diff --git a/packages/data/getBlockByTimestamp.ts b/packages/data/getBlockByTimestamp.ts
new file mode 100644
index 00000000..d6662cd5
--- /dev/null
+++ b/packages/data/getBlockByTimestamp.ts
@@ -0,0 +1,79 @@
+// Example usage:
+// pnpm ts-node-dev getBlockByTimestamp.ts https://ethereum-rpc.publicnode.com 1722270000
+
+import { createPublicClient, http, Block, Chain } from 'viem';
+
+// Function to create a custom chain configuration
+function createCustomChain(rpcUrl: string): Chain {
+    return {
+        id: 0,
+        name: 'Custom',
+        rpcUrls: {
+            default: { http: [rpcUrl] },
+            public: { http: [rpcUrl] }
+        },
+        nativeCurrency: {
+            decimals: 18,
+            name: 'Ether',
+            symbol: 'ETH'
+        }
+    };
+}
+
+// Function to create a public client using the provided RPC URL
+function createClient(rpcUrl: string) {
+    const customChain = createCustomChain(rpcUrl);
+    return createPublicClient({
+        chain: customChain,
+        transport: http()
+    });
+}
+
+async function getBlockByTimestamp(client: ReturnType<typeof createClient>, timestamp: number): Promise<Block> {
+    // Get the latest block number
+    const latestBlockNumber = await client.getBlockNumber();
+    
+    // Get the latest block using the block number
+    const latestBlock = await client.getBlock({ blockNumber: latestBlockNumber });
+
+    // Initialize the binary search range
+    let low = 0n;
+    let high = latestBlock.number;
+    let closestBlock = latestBlock;
+
+    // Binary search for the block with the closest timestamp
+    while (low <= high) {
+        const mid = (low + high) / 2n;
+        const block = await client.getBlock({ blockNumber: mid });
+
+        if (block.timestamp < timestamp) {
+            low = mid + 1n;
+        } else {
+            high = mid - 1n;
+            closestBlock = block;
+        }
+    }
+
+    return closestBlock;
+}
+
+// Get the RPC URL and timestamp from the command line arguments
+const args = process.argv.slice(2);
+if (args.length !== 2) {
+    console.error('Please provide both an RPC URL and a timestamp as arguments.');
+    process.exit(1);
+}
+
+const rpcUrl = args[0];
+const timestamp = Number(args[1]);
+
+if (isNaN(timestamp)) {
+    console.error('Invalid timestamp provided. Please provide a valid number.');
+    process.exit(1);
+}
+
+const client = createClient(rpcUrl);
+
+getBlockByTimestamp(client, timestamp).then(block => {
+    console.log(`Block number corresponding to timestamp ${timestamp} is ${block.number?.toString()}`);
+}).catch(console.error);
\ No newline at end of file
diff --git a/packages/data/src/worker.ts b/packages/data/src/worker.ts
index e348df09..ff9db70c 100644
--- a/packages/data/src/worker.ts
+++ b/packages/data/src/worker.ts
@@ -80,7 +80,8 @@ if(process.argv.length < 3) {
 } else {
 const args = process.argv.slice(2);
 if (args[0] === 'index-sepolia') {
-  indexBaseFeePerGasRangeCommand(6300000, 6500000, 'https://ethereum-rpc.publicnode.com', `${sepolia.id}:${FoilSepolia.address}`)
+  // Index mainnet gas to sepolia contract
+  indexBaseFeePerGasRangeCommand(20413376, 20428947, 'https://ethereum-rpc.publicnode.com', `${sepolia.id}:${FoilSepolia.address}`)
   //indexMarketEventsRangeCommand(1722270000, 1722458027, 'https://ethereum-rpc.publicnode.com', FoilSepolia.address, FoilSepolia.abi as Abi)
 } else if (args[0] === 'index-base-fee-per-gas') {
   const [start, end, rpcUrl, contractAddress] = args.slice(1);