chore(trie): add account to trie crate (#2180)

crates/trie/src/account.rs

@@ -0,0 +1,39 @@
+use reth_primitives::{proofs::EMPTY_ROOT, Account, H256, KECCAK_EMPTY, U256};
+use reth_rlp::{RlpDecodable, RlpEncodable};
+
+/// An Ethereum account as represented in the trie.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Default, RlpEncodable, RlpDecodable)]
+pub struct EthAccount {
+    /// Account nonce.
+    nonce: u64,
+    /// Account balance.
+    balance: U256,
+    /// Account's storage root.
+    storage_root: H256,
+    /// Hash of the account's bytecode.
+    code_hash: H256,
+}
+
+impl From<Account> for EthAccount {
+    fn from(acc: Account) -> Self {
+        EthAccount {
+            nonce: acc.nonce,
+            balance: acc.balance,
+            storage_root: EMPTY_ROOT,
+            code_hash: acc.bytecode_hash.unwrap_or(KECCAK_EMPTY),
+        }
+    }
+}
+
+impl EthAccount {
+    /// Set storage root on account.
+    pub fn with_storage_root(mut self, storage_root: H256) -> Self {
+        self.storage_root = storage_root;
+        self
+    }
+
+    /// Get account's storage root.
+    pub fn storage_root(&self) -> H256 {
+        self.storage_root
+    }
+}