diff --git a/evdokia.lua b/evdokia.lua
new file mode 100644
index 0000000..bb54c30
--- /dev/null
+++ b/evdokia.lua
@@ -0,0 +1,18 @@
+local signature_space = 0
+local alias_space = 2
+
+function get_dkim_for_domain(domain_name)
+    local original_domain_name = domain_name
+
+    local alias = box.select(alias_space, 0, domain_name)
+    if alias then
+        domain_name = alias[1]
+    end
+
+    local signature_data = box.select(signature_space, 0, domain_name)
+    if signature_data then
+        return box.tuple.new({original_domain_name, signature_data[1], signature_data[2]})
+    end
+
+    return box.tuple.new({"", "", ""})
+end