chore(eips): make sha2 optional under kzg

crates/eips/Cargo.toml

@@ -23,15 +23,14 @@ alloy-primitives = { workspace = true, features = ["rlp"] }
 alloy-rlp = { workspace = true, features = ["derive"] }
 alloy-serde.workspace = true
 
-sha2.workspace = true
-
 # serde
 serde = { workspace = true, optional = true }
 
 # kzg
-derive_more = { workspace = true, optional = true }
 c-kzg = { workspace = true, optional = true }
+derive_more = { workspace = true, optional = true }
 once_cell = { workspace = true, features = ["race", "alloc"], optional = true }
+sha2 = { workspace = true, optional = true }
 
 # ssz
 ethereum_ssz_derive = { workspace = true, optional = true }
@@ -63,7 +62,8 @@ std = [
     "once_cell?/std",
 ]
 serde = ["dep:serde", "alloy-primitives/serde", "c-kzg?/serde"]
-kzg = ["dep:derive_more", "dep:c-kzg", "dep:once_cell"]
+kzg = ["sha2", "dep:derive_more", "dep:c-kzg", "dep:once_cell"]
+sha2 = ["dep:sha2"]
 ssz = [
     "std",
     "dep:ethereum_ssz",

crates/eips/src/eip4844/mod.rs

@@ -90,6 +90,7 @@ pub type Bytes48 = FixedBytes<48>;
 /// # Panics
 ///
 /// If the given commitment is not 48 bytes long.
+#[cfg(feature = "kzg")]
 pub fn kzg_to_versioned_hash(commitment: &[u8]) -> B256 {
     use sha2::Digest;
 

crates/eips/src/eip4844/utils.rs

@@ -2,6 +2,7 @@
 //! [`SidecarCoder`].
 //!
 //! [`SidecarCoder`]: crate::eip4844::builder::SidecarCoder
+
 use crate::eip4844::USABLE_BITS_PER_FIELD_ELEMENT;
 
 /// Determine whether a slice of bytes can be contained in a field element.