From 59d8d543b2f0bf1181cfbca7b5e2be6242835eb1 Mon Sep 17 00:00:00 2001
From: Didactic Drunk <1479616+didactic-drunk@users.noreply.github.com>
Date: Mon, 28 Oct 2019 14:12:03 -0700
Subject: [PATCH] Fix Crystal 0.31 warnings.

---
 src/sodium/cipher/aead/chalsa.cr | 4 ++--
 src/sodium/cipher/chalsa.cr      | 4 ++--
 src/sodium/secure_buffer.cr      | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/sodium/cipher/aead/chalsa.cr b/src/sodium/cipher/aead/chalsa.cr
index 3398ee5..74e68ec 100644
--- a/src/sodium/cipher/aead/chalsa.cr
+++ b/src/sodium/cipher/aead/chalsa.cr
@@ -137,11 +137,11 @@ module Sodium::Cipher::Aead
         dst
       end
 
-      protected def key_size
+      protected def key_size : Int32
         KEY_SIZE
       end
 
-      protected def mac_size
+      protected def mac_size : Int32
         MAC_SIZE
       end
     end
diff --git a/src/sodium/cipher/chalsa.cr b/src/sodium/cipher/chalsa.cr
index 3b7f5fc..1c1cacd 100644
--- a/src/sodium/cipher/chalsa.cr
+++ b/src/sodium/cipher/chalsa.cr
@@ -105,11 +105,11 @@ module Sodium::Cipher
         end
       end
 
-      def key_size
+      def key_size : Int32
         LibSodium.crypto_stream_chacha20_ietf_keybytes.to_i32
       end
 
-      def nonce_size
+      def nonce_size : Int32
         LibSodium.crypto_stream_chacha20_ietf_noncebytes.to_i32
       end
     end
diff --git a/src/sodium/secure_buffer.cr b/src/sodium/secure_buffer.cr
index a7d4248..450a6b9 100644
--- a/src/sodium/secure_buffer.cr
+++ b/src/sodium/secure_buffer.cr
@@ -70,7 +70,7 @@ module Sodium
 
     # Returns key
     # May permanently set key to readonly depending on class usage.
-    def to_slice
+    def to_slice : Bytes
       case @state
       when State::Noaccess, State::Wiped
         readonly