[Question] How to identify previous messages?

[Kariton]

How can I identify previous messages? I don't mean send prior the "the bot being online".

I see that a reaction results in this: ctx.message.raw_message.envelope.dataMessage.reaction

{
    "emoji": "\ud83d\udc4d",
    "targetAuthor": "REDACTED",
    "targetAuthorNumber": "REDACTED",
    "targetAuthorUuid": "REDACTED",
    "targetSentTimestamp": 1675109984233,
    "isRemove": false
}

but what is message "targetSentTimestamp": 1675109984233?

for contrast reply does make it more easily to identify the corresponding message: ctx.message.raw_message.envelope.dataMessage.quote

{
    "id": 1234567890,
    "author": "REDACTED",
    "authorNumber": "REDACTED",
    "authorUuid": "REDACTED",
    "text": "message that I replied to",
    "attachments": []
}

I hope this question makes sense.

p.s.: questions wouldn't require a issue if you enable GitHub discussions in the repository settings. ;)