pub fn setup_varint(value: &KvpValue) -> Option<u64>Expand description
Read a varint out of a setup parameter value, whichever shape it arrived in.
This draft frames every setup parameter as {Type, Length, Value}, and the
decoder has no per-key table telling it which values are numbers, so a
parameter that came off the wire always arrives as bytes. A caller that
matches on KvpValue::Varint alone therefore never sees anything a peer
sent - only something this process built itself. Both shapes are read here,
and a value with bytes left over after the varint is refused rather than
truncated.