derive Debug for various structs

sapling-crypto/src/jubjub/edwards.rs

@@ -25,6 +25,7 @@ use std::io::{
 //
 // See "Twisted Edwards Curves Revisited"
 //     Huseyin Hisil, Kenneth Koon-Ho Wong, Gary Carter, and Ed Dawson
+#[derive(Debug)]
 pub struct Point<E: JubjubEngine, Subgroup> {
     x: E::Fr,
     y: E::Fr,

sapling-crypto/src/jubjub/mod.rs

@@ -43,6 +43,7 @@ pub mod fs;
 pub mod tests;
 
 /// Point of unknown order.
+#[derive(Debug)]
 pub enum Unknown { }
 
 /// Point of prime order.

sapling-crypto/src/redjubjub.rs

@@ -29,7 +29,7 @@ fn h_star<E: JubjubEngine>(a: &[u8], b: &[u8]) -> E::Fs {
     hash_to_scalar::<E>(b"Zcash_RedJubjubH", a, b)
 }
 
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub struct Signature {
     rbar: [u8; 32],
     sbar: [u8; 32],
@@ -37,6 +37,7 @@ pub struct Signature {
 
 pub struct PrivateKey<E: JubjubEngine>(pub E::Fs);
 
+#[derive(Debug)]
 pub struct PublicKey<E: JubjubEngine>(pub Point<E, Unknown>);
 
 impl Signature {