[OLD] feat(client): providers generic over oracles

bin/client/src/comms/caching_oracle.rs

@@ -3,12 +3,12 @@
 //!
 //! [OracleReader]: kona_preimage::OracleReader
 
-use crate::ORACLE_READER;
+use crate::{HINT_WRITER, ORACLE_READER};
 use alloc::{boxed::Box, sync::Arc, vec::Vec};
 use anyhow::Result;
 use async_trait::async_trait;
 use core::num::NonZeroUsize;
-use kona_preimage::{PreimageKey, PreimageOracleClient};
+use kona_preimage::{HintWriterClient, PreimageKey, PreimageOracleClient};
 use lru::LruCache;
 use spin::Mutex;
 
@@ -63,3 +63,10 @@ impl PreimageOracleClient for CachingOracle {
         }
     }
 }
+
+#[async_trait]
+impl HintWriterClient for CachingOracle {
+    async fn write(&self, hint: &str) -> Result<()> {
+        HINT_WRITER.write(hint).await
+    }
+}

bin/client/src/kona.rs

@@ -9,7 +9,7 @@ use alloc::sync::Arc;
 use alloy_consensus::Header;
 use kona_client::{
     l1::{DerivationDriver, OracleBlobProvider, OracleL1ChainProvider},
-    l2::{OracleL2ChainProvider, TrieDBHintWriter},
+    l2::OracleL2ChainProvider,
     BootInfo, CachingOracle,
 };
 use kona_common_proc::client_entry;
@@ -60,8 +60,8 @@ fn main() -> Result<()> {
         let mut executor = StatelessL2BlockExecutor::new(
             &boot.rollup_config,
             driver.take_l2_safe_head_header(),
+            l2_provider.clone(),
             l2_provider,
-            TrieDBHintWriter,
         );
         let Header { number, .. } = *executor.execute_payload(attributes)?;
         let output_root = executor.compute_output_root()?;

bin/client/src/l1/blob_provider.rs

@@ -1,6 +1,6 @@
 //! Contains the concrete implementation of the [BlobProvider] trait for the client program.
 
-use crate::{CachingOracle, HintType, HINT_WRITER};
+use crate::HintType;
 use alloc::{boxed::Box, sync::Arc, vec::Vec};
 use alloy_consensus::Blob;
 use alloy_eips::eip4844::FIELD_ELEMENTS_PER_BLOB;
@@ -10,18 +10,18 @@ use kona_derive::{
     traits::BlobProvider,
     types::{BlobProviderError, IndexedBlobHash},
 };
-use kona_preimage::{HintWriterClient, PreimageKey, PreimageKeyType, PreimageOracleClient};
+use kona_preimage::{CommsClient, PreimageKey, PreimageKeyType};
 use kona_primitives::BlockInfo;
 
 /// An oracle-backed blob provider.
 #[derive(Debug, Clone)]
-pub struct OracleBlobProvider {
-    oracle: Arc<CachingOracle>,
+pub struct OracleBlobProvider<T: CommsClient> {
+    oracle: Arc<T>,
 }
 
-impl OracleBlobProvider {
+impl<T: CommsClient> OracleBlobProvider<T> {
     /// Constructs a new `OracleBlobProvider`.
-    pub fn new(oracle: Arc<CachingOracle>) -> Self {
+    pub fn new(oracle: Arc<T>) -> Self {
         Self { oracle }
     }
 
@@ -45,7 +45,7 @@ impl OracleBlobProvider {
         blob_req_meta[40..48].copy_from_slice(block_ref.timestamp.to_be_bytes().as_ref());
 
         // Send a hint for the blob commitment and field elements.
-        HINT_WRITER.write(&HintType::L1Blob.encode_with(&[blob_req_meta.as_ref()])).await?;
+        self.oracle.write(&HintType::L1Blob.encode_with(&[blob_req_meta.as_ref()])).await?;
 
         // Fetch the blob commitment.
         let mut commitment = [0u8; 48];
@@ -77,7 +77,7 @@ impl OracleBlobProvider {
 }
 
 #[async_trait]
-impl BlobProvider for OracleBlobProvider {
+impl<T: CommsClient + Sync + Send> BlobProvider for OracleBlobProvider<T> {
     async fn get_blobs(
         &mut self,
         block_ref: &BlockInfo,