From 805b11330d2852b5c2678a00e66abc102818b741 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andrzej=20Bro=C5=84ski?= <andrzej1_1@o2.pl>
Date: Thu, 25 Apr 2024 12:20:35 +0200
Subject: [PATCH 1/2] Hide filesystem functions in crypto behind feature flag.

---
 kairos-crypto/Cargo.toml                    | 3 ++-
 kairos-crypto/src/implementations/casper.rs | 3 +++
 kairos-crypto/src/lib.rs                    | 2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/kairos-crypto/Cargo.toml b/kairos-crypto/Cargo.toml
index 894086ed..f0c0213f 100644
--- a/kairos-crypto/Cargo.toml
+++ b/kairos-crypto/Cargo.toml
@@ -7,6 +7,7 @@ license.workspace = true
 [features]
 default = ["crypto-casper"]
 crypto-casper = ["casper-types"]
+fs = ["casper-types/std"] # TODO: Change `std` -> `std-fs-io` in the future version.
 
 [lib]
 
@@ -15,4 +16,4 @@ hex = "0.4"
 thiserror = "1"
 
 # Casper signer implementation.
-casper-types = { version = "4", optional = true, features = ["std"] } # TODO: Change `std` -> `std-fs-io` in the future version.
+casper-types = { version = "4", optional = true }
diff --git a/kairos-crypto/src/implementations/casper.rs b/kairos-crypto/src/implementations/casper.rs
index 9b0fcc57..645a73da 100644
--- a/kairos-crypto/src/implementations/casper.rs
+++ b/kairos-crypto/src/implementations/casper.rs
@@ -1,5 +1,7 @@
 use casper_types::bytesrepr::{FromBytes, ToBytes};
 use casper_types::{crypto, PublicKey, SecretKey, Signature};
+
+#[cfg(feature = "fs")]
 use std::path::Path;
 
 use crate::CryptoError;
@@ -11,6 +13,7 @@ pub struct Signer {
 }
 
 impl CryptoSigner for Signer {
+    #[cfg(feature = "fs")]
     fn from_private_key_file<P: AsRef<Path>>(file: P) -> Result<Self, CryptoError>
     where
         Self: Sized,
diff --git a/kairos-crypto/src/lib.rs b/kairos-crypto/src/lib.rs
index a8f31aeb..e45477cf 100644
--- a/kairos-crypto/src/lib.rs
+++ b/kairos-crypto/src/lib.rs
@@ -1,11 +1,13 @@
 pub mod error;
 pub mod implementations;
 
+#[cfg(feature = "fs")]
 use std::path::Path;
 
 use error::CryptoError;
 
 pub trait CryptoSigner {
+    #[cfg(feature = "fs")]
     fn from_private_key_file<P: AsRef<Path>>(file: P) -> Result<Self, CryptoError>
     where
         Self: Sized;

From 343a6c2f08454eee493cd008caf999c44b68e914 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andrzej=20Bro=C5=84ski?= <andrzej1_1@o2.pl>
Date: Thu, 25 Apr 2024 12:20:53 +0200
Subject: [PATCH 2/2] Enable crypto's `fs` in CLI.

---
 kairos-cli/Cargo.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kairos-cli/Cargo.toml b/kairos-cli/Cargo.toml
index df53204e..69535981 100644
--- a/kairos-cli/Cargo.toml
+++ b/kairos-cli/Cargo.toml
@@ -18,7 +18,7 @@ casper-types = { version = "4.0.1", features = ["std"] } # TODO: Change `std` ->
 clap = { version = "4.5", features = ["derive", "deprecated"] }
 hex = "0.4"
 thiserror = "1"
-kairos-crypto = { path = "../kairos-crypto" }
+kairos-crypto = { path = "../kairos-crypto", features = ["fs"] }
 
 [dev-dependencies]
 assert_cmd = "2"