Merge pull request #78 from cspr-rad/feature/crypto-wasm-compatibility

Hide filesystem functions in `kairos-crypto` behind feature flag.

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"

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 }

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,

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;