diff --git a/types.go b/types.go
new file mode 100644
index 0000000..2d4d70e
--- /dev/null
+++ b/types.go
@@ -0,0 +1,21 @@
+package main
+
+import "time"
+
+type Event struct {
+	Seq       int
+	Type      string
+	Hash      string
+	ItemID    string
+	EventID   string
+	Data      map[string]interface{}
+	Timestamp time.Time
+}
+
+type SLItem struct {
+	ID        string
+	Content   string
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	DeletedAt time.Time
+}