# Blockchain Security and Smart Contract Audit

> From $60K · Offensive Security · https://cisomarketplace.services/services/blockchain-security-and-smart-contract-audit

Comprehensive security assessment for blockchain implementations and smart contracts, including code audits, cryptographic review, and security architecture evaluation.

## In scope

- Smart contract code audit
- Cryptographic implementation review
- Consensus mechanism assessment
- Network security evaluation
- Wallet security review

## Deliverables

- Smart contract audit report
- Security architecture document
- Vulnerability assessment findings
- Remediation guidelines
- Security best practices
- Monitoring recommendations

## Tiers

### Core Blockchain Assessment: $60K

Manual and automated audit of up to 1 contract repository, roughly 2,500 lines of contract code on one chain, plus a review of the wallet and key handling around it. One fix-review round.

Limits: repositories 1, wallets 3

Includes:
- Line-by-line smart contract audit of 1 repository
- Automated analysis and manual exploit attempts
- Wallet and key management review for up to 3 wallets
- Audit report with remediation guidelines
- One fix-review round

Excludes:
- Cryptographic implementation review
- Consensus mechanism and node network assessment
- Multi-chain or bridge contracts
- Custom tooling and monitoring

### Advanced Blockchain Assessment: $90K

Up to 3 repositories, roughly 6,000 lines of contract code: everything in the basic tier, a cryptographic implementation review, consensus mechanism assessment and node network security evaluation. Two fix-review rounds.

Limits: repositories 3, wallets 5

Includes:
- Everything in the basic tier
- Cryptographic implementation review
- Consensus mechanism assessment
- Node and network security evaluation
- Two fix-review rounds

Excludes:
- Custom detection tooling
- Post-deployment monitoring
- Bridges and cross-chain messaging beyond the 3 repositories

### Enterprise Blockchain Assessment: $120K

Full-scope blockchain security program including custom tool development and continuous monitoring

Limits: repositories 5, wallets 10

Excludes:
- Bug bounty program management
- Formal verification of the full codebase

## Terms

Starting price shown is the lowest published tier. A written proposal fixes scope, tier and price before anything is signed. Timeline is set in the SOW.

Scope this engagement: https://cisomarketplace.services/scope?service=blockchain-security-and-smart-contract-audit