Mark expired ethflow orders as such (#778)

Calculates the expired status based on the ethflow valid to.

Test Plan
Added unit tests

crates/database/src/orders.rs

@@ -378,6 +378,17 @@ pub struct FullOrder {
     pub surplus_fee_timestamp: Option<DateTime<Utc>>,
 }
 
+impl FullOrder {
+    pub fn valid_to(&self) -> i64 {
+        if let Some((_, valid_to)) = self.ethflow_data {
+            // For ethflow orders, we always return the user valid_to,
+            // as the Eip1271 valid to is u32::max
+            return valid_to;
+        }
+        self.valid_to
+    }
+}
+
 // When querying orders we have several specialized use cases working with their own filtering,
 // ordering, indexes. The parts that are shared between all queries are defined here so they can be
 // reused.

crates/orderbook/src/database/orders.rs

@@ -315,7 +315,7 @@ fn calculate_status(order: &FullOrder) -> OrderStatus {
     if order.invalidated {
         return OrderStatus::Cancelled;
     }
-    if order.valid_to < Utc::now().timestamp() {
+    if order.valid_to() < Utc::now().timestamp() {
         return OrderStatus::Expired;
     }
     if order.presignature_pending {
@@ -629,6 +629,16 @@ mod tests {
             }),
             OrderStatus::Expired
         );
+
+        // Expired - for ethflow orders
+        assert_eq!(
+            calculate_status(&FullOrder {
+                invalidated: false,
+                ethflow_data: Some((false, valid_to_yesterday.timestamp())),
+                ..order_row()
+            }),
+            OrderStatus::Expired
+        );
     }
 
     #[tokio::test]