Migrate commands/events into payload to enable more generic message p…

…assing (#3)

Modify existing message format to migrate commands/events into a payload section and utilize destination header in root of RelayMessage

proto/relay.proto

@@ -9,17 +9,35 @@ import "self_serve/orb.proto";
 
 // Service Definitions
 service OrbService {
-  rpc OrbConnect(stream OrbEvent) returns (stream OrbCommand);
+  rpc OrbConnect(stream RelayMessage) returns (stream RelayMessage);
 }
 
 service AppService {
-  rpc AppConnect(stream AppEvent) returns (stream AppCommand);
+  rpc AppConnect(stream RelayMessage) returns (stream RelayMessage);
 }
 
 service BackendService {
   rpc RequestOrbUpdateConfig(config.OrbUpdateConfigRequest) returns (config.OrbUpdateConfigResponse);
 }
 
+message RelayPayload {
+  oneof payload {
+    OrbConnectRequestEvent orb_connect_request_event = 1;
+    AppConnectRequestEvent app_connect_request_event = 2;
+    OrbCommand orb_command = 3;
+    OrbEvent orb_event = 4;
+    AppCommand app_command = 5;
+    AppEvent app_event = 6;
+    BackendEvent backend_event = 7;
+    BackendCommand backend_command = 8;
+  }
+}
+
+message RelayMessage {
+  string destination = 1;
+  RelayPayload payload = 2;
+}
+
 message OrbConnectRequestEvent {
   string orb_id = 1;
   string auth_token = 2;

proto/self_serve/app.proto

@@ -6,9 +6,7 @@ message AppReceiveQRCommand {
   string qr_code = 1;
 }
 
-message AppConnectedToOrbCommand {
-  string orb_id = 1;
-}
+message AppConnectedToOrbCommand {}
 
 message AppShowStartSignupButtonCommand {}
 
@@ -20,6 +18,4 @@ message AppReceiveSignupResultCommand {
 
 message AppRequestStartSelfServeFlowEvent {}
 
-message AppRequestStartSignupEvent {
-  string orb_id = 1;
-}
+message AppRequestStartSignupEvent {}

proto/self_serve/orb.proto

@@ -4,15 +4,10 @@ package selfserve;
 
 message OrbStartSelfServeSignupCommand {}
 
-message OrbSelfServeSessionStartedEvent {
-  string app_id = 1;
-}
+message OrbSelfServeSessionStartedEvent {}
 
-message OrbSignupStartedEvent {
-  string app_id = 1;
-}
+message OrbSignupStartedEvent {}
 
 message OrbSignupCompletedEvent {
-  string app_id = 1;
-  bool success = 2;
+  bool success = 1;
 }