chore(mpt): noop provider refactor

crates/executor/Cargo.toml

@@ -11,6 +11,9 @@ homepage.workspace = true
 [lints]
 workspace = true
 
+[profile.bench]
+default = ["kona-mpt/test-utils"]
+
 [dependencies]
 # General
 thiserror.workspace = true

crates/executor/benches/execution.rs

@@ -8,7 +8,7 @@ use alloy_rpc_types_engine::PayloadAttributes;
 use anyhow::{anyhow, Result};
 use criterion::{criterion_group, criterion_main, Bencher, Criterion};
 use kona_executor::StatelessL2BlockExecutor;
-use kona_mpt::{NoopTrieHinter, TrieProvider};
+use kona_mpt::{test_util::NoopTrieHinter, TrieProvider};
 use op_alloy_genesis::{RollupConfig, OP_MAINNET_BASE_FEE_PARAMS};
 use op_alloy_rpc_types_engine::OptimismPayloadAttributes;
 use pprof::criterion::{Output, PProfProfiler};

crates/executor/src/lib.rs

@@ -703,7 +703,7 @@ mod test {
     use alloy_rlp::Decodable;
     use alloy_rpc_types_engine::PayloadAttributes;
     use anyhow::{anyhow, Result};
-    use kona_mpt::NoopTrieHinter;
+    use kona_mpt::test_util::NoopTrieHinter;
     use op_alloy_genesis::OP_MAINNET_BASE_FEE_PARAMS;
     use serde::Deserialize;
     use std::collections::HashMap;

crates/mpt/Cargo.toml

@@ -11,11 +11,20 @@ homepage.workspace = true
 [lints]
 workspace = true
 
+[profile.bench]
+default = ["test-utils"]
+
 [dependencies]
 # General
 tracing.workspace = true
 thiserror.workspace = true
 
+# `test-utils`
+reqwest = { workspace = true, optional = true }
+anyhow = { workspace = true, optional = true }
+alloy-rpc-types = { workspace = true, features = ["eth"], optional = true }
+alloy-provider = { workspace = true, optional = true }
+
 # Revm + Alloy
 revm.workspace = true
 alloy-primitives = { workspace = true, features = ["rlp"] }
@@ -25,7 +34,6 @@ alloy-trie.workspace = true
 
 [dev-dependencies]
 tokio.workspace = true
-anyhow.workspace = true
 reqwest.workspace = true
 futures.workspace = true
 tracing-subscriber.workspace = true
@@ -40,6 +48,15 @@ proptest.workspace = true
 criterion.workspace = true
 pprof.workspace = true
 
+[features]
+default = []
+test-utils = [
+  "dep:anyhow",
+  "dep:reqwest",
+  "dep:alloy-provider",
+  "dep:alloy-rpc-types",
+]
+
 [[bench]]
 name = "trie_node"
 harness = false

crates/mpt/benches/trie_node.rs

@@ -3,7 +3,10 @@
 
 use alloy_trie::Nibbles;
 use criterion::{criterion_group, criterion_main, Criterion};
-use kona_mpt::{NoopTrieHinter, NoopTrieProvider, TrieNode};
+use kona_mpt::{
+    test_util::{NoopTrieHinter, NoopTrieProvider},
+    TrieNode,
+};
 use pprof::criterion::{Output, PProfProfiler};
 use rand::{rngs::StdRng, seq::SliceRandom, Rng, SeedableRng};
 

crates/mpt/src/db/mod.rs

@@ -46,34 +46,37 @@ pub use account::TrieAccount;
 ///   [BLOCK_HASH_HISTORY] blocks back relative to the current parent block hash.
 ///
 /// **Example Construction**:
-/// ```rust
-/// use alloy_consensus::{Header, Sealable};
-/// use alloy_primitives::{Bytes, B256};
-/// use anyhow::Result;
-/// use kona_mpt::{NoopTrieHinter, NoopTrieProvider, TrieDB};
-/// use revm::{db::states::bundle_state::BundleRetention, EvmBuilder, StateBuilder};
-///
-/// let mock_starting_root = B256::default();
-/// let mock_parent_block_header = Header::default();
-///
-/// let trie_db = TrieDB::new(
-///     mock_starting_root,
-///     mock_parent_block_header.seal_slow(),
-///     NoopTrieProvider,
-///     NoopTrieHinter,
-/// );
-/// let mut state = StateBuilder::new_with_database(trie_db).with_bundle_update().build();
-/// let evm = EvmBuilder::default().with_db(&mut state).build();
-///
-/// // Execute your block's transactions...
-///
-/// // Drop the EVM prior to merging the state transitions.
-/// drop(evm);
-///
-/// state.merge_transitions(BundleRetention::Reverts);
-/// let bundle = state.take_bundle();
-/// let state_root = state.database.state_root(&bundle).expect("Failed to compute state root");
-/// ```
+#[cfg_attr(
+    feature = "test-utils",
+    doc = "
+use alloy_consensus::{Header, Sealable};
+use alloy_primitives::{Bytes, B256};
+use anyhow::Result;
+use kona_mpt::{NoopTrieHinter, NoopTrieProvider, TrieDB};
+use revm::{db::states::bundle_state::BundleRetention, EvmBuilder, StateBuilder};
+
+let mock_starting_root = B256::default();
+let mock_parent_block_header = Header::default();
+
+let trie_db = TrieDB::new(
+    mock_starting_root,
+    mock_parent_block_header.seal_slow(),
+    NoopTrieProvider,
+    NoopTrieHinter,
+);
+let mut state = StateBuilder::new_with_database(trie_db).with_bundle_update().build();
+let evm = EvmBuilder::default().with_db(&mut state).build();
+
+// Execute your block's transactions...
+
+// Drop the EVM prior to merging the state transitions.
+drop(evm);
+
+state.merge_transitions(BundleRetention::Reverts);
+let bundle = state.take_bundle();
+let state_root = state.database.state_root(&bundle).expect(\"Failed to compute state root\");
+"
+)]
 ///
 /// [State]: revm::State
 #[derive(Debug, Clone)]

