Add dependencies/vendor (whatsapp)

vendor/go.mau.fi/whatsmeow/appstate/errors.go

@@ -0,0 +1,19 @@
+// Copyright (c) 2021 Tulir Asokan
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package appstate
+
+import "errors"
+
+// Errors that this package can return.
+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")
+)