use static string in dkg/error

Author: jowparks

src/dkg/error.rs

@@ -10,7 +10,8 @@ use core::fmt::Debug;
 
 #[derive(Debug)]
 pub enum Error {
-    InvalidInput(String),
+    // TODO(jwp): potentially remove these to reduce binary size
+    InvalidInput(&'static str),
     FrostError(frost::Error),
     EncryptionError(io::Error),
     DecryptionError(io::Error),

src/dkg/mod.rs

@@ -1,10 +1,8 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
- #[cfg(feature = "std")]
 pub mod error;
 pub mod group_key;
-#[cfg(feature = "std")]
 pub mod round1;
 #[cfg(feature = "std")]
 pub mod round2;

src/dkg/round1.rs

@@ -19,7 +19,9 @@ use crate::multienc;
 use crate::participant;
 use crate::participant::Identity;
 use crate::serde::read_u16;
+#[cfg(feature = "std")]
 use crate::serde::read_variable_length;
+#[cfg(feature = "std")]
 use crate::serde::read_variable_length_bytes;
 use crate::serde::write_u16;
 use crate::serde::write_variable_length;