# Architecture of The Adventure Layer

## The Adventure Layer as an Optimistic Rollup

**The Adventure Layer** is built upon an optimistic rollup framework chosen for its efficiency and compatibility with other rollups. This layer serves as the base where transactions are batched and executed off-chain, with final state commitments made on the data availability layer. 

## Validator Dynamics within The Adventure Layer

Validators validate both L2 and the shards for **The Adventure Layer**:

* **Validating L2**: Validators validate the transactions and state transitions on the L2 optimistic rollup.
* **Validating Shards**: Validators validate the transactions within local shards.

The integrity of this dual-validation mechanism is maintained through a rigorous incentive system:

* **Rewards**: Validators receive rewards for each successful validation, encouraging them to accurately process transactions and state transitions.
* **Slashing**: Validators stand to lose a portion of their staked tokens if they fail to correctly validate either the L2 or any of the localized shards, ensuring a high degree of accountability.

## Shard-Sharing State: A Novel EVM Sharding Infrastructure

**The Adventure Layer** introduces the **Shard-Sharing State** to overcome traditional challenges with sharding, such as interoperability and state consistency. This innovative sharding infrastructure is native to **the Adventure Layer** L2 but facilitates seamless read/write operations across both the L2 and individual shards. The Shard-Sharing State significantly enhances interoperability and allows for efficient state management across the network.

## Data Availability and State Settlement

Shards within **The Adventure Layer** utilize blob storage for data availability (DA), ensuring data integrity and accessibility with minimal gas costs. Each shard's state root is committed to **the Adventure Layer** L2, using the optimistic rollup mechanism. This approach not only secures the data but also aligns it with the overall state of the network, maintaining coherence and reliability.