feat: cleaner auth state management

1. removes the "auth-state.update" event since it was bloated and fairly unnecessary
2. adds "creds.update" event that only sends the updated properties of the auth credentials
3. ensure the auth creds are not mutated anywhere, but only with the "creds.update" event
4. Separates the signal credentials from the auth credentials (kinda in progress)
5. in memory key store requires a save function to let one know when to save the keys

!BREAKING_CHANGE

src/Utils/validate-connection.ts

@@ -1,9 +1,8 @@
 import { Boom } from '@hapi/boom'
-import { randomBytes } from 'crypto'
 import { proto } from '../../WAProto'
-import type { AuthenticationState, SocketConfig, SignalKeyStore, AuthenticationCreds, KeyPair, LTHashState } from "../Types"
-import { Curve, hmacSign, signedKeyPair } from './crypto'
-import { encodeInt, generateRegistrationId } from './generics'
+import type { SocketConfig, AuthenticationCreds, SignalCreds } from "../Types"
+import { Curve, hmacSign } from './crypto'
+import { encodeInt } from './generics'
 import { BinaryNode, S_WHATSAPP_NET, jidDecode, Binary, getAllBinaryNodeChildren } from '../WABinary'
 import { createSignalIdentity } from './signal'
 
@@ -41,7 +40,7 @@ export const generateLoginNode = (userJid: string, config: Pick<SocketConfig, 'v
 }
 
 export const generateRegistrationNode = (
-  { registrationId, signedPreKey, signedIdentityKey }: Pick<AuthenticationCreds, 'registrationId' | 'signedPreKey' | 'signedIdentityKey'>,
+  { registrationId, signedPreKey, signedIdentityKey }: SignalCreds,
   config: Pick<SocketConfig, 'version' | 'browser'>
 ) => {
   const appVersionBuf = new Uint8Array(Buffer.from(ENCODED_VERSION, "base64"));
@@ -82,84 +81,6 @@ export const generateRegistrationNode = (
   return proto.ClientPayload.encode(registerPayload).finish()
 }
 
-export const initInMemoryKeyStore = (
-  { preKeys, sessions, senderKeys, appStateSyncKeys, appStateVersions }: { 
-    preKeys?: { [k: number]: KeyPair },
-    sessions?: { [k: string]: any },
-    senderKeys?: { [k: string]: any }
-    appStateSyncKeys?: { [k: string]: proto.IAppStateSyncKeyData },
-    appStateVersions?: { [k: string]: LTHashState },
-  } = { },
-) => {
-  preKeys = preKeys || { }
-  sessions = sessions || { }
-  senderKeys = senderKeys || { }
-  appStateSyncKeys = appStateSyncKeys || { }
-  appStateVersions = appStateVersions || { }
-  return {
-    preKeys,
-    sessions,
-    senderKeys,
-    appStateSyncKeys,
-    appStateVersions,
-    getPreKey: keyId => preKeys[keyId],
-    setPreKey: (keyId, pair) => {
-      if(pair) preKeys[keyId] = pair
-      else delete preKeys[keyId]
-    },
-    getSession: id => sessions[id],
-    setSession: (id, item) => {
-      if(item) sessions[id] = item
-      else delete sessions[id]
-    },
-    getSenderKey: id => {
-      return senderKeys[id]
-    },
-    setSenderKey: (id, item) => {
-      if(item) senderKeys[id] = item
-      else delete senderKeys[id]
-    },
-    getAppStateSyncKey: id => {
-      const obj = appStateSyncKeys[id]
-      if(obj) {
-        return proto.AppStateSyncKeyData.fromObject(obj)
-      }
-    },
-    setAppStateSyncKey: (id, item) => {
-      if(item) appStateSyncKeys[id] = item
-      else delete appStateSyncKeys[id]
-    },
-    getAppStateSyncVersion: id => {
-      const obj = appStateVersions[id]
-      if(obj) {
-        return obj
-      }
-    },
-    setAppStateSyncVersion: (id, item) => {
-      if(item) appStateVersions[id] = item
-      else delete appStateVersions[id]
-    }
-  } as SignalKeyStore
-}
-
-export const initAuthState = (): AuthenticationState => {
-  const identityKey = Curve.generateKeyPair()
-  return {
-    creds: {
-      noiseKey: Curve.generateKeyPair(),
-      signedIdentityKey: identityKey,
-      signedPreKey: signedKeyPair(identityKey, 1),
-      registrationId: generateRegistrationId(),
-      advSecretKey: randomBytes(32).toString('base64'),
-
-      nextPreKeyId: 1,
-      firstUnuploadedPreKeyId: 1,
-      serverHasPreKeys: false
-    },
-    keys: initInMemoryKeyStore()
-  }
-}
-
 export const configureSuccessfulPairing = (
   stanza: BinaryNode,
   { advSecretKey, signedIdentityKey, signalIdentities }: Pick<AuthenticationCreds, 'advSecretKey' | 'signedIdentityKey' | 'signalIdentities'>