add clippy rule to disable multihash_codetable::Code

.clippy.toml

@@ -20,6 +20,10 @@ path = "std::sync::Mutex"
 reason = """the standard library synchronization primitives are poisoned when aquiring threads panic.
 use parking_lot::Mutex instead to silently ignore panics."""
 
+[[disallowed-types]]
+path = "multihash_codetable::Code"
+reason = """use `crate::utils::multihash::MultihashCode` instead which has `Identity` code back-filled."""
+
 [[disallowed-methods]]
 path = "tempfile::NamedTempFile::new"
 reason = """The temporary files created by this method are not persistable if the temporary directory lives on a different filesystem than the target directory. While it is valid in other contexts (if not persisting files), it was misused many times and so we are banning it. Consider using `tempfile::NamedTempFile::new_in` or `tempfile::NamedTempFile::Builder"""

src/utils/db/mod.rs

@@ -10,13 +10,15 @@ use cid::Cid;
 use fvm_ipld_blockstore::Blockstore;
 use fvm_ipld_encoding::CborStore;
 use fvm_ipld_encoding::{to_vec, DAG_CBOR};
+#[allow(clippy::disallowed_types)]
 use multihash_codetable::Code;
 
 use serde::ser::Serialize;
 
 /// Extension methods for inserting and retrieving IPLD data with CIDs
 pub trait BlockstoreExt: Blockstore {
     /// Batch put CBOR objects into block store and returns vector of CIDs
+    #[allow(clippy::disallowed_types)]
     fn bulk_put<'a, S, V>(&self, values: V, code: Code) -> anyhow::Result<Vec<Cid>>
     where
         Self: Sized,
@@ -59,6 +61,7 @@ pub trait CborStoreExt: CborStore {
     /// mhType := uint64(mh.BLAKE2B_MIN + 31)
     /// // 45569 + 31 = 45600 = 0xb220
     /// ```
+    #[allow(clippy::disallowed_types)]
     fn default_code() -> Code {
         Code::Blake2b256
     }