cosign_transaction.py

from typing import Any

import requests
from multiversx_sdk import TransactionsConverter

from multiversx_sdk_cli.errors import GuardianServiceError
from multiversx_sdk_cli.interfaces import ITransaction


def cosign_transaction(transaction: ITransaction, service_url: str, guardian_code: str) -> ITransaction:
    tx_converter = TransactionsConverter()
    payload = {
        "code": f"{guardian_code}",
        "transactions": [tx_converter.transaction_to_dictionary(transaction)]
    }

    # we call sign-multiple-transactions to be allowed a bigger payload (e.g. deploying large contracts)
    url = f"{service_url}/sign-multiple-transactions"
    response = requests.post(url, json=payload)
    check_for_guardian_error(response.json())

    # we only send 1 transaction
    tx_as_dict = response.json()["data"]["transactions"][0]
    transaction.guardian_signature = bytes.fromhex(tx_as_dict["guardianSignature"])

    return transaction


def check_for_guardian_error(response: dict[str, Any]):
    error = response["error"]

    if error:
        raise GuardianServiceError(error)