diff --git a/typescript/types/bangle_extensions.d.ts b/typescript/types/bangle_extensions.d.ts
new file mode 100644
index 000000000..e5d94d079
--- /dev/null
+++ b/typescript/types/bangle_extensions.d.ts
@@ -0,0 +1,10 @@
+type BangleHandler<T extends (...args: any[]) => any> = T | (T | undefined)[];
+
+type BangleEvents = {
+  ["#ontap"]?: BangleHandler<(data: { dir: "left" | "right" | "top" | "bottom" | "front" | "back", double: boolean, x: TapAxis, y: TapAxis, z: TapAxis }) => void>,
+  ["#ongesture"]?: BangleHandler<(xyz: Int8Array) => void>,
+  ["#onswipe"]?: BangleHandler<SwipeCallback>,
+  ["#ontouch"]?: BangleHandler<TouchCallback>,
+  ["#ondrag"]?: BangleHandler<DragCallback>,
+  ["#onstroke"]?: BangleHandler<(event: { xy: Uint8Array, stroke?: string }) => void>,
+};