We architect and deploy custom smart contracts that form the secure, immutable backbone of your application. Our development process is built on audited code patterns and gas optimization from day one, ensuring your protocol is both secure and cost-effective to operate.
LABS
Services
Relayer Security Audit
Secure your gasless transaction infrastructure. Our expert audits identify critical vulnerabilities in paymaster sponsorship logic, relayer networks, and fund management systems before they impact your users.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
- Full Lifecycle Development: From initial design and
Solidity/Rustcoding to deployment, verification, and ongoing maintenance. - Security-First Approach: All contracts undergo internal audits and are built with
OpenZeppelinlibraries, preparing them for formal third-party review. - Protocol Integration: Seamless compatibility with major standards (
ERC-20,ERC-721,ERC-1155) and DeFi building blocks (oracles, AMMs, staking).
We deliver battle-tested contracts that reduce vulnerabilities and accelerate your path to a secure mainnet launch.
key-features-cards
MULTI-LAYER SECURITY
Comprehensive Audit Coverage
Our relayer security audit delivers a systematic, in-depth review of your entire transaction processing pipeline, from user signature validation to on-chain settlement. We identify and remediate vulnerabilities before they impact your users or assets.
01
Smart Contract Integration
We audit the core relayer contracts handling gas sponsorship, nonce management, and transaction bundling. We verify adherence to standards like ERC-2771 and ERC-4337, ensuring no reentrancy or logic flaws.
100%
Line Coverage
0 Critical
Findings Target
02
Backend & API Security
Our assessment covers your off-chain infrastructure—signer servers, job queues, and RPC management. We test for injection flaws, rate limiting bypasses, and private key handling to prevent server-side exploits.
OWASP Top 10
Framework
ISO 27001
Compliance Check
03
Frontend & SDK Analysis
We review client-side libraries, wallet connection flows, and transaction simulation to prevent phishing, front-running, and user interface manipulation attacks that target end-users.
EIP-1193
Standard Audit
Phishing Resistant
Validation
04
Economic & Incentive Review
We model attack vectors like griefing, fee extraction, and MEV exploitation specific to relayers. Our report includes mitigation strategies for incentive misalignment and economic sustainability.
Simulation
Attack Modeling
Gas Cost
Optimization Audit
05
Operational Security (OpSec)
We evaluate key management, multi-signature setups, upgrade procedures, and incident response plans. Our review ensures your team has secure processes for deployment and maintenance.
SOC 2
Principles Reviewed
24/7
Monitoring Guidance
06
Final Verification & Reporting
Receive a detailed technical report with CVSS-scored vulnerabilities, proof-of-concept code, and step-by-step remediation guidance. Includes a re-audit to verify all fixes are implemented correctly.
< 10 Days
Report Delivery
Guaranteed
Re-Audit Pass
benefits
BEYOND STANDARD SMART CONTRACT REVIEWS
Why a Specialized Relayer Audit is Critical
Relayers are complex, stateful systems that bridge on-chain and off-chain logic. A generic smart contract audit misses the critical attack vectors unique to transaction ordering, fee management, and cross-chain message validation.
01
State Management & Race Conditions
We audit for nonce management flaws, transaction ordering attacks (like front-running and sandwiching within your system), and state synchronization errors between your relayer nodes and the blockchain.
70%
of relayer exploits involve state logic
< 48 hrs
Mean time to report critical findings
02
Fee Logic & Economic Security
Our review validates your fee calculation, distribution, and withdrawal mechanisms to prevent theft of protocol fees, griefing attacks, and economic exploits that can drain your treasury.
100%
Fee path coverage in audit scope
$0
Critical fee-related bugs in live clients
03
Cross-Chain Message Validation
For cross-chain relayers, we rigorously test message encoding/decoding, signature verification, and guardian set logic to prevent spoofing and unauthorized state changes.
5+
Bridge protocols audited
OWASP
Top 10 for Web3 compliance
04
Node Infrastructure & Off-Chain Components
We assess the security of your off-chain indexers, RPC configurations, keeper scripts, and private key management—components ignored in a standard contract audit.
24/7
Monitoring for configuration drift
SOC 2
Infrastructure security framework
05
Gas Optimization & Denial-of-Service
We identify gas inefficiencies in relayer logic and test for DoS vectors where attackers can spam transactions to block legitimate operations or exhaust funds.
15-40%
Typical gas cost reduction
100k+
Stress test transactions per audit
06
Upgradeability & Admin Controls
We verify that upgrade mechanisms (Proxies, Diamonds) and admin multi-sigs are implemented securely, preventing unauthorized upgrades or privilege escalation.
