1 files changed, 21 insertions, 15 deletions
diff --git a/packages/merchant-backoffice-ui/src/paths/instance/templates/create/CreatePage.tsx b/packages/merchant-backoffice-ui/src/paths/instance/templates/create/CreatePage.tsx
index 78d7c83ac..50262be17 100644
--- a/packages/merchant-backoffice-ui/src/paths/instance/templates/create/CreatePage.tsx
+++ b/packages/merchant-backoffice-ui/src/paths/instance/templates/create/CreatePage.tsx
@@ -70,7 +70,7 @@ interface Props {
 export function CreatePage({ onCreate, onBack }: Props): VNode {
   const { i18n } = useTranslationContext();
   const { config } = useSessionContext();
-  const {state:session} = useSessionContext();
+  const { state: session } = useSessionContext();
   const devices = useInstanceOtpDevices();
 
   const [state, setState] = useState<Partial<Entity>>({
@@ -100,11 +100,11 @@ export function CreatePage({ onCreate, onBack }: Props): VNode {
         : undefined,
     description: !state.description ? i18n.str`should not be empty` : undefined,
     amount: !state.amount
-      ? undefined
+      ? state.amount_editable ? undefined : i18n.str`required`
       : !parsedPrice
         ? i18n.str`not valid`
         : Amounts.isZero(parsedPrice)
-          ? i18n.str`must be greater than 0`
+          ? state.amount_editable ? undefined : i18n.str`must be greater than 0`
           : undefined,
     minimum_age:
       state.minimum_age && state.minimum_age < 0
@@ -125,24 +125,30 @@ export function CreatePage({ onCreate, onBack }: Props): VNode {
     (k) => (errors as Record<string, unknown>)[k] !== undefined,
   );
 
+  const zero = Amounts.stringify(Amounts.zeroOfCurrency(config.currency))
+
   const submitForm = () => {
     if (hasErrors) return Promise.reject();
+    const contract_amount = state.amount_editable ? undefined : state.amount as AmountString
+    const contract_summary = state.summary_editable ? undefined : state.summary
+    const template_contract: TalerMerchantApi.TemplateContractDetails = {
+      minimum_age: state.minimum_age!,
+      pay_duration: Duration.toTalerProtocolDuration(state.pay_duration!),
+      amount: contract_amount,
+      summary: contract_summary,
+      currency:
+        cList.length > 1 && state.currency_editable
+          ? undefined
+          : config.currency,
+    }
     return onCreate({
       template_id: state.id!,
       template_description: state.description!,
-      template_contract: {
-        minimum_age: state.minimum_age!,
-        pay_duration: Duration.toTalerProtocolDuration(state.pay_duration!),
-        amount: state.amount_editable ? undefined : state.amount,
-        summary: state.summary_editable ? undefined : state.summary,
-        currency:
-          cList.length > 1 && state.currency_editable
-            ? undefined
-            : config.currency,
-      },
+      template_contract,
+      required_currency: contract_amount !== undefined ? undefined : config.currency,
       editable_defaults: {
-        amount: !state.amount_editable ? undefined : state.amount,
-        summary: !state.summary_editable ? undefined : state.summary,
+        amount: !state.amount_editable ? undefined : (state.amount ?? zero),
+        summary: !state.summary_editable ? undefined : (state.summary ?? ""),
         currency:
           cList.length === 1 || !state.currency_editable
             ? undefined