Implement new uncompressed bytes for PublicKey

eth2/types/src/test_utils/keypairs_file.rs

@@ -4,7 +4,7 @@ use std::fs::File;
 use std::io::{Error, ErrorKind, Read, Write};
 use std::path::Path;
 
-pub const PUBLIC_KEY_BYTES_LEN: usize = 48;
+pub const PUBLIC_KEY_BYTES_LEN: usize = 96;
 pub const SECRET_KEY_BYTES_LEN: usize = 48;
 
 pub const BATCH_SIZE: usize = 1_000; // ~15MB
@@ -26,7 +26,7 @@ impl KeypairsFile for Vec<Keypair> {
 
             for keypair in keypair_batch {
                 buf.append(&mut keypair.sk.as_raw().as_bytes());
-                buf.append(&mut keypair.pk.as_raw().as_bytes());
+                buf.append(&mut keypair.pk.clone().as_uncompressed_bytes());
             }
 
             keypairs_file.write_all(&buf)?;

eth2/utils/bls/src/public_key.rs

@@ -27,14 +27,21 @@ impl PublicKey {
         &self.0
     }
 
+    /// Converts compressed bytes to PublicKey
+    pub fn from_bytes(bytes: &[u8]) -> Result<Self, DecodeError> {
+        let pubkey = RawPublicKey::from_bytes(&bytes).map_err(|_| DecodeError::Invalid)?;
+        Ok(PublicKey(pubkey))
+    }
+
     /// Returns the PublicKey as (x, y) bytes
-    pub fn as_uncompressed_bytes(&mut self) -> Vec<u8> {
-        RawPublicKey::as_uncompressed_bytes(&mut self.0)
+    pub fn as_uncompressed_bytes(&self) -> Vec<u8> {
+        RawPublicKey::as_uncompressed_bytes(&mut self.0.clone())
     }
 
     /// Converts (x, y) bytes to PublicKey
     pub fn from_uncompressed_bytes(bytes: &[u8]) -> Result<Self, DecodeError> {
-        let pubkey = RawPublicKey::from_uncompressed_bytes(&bytes).map_err(|_| DecodeError::Invalid)?;
+        let pubkey =
+            RawPublicKey::from_uncompressed_bytes(&bytes).map_err(|_| DecodeError::Invalid)?;
         Ok(PublicKey(pubkey))
     }
 
@@ -103,8 +110,14 @@ impl PartialEq for PublicKey {
 }
 
 impl Hash for PublicKey {
+    /// Note: this is distinct from consensus serialization, it will produce a different hash.
+    ///
+    /// This method uses the uncompressed bytes, which are much faster to obtain than the
+    /// compressed bytes required for consensus serialization.
+    ///
+    /// Use `ssz::Encode` to obtain the bytes required for consensus hashing.
     fn hash<H: Hasher>(&self, state: &mut H) {
-        ssz_encode(self).hash(state)
+        self.as_uncompressed_bytes().hash(state)
     }
 }