dat-ephemeral-ext-msg

Methods for implementing ephemeral messages as extension messages over Dat. Read the spec here.

``js
const {DatEphemeralExtMsg} = require('dweb-epemeral-ext-msg')
var datEphemeralExtMsg = new DatEphemeralExtMsg()

/**
* Step 1. Register the 'ephemeral' extension in the protocol streams
*/
var mySwarm = discoverySwarm(swarmDefaults({
stream (info) {
// add to the the protocol stream
var stream = hypercoreProtocol({
extensions: ['ephemeral']
})
// ...
return stream
}
}))

/**
* Step 2. Wire up each dat you create
*/
datEphemeralExtMsg.watchDat(dat) // can pass a ddatabase, hyperdb, or dwebfs reference as the dat
// datEphemeralExtMsg.unwatchDat(dat) when done

/**
* Step 3. Listen to events
*/
datEphemeralExtMsg.on('message', (dat, peer, {contentType, payload}) => {
// peer has sent payload of mimetype contentType for dat
})
datEphemeralExtMsg.on('received-bad-message', (err, dat, peer, messageBuffer) => {
// there was an error parsing a received message
})

/**
* Step 4. Use the API
*/
datEphemeralExtMsg.hasSupport(dat, peerId)
datEphemeralExtMsg.broadcast(dat, {contentType, payload})
datEphemeralExtMsg.send(dat, peerId, {contentType, payload})
``