cveering on Nostr: I haven’t used it yet, but it seems like step 3 is handled by the nostr: protocol ...
I haven’t used it yet, but it seems like step 3 is handled by the nostr: protocol link prefix. 
cveering
npub1ava…t7kg
2023-10-12 17:55:48
in reply to nevent1q…pxzq
Author Public Key
npub1avar8zfzwswhq9xh3t0gc5l38pf5kesrkqe2s2ymrnymv3ddl2ps38t7kgSeen on
wss://relay.nostr.bandPublished at
2023-10-12 17:55:48Event JSON
{
"id": "240ff367662eac4059fad0126acdf9c6811f133652d29afaa7f201620403672a",
"pubkey": "eb3a338922741d7014d78ade8c53f138534b6603b032a8289b1cc9b645adfa83",
"created_at": 1697133348,
"kind": 1,
"tags": [
[
"e",
"6648015cf55e8582a5704ca3bfbee4d0cdce8da88ef4b1082f8230fa880a8094"
],
[
"e",
"bbcf28a1a18b9c61f0987ea3e6c76ac2d45de25a389b767305a8b60cef027c1a"
],
[
"p",
"8e27ffb5c9bb8cdd0131ade6efa49d56d401b5424d9fdf9a63e074d527b0715c"
],
[
"p",
"460c25e682fda7832b52d1f22d3d22b3176d972f60dcdc3212ed8c92ef85065c"
],
[
"p",
"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245"
],
[
"p",
"8e27ffb5c9bb8cdd0131ade6efa49d56d401b5424d9fdf9a63e074d527b0715c"
],
[
"imeta",
"url https://image.nostr.build/d8819983184b79855711eead7d73a7cb8f7b57e8e914d6349be31010f8e78899.jpg",
"blurhash eAR:E8RP-;of%M=}s:buWBkC~WRPNGofNG%2o2kCjtkBjat7WBayj[",
"dim 1125x829"
],
[
"imeta",
"url https://image.nostr.build/aeeb74cb0e46ae4385209beb400a01ed1f79134612d301df2c98c8a7bbbe6b9b.jpg",
"blurhash eYQvRXMyD%j[M{.lt7WBa{V@RkRjRjj[ofQ-j[baaykCcXjtoLj[e:",
"dim 1125x2062"
],
[
"r",
"https://image.nostr.build/d8819983184b79855711eead7d73a7cb8f7b57e8e914d6349be31010f8e78899.jpg"
],
[
"r",
"https://image.nostr.build/aeeb74cb0e46ae4385209beb400a01ed1f79134612d301df2c98c8a7bbbe6b9b.jpg"
]
],
"content": "I haven’t used it yet, but it seems like step 3 is handled by the nostr: protocol link prefix. https://image.nostr.build/d8819983184b79855711eead7d73a7cb8f7b57e8e914d6349be31010f8e78899.jpg https://image.nostr.build/aeeb74cb0e46ae4385209beb400a01ed1f79134612d301df2c98c8a7bbbe6b9b.jpg ",
"sig": "f4253fa3e6574dbb2c70899e37d89d9b6784185a57c5975deae672f32da032c2b115f48fa180575725f4d9dcfc8d29e94947a4e0f15136a86f43cccbe44d91ca"
}