Merge pull request #3056 from autonomys/no_std-core-serde

Remove `serde_arrays` to make `serde` support in `subspace-core-primitives` `no_std`-compatible

crates/subspace-core-primitives/Cargo.toml

@@ -17,8 +17,6 @@ bench = false
 
 [dependencies]
 blake3 = { version = "1.5.3", default-features = false }
-# TODO: Remove once we switch to big-endian
-blst = "0.3.13"
 bytes = { version = "1.7.1", default-features = false }
 derive_more = { version = "1.0.0", default-features = false, features = ["full"] }
 hex = { version = "0.4.3", default-features = false, features = ["alloc"] }
@@ -30,7 +28,6 @@ rayon = { version = "1.10.0", optional = true }
 rust-kzg-blst = { git = "https://github.com/grandinetech/rust-kzg", rev = "6c8fcc623df3d7e8c0f30951a49bfea764f90bf4", default-features = false }
 scale-info = { version = "2.11.2", default-features = false, features = ["derive"] }
 serde = { version = "1.0.206", optional = true, features = ["alloc", "derive"] }
-serde_arrays = { version = "0.1.0", optional = true }
 # Replacement for `parking_lot` in `no_std` environment
 spin = "0.9.7"
 static_assertions = "1.1.0"
@@ -58,8 +55,6 @@ parallel = [
 ]
 serde = [
     "dep:serde",
-    # TODO: `serde_arrays` doesn't support `no_std` right now: https://github.com/Kromey/serde_arrays/issues/8
-    "dep:serde_arrays",
     "hex/serde",
 ]
 std = [

crates/subspace-core-primitives/src/lib.rs

@@ -525,7 +525,7 @@ impl PublicKey {
 )]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct RewardSignature(
-    #[cfg_attr(feature = "serde", serde(with = "serde_arrays"))] [u8; REWARD_SIGNATURE_LENGTH],
+    #[cfg_attr(feature = "serde", serde(with = "hex"))] [u8; REWARD_SIGNATURE_LENGTH],
 );
 
 impl AsRef<[u8]> for RewardSignature {