Founder of the Layer 2 Weekly Roundup: https://www.layer2roundup.io/ (prev Scroll)

0/ Diving into Ethereum's Layer 2 ecosystem, a guest thread by @daddysether.eth from the Layer2Roundup.

L2s are the onboarding vehicles to Ethereum's onchain economy, so today we're highlighting some of the biggest L2 updates from the past few weeks.
🧵👇

Ethereum is the world computer. The universal platform for cryptocurrencies, blockchain apps, stablecoins, and decentralized technologies.

1/ L2 protocols are scaling solutions that are designed to make transacting on Ethereum super fast, and ultra low-cost for users all over the world.

Most importantly, L2s have the ability to leverage the industry-leading security properties of the Ethereum blockchain.

2/ First up, @arbitrum launched BoLD.

BoLD introduces permissionless validation, which means that any node operator can now submit a fraud proof to challenge the state of the chain.

This is a huge decentralization unlock that drastically heightens the security of Arbitrum One.

Today, BoLD delivers permissionless validation, making the Arbitrum ecosystem more secure and more decentralized than ever.

Anyone can defend Arbitrum.

Stage 2 soon. https://t.co/y6y1WDTSwc

Arbitrum

Official account of the Arbitrum Foundation.

https://arbitrum.io/

3/ Next, @fuel-network published an in-depth guide which covers the architecture that makes up their decentralized sequencer design.

This guide is helpful for people who wish to explore the benefits of a decentralized sequencer, and why they are beneficial to L2s.

3/ Next, @fuel-network published an in-depth guide which covers the architecture that makes up their decentralized sequencer design.

This guide is helpful for people who wish to explore the benefits of a decentralized sequencer, and why they are beneficial to L2s.

https://x.com/fuel_network/status/1891896128381256173

4/ Additionally, @fuel-network hosted a live Twitter Spaces with @simplystaking to talk you through their new sequencer design.
Many interesting topics were covered, such as:

- Centralized vs decentralized sequencers
- How sequencer design impacts censorship-resistance

4/ Additionally, @fuel-network hosted a live Twitter Spaces with @simplystaking to talk you through their new sequencer design.
Many interesting topics were covered, such as:

- Centralized vs decentralized sequencers
- How sequencer design impacts censorship-resistance 

https://x.com/fuel_network/status/1892212618217300278

5/ Moving on to some public goods news!

The @optimism Collective has committed 8M OP to funding onchain builders who are innovating on the Superchain.

Learn all about how you can become eligible:

5/ Moving on to some public goods news!

The @optimism Collective has committed 8M OP to funding onchain builders who are innovating on the Superchain.

Learn all about how you can become eligible:
https://x.com/Optimism/status/1891910393221747096

6/ Speaking of funding onchain development..

The @swellnetworkio team is allocating 125M SWELL to visionary builders across multiple categories who are helping to bring the L2 ecosystem to life.

Be sure to apply if you are building something that fits within the outlined criteria.

6/ Speaking of funding onchain development..

The @swellnetworkio team is allocating 125M SWELL to visionary builders across multiple categories who are helping to bring the L2 ecosystem to life.

Be sure to apply if you are building something that fits within the outlined criteria.

https://x.com/swellchain/status/1890236960872272268

7/ And lastly for funding, @aztecnetwork has provided $150K to be distributed to a number of cross-chain apps that extend Aztec's core properties, such as privacy and decentralization to other L2 protocols.
Submit your application below!

7/ And lastly for funding, @aztecnetwork has provided $150K to be distributed to a number of cross-chain apps that extend Aztec's core properties, such as privacy and decentralization to other L2 protocols.
Submit your application below!
https://x.com/aztecnetwork/status/1890638824382034414

8/ Modernizing digital gold on @zksync.

Switzerland's largest bank, UBS, deployed a PoC of their "Key4 Gold" initiative on a zkSync validium.

UBS Key4 Gold is a product that allows clients to purchase a claim to physical gold using the Ethereum blockchain.

8/ Modernizing digital gold on @zksync.

Switzerland's largest bank, UBS, deployed a PoC of their "Key4 Gold" initiative on a zkSync validium.

UBS Key4 Gold is a product that allows clients to purchase a claim to physical gold using the Ethereum blockchain.
https://x.com/zksync/status/1885329177446133998

9/ Learn all about preconfirmations with ceciliaz030.

In short, preconfirmations are a way for validators to speed up the time in which a transaction is ordered and processed on Ethereum L1, providing a much more seamless experience for users of the chain.

9/ Learn all about preconfirmations with ceciliaz030.

In short, preconfirmations are a way for validators to speed up the time in which a transaction is ordered and processed on Ethereum L1, providing a much more seamless experience for users of the chain.
https://x.com/taikoxyz/status/1891395496482419109

10/ Based rollups in the OP Stack.

