Added null cheque

api/fiscal.go

@@ -8,10 +8,16 @@ import (
 )
 
 func (c *Client) executeRequest(ctx context.Context, request FiscalRequest, response interface{}) error {
+	//execute request with json body in request
+	reqJson, err := json.Marshal(request)
+	if err != nil {
+		return fmt.Errorf("failed to marshal request: %w", err)
+	}
+
 	resp, err := c.resty.R().
 		SetContext(ctx).
 		SetHeader("Authorization", c.token).
-		SetBody(request).
+		SetBody(reqJson).
 		Post(c.apiBaseURL + "/fiscal/execute")
 
 	if err != nil {

vchasno.go

@@ -247,11 +247,12 @@ func (c *Client) Sell(ctx context.Context, params SellParams) (*api.SellResponse
 	}
 
 	return c.api.Sell(ctx, api.SellParams{
-		Cashier:  c.cashier,
-		Source:   c.source,
-		Rows:     []api.ReceiptRow{row},
-		Pays:     []api.ReceiptPay{pay},
-		Userinfo: params.Userinfo,
+		Cashier:   c.cashier,
+		Source:    c.source,
+		Rows:      []api.ReceiptRow{row},
+		Pays:      []api.ReceiptPay{pay},
+		Userinfo:  params.Userinfo,
+		CommentUP: params.CommentUP,
 	})
 }
 
@@ -273,3 +274,23 @@ func (c *Client) QuickSellNamed(ctx context.Context, name string, price float64)
 		Price: price,
 	})
 }
+
+func (c *Client) ZeroReceipt(ctx context.Context) (*api.SellResponse, error) {
+	return c.api.Sell(ctx, api.SellParams{
+		Cashier:   c.cashier,
+		Source:    c.source,
+		Rows:      []api.ReceiptRow{},
+		Pays:      []api.ReceiptPay{},
+		CommentUP: "Нульовий чек",
+	})
+}
+
+func (c *Client) ZeroReceiptWithTimeout(timeout time.Duration) (*api.SellResponse, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+	return c.ZeroReceipt(ctx)
+}
+
+func (c *Client) ZeroReceiptDefault() (*api.SellResponse, error) {
+	return c.ZeroReceiptWithTimeout(c.defaults.DefaultTimeout)
+}