diff --git a/src/enums.js b/src/enums.js
new file mode 100644
index 0000000..1ece054
--- /dev/null
+++ b/src/enums.js
@@ -0,0 +1,31 @@
+/*
+Copyright 2021 Yarmo Mackenbach
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+const proofAccess =  {
+  GENERIC: 0,
+  NOCORS: 1,
+  GRANTED: 2,
+  SERVER: 3
+}
+Object.freeze(proofAccess)
+
+const proofFormat =  {
+  JSON: 0,
+  TEXT: 1,
+}
+Object.freeze(proofFormat)
+
+exports.proofAccess = proofAccess
+exports.proofFormat = proofFormat
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