I have a large file. I want to transfer this file block by block.

[blackshadowsoftwareltd]

I have a large file. I want to transfer this file block by block (1 MB per transfer) from one device to another. how can I do that using the ibp2p package?

[thomaseizinger]

You can certainly do that. You can:

• look into using an existing protocol like https://github.com/ipfs-rust/libp2p-bitswap
• implement your own using libp2p-request-response if you want to follow a request-response model
• roll a custom protocol by implementing NetworkBehaviour and ConnectionHandler if you e.g. want to use more of a streaming approach

For the most part, rust-libp2p deals with the abstractions around managing connections for you and running protocols over them concurrently. A very simple example of a file-sharing protocol is in https://github.com/libp2p/rust-libp2p/tree/master/examples/file-sharing but that one is not using blocks.

If you want to implement your own protocol, I would suggest to first define on paper, what your messages look like. Once that is laid out, we can help you in mapping such a protocol to our abstractions.