Rollups Study: Implementing Rollups on the Haqq Blockchain

What Are Rollups?

Rollups are a type of Layer 2 scaling solution for blockchain networks. In the case of the Haqq blockchain (L1), rollups execute transactions off-chain while recording just enough data on the Haqq blockchain to maintain transparency and security. This approach allows for faster and cheaper transactions while leveraging the security of Haqq.

Optimistic Rollups

• How They Work: Transactions are assumed valid off-chain, with verification only if disputed. A challenge period allows for fraud proofs to correct any invalid transactions.
• Pros: Easier to implement and can handle complex contracts, improving speed and reducing costs.
• Cons: Finalizing transactions can take days due to the challenge period.

ZK Rollups

• How They Work: ZK Rollups use cryptographic proofs to verify transactions off-chain, then post the proof on-chain to confirm validity.
• Pros: Provides faster finality and stronger security with instant verification.
• Cons: More complex and resource-intensive to implement.

Token Integration Options for Rollups

Rollups can use ISLM, the native token of the Haqq blockchain (L1), for transactions, ensuring smooth integration with the main chain. Alternatively, a custom native token, such as Falcon or HCC, can be developed specifically for our rollup, offering additional flexibility and control within the Layer 2 environment.

Different Ways to Implement Rollups

Rollups-as-a-Service (RaaS) Platforms

1. OP Stack (Optimism SDK) – Optimistic Rollup
   • Key Steps:
     1. Choose a Base Chain: Set Haqq as the base chain.
     2. Set Up Sequencer and Validators.
     3. Integrate Data Availability.
     4. Implement Dispute Resolution.
     5. Build a Bridge.
     6. Develop Rollup Contracts.
     7. Test and Deploy.
2. StarkNet – ZK Rollup
   • Key Features:
     • STARK proofs
     • Cairo language
     • Privacy and Scalability
   • Steps:
     1. Set up StarkNet environment.
     2. Design your rollup.
     3. Write Cairo contracts.
     4. Integrate with Haqq.
     5. Test and Deploy.
3. zkSync – ZK Rollup
   • Key Features:
     • zkSNARK proofs
     • Native token: ZKSwap
     • User-friendly interface
   • Steps:
     1. Set up zkSync environment.
     2. Design your rollup.
     3. Write Solidity contracts.
     4. Integrate with Haqq.
     5. Test and Deploy.
4. Scroll – ZK Rollup
   • Key Features:
     • Scalability and Privacy
   • Steps:
     1. Set up Scroll environment.
     2. Design your rollup.
     3. Write Solidity contracts.
     4. Integrate with Haqq.
     5. Test and Deploy.
5. Polygon zkEVM – ZK Rollup
   • Key Features:
     • Configurable base chains
     • Scalability and Privacy
   • Steps:
     1. Set up Polygon zkEVM environment.
     2. Design your rollup.
     3. Write Solidity contracts.
     4. Integrate with Haqq.
     5. Test and Deploy.
6. ConsenSys Quorum Rollups – ZK Rollup
   • Key Features:
     • Privacy and Security
     • Compliance
   • Steps:
     1. Set up Quorum Rollups environment.
     2. Design your rollup.
     3. Write Solidity contracts.
     4. Integrate with Haqq.
     5. Test and Deploy.

Considerations for Implementing Rollups

1. Custom Base Chain:
   • Haqq RPC URL: Ensure the rollup solution supports Haqq’s RPC URL for seamless communication.
   • Customization: Assess the flexibility in tailoring rollup parameters and governance.
2. Native Token:
   • Token Integration: Evaluate if the solution supports custom tokens.
   • Token Economics: Consider flexibility in defining the token’s supply and governance.
3. Validators:
   • Validator Selection: Understand selection and incentivization.
   • Consensus Mechanism: Evaluate the consensus approach used.
4. Bridge Solutions:
   • Interoperability: Assess the rollup’s ability to connect with other blockchains.
   • Security: Consider the security measures of the bridge solution.
5. Testnet Faucet:
   • Developer Experience: Check for testnet faucets to obtain test tokens.
6. Chain Analytics:
   • Data Insights: Determine if the rollup offers integrated analytics tools.
7. Block Explorer Integration:
   • Transparency: Assess availability of a block explorer for tracking transactions and chain data.