fix: remove uuid dependency (#68)

Removes the dependency on uuid. Use a simpler random string generator instead.

package.json

@@ -154,15 +154,13 @@
     "multihashes": "^4.0.3",
     "p-defer": "^4.0.0",
     "uint8arraylist": "^2.3.3",
-    "uint8arrays": "^4.0.2",
-    "uuid": "^9.0.0"
+    "uint8arrays": "^4.0.2"
   },
   "devDependencies": {
     "@libp2p/interface-mocks": "^8.0.1",
     "@libp2p/peer-id-factory": "^1.0.19",
     "@protobuf-ts/plugin": "^2.8.0",
     "@protobuf-ts/protoc": "^2.8.0",
-    "@types/uuid": "^8.3.4",
     "aegir": "^37.6.6",
     "it-first": "^2.0.0",
     "libp2p": "^0.40.0"

src/transport.ts

@@ -7,16 +7,15 @@ import * as p from '@libp2p/peer-id'
 import type { Multiaddr } from '@multiformats/multiaddr'
 import * as multihashes from 'multihashes'
 import defer from 'p-defer'
-import { v4 as genUuid } from 'uuid'
 import { fromString as uint8arrayFromString } from 'uint8arrays/from-string'
 import { concat } from 'uint8arrays/concat'
-
 import { dataChannelError, inappropriateMultiaddr, unimplemented, invalidArgument } from './error.js'
 import { WebRTCMultiaddrConnection } from './maconn.js'
 import { DataChannelMuxerFactory } from './muxer.js'
 import type { WebRTCDialOptions } from './options.js'
 import * as sdp from './sdp.js'
 import { WebRTCStream } from './stream.js'
+import { genUfrag } from './util.js'
 
 const log = logger('libp2p:webrtc:transport')
 
@@ -142,7 +141,7 @@ export class WebRTCTransport implements Transport {
       dataChannelOpenPromise.reject(dataChannelError('data', error))
     }
 
-    const ufrag = 'libp2p+webrtc+v1/' + genUuid().replaceAll('-', '')
+    const ufrag = 'libp2p+webrtc+v1/' + genUfrag(32)
 
     // Create offer and munge sdp with ufrag = pwd. This allows the remote to
     // respond to STUN messages without performing an actual SDP exchange.

src/util.ts

@@ -3,3 +3,6 @@ export const nopSource = {
 }
 
 export const nopSink = async (_: any) => {}
+
+const charset = Array.from('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/')
+export const genUfrag = (len: number): string => [...Array(len)].map(() => charset.at(Math.floor(Math.random() * charset.length))).join('')