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Claude a51387902c Rework PoE2 module: pairwise currency exchange rates, 1h/24h/7d change
PoE2's economy is inherently pairwise (Exalted vs Chaos, Divine vs
Exalted), not everything quoted in one reference currency, so the
watchlist now tracks admin-picked currency pairs and shows both
directions with 1h/24h/7d change. poe.ninja doesn't expose per-pair
rates or multiple change windows, so both are self-computed: any
pair's rate comes from dividing the two currencies' primaryValue
(same reference currency cancels out), and change% is derived from
our own poll-history snapshots rather than poe.ninja's fixed 7-day
sparkline. The inverse direction's change is exact closed-form math
from the forward change, not a sign-flip approximation.

The old single-currency watchlist schema can't be mapped onto pairs,
so migrate() drops and rebuilds poe2_watchlist when it detects the
old shape.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014c1L8ghNBFjfiH64UMViP8
2026-07-25 02:48:28 +00:00
..
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