feat: read a contact's acceptance state

core/src/store.rs

@@ -453,6 +453,17 @@ impl Store {
         Ok(changed > 0)
     }
 
+    /// The acceptance state of an address, if it was ever accepted:
+    /// Some(true) main tier, Some(false) blocked, None never.
+    pub fn accepted_state(&self, address: &str) -> Result<Option<bool>, Error> {
+        Ok(self
+            .one::<i64>(
+                "SELECT active FROM accepted WHERE address = ?1",
+                &[&address],
+            )?
+            .map(|active| active != 0))
+    }
+
     /// The identity frozen at acceptance, if this address is currently
     /// accepted; the token for our own mailbox travels in the next message.
     pub fn accepted_identity(&self, address: &str) -> Result<Option<[u8; KEY_LEN]>, Error> {