The Next Era of L2s: Scalable zkRollups with Polygon CDK & Zeeve RaaS

1. The Next Era of L2s Scalable zkRollups with Polygon CDK and Zeeve RaaS

2. The Gap in Scaling Solutions and Ground for ZK Rollups • High gas fees on Layer 1 chains like Ethereum: zk rollups can provide much cheaper transactions due to mass transaction processing off-chain. • Limited scalability of Layer 1 chains in terms of TPS:zk rollups can currently achieve over 2000 TPS theoretical throughput. • Privacy limitations on Layer 1 and Layer 2 chains: zk rollups enable private transactions using zero-knowledge proofs. • Lack of flexible Layer 2 solutions: Many existing solutions, like state channels and side chains, have either customizability or security issues or are not cost-effective. zk rollups are more flexible. • Limitations of optimistic rollups due to fraud proofs: zk rollups have instant transaction finality due to validity proofs. • Lack of support for complex smart contract logic on some Layer 2s - zkEVM will enable this on zk rollups. • Interoperability challenges across Layer 2s: zk rollups combined with bridges can provide seamless interoperability.

3. Introducing Polygon CDK as the Enabler of Customized zkRollup • Polygon CDK (Chain Development Kit) makes it easy for developers to design and launch zero-knowledge (ZK) L2s on Ethereum, on demand. • It aims to give developers the power to choose VM (zkEVM, Miden VM, etc.), sequencer types (Centralized, decentralized), gas tokens, and data availability solutions. • The core value props of Polygon CDK are: • ZK security:ZK proofs cannot be generated for an invalid state transition, which means secure bridging between Ethereum and Polygon CDK chains with no 7-day withdrawal delay. • Full sovereignty & customizability: Full design control by developers over appchains built with Polygon CDK, including governance and other configurations. Regardless of the use case or project, developers building with Polygon CDK may use any part of the stack they want and none of the parts they don’t. • Future interoperability:A unified LxLy bridge and interop layer will eventually allow all CDK-deployed chains to be interoperable. This will create a unified ecosystem with atomic L2<>L2 transactions that can occur nearly instantly. • Ethereum liquidity: Leverage ZK tech to tap Ethereum liquidity.

4. Polygon CDK Architecture Deep Dive • The current version of Polygon CDK is optimal for existing EVM-based dApps that need the flexibility of an appchain and don’t require permissioned features. • Today, there are two available configurations with Polygon CDK: Rollup mode and Validium mode. Rollup Mode Validium Mode • Fast settlement. Transaction data is posted to Ethereum, which means greater security but slightly higher fees than with a validium. • A good choice for appchains that want to provide high-value users with the strongest security guarantees or users who want visibility into what’s occurring on-chain. • Great for public general-purpose chains, blue-chip DeFi, etc. • Fast and cheap settlement. Transaction data is stored off-chain, reducing the costs of posting calldata to Ethereum. • A good choice for appchains with high-throughput activity. • Customizable DAC: Build your own data availability committee (DAC) to store transaction data. • Great for gaming, social apps, etc.

5. Different Components of a CDK Rollup (I/II) • DA, DAC, 3P DA: • In the context of L2 solutions, Data Availability refers to the assurance that the transaction data is accessible, especially in case of disputes or malfunctions. • For L2 solutions, a common practice to ensure data availability is posting transaction data to Ethereum as CALLDATA. • DACs are groups of permissioned nodes that attest to the availability of transaction data needed to reconstruct the state of the L2. They are particularly used in validium mode, where transaction data is stored off-chain to reduce costs. • 3rd Party DA also can be used like Celestia, NEAR DA, Avail, etc. • Sequencer: • The Sequencer is responsible for executing, ordering, and batching transactions. It plays a key role in ensuring the integrity and finality of transactions in the L2 network. • Currently, centralized but decentralized/shared sequencers will be supported in the coming upgrade. Like Espresso, Radius, etc. • Prover: • The Prover's primary function is to generate proofs for batched transactions. These cryptographic proofs are crucial for validating transactions on the Ethereum mainnet. • It focuses on creating ZK proofs efficiently, using parallel computing for speed, and formatting these proofs for Ethereum mainnet compatibility​

6. Different Components of a CDK Rollup (II/II) • Synchronizer: • Keeps the node’s local state in sync with the Ethereum mainnet by monitoring events and updating the local state accordingly.

