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Metabased Sequencer Modules Workshop��Let’s create a module

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Gus

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

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Overview

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

  1. Create a Metabased rollup from a smart contract��
  2. Customize rollup behavior via a module��
  3. Understand transaction flow

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Create a Rollup from a Smart Contract

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

Deploy the Metabased rollup contract:

MetabasedSequencerChain.sol��

Now you can extend behavior via a module

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Customize Rollup Behavior via a Module

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

Just need to implement one function:�

function isAllowed(address proposer) external view returns (bool);

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Customize Rollup Behavior via a Module

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

Example from NFTOwnershipSequencerModule.sol

/**

* @notice Checks if the caller is allowed based on their NFT ownership.

* @param proposer The address of the proposer to check.

* @return bool indicating if the proposer is allowed.

*/

function isAllowed(address proposer) external view override returns (bool) {

IERC721 nft = IERC721(nftAddress);

if (nft.balanceOf(proposer) < minimumOwnership) {

revert InsufficientNFTOwnership();

}

return true;

}

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How To Create Module

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

Clone the repo:

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https://bit.ly/mbs-repo

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How To Create Module

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

Set up your environment

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QR for video:

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https://bit.ly/mbs-intro��

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Sign Up

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

Set up your environment

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QR for video:

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https://bit.ly/mbs-contact��

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Understanding Transaction Flow

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

Deploy Module on Metabased dev chain

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  1. Run command to fork the chain locally

> make fork-mt

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2. Open a new terminal window and run deployment script

> make run-nft-mod

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Fork the Metabased Testnet - make fork-mt

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

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Run deployment script - make run-nft-mod

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

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Conclusion - 3 Takeaways

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

  • Create a Metabased rollup from a smart contract��
  • Customize rollup behavior via a module��
  • Understand transaction flow

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Thank you!

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Gus

Edge City Lanna - Chiang Mai - November 5, 2024

© 2024 Syndicate, Inc. All rights reserved.

13

gus@syndicate.io

https://syndicate.io/blog