# Transaction Submission

## **How It Works**

* The Trader API broadcasts your transactions to multiple RPC endpoints, including self-hosted, external, and staked RPCs.
* Your service tier and submission parameters control how transactions are propagated.

## **Optimizing Transaction Submission**

1. **Priority Fee**:

   * Pay additional fees to Solana validators to prioritize your transactions.
   * Use the [**Priority Fee Stream**](https://docs.bloxroute.com/solana/trader-api/api-endpoints/core-endpoints/priority-fee) to get real-time market data and determine the optimal fee.

2. **Tips**:

Tips serve multiple purposes in transaction submission:

* F**ront-Running Protection:** When enabled (`frontRunningProtection=True`), the Trader API limits who receives the transaction to protect against front-running. This works alongside the `fastBestEffort` parameter:
  * `fastBestEffort=True`: Transactions are submitted to Jito as a bundle and to leaders identified as low-risk for front-running.
  * `fastBestEffort=False`: Transactions are submitted only to Jito, offering a balance of MEV protection and performance.
  * Note: While bloXroute uses best-effort methods to identify low-risk validators, there is no absolute guarantee against attacks.
* **Staked RPCs**: Enabling this parameter (`useStakedRPCs=True`) ensures your transaction is sent directly to the leader through a staked validator connection.
  * Requirements:

{% hint style="info" %}
Use the [**Bundle Tip Stream**](https://docs.bloxroute.com/solana/trader-api/api-endpoints/core-endpoints/getbundletipstream) to calculate appropriate tip amounts.
{% endhint %}

➡️ **Next Steps**: [Submit your first transaction](https://docs.bloxroute.com/solana/trader-api/api-endpoints/core-endpoints/submit) or learn more about [Front-Running Protection, Revert Protection, & Transaction Bundling](https://docs.bloxroute.com/solana/trader-api/quick-start/front-running-protection-and-transaction-bundle).