1_declare_pubsub.md

Getting in and getting out

Now that we have our basic class structure laid out, its time to get into the details. The libp2p API specifies a number of functions for pubsub under the libp2p.pubsub namespace that we will use in the implementation details of our chat class. In particular, we will use the subscribe, unsubscribe, and publish functions to join/leave a specific chatroom and then send messages to that chatroom. The full pubsub API can be found here.

Try it yourself

• Tell libp2p to start the node in the start function
• Tell libp2p to stop the node in the stop function
• Use libp2p.pubsub.subscribe to subscribe to the topic defined in the constructor in your join function
• Use libp2p.pubsub.unsubscribe to unsubscribe from the topic in the leave function
• Use libp2p.pubsub.publish to send a message to the topic in the send function

** Template **

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** Solution **

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** Previous Chapter Solution **

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