public Bytes32 getKeyHash() {
    return keyHash;
  }
The hash of the storage key. When inserting storage entries the hash of the original key is
used as the key. When iterating over values in the storage trie, only the hashedKey and value
are available.

@return The hash of the storage key.
evm/src/main/java/org/hyperledger/besu/evm/account/AccountStorageEntry.java