1 files changed, 17 insertions, 0 deletions
diff --git a/packages/server/src/helpers/decodeAttestationObject.ts b/packages/server/src/helpers/decodeAttestationObject.ts
new file mode 100644
index 0000000..224734e
--- /dev/null
+++ b/packages/server/src/helpers/decodeAttestationObject.ts
@@ -0,0 +1,17 @@
+import base64url from 'base64url';
+import cbor from 'cbor';
+
+import { AttestationObject } from '@libTypes';
+
+/**
+ * Convert an AttestationObject from base64 string to a proper object
+ *
+ * @param base64AttestationObject Base64-encoded Attestation Object
+ */
+export default function decodeAttestationObject(
+  base64AttestationObject: string,
+): AttestationObject {
+  const toBuffer = base64url.toBuffer(base64AttestationObject);
+  const toCBOR: AttestationObject = cbor.decodeAllSync(toBuffer)[0];
+  return toCBOR;
+}