planetmint/integration/python/src/test_zenroom.py

import json
import base58
from hashlib import sha3_256
from cryptoconditions.types.zenroom import ZenroomSha256
from planetmint_driver.crypto import generate_keypair
from .helper.hosts import Hosts
from zenroom import zencode_exec
import time


def test_zenroom_signing(
    gen_key_zencode,
    secret_key_to_private_key_zencode,
    fulfill_script_zencode,
    zenroom_data,
    zenroom_house_assets,
    condition_script_zencode,
):

    biolabs = generate_keypair()
    version = "2.0"

    alice = json.loads(zencode_exec(gen_key_zencode).output)["keyring"]
    bob = json.loads(zencode_exec(gen_key_zencode).output)["keyring"]

    zen_public_keys = json.loads(
        zencode_exec(
            secret_key_to_private_key_zencode.format("Alice"),
            keys=json.dumps({"keyring": alice}),
        ).output
    )
    zen_public_keys.update(
        json.loads(
            zencode_exec(
                secret_key_to_private_key_zencode.format("Bob"),
                keys=json.dumps({"keyring": bob}),
            ).output
        )
    )

    zenroomscpt = ZenroomSha256(
        script=fulfill_script_zencode, data=zenroom_data, keys=zen_public_keys
    )
    print(f"zenroom is: {zenroomscpt.script}")

    # CRYPTO-CONDITIONS: generate the condition uri
    condition_uri_zen = zenroomscpt.condition.serialize_uri()
    print(f"\nzenroom condition URI: {condition_uri_zen}")

    # CRYPTO-CONDITIONS: construct an unsigned fulfillment dictionary
    unsigned_fulfillment_dict_zen = {
        "type": zenroomscpt.TYPE_NAME,
        "public_key": base58.b58encode(biolabs.public_key).decode(),
    }
    output = {
        "amount": "10",
        "condition": {
            "details": unsigned_fulfillment_dict_zen,
            "uri": condition_uri_zen,
        },
        "public_keys": [
            biolabs.public_key,
        ],
    }
    input_ = {
        "fulfillment": None,
        "fulfills": None,
        "owners_before": [
            biolabs.public_key,
        ],
    }
    metadata = {"result": {"output": ["ok"]}}
    token_creation_tx = {
        "operation": "CREATE",
        "asset": zenroom_house_assets,
        "metadata": metadata,
        "outputs": [
            output,
        ],
        "inputs": [
            input_,
        ],
        "version": version,
        "id": None,
    }

    # JSON: serialize the transaction-without-id to a json formatted string
    message = json.dumps(
        token_creation_tx,
        sort_keys=True,
        separators=(",", ":"),
        ensure_ascii=False,
    )

    # major workflow:
    # we store the fulfill script in the transaction/message (zenroom-sha)
    # the condition script is used to fulfill the transaction and create the signature
    #
    # the server should ick the fulfill script and recreate the zenroom-sha and verify the signature

    message = zenroomscpt.sign(message, condition_script_zencode, alice)
    assert zenroomscpt.validate(message=message)

    message = json.loads(message)
    fulfillment_uri_zen = zenroomscpt.serialize_uri()

    message["inputs"][0]["fulfillment"] = fulfillment_uri_zen
    tx = message
    tx["id"] = None
    json_str_tx = json.dumps(tx, sort_keys=True, skipkeys=False, separators=(",", ":"))
    # SHA3: hash the serialized id-less transaction to generate the id
    shared_creation_txid = sha3_256(json_str_tx.encode()).hexdigest()
    message["id"] = shared_creation_txid

    hosts = Hosts("/shared/hostnames")
    pm_alpha = hosts.get_connection()

    sent_transfer_tx = pm_alpha.transactions.send_commit(message)
    time.sleep(1)

    # Assert that transaction is stored on both planetmint nodes
    hosts.assert_transaction(shared_creation_txid)
    print(f"\n\nstatus and result : + {sent_transfer_tx}")