FA-75975 / Chat ordering and read receipts / Member archive

Filter read receipts by privacy settings and chat kind: direct reciprocity · case 05

A viewer who disabled their own receipts can still see other people's receipts in direct chats.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

settings[u] is a user's "send read receipts" flag (default True). In direct chats a reader is shown only when both the reader and the viewer have receipts enabled (reciprocity). In group chats only the reader's flag matters. In channels only admins see receipts and they see every reader regardless of settings. The viewer never sees their own receipt. Result: sorted visible readers.

Why this case matters

Receipt privacy rules differ by conversation type; mistakes leak receipts users disabled or hide ones they may see.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
viewer disabled in direct chat	`["r"]`	`[]`	Failed

MEMBER ARCHIVE

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