1 files changed, 10 insertions, 0 deletions
diff --git a/packages/taler-util/src/time.ts b/packages/taler-util/src/time.ts
index 1e79b943b..c3f1b30bd 100644
--- a/packages/taler-util/src/time.ts
+++ b/packages/taler-util/src/time.ts
@@ -56,6 +56,16 @@ export namespace TalerProtocolTimestamp {
       t_s: s,
     };
   }
+  export function min(t1: TalerProtocolTimestamp, t2: TalerProtocolTimestamp): TalerProtocolTimestamp {
+    if (t1.t_s === "never") {
+      return { t_s: t2.t_s };
+    }
+    if (t2.t_s === "never") {
+      return { t_s: t2.t_s };
+    }
+    return { t_s: Math.min(t1.t_s, t2.t_s) };
+  }
+
 }
 
 export interface Duration {