Fix a missing function and dont blow up on delivery receipts

js/api.js

@@ -350,6 +350,10 @@ window.textsecure.api = function() {
 				else
 					console.log("Got invalid message from server: " + message);
 			};
+
+			socketWrapper.send = function(msg) {
+				socket.send(msg);
+			}
 		};
 		connect();
 

js/crypto.js

@@ -792,6 +792,8 @@ window.textsecure.crypto = function() {
 				throw new Error("Bad version byte");
 			var from = proto.source + "." + (proto.sourceDevice == null ? 0 : proto.sourceDevice);
 			return handlePreKeyWhisperMessage(from, getString(proto.message));
+		case textsecure.protos.IncomingPushMessageProtobuf.Type.RECEIPT:
+			return Promise.resolve(null);
 		default:
 			return new Promise(function(resolve, reject) { reject(new Error("Unknown message type")); });
 		}

js/helpers.js

@@ -656,6 +656,11 @@ window.textsecure.subscribeToPush = function(message_callback) {
 			console.log("Successfully decoded message with id: " + message.id);
 			socket.send(JSON.stringify({type: 1, id: message.id}));
 			return textsecure.crypto.handleIncomingPushMessageProto(proto).then(function(decrypted) {
+				// Delivery receipt
+				if (decrypted === null)
+					//TODO: Pass to UI
+					return;
+
 				// Now that its decrypted, validate the message and clean it up for consumer processing
 				// Note that messages may (generally) only perform one action and we ignore remaining fields
 				// after the first action.

protos/IncomingPushMessageSignal.proto

@@ -10,6 +10,7 @@ message IncomingPushMessageSignal {
     KEY_EXCHANGE  = 2;
     PREKEY_BUNDLE = 3;
     PLAINTEXT     = 4;
+    RECEIPT       = 5;
   }
   optional Type   type         = 1;
   optional string source       = 2;
@@ -49,4 +50,4 @@ message PushMessageContent {
   repeated AttachmentPointer attachments = 2;
   optional GroupContext      group       = 3;
   optional uint32            flags       = 4;
-}
+}