# Internal Secure Block Building (SBB)

The **Secure Block Builder (SBB)** by Radius is designed to **ensure liveness for rollups** while leveraging the **security of restaking protocols**. It consists of several key components that work together to maintain network integrity and secure transaction processing.

#### **Secure Block Builder (SBB) by Radius**

The **Secure Block Builder (SBB)** is Radius's solution for ensuring **liveness for rollups** while leveraging the **security of restaking protocols**. It consists of several key components that work together to provide efficient block production and secure transaction handling.

* **Seeder**
  * The **Seeder** manages the **IP addresses of tx. orderers and rollups**. It verifies nodes by referencing blockchain smart contract data and stores the **IP addresses** of verified nodes, ensuring seamless communication within the network.
* **Secure RPC** 
  * The **Secure RPC framework** is designed to **protect sensitive transaction data** within a blockchain or rollup environment. Its primary goal is to ensure that transactions are encrypted after leaving the client environment, preserving data integrity and security throughout the broadcasting process. 
* **Distributed Key Generation Service (DKG)**
  * The **DKG service** is a crucial component of Radius's **SKDE encryption method**. Each node generates a **partial key**, which is then combined to create an **aggregated encryption key**. A **delay function** is applied to generate the **decryption key**.
  * **Users receive an encryption key** from DKG to encrypt transactions.
  * **Tx. orderers obtain a decryption key** to process and execute transactions securely.
* **Liveness Service Manager Contract (`LivenessServiceManager.sol`)**

  <figure><img src="/files/7KSXphHydZCRwd9gNdpT" alt=""><figcaption><p>Relationship between LivenessServiceManager related entities</p></figcaption></figure>

  * The **LivenessServiceManager contract** ensures **tx. orderer availability**. It helps rollups and tx. orderer sets **determine the leader tx. orderer**, allowing for **block creation and transaction ordering**. Within the above structure, a **cluster** consists of both a **tx. orderer set** and a **rollup set.** The **tx. orderer set** manages all registered rollups within the cluster. Each **rollup stores the addresses of executors**, responsible for its operation, and is registered with specific enabled features provided by Radius.
    * **Additional Rollup Configurations:**
      * **`rollupType`**: Determines the **block creation mechanism**, based on the transaction list provided by the tx. orderer. Supported options include **`polygon_cdk`**.
      * **`encryptedTransactionType`**: Defines the encryption method used, with **PVDE and SKDE** offered by Radius.
      * **`ValidationInfo`**: Contains **protocol details for re-staking**, specifying:
        * **`platform`**: The blockchain where the validation contract is deployed.
        * **`serviceProvider`**: The specific re-staking service used (**EigenLayer or Symbiotic**).
* **Validation Service Manager Contract (`ValidationServiceManager.sol`)**
  * The **ValidationServiceManager contract** integrates with **restaking protocols** like **Symbiotic**. It facilitates **tx. orderer validation and reward distribution** through the following process:
    1. The **leader tx. orderer** submits **block commitment information** by creating a task using `createTask`.
    2. **Follower tx. orderers** participate in validation by responding to the task with `respondToTask`.
    3. Once validation is complete, the contract **allocates rewards or applies slashing** based on operator performance.

These components work together to provide a **decentralized, secure, and restaking-enabled rollup infrastructure**.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.theradius.xyz/overview/internal-secure-block-building-sbb.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.