Added support for sending + toggling disappearing messages

src/WAConnection/Constants.ts

@@ -7,6 +7,7 @@ export const WS_URL = 'wss://web.whatsapp.com/ws'
 export const DEFAULT_ORIGIN = 'https://web.whatsapp.com'
 
 export const KEEP_ALIVE_INTERVAL_MS = 20*1000
+export const WA_DEFAULT_EPHEMERAL = 7*24*60*60
 
 // export the WAMessage Prototypes
 export { proto as WAMessageProto }
@@ -224,6 +225,10 @@ export interface WAChat {
     spam: 'false' | 'true'
     modify_tag: string
     name?: string
+    /** when ephemeral messages were toggled on */
+    eph_setting_ts?: string
+    /** how long each message lasts for */
+    ephemeral?: string
     
     // Baileys added properties
     messages: KeyedDB<WAMessage, string>
@@ -367,6 +372,9 @@ export interface MessageOptions {
     forceNewMediaOptions?: boolean
     /** Wait for the message to be sent to the server (default true) */
     waitForAck?: boolean
+    /** Should it send as a disappearing messages. 
+     * By default 'chat' -- which follows the setting of the chat */
+    sendEphemeral?: 'chat' | boolean
 }
 export interface WABroadcastListInfo {
     status: number