var (
	ErrMissingPreviousSetValueOperation = errors.New("missing value MAC of previous SET operation")
	ErrMismatchingLTHash                = errors.New("mismatching LTHash")
	ErrMismatchingPatchMAC              = errors.New("mismatching patch MAC")
	ErrMismatchingContentMAC            = errors.New("mismatching content MAC")
	ErrMismatchingIndexMAC              = errors.New("mismatching index MAC")
	ErrKeyNotFound                      = errors.New("didn't find app state key")
)

var AllPatchNames = [...]WAPatchName{WAPatchCriticalBlock, WAPatchCriticalUnblockLow, WAPatchRegularHigh, WAPatchRegular, WAPatchRegularLow}

type DownloadExternalFunc func(*waProto.ExternalBlobReference) ([]byte, error)

type ExpandedAppStateKeys struct {
	Index           []byte
	ValueEncryption []byte
	ValueMAC        []byte
	SnapshotMAC     []byte
	PatchMAC        []byte
}

type HashState struct {
	Version uint64
	Hash    [128]byte
}

type Mutation struct {
	Operation waProto.SyncdMutation_SyncdOperation
	Action    *waProto.SyncActionValue
	Index     []string
	IndexMAC  []byte
	ValueMAC  []byte
}

type PatchList struct {
	Name           WAPatchName
	HasMorePatches bool
	Patches        []*waProto.SyncdPatch
	Snapshot       *waProto.SyncdSnapshot
}

type Processor struct {
	Store *store.Device
	Log   waLog.Logger
	// contains filtered or unexported fields
}

type WAPatchName string

const (
	// WAPatchCriticalBlock contains the user's settings like push name and locale.
	WAPatchCriticalBlock WAPatchName = "critical_block"
	// WAPatchCriticalUnblockLow contains the user's contact list.
	WAPatchCriticalUnblockLow WAPatchName = "critical_unblock_low"
	// WAPatchRegularLow contains some local chat settings like pin, archive status, and the setting of whether to unarchive chats when messages come in.
	WAPatchRegularLow WAPatchName = "regular_low"
	// WAPatchRegularHigh contains more local chat settings like mute status and starred messages.
	WAPatchRegularHigh WAPatchName = "regular_high"
	// WAPatchRegular contains protocol info about app state patches like key expiration.
	WAPatchRegular WAPatchName = "regular"
)