📄️ Simulate by Hash
Re-simulates an existing transaction by hash using Walnut's built-in RPC for the given chain.
📄️ Simulate by Calldata
Simulates a Starknet transaction from raw felt calldata, human-readable decoded calls, or an existing transaction hash fetched via a custom RPC. The request body is an externally tagged union: the variant name (`WithCalldata`, `WithDecodedCalldata`, or `WithTxHash`) is the outer JSON key.