For safer I still prefer not just only use tool but have audit from 3rd party.

Whether you're developing a DeFi app, blockchain game, or any onchain project on Sui, a number of audit firms are already actively supporting the ecosystem, offering security services across various stages of development:

• Asymptotic – Built the Sui Prover, a formal verification tool specifically crafted for Sui smart contract validation.
• Blaize.Security – Provides comprehensive Sui-focused security services, including manual audits, CI/CD pipeline protection, live monitoring, and incident analysis.
• Certora – Combines traditional manual auditing with formal verification to produce rigorous hybrid security assessments.
• MoveBit – One of the earliest firms to adopt formal verification in Sui audits, while also contributing through developer tools and CTF events.
• OtterSec – Known for thorough manual audits and close collaboration with teams throughout the auditing lifecycle.
• Zellic – Offers strong expertise in the Move language and actively works with multiple projects within the Sui ecosystem.

Beside that Sui developers can leverage the Move Registry (MVR) — an onchain package management system that lets teams attach key information like source code, documentation, and audit results directly to their deployed smart contracts.

1. Essential Audit Toolchain

Static Analysis

Tool	Purpose	Key Features
Move Prover	Formal verification	- Mathematical proof of invariants - Detects arithmetic overflows - Ensures access control correctness
Move Analyzer	IDE Integration	- Real-time error detection - Type checking - Cross-module reference validation
Sui CLI Security Checks	Built-in audits	sui move verify sui client verify-source

Example Prover Usage:

spec balance_never_negative {  
    invariant balance >= 0;  
}  

Dynamic Analysis

Tool	Type	Coverage
Sui Test Framework	Unit Tests	- 100% path coverage - Mock objects/clocks
Sui Fuzzer	Property Tests	- Generates edge cases - Finds panics in arithmetic

Fuzz Test Example:

#[test_only]  
fun fuzz_transfer(amount: u64) {  
    let balance = 1000;  
    transfer(&mut balance, amount); // Auto-tests 0, MAX, etc.  
}  

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2. Sui-Specific Scanners

Object Lifecycle Checkers

• Sui Storage Rebate Analyzer | Detects:
  • Unbounded object growth
  • Missing drop abilities
  • Orphaned UIDs

Access Control Audits

# Find all entry functions without signer checks  
grep -r "public entry" ./sources | grep -v "&signer"  

Shared Object Linters

Custom rules for:

• Missing epoch checks
• Concurrent modification risks
• Stale shared object references

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3. Manual Review Techniques

Critical Checks

1. Capability Patterns:

   // Verify admin caps are properly guarded  
   assert!(address_of(signer) == admin_cap.admin, EUnauthorized);  
   

2. Dynamic Field Safety:

   // Ensure no unvalidated user input in dynamic fields  
   dynamic_field::add(&mut obj, user_input, value); // RISKY  
   

Gas Hotspots

• Storage Operations:

  // Prefer Table over vector for large collections  
  let bad: vector<u64>; // Expensive deletions  
  let good: Table<ID, u64>; // O(1) ops  
  

Sui Framework Adherence

• Cross-check against:
  • sui::coin
  • sui::clock

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4. Integrated Audit Workflow

Step 1: Static Scan

sui move build --lint && \  
sui move prove --path ./sources  

Step 2: Dynamic Testing

sui move test --coverage && \  
move-fuzzer ./sources -iterations 1000  

Step 3: Manual Review

1. Check all entry functions:
   • Signer present?
   • Input validation?
2. Audit shared objects:
   • Epoch checks?
   • Locking mechanisms?

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5. Common Findings by Tool

Tool	Typical Catches
Move Prover	- Integer overflows - Unreachable code
Sui CLI	- Invalid object ownership - Missing abilities
Fuzzer	- Panic on edge values - Gas bombs
Manual	- Business logic flaws - Marketplace compatibility

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6. Pro Tips

✅ Continuous Auditing

# GitHub Action example  
- uses: MoveAnalyst/move-security-check@v1  
  with:  
    path: ./sources  

✅ Compare Against Known Vulnerabilities

• Sui Audit Reports
• Move Security Hall of Fame

✅ Use Multiple RPCs
Test against:

• Localnet
• Testnet
• Different fullnode providers

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