Ethereum: Converting a JSON containing a SafeOperation into an EthSafeOperation object

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Since you are 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 containing 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 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: Check the operation type

Before creating EthSafeOperation objects, we need to make sure that our operation is valid. We can check the operation type by checking if it is a SafeOperation.

Check if the operation is a SafeOperation
if isinstance(safe_operation, SafeOp):

If it is valid, proceed with the conversion
else:
raise SafeOpError("Invalid operation")

Step 3: Convert the JSON to an EthSafeOperation

Now that we have verified the operation type, we can convert the SafeOperation object to 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)

Example code

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

import json
from safe_sdk import SafeOpError, SafeOp
def convert_safe_operation(json_data):
"""
Convert a JSON containing a SafeOperation object into an equivalent EthSafeOperation object.
Arguments:
json_data (dict): A dictionary representing the JSON data from the mobile client request.
Returns:
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 valid, proceed with the conversion
eth_safe_operation = EthSafeOperation.from_safe_operation(safe_operation)
return eth_safe_operation
else:
raise SafeOpError("Invalid operation")

Usage

Here is an example usage of the convert_safe_operation() function:

mobile_client_data = {
"type": "safeOperation",
"value": {"id": 123, "data": "example 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.