chore: create module directory for discovery

lib/discovery/README.md

@@ -0,0 +1,42 @@
+# Discovery
+
+> Discover other peers via the DHT or MDNS and replicate with them
+
+## Usage
+
+The `Discovery` class provides an abstraction layer that allows peer discovery using either a [distributed hash table](https://en.wikipedia.org/wiki/Distributed_hash_table) (DHT) via [hyperswarm](https://npmjs.com/hyperswarm) or [Multicast DNS](https://en.wikipedia.org/wiki/Multicast_DNS) (mDNS) via [multicast-service-discovery](https://npmjs.com/multicast-service-discovery).
+
+```js
+import Hypercore from 'hypercore'
+import { KeyManager } from '@mapeo/crypto'
+import { Discovery } from './index.js'
+
+const rootKey = KeyManager.generateRootKey()
+const keyManager = new KeyManager(rootKey)
+const identityKeyPair = keyManager.getIdentityKeypair()
+
+const core = new Hypercore()
+await core.ready()
+
+const discover = new Discovery({
+  identityKeyPair,
+  mdns: true,
+  dht: true,
+})
+
+await discover.ready()
+
+discover.on('connection', (connection, peer) => {
+  core.replicate(connection)
+})
+
+await discover.join(core.discoveryKey)
+```
+
+## API Docs
+
+TODO!
+
+## Tests
+
+The tests for this module are in [tests/discovery.js](../../tests/discovery.js)

tests/discovery.js

@@ -5,7 +5,7 @@ import ram from 'random-access-memory'
 import createTestnet from '@hyperswarm/testnet'
 
 import { createCoreKeyPair, createIdentityKeys } from './helpers/index.js'
-import { Discovery } from '../lib/discovery.js'
+import { Discovery } from '../lib/discovery/index.js'
 
 test('discovery - dht/hyperswarm', async (t) => {
   t.plan(2)