nx_ad_bill.nx

nx_ad_bill.nx -- LIB: the billing FSM for the "Brought to you by" performance ad engine (ADS-008, CALLOUT-004). NO-WAVE applied to revenue: a charge exists ONLY as a function of a real meter verdict + real, store-resident prices. DEFAULT STATE = NO CHARGE. Reads prices from the SOVEREIGN STORE (adpricing:, ADS-006), never TSV. THE BILL (reads ONLY the meter verdict -- nx_ad_meter ADS-007): UNMEASURABLE -> REFUSED (no GREEN meter verdict: cannot bill what we cannot measure) UNDER -> $0 (we did not perform -- the default) PERFORM -> perform_fee EXCEED -> perform_fee + exceed_bonus (flat fee + ONE flat capped bonus) HARD CEILING: the most a campaign can ever be billed in a period = perform_fee + exceed_bonus (budgetable, never a runaway invoice -- "relationship over a quick buck"). TAMPER/HONESTY: any PENDING price (perform_fee/exceed_bonus = -1, sponsor co-spec ADS-005 not yet set) -> REFUSED. Fail-closed on an unknown verdict. license_tier: ORIGINAL