send a message to a specific peer

[blackshadowsoftwareltd]

suppose I have connected with many peers in a swarm. I wanna send my message to a specific one or multiple (specific peers). how can I do that?
I have searched on Google and AI. but not got any proper solution. Thanks.

[mxinden]

You can use libp2p-request-response. See e.g. the JSON Codec:

https://github.com/libp2p/rust-libp2p/blob/master/protocols/request-response/src/json.rs

[blackshadowsoftwareltd]

I am not understanding how can I bind the swarm with Codec. could you give me any code snippets, please? thanks.
I am a beginner in rust.

[blackshadowsoftwareltd]

could you give a solution?

[mxinden]

You can find a code snipped with Swarm in https://github.com/libp2p/rust-libp2p/blob/master/protocols/request-response/tests/ping.rs.

[kehiy]

hi @blackshadowsoftwareltd,

See this part of document.
The RequestResponse can do it. (from docs and the rust-libp2p exact code)

[blackshadowsoftwareltd]

could you share your swarm config and behavior?
basically, this method does not exist in my swarm.
thanks

[kehiy]

@blackshadowsoftwareltd , check the message again I update it with a document link.

[blackshadowsoftwareltd]

Thank you so much for your opinion. I have already used Request Response behavior to send a specific peer.