lib.rs

	}
}

/// Filter for `Location` to find those which represent a voice of an identified plurality.
///
/// May reasonably be used with `EnsureXcm`.
pub struct IsVoiceOfBody<Prefix, Body>(PhantomData<(Prefix, Body)>);
impl<Prefix: Get<Location>, Body: Get<BodyId>> Contains<Location> for IsVoiceOfBody<Prefix, Body> {
	fn contains(l: &Location) -> bool {
		let maybe_suffix = l.match_and_split(&Prefix::get());
		matches!(maybe_suffix, Some(Plurality { id, part }) if id == &Body::get() && part == &BodyPart::Voice)
	}
}

/// `EnsureOrigin` implementation succeeding with a `Location` value to recognize and filter
/// the `Origin::Xcm` item.
pub struct EnsureXcm<F, L = Location>(PhantomData<(F, L)>);
impl<
		O: OriginTrait + From<Origin>,
		F: Contains<L>,
		L: TryFrom<Location> + TryInto<Location> + Clone,
	> EnsureOrigin<O> for EnsureXcm<F, L>
where
	O::PalletsOrigin: From<Origin> + TryInto<Origin, Error = O::PalletsOrigin>,
{
	type Success = L;

	fn try_origin(outer: O) -> Result<Self::Success, O> {
		outer.try_with_caller(|caller| {
			caller.try_into().and_then(|o| match o {
				Origin::Xcm(ref location)
					if F::contains(&location.clone().try_into().map_err(|_| o.clone().into())?) =>
					Ok(location.clone().try_into().map_err(|_| o.clone().into())?),
				Origin::Xcm(location) => Err(Origin::Xcm(location).into()),
				o => Err(o.into()),
			})
		})
	}

	#[cfg(feature = "runtime-benchmarks")]
	fn try_successful_origin() -> Result<O, ()> {
		Ok(O::from(Origin::Xcm(Here.into())))
	}
}

/// `EnsureOrigin` implementation succeeding with a `Location` value to recognize and filter
/// the `Origin::Response` item.
pub struct EnsureResponse<F>(PhantomData<F>);
impl<O: OriginTrait + From<Origin>, F: Contains<Location>> EnsureOrigin<O> for EnsureResponse<F>
where
	O::PalletsOrigin: From<Origin> + TryInto<Origin, Error = O::PalletsOrigin>,
{
	type Success = Location;

	fn try_origin(outer: O) -> Result<Self::Success, O> {
		outer.try_with_caller(|caller| {
			caller.try_into().and_then(|o| match o {
				Origin::Response(responder) => Ok(responder),
				o => Err(o.into()),
			})
		})
	}

	#[cfg(feature = "runtime-benchmarks")]
	fn try_successful_origin() -> Result<O, ()> {
		Ok(O::from(Origin::Response(Here.into())))
	}
}

/// A simple passthrough where we reuse the `Location`-typed XCM origin as the inner value of
/// this crate's `Origin::Xcm` value.
pub struct XcmPassthrough<RuntimeOrigin>(PhantomData<RuntimeOrigin>);
impl<RuntimeOrigin: From<crate::Origin>> ConvertOrigin<RuntimeOrigin>
	for XcmPassthrough<RuntimeOrigin>
{
	fn convert_origin(
		origin: impl Into<Location>,
		kind: OriginKind,
	) -> Result<RuntimeOrigin, Location> {
		let origin = origin.into();
		match kind {
			OriginKind::Xcm => Ok(crate::Origin::Xcm(origin).into()),
			_ => Err(origin),
		}
	}
}