diff --git a/include/ircd/js/trap.h b/include/ircd/js/trap.h
index 9fcae47dc..185706d6a 100644
--- a/include/ircd/js/trap.h
+++ b/include/ircd/js/trap.h
@@ -36,15 +36,15 @@ class trap
 	std::map<persist_string, trap *, persist_string::less> children;
 
 	// Override these to define JS objects in C
-	virtual value on_call(object::handle, const args &);
+	virtual value on_call(object::handle, object::handle, const args &);
 	virtual value on_set(object::handle, id::handle, value::handle);
 	virtual value on_get(object::handle, id::handle, value::handle);
 	virtual void on_add(object::handle, id::handle, value::handle);
 	virtual bool on_del(object::handle, id::handle);
 	virtual bool on_has(object::handle, id::handle);
 	virtual void on_enu(object::handle);
-	virtual void on_ctor(object &, const args &);
-	virtual void on_dtor(JSObject &);
+	virtual void on_new(object::handle, object &, const args &);
+	virtual void on_gc(JSObject &);
 
   private:
 	void host_exception(const char *fmt, ...) const AFP(2, 3);
diff --git a/include/ircd/js/trap_function.h b/include/ircd/js/trap_function.h
index 884391fa6..7cef5b075 100644
--- a/include/ircd/js/trap_function.h
+++ b/include/ircd/js/trap_function.h
@@ -32,7 +32,7 @@ struct trap_function
 	uint flags;
 
   protected:
-	virtual value on_call(object::handle, const args &);
+	virtual value on_call(object::handle callee, value::handle that, const args &);
 
   private:
 	static trap_function &from(JSObject *const &);
diff --git a/ircd/js.cc b/ircd/js.cc
index 9cb983567..2777d7af9 100644
--- a/ircd/js.cc
+++ b/ircd/js.cc
@@ -427,14 +427,14 @@ noexcept try
 	assert(&our(c) == cx);
 
 	const struct args args(argc, argv);
-	//const auto that(args.computeThis(c));
+	const value that(args.computeThis(c));
 	const object func(args.callee());
 	auto &trap(from(func));
 	log.debug("trap_function(%p) \"%s\": call",
 	          (const void *)&trap,
 	          trap.name.c_str());
 
-	args.rval().set(trap.on_call(func, args));
+	args.rval().set(trap.on_call(func, that, args));
 	return true;
 }
 catch(const jserror &e)
@@ -469,6 +469,7 @@ ircd::js::trap_function::from(JSObject *const &func)
 
 ircd::js::value
 ircd::js::trap_function::on_call(object::handle,
+                                 value::handle,
                                  const args &)
 {
 	return {};
@@ -676,7 +677,7 @@ noexcept try
 
 	auto &trap(from(*obj));
 	trap.debug("dtor %p", (const void *)obj);
-	trap.on_dtor(*obj);
+	trap.on_gc(*obj);
 }
 catch(const jserror &e)
 {
@@ -706,7 +707,7 @@ noexcept try
 	trap.debug("ctor: '%s'", trap.name().c_str());
 
 	object ret(JS_NewObjectWithGivenProto(*cx, &trap.jsclass(), that));
-	trap.on_ctor(ret, args);
+	trap.on_new(that, ret, args);
 	args.rval().set(ret);
 	return true;
 }
@@ -742,7 +743,7 @@ noexcept try
 	trap_that.debug("call: '%s'", trap_func.name().c_str());
 	trap_func.debug("call");
 
-	args.rval().set(trap_func.on_call(func, args));
+	args.rval().set(trap_func.on_call(func, that, args));
 	return true;
 }
 catch(const jserror &e)
@@ -1048,13 +1049,14 @@ const
 }
 
 void
-ircd::js::trap::on_dtor(JSObject &)
+ircd::js::trap::on_gc(JSObject &)
 {
 }
 
 void
-ircd::js::trap::on_ctor(object &obj,
-                        const args &)
+ircd::js::trap::on_new(object::handle,
+                       object &,
+                       const args &)
 {
 }
 
@@ -1067,7 +1069,7 @@ bool
 ircd::js::trap::on_has(object::handle,
                        id::handle)
 {
-	return true;
+	return false;
 }
 
 bool
@@ -1108,6 +1110,7 @@ ircd::js::trap::on_set(object::handle,
 
 ircd::js::value
 ircd::js::trap::on_call(object::handle,
+                        object::handle,
                         const args &)
 {
 	return {};
diff --git a/modules/future.cc b/modules/future.cc
index 16cd4aa7a..d37d08318 100644
--- a/modules/future.cc
+++ b/modules/future.cc
@@ -29,7 +29,7 @@ struct future
 {
 	uint64_t id_ctr;
 
-	void on_ctor(object &, const args &args) override;
+	void on_new(object::handle, object &, const args &args) override;
 
 	future();
 }
@@ -46,7 +46,7 @@ future::future()
 }
 
 void
-future::on_ctor(object &obj, const args &args)
+future::on_new(object::handle, object &obj, const args &args)
 {
 	auto &task(task::get());