
self.validation_bloc = List_vote[-1]
self.List_copy = List[:]
if self.validation_bloc == 'valide':
self.List_copy [leader] = self.List_copy [leader] + 10
for self.i in range(0, len(List_vote)):
if List_vote[self.i] == 'accepter':
self.List_copy[self.i] = self.List_copy[self.i] + 10
elif List_vote[self.i] == 'rejeter':
self.List_copy[self.i] = self.List_copy[self.i] - 10
if self.validation_bloc == 'notvalide':
self.List_copy [leader] = self.List_copy [leader] - 10
for self.i in range(0, len(List_vote)):
if List_vote[self.i] == 'accepter':
self.List_copy[self.i] = self.List_copy[self.i] - 10
elif List_vote[self.i] == 'rejeter':
self.List_copy[self.i] = self.List_copy[self.i] + 10
for self.i in range(0, len(List)):
if self.List_copy[self.i] > 100:
self.List_copy[self.i] = 100
elif self.List_copy[self.i] < 0:
self.List_copy[self.i] = 0
return self.List_copy
def select_new_leader(self, p_leader, validation_b1, liste_vote_b1):
'''change leader only if the validation of bloc B1 (validation_b1) is = notvalid '''
self.new_leader = p_leader[0]
self.p_leader_new = p_leader[:]
self.boo = 1
if validation_b1 == 'notvalid':
while self.boo:
self.ancien_leader = self.p_leader_new.pop(0)
self.p_leader_new.append(self.ancien_leader)
self.new_leader = self.p_leader_new[0]
if list_vote_b1[self.new_leader] == 'rejeter':
self.boo = 0
return (self.p_leader_new, self.new_leader)
def calculate_merkle_reputations(self, p_leader_new, list_rep_updated):
'''Calculer le merkle root de la liste des reputations par chaque noeud des P%'''
self.liste_maj_rep = list_rep_updated[:]
self.mt = MerkleTools(hash_type="sha256")
for self.i in range(0, len(self.liste_maj_rep)):
self.liste_maj_rep[self.i] = str(self.liste_maj_rep[self.i])
self.mt.add_leaf(self.liste_maj_rep, True)
self.mt.make_tree()
self.is_ready = self.mt.is_ready
self.root_value = self.mt.get_merkle_root()
return self.root_value
def send_maj_reputations(self, user, p_leader, p_leader_new, liste_maj_rep_hash):
# mypeer is the peer of the user(node) from the updated list p_leader "p_leader_new".
'''send the new reputations list to the actual peer of the leader in order to make a merkle root for it'''
if self.me == p_leader_new[0]:
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.mypeer = p_leader.index(p_leader_new[0])
self.args = ["hash_reputations", liste_maj_rep_hash]
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_invoke(
requestor=self.org1_admin,
fcn='NewRep',
channel_name='secondchannel',
peers=['peer'+str(self.mypeer)+'.org1.dz'], # the peer of the leader
args=self.args,
cc_name='test_cc2',
transient_map=None,
wait_for_event=True,
))
def retrieve_merkle_reputations(self, user, p_leader, p_leader_new, local_hash_rep):
# l'id du peer qui est relier avec le leader
'''recuperer le merkle root de la liste de reputations a partir du peer du leader'''
self.result_comparaison2 = ""
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.list_pp = p_leader_new[:]
del self.list_pp[0]
if self.me in self.list_pp:
self.list_data_retrived = []
self.args = ["hash_reputations"]
self.peer_leader = p_leader.index(p_leader_new[0])
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_query(
requestor=self.org1_admin,
fcn='GetRep',
channel_name='secondchannel',
peers=['peer' + str(self.peer_leader) + '.org1.dz'],
args=self.args,
cc_name='test_cc2'
))
#self.lead_me = str(self.list_pp.index(self.me) + 1) # mon id in str to use it in cli.chaincode_query "peers"
self.response = json.loads(self.response)
#print(type(self.response))
#self.list_data_retrived.append(self.response)
#
# print(self.list_data_retrived)
if self.response['MerklerootReputations'] == local_hash_rep:
self.result_comparaison2 = "true"
else:
self.result_comparaison2 = "false"
return self.result_comparaison2
def send_vote_b2(self, user, list_p, result_comparaison):
''' every user from P% send votes about the validation of B2 (merkle root local comparer avec merkle root du leader)'''
self.list_pp = list_p[:]
del self.list_pp[0]
if self.me in self.list_pp:
if result_comparaison == "true":
self.vote = "accepter"
elif result_comparaison == "false":
self.vote = "rejeter"
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.args = ["B2_votes", str(self.me), self.vote]
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_invoke(
requestor=self.org1_admin,
fcn='Votes',
channel_name='secondchannel',
peers=['peer0.org1.dz'], # the peer of the leader "not necessarly"
args=self.args,
cc_name='test_cc2',
transient_map=None,
wait_for_event=True,
))
def retrieve_vote_b2(self, user):
'''Every user retrieve the list of validation of B2 that contain the votes of P%, and if B1 is valid or not'''
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('secondchannel')
self.args = ["B2_votes"]
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_query(
requestor=self.org1_admin,
fcn='GetVotes',
channel_name='secondchannel',
peers=['peer0.org1.dz'],
args=self.args,
cc_name='test_cc2',
))
self.response = ast.literal_eval(self.response) # convert dictionary string to dictionary
return self.response["List Votes"] # return List
def validation_b2(self,user, state_b2, state_b1, p_leader_new, time, data, mr_data, list_reputations, mr_reputations):
''' '''
self.value = ""
self.k = 0
if state_b2 == 'notvalide':
self.value = 'notvalide'
elif state_b2 == 'valide' and state_b1 == 'valide':
self.value = 'valide'
self.k = 1
elif state_b2 == 'valide' and state_b1 == 'notvalide':
self.value = 'valide'
self.k = 1
for self.i in range(0, len(data)):
data[self.i] = "0"
self.mt = MerkleTools(hash_type="sha256")
self.mt.add_leaf(data, True)
self.mt.make_tree()
mr_data = self.mt.get_merkle_root()
#print(self.value)
#print(p_leader_new[0])
if self.k == 1 and self.me == p_leader_new[0]:
#print(self.value)
#print(p_leader_new[0])
self.loop = asyncio.get_event_loop()
self.cli = Client(net_profile="/home/Adel/Desktop/PFE/Two_Chain_Network_Template/pfe-project/sdk/MyNetwork.json")
self.org1_admin = self.cli.get_user('org1.dz', user) # user = User1 or User2 ...
# Make the client know there is a channel in the network
self.cli.new_channel('firstchannel')
self.args = [str(time), str(data), str(mr_data), str(list_reputations), str(mr_reputations)]
# The response should be true if succeed
self.response = self.loop.run_until_complete(self.cli.chaincode_invoke(
requestor=self.org1_admin,
fcn='NewData',
channel_name='firstchannel',
peers=['peer0.org1.dz'],
args=self.args,
cc_name='first_chaincode',
transient_map=None,
wait_for_event=True,
))
#print(self.response)
#exit()
return self.value
