Tap → unlock took ~3 s on sintra. The card server's /session now fills
fiat only from its warm rate cache (aiolabs/boltcards
fix/session-fiat-from-cache); when it returns a currency with fiat null,
the store prices the balance in that currency from the ATM's own rate
source after the unlock, so the chip still shows the wallet's currency.
Log how long the session call took and whether the server priced it, so
the next latency question can be answered from the journal.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
docs/boltcard-session.md is the /session wire contract (sibling of
boltcard-receive-resolver.md), including the trust boundary: the session
URL is derived from the card's own host, so open enrollment is still not
a security boundary (#91). ADR-003's amendment now records verified entry
via /session and the hidden-by-default balance display.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