7. Let's Talk Numbers: Traction Data for CDK • Polygon CDK is getting adopted massively within Web3 builders, with 20+ CDK chains already announced. • Immutable • OKX • Near • Astar • Canto • Gnosis Pay • Palm Network • Aavegotchi • CapX • WireX • IDEX • Nubank • Nexon • GameSwift • Powerloom • Manta Network • Reya Network • As Match One of their most recent partnership is with Flipkart for their fire drops: They will use Polygon CDK for launching an Ethereum ZK L2 for its Firedrops: a web3 loyalty program. Features include rewards like mystery boxes and digital coupons. This is important for the Web3 ecosystem in India. It not only has the potential to attract the top fintech entrepreneurs in India to build Web3 but also might encourage many other top enterprise and consumer brands to build their Appchains.

8. Example Use Case 1: DeFi Canto: Canto is building with Polygon Labs to migrate to a ZK L2 on Ethereum– powered by Polygon Chain Development Kit (CDK). This ZK chain will be dedicated to Real World Assets to support the next wave of application-layer adoption via neofinance. Reya Network:Reya is utilizing Polygon CDK to integrate the best parts of CeFi & DeFi seamlessly. Reya Network will benefit from enhanced capital efficiency & liquidity, reduced execution risks, and improved throughput. Combined with the off-chain speed and user experience of Reya exchange, you have Ce-DeFi. IDEX: IDEX has created XCHAIN, a zkEVM Layer 2 network that will allow us to achieve UX and cost parity with CEXs without sacrificing security. XCHAIN will serve as the backbone of IDEX’s perpetual futures exchange, enabling traders to finally have performance and security with complete self-custody.

9. Example Use Case 2: Gaming Immutable: Running currently on Starknet Engine, Immutable is being built using the Polygon ZK Tech stack. The integration of Immutable zkEVM, powered by Polygon CDK, pushes the boundaries of scalability without compromising on security. Gameswift: GameSwift evolved from a single game into a huge gaming infrastructure leveraging Polygon’s ZK technology. They have launched their own modular chain powered by CDK. Dogechain: This chain aims to bring Gaming and NFTs to this meme coin users. Dogechain has gone live with the governance proposal vote to migrate Dogechain from PoS blockchain to Polygon CDK. This will enable the chain to leverage the power of zkEVM. Aavegotchi: Originally created as on-chain 2D Pixel art, Aavegotchi is now transitioning to full metaverse, AR, VR ready. They are launching ‘Gotchi Chain’ using Polygon CDK.

10. Example Use Case 3: Payments/Rewards Fuse Networks:They are a business and consumer-friendly blockchain ecosystem for mainstream adoption of web3 payments. With Polygon CDK, they are deploying a ZK Rollup on existing L1 infrastructure, enabling enhanced transaction processing and efficiency. This will revolutionize Web3 payments by creating a network that offers low transaction costs, instant clearing, high throughput, and a decentralized validator set. WireX: Wirex is a global leader in enabling crypto payments and is now using Polygon CDK to build an application-specific blockchain focused on handling just the payments. Wirex’s initial use cases for the CDK chain will be non-custodial visa cards integrated with the Account Abstraction (AA) feature. Gnosis Pay:Gnosis DAO has announced the launch of Gnosis Pay, a decentralized payment network powered byPolygon zkEVM and CDK. This enables devs to integrate traditional payment methods with web3, and users can spend digital assets directly from their wallets using a Visa debit card.

