A smart contract can manage tokens, user funds, staking rewards, governance, trades, or entire DeFi protocols, leaving little room for coding errors. One overlooked vulnerability can become an expensive attack path once the contract reaches mainnet. Bitdeal provides smart contract auditing services to identify security weaknesses, review business logic, and assess contract code through analysis and review, along with guidance and re-audit support before deployment or after major upgrades.
Why Smart Contract Security Needs More Than Automated Scanning
Smart contract security starts before a contract interacts with real users and assets. Testing whether functions work correctly is only one part of the process. An audit also examines how those functions behave under unexpected inputs, unusual transaction sequences, permission changes, external calls, and adversarial conditions.
This matters particularly for DeFi protocols, token systems, wallets, DEXs, bridges, staking platforms, and other applications where contract logic directly controls assets. Industry audit methodologies commonly combine code review, security analysis, vulnerability classification, reporting, and remediation rather than relying on a single automated scan.
Smart Contract Auditing Services We Offer
Automated Security Analysis
We run automated security checks to identify known vulnerability patterns, suspicious code behaviour, and common contract weaknesses. Our team uses these results as an initial reference for areas that need deeper technical review.
Manual Code Review
Our security specialists examine contract code to identify issues that automated tools may not detect. We review function behaviour, contract interactions, and implementation details based on the project's architecture.
Vulnerability Detection
Bitdeal identifies security vulnerabilities and classifies findings according to their potential severity and impact. We document each finding with technical details so developers can understand the issue and address it correctly.
Business Logic Review
We examine whether the smart contract development behaves according to the project's intended rules and economic model. This includes reviewing transaction flows, asset handling, calculations, and interactions between contract functions.
Access Control and Permission Analysis
Our team reviews ownership structures, administrative roles, privileged functions, upgrade mechanisms, and permission boundaries. We look for situations where unauthorized or excessive access could affect contract operations.
Gas and Performance Analysis
We review contract operations that may consume excessive gas or create unnecessary execution overhead. Our analysis identifies inefficient patterns that could affect transaction costs and the practical use of the application.
Third-Party and External Contract Review
Bitdeal assesses external calls, libraries, price oracles, protocols, and other dependencies connected to the smart contract. We examine how these integrations interact with the contract and where they may introduce additional security risks.
Remediation and Re-Audit
After the audit, we provide documented findings and remediation guidance for identified issues. Once the fixes are implemented, our team reviews the updated code to verify the changes and reassess the affected areas.
Benefits of Smart Contract Audit Services
A smart contract audit gives development teams an independent security review before users depend on the system.
Identify vulnerabilities before deployment
Find security weaknesses while contracts can still be modified without affecting live users and assets.
Reduce exposure to contract-level attacks
Review permissions, asset transfers, business logic, external calls, and other areas commonly associated with security risks.
Create a documented security checkpoint
An audit provides a structured review before mainnet deployment, token launches, upgrades, or major protocol releases.
Prioritize remediation
Severity classifications help development teams understand which findings require immediate attention.
Provide security evidence
A documented audit gives stakeholders a clearer view of what was reviewed and which findings were identified.
Types of Smart Contract Audits We Offer
Our team offers different smart contract audit approaches based on the contract’s development stage, complexity, and security requirements.
Interim Smart Contract Audit
We review development-stage scontracts to identify major security issues before final deployment. This helps teams address vulnerabilities while the code is still being updated.
Pre-Deployment Smart Contract Audit
Our team reviews contracts before mainnet deployment to identify vulnerabilities and implementation risks before users interact with the system.
Manual Smart Contract Audit
We manually review contract logic, function interactions, access controls, and application-specific behaviour. This finds issues that automated tools may not detect.
Comprehensive Security Audit
Our comprehensive audit combines automated analysis, manual review, business-logic assessment, vulnerability classification, reporting, and remediation verification for complex contracts or protocols.
Re-Audit Services
We re-audit contracts after reported issues have been fixed to verify fixes and assess affected areas again.
Blockchain Platforms for Smart Contract Audits
Smart contract security varies by blockchain, programming language, virtual machine, and architecture. We audit contracts across major blockchain ecosystems based on their code, integrations, permissions, and deployment setup.
Ethereum
We audit Ethereum blockchain development based contracts for DeFi, tokens, DAOs, NFTs, and other Web3 applications, covering code, permissions, flows, and EVM risks.
BNB Chain
Our audits cover token, DEX, staking, and DeFi contracts, including ownership controls, external calls, and contract logic.
