fixes

src/field/field_types.rs

@@ -93,10 +93,6 @@ pub trait Field:
         self.square() * *self
     }
 
-    fn double(&self) -> Self {
-        *self * Self::TWO
-    }
-
     fn triple(&self) -> Self {
         *self * (Self::ONE + Self::TWO)
     }

src/gadgets/curve.rs

@@ -1,18 +1,18 @@
 use crate::curve::curve_types::{AffinePoint, Curve};
 use crate::field::extension_field::Extendable;
 use crate::field::field_types::{Field, RichField};
-use crate::gadgets::nonnative::ForeignFieldTarget;
+use crate::gadgets::nonnative::NonNativeTarget;
 use crate::plonk::circuit_builder::CircuitBuilder;
 
 /// A Target representing an affine point on the curve `C`.
 #[derive(Clone, Debug)]
 pub struct AffinePointTarget<C: Curve> {
-    pub x: ForeignFieldTarget<C::BaseField>,
+    pub x: NonNativeTarget<C::BaseField>,
-    pub y: ForeignFieldTarget<C::BaseField>,
+    pub y: NonNativeTarget<C::BaseField>,
 }
 
 impl<C: Curve> AffinePointTarget<C> {
-    pub fn to_vec(&self) -> Vec<ForeignFieldTarget<C::BaseField>> {
+    pub fn to_vec(&self) -> Vec<NonNativeTarget<C::BaseField>> {
         vec![self.x.clone(), self.y.clone()]
     }
 }
@@ -130,8 +130,8 @@ mod tests {
 
     use crate::curve::curve_types::{AffinePoint, Curve};
     use crate::curve::secp256k1::Secp256K1;
-    use crate::field::crandall_field::CrandallField;
     use crate::field::field_types::Field;
+    use crate::field::goldilocks_field::GoldilocksField;
     use crate::field::secp256k1_base::Secp256K1Base;
     use crate::iop::witness::PartialWitness;
     use crate::plonk::circuit_builder::CircuitBuilder;
@@ -140,7 +140,7 @@ mod tests {
 
     #[test]
     fn test_curve_point_is_valid() -> Result<()> {
-        type F = CrandallField;
+        type F = GoldilocksField;
         const D: usize = 4;
 
         let config = CircuitConfig::large_config();
@@ -164,7 +164,7 @@ mod tests {
     #[test]
     #[should_panic]
     fn test_curve_point_is_not_valid() {
-        type F = CrandallField;
+        type F = GoldilocksField;
         const D: usize = 4;
 
         let config = CircuitConfig::large_config();
@@ -190,7 +190,7 @@ mod tests {
 
     #[test]
     fn test_curve_double() -> Result<()> {
-        type F = CrandallField;
+        type F = GoldilocksField;
         const D: usize = 4;
 
         let config = CircuitConfig::large_config();

src/gadgets/nonnative.rs

@@ -10,8 +10,9 @@ use crate::iop::target::Target;
 use crate::iop::witness::{PartitionWitness, Witness};
 use crate::plonk::circuit_builder::CircuitBuilder;
 
+#[derive(Clone, Debug)]
 pub struct NonNativeTarget<FF: Field> {
-    value: BigUintTarget,
+    pub(crate) value: BigUintTarget,
     _phantom: PhantomData<FF>,
 }
 
@@ -107,8 +108,8 @@ impl<F: RichField + Extendable<D>, const D: usize> CircuitBuilder<F, D> {
         inv
     }
 
-    /// Returns `x % |FF|` as a `ForeignFieldTarget`.
+    /// Returns `x % |FF|` as a `NonNativeTarget`.
-    fn reduce<FF: Field>(&mut self, x: &BigUintTarget) -> ForeignFieldTarget<FF> {
+    fn reduce<FF: Field>(&mut self, x: &BigUintTarget) -> NonNativeTarget<FF> {
         let modulus = FF::order();
         let order_target = self.constant_biguint(&modulus);
         let value = self.rem_biguint(x, &order_target);
@@ -131,8 +132,8 @@ impl<F: RichField + Extendable<D>, const D: usize> CircuitBuilder<F, D> {
 
 #[derive(Debug)]
 struct NonNativeInverseGenerator<F: RichField + Extendable<D>, const D: usize, FF: Field> {
-    x: ForeignFieldTarget<FF>,
+    x: NonNativeTarget<FF>,
-    inv: ForeignFieldTarget<FF>,
+    inv: NonNativeTarget<FF>,
     _phantom: PhantomData<F>,
 }
 

src/iop/generator.rs

@@ -8,7 +8,7 @@ use crate::field::extension_field::{Extendable, FieldExtension};
 use crate::field::field_types::{Field, RichField};
 use crate::gadgets::arithmetic_u32::U32Target;
 use crate::gadgets::biguint::BigUintTarget;
-use crate::gadgets::nonnative::ForeignFieldTarget;
+use crate::gadgets::nonnative::NonNativeTarget;
 use crate::hash::hash_types::{HashOut, HashOutTarget};
 use crate::iop::target::Target;
 use crate::iop::wire::Wire;
@@ -169,7 +169,7 @@ impl<F: Field> GeneratedValues<F> {
         }
     }
 
-    pub fn set_nonnative_target<FF: Field>(&mut self, target: ForeignFieldTarget<FF>, value: FF) {
+    pub fn set_nonnative_target<FF: Field>(&mut self, target: NonNativeTarget<FF>, value: FF) {
         self.set_biguint_target(target.value, value.to_biguint())
     }
 

src/iop/witness.rs

@@ -6,7 +6,7 @@ use crate::field::extension_field::target::ExtensionTarget;
 use crate::field::extension_field::{Extendable, FieldExtension};
 use crate::field::field_types::Field;
 use crate::gadgets::biguint::BigUintTarget;
-use crate::gadgets::nonnative::ForeignFieldTarget;
+use crate::gadgets::nonnative::NonNativeTarget;
 use crate::hash::hash_types::HashOutTarget;
 use crate::hash::hash_types::{HashOut, MerkleCapTarget};
 use crate::hash::merkle_tree::MerkleCap;
@@ -69,7 +69,7 @@ pub trait Witness<F: Field> {
         result
     }
 
-    fn get_nonnative_target<FF: Field>(&self, target: ForeignFieldTarget<FF>) -> FF {
+    fn get_nonnative_target<FF: Field>(&self, target: NonNativeTarget<FF>) -> FF {
         let val = self.get_biguint_target(target.value);
         FF::from_biguint(val)
     }