init.js

function init(m, email, password) {
		// generate the database encryption key
		vendor.nCrypto
			.pbkdf2(
				Buffer.from(m.mnemonic, "utf8"),
				Buffer.from(databaseKeySeed, "utf8"),
				2048,
				64,
				"sha512"
			)
			.then(function(buffer) {
				dbKey = buffer.slice(0, 32);

				// setup unencrypted local DB changefeed
				PouchDB.plugin(vendor.cryptoPouch);
				db = new PouchDB(localDBPrefix + m.dbName);
				db.crypto({
					key: dbKey
				});

				db
					.changes({
						since: "now",
						live: true,
						include_docs: true
					})
					.on("change", function(change) {
						if (change.doc && change.doc.message) {
							changefeed(change.doc);
						}
					})
					.on("error", console.log);

			});

		// setup remote DB
		var remoteDB = new PouchDB(remoteDBAddress);

		// setup local DB
		var localDB = new PouchDB(localDBPrefix + m.dbName);

		localDB.replicate
			.from(remoteDB)
			.on("complete", function() {
				localDB
					.sync(remoteDB, {
						live: true,
						retry: true
					})
			})
}

I am not sure If I understood. Can you create 2 localDBPrefix + m.dbName PouchDBs?
What does changefeed does?