feat(store): add SetWhitelistEnabled

internal/store/whitelist.go

@@ -86,3 +86,18 @@ func (s *Store) ListWhitelist(account string, dir Direction) ([]string, error) {
 	}
 	return out, rows.Err()
 }
+
+// SetWhitelistEnabled toggles one account's per-direction whitelist-enabled
+// flag, leaving the address list and all other fields untouched.
+func (s *Store) SetWhitelistEnabled(account string, dir Direction, enabled bool) error {
+	col := "whitelist_in_enabled"
+	if dir == DirOut {
+		col = "whitelist_out_enabled"
+	}
+	id, err := s.accountID(account)
+	if err != nil {
+		return err
+	}
+	_, err = s.db.Exec(fmt.Sprintf("UPDATE accounts SET %s=? WHERE id=?", col), b2i(enabled), id)
+	return err
+}