One problem with ActivityPub is that there is not a standard format for errors returned from the API or federation protocol.
I wrote a Fediverse Enhancement Proposal (FEP) to establish a standard set of error messages using RFC 9457, Problem Details for HTTP APIs.
It'd be great to get some review here:
https://codeberg.org/fediverse/fep/src/branch/main/fep/c180/fep-c180.md
Comments and suggestions here (or just reply):
https://codeberg.org/evanp/fep/issues
..
Evan Prodromou /
npub150…az9xu
2025-03-24 17:59:49
Author Public Key
npub150stez8ze3qauexuwrtx0tkkxuuvv022nv0lg3dsq6ejk9n6psestaz9xuPublished at
2025-03-24 17:59:49Event JSON
{
"id": "651e9b5d96b214697e1f6831e7a97ade43bdc02b16c9807c6c11b7ac2d7db883",
"pubkey": "a3e0bc88e2cc41de64dc70d667aed63738c63d4a9b1ff445b006b32b167a0c33",
"created_at": 1742839189,
"kind": 1,
"tags": [
[
"proxy",
"https://cosocial.ca/users/evan/statuses/114218709138587290",
"activitypub"
]
],
"content": "One problem with ActivityPub is that there is not a standard format for errors returned from the API or federation protocol.\n\nI wrote a Fediverse Enhancement Proposal (FEP) to establish a standard set of error messages using RFC 9457, Problem Details for HTTP APIs.\n\nIt'd be great to get some review here:\n\nhttps://codeberg.org/fediverse/fep/src/branch/main/fep/c180/fep-c180.md\n\nComments and suggestions here (or just reply):\n\nhttps://codeberg.org/evanp/fep/issues\n\n..",
"sig": "06d0932ea55bd9438ad89ddd35f1992015ae4584704a18e8d835f18924398dd8071e45621e6f0541681b5b6ed258f1ca93521413449263ccb169a896e5ba0faf"
}