refactor: implement AccessTuple conversion methods in firehose-protos

crates/firehose-protos/Cargo.toml

@@ -8,6 +8,7 @@ doctest = false
 path = "src/lib.rs"
 
 [dependencies]
+alloy-eip2930.workspace = true
 alloy-primitives.workspace = true
 ethportal-api.workspace = true
 primitive-types.workspace = true

crates/firehose-protos/src/error.rs

@@ -14,6 +14,9 @@ pub enum ProtosError {
     #[error("GraffitiInvalid")]
     GraffitiInvalid,
 
+    #[error("Invalid access tuple storage key: {0}")]
+    InvalidAccessTupleStorageKey(String),
+
     #[error("Invalid log address: {0}")]
     InvalidLogAddress(String),
 

crates/firehose-protos/src/ethereum_v2/access.rs

@@ -0,0 +1,33 @@
+use crate::error::ProtosError;
+
+use super::AccessTuple;
+
+use alloy_eip2930::AccessListItem;
+use alloy_primitives::{hex, Address, B256};
+
+impl TryFrom<&AccessTuple> for AccessListItem {
+    type Error = ProtosError;
+
+    fn try_from(tuple: &AccessTuple) -> Result<Self, Self::Error> {
+        let address = Address::from_slice(tuple.address.as_slice());
+
+        let storage_keys = tuple
+            .storage_keys
+            .iter()
+            .map(convert_to_b256)
+            .collect::<Result<Vec<B256>, ProtosError>>()?;
+
+        Ok(AccessListItem {
+            address,
+            storage_keys,
+        })
+    }
+}
+
+fn convert_to_b256(key: &Vec<u8>) -> Result<B256, ProtosError> {
+    let key_bytes: [u8; 32] = key
+        .as_slice()
+        .try_into()
+        .map_err(|_| ProtosError::InvalidAccessTupleStorageKey(hex::encode(key.clone())))?;
+    Ok(B256::from(key_bytes))
+}

crates/firehose-protos/src/ethereum_v2/mod.rs

@@ -2,6 +2,7 @@
 //! See the protobuffer definitions section of the README for more information.
 //!
 
+pub mod access;
 pub mod eth_block;
 pub mod log;
 pub mod transaction;

crates/flat-files-decoder/src/transactions/access_list.rs

@@ -1,37 +1,14 @@
 use crate::transactions::error::TransactionError;
 use alloy_eip2930::{AccessList, AccessListItem};
-use alloy_primitives::{Address, B256};
 use firehose_protos::ethereum_v2::AccessTuple;
-use revm_primitives::hex;
 
 pub(crate) fn compute_access_list(
     access_list: &[AccessTuple],
 ) -> Result<AccessList, TransactionError> {
-    let access_list_items: Vec<AccessListItem> = access_list
+    let access_list_items = access_list
         .iter()
-        .map(atuple_to_alist_item)
-        .collect::<Result<Vec<AccessListItem>, TransactionError>>(
-    )?;
+        .map(AccessListItem::try_from)
+        .collect::<Result<Vec<AccessListItem>, _>>()?;
 
     Ok(AccessList(access_list_items))
 }
-
-fn atuple_to_alist_item(tuple: &AccessTuple) -> Result<AccessListItem, TransactionError> {
-    let address: Address = Address::from_slice(tuple.address.as_slice());
-    let storage_keys = tuple
-        .storage_keys
-        .iter()
-        .map(|key| {
-            let key_bytes: [u8; 32] = key
-                .as_slice()
-                .try_into()
-                .map_err(|_| TransactionError::InvalidStorageKey(hex::encode(key.clone())))?;
-            Ok(B256::from(key_bytes))
-        })
-        .collect::<Result<Vec<B256>, TransactionError>>()?;
-
-    Ok(AccessListItem {
-        address,
-        storage_keys,
-    })
-}

crates/flat-files-decoder/src/transactions/error.rs

@@ -1,5 +1,6 @@
 use crate::transactions::signature::InvalidSignatureError;
 use crate::transactions::tx_type::TransactionTypeError;
+use firehose_protos::error::ProtosError;
 use thiserror::Error;
 
 #[derive(Error, Debug)]
@@ -26,4 +27,6 @@ pub enum TransactionError {
     MissingMaxFeePerGas,
     #[error("Missing Header")]
     MissingHeader,
+    #[error("Protos Error: {0}")]
+    ProtosError(#[from] ProtosError),
 }