Add some helpers

1 files changed, 12 insertions, 0 deletions

diff --git a/src/helpers/decodeClientDataJSON.ts b/src/helpers/decodeClientDataJSON.ts
new file mode 100644
index 0000000..b957d60
--- /dev/null
+++ b/src/helpers/decodeClientDataJSON.ts
@@ -0,0 +1,12 @@
+import asciiToBinary from './asciiToBinary';
+
+/**
+ * Decode an authenticator's base64-encoded clientDataJSON to JSON
+ *
+ * @param data
+ * @returns {Object} - the data as JSON
+ */
+export default function decodeClientDataJSON(data: string) {
+  const toString = asciiToBinary(data);
+  return JSON.parse(toString);
+}