Added fetch agent

src/Tests/Tests.Messages.ts

@@ -202,9 +202,15 @@ WAConnectionTest('Messages', conn => {
             for (let i = 0; i < messages.length;i++) {
                 assert.deepEqual (messages[i].key, msgs[i].key, `failed equal at ${i}`)
             }
-        }
 
-        
+            cursor = msgs[0].key
+
+            msgs = await conn.fetchMessagesFromWA (testJid, 20, cursor)
+            messages = (await conn.loadMessages (testJid, 20, cursor)).messages
+            for (let i = 0; i < messages.length;i++) {
+                assert.deepEqual (messages[i].key, msgs[i].key, `failed equal at ${i}`)
+            }
+        }
     })
     it('should deliver a message', async () => {
         const waitForUpdate = 

src/WAConnection/0.Base.ts

@@ -377,7 +377,7 @@ export class WAConnection extends EventEmitter {
             method,
             body,
             headers: { Origin: DEFAULT_ORIGIN, ...(headers || {}) },
-            agent: agent || this.connectOptions.agent
+            agent: agent || this.connectOptions.fetchAgent
         })
     )
     generateMessageTag (longTag: boolean = false) {

src/WAConnection/Constants.ts

@@ -84,8 +84,10 @@ export type WAConnectOptions = {
     /** max time for the phone to respond to a connectivity test */
     phoneResponseTime?: number
     connectCooldownMs?: number
-    /** agent which can be used for proxying connections */
+    /** agent used for WS connections */
     agent?: Agent
+    /** agent used for fetch requests -- uploading/downloading media */
+    fetchAgent?: Agent
 }
 /** from: https://stackoverflow.com/questions/3809401/what-is-a-good-regular-expression-to-match-a-url */
 export const URL_REGEX = /[-a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_+.~#?&//=]*)?/gi