11. What's coming out as a trend? Who should launch their own zkRollup? To recap ZK Rollup’s Value prop: • Very high security, provided by base blockchain and ZK technology • Customization of chain configurations • Better TPS than single-threaded L1s • Reasonable cost Emerging Trends with ZK Rollups: • NFTs, Gaming, and Metaverse projects, like Palm Network, Aavegotchi, Gameswift, etc • Payment Solutions: Gnosis Pay, Wirex • Loyalty Programs: Flipkart’s Fire drop, • Blue chip DeFi and DEX protocols: • Sector-specific L1 Chains, like NuBank • General Purpose Blockchains Built with ZK technology: Manta, Astar Network, OKX’s X1 Chain, Celo, etc.

12. The Value Proposition of a RaaS Platform 1 RaaS provides a faster and easier deployment process through its no-code deployment panel. You can deploy a rollup chain in minutes with default configurations rather than having to code everything from scratch. RaaS abstracts away complexities like managing a production-grade infrastructure, hosting, configuration, integration of components, etc. so developers can focus on their application logic. With SDKs, the developers would have to handle ongoing management themselves. RaaS platforms tend to be more modular, allowing integration options for third-party rollup services like decentralized sequencers, account abstraction layers, data availability solutions, decentralized oracles, etc., to add modularity. RaaS offers standardization so developers with less blockchain expertise can still deploy rollups. The default configurations provide a good starting point. RaaS includes monitoring, alerts, and an interactive management dashboard deployed in rollup networks. With SDKs, the developers would have to handle ongoing management themselves. RaaS solutions are maintained and developed by dedicated platform teams. Bug fixes, upgrades, new features etc., are handled by the platform. With SDKs, developers have to handle all ongoing improvements. RaaS platforms provide expert consultation to help projects make the right decisions in choosing frameworks, components, and configurations for their specific use case. This decision support can be very valuable. 2 3 4 5 6 7 8

13. Walkthrough of building a simple zkRollup with Polygon CDK Sandbox on Zeeve Video

14. The Value Add of Zeeve RaaS in One Slide Build Optimistic and ZK Rollups:Zeeve supports OP Stack, Arbitrum Orbit, Polygon CDK, and zkStack frameworks for its RaaS. Build both Smart contract and sovereign rollup chains as needed for your application. 1-click Sandbox:Get the benefit of 1-click Sandbox for your application-specific chain deployment. Test in DevNet with multiple configurations before moving to Testnet/mainnet. Official Implementation Partner:Zeeve is the official implementation partner for Polygon CDK and zkSync Hyperchains, ensuring a flawless deployment. Integration Partners: Leverage Zeeve’s integration partnersto make your rollup stack as modular as you need. Get customized sequencer type, DA Layer, decentralized oracles, Account Abstraction partner, Interoperability layer, etc. Enterprise-grade security:Zeeve is an ISO, SOC2 TypeII, and GDPR-compliant platform, taking care of the security and compliance needs of web2 and web3 enterprises. RPC APIs and Staking Infrastructure: Experience enterprise-grade nodes and RPC API infrastructure featuring load balancing, scalability, top-tier security, and cost-optimized peak performance. White-labeled Block Explorer: Get a white-labeled Block Explorer or integrate a 3rd-party one for comprehensive transaction data and rich queries powered by a robust data indexing protocol. Data Indexing Protocol: Unlock real-time access to the Ledger and Smart Contract data with our seamless integration of Subgraphs and Subquery projects powered by dedicated indexers and APIs. 24x7 Monitoring and Enterprise SLA: We monitor your Rollup Chain 24x7x365 to guarantee 99.99% uptime, optimized performance, and scalability. You can put your mind to rest with our Enterprise SLA. Migration Assistance: Zeeve provides an expert team of Rollups and DevOps engineers to support you in migrating to the Rollup infrastructure without any downtime or data loss.

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