Smart Contract Testing
Comprehensive smart contract testing: unit, integration, fuzz, invariant, fork and formal property testing.
- WalletSigns transaction
- Smart contractVault.deposit()
- BlockchainIncluded in block
- IndexerEvent → Postgres
- APIGraphQL · webhooks
- ApplicationBalance updated
#…4812
12 conf.
#…4813
11 conf.
#…4814
10 conf.
#…4815
pending
Decoded events
- Deposit(0x8f2…a91, 500)confirmed
- Transfer(0x1c7…4de → 0x9b0…77f)confirmed
- RoleGranted(PAUSER, multisig)timelock
RPC failover · 3 providers · reorg-safe indexing
Division
Service area
Smart Contract Engineering
Engagement
Project · Team · Managed
Overview
Testing is where most smart contract bugs should be found. We build test suites that go well beyond happy paths: property-based fuzzing, stateful invariant testing, fork tests against real protocol state, scenario tests for economic attacks and, where valuable, formal verification of critical properties. Coverage and results are documented for auditors.
Common use cases
- Pre-audit test suiteRaising test quality before an audit.
- Legacy contract testingAdding tests to existing contracts.
- Invariant developmentDefining and testing protocol invariants.
- Upgrade testingValidating upgrades against mainnet state.
Quick answers
Smart Contract Testing at a glance
The essentials in brief. Every project is scoped individually — ask us for specifics.
- What is smart contract testing?
- Comprehensive smart contract testing: unit, integration, fuzz, invariant, fork and formal property testing.
- Who is it for?
- Typically Web3 startups, fintechs adding digital assets, and institutions exploring tokenization, stablecoins or on-chain settlement.
- What does Shivacha provide?
- Unit & integration tests
- Fuzz testing
- Invariant testing
- Fork testing
- Attack scenarios
- Coverage reporting
- Which technologies are used?
- Foundry, Hardhat, Solidity, Vyper, Rust, OpenZeppelin — chosen to fit your stack and constraints.
- How does the process work?
- Specify → Design → Implement → Test adversarially → Prepare for audit.
- What affects the cost?
- Contract complexity and number of chains
- Custody and wallet model
- Independent audit scope
- Indexing, analytics and back-office tooling
- Compliance integrations (KYC, AML, Travel Rule)
- Upgradeability and governance requirements
- How long does it take?
- A focused contract system or dApp MVP typically takes 8–14 weeks plus independent audit time; institutional platforms usually take 4–9 months.
- How do I get started?
- Share a short brief in the form below, book a 30-minute call or message us on WhatsApp. A senior engineer replies within one business day; NDA on request.
Capabilities
What we deliver
Unit & integration tests
Complete functional coverage.
Fuzz testing
Randomised inputs finding edge cases.
Invariant testing
Stateful testing of protocol properties.
Fork testing
Testing against live mainnet state.
Attack scenarios
Economic and adversarial simulations.
Coverage reporting
Line, branch and property coverage.
Architecture
Engineered right from day one
The layers we typically design for smart contract engineering, adapted to your stack and partners.
- Audit-ready, not self-auditedInternal review supports but never replaces independent audits.
- Admin key designMultisig, timelocks and role separation for privileged functions.
- Upgradeability trade-offsProxies add flexibility and risk; used only when justified.
- Gas efficiencyOptimised where it matters, never at the expense of clarity or safety.
Delivery
How an engagement runs
- 1
Specify
Written specification with invariants, roles and failure modes.
- 2
Design
Contract architecture, storage layout, upgrade and admin model.
- 3
Implement
Minimal, readable code using well-reviewed libraries.
- 4
Test adversarially
Fuzzing, invariant tests, fork tests against real protocols and static analysis.
- 5
Prepare for audit
Documentation, coverage reports and a known-issues list for independent auditors.
Security
Security built into delivery
Controls we apply by default on this kind of work — not a separate phase at the end.
Specification first
Roles, invariants and threat model documented before code.
Adversarial testing
Fuzz, invariant and fork tests plus static analysis on every change.
Key management
Admin keys in multisig or MPC with timelocks on sensitive actions.
Independent audit
Code prepared for — and we recommend — an external audit before mainnet value.
Technology
Tools we use for this
Products
Start from a platform
Shivacha Tokenization Platform
Tokenization-as-a-service for many issuers and asset classes.
Learn moreShivacha DeFi Platform
Modular DeFi: swaps, lending, vaults and staking with risk controls built in.
Learn moreShivacha Token Launch
Deploy, distribute and manage tokens with vesting, claims and treasury controls.
Learn moreRelated services
Often combined with
Web3 Development
Web3 application development — dApps, wallet onboarding, smart contracts and the off-chain backend that makes them fast and usable.
Learn moreToken Development
Token development for utility, governance, payment, NFT and permissioned tokens — contracts, vesting, distribution and launch tooling.
Learn moreSmart Contract Development
Audit-ready smart contract development in Solidity, Vyper and Rust — specified, tested adversarially and documented.
Learn moreDedicated team
Smart Contract Team
Audit-ready smart contract engineers for tokens, DeFi and tokenization.
Work & insights
Related thinking
Tokenized fund units with on-chain eligibility
How we structure a fund tokenization platform where only eligible investors can hold or receive units.
Learn morePolicy-controlled institutional digital asset operations
A reference design for institutions that need every digital asset transaction initiated, approved and signed under explicit policy.
Learn moreHow to hire blockchain developers: skills to test and mistakes to avoid
Good blockchain developers combine security instinct, systems thinking and product sense. What to look for, how to test it, and the red flags that should end an interview.
Learn moreFAQ
Frequently asked questions
What coverage is good enough?
High line and branch coverage is necessary but not sufficient; invariant and fuzz testing of critical properties matters more.
Do you use formal verification?
For critical components where the cost is justified, we apply formal methods or symbolic execution to key properties.
What does audit-ready mean?
It means the contracts arrive at an independent audit with a clear specification, comprehensive tests including fuzz and invariant tests, static analysis resolved, documented trust assumptions and deployment plans — so auditors spend their time on deep issues.
Which languages do you use?
Solidity for EVM networks, with Vyper where appropriate, and Rust for Solana and other Rust-based environments.
Next step
Discuss Your Blockchain Project.
Tell us about your smart contract testing requirements — goals, timeline and constraints. We will reply with questions, an approach and next steps.
- Senior engineer reads every enquiry
- Reply within one business day
- NDA on request
Your details are used only to reply to this enquiry.