fixes

src/edwards.rs

@@ -156,6 +156,7 @@ where
     }
 
     fn double(&self) -> Self {
+        /*
         let a = self.x.add_mod(&self.y, &self.curve.p);
         let b = a.mul_mod(&a, &self.curve.p);
         let c = self.x.mul_mod(&self.x, &self.curve.p);
@@ -174,6 +175,9 @@ where
             z,
             curve: self.curve,
         }
+         */
+
+        self.add(self, self)
     }
 
     fn mul(&self, x: &N) -> Self {
@@ -200,7 +204,7 @@ where
         + ConstZero
         + crypto_bigint::subtle::ConstantTimeEq,
 {
-    fn get_y(self) -> N {
+    pub fn get_y(self) -> N {
         self.y
             .mul_mod(&self.z.inv_mod(&self.curve.p).unwrap(), &self.curve.p)
     }

src/lib.rs

@@ -75,9 +75,6 @@ impl From<U256> for Secret {
 #[cfg(test)]
 mod tests {
     use super::*;
-    const BIG_VALID_VALUE: U256 = U256::ONE
-        .shl(251)
-        .add_mod(&U256::from_u64(1232039487203 * 8), &CURVE_25519.p);
 
     #[test]
     fn public_key_derivation() {

src/montgomery.rs

@@ -1,9 +1,8 @@
 use crate::traits::{Curve, Point};
-use crypto_bigint::subtle::{Choice, ConstantTimeEq};
-use crypto_bigint::{AddMod, ConstChoice, Encoding, NonZero, SubMod, U256};
+use crypto_bigint::{AddMod, Encoding, NonZero, SubMod, U256};
 use crypto_bigint::{Integer, InvMod, MulMod};
 use std::fmt::{Display, Formatter};
-use std::ops::{Add, Div, Mul};
+use std::ops::{Div, Mul};
 
 /// A curve of the form `By^2 = x^3 + Ax^2 + x`
 #[derive(Clone, Copy, Debug)]

src/traits.rs

@@ -1,4 +1,4 @@
-use crypto_bigint::{AddMod, InvMod, MulMod, SubMod, U256};
+use crypto_bigint::{AddMod, InvMod, MulMod, SubMod};
 
 pub trait Curve<T, N>
 where