[WIP] Implement StableContainer

Cargo.toml

@@ -11,8 +11,8 @@ keywords = ["ethereum"]
 categories = ["cryptography::cryptocurrencies"]
 
 [dependencies]
-tree_hash = "0.6.0"
-ethereum_ssz = "0.5.0"
+tree_hash = { git = "https://github.com/macladson/tree_hash", branch = "stable-container" }
+ethereum_ssz = { git = "https://github.com/macladson/ethereum_ssz", branch = "stable-container" }
 ethereum_serde_utils = "0.5.0"
 serde = "1.0.0"
 serde_derive = "1.0.0"
@@ -24,4 +24,4 @@ itertools = "0.10.0"
 
 [dev-dependencies]
 serde_json = "1.0.0"
-tree_hash_derive = "0.6.0"
+tree_hash_derive = { git = "https://github.com/macladson/tree_hash", branch = "stable-container" }

src/bitfield.rs

@@ -316,6 +316,20 @@ impl<N: Unsigned + Clone> Bitfield<Fixed<N>> {
     }
 }
 
+impl<N: Unsigned + Clone> std::fmt::Display for Bitfield<Fixed<N>> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let mut field: String = "".to_string();
+        for i in self.iter() {
+            if i {
+                field.push('1')
+            } else {
+                field.push('0')
+            }
+        }
+        write!(f, "{field}")
+    }
+}
+
 impl<N: Unsigned + Clone> Default for Bitfield<Fixed<N>> {
     fn default() -> Self {
         Self::new()

src/fixed_vector.rs

@@ -455,6 +455,7 @@ mod test {
     }
 
     #[derive(Clone, Copy, TreeHash, Default)]
+    #[tree_hash(struct_behaviour = "container")]
     struct A {
         a: u32,
         b: u32,

src/tree_hash.rs

@@ -24,7 +24,10 @@ where
                 .finish()
                 .expect("ssz_types variable vec should not have a remaining buffer")
         }
-        TreeHashType::Container | TreeHashType::List | TreeHashType::Vector => {
+        TreeHashType::Container
+        | TreeHashType::StableContainer
+        | TreeHashType::List
+        | TreeHashType::Vector => {
             let mut hasher = MerkleHasher::with_leaves(N::to_usize());
 
             for item in vec {

src/variable_list.rs

@@ -435,6 +435,7 @@ mod test {
     }
 
     #[derive(Clone, Copy, TreeHash, Default)]
+    #[tree_hash(struct_behaviour = "container")]
     struct A {
         a: u32,
         b: u32,