fix(katana): invalid trie path conversion

crates/katana/rpc/rpc-types/src/trie.rs

@@ -1,9 +1,10 @@
 use std::ops::{Deref, DerefMut};
 
 use katana_primitives::contract::StorageKey;
+use katana_primitives::hash::StarkHash;
 use katana_primitives::{ContractAddress, Felt};
-use katana_trie::bonsai::BitSlice;
-use katana_trie::{MultiProof, Path, ProofNode};
+use katana_trie::bitvec::view::BitView;
+use katana_trie::{BitVec, MultiProof, Path, ProofNode};
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Default, Serialize, Deserialize)]
@@ -24,7 +25,7 @@
 }
 
 /// Node in the Merkle-Patricia trie.
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(untagged)]
 pub enum MerkleNode {
     /// Represents a path to the highest non-zero descendant node.
@@ -47,6 +48,21 @@
     },
 }
 
+impl MerkleNode {
+    // Taken from `bonsai-trie`: https://github.com/madara-alliance/bonsai-trie/blob/bfc6ad47b3cb8b75b1326bf630ca16e581f194c5/src/trie/merkle_node.rs#L234-L248
+    pub fn compute_hash<Hash: StarkHash>(&self) -> Felt {
+        match self {
+            Self::Binary { left, right } => Hash::hash(left, right),
+            Self::Edge { child, path, length } => {
+                let mut length_bytes = [0u8; 32];
+                length_bytes[31] = *length;
+                let length = Felt::from_bytes_be(&length_bytes);
+                Hash::hash(child, path) + length
+            }
+        }
+    }
+}
+
 /// The response type for `starknet_getStorageProof` method.
 ///
 /// The requested storage proofs. Note that if a requested leaf has the default value, the path to
@@ -142,40 +158,63 @@
     fn from(value: MerkleNode) -> Self {
         match value {
             MerkleNode::Binary { left, right } => Self::Binary { left, right },
-            MerkleNode::Edge { path, child, .. } => Self::Edge { child, path: felt_to_path(path) },
+            MerkleNode::Edge { path, child, length } => {
+                Self::Edge { child, path: felt_to_path(path, length) }
+            }
         }
     }
 }
 
-fn felt_to_path(felt: Felt) -> Path {
-    Path(BitSlice::from_slice(&felt.to_bytes_be())[5..].to_bitvec())
+fn felt_to_path(felt: Felt, length: u8) -> Path {
+    let length = length as usize;
+    let mut bits = BitVec::new();
+
+    // This function converts a Felt to a Path by preserving leading zeros
+    // that are semantically important in the Merkle tree path representation.
+    //
+    // Example:
+    // For a path "0000100" (length=7):
+    // - As an integer/hex: 0x4 (leading zeros get truncated)
+    // - As a Path: [0,0,0,0,1,0,0] (leading zeros preserved)
+    //
+    // We need to preserve these leading zeros because in a Merkle tree path:
+    // - Each bit represents a direction (left=0, right=1)
+    // - The position/index of each bit matters for the path traversal
+    // - "0000100" and "100" would represent different paths in the tree
+    for bit in &felt.to_bits_be()[256 - length..] {
+        bits.push(*bit);
+    }
+
+    Path(bits)
 }
 
 fn path_to_felt(path: Path) -> Felt {
-    let mut arr = [0u8; 32];
-    let slice = &mut BitSlice::from_slice_mut(&mut arr)[5..];
-    slice[..path.len()].copy_from_bitslice(&path);
-    Felt::from_bytes_be(&arr)
+    let mut bytes = [0u8; 32];
+    bytes.view_bits_mut()[256 - path.len()..].copy_from_bitslice(&path);
+    Felt::from_bytes_be(&bytes)
 }
 
 #[cfg(test)]
 mod tests {
-    use katana_primitives::felt;
+    use katana_trie::BitVec;
 
     use super::*;
 
