Only send message to the primary device.

Fail send if sending message to self.

We do this because loki doesn't support multi-device sending at the moment.

SignalServiceKit/src/Messages/OWSMessageSender.m

@@ -1118,6 +1118,12 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
         // so that we can learn from the service whether or not there are
         // linked devices that we don't know about.
         OWSLogWarn(@"Sending a message with no device messages.");
+        
+        // LOKI: We don't handle linked devices yet so it's better to just exit early
+        // This would only occur if we're sending a message to ourself
+        NSError *error = OWSErrorMakeFailedToSendOutgoingMessageError();
+        [error setIsRetryable:NO];
+        return messageSend.failure(error);
     }
     
     // TODO: Update message here to show the pow cog icon
@@ -1514,7 +1520,13 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
         messageSend.isLocalNumber,
         messageSend.isUDSend);
 
+    // LOKI: Since we don't support multi-device sending yet, just send it to the primary device
+    NSMutableArray<NSNumber *> *deviceIds = @[@(OWSDevicePrimaryDeviceId)];
+
+    /* Original code
     NSMutableArray<NSNumber *> *deviceIds = [recipient.devices mutableCopy];
+     */
+    
     OWSAssertDebug(deviceIds);
 
     if (messageSend.isLocalNumber) {

SignalServiceKit/src/Network/API/Requests/OWSRequestFactory.m

@@ -356,7 +356,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 // LOKI: Convert Signal JSON messages to Loki messages
 // Refer to OWSMessageServiceParams for the Signal JSON params
-+ (NSDictionary *)lokiMessagesFromMessages:(NSArray *)messages
++ (NSArray *)lokiMessagesFromMessages:(NSArray *)messages
                                 nonceArray:(NSArray *)nonceArray
                                        ttl:(NSNumber *)ttl {
     NSMutableArray *modifiedMessages = [[NSMutableArray alloc] init];
@@ -394,15 +394,18 @@ NS_ASSUME_NONNULL_BEGIN
                                                  ttl: (NSNumber *)ttl
 {
     // NOTE: messages may be empty; See comments in OWSDeviceManager.
+    // This doesn't apply to loki since we don't have linked device support.
     OWSAssertDebug(recipientId.length > 0);
+    OWSAssertDebug(messages.count > 0);
     
-    NSDictionary *lokiMessages = [self lokiMessagesFromMessages:messages nonceArray:nonceArray ttl:ttl];
-   
-    NSString *path = [textSecureMessagesAPI stringByAppendingString:recipientId];
-    NSDictionary *parameters = @{
-                                 @"messages" : lokiMessages,
-                                 };
+    // Convert to loki json format
+    NSArray *lokiMessages = [self lokiMessagesFromMessages:messages nonceArray:nonceArray ttl:ttl];
+    OWSAssertDebug(lokiMessages.count > 0);
     
+    // Just send the first message
+    NSString *path = [textSecureMessagesAPI stringByAppendingString:recipientId];
+    NSDictionary *parameters = [lokiMessages objectAtIndex:0];
+   
     TSRequest *request = [TSRequest requestWithUrl:[NSURL URLWithString:path] method:@"PUT" parameters:parameters];
     return request;
 }