//
// Copyright 2021 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

/**
 *  Thrown when the user is:

 1) Sending a message with a PreKeyBundle that contains a different identity key than the previously known one.
 2) Receiving a new PreKeyWhisperMessage that has a different identity key than the previously known one.
 */

static NSString *UntrustedIdentityKeyException = @"AxolotlUnstrustedIdentityKeyException";

/**
 *  Thrown thrown when a message is received with an unknown PreKeyID.
 */

static NSString *InvalidKeyIdException = @"AxolotlInvalidKeyIdException";

/**
 *  Thrown when:

 1) Signature of Prekeys are not correctly signed.
 2) We received a key type that is not compatible with this version. (All keys should be Curve25519).
 */

static NSString *InvalidKeyException = @"AxolotlInvalidKeyException";

/**
 *  Thrown when receiving a message with no associated session for decryption.
 */

static NSString *NoSessionException = @"AxolotlNoSessionException";

/**
 *  Thrown when receiving a malformatted message.
 */

static NSString *InvalidMessageException = @"AxolotlInvalidMessageException";

/**
 *  Thrown when experiencing issues encrypting/decrypting a message symmetrically.
 */

static NSString *CipherException = @"AxolotlCipherIssue";

/**
 *  Thrown when detecting a message being sent a second time. (Replay attacks/bugs)
 */

static NSString *DuplicateMessageException = @"AxolotlDuplicateMessage";

/**
 *  Thrown when receiving a message send with a non-supported version of the TextSecure protocol.
 */

static NSString *LegacyMessageException = @"AxolotlLegacyMessageException";

/**
 *  Thrown when a client tries to initiate a session with a non-supported version.
 */

static NSString *InvalidVersionException = @"AxolotlInvalidVersionException";

NS_ASSUME_NONNULL_END