local error impl: errors shown fixed position that are wiped when moved from the view

1 files changed, 20 insertions, 1 deletions

diff --git a/packages/taler-util/src/amounts.ts b/packages/taler-util/src/amounts.ts
index 082a8168e..5c6444b00 100644
--- a/packages/taler-util/src/amounts.ts
+++ b/packages/taler-util/src/amounts.ts
@@ -26,6 +26,9 @@ import {
   codecForString,
   codecForNumber,
   Codec,
+  Context,
+  DecodingError,
+  renderContext,
 } from "./codec.js";
 import { AmountString } from "./taler-types.js";
 
@@ -74,7 +77,23 @@ export const codecForAmountJson = (): Codec<AmountJson> =>
     .property("fraction", codecForNumber())
     .build("AmountJson");
 
-export const codecForAmountString = (): Codec<AmountString> => codecForString() as Codec<AmountString>;
+export function codecForAmountString(): Codec<AmountString> {
+  return {
+    decode(x: any, c?: Context): AmountString {
+      if (typeof x !== "string") {
+        throw new DecodingError(
+          `expected string at ${renderContext(c)} but got ${typeof x}`,
+        );
+      }
+      if (Amounts.parse(x) === undefined) {
+        throw new DecodingError(
+          `invalid amount at ${renderContext(c)} got "${x}"`,
+        );
+      }
+      return x as AmountString;
+    },
+  };
+}
 
 /**
  * Result of a possibly overflowing operation.