> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Optimized Submission

> Enable Optimized Submission on your Chainstack Arbitrum, Base, Arc, and Robinhood Chain nodes to route transactions through a private, optimized path for faster inclusion.

Optimized Submission is a Marketplace [add-on](/docs/add-ons) you manage from your node's **Add-ons** tab. It routes your transactions through a private, optimized path designed to reduce inclusion delays. It applies to L2 sequencer chains, where transactions are not broadcast to a public mempool.

It is available on these networks and node types:

| Network | Node types |
| - | - |
| Arbitrum Mainnet | [Global Nodes](/docs/global-elastic-node), [Trader Nodes](/docs/trader-node) |
| Base Mainnet | Global Nodes, Trader Nodes |
| Arc Mainnet | Global Nodes |
| Robinhood Chain Mainnet | Global Nodes |

On Global Nodes, Optimized Submission is available on every plan, including the Developer plan.

On Ethereum and BNB Smart Chain, which have a public mempool where front-running is possible, use [MEV protection](/docs/mev-protection) instead.

### How it works

1. You construct and sign your transaction as usual and send it through your Chainstack endpoint as `eth_sendRawTransaction`.
2. Instead of the default node route, it is routed through a private, optimized submission path.
3. Once included in a block, it appears on-chain as normal, and you can retrieve it with the regular methods such as [eth\_getTransactionByHash](/reference/arbitrum-gettransactionbyhash).

### Managing Optimized Submission

Optimized Submission is off on a new node until you enable it. The node's **Add-ons** tab shows whether it is on: its card shows **Active** with a **Disable** button when it is enabled, and **Enable** when it is not.

To enable Optimized Submission, open your node on Chainstack, select the **Add-ons** tab, click **Enable** on the **Optimized Submission** card, and complete the install. See [Install a node add-on](/docs/add-ons#install-a-node-add-on).

To use the standard node route, click **Disable** on the **Optimized Submission** card. You can enable it again from the same tab.