rollup ecosystem

The **rollup ecosystem** refers to the network of technologies, projects, and infrastructure built around *rollups*—a type of blockchain scaling solution, primarily for Ethereum, that processes transactions off-chain (or on a separate layer) and then posts compressed transaction data back to the main chain for security and verification.

This ecosystem includes:
- **Rollup frameworks and protocols** (e.g., Optimistic Rollups, Zero-Knowledge Rollups)
- **Rollup networks or chains** (such as Arbitrum, Optimism, zkSync, Starknet, etc.)
- **Developer tools and infrastructure** supporting rollup deployment and operation
- **Applications and projects** that run on rollup-based networks

Overall, the rollup ecosystem enables higher throughput, lower transaction costs, and scalability while still leveraging the security of the underlying base layer (e.g., Ethereum).