add more debug information on errors caught from server

src/libs/endorserServer.ts

@@ -594,6 +594,31 @@ const planCache: LRUCache<string, PlanSummaryRecord> = new LRUCache({
   max: 500,
 });
 
+/**
+ * Helpful for server errors, to get all the info -- including stuff skipped by toString & JSON.stringify
+ *
+ * @param error
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function errorStringForLog(error: any) {
+  let fullError = "" + error + " - JSON: " + JSON.stringify(error);
+  const errorResponseText = JSON.stringify(error.response);
+  // for some reason, error.response is not included in stringify result (eg. for 400 errors on invite redemptions)
+  if (!R.empty(errorResponseText) && !fullError.includes(errorResponseText)) {
+    // add error.response stuff
+    if (R.equals(error?.config, error?.response?.config)) {
+      // but exclude "config" because it's already in there
+      const newErrorResponseText = JSON.stringify(
+        R.omit(["config"] as never[], error.response),
+      );
+      fullError += " - .response w/o same config JSON: " + newErrorResponseText;
+    } else {
+      fullError += " - .response JSON: " + errorResponseText;
+    }
+  }
+  return fullError;
+}
+
 /**
  * @param handleId nullable, in which case "undefined" will be returned
  * @param requesterDid optional, in which case no private info will be returned