Polygon
We review Polygon blockchain development based contracts used for DeFi, gaming, NFTs, and DApps, with attention to permissions, integrations, and asset handling.
Avalanche
We audit Avalanche contracts for DeFi and Web3 applications, reviewing contract logic, permissions, integrations, and asset flows.
Solana
We assess Solana development based programs built with Rust, reviewing account handling, program instructions, authority controls, and transaction logic.
Multi-Chain
For multi-chain projects, we review contract versions, bridges, dependencies, configurations, and chain-specific integrations across deployments.
Projects That Need Smart Contract Auditing
Smart contract audits apply to more than DeFi protocols. Any Web3 product that places important business logic or asset movement on-chain can benefit from an independent security review.
Token Contracts
ERC-20, ERC-721, ERC-1155, governance, utility, and other token contracts can be assessed during token development for minting, burning, transfer, ownership, permissions, and supply-related risks
DEX, Staking, Lending, and Yield Farming Protocols
These systems often contain complex interactions with liquidity pools, rewards, pricing mechanisms, user deposits, withdrawals, and external dependencies.
DeFi Projects
Lending, borrowing, liquidity, yield, derivatives, and other financial protocols require careful security review throughout DeFi development, as contract logic directly control user assets.
Wallets and dApps
Wallet contracts and decentralized applications can contain permission, transaction, signature, and asset-management logic that deserves security assessment.
NFT and Gaming Projects
NFT marketplaces, gaming economies, asset contracts, minting systems, and reward mechanisms can be audited for ownership and transaction-related vulnerabilities across NFT development projects.
DAOs and Web3 Applications
Governance contracts, voting systems, treasury controls, proposal execution, and DAO permissions can introduce risks during DAO development when multiple contracts interact.
Bridges and Cross-Chain Applications
Bridges require particular attention to message validation, asset custody, verification mechanisms, permissions, and cross-chain development considerations.
Security Methodology and Audit Tools We Use
A smart contract audit combines automated analysis, testing, manual review, and remediation verification to identify common vulnerabilities and implementation-specific risks.
Static Analysis
Slither and similar tools identify known vulnerability patterns, unsafe coding practices, and suspicious code structures.
Fuzz Testing
Echidna or Foundry-based fuzzing tests contract behaviour against unexpected inputs, edge cases, and execution conditions.
Unit & Invariant Testing
Unit tests assess individual functions, while invariant testing checks whether key security and business conditions remain valid during execution.
Manual Code Review
Manual analysis examines architecture, permissions, state changes, economic logic, asset flows, and cross-contract interactions.
Exploit Scenario Analysis
Potential attack paths are assessed based on contract implementation, dependencies, transaction flows, and permission structures.
Remediation Verification
Corrected code and affected functions are re-tested to verify fixes and check for newly introduced security concerns.
Our Smart Contract Audit Process
We follow a structured review process that moves from code collection and automated testing to manual analysis, reporting, remediation, and final verification.
1. Codebase & Scope Review
We review the contract code, documentation, architecture, dependencies, and audit scope to define the areas requiring deeper analysis.
2. Architecture & Dependency Analysis
We examine contract relationships, external dependencies, permissions, integrations, and asset flows to understand the wider system.
3. Automated Security Testing
Automated tools are used to identify common vulnerabilities, coding issues, and suspicious patterns. Findings are then manually reviewed.
4. Manual Code & Logic Review
We examine contract functions, access controls, business rules, state changes, and interactions to identify implementation-specific risks.
5. Vulnerability Validation & Classification
Identified issues are validated and classified according to severity, potential impact, and affected components.
6. Audit Report
The findings, affected code, security impact, and recommended remediation steps are documented in a structured audit report.
7. Remediation & Re-Audit
After fixes are implemented, the updated code is reviewed to verify the reported issues have been resolved and check for newly introduced security concerns.
Why Choose Bitdeal for Smart Contract Audit Services
Smart contract security should reflect the product, architecture, and asset flows. As a blockchain development company, Bitdeal brings development expertise to each audit, reviewing contract logic, permissions, integrations, and deployment requirements. With 16+ years of expertise, 1500+ projects, and 150+ blockchain experts, Bitdeal provides automated analysis, manual code review, vulnerability assessment, reporting, remediation guidance, and re-audit support. Whether preparing for mainnet or a major upgrade, share your contract scope with Bitdeal to discuss the right audit approach.