Linea

Linea's cryptography team has released **Small Fields**, a major upgrade to their zero-knowledge prover system. **Key improvements:** - Faster proving times - Reduced operational costs - Lighter computational requirements - Progress toward decentralizing the prover role This technical advancement represents a concrete step in Linea's roadmap toward achieving real-time finality for transactions on their zkRollup. Full technical breakdown: [linea.build/blog/small-fields-faster-proving-on-linea-toward-real-time-finality](https://linea.build/blog/small-fields-faster-proving-on-linea-toward-real-time-finality)

**EIP-7702 is now live on Linea**, enabling existing Ethereum accounts to execute smart contract functionality without migrating addresses or switching wallets. **Key capabilities unlocked:** - Transaction batching - Gas sponsorship - Session keys - Account recovery - Smart contract logic execution The upgrade eliminates the traditional choice between simple private key accounts and powerful smart contract wallets. **EIP-7702 is fully compatible with ERC-4337**, the existing smart account standard, allowing users to benefit from both approaches. With native MetaMask integration, these features reach **30M+ existing users** immediately, requiring no new onboarding flow. Every account abstraction upgrade landing on Ethereum mainnet will be available on Linea as part of their roadmap toward full native account abstraction. [Read the full announcement](https://linea.build/blog/your-wallet-just-got-smarter-without-changing-your-address)

Linea has announced new smart account capabilities that simplify blockchain interactions: **Key Features:** - **Combined transactions**: Approve and swap tokens in a single step - **Flexible gas payments**: Pay transaction fees in USDC, mUSD, or any ERC-20 token instead of just ETH - **Session keys**: Grant temporary, time-limited access to apps or bots - **Guardian recovery**: Add backup recovery options to existing wallet addresses These improvements aim to reduce friction in using decentralized applications by eliminating multiple transaction steps and offering more payment flexibility. The session key feature allows users to automate certain actions without compromising full wallet control, while guardian recovery provides an additional security layer for account access. The updates build on previous guidance about token approvals, where users were reminded to regularly revoke old permissions to maintain security.

A new transaction type enables **temporary delegation** of account authority to smart contract logic—similar to a scoped, revocable power of attorney. **Key features:** - Your address remains unchanged - You retain full ownership of your keys - Delegation can be revoked in a single transaction This mechanism allows controlled autonomy for operations like AI agents managing portfolios, while maintaining custody. Users can set specific permissions—such as token swaps, protocol interactions, and spending limits—through one signature. The system prioritizes **user control**: rights can be revoked at any time, and the delegation operates within predefined boundaries. This shifts the focus from trust to defining appropriate tasks within a secure framework.

Linea has published an update to its documentation page. The zkEVM rollup's technical documentation is available at docs.linea.build for developers building on the network. **Key Points:** - Documentation refresh for Linea's developer resources - Updates available on the official [Linea Docs](https://docs.linea.build/) page - Follows previous documentation updates from earlier this month Linea continues to maintain its technical documentation for developers working with the zkEVM scaling solution.

Phylax Systems CEO Odysseas will discuss the evolution from reactive to proactive security approaches in DeFi during an upcoming conversation. **Key Details:** - **Topic:** The Credible Layer and its implications for builders and DeFi security - **Date:** Thursday, January 29th - **Time:** 3:00 PM UTC - **Platform:** X and YouTube - **Hosts:** suzapolooza_eth and EricCMack Several protocols including Euler Finance, Malda, Turtle, and Denaria Finance have already integrated the Credible Layer for protocol protection. Public assertions are available at [app.phylax.systems](http://app.phylax.systems).

**Four DeFi protocols now live with Credible Layer protection** Euler Finance, Malda, Turtle, and Denaria Finance have deployed Phylax's Credible Layer to protect their protocols, with more deployments coming soon. **How it works:** - Protocols define "bad outcomes" through assertions - security rules validated by the sequencer - Invalid transactions are dropped before execution - Valid transactions proceed normally - All assertions are publicly viewable at [app.phylax.systems](http://app.phylax.systems) **The shift from bug hunting to outcome prevention** Traditional security focuses on finding bugs, but some always slip through. The Credible Layer takes a different approach by preventing harmful outcomes rather than searching for vulnerabilities. Linea has integrated this technology into its sequencer, stopping exploits before they execute. This risk reduction enables institutions like SharpLink to deploy more capital into DeFi. The technology aims to make DeFi less risky for mainstream adoption. [Learn more](https://docs.phylax.systems/credible/credible-introduction?utm_source=twitter&utm_medium=social&utm_campaign=cmp-100328643-afbf08)

Linea has introduced a new feature allowing developers to write and deploy assertions directly onchain in Solidity. The sequencer enforces these rules against every transaction without requiring third parties or additional trust assumptions. **Key features:** - Assertions written in Solidity and deployed onchain - Sequencer-level enforcement on all transactions - No external dependencies or new trust models - Rules can be modified without touching production contracts This builds on Linea's recent collaboration with [Boundless](https://boundless.xyz) to support The Signal, an open-source ZK consensus client that enables trustless Ethereum state access across rollups.

**Lend.xyz has officially launched on Linea**, bringing tokenized real-world assets (RWAs) to the Layer 2 network. **Key Features:** - Enables fractional ownership of real estate properties - Makes real estate investing more accessible through tokenization - Leverages Linea's zk rollup infrastructure for scalability **Context:** Linea continues to attract RWA protocols, following LiveArt's earlier integration which brought fractionalized art and collectibles to the network. The platform allows users to buy, trade, and borrow against tokenized assets. This launch expands the range of real-world assets available on Linea beyond art and collectibles into the real estate sector.

**Linea achieves historic milestone** by upgrading simultaneously with Ethereum Mainnet for the first time, proving zkEVMs can match Ethereum's upgrade pace. **Rapid evolution timeline:** - zkEVM to London: 4 years - London to Prague: 4 months - Prague to Osaka: **real-time** **Technical approach sets Linea apart:** - Develops ZK proofs directly for EVM (vs. RISC-V virtual machines) - More manual work but delivers superior performance - Plans shift to zkASM for faster circuit implementation **Developer benefits:** - Immediate access to newest EVM features when Ethereum upgrades - Deploy latest Solidity code without modifications - True EVM equivalence with no delays This breakthrough enhances onboarding, security, and performance while proving skeptics wrong about zkEVM upgrade capabilities. [Learn more about the Fusaka upgrade](https://paragraph.com/@linea/ethereum-evolves-and-so-does-linea-introducing-the-fusaka-upgrade)