feat: implement topup functionality with create, get, and cancel operations ✨

lib/backend-types.ts

@@ -57,6 +57,20 @@ export interface ApiError {
 	detail?: string;
 }
 
+export interface Topup {
+	id: string;
+	amount: number;
+	user: Pick<User, "id" | "id_card" | "mobile"> & {
+		name: string;
+	};
+	paid: boolean;
+	mib_reference: string | null;
+	expires_at: string;
+	is_expired: boolean;
+	created_at: string;
+	updated_at: string;
+}
+
 export interface Payment {
 	id: string;
 	devices: Device[];