Based rollups are a new flavour of L2 that leverage Ethereum's existing L1 validator set for sequencing, instead of hosting their own sequencer at the L2 layer.

In collaboration with class_lambda, gattacahq released an open-source implementation for Phase 1 of a highly-performant and interoperable based rollup built using the OP Stack.

10/ Based rollups in the OP Stack.

Based rollups are a new flavour of L2 that leverage Ethereum's existing L1 validator set for sequencing, instead of hosting their own sequencer at the L2 layer.

In collaboration with class_lambda, gattacahq released an open-source implementation for Phase 1 of a highly-performant and interoperable based rollup built using the OP Stack.

https://x.com/gattacahq/status/1890466706595680278

11/ Enhancing proof systems with fermah_xyz.

Fermah has integrated with @scrollzkp to provide ultra-efficient proving that will lead to lower costs, and much faster transaction times for users of Scroll.

11/ Enhancing proof systems with fermah_xyz.

Fermah has integrated with @scrollzkp to provide ultra-efficient proving that will lead to lower costs, and much faster transaction times for users of Scroll.

https://x.com/fermah_xyz/status/1892273004597694499

12/ Optimizing for UX with the Open Intents Framework.

Various L2 teams from across the ecosystem have come together to collaborate on a new Intents framework that is set to enable huge UX improvements for Ethereum L2s, such as fast, frictionless, cross-chain asset transfers.

12/ Optimizing for UX with the Open Intents Framework.

Various L2 teams from across the ecosystem have come together to collaborate on a new Intents framework that is set to enable huge UX improvements for Ethereum L2s, such as fast, frictionless, cross-chain asset transfers.
https://x.com/ethereumfndn/status/1892244647369433272

13/ Moving on to the app layer, let's take a look at RealmsEternum.

Eternum is an onchain strategy game built on @starknet that combines the best of AI, gaming, and crypto.

During Season 0, Eternum was responsible for filling 50% of Starknet's available blockspace—Season 1 soon!

13/ Moving on to the app layer, let's take a look at RealmsEternum.

Eternum is an onchain strategy game built on @starknet that combines the best of AI, gaming, and crypto.

During Season 0, Eternum was responsible for filling 50% of Starknet's available blockspace—Season 1 soon!

https://x.com/RealmsEternum/status/1890405950416384465

14/ The XSGD Stablecoin is live on @arbitrum.

Developed by StraitsX, XSGD is a stablecoin that is pegged to the Singapore Dollar and Indonesian Rupiah, built to provide businesses and individuals with easy access to Ethereum's onchain DeFi economy.

14/ The XSGD Stablecoin is live on @arbitrum.

Developed by StraitsX, XSGD is a stablecoin that is pegged to the Singapore Dollar and Indonesian Rupiah, built to provide businesses and individuals with easy access to Ethereum's onchain DeFi economy.

https://x.com/StraitsX/status/1891382070103916773

15/ Onchain is for businesses.

Using meow, businesses can send, receive, and auto-convert USDC from @base, straight to their checking accounts.

15/ Onchain is for businesses.

Using meow, businesses can send, receive, and auto-convert USDC from @base, straight to their checking accounts.

https://x.com/base/status/1891901988641673358

16/ Video games will live on Ethereum L2s.

Immutable is pioneering Web3 gaming by targeting the 3.5B players that currently exist outside of the crypto space.

With at least five new titles launching in 2025, Immutable is working to unlock the first globally-adopted onchain game.

16/ Video games will live on Ethereum L2s.

Immutable is pioneering Web3 gaming by targeting the 3.5B players that currently exist outside of the crypto space.

With at least five new titles launching in 2025, Immutable is working to unlock the first globally-adopted onchain game.
https://x.com/Immutable/status/1889991263749070927

17/ Reactor DEX is launching on @fuel-network.

This Fuel native DEX will introduce "concentrated liquidity," a concept that allows liquidity providers to allocate their funds within specific price ranges to drastically enhance both efficiency and scalability for traders.

17/ Reactor DEX is launching on @fuel-network.

This Fuel native DEX will introduce "concentrated liquidity," a concept that allows liquidity providers to allocate their funds within specific price ranges to drastically enhance both efficiency and scalability for traders.
https://x.com/ReactorDEX/status/1887554740508139655

18/ That's everything for today!

Be sure to get out there and check out some of the amazing applications that are popping up all across Ethereum's Layer 2 ecosystem.

There's something available for everyone!

2/ First up, @arbitrum launched BoLD.

BoLD introduces permissionless validation, which means that any node operator can now submit a fraud proof to challenge the state of the chain.

This is a huge decentralization unlock that drastically heightens the security of Arbitrum One.

https://x.com/arbitrum/status/1889710151332245837