crates/mpt/src/fetcher.rs

@@ -1,7 +1,7 @@
 //! Contains the [TrieProvider] trait for fetching trie node preimages, contract bytecode, and
 //! headers.
 
-use alloc::string::{String, ToString};
+use alloc::string::ToString;
 use alloy_consensus::Header;
 use alloy_primitives::{Address, Bytes, B256, U256};
 use core::fmt::Display;
@@ -93,48 +93,3 @@ pub trait TrieHinter {
         block_number: u64,
     ) -> Result<(), Self::Error>;
 }
-
-/// The default, no-op implementation of the [TrieProvider] trait, used for testing.
-#[derive(Debug, Clone, Copy)]
-pub struct NoopTrieProvider;
-
-impl TrieProvider for NoopTrieProvider {
-    type Error = String;
-
-    fn trie_node_preimage(&self, _key: B256) -> Result<Bytes, Self::Error> {
-        Ok(Bytes::new())
-    }
-
-    fn bytecode_by_hash(&self, _code_hash: B256) -> Result<Bytes, Self::Error> {
-        Ok(Bytes::new())
-    }
-
-    fn header_by_hash(&self, _hash: B256) -> Result<Header, Self::Error> {
-        Ok(Header::default())
-    }
-}
-
-/// The default, no-op implementation of the [TrieHinter] trait, used for testing.
-#[derive(Debug, Clone, Copy)]
-pub struct NoopTrieHinter;
-
-impl TrieHinter for NoopTrieHinter {
-    type Error = String;
-
-    fn hint_trie_node(&self, _hash: B256) -> Result<(), Self::Error> {
-        Ok(())
-    }
-
-    fn hint_account_proof(&self, _address: Address, _block_number: u64) -> Result<(), Self::Error> {
-        Ok(())
-    }
-
-    fn hint_storage_proof(
-        &self,
-        _address: Address,
-        _slot: U256,
-        _block_number: u64,
-    ) -> Result<(), Self::Error> {
-        Ok(())
-    }
-}

crates/mpt/src/lib.rs

@@ -19,7 +19,7 @@ pub use errors::{
 };
 
 mod fetcher;
-pub use fetcher::{NoopTrieHinter, NoopTrieProvider, TrieHinter, TrieProvider};
+pub use fetcher::{TrieHinter, TrieProvider};
 
 mod node;
 pub use node::TrieNode;
@@ -30,5 +30,5 @@ pub use list_walker::OrderedListWalker;
 mod util;
 pub use util::ordered_trie_with_encoder;
 
-#[cfg(test)]
-mod test_util;
+#[cfg(any(test, feature = "test-utils"))]
+pub mod test_util;

crates/mpt/src/list_walker.rs

@@ -168,9 +168,8 @@ mod test {
         ordered_trie_with_encoder,
         test_util::{
             get_live_derivable_receipts_list, get_live_derivable_transactions_list,
-            TrieNodeProvider,
+            NoopTrieProvider, TrieNodeProvider,
         },
-        NoopTrieProvider,
     };
     use alloc::{collections::BTreeMap, string::String, vec::Vec};
     use alloy_consensus::{ReceiptEnvelope, TxEnvelope};

crates/mpt/src/node.rs

@@ -684,8 +684,9 @@ impl Decodable for TrieNode {
 mod test {
     use super::*;
     use crate::{
-        fetcher::NoopTrieProvider, ordered_trie_with_encoder, test_util::TrieNodeProvider,
-        NoopTrieHinter, TrieNode,
+        ordered_trie_with_encoder,
+        test_util::{NoopTrieHinter, NoopTrieProvider, TrieNodeProvider},
+        TrieNode,
     };
     use alloc::{collections::BTreeMap, vec, vec::Vec};
     use alloy_primitives::{b256, bytes, hex, keccak256};

