Harden MIME boundaries, topup atomicity, and nonce cleanup#8
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- Use crypto.randomUUID() for MIME boundaries instead of predictable Date.now() to prevent boundary injection attacks - Fix topup race condition: use atomic SQL UPDATE with GREATEST() so concurrent topups both correctly extend from the latest expiresAt - Add probabilistic SiwxNonce cleanup (~1% of writes) to prevent unbounded table growth — deletes entries older than 24h Co-Authored-By: Claude Opus 4.6 <[email protected]>
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Subdomain owners can buy the matching inbox name with the same wallet. Co-Authored-By: Claude Opus 4.6 <[email protected]>
- Log nonce cleanup errors instead of silently swallowing them - Guard against empty UPDATE result if inbox is deleted between findUnique and atomic update Co-Authored-By: Claude Opus 4.6 <[email protected]>
Agents probing the endpoint now learn that subdomain owners can buy the matching inbox name with the same wallet. Co-Authored-By: Claude Opus 4.6 <[email protected]>
- forwardTo is now optional on buy and nullable on update - When forwardTo is omitted, retainMessages is enabled automatically so the inbox works as a programmatic mailbox via the messages API - Forward handler skips forwarding for inboxes without forwardTo - Cron reminder skips inboxes without a forwarding address - S3 cleanup no longer requires forwarding to have happened - Updated discovery description, llms.txt, and CLAUDE.md Co-Authored-By: Claude Opus 4.6 <[email protected]>
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Summary
Date.now()withcrypto.randomUUID()for MIME boundary generation inses.tsUPDATE ... SET "expiresAt" = GREATEST("expiresAt", NOW()) + intervalso concurrent topups both correctly extendTest plan
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