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step4.py
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step4.py
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# Here, we are building the transaction payload that we'll send to write the Trust Anchor identity to the ledger.
# We submit this transaction under the authority of the steward DID that the ledger already recognizes.
# This call will look up the private key of the steward DID in our wallet, and use it to sign the transaction.
print_log('\n7. 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))
# Now that we have the transaction ready, send it. The building and the sending are separate steps because some
# clients may want to prepare transactions in one piece of code (e.g., that has access to privileged backend systems),
# and communicate with the ledger in a different piece of code (e.g., that lives outside the safe internal
# network).
print_log('\n8. Sending NYM request to the ledger\n')
nym_transaction_response = await ledger.sign_and_submit_request(pool_handle=pool_handle,
wallet_handle=wallet_handle,
submitter_did=steward_did,
request_json=nym_transaction_request)
print_log('NYM transaction response: ')
pprint.pprint(json.loads(nym_transaction_response))
# At this point, we have successfully written a new identity to the ledger. Our next step will be to query it.