firebase-ios-sdk/FirebaseInstallations/Source/Library/IIDMigration/FIRInstallationsIIDCheckinStore.h

/*
 * Copyright 2019 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 <Foundation/Foundation.h>

@class FIRInstallationsStoredIIDCheckin;
@class FBLPromise<ValueType>;

NS_ASSUME_NONNULL_BEGIN

@interface FIRInstallationsIIDCheckinStore : NSObject

/*
 * Tries to read IID checking from the Keychain (see also `FIRInstanceIDCheckinStore`).
 * @return Returns a promise that is resolved with the checkin object when all required data found
 * in the Keychain. The promise is rejected when the data is missing.
 */
- (FBLPromise<FIRInstallationsStoredIIDCheckin *> *)existingCheckin;

@end

NS_ASSUME_NONNULL_END