NIP-89 defines application recommendation and application handler events.
Data Vending Machines make extend use of these capabilities; DVMs should announce their capabilities by creating an application handler event with a k of the handled job request kind.
A kind:31990 (application handler) event should use it’s content profile data to explain to an end-user its specific characteristics.
Clients SHOULD show this information as a way to allow users to choose the specific DVM they want to use.
This is where the long-tail of DVMs can be explored.
Example
DVM supporting kind:5100 – in Dali style
This NIP-89 acts as a sales-pitch for the DVM to explain to a user exactly what they can expect from interacting with this DVM
{
"created_at": 1693484377,
"content": "{
\"name\": \"Dali Vending Machine\",
\"image\": \"https://cdn.nostr.build/i/fb207be87d748ad927f52a063c221d1d97ef6d75e660003cb6e85baf2cd2d64e.jpg\",
\"about\": \"I'm Dali re-incarnated, faster and cheaper\",
\"encryptionSupported\": True,
}",
"tags": [
[ "d", "td51xbgxwbt5116r" ],
[ "k", "5100" ]
],
"kind": 31990,
"pubkey": "6b37d5dc88c1cbd32d75b713f6d4c2f7766276f51c9337af9d32c8d715cc1b93",
}
DVM supporting kind:5300
This NIP-89 acts as a sales-pitch for the DVM to explain to a user exactly what they can expect from interacting with this DVM
{
"created_at": 1693484377,
"content": "{
\"name\": \"You might have missed\",
\"image\": \"https://cdn.nostr.build/i/fb207be87d748ad927f52a063c221d1d97ef6d75e660003cb6e85baf2cd2d64e.jpg\",
\"about\": \"My goal is to help you keep up – or catch up – with your world, no matter how much time you spend on t̶w̶i̶t̶t̶e̶r̶ nostr.\",
\"encryptionSupported\": False,
}",
"tags": [
[ "d", "td51xbgxwbt5116r" ],
[ "k", "5300" ]
],
"kind": 31990,
"pubkey": "6b37d5dc88c1cbd32d75b713f6d4c2f7766276f51c9337af9d32c8d715cc1b93",
}