expose method to rebuild internal state from fetched actions on an Of…

…fchainStateInstance

src/lib/mina/actions/offchain-state.ts

@@ -104,6 +104,11 @@ type OffchainStateInstance<
    * Commitments to the offchain state, to use in your onchain state.
    */
   commitments(): State<OffchainStateCommitments>;
+
+  /**
+   * Rebuilds the internal state map by fetching actions up to the current actionState in offchainStateCommitments
+   * */
+  fetchInternalState(): void;
 };
 
 type OffchainState<Config extends { [key: string]: OffchainStateKind }> = {
@@ -470,6 +475,17 @@ function OffchainState<
         return result.proof;
       },
 
+      async fetchInternalState() {
+        let actionState = await onchainActionState();
+        let { merkleMap, valueMap } = await fetchMerkleMap(
+          height,
+          internal.contract,
+          actionState
+        );
+        internal.merkleMap = merkleMap;
+        internal.valueMap = valueMap;
+      },
+
       async settle(
         proof: Proof<OffchainStateCommitments, OffchainStateCommitments>
       ) {