1 files changed, 21 insertions, 9 deletions
diff --git a/packages/taler-util/src/helpers.ts b/packages/taler-util/src/helpers.ts
index 089602c9d..d4c3c86b5 100644
--- a/packages/taler-util/src/helpers.ts
+++ b/packages/taler-util/src/helpers.ts
@@ -63,10 +63,7 @@ export function canonicalJson(obj: any): string {
   // Check for cycles, etc.
   obj = JSON.parse(JSON.stringify(obj));
   if (typeof obj === "string") {
-    const s = JSON.stringify(obj);
-    return s.replace(/[\u007F-\uFFFF]/g, function (chr) {
-      return "\\u" + ("0000" + chr.charCodeAt(0).toString(16)).substr(-4);
-    });
+    return JSON.stringify(obj);
   }
   if (typeof obj === "number" || typeof obj === "boolean" || obj === null) {
     return JSON.stringify(obj);
@@ -94,7 +91,7 @@ export function canonicalJson(obj: any): string {
 /**
  * Lexically compare two strings.
  */
-export function strcmp(s1: string, s2: string): number {
+export function strcmp(s1: string, s2: string): -1 | 0 | 1 {
   if (s1 < s2) {
     return -1;
   }
@@ -113,15 +110,30 @@ export function j2s(x: any): string {
 
 /**
  * Use this to filter null or undefined from an array in a type-safe fashion
- * 
+ *
  * example:
  * const array: Array<T | undefined> = [undefined, null]
  * const filtered: Array<T> = array.filter(notEmpty)
- * 
- * @param value 
- * @returns 
+ *
+ * @param value
+ * @returns
  */
 export function notEmpty<T>(value: T | null | undefined): value is T {
   return value !== null && value !== undefined;
 }
 
+/**
+ * Safe function to stringify errors.
+ */
+export function stringifyError(x: any): string {
+  if (typeof x === "undefined") {
+    return "<thrown undefined>";
+  }
+  if (x === null) {
+    return `<thrown null>`;
+  }
+  if (typeof x === "object") {
+    return x.toString();
+  }
+  return `<thrown ${typeof x}>`;
+}