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receipt-ledger: tariff version 6 prices an endpoint and a third party's usage, and bills an upscale and a tone mapping by what re-derives them #579

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dcharlot wants to merge 1 commit from wai/tariff-v6 into main
pull from: wai/tariff-v6
merge into: Transaction-Science:main
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2026-11-02

Transaction Science
receipt-ledger: tariff version 6 prices an endpoint and a third party's usage, and bills an upscale and a tone mapping by what re-derives them
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Two providers of one capability have different list prices, and one price
per capability overprices one or underprices the other. A job price now names
an endpoint, or none for every endpoint. A price of any endpoint beside a
price of one is refused: it would bill one job at both.

A third party's hop is billed by what its record states the provider bills
(route-record §6.2), in a new unit, `usage`, at the price of its endpoint and
its unit. Only the billed hop's record reaches a line: what a provider billed
for a failed hop is what the router's operator owes, and no line reads it. A
record's `charge` reaches no line either, since a line adds jobs and a
provider's figure is in its own terms; the line cites the record, which
states it signed. The proposal to put it on the line is dropped.

An upscale and a tone mapping get their own output forms. Each record is
proved by its own extension's verifier from what it read, and what the hop
delivered is held to what that proves, so the subpixels billed are what the
derivation gives. Their records are evidence, as an output receipt is, and a
new hop's run may cite them again.

These three moves share one version, so a buyer signs one new tariff and not
two. The tariff of versions 1 to 5 reads and bills as before.

The corpus's `invoice_version` control used version 6 as unknown, and now
uses 7. The fixtures are small enough that the corpus's debug test takes as
long as it did without them, about 11.5 minutes on the Framework, and the
README's commands use a release build, which regenerates it in about a minute.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
4c4fc6e277
2026-11-02 11:04:56 -05:00