fn from(t: T) -> RequiredWrapper<T> { RequiredWrapper(Some(t)) }
}
+/// Wrapper to read a required (non-optional) TLV record that may have been upgraded without
+/// backwards compat.
+pub struct UpgradableRequired<T: MaybeReadable>(pub Option<T>);
+impl<T: MaybeReadable> MaybeReadable for UpgradableRequired<T> {
+ #[inline]
+ fn read<R: Read>(reader: &mut R) -> Result<Option<Self>, DecodeError> {
+ let tlv = MaybeReadable::read(reader)?;
+ if let Some(tlv) = tlv { return Ok(Some(Self(Some(tlv)))) }
+ Ok(None)
+ }
+}
+
pub(crate) struct U48(pub u64);
impl Writeable for U48 {
#[inline]