Add dependencies/vendor (whatsapp)

vendor/go.mau.fi/libsignal/state/store/MessageKeyStore.go

@@ -0,0 +1,21 @@
+package store
+
+import (
+	"go.mau.fi/libsignal/keys/message"
+)
+
+// MessageKey store is an interface describing the optional local storage
+// of message keys.
+type MessageKey interface {
+	// Load a local message key by id
+	LoadMessageKey(keyID uint32) *message.Keys
+
+	// Store a local message key
+	StoreMessageKey(keyID uint32, key *message.Keys)
+
+	// Check to see if the store contains a message key with id.
+	ContainsMessageKey(keyID uint32) bool
+
+	// Delete a message key from local storage.
+	RemoveMessageKey(keyID uint32)
+}