public static final KeyTemplate rawEd25519Template() {
    return exceptionIsBug(
        () ->
            KeyTemplate.createFrom(Ed25519Parameters.create(Ed25519Parameters.Variant.NO_PREFIX)));
  }
@return A {@link KeyTemplate} that generates new instances of Ed25519 keys. Keys generated from
    this template creates raw signatures of exactly 64 bytes. It's compatible with most other
    libraries.
java_src/src/main/java/com/google/crypto/tink/signature/Ed25519PrivateKeyManager.java