Rollup teams gathered to discuss the progress in adding support for EIP-4844 data blobs, an integral part of Ethereum's rollup-centric roadmap. The goal is to reduce the cost of storing data on the Ethereum blockchain. Optimistic rollups are ahead in integration, while ZK rollups will take longer due to additional complexities. Some issues were highlighted, such as the lack of tooling for data blobs and API difficulties. Long-term, full Danksharding will resolve these issues. Rollup teams will support both blobs and calldata, using the most cost-efficient option. Additionally, ensuring the availability of rollup historical data will be the responsibility of rollup teams or potentially centralized providers.
We're back with another writeup for the latest RollCall Breakout Room ☎️ Now that Dencun is live on Goerli, and with Sepolia and Holesky just around the corner, rollup teams gathered to discuss the progress being made by each team in adding support for EIP-4844 data blobs. For
Ether.fi Cash Vaults Hit $185M Milestone on Scroll

Ether.fi Cash vaults have reached a significant milestone with over $185M in deposits. The platform has processed more than 250,000 transactions totaling $25M+ on the Scroll network. - Users can make everyday purchases including groceries, flights, and cinema tickets - Transactions offer 2-5% cashback rewards - All transactions are settled on the Scroll network The platform continues to show strong growth, recently celebrating its 200,000th transaction milestone. Learn more about getting your own card at [Scroll Cash Card](https://scroll.link/cashcard)
From Med School Dropout to Web3 Builder: The Polystream Story
After leaving medical school and working through 10 different jobs, Gabe faced skepticism from family - including his crypto-averse mother - about his career choices. Undeterred, he founded Polystream to prove his doubters wrong. The platform, built on Scroll, represents a testament to persistence in the web3 space. - Founded by a non-traditional tech entrepreneur - Built despite family skepticism - Now available for testing Try Polystream: [Launch App](https://scroll.link/polystream)
Daimo Pay Launches on Scroll with Multi-Payment Options
**Daimo Pay** has gone live on Scroll, offering a streamlined onboarding experience with three flexible payment options: - Direct from CEXs (Binance, Coinbase) - Popular payment apps (Revolut, Venmo) - Cross-chain crypto payments (any token/chain) The platform emphasizes user-friendly onboarding and includes vibe coding optimization. Developers can explore integration details in their [technical documentation](https://paydocs.daimo.com). *For builders focused on user acquisition, Daimo's multi-payment approach demonstrates the importance of smooth onboarding experiences.*
Scroll Launches 7-Week Delegate Training Program

Scroll has launched a comprehensive Delegate Accelerator program to train the next generation of effective DAO delegates. The 7-week curriculum includes: - Interactive workshops - One-on-one mentorship with veteran delegates - Practical experience through mock voting - Skill-building through gamified challenges **Key Details:** - Application deadline: June 23rd - Program focus: DAO governance and delegation - Goal: Building the Open Economy [Apply for the program here](https://app.deform.cc/form/5e670c2f-179c-4041-a37c-037216e5b8c2/?page_number=0)
Tempest Finance Launches AI-Powered Vaults on Ambient Finance
Tempest Finance has launched AI-powered vaults on Ambient Finance, offering users simplified liquidity management through one-click optimization. The vaults are now natively deployed on the Scroll network. Key features: - Single-click liquidity management - AI-powered optimization - Native integration with Ambient's web frontend - Full deployment on Scroll network The integration streamlines DeFi operations for users seeking efficient portfolio management without complex manual adjustments.