Implement storage empty assertion (#134)

crates/node/src/kitchensink.rs

@@ -17,7 +17,7 @@ use alloy::{
     },
     primitives::{
         Address, B64, B256, BlockHash, BlockNumber, BlockTimestamp, Bloom, Bytes, FixedBytes,
-        TxHash, U256,
+        StorageKey, TxHash, U256,
     },
     providers::{
         Provider, ProviderBuilder,
@@ -25,7 +25,7 @@ use alloy::{
         fillers::{CachedNonceManager, ChainIdFiller, FillProvider, NonceFiller, TxFiller},
     },
     rpc::types::{
-        TransactionReceipt,
+        EIP1186AccountProofResponse, TransactionReceipt,
         eth::{Block, Header, Transaction},
         trace::geth::{DiffMode, GethDebugTracingOptions, PreStateConfig, PreStateFrame},
     },
@@ -437,6 +437,20 @@ impl EthereumNode for KitchensinkNode {
             .await
             .map_err(Into::into)
     }
+
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
+    async fn latest_state_proof(
+        &self,
+        address: Address,
+        keys: Vec<StorageKey>,
+    ) -> anyhow::Result<EIP1186AccountProofResponse> {
+        self.provider()
+            .await?
+            .get_proof(address, keys)
+            .latest()
+            .await
+            .map_err(Into::into)
+    }
 }
 
 impl ResolverApi for KitchensinkNode {