# Spire Labs Unveils Based L3

*A based L3 is a chain that leverages the L2’s sequencer instead of running its own centralized sequencer*

By [ETH Daily](https://ethdaily.io) · 2025-04-08

news, 2025, april2025

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Quick Take
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*   Spire Labs launches a Based L3.
    
*   Ithaca introduces Proto.
    
*   Market response to reciprocal tariffs.
    
*   Eigen summer fellowship
    

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Spire Labs Unveils Based L3
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Listen to this episode from Ethereum Daily News on Spotify. Spire Labs launches a Based L3 on testnet. Ithaca introduces the Proto Typescript library. And the crypto market cap dips below $1.5 trillion amid reciprocal tariffs. Read more: https://ethdaily.io/679

https://spotify.com

![](https://storage.googleapis.com/papyrus_images/b39cfae4d0af0d3ff43815e8252979a9.jpg)

](https://open.spotify.com/episode/3dVe0V5O5Q5TcCbN3fw5Jd)

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Spire Labs Launches Based L3
----------------------------

Spire Labs [launched](https://paragraph.com/@spire/a-live-demo-of-synchronous-composability) a based L3 appchain on testnet with synchronous composability. A based L3 is a chain that leverages the L2’s existing sequencer instead of running its own centralized sequencer. It allows the L3 to interact with the L2 as if it were a native smart contract, enabling synchronous composability. The implementation is lightweight, cost-effective, and reduces infrastructure overhead. Spire Labs is an infrastructure provider building the Based Stack, an open-source framework that lets developers launch customizable appchains on Ethereum, advancing scalability and interoperability across L2s and L3s.

Ithaca Proto Library Demos
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Ithaca [released](https://x.com/kaijuneer/status/1908716983950233624) demos for Porto, a new TypeScript library that simplifies the integration of authentication, crypto payments, and account recovery into applications. Porto is modular, supports the latest account abstraction standards like EIP-7702 and RIP-7212, and works across web, mobile, and desktop platforms. The library includes an EIP-1193-compatible provider and integrates with popular tools like Wagmi and Privy. Key features include embedded onboarding with passkeys and WebAuthn, privacy-preserving identity using ZK Passport, built-in access controls, stealth addresses, ERC-7683 cross-chain compatibility, and multi-path recovery.

Market Cap Dips Below $1.5 Trillion
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The price of ETH [dropped](https://www.coingecko.com/en/coins/ethereum) to a low of $1,431 earlier today, a level not seen since January 2023, as market volatility surged in response to the Trump administration’s ongoing reciprocal tariffs. The broader crypto market saw over $1.5 billion in liquidations, pushing total market capitalization below $1.5 trillion. At the time of writing, ETH has rebounded slightly, trading at $1,585.

Other News
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*   Eigen summer [fellowship](https://x.com/sreeramkannan/status/1908570726090891499)
    
*   Lens Chain [releases](https://x.com/LC/status/1909279198578970911) Dev Dashboard
    
*   [Fee structure](https://ethresear.ch/t/fee-structure-for-execute-precompile/22096) for EXECUTE-precompile
    
*   Fed holds [emergency meeting](https://www.federalreserve.gov/aboutthefed/boardmeetings/20250407closed.htm)
    
*   Interop [Testing Call #32](https://x.com/abcoathup/status/1909373914494767468)
    
*   Read: [Rollups & Preconfs](https://x.com/fabric_ethereum/status/1909329741083193362)
    
*   Base [distributes](https://x.com/buildonbase/status/1909383737156288953) Builder rewards
    
*   Local Ethereum [roundup](https://localethereum.beehiiv.com/p/local-ethereum-3)
    
*   [Etherealize on Bankless](https://x.com/BanklessHQ/status/1909214573321761215)
    

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See [**disclosures**](https://ethdaily.io/disclosures)

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*Originally published on [ETH Daily](https://ethdaily.io/679)*