Interop Promise - ETS/JS Cross-Language Promise Bridging

Guide for understanding, developing, and debugging the Promise interop system that bridges ETS (ArkTS) Promises with JavaScript Promises in the ArkCompiler hybrid runtime.

Architecture Overview

The interop Promise system enables transparent bidirectional Promise conversion between the static ETS VM and dynamic JS VM. When ETS calls a JS async function (or vice versa), the system creates proxy objects and registers callbacks so that resolve/reject events propagate correctly across the language boundary.