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step2.py
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step2.py
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# 1.
print_log('\n1. opening a new local pool ledger configuration that will be used '
'later when connecting to ledger.\n')
pool_config = json.dumps({'genesis_txn': str(genesis_file_path)})
try:
await pool.create_pool_ledger_config(config_name=pool_name, config=pool_config)
except IndyError as ex:
if ex.error_code == ErrorCode.PoolLedgerConfigAlreadyExistsError:
pass
# 2.
print_log('\n2. Open pool ledger and get the handle from libindy\n')
pool_handle = await pool.open_pool_ledger(config_name=pool_name, config=None)
# 3.
print_log('\n3. Creating Issuer wallet and opening it to get the handle.\n')
issuer_wallet_handle = await open_wallet(issuer_wallet_config, issuer_wallet_credentials)
# 4.
print_log('\n4. Generating and storing steward DID and verkey\n')
steward_seed = '000000000000000000000000Steward1'
did_json = json.dumps({'seed': steward_seed})
steward_did, steward_verkey = await did.create_and_store_my_did(issuer_wallet_handle, did_json)
print_log('Steward DID: ', steward_did)
print_log('Steward Verkey: ', steward_verkey)
# 5.
print_log('\n5. Generating and storing trust anchor DID and verkey\n')
trust_anchor_did, trust_anchor_verkey = await did.create_and_store_my_did(issuer_wallet_handle, "{}")
print_log('Trust anchor DID: ', trust_anchor_did)
print_log('Trust anchor Verkey: ', trust_anchor_verkey)
# 6.
print_log('\n6. Building NYM request to add Trust Anchor to the ledger\n')
nym_transaction_request = await ledger.build_nym_request(submitter_did=steward_did,
target_did=trust_anchor_did,
ver_key=trust_anchor_verkey,
alias=None,
role='TRUST_ANCHOR')
print_log('NYM transaction request: ')
pprint.pprint(json.loads(nym_transaction_request))
# 7.
print_log('\n7. Sending NYM request to the ledger\n')
nym_transaction_response = await ledger.sign_and_submit_request(pool_handle=pool_handle,
wallet_handle=issuer_wallet_handle,
submitter_did=steward_did,
request_json=nym_transaction_request)
print_log('NYM transaction response: ')
pprint.pprint(json.loads(nym_transaction_response))
# 8.
print_log('\n8. Issuer create Credential Schema\n')
schema = {
'name': 'gvt',
'version': '1.0',
'attributes': '["age", "sex", "height", "name"]'
}
issuer_schema_id, issuer_schema_json = await anoncreds.issuer_create_schema(steward_did,
schema['name'],
schema['version'],
schema['attributes'])
print_log('Schema: ')
pprint.pprint(issuer_schema_json)
# 9.
print_log('\n9. Build the SCHEMA request to add new schema to the ledger\n')
schema_request = await ledger.build_schema_request(steward_did, issuer_schema_json)
print_log('Schema request: ')
pprint.pprint(json.loads(schema_request))
# 10.
print_log('\n10. Sending the SCHEMA request to the ledger\n')
schema_response = \
await ledger.sign_and_submit_request(pool_handle,
issuer_wallet_handle,
steward_did,
schema_request)
print_log('Schema response:')
pprint.pprint(json.loads(schema_response))
# 11.
print_log('\n11. Creating and storing Credential Definition using anoncreds as Trust Anchor, for the given Schema\n')
cred_def_tag = 'TAG1'
cred_def_type = 'CL'
cred_def_config = json.dumps({"support_revocation": False})
(cred_def_id, cred_def_json) = \
await anoncreds.issuer_create_and_store_credential_def(issuer_wallet_handle,
trust_anchor_did,
issuer_schema_json,
cred_def_tag,
cred_def_type,
cred_def_config)
print_log('Credential definition: ')
pprint.pprint(json.loads(cred_def_json))
# 12.
print_log('\n12. Creating Prover wallet and opening it to get the handle.\n')
prover_did = 'VsKV7grR1BUE29mG2Fm2kX'
prover_wallet_config = json.dumps({"id": "prover_wallet"})
prover_wallet_credentials = json.dumps({"key": "prover_wallet_key"})
prover_wallet_handle = await open_wallet(prover_wallet_config, prover_wallet_credentials)
# 13.
print_log('\n13. Prover is creating Link Secret\n')
prover_link_secret_name = 'link_secret'
link_secret_id = await anoncreds.prover_create_master_secret(prover_wallet_handle,
prover_link_secret_name)
# 14.
print_log('\n14. Issuer (Trust Anchor) is creating a Credential Offer for Prover\n')
cred_offer_json = await anoncreds.issuer_create_credential_offer(issuer_wallet_handle,
cred_def_id)
print_log('Credential Offer: ')
pprint.pprint(json.loads(cred_offer_json))
# 15.
print_log('\n15. Prover creates Credential Request for the given credential offer\n')
(cred_req_json, cred_req_metadata_json) = \
await anoncreds.prover_create_credential_req(prover_wallet_handle,
prover_did,
cred_offer_json,
cred_def_json,
prover_link_secret_name)
print_log('Credential Request: ')
pprint.pprint(json.loads(cred_req_json))
# 16.
print_log('\n16. Issuer (Trust Anchor) creates Credential for Credential Request\n')
cred_values_json = json.dumps({
"sex": {"raw": "male", "encoded": "5944657099558967239210949258394887428692050081607692519917050011144233"},
"name": {"raw": "Alex", "encoded": "1139481716457488690172217916278103335"},
"height": {"raw": "175", "encoded": "175"},
"age": {"raw": "28", "encoded": "28"}
})
(cred_json, _, _) = \
await anoncreds.issuer_create_credential(issuer_wallet_handle,
cred_offer_json,
cred_req_json,
cred_values_json, None, None)
print_log('Credential: ')
pprint.pprint(json.loads(cred_json))
# 17.
print_log('\n17. Prover processes and stores received Credential\n')
await anoncreds.prover_store_credential(prover_wallet_handle, None,
cred_req_metadata_json,
cred_json,
cred_def_json, None)