# Spire Labs Unveils Based L3

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

**Published by:** [ETH Daily](https://ethdaily.io/)
**Published on:** 2025-04-08
**Categories:** news, 2025, april2025
**URL:** https://ethdaily.io/679

## Content

Quick TakeSpire Labs launches a Based L3.Ithaca introduces Proto.Market response to reciprocal tariffs.Eigen summer fellowship","version":"1.0","provider_name":"Spotify","thumbnail_url":"https://storage.googleapis.com/papyrus_images/b39cfae4d0af0d3ff43815e8252979a9.jpg","type":"rich","thumbnail_height":300,"image":{"base64":"data:image/png;base64,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","img":{"width":300,"height":300,"src":"https://storage.googleapis.com/papyrus_images/b39cfae4d0af0d3ff43815e8252979a9.jpg"}}}" format="iframe">Spire Labs Unveils Based L3Listen 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/679https://spotify.comSpire Labs Launches Based L3Spire Labs launched 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 DemosIthaca released 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 TrillionThe price of ETH dropped 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 NewsEigen summer fellowshipLens Chain releases Dev DashboardFee structure for EXECUTE-precompileFed holds emergency meetingInterop Testing Call #32Read: Rollups & PreconfsBase distributes Builder rewardsLocal Ethereum roundupEtherealize on BanklessSee disclosures

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