Ethereum: Converting a JSON Containing a SafeOperation into an EthSafeOperation Object

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As you’re already familiar with the Safe SDK, let’s dive into how we can convert a JSON containing a SafeOperation object into an equivalent EthSafeOperation object for Ethereum.

Step 1: Parse the JSON

First, we need to parse the JSON that contains the SafeOperation. This will give us a data structure in Python or JavaScript that represents our SafeOperation.

import json

from safe_sdk import SafeOpError







Load the JSON data from the mobile client's request

mobile_client_data = json.loads(mobile_client_request)



Parse the JSON into an object

safe_operation = SafeOp.from_json(mobile_client_data)

Step 2: Verify the Operation Type

Before creating EthSafeOperation objects, we need to ensure that our operation is valid. We can check the operation type by verifying if it’s a SafeOperation.

Check if the operation is a SafeOperation

if isinstance(safe_operation, SafeOp):

    
If it's valid, proceed with converting it

else:

    raise SafeOpError("Invalid operation")

Step 3: Convert the JSON to an EthSafeOperation

Now that we’ve verified the operation type, we can convert the SafeOperation object into an equivalent EthSafeOperation. We use the EthSafeOperation.from_safe_operation() method provided by the Safe SDK.

Create a new EthSafeOperation from the SafeOperation object

eth_safe_operation = EthSafeOperation.from_safe_operation(safe_operation)

Sample Code

Let’s put it all together into an example function that can handle various JSON inputs:

import json

from safe_sdk import SafeOpError , SafeOp


def convert_safe_operation(json_data):

    """

    Convert JSON containing to SafeOperation object into an equivalent EthSafeOperation object.


    Args:

        json_data (dict): A dictionary representing the JSON data from the mobile client's request.


    Return:

        EthSafeOperation: An EthSafeOperation object representing the converted operation.

    """

    safe_operation = SafeOp.from_json(json_data)

    

    
Check if the operation is a SafeOperation

    if isinstance(safe_operation, SafeOp):

        
If it's valid, proceed with converting it

        eth_safe_operation = EthSafeOperation.from_safe_operation(safe_operation)

        

        return eth_safe_operation

    else:

        raise SafeOpError("Invalid operation")

Usage

Here’s an example usage of the convert_safe_operation() function:

mobile_customer_data = {

    "type": "safeOperation",

    "value": {"id": 123, "data": "sample data"}

}


eth_safe_operation = convert_safe_operation(mobile_client_data)


print(eth_safe_operation.to_json())

This will output the JSON representation of the converted EthSafeOperation object.

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