Reversals
Undoing transactions: clean undos, refunds and take-backs, your reversal policy options, and the guards on every reversal
Reversal Levels
Exact reversals, refunds, and claw-backs — derived from the ledger, never chosen by the caller — plus the discretionary debits behind penalties and adjustments
Caps & Idempotency
The three guards on every reversal: the amount cap, reversal_code, and the no-reversal-of-reversals rule — and the codes that guard bonuses and penalties