Update the ed25519 traits crate

Cargo.toml

@@ -31,7 +31,7 @@ getrandom = { version = "0.2", optional = true }
 
 [dependencies]
 ct-codecs = { version = "1.1", optional = true }
-ed25519 = { version = "1.5", optional = true }
+ed25519 = { version = "2.2", optional = true }
 
 [target.'cfg(all(any(target_arch = "wasm32", target_arch = "wasm64"), target_os = "unknown"))'.dev-dependencies]
 getrandom = { version = "0.2", features = ["js"] }

src/ed25519.rs

@@ -1,5 +1,6 @@
 use core::fmt;
 use core::ops::{Deref, DerefMut};
+use std::convert::TryFrom;
 
 use super::common::*;
 #[cfg(feature = "blind-keys")]
@@ -141,6 +142,14 @@ impl fmt::Debug for Signature {
     }
 }
 
+impl TryFrom<&[u8]> for Signature {
+    type Error = Error;
+
+    fn try_from(slice: &[u8]) -> Result<Self, Self::Error> {
+        Signature::from_slice(slice)
+    }
+}
+
 impl AsRef<[u8]> for Signature {
     fn as_ref(&self) -> &[u8] {
         &self.0
@@ -527,12 +536,8 @@ mod ed25519_trait {
 
     use super::{PublicKey, SecretKey, Signature};
 
-    impl ed25519_trait::Signature for Signature {
-        fn from_bytes(bytes: &[u8]) -> Result<Self, ed25519_trait::Error> {
-            let mut bytes_ = [0u8; Signature::BYTES];
-            bytes_.copy_from_slice(bytes);
-            Ok(Signature::new(bytes_))
-        }
+    impl ed25519_trait::SignatureEncoding for Signature {
+        type Repr = Signature;
     }
 
     impl ed25519_trait::Signer<Signature> for SecretKey {
@@ -550,7 +555,7 @@ mod ed25519_trait {
             #[cfg(feature = "std")]
             {
                 self.verify(message, signature)
-                    .map_err(|e| ed25519_trait::Error::from_source(e))
+                    .map_err(ed25519_trait::Error::from_source)
             }
 
             #[cfg(not(feature = "std"))]