An edited message

Editing replaces the text of one of your own text messages. On a message of a conversation it is the message's own edit(text). The conversation lists the peer's messages too, so the message you edit must be yours — the menu offers Edit on your own message only (DirectThreadNotOwnMessageError) — and a text one (DirectThreadNotTextMessageError): the menu of a link, voice, photo or sticker message has no Edit. The menu also stops offering Edit 15 minutes after the send, after five edits, on a disappearing message and on one with bot commands (DirectThreadMessageNotEditableError, its reason names the rule); the message's data carries timestamp, edit_count, message_ephemeral_lifetime_ms and command_count for it.

The 451 app saves the edit with the GraphQL mutation IGDirectEditMessageMutation on graphql_www: the conversation, the message and the new text as body.sensitive_string_value, and the message's own client_context as offline_threading_id. The brick is DirectEditMessage({ threadId, itemId, body, offlineThreadingId? }) of @igpapi/mobile.

Instagram can refuse the edit — the app offers Edit only for a while after the send — and a GraphQL refusal arrives as a successful HTTP answer with errors in it. The edit reads the answer, so a refusal is the typed DirectEditMessageRejectedError, never a success; an accepted edit answers the mutation's direct_edit_message as Instagram sent it.

Edit in a message's menu.

edit(text): the composer carries the message's text.

The corrected text before saving.

The message shown with its edited text.