We architect and deploy custom smart contracts on EVM-compatible chains (Ethereum, Polygon, Arbitrum) and Solana. Our development process is built for security and speed, delivering a minimum viable product (MVP) in 2-4 weeks.
LABS
Services
Custom Fuzzing Corpus Development
Generic fuzzing finds generic bugs. We build targeted seed corpora and mutation strategies based on your protocol's unique logic and expected user flows to uncover deep, high-impact vulnerabilities.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 specialists for your specific use case.
We don't just write code; we engineer systems that are secure by design and ready to scale.
- Full-Stack Development: From
ERC-20/ERC-721tokens to complex DeFi protocols and DAO governance systems. - Security-First Approach: All code follows
OpenZeppelinstandards and undergoes internal audits before deployment. - End-to-End Delivery: We handle deployment, verification on block explorers, and provide comprehensive documentation.
key-features-cards
YOUR CUSTOM CORPUS
What We Deliver: A Targeted Fuzzing Engine
We build a purpose-built fuzzing engine that learns from your specific protocol to find critical vulnerabilities others miss. This is not generic testing—it's a bespoke security asset.
02
Property-Based Test Harnesses
We develop custom Solidity test harnesses that encode your protocol's core invariants (e.g., "total supply is constant", "no unauthorized transfers"). The fuzzer continuously validates these properties.
03
Stateful & Cross-Contract Fuzzing
Our engine orchestrates complex, multi-transaction sequences to test interactions between your contracts. It uncovers deep state corruption bugs that unit tests and static analysis cannot find.
04
Mutation Strategies for DeFi & NFTs
We implement specialized mutation rules for common patterns: price oracle manipulation, flash loan sequences, ERC-721 batch transfers, and fee accrual logic, dramatically increasing bug discovery.
06
Continuous Integration Pipeline
We deliver a turnkey CI/CD integration (GitHub Actions, GitLab CI) so your custom fuzzer runs on every pull request, preventing new vulnerabilities from reaching production.
benefits
DELIVERABLES
Outcomes: Find Vulnerabilities Before They Find You
Our custom fuzzing corpus development delivers actionable security intelligence, not just raw data. We provide the tools and insights to systematically harden your protocol.
01
Prioritized Vulnerability Report
Receive a detailed, actionable report with CVSS-scored vulnerabilities, proof-of-concept exploits, and clear remediation steps. We focus on high-impact bugs first.
24-48 hrs
Critical Issue TAT
>95%
False Positive Rate
02
Custom Fuzzing Corpus & Harness
We deliver a tailored corpus of transaction sequences and edge-case inputs specific to your protocol's logic, along with a reusable testing harness for your CI/CD pipeline.
10k+
Seed Inputs
Ongoing
Corpus Evolution
03
Protocol-Specific Property Tests
Get a suite of formalized security properties (invariants) written in Solidity or Foundry. These tests codify your system's intended behavior for continuous validation.
50-100+
Core Invariants
Foundry/Echidna
Framework
04
Integration with Existing Audits
Our fuzzing augments manual audits by uncovering complex, state-dependent flaws that static analysis misses, providing layered defense-in-depth.
30-50%
Additional Coverage
Pre & Post-Audit
Deployment Phase
Why a tailored approach is critical for Web3 security
Custom Corpus vs. Generic Fuzzing
Generic fuzzing tools use public datasets, missing protocol-specific attack vectors. Our custom corpus development targets your exact smart contract logic, tokenomics, and user flows for exhaustive vulnerability discovery.
| Security Factor | Generic Fuzzing Tools | Chainscore Custom Corpus |
|---|---|---|
Coverage Depth | Surface-level, common patterns | Deep, protocol-specific state exploration |
False Positive Rate | High (40-60%) | Low (<10%) |
Time to Effective Coverage | Weeks of manual tuning | Days (pre-built for your stack) |
Integration Complexity | High (requires expert configuration) | Low (we handle corpus generation) |
Cost of Missed Vulnerabilities | Extreme (protocol exploits) | Minimal (comprehensive testing) |
Maintenance Overhead | Your team manages updates | We update corpus with protocol changes |
Typical Project Timeline | 3-6 months for full coverage | 4-8 weeks end-to-end |
Total Cost (First Year) | $50K-$150K+ in engineering time | $80K-$200K (fixed scope) |
how-we-deliver
PROVEN FRAMEWORK
Our Methodology: Building Your Protocol's Attack Map
We don't just run generic fuzzers. Our systematic approach constructs a bespoke, high-fidelity attack map for your specific protocol logic, uncovering edge cases others miss.
01
1. Protocol Architecture Deconstruction
We conduct a deep-dive analysis of your smart contracts, tokenomics, and governance mechanisms to map all state transitions, user roles, and value flows. This forms the foundation for targeted test generation.
100%
Code Coverage Target
48 hrs
Initial Analysis
02
2. Custom Property & Invariant Definition
Instead of generic checks, we codify your protocol's specific business logic rules as formal properties (e.g., "total supply is constant," "no unauthorized mint") and system-wide invariants for the fuzzer to validate.
50-100+
Custom Properties
Sol. Spec.
Formal Spec Language
03
3. Seed Corpus & Dictionary Generation
We craft an initial set of protocol-aware transaction sequences and calldata dictionaries, priming the fuzzer with intelligent starting points that reflect real user behavior and known attack vectors.
10k+
Seed Transactions
Prioritized
Attack Vector Focus
04
4. Stateful Fuzzing Campaign Execution
Our engines execute millions of stateful transactions, dynamically exploring the attack map, mutating inputs, and checking defined properties. We monitor code coverage and unique crash paths in real-time.
10M+
Executions/Campaign
24/7
Campaign Monitoring
05
5. Triage & Exploitability Analysis
Every discovered violation is triaged by our security engineers. We filter false positives and assess true risk, providing a severity-ranked report with proof-of-concept exploit code for critical issues.
< 24 hrs
Initial Triage
POC Code
For Critical Bugs
06
6. Corpus Evolution & Regression Suite
We deliver a living fuzzing corpus and regression test suite tailored to your protocol. This enables continuous security validation as your codebase evolves, preventing regression of fixed issues.
Ongoing
Corpus Updates
CI/CD Ready
Integration Support
process-walkthrough
ENGINEERED SECURITY
Custom Smart Contract Development
Secure, audited smart contracts built for production, from MVP to mainnet.
We architect and deploy battle-tested smart contracts that form the core logic of your protocol. Our development process is built on security-first principles, utilizing OpenZeppelin libraries and comprehensive testing suites to mitigate risk before a single line of code hits the blockchain.
From a simple token launch to a complex DeFi protocol, we deliver production-ready code with clear documentation and upgrade paths.
- Full-Stack Development:
ERC-20,ERC-721,ERC-1155, custom DeFi logic, and governance systems. - Security & Audits: Internal reviews, formal verification, and coordination with top-tier audit firms.
- Gas Optimization: Code engineered for up to 40% lower gas costs compared to unoptimized benchmarks.
- Mainnet Readiness: Full deployment pipeline including testnet verification and mainnet launch support.
Custom Fuzzing Corpus Development
Frequently Asked Questions
Get clear answers on our methodology, timelines, and deliverables for building targeted fuzzing environments.
A custom fuzzing corpus is a specialized dataset of inputs, edge cases, and state sequences tailored to your specific smart contract logic. Off-the-shelf fuzzers use generic inputs, missing protocol-specific vulnerabilities. We build a corpus that understands your tokenomics, access controls, and business logic, increasing bug detection rates by 3-5x compared to generic fuzzing.
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