Add some functionalities for MuxChip

halo2_gadgets/src/ecc/chip.rs

@@ -48,7 +48,7 @@ impl EccPoint {
     /// Constructs a point from its coordinates, without checking they are on the curve.
     ///
     /// This is an internal API that we only use where we know we have a valid curve point.
-    pub(crate) fn from_coordinates_unchecked(
+    pub fn from_coordinates_unchecked(
         x: AssignedCell<Assigned<pallas::Base>, pallas::Base>,
         y: AssignedCell<Assigned<pallas::Base>, pallas::Base>,
     ) -> Self {

halo2_proofs/src/circuit.rs

@@ -139,6 +139,16 @@ impl<F: Field> AssignedCell<Assigned<F>, F> {
     }
 }
 
+impl<F: Field> From<AssignedCell<F, F>> for AssignedCell<Assigned<F>, F> {
+    fn from(ac: AssignedCell<F, F>) -> Self {
+        AssignedCell {
+            value: ac.value.map(|a| a.into()),
+            cell: ac.cell,
+            _marker: Default::default(),
+        }
+    }
+}
+
 impl<V: Clone, F: Field> AssignedCell<V, F>
 where
     for<'v> Assigned<F>: From<&'v V>,