Bitcoin developer Burak is actively developing a new Bitcoin L2 "Brollup". The main goals and features of the project are as follows:

1. Goal: Brollup aims to introduce more DeFi (decentralized finance) use cases into the Bitcoin ecosystem. Burak expects that when it is finally released, Brollup will be able to support more than 90% of DeFi use cases, bringing more functionality and usage scenarios to Bitcoin.

2. Design features: Brollup uses Bitcoin's native rollup design. This means that without the need to hard fork Bitcoin or issue non-Bitcoin tokens, Brollup can bundle transactions, improve transaction efficiency and reduce fees.

3. Development stage: Currently, Brollup is still in the "design stage". According to Burak's plan, a signet (testnet) may be launched later this year for developers and early users to test and feedback.

4. Expected impact: With the launch of Brollup, we can foresee that it will have a positive impact on the Bitcoin ecosystem. By introducing more DeFi use cases, Brollup is expected to attract more developers and users to participate in the Bitcoin network, further promoting the popularity and application of Bitcoin.

Overall, Bitcoin developer Burak’s Brollup project is an innovative and promising project that will bring more functionality and vitality to the Bitcoin ecosystem.