crates/mpt/src/test_util.rs

@@ -1,9 +1,9 @@
 //! Testing utilities for `kona-mpt`
 
-use crate::{ordered_trie_with_encoder, TrieProvider};
-use alloc::{collections::BTreeMap, vec::Vec};
-use alloy_consensus::{Receipt, ReceiptEnvelope, ReceiptWithBloom, TxEnvelope, TxType};
-use alloy_primitives::{keccak256, Bytes, Log, B256};
+use crate::{ordered_trie_with_encoder, TrieHinter, TrieProvider};
+use alloc::{collections::BTreeMap, string::String, vec::Vec};
+use alloy_consensus::{Header, Receipt, ReceiptEnvelope, ReceiptWithBloom, TxEnvelope, TxType};
+use alloy_primitives::{keccak256, Address, Bytes, Log, B256, U256};
 use alloy_provider::{network::eip2718::Encodable2718, Provider, ProviderBuilder};
 use alloy_rpc_types::{BlockTransactions, BlockTransactionsKind};
 use anyhow::{anyhow, Result};
@@ -12,7 +12,7 @@ use reqwest::Url;
 const RPC_URL: &str = "https://docs-demo.quiknode.pro/";
 
 /// Grabs a live merkleized receipts list within a block header.
-pub(crate) async fn get_live_derivable_receipts_list(
+pub async fn get_live_derivable_receipts_list(
 ) -> Result<(B256, BTreeMap<B256, Bytes>, Vec<ReceiptEnvelope>)> {
     // Initialize the provider.
     let provider = ProviderBuilder::new().on_http(Url::parse(RPC_URL).expect("invalid rpc url"));
@@ -78,7 +78,7 @@ pub(crate) async fn get_live_derivable_receipts_list(
 }
 
 /// Grabs a live merkleized transactions list within a block header.
-pub(crate) async fn get_live_derivable_transactions_list(
+pub async fn get_live_derivable_transactions_list(
 ) -> Result<(B256, BTreeMap<B256, Bytes>, Vec<TxEnvelope>)> {
     // Initialize the provider.
     let provider = ProviderBuilder::new().on_http(Url::parse(RPC_URL).expect("invalid rpc url"));
@@ -118,15 +118,62 @@ pub(crate) async fn get_live_derivable_transactions_list(
     Ok((root, preimages, consensus_txs))
 }
 
+/// The default, no-op implementation of the [TrieProvider] trait, used for testing.
+#[derive(Debug, Clone, Copy)]
+pub struct NoopTrieProvider;
+
+impl TrieProvider for NoopTrieProvider {
+    type Error = String;
+
+    fn trie_node_preimage(&self, _key: B256) -> Result<Bytes, Self::Error> {
+        Ok(Bytes::new())
+    }
+
+    fn bytecode_by_hash(&self, _code_hash: B256) -> Result<Bytes, Self::Error> {
+        Ok(Bytes::new())
+    }
+
+    fn header_by_hash(&self, _hash: B256) -> Result<Header, Self::Error> {
+        Ok(Header::default())
+    }
+}
+
+/// The default, no-op implementation of the [TrieHinter] trait, used for testing.
+#[derive(Debug, Clone, Copy)]
+pub struct NoopTrieHinter;
+
+impl TrieHinter for NoopTrieHinter {
+    type Error = String;
+
+    fn hint_trie_node(&self, _hash: B256) -> Result<(), Self::Error> {
+        Ok(())
+    }
+
+    fn hint_account_proof(&self, _address: Address, _block_number: u64) -> Result<(), Self::Error> {
+        Ok(())
+    }
+
+    fn hint_storage_proof(
+        &self,
+        _address: Address,
+        _slot: U256,
+        _block_number: u64,
+    ) -> Result<(), Self::Error> {
+        Ok(())
+    }
+}
+
 /// A mock [TrieProvider] for testing that serves in-memory preimages.
-pub(crate) struct TrieNodeProvider {
+#[derive(Debug, Clone)]
+pub struct TrieNodeProvider {
     preimages: BTreeMap<B256, Bytes>,
     bytecode: BTreeMap<B256, Bytes>,
     headers: BTreeMap<B256, alloy_consensus::Header>,
 }
 
 impl TrieNodeProvider {
-    pub(crate) const fn new(
+    /// Constructs a new [TrieNodeProvider].
+    pub const fn new(
         preimages: BTreeMap<B256, Bytes>,
         bytecode: BTreeMap<B256, Bytes>,
         headers: BTreeMap<B256, alloy_consensus::Header>,