Zero
Upgrade-related incidents post-audit
OpenZeppelin
Standards compliance for proxies
Choose the right level of security for your project
Relayer Security Audit Tiers
Compare our structured audit packages designed for Web3 startups and enterprises. Each tier provides a comprehensive security assessment with escalating levels of depth, support, and ongoing protection.
| Security Feature | Essential Audit | Comprehensive Audit | Enterprise Security Suite |
|---|---|---|---|
Smart Contract Core Logic Audit | |||
Relayer Architecture & Integration Review | Basic | In-depth | Full Architecture Review |
Gas Optimization & MEV Analysis | |||
Formal Verification (Key Functions) | |||
Third-Party Dependency Audit | |||
Automated Monitoring Setup | 30 days | 90 days + Custom Alerts | |
Emergency Response SLA | 24h | 4h with On-Call Engineer | |
Remediation Support & Re-audit | 1 round | 2 rounds | Unlimited during contract |
Final Report & Executive Summary | |||
Public Audit Page & Badge | |||
Typical Project Scope | Up to 5 contracts | Up to 15 contracts | Custom |
Estimated Timeline | 2-3 weeks | 4-6 weeks | Custom |
Starting Price | $15,000 | $45,000 | Custom Quote |
process-walkthrough
CORE INFRASTRUCTURE
Smart Contract Development
Secure, production-ready smart contracts built on battle-tested standards and audited code.
We architect and deploy the foundational logic for your Web3 application. Our contracts are built for security, gas efficiency, and upgradeability from day one, using industry standards like OpenZeppelin and Solmate.
- Custom Logic: Tailored
Solidity/Vypercontracts for DeFi, NFTs, DAOs, and RWA. - Security-First: Rigorous testing with
Foundry/Hardhat, formal verification, and pre-audit readiness. - Production Ready: Includes deployment scripts, upgrade proxies (
ERC-1967), and comprehensive documentation.
We deliver auditable, maintainable code that reduces risk and accelerates your path to mainnet launch.
how-we-deliver
OUR METHODOLOGY
How We Deliver Unmatched Security Depth
Our audit process is engineered for the high-stakes environment of blockchain relayers, combining battle-tested methodologies with deep protocol expertise to eliminate vulnerabilities before they reach production.
01
Multi-Layer Threat Modeling
We analyze your relayer's attack surface across the application, network, and consensus layers. This includes front-running resistance, transaction ordering attacks, and validator set manipulation specific to your underlying chain (Ethereum, Polygon, Arbitrum, etc.).
15+
Threat Categories
100%
Coverage
02
Automated & Manual Code Review
Leverage industry-standard static analyzers (Slither, MythX) for broad coverage, paired with expert manual review of core logic—gas auction mechanisms, fee calculations, and nonce management—to catch subtle, high-impact bugs machines miss.
2,000+
Custom Detectors
100%
Critical Logic Reviewed
03
Economic & Incentive Analysis
We simulate adversarial economic scenarios to test the resilience of your fee models, slashing conditions, and staking mechanics. Ensures your system remains solvent and secure under market volatility and coordinated attacks.
50+
Attack Vectors Modeled
Real-time
Simulations
04
Formal Verification for Critical Paths
Apply mathematical proofs to verify the correctness of your system's most critical components—such as fund settlement and withdrawal finality—guaranteeing they behave as specified under all possible conditions.
Mathematical
Proofs
0
Edge Case Failures
05
Integration & Dependency Audit
We audit not just your code, but all integrated smart contracts (oracles, bridges, DeFi protocols) and off-chain dependencies. Identifies risks from external system failures or malicious upgrades.
Full Stack
Scope
Zero Trust
Assumption
06
Remediation & Post-Audit Support
Receive a prioritized vulnerability report with actionable fixes and code examples. We provide follow-up reviews to verify corrections and offer ongoing consultation for future upgrades, ensuring long-term security hygiene.
< 48h
Response Time
Guaranteed
Re-Audit
Technical Due Diligence
Relayer Security Audit FAQs
Get clear answers on our security audit process for cross-chain relayers, designed for CTOs and technical founders evaluating infrastructure partners.
We employ a hybrid methodology combining automated analysis with manual expert review. This includes: 1) Architecture Review: Assessing the relayer's trust model, upgrade mechanisms, and failure scenarios. 2) Smart Contract Audit: In-depth line-by-line review of on-chain components (e.g., Light Client, Message Verifiers) using static/dynamic analysis. 3) Off-Chain Node Audit: Security assessment of the off-chain software, including RPC handling, signing logic, and slashing conditions. 4) Integration Testing: Simulating adversarial network conditions and fork scenarios. Our process is based on industry standards from OpenZeppelin and Trail of Bits.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall