ForwardCompatibleFactoryKey

Caller-controlled allocator for the opaque bytes a @ForwardCompatible decoder preserves when it skips an unknown sealed variant.

Inject via DecodeContext.with; the generated forward-compatible decode reads context[ForwardCompatibleFactoryKey] ?: BufferFactory.managed(). The default is managed() — GC-lifetime heap bytes that need no manual free. A caller relaying or persisting many frames can supply a pool-backed or native BufferFactory for the preserved payloads and take ownership of freeing them.

val ctx = DecodeContext.Empty.with(ForwardCompatibleFactoryKey, myPool.asFactory())
val op = OpCodec.decode(buffer, ctx)

See also