it's both, depends on whether the node you're pinning to is configured to announce its CIDs on a public DHT, private DHT, or none at all. the hardest things in computer science is naming things... you're looking for a rust crate to pin aka publish those CIDs?
yeah, basically the experience i want is that i run a rust binary and it kind of does all the stuff for me and then i can have other things query by cid and it magically works to have them pull from my rust binary. auto managed node deployment that users never have to think about
I *think* this community-maintained crate does what you're looking for but haven't tested it. crates.io/crates/rust-...