Check for device keys in memory before requesting more

// FREEBIE

js/libtextsecure.js

@@ -38140,6 +38140,15 @@ axolotlInternal.RecipientRecord = function() {
             delete tempKeys[encodedNumber];
             return Promise.resolve();
         },
+        needKeysForDevice: function(encodedNumber) {
+            if (tempKeys[encodedNumber] !== undefined) {
+                return Promise.resolve(false);
+            } else {
+                return textsecure.protocol_wrapper.hasOpenSession(encodedNumber).then(function(result) {
+                    return !result;
+                });
+            }
+        },
 
         getDeviceObjectsForNumber: function(number) {
             return textsecure.storage.axolotl.getIdentityKey(number).then(function(identityKey) {
@@ -39805,8 +39814,8 @@ OutgoingMessage.prototype = {
     sendToNumber: function(number) {
         return textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devicesForNumber) {
             return Promise.all(devicesForNumber.map(function(device) {
-                return textsecure.protocol_wrapper.hasOpenSession(device.encodedNumber).then(function(result) {
-                    if (!result) {
+                return textsecure.storage.devices.needKeysForDevice(device.encodedNumber).then(function(result) {
+                    if (result) {
                         return this.getKeysForNumber(number,
                             [parseInt(textsecure.utils.unencodeNumber(device.encodedNumber)[1])]
                         ).catch(function(error) {

libtextsecure/outgoing_message.js

@@ -116,8 +116,8 @@ OutgoingMessage.prototype = {
     sendToNumber: function(number) {
         return textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devicesForNumber) {
             return Promise.all(devicesForNumber.map(function(device) {
-                return textsecure.protocol_wrapper.hasOpenSession(device.encodedNumber).then(function(result) {
-                    if (!result) {
+                return textsecure.storage.devices.needKeysForDevice(device.encodedNumber).then(function(result) {
+                    if (result) {
                         return this.getKeysForNumber(number,
                             [parseInt(textsecure.utils.unencodeNumber(device.encodedNumber)[1])]
                         ).catch(function(error) {

libtextsecure/storage/devices.js

@@ -40,6 +40,15 @@
             delete tempKeys[encodedNumber];
             return Promise.resolve();
         },
+        needKeysForDevice: function(encodedNumber) {
+            if (tempKeys[encodedNumber] !== undefined) {
+                return Promise.resolve(false);
+            } else {
+                return textsecure.protocol_wrapper.hasOpenSession(encodedNumber).then(function(result) {
+                    return !result;
+                });
+            }
+        },
 
         getDeviceObjectsForNumber: function(number) {
             return textsecure.storage.axolotl.getIdentityKey(number).then(function(identityKey) {