Implement send default and R/W to file

src/SmppSession.ts

@@ -1,14 +1,28 @@
 import {Job} from "./Job";
 
+// TODO: Implement on change event and propagate it to sessions
+// Do something like "onJobChange" here...
+// Maybe even make it default
 export interface SmppSession {
 	username: string,
 	password: string,
+	defaultSingleJob: Job;
+	defaultMultipleJob: Job;
+
+	getDefaultSingleJob(): Job;
+	setDefaultSingleJob(job: Job): void;
+	getDefaultMultipleJob(): Job;
+	setDefaultMultipleJob(job: Job): void;
+
+	getId(): number;
 
 	sendPdu(pdu: object, force?: boolean): Promise<object>;
 
 	sendSingle(job: Job): Promise<object>;
+	sendSingleDefault(): Promise<object>;
 
 	sendMultiple(job: Job): Promise<void>;
+	sendMultipleDefault(): Promise<void>;
 
 	cancelSendInterval(): void;
 
@@ -16,5 +30,5 @@ export interface SmppSession {
 
 	initialize(): void;
 
-	serialize(): string;
+	serialize(): object;
 }