pub fn parse_envelope(buf: &[u8]) -> Result<(&[u8], &[u8]), String>Expand description
Helper exposed for tests / plugin authors: parse the envelope shape
[state_len: u32 LE][state_bytes][ipc_stream_bytes].
Returns (state, ipc). The plugin uses the equivalent of this on
its side to recover state + values per update/merge call.
ยงErrors
Returns a string error if the buffer is shorter than 4 bytes or the declared state length overruns the buffer.