Fix the blobs assertion

packages/cli/test/utils/simulation/assertions/blobsAssertion.ts

@@ -7,7 +7,7 @@ import {generateBlobsForTransaction} from "../utils/blobs.js";
 import {BlobsEIP4844Transaction} from "../web3js/blobsEIP4844Transaction.js";
 
 const numberOfBlobs = 6;
-const sentBlobs: string[] = [];
+const sentBlobs: Uint8Array[] = [];
 
 export function createBlobsAssertion(
   nodes: NodePair[],
@@ -46,7 +46,8 @@ export function createBlobsAssertion(
         });
         const signedTx = tx.sign(fromHex(`0x${EL_GENESIS_SECRET_KEY}`));
         await node.execution.provider?.extended.sendRawTransaction(toHex(signedTx.serialize()));
-        sentBlobs.push(...blobs.map((b) => toHex(b)));
+
+        sentBlobs.push(...blobs.map((b) => fromHex(b)));
       }
 
       const blobSideCars = await node.beacon.api.beacon.getBlobSidecars(slot);
@@ -76,16 +77,29 @@ export function createBlobsAssertion(
 
       for (let i = 0; i < blobs.length; i++) {
         if (!Buffer.from(blobs[i]).equals(Buffer.from(sentBlobs[i]))) {
-          errors.push([
-            "Node does not have the right blobs",
-            {
-              expectedBlob: sentBlobs[i],
-              currentBlob: blobs[i],
-            },
-          ]);
+          errors.push(["Node does not have the correct blobs", {index: i}]);
         }
       }
       return errors;
     },
+
+    async dump({store, nodes}) {
+      const result: Record<string, string> = {
+        "expectedBlobs.txt": sentBlobs.map(toHex).join("\n"),
+      };
+
+      for (const node of nodes) {
+        const blobs: Uint8Array[] = [];
+        for (let slot = sendBlobsAtSlot; slot <= validateBlobsAt; slot++) {
+          if (store[node.beacon.id] !== undefined) {
+            blobs.push(...(store[node.beacon.id][slot] ?? []));
+          }
+        }
+
+        result[`blobs-${node.beacon.id}.txt`] = blobs.map(toHex).join("\n");
+      }
+
+      return result;
+    },
   };
 }