I just upvoted a comment in a community hosted on my site, and in the nginx log I can see:
ip.address - - [19/Feb/2024:14:33:31 +0000] "POST /inbox HTTP/1.1" 200 0 "-" "Lemmy/0.19.3; +https://endlesstalk.org"
ip.address - - [19/Feb/2024:14:33:43 +0000] "POST /inbox HTTP/1.1" 200 0 "-" "Lemmy/0.19.3; +https://endlesstalk.org"
Dumping out the activity, I can see:
... (single vote from account on another instance) ...
{
"@context": [
"https://join-lemmy.org/context.json",
"https://www.w3.org/ns/activitystreams"
],
"id": "https://endlesstalk.org/activities/like/f102d062-dfe9-4ece-96e8-310a09b249ba",
"actor": "https://endlesstalk.org/u/freamon",
"object": "https://sh.itjust.works/comment/9061222",
"type": "Like",
"audience": "https://lemmon.website/c/tails"
}
... (single vote from account on another instance) ...
{
"@context": [
"https://join-lemmy.org/context.json",
"https://www.w3.org/ns/activitystreams"
],
"id": "https://endlesstalk.org/activities/like/f102d062-dfe9-4ece-96e8-310a09b249ba",
"actor": "https://endlesstalk.org/u/freamon",
"object": "https://sh.itjust.works/comment/9061222",
"type": "Like",
"audience": "https://lemmon.website/c/tails"
}
... (single vote from account on another instance) ...
It's the same for comments too (if I grep the dump for other people's comments, there's only one, but there's two for comments made by me)
EDIT: can also see dupes from lemmy.ca (they actually sent the same Like 3 times).