Wallet Security Auditor Skill

Wallet Security Auditor

Overview

Security analysis tool for cryptocurrency wallets. Scans ERC20 token approvals, analyzes transaction patterns, calculates security risk scores, and provides actionable recommendations to improve wallet security.

Important: This is a read-only analysis tool. It does NOT execute transactions, manage private keys, or perform revocations.

Prerequisites

Before using this skill, ensure you have:

Python 3.8+ with requests library installed
Optional: ETHERSCAN_API_KEY environment variable for higher rate limits
Network access to blockchain RPC endpoints (public RPCs included)
Target wallet address (hex format, 0x...)

Instructions

1. List Token Approvals

Scan wallet for all active ERC20 token approvals:

cd ${CLAUDE_SKILL_DIR}/scripts
python wallet_auditor.py approvals <address> --chain <chain>

Options:

--chain: ethereum, bsc, polygon, arbitrum, optimism, base (default: ethereum)
--unlimited: Show only unlimited approvals
--verbose: Detailed output

2. Full Security Scan

Comprehensive security analysis including approvals, transaction history, and patterns:

python wallet_auditor.py scan <address> --verbose

Analyzes: 4. Active token approvals (unlimited, risky) 5. Transaction history patterns 6. Contract interactions (verified vs unverified) 7. