Limit voice calls daily as well

// FREEBIE

src/main/java/org/whispersystems/textsecuregcm/configuration/RateLimitsConfiguration.java

@@ -26,6 +26,9 @@ public class RateLimitsConfiguration {
   @JsonProperty
   private RateLimitConfiguration voiceDestination = new RateLimitConfiguration(2, 1.0 / 2.0);
 
+  @JsonProperty
+  private RateLimitConfiguration voiceDestinationDaily = new RateLimitConfiguration(10, 10.0 / (24.0 * 60.0));
+
   @JsonProperty
   private RateLimitConfiguration verifyNumber = new RateLimitConfiguration(2, 2);
 
@@ -79,6 +82,10 @@ public class RateLimitsConfiguration {
     return voiceDestination;
   }
 
+  public RateLimitConfiguration getVoiceDestinationDaily() {
+    return voiceDestinationDaily;
+  }
+
   public RateLimitConfiguration getVerifyNumber() {
     return verifyNumber;
   }

src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java

@@ -128,6 +128,7 @@ public class AccountController {
         break;
       case "voice":
         rateLimiters.getVoiceDestinationLimiter().validate(number);
+        rateLimiters.getVoiceDestinationDailyLimiter().validate(number);
         break;
       default:
         throw new WebApplicationException(Response.status(422).build());

src/main/java/org/whispersystems/textsecuregcm/limits/RateLimiters.java

@@ -25,6 +25,7 @@ public class RateLimiters {
 
   private final RateLimiter smsDestinationLimiter;
   private final RateLimiter voiceDestinationLimiter;
+  private final RateLimiter voiceDestinationDailyLimiter;
   private final RateLimiter verifyLimiter;
 
   private final RateLimiter attachmentLimiter;
@@ -44,6 +45,10 @@ public class RateLimiters {
                                                    config.getVoiceDestination().getBucketSize(),
                                                    config.getVoiceDestination().getLeakRatePerMinute());
 
+    this.voiceDestinationDailyLimiter = new RateLimiter(cacheClient, "voxDestinationDaily",
+                                                        config.getVoiceDestinationDaily().getBucketSize(),
+                                                        config.getVoiceDestinationDaily().getLeakRatePerMinute());
+
     this.verifyLimiter = new RateLimiter(cacheClient, "verify",
                                          config.getVerifyNumber().getBucketSize(),
                                          config.getVerifyNumber().getLeakRatePerMinute());
@@ -106,6 +111,10 @@ public class RateLimiters {
     return voiceDestinationLimiter;
   }
 
+  public RateLimiter getVoiceDestinationDailyLimiter() {
+    return voiceDestinationDailyLimiter;
+  }
+
   public RateLimiter getVerifyLimiter() {
     return verifyLimiter;
   }