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42 lines
1.5 KiB
Markdown
42 lines
1.5 KiB
Markdown
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# Protocol Multiplexing using rpc-style protobufs with libp2p
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This example shows how to use protobufs to encode and transmit information between libp2p hosts using libp2p Streams.
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This example expects that you are already familiar with the [echo example](https://github.com/libp2p/go-libp2p/tree/master/examples/echo).
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## Build
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From the `go-libp2p/examples` directory run the following:
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```sh
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> cd multipro/
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> go build
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```
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## Usage
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```sh
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> ./multipro
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```
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## Details
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The example creates two libp2p Hosts supporting 2 protocols: ping and echo.
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Each protocol consists of RPC-style requests and responses and each request and response is a typed protobufs message (and a go data object).
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This is a different pattern than defining a whole p2p protocol as one protobuf message with lots of optional fields (as can be observed in various p2p-lib protocols using protobufs such as dht).
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The example shows how to match async received responses with their requests. This is useful when processing a response requires access to the request data.
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The idea is to use libp2p protocol multiplexing on a per-message basis.
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### Features
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1. 2 fully implemented protocols using an RPC-like request-response pattern - Ping and Echo
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2. Scaffolding for quickly implementing new app-level versioned RPC-like protocols
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3. Full authentication of incoming message data by author (who might not be the message's sender peer)
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4. Base p2p format in protobufs with fields shared by all protocol messages
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5. Full access to request data when processing a response.
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## Author
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@avive
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