Tier 3: Time-Travel

Interactive debugging and non-destructive simulation.

Tier 3 is the ultimate investigation path, turning Prism into a full interactive debugger for the Stellar network.

Interactive Debugging

Set breakpoints on:

• Function Entry/Exit: Stop when a specific contract function is called.
• Storage Access: Break when a specific ledger key is read or written.
• Budget Thresholds: Trigger a break when CPU or memory usage exceeds a limit.

Once a breakpoint is hit, you can step through execution one host call at a time.

What-If Mode

The What-If engine lets you modify inputs and re-simulate:

• Modified Arguments: “Would it have worked if I passed 10 instead of 5?”
• State Patching: “What if the balance was already 100 XLM?”
• Resource Limits: “How much budget would I need for this to succeed?”

Prism runs both the original and modified execution and shows you a side-by-side diff of where they diverge.