Linea DeFi Voyage Coming to an End

MetaMask has launched its debit card in the United States, operating on the Linea network. **Key Details:** - Virtual cards are now available for immediate use - Physical metal cards can be pre-ordered - The card runs on Linea, a zkEVM layer-2 network - Follows previous rollouts in Europe, Latin America, and Canada The MetaMask Card allows users to spend cryptocurrency directly from their wallets for everyday purchases. By integrating with Linea, transactions benefit from lower fees and faster processing compared to Ethereum mainnet. This expansion marks a significant step in bringing crypto payments to mainstream US consumers, making it easier to use digital assets for real-world transactions without converting to fiat first.

At ETH Denver, Charlie St. Louis announced that **Phylax Systems' runtime guardrails** are now integrated into Linea's sequencer, successfully blocking nearly **90% of numerical DeFi vulnerabilities** before execution. **Key Features:** - Runtime protection stops exploits at the sequencer level - Focuses on preventing numerical vulnerabilities in DeFi protocols - Shifts risk profile to enable institutional capital deployment The integration of Phylax's Credible Layer represents a proactive security approach, catching potential exploits before they can impact users or protocols. This infrastructure-level protection aims to make DeFi safer for both retail users and institutional participants like SharpLink. The technology addresses a critical gap in DeFi security by preventing vulnerabilities during transaction execution rather than relying solely on post-exploit detection and response.

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.