Re: Info about PEERSTORE service

[Christian Grothoff]

On 2/7/24 13:32, Big Boy wrote:
> Good day! My apologies for writing again about the PEERSTORE service, 
> but I have some more questions. Firstly, the store operation will store 
> the keys-value pair in the client's device, while the iterate operation 
> will look for the record locally? 

Yes.

> Secondly, if I provide a peer id to 
> the store operation, will it act as signing a value i.e not letting a 
> different peer to add more values/replace the value? 

Only the local peer can store data in the PEERSTORE, and other peers 
cannot see values the local peer stored into its PEERSTORE. Signatures 
are unnecessary.

> Third question, is 
> there a way to generate a peer identity by providing a hash key pair? 

I'm not sure what you mean by 'hash key pair', and there are different 
answers to this; but right now, each peer generates its peer identity at 
random, and there is no way to 'generate' it in any other way in the 
current implementation.
 > I
> want my users to be able to connect from multiple devices with some 
> credentials and access stored data. Thank you in advance!

Then PEERSTORE is the wrong solution, you need the DHT or FS or 
something else, but not PEERSTORE.

> În joi, 1 feb. 2024 la 23:43, Christian Grothoff <grothoff@gnunet.org 
> <mailto:grothoff@gnunet.org>> a scris:
>
>     Hi BB,
>
>     Peerstore is just a local database for information a peer keeps about
>     other peers (by their PeerIds, and yes, that's what you get as the CORE
>     ID and via the connect callbacks), it is *not* a DHT. The DHT is a
>     separate subsystem.
>
>     As it is the local (trusted) code storing information locally, the
>     expiration time is whatever the local code wants it to be.
>
>     I *think* the current implementation _may_ have a value size limit
>     around 64k, but in principle that could be fixed if desired.
>
>     I hope this answers your questions!
>
>     Happy hacking!
>
>     Christian
>
>     On 2/1/24 21:29, Big Boy wrote:
>      > Good day, I looked at the current documentation of GNUnet and I have
>      > some questions regarding the PEERSTORE service:
>      > - how is the PEERSTORE supposed to work? Is it like a DHT, where
>     some
>      > info is kept on each peer? Is it a reference of the said information
>      > kept locally on each peer? I looked at the bibliography available
>     and I
>      > haven't yet seen a reference regarding how the peerstore service is
>      > supposed to work.
>      > - what is the maximum size of the stored data in a key? And is
>     there a
>      > TTL similar to DHT for stored data?
>      > - what PeerIdentity can I use in order to store data as signed? I
>     would
>      > imagine that the CORE identity that's created during the connects()
>      > method could work, but does it remain the same for each peer or
>     is it
>      > changing constantly?
>      >
>      > Thank you in advance!