Modify create_proof_of_possession, and verifying proof_of_possession in process_deposits

eth2/utils/bls/src/lib.rs

@@ -20,7 +20,6 @@ pub const BLS_AGG_SIG_BYTE_SIZE: usize = 96;
 
 use hashing::hash;
 use ssz::ssz_encode;
-use types::{DepositInput, Hash256};
 
 /// For some signature and public key, ensure that the signature message was the public key and it
 /// was signed by the secret key that corresponds to that public key.
@@ -30,11 +29,6 @@ pub fn verify_proof_of_possession(sig: &Signature, pubkey: &PublicKey) -> bool {
     sig.verify(&ssz_encode(pubkey), 0, &pubkey)
 }
 
-// TODO: Update this method
-// https://github.com/sigp/lighthouse/issues/239
-pub fn create_proof_of_possession(keypair: &Keypair, withdrawal_credentials: &Hash256) -> Signature {
-    Signature::new(&ssz_encode(&keypair.pk), 0, &keypair.sk)
-}
 
 /// Returns the withdrawal credentials for a given public key.
 pub fn get_withdrawal_credentials(pubkey: &PublicKey, prefix_byte: u8) -> Vec<u8> {