Add additional utils (#9)

* add bytes_20_hex

* add bytes_20_hex

* add bytes_20_hex

* add address utils

* add address utils

* add b256 utils

* remove ssz feature flag

Cargo.toml

@@ -14,7 +14,7 @@ categories = ["cryptography::cryptocurrencies"]
 name = "serde_utils"
 
 [dependencies]
-alloy-primitives = { version = "0.7.0", features = ["ssz", "serde"] }
+alloy-primitives = { version = "0.7.7", features = ["serde"] }
 serde = { version = "1.0.0", features = ["derive"] }
 serde_derive = "1.0.0"
 serde_json = "1.0.0"

src/address_hex.rs

@@ -0,0 +1,34 @@
+use alloy_primitives::Address;
+use serde::de::Error;
+use serde::{Deserializer, Serializer};
+
+use crate::hex::PrefixedHexVisitor;
+
+pub fn serialize<S>(address: &Address, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    let mut hex_string: String = "0x".to_string();
+    hex_string.push_str(&hex::encode(&address));
+
+    serializer.serialize_str(&hex_string)
+}
+
+pub fn deserialize<'de, D>(deserializer: D) -> Result<Address, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let decoded = deserializer.deserialize_str(PrefixedHexVisitor)?;
+
+    if decoded.len() != 20 {
+        return Err(D::Error::custom(format!(
+            "expected {} bytes for array, got {}",
+            20,
+            decoded.len()
+        )));
+    }
+
+    let mut array = [0; 20];
+    array.copy_from_slice(&decoded);
+    Ok(array.into())
+}

src/b256_hex.rs

@@ -0,0 +1,34 @@
+use alloy_primitives::B256;
+use serde::de::Error;
+use serde::{Deserializer, Serializer};
+
+use crate::hex::PrefixedHexVisitor;
+
+pub fn serialize<S>(hash: &B256, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    let mut hex_string: String = "0x".to_string();
+    hex_string.push_str(&hex::encode(&hash));
+
+    serializer.serialize_str(&hex_string)
+}
+
+pub fn deserialize<'de, D>(deserializer: D) -> Result<B256, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let decoded = deserializer.deserialize_str(PrefixedHexVisitor)?;
+
+    if decoded.len() != 32 {
+        return Err(D::Error::custom(format!(
+            "expected {} bytes for array, got {}",
+            32,
+            decoded.len()
+        )));
+    }
+
+    let mut array = [0; 32];
+    array.copy_from_slice(&decoded);
+    Ok(array.into())
+}

src/lib.rs

@@ -1,5 +1,7 @@
 mod quoted_int;
 
+pub mod address_hex;
+pub mod b256_hex;
 pub mod fixed_bytes_hex;
 pub mod hex;
 pub mod hex_vec;