refactor(client): make {decode,format}Address() be static methods of Client

src/Client.js

@@ -10,10 +10,20 @@ import {
     KeepAlive
 } from './Protocol.js'
 import { EventEmitter } from 'events'
+import Long             from 'long'
 
 const WebSocket = (typeof window === 'undefined' ? import('ws'): window.WebSocket)
 
 export class Client extends EventEmitter {
+    static formatAddress(address) {
+        const int = BigInt(address)
+        return int.toString(16).padStart(16, '0').match(/.{1,4}/g).join(':')
+    }
+
+    static decodeAddress(address) {
+        return Long.fromString(BigInt('0x' + address.replace(/:/g, '')).toString(10))
+    }
+
     #gateway
     #ws
     #id

src/index.js

@@ -1,13 +1,2 @@
-import Long       from 'long'
 import { Client } from './Client.js'
-
-export function formatAddress(address) {
-    const int = BigInt(address)
-    return int.toString(16).padStart(16, '0').match(/.{1,4}/g).join(':')
-}
-
-export function decodeAddress(address) {
-    return Long.fromString(BigInt('0x' + address.replace(/:/g, '')).toString(10))
-}
-
 export { Client }