usefirewall.com

What It Is

Firewall is an on-chain security infrastructure project for smart contract networks that introduces the concept of “Safe Blockspace.” Instead of only checking signatures and fees, it adds an additional judgment before final transaction confirmation: whether the transaction will steal user assets. Its core product, Safe Sequencer, analyzes transaction intent at the sequencer and execution-environment level, blocking transactions classified as smart contract exploits or on-chain theft.

Core Capabilities

In terms of protection scope, it targets DeFi, smart contract liquidity pools, liquidity providers, and on-chain asset holders. Its focus is not Web2-style network perimeter defense, but transaction-level risk filtering on-chain. Technically, Firewall claims to embed A.I. models, anomaly detection, pattern recognition, and dynamic analysis into EVM / blockchain execution clients, and to be building a Rust-based Firewall EVM. Its Kyber exploit demo shows that the same attack can succeed in a Base test environment, while being blocked by Safe Sequencer on the Firewall testnet. For deployment, the materials mention a current testnet based on an OP-Stack fork, anchored to Ethereum to preserve censorship resistance and user rights; in the event of a false positive, users can access their assets via L1 forced inclusion.

Pricing and Compliance

The collected materials do not disclose pricing, fee models, payment methods, SLA, compliance certifications, or third-party audit information. As such, it currently looks more like an early-stage infrastructure / testnet project than a mature commercial security product. In terms of management capabilities, only a testnet explorer and blocked transaction page are visible so far; there is no clear information yet on enterprise-grade alerts, policy configuration, reporting, or SIEM integration.

Pros and Cons

Its strength is that it addresses a fundamental problem in smart contract security: once an attack transaction is included on-chain, it is usually irreversible. If malicious activity can be identified earlier at the sequencer layer, the protective value could be significant. Its non-custodial design and anchoring of user rights to L1 also help reduce custody risk. The downside is that the technology is complex and still appears to be at the Proof of Tech stage. AI / mathematical classification can produce both false positives and false negatives, and commercialization, operational support, and ecosystem integrations have not yet been fully disclosed.

Who It’s For and Access from China

It is suitable for protocol teams concerned about DeFi asset security, on-chain fund holders, and builders of Rollups / smart contract networks. It is not suitable for users looking for traditional enterprise firewalls, EDR, or WAF products. There is no evidence in the source text regarding accessibility from China, so this remains unknown; payment methods are also not disclosed. Alternative directions include smart contract audits, formal verification, on-chain monitoring and risk control, transaction simulation, and other sequencer-level security solutions.