def handle_credentials(self, state, message):
global admin_url
credential_exchange_id = message["credential_exchange_id"]
s_print(
"Credential: state=",
state,
", credential_exchange_id=",
credential_exchange_id,
)
if state == "request_received":
print("#17 Issue credential to X")
cred_attrs = {
"name": "Alice Smith",
"date": "2018-05-28",
"degree": "Maths",
"age": "24",
}
resp = requests.post(
admin_url + "/credential_exchange/" + credential_exchange_id +
"/issue",
json={"credential_values": cred_attrs},
)
assert resp.status_code == 200
return ""
return ""
def handle_presentations(self, state, message):
global admin_url
presentation_exchange_id = message["presentation_exchange_id"]
s_print(
"Presentation: state=",
state,
", presentation_exchange_id=",
presentation_exchange_id,
)
if state == "presentation_received":
print("#27 Process the proof provided by X")
print("#28 Check if proof is valid")
resp = requests.post(admin_url + "/presentation_exchange/" +
presentation_exchange_id +
"/verify_presentation")
assert resp.status_code == 200
proof = json.loads(resp.text)
s_print("Proof =", proof["verified"])
return ""
return ""
def handle_credentials(self, state, message):
global admin_url
credential_exchange_id = message["credential_exchange_id"]
s_print(
"Credential: state=",
state,
", credential_exchange_id=",
credential_exchange_id,
)
if state == "offer_received":
print(
"#15 After receiving credential offer, send credential request"
)
resp = requests.post(admin_url + "/credential_exchange/" +
credential_exchange_id + "/send-request")
assert resp.status_code == 200
return ""
elif state == "stored":
print("Stored credential in wallet")
resp = requests.get(admin_url + "/credential/" +
message["credential_id"])
assert resp.status_code == 200
print("Stored credential:")
print(resp.text)
print("credential_id", message["credential_id"])
print("credential_definition_id",
message["credential_definition_id"])
print("schema_id", message["schema_id"])
print("credential_request_metadata",
message["credential_request_metadata"])
return ""
return ""
def handle_presentations(self, state, message):
global admin_url
presentation_exchange_id = message["presentation_exchange_id"]
presentation_request = message["presentation_request"]
s_print(
"Presentation: state=",
state,
", presentation_exchange_id=",
presentation_exchange_id,
)
if state == "request_received":
print(
"#24 Query for credentials in the wallet that satisfy the proof request"
)
# include self-attested attributes (not included in credentials)
revealed = {}
self_attested = {}
predicates = {}
for referent in presentation_request["requested_attributes"]:
# select credentials to provide for the proof
creds = requests.get(admin_url + "/presentation_exchange/" +
presentation_exchange_id +
"/credentials/" + referent)
assert creds.status_code == 200
credentials = json.loads(creds.text)
if credentials:
revealed[referent] = {
"cred_id": credentials[0]["cred_info"]["referent"],
"revealed": True,
}
else:
self_attested[referent] = "my self-attested value"
for referent in presentation_request["requested_predicates"]:
# select credentials to provide for the proof
creds = requests.get(admin_url + "/presentation_exchange/" +
presentation_exchange_id +
"/credentials/" + referent)
assert creds.status_code == 200
credentials = json.loads(creds.text)
if credentials:
predicates[referent] = {
"cred_id": credentials[0]["cred_info"]["referent"],
"revealed": True,
}
print("#25 Generate the proof")
proof = {
"name": presentation_request["name"],
"version": presentation_request["version"],
"requested_predicates": predicates,
"requested_attributes": revealed,
"self_attested_attributes": self_attested,
}
print("#26 Send the proof to X")
resp = requests.post(
admin_url + "/presentation_exchange/" +
presentation_exchange_id + "/send_presentation",
json=proof,
)
assert resp.status_code == 200
return ""
return ""