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diff --git a/Firestore/Source/Core/FSTDatabaseInfo.mm b/Firestore/Source/Core/FSTDatabaseInfo.mm
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+++ b/Firestore/Source/Core/FSTDatabaseInfo.mm
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+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Firestore/Source/Core/FSTDatabaseInfo.h"
+
+#import "Firestore/Source/Model/FSTDatabaseID.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+#pragma mark - FSTDatabaseInfo
+
+@implementation FSTDatabaseInfo
+
+#pragma mark - Constructors
+
++ (instancetype)databaseInfoWithDatabaseID:(FSTDatabaseID *)databaseID
+                            persistenceKey:(NSString *)persistenceKey
+                                      host:(NSString *)host
+                                sslEnabled:(BOOL)sslEnabled {
+  return [[FSTDatabaseInfo alloc] initWithDatabaseID:databaseID
+                                      persistenceKey:persistenceKey
+                                                host:host
+                                          sslEnabled:sslEnabled];
+}
+
+/**
+ * Designated initializer.
+ *
+ * @param databaseID The database in the datastore.
+ * @param persistenceKey A unique identifier for this Firestore's local storage. Usually derived
+ *     from -[FIRApp appName].
+ * @param host The Firestore server hostname.
+ * @param sslEnabled Whether to use SSL when connecting.
+ */
+- (instancetype)initWithDatabaseID:(FSTDatabaseID *)databaseID
+                    persistenceKey:(NSString *)persistenceKey
+                              host:(NSString *)host
+                        sslEnabled:(BOOL)sslEnabled {
+  if (self = [super init]) {
+    _databaseID = databaseID;
+    _persistenceKey = [persistenceKey copy];
+    _host = [host copy];
+    _sslEnabled = sslEnabled;
+  }
+  return self;
+}
+
+#pragma mark - NSObject methods
+
+- (NSString *)description {
+  return [NSString
+      stringWithFormat:@"<FSTDatabaseInfo: databaseID:%@ host:%@>", self.databaseID, self.host];
+}
+
+@end
+
+NS_ASSUME_NONNULL_END