def run_node():
cliNodeReg = OrderedDict([
('AlphaC', ('127.0.0.1', 8002)),
('BetaC', ('127.0.0.1', 8004)),
('GammaC', ('127.0.0.1', 8006)),
('DeltaC', ('127.0.0.1', 8008))])
with Looper(debug=False) as looper:
# Nodes persist keys when bootstrapping to other nodes and reconnecting
# using an ephemeral temporary directory when proving a concept is a
# nice way to keep things clean.
with TemporaryDirectory() as tmpdir:
clientId = 'Joe'
# this seed is used by the signer to deterministically generate
# a signature verification key that is shared out of band with the
# consensus pool
seed = b'a 32 byte super secret seed.....'
assert len(seed) == 32
signer = SimpleSigner(clientId, seed)
assert signer.verkey == b'cffbb88a142be2f62d1b408818e21a2f' \
b'887c4442ae035a260d4cc2ec28ae24d6'
client_address = ('127.0.0.1', 8000)
client = Client(clientId,
cliNodeReg,
ha=client_address,
signer=signer,
basedirpath=tmpdir)
looper.add(client)
# give the client time to connect
looper.runFor(3)
# a simple message
msg = {'life_answer': 42}
# submit the request to the pool
request, = client.submit(msg)
# allow time for the request to be executed
looper.runFor(3)
reply, status = client.getReply(request.reqId)
print('')
print('Reply: {}\n'.format(reply))
print('Status: {}\n'.format(status))
msg = {'life_answer': 42}
"""
And submit it to the pool.
"""
request, = client.submit(msg)
"""
Allow some time for the request to be executed.
"""
looper.runFor(3)
"""
Let's get the reply.
"""
reply, status = client.getReply(request.reqId)
"""
Check the reply and see if consensus has been reached.
"""
print("Reply: {}\n".format(reply))
print("Status: {}\n".format(status))
"""
See the reply details of a request.
"""
client.showReplyDetails(request.reqId)
"""
As we are using 4 nodes, we have an f-value of 1, which means that
consensus can be still achieved with one faulty node. In this example,
