WhatsApp DMs can arrive with LID sender IDs even when
WHATSAPP_ALLOWED_USERS is configured with phone numbers. The allowlist
check now reads bridge session mapping files (lid-mapping-*.json) to
resolve phone↔LID aliases, matching users regardless of which
identifier format the message uses.
Both the Python gateway (_is_user_authorized) and the Node bridge
(allowlist.js) now share the same mapping-file-based resolution logic.
Co-authored-by: Frederico Ribeiro <fr@tecompanytea.com>
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