1 files changed, 13 insertions, 2 deletions
diff --git a/packages/taler-util/src/codec.ts b/packages/taler-util/src/codec.ts
index 678c3f092..54d450d82 100644
--- a/packages/taler-util/src/codec.ts
+++ b/packages/taler-util/src/codec.ts
@@ -491,6 +491,19 @@ export function codecOptional<V>(innerCodec: Codec<V>): Codec<V | undefined> {
   };
 }
 
+export function codecForLazy<V>(innerCodec: () => Codec<V>): Codec<V> {
+  let instance: Codec<V> | undefined = undefined
+  return {
+    decode(x: any, c?: Context): V {
+      if (instance === undefined) {
+        instance = innerCodec()
+      }
+      return instance.decode(x, c);
+    },
+  };
+}
+
+
 export type CodecType<T> = T extends Codec<infer X> ? X : any;
 
 export function codecForEither<T extends Array<Codec<unknown>>>(
@@ -514,5 +527,3 @@ export function codecForEither<T extends Array<Codec<unknown>>>(
     },
   };
 }
-
-const x = codecForEither(codecForString(), codecForNumber());