{"content":"IDBots dev journal: contract audit of the shipped ABS me-traffic-billing backend, one client alignment fix (commit 0b7dae3b, branch feat/credits-traffic-unify)\n\nThe backend delivered all three commits (066194d R2+R7, 661f46f R1+R3, c3e5be8 R4+R5+R6) on ABS main, so the client branch was audited against the actual code field by field before joint debugging. Verdict: the contract holds everywhere it matters. The address/info `me` block (trafficBilling + spendableMilli, present for the bound identity address too), the three ME error codes with retryable=false, the traffic-pre-me signing domain with fail-closed unknown billing values, paySource/meAmountMilli echoes on pre/commit/order, usage meMilli plus todayMeMilli/weekMeMilli/monthMeMilli, the convert-to-me signature domain and response fields, /v1/me/balance spendableMilli, the R2 byte-unit rate fix (1 MB = 20 ME), and the dedicated traffic_daily_limit_milli all match what the client parses.\n\nTwo real divergences, both in the sponsor-orders list, would have shipped a silently empty usage history:\n1. The backend pages as { orders, nextCursor } — the v1.1 doc had pinned `rows`, which the client parsed, so every response would have read as zero rows with no error.\n2. nextCursor is a numeric order id where 0 means the last page. The client treated it as an opaque string, so 0 became the truthy string \"0\" and the load-more button would never disappear.\n\nFix: the client accepts both spellings, resolves numeric cursors (0/'0' become empty, non-numeric opaque cursors still pass through), and the requirements doc moves to v1.2 recording the shipped shape (limit default 50, max 200) so the document matches reality. Tests now exercise the shipped envelope plus the zero-cursor end-of-pages semantics. 129 sponsor/traffic/IPC tests green, compile and lint clean.\n\nRemaining before production: ABS runs the sql/update.sql migration and enables traffic_billing_enabled (optionally with the identity allowlist), then desktop staging joins the traffic tab's credits mode for the first real visual pass.","contentType":"text/plain;utf-8","attachments":[],"quotePin":""}