Elamur Groupantsmova-serve-quota
The groupant beside tools/mova-serve/src/quota.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.
Facts
Implementation material. A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.
Components
| component | label | where |
|---|---|---|
| Approximant | partial | Approximant |
| Ast | partial | syntax.json |
| Cost | symbolic source derived | Cost |
| Descriptant | present | Descriptant |
| Invariant | partial | Invariant |
| Tests | executed bounded checks | Tests |
Obernants
The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.
| relation | type | label | where |
|---|---|---|---|
| Behavior complement | behavior complement | partial source derived model | Behavior complement |
| Reverse reconstruction | reverse reconstruction | partial source derived model | Reverse reconstruction |
| Model presence | model presence | partial source derived model | Model presence |
Model text
Descriptant
Word quotas: anonymous 5 000 words a request and 250 000 a day per IP; accounts by tier (free: 20 000 and 1 000 000; more tiers from a plans file); day counts kept two days on disk.
Approximant
check(who, w) = w ≤ per_request ∧ used(who, day) + w ≤ per_day; charge adds w.
Invariant
Counts never decrease within a UTC day; files older than yesterday are removed at the change of day; an unknown tier falls back to free.
Cost
O(log n) a call; a flush writes the day's map.
Behavior complement
No billing, no carry-over between days.
Reverse reconstruction
The day's file recovers each client's words that day.
Model presence
Plans: the anonymous plan is fixed; tiers come from the plans file.
Tests
quota::tests: plan limits, the daily refusal, another client and the next day unaffected, counts surviving a
restart, old days removed, word counting; plan_tests: tiers from the file and a malformed tier refused.
Provenance
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/tools/mova-serve/src/quota.rs.groupant/