2 files changed, 24 insertions, 7 deletions
diff --git a/packages/browser/src/helpers/identifyRegistrationError.ts b/packages/browser/src/helpers/identifyRegistrationError.ts
index 4779f1a..8da0c97 100644
--- a/packages/browser/src/helpers/identifyRegistrationError.ts
+++ b/packages/browser/src/helpers/identifyRegistrationError.ts
@@ -1,4 +1,5 @@
 import { isValidDomain } from './isValidDomain';
+import { WebAuthnError } from './structs';
 
 export function identifyRegistrationError({ error, options }: {
   error: Error,
@@ -73,10 +74,3 @@ export function identifyRegistrationError({ error, options }: {
 
   return error;
 }
-
-class WebAuthnError extends Error {
-  constructor(message: string) {
-    super(message);
-    this.name = 'WebAuthnError';
-  }
-}
diff --git a/packages/browser/src/helpers/structs.ts b/packages/browser/src/helpers/structs.ts
new file mode 100644
index 0000000..66b6d63
--- /dev/null
+++ b/packages/browser/src/helpers/structs.ts
@@ -0,0 +1,23 @@
+/**
+ * A custom Error used to return a more nuanced error detailing _why_ one of the eight documented
+ * errors in the spec was raised after calling `navigator.credentials.create()` or
+ * `navigator.credentials.get()`:
+ *
+ * - `AbortError`
+ * - `ConstraintError`
+ * - `InvalidStateError`
+ * - `NotAllowedError`
+ * - `NotSupportedError`
+ * - `SecurityError`
+ * - `TypeError`
+ * - `UnknownError`
+ *
+ * Error messages were determined through investigation of the spec to determine under which
+ * scenarios a given error would be raised.
+ */
+export class WebAuthnError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'WebAuthnError';
+  }
+}