We architect, develop, and deploy custom Solidity/Rust smart contracts that form the immutable backbone of your protocol. Our focus is on security-first development, utilizing battle-tested patterns from OpenZeppelin and rigorous internal audits before deployment.
LABS
Services
Cross-Contract Call Fuzzing
Simulate unpredictable sequences of interactions between your smart contracts and their external dependencies to find systemic vulnerabilities that unit tests miss.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by experts for your Web3 application.
Deliver a secure, gas-optimized, and upgradeable contract suite in 2-4 weeks.
- Full Lifecycle Support: From initial design and
Hardhat/Foundrytesting to mainnet deployment and verification. - Protocol Expertise:
ERC-20,ERC-721,ERC-1155, custom DeFi logic, DAO governance, and cross-chain bridges. - Guaranteed Security: Multi-stage review process and recommendations for formal audits with top firms like
CertiKorQuantstamp.
key-features-cards
METHODOLOGY
How Our Cross-Contract Fuzzing Works
Our systematic approach uncovers complex, multi-contract vulnerabilities that traditional unit tests miss, delivering a comprehensive security assessment for your protocol.
01
Protocol Architecture Analysis
We map your entire smart contract dependency graph, identifying all external calls, inheritance chains, and state dependencies to define the attack surface.
100%
Dependency Coverage
> 50
Call Paths Analyzed
02
Property & Invariant Definition
We codify your protocol's core financial logic (e.g., "total supply must be conserved", "no unauthorized minting") into executable security properties for the fuzzer to test.
15-25
Core Properties Defined
Custom
Business Logic Rules
03
Stateful Fuzzing Campaign
Our engine executes millions of randomized, multi-transaction sequences across contract boundaries, simulating real user behavior and malicious actor strategies.
10M+
Transaction Sequences
Parallel
Execution
04
Exploit Triaging & Validation
Every discovered violation is automatically minimized into a reproducible test case and manually validated by our security engineers to eliminate false positives.
< 5%
False Positive Rate
PoC Provided
For Each Finding
05
Prioritized Risk Report
Receive a detailed report with CVSS-based severity scores, exploit impact analysis, and clear remediation guidance for your engineering team.
24-48h
Report Delivery
Actionable
Remediation Steps
benefits
DELIVERABLES
Business Outcomes: Secure Your Protocol's Foundation
Our Cross-Contract Call Fuzzing service delivers concrete security outcomes, not just a report. We harden your protocol's most critical interactions against real-world exploits.
01
Critical Vulnerability Detection
Identify high-severity bugs in cross-contract logic, including reentrancy, state corruption, and oracle manipulation, before mainnet deployment.
100%
Coverage of External Calls
> 1M
Test Cases Executed
02
Gas Optimization Insights
Pinpoint inefficient call patterns and state access that inflate transaction costs, providing actionable recommendations for optimization.
15-40%
Avg. Gas Reduction
Real-time
Profiling
03
Audit-Ready Codebase
Receive a prioritized remediation roadmap and a fuzzing harness suite, accelerating and de-risking the final security audit process.
2-4 weeks
Faster Audit Timeline
Comprehensive
Test Suite Delivered
04
Proven Security Posture
Leverage battle-tested fuzzing strategies refined on protocols securing over $500M in TVL, ensuring defense against novel attack vectors.
$500M+
TVL Protected
Zero
Post-Audit Exploits
A Security-First Comparison
Cross-Contract Fuzzing vs. Traditional Unit Testing
Understand why automated, property-based fuzzing is essential for securing complex, multi-contract systems where traditional testing falls short.
| Security Testing Aspect | Traditional Unit Testing | Cross-Contract Fuzzing |
|---|---|---|
Testing Scope | Single contract, isolated functions | Full protocol, all contract interactions |
Edge Case Discovery | Manual, developer-defined | Automated, generates thousands of random inputs |
Integration Bug Detection | Limited or none | Primary focus; tests calls, callbacks, and state changes |
Re-entrancy & Race Conditions | Misses complex attack vectors | Systematically uncovers exploit paths |
Gas Optimization Insights | Manual analysis required | Identifies gas-intensive execution paths |
Time to Comprehensive Coverage | Weeks of manual test writing | Hours of automated property validation |
Audit Readiness | Provides basic coverage | Delivers a hardened, pre-audited codebase |
Typical Cost for a DApp | $10K-$30K in dev time | $15K-$50K for automated security assurance |
how-we-deliver
PROVEN PROCESS
Our End-to-End Fuzzing Methodology
Our systematic approach to cross-contract call fuzzing identifies critical vulnerabilities that unit and integration testing miss, delivering actionable security insights.
01
Protocol-Agnostic Target Analysis
We analyze your entire smart contract system, mapping all external dependencies, oracles, and cross-chain interactions to build a comprehensive fuzzing target model.
100%
Dependency Coverage
< 24 hrs
Initial Model
02
Property-Based Test Generation
We define and encode security properties (e.g., "no reentrancy", "oracle price bounds") as executable specifications, creating the foundation for intelligent, stateful fuzzing campaigns.
50+
Pre-built Properties
Custom
Business Logic Rules
03
Stateful Differential Fuzzing
Our fuzzers execute complex, multi-transaction sequences across contract boundaries, comparing outcomes against expected behavior to uncover hidden state corruption and logic flaws.
10M+
Execution Paths
Sub-second
Transaction Speed
Choose Your Security Coverage
Technical Specifications & Deliverables
Compare our structured service tiers for comprehensive cross-contract call fuzzing, designed to scale with your project's complexity and risk profile.
| Security Feature | Starter | Professional | Enterprise |
|---|---|---|---|
Cross-Contract Interaction Fuzzing | |||
Protocol Integration Points Tested | Up to 5 | Up to 15 | Unlimited |
Custom Fuzzing Harness Development | |||
Stateful Invariant Testing | |||
Gas Optimization Analysis | Basic | Advanced | Advanced + Recommendations |
Executive Summary Report | |||
Technical Deep-Dive Report | |||
Remediation Support & Re-audit | 1 round | 2 rounds | Unlimited during engagement |
Critical Bug Bounty Coverage (up to) | $50,000 | $250,000 | $1,000,000 |
Response Time SLA | 72h | 24h | 4h |
Engagement Timeline | 2-3 weeks | 3-5 weeks | Custom |
Starting Price | $15,000 | $45,000 | Custom |
Cross-Contract Call Fuzzing
Frequently Asked Questions
Get clear answers about our security testing methodology, process, and outcomes for your smart contract system.
Cross-contract call fuzzing is an advanced security testing method that automatically generates millions of unexpected, adversarial inputs to test the interactions between your smart contracts and external dependencies (like oracles, DEXes, or other protocols). It's critical because over 60% of major DeFi exploits stem from vulnerabilities in these complex interactions, not in isolated contract logic. Our fuzzing uncovers reentrancy, price manipulation, and state corruption issues that static analysis and unit testing miss.
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