-    // This test is assuming that the `path` field in `MerkleNode::Edge` is already a valid trie
-    // path value.
+    // Test cases taken from `bonsai-trie` crate
     #[rstest::rstest]
-    #[case(felt!("0x1234567890abcdef"))]
-    #[case(felt!("0xdeadbeef"))]
-    #[case(Felt::MAX)]
-    #[case(Felt::ZERO)]
-    fn test_path_felt_roundtrip(#[case] path_in_felt: Felt) {
-        let initial_path = felt_to_path(path_in_felt);
-
-        let converted_felt = path_to_felt(initial_path.clone());
-        let path = felt_to_path(converted_felt);
-        assert_eq!(initial_path, path);
+    #[case(&[0b10101010, 0b10101010])]
+    #[case(&[])]
+    #[case(&[0b10101010])]
+    #[case(&[0b00000000])]
+    #[case(&[0b11111111])]
+    #[case(&[0b11111111, 0b00000000, 0b10101010, 0b10101010, 0b11111111, 0b00000000, 0b10101010, 0b10101010, 0b11111111, 0b00000000, 0b10101010, 0b10101010])]
+    fn path_felt_rt(#[case] input: &[u8]) {
+        let path = Path(BitVec::from_slice(input));
+
+        let converted_felt = path_to_felt(path.clone());
+        let converted_path = felt_to_path(converted_felt, path.len() as u8);
+
+        assert_eq!(path, converted_path);
+        assert_eq!(path.len(), converted_path.len());
     }
 }

crates/katana/rpc/rpc/Cargo.toml

@@ -7,11 +7,6 @@ repository.workspace = true
 version.workspace = true
 
 [dependencies]
-anyhow.workspace = true
-dojo-metrics.workspace = true
-futures.workspace = true
-http.workspace = true
-jsonrpsee = { workspace = true, features = [ "server" ] }
 katana-core.workspace = true
 katana-executor.workspace = true
 katana-pool.workspace = true
@@ -21,6 +16,12 @@ katana-rpc-api.workspace = true
 katana-rpc-types.workspace = true
 katana-rpc-types-builder.workspace = true
 katana-tasks.workspace = true
+
+anyhow.workspace = true
+dojo-metrics.workspace = true
+futures.workspace = true
+http.workspace = true
+jsonrpsee = { workspace = true, features = [ "server" ] }
 metrics.workspace = true
 serde_json.workspace = true
 starknet.workspace = true
@@ -32,6 +33,11 @@ tracing.workspace = true
 url.workspace = true
 
 [dev-dependencies]
+katana-cairo.workspace = true
+katana-node.workspace = true
+katana-rpc-api = { workspace = true, features = [ "client" ] }
+katana-trie.workspace = true
+
 alloy = { git = "https://github.com/alloy-rs/alloy", features = [ "contract", "network", "node-bindings", "provider-http", "providers", "signer-local" ] }
 alloy-primitives = { workspace = true, features = [ "serde" ] }
 assert_matches.workspace = true
@@ -40,10 +46,6 @@ dojo-test-utils.workspace = true
 dojo-utils.workspace = true
 indexmap.workspace = true
 jsonrpsee = { workspace = true, features = [ "client" ] }
-katana-cairo.workspace = true
-katana-node.workspace = true
-katana-rpc-api = { workspace = true, features = [ "client" ] }
-katana-trie.workspace = true
 num-traits.workspace = true
 rand.workspace = true
 rstest.workspace = true

crates/katana/rpc/rpc/tests/proofs.rs

@@ -6,17 +6,15 @@ use jsonrpsee::http_client::HttpClientBuilder;
 use katana_node::config::rpc::DEFAULT_RPC_MAX_PROOF_KEYS;
 use katana_node::config::SequencingConfig;
 use katana_primitives::block::BlockIdOrTag;
-use katana_primitives::class::ClassHash;
-use katana_primitives::hash::StarkHash;
-use katana_primitives::{hash, Felt};
+use katana_primitives::class::{ClassHash, CompiledClassHash};
+use katana_primitives::Felt;
 use katana_rpc_api::starknet::StarknetApiClient;
-use katana_rpc_types::trie::GetStorageProofResponse;
-use katana_trie::bitvec::view::AsBits;
-use katana_trie::bonsai::BitVec;
-use katana_trie::MultiProof;
-use starknet::accounts::Account;
+use katana_trie::{compute_classes_trie_value, ClassesMultiProof, MultiProof};
+use starknet::accounts::{Account, ConnectedAccount, SingleOwnerAccount};
 use starknet::core::types::BlockTag;
-use starknet::macros::short_string;
+use starknet::providers::jsonrpc::HttpTransport;
+use starknet::providers::JsonRpcClient;
+use starknet::signers::LocalWallet;
 
 mod common;
 
@@ -74,14 +72,96 @@ async fn proofs_limit() {
 
 #[tokio::test]
 async fn classes_proofs() {
-    let sequencer =
-        TestSequencer::start(get_default_test_config(SequencingConfig::default())).await;
+    let cfg = get_default_test_config(SequencingConfig::default());
 
-    let provider = sequencer.provider();
+    let sequencer = TestSequencer::start(cfg).await;
     let account = sequencer.account();
 
-    let path: PathBuf = PathBuf::from("tests/test_data/cairo1_contract.json");
-    let (contract, compiled_class_hash) = common::prepare_contract_declaration_params(&path)
+    let (class_hash1, compiled_class_hash1) =
+        declare(&account, "tests/test_data/cairo1_contract.json").await;
+    let (class_hash2, compiled_class_hash2) =
+        declare(&account, "tests/test_data/cairo_l1_msg_contract.json").await;
+    let (class_hash3, compiled_class_hash3) =
+        declare(&account, "tests/test_data/test_sierra_contract.json").await;
+
+    // We need to use the jsonrpsee client because `starknet-rs` doesn't yet support RPC 0.8.0
+    let client = HttpClientBuilder::default().build(sequencer.url()).unwrap();
+
+    {
+        let class_hash = class_hash1;
+        let trie_entry = compute_classes_trie_value(compiled_class_hash1);
+
+        let proofs = client
+            .get_storage_proof(BlockIdOrTag::Number(1), Some(vec![class_hash]), None, None)
+            .await
+            .expect("failed to get storage proof");
+
+        let results = ClassesMultiProof::from(MultiProof::from(proofs.classes_proof.nodes))
+            .verify(proofs.global_roots.classes_tree_root, vec![class_hash]);
+
+        assert_eq!(vec![trie_entry], results);
+    }
+
+    {
+        let class_hash = class_hash2;
+        let trie_entry = compute_classes_trie_value(compiled_class_hash2);
+
+        let proofs = client
+            .get_storage_proof(BlockIdOrTag::Number(2), Some(vec![class_hash]), None, None)
+            .await
+            .expect("failed to get storage proof");
+
+        let results = ClassesMultiProof::from(MultiProof::from(proofs.classes_proof.nodes))
+            .verify(proofs.global_roots.classes_tree_root, vec![class_hash]);
+
+        assert_eq!(vec![trie_entry], results);
+    }
+
+    {
+        let class_hash = class_hash3;
+        let trie_entry = compute_classes_trie_value(compiled_class_hash3);
+
+        let proofs = client
+            .get_storage_proof(BlockIdOrTag::Number(3), Some(vec![class_hash]), None, None)
+            .await
+            .expect("failed to get storage proof");
+
+        let results = ClassesMultiProof::from(MultiProof::from(proofs.classes_proof.nodes))
+            .verify(proofs.global_roots.classes_tree_root, vec![class_hash]);
+
+        assert_eq!(vec![trie_entry], results);
+    }
+
+    {
+        let class_hashes = vec![class_hash1, class_hash2, class_hash3];
+        let trie_entries = vec![
+            compute_classes_trie_value(compiled_class_hash1),
+            compute_classes_trie_value(compiled_class_hash2),
+            compute_classes_trie_value(compiled_class_hash3),
+        ];
+
+        let proofs = client
+            .get_storage_proof(
+                BlockIdOrTag::Tag(BlockTag::Latest),
+                Some(class_hashes.clone()),
+                None,
+                None,
+            )
+            .await
+            .expect("failed to get storage proof");
+
+        let results = ClassesMultiProof::from(MultiProof::from(proofs.classes_proof.nodes))
+            .verify(proofs.global_roots.classes_tree_root, class_hashes.clone());
+
+        assert_eq!(trie_entries, results);
+    }
+}
+
+async fn declare(
+    account: &SingleOwnerAccount<JsonRpcClient<HttpTransport>, LocalWallet>,
+    path: impl Into<PathBuf>,
+) -> (ClassHash, CompiledClassHash) {
+    let (contract, compiled_class_hash) = common::prepare_contract_declaration_params(&path.into())
         .expect("failed to prepare class declaration params");
 
     let class_hash = contract.class_hash();
@@ -91,29 +171,9 @@ async fn classes_proofs() {
         .await
         .expect("failed to send declare tx");
 
-    dojo_utils::TransactionWaiter::new(res.transaction_hash, &provider)
+    dojo_utils::TransactionWaiter::new(res.transaction_hash, account.provider())
         .await
         .expect("failed to wait on tx");
 
-    // We need to use the jsonrpsee client because `starknet-rs` doesn't yet support RPC 0.8.0
-    let client = HttpClientBuilder::default().build(sequencer.url()).unwrap();
-
-    let GetStorageProofResponse { global_roots, classes_proof, .. } = client
-        .get_storage_proof(BlockIdOrTag::Tag(BlockTag::Latest), Some(vec![class_hash]), None, None)
-        .await
-        .expect("failed to get storage proof");
-
-    let key: BitVec = class_hash.to_bytes_be().as_bits()[5..].to_owned();
-    let value =
-        hash::Poseidon::hash(&short_string!("CONTRACT_CLASS_LEAF_V0"), &compiled_class_hash);
-
-    let classes_proof = MultiProof::from(classes_proof.nodes);
-
-    // the returned data is the list of values corresponds to the [key]
-    let results = classes_proof
-        .verify_proof::<hash::Pedersen>(global_roots.classes_tree_root, [key], 251)
-        .collect::<Result<Vec<_>, _>>()
-        .expect("failed to verify proofs");
-
-    assert_eq!(vec![value], results);
+    (class_hash, compiled_class_hash)
 }

crates/katana/rpc/rpc/tests/test_data/test_sierra_contract.json

@@ -0,0 +1 @@
+../../../../contracts/build/account_with_dummy_validate.sierra.json

crates/katana/trie/src/classes.rs

@@ -8,11 +8,32 @@ use starknet_types_core::hash::{Poseidon, StarkHash};
 
 use crate::id::CommitId;
 
+#[derive(Debug)]
+pub struct ClassesMultiProof(pub MultiProof);
+
+impl ClassesMultiProof {
+    // TODO: maybe perform results check in this method as well. make it accept the compiled class
+    // hashes
+    pub fn verify(&self, root: Felt, class_hashes: Vec<ClassHash>) -> Vec<Felt> {
+        crate::verify_proof::<Pedersen>(&self.0, root, class_hashes)
+    }
+}
+
+impl From<MultiProof> for ClassesMultiProof {
+    fn from(value: MultiProof) -> Self {
+        Self(value)
+    }
+}
+
 #[derive(Debug)]
 pub struct ClassesTrie<DB: BonsaiDatabase> {
     trie: crate::BonsaiTrie<DB, Pedersen>,
 }
 
+/////////////////////////////////////////////////////
+// 	ClassesTrie implementations
+/////////////////////////////////////////////////////
+
 impl<DB: BonsaiDatabase> ClassesTrie<DB> {
     const BONSAI_IDENTIFIER: &'static [u8] = b"classes";
 
@@ -34,13 +55,17 @@ where
     DB: BonsaiDatabase + BonsaiPersistentDatabase<CommitId>,
 {
     pub fn insert(&mut self, hash: ClassHash, compiled_hash: CompiledClassHash) {
-        // https://docs.starknet.io/architecture-and-concepts/network-architecture/starknet-state/#classes_trie
-        const CONTRACT_CLASS_LEAF_V0: Felt = short_string!("CONTRACT_CLASS_LEAF_V0");
-        let value = Poseidon::hash(&CONTRACT_CLASS_LEAF_V0, &compiled_hash);
+        let value = compute_classes_trie_value(compiled_hash);
         self.trie.insert(Self::BONSAI_IDENTIFIER, hash, value)
     }
 
     pub fn commit(&mut self, block: BlockNumber) {
         self.trie.commit(block.into())
     }
 }
+
+pub fn compute_classes_trie_value(compiled_class_hash: CompiledClassHash) -> Felt {
+    // https://docs.starknet.io/architecture-and-concepts/network-architecture/starknet-state/#classes_trie
+    const CONTRACT_CLASS_LEAF_V0: Felt = short_string!("CONTRACT_CLASS_LEAF_V0");
+    Poseidon::hash(&CONTRACT_CLASS_LEAF_V0, &compiled_class_hash)
+}