What-If Engine

Non-destructive re-simulation of transactions.

The What-If Engine allows developers to test hypotheses by modifying the inputs of a failed transaction.

Input Patches

It supports patching four main categories:

1. Function Arguments: Modify the values passed to the contract.
2. Auth Context: Add or remove authorizations.
3. Ledger State: Change existing ledger entries before execution.
4. Resource Limits: Increase CPU/Memory/Footprint limits.

Comparison Tracing

The engine runs both the original and the modified execution, producing a side-by-side trace that highlights the exact moment the results diverge.