Make helium-crypto-rs compilable with the latest ed25519-compact version

Cargo.toml

@@ -18,7 +18,7 @@ serde = { version = "1", features = ["derive"] }
 rand_core = "^0.6"
 getrandom = "0"
 sha2 = { version = "0.10", default-features = false, features = ["std", "oid"] }
-ed25519-compact = { version = "=2.0.6", features = ["std", "traits"] }
+ed25519-compact = { version = "2", features = ["std", "traits"] }
 p256 = { version = "0.10", default-features = false, features = [
     "arithmetic",
     "ecdsa",

src/ed25519/mod.rs

@@ -100,11 +100,13 @@ impl Keypair {
 
 impl signature::Signature for Signature {
     fn from_bytes(input: &[u8]) -> std::result::Result<Self, signature::Error> {
-        Ok(Signature(signature::Signature::from_bytes(input)?))
+        let signature = ed25519_compact::Signature::try_from(input)
+            .map_err(|e| signature::Error::from_source(e))?;
+        Ok(Signature(signature))
     }
 
     fn as_bytes(&self) -> &[u8] {
-        self.0.as_bytes()
+        self.0.as_ref()
     }
 }
 
@@ -138,7 +140,8 @@ impl signature::Signer<Signature> for Keypair {
 
 impl Signature {
     pub fn from_bytes(bytes: &[u8]) -> Result<Self> {
-        Ok(Signature(signature::Signature::from_bytes(bytes)?))
+        let signature = ed25519_compact::Signature::try_from(bytes)?;
+        Ok(Signature(signature))
     }
 
     pub fn to_vec(&self) -> Vec<u8> {
@@ -150,7 +153,7 @@ impl TryFrom<&[u8]> for Signature {
     type Error = Error;
 
     fn try_from(input: &[u8]) -> Result<Self> {
-        signature::Signature::from_bytes(input)
+        ed25519_compact::Signature::try_from(input)
             .map(Signature)
             .map_err(Error::from)
     }