diff --git a/sdk/logical/audit.go b/sdk/logical/audit.go
new file mode 100644
index 000000000000..f3bf622b3d97
--- /dev/null
+++ b/sdk/logical/audit.go
@@ -0,0 +1,19 @@
+package logical
+
+type LogInput struct {
+	Type                string
+	Auth                *Auth
+	Request             interface{}
+	Response            interface{}
+	OuterErr            error
+	NonHMACReqDataKeys  []string
+	NonHMACRespDataKeys []string
+}
+
+type MarshalOptions struct {
+	ValueHasher func(string) string
+}
+
+type OptMarshaler interface {
+	MarshalJSONWithOptions(*MarshalOptions) ([]byte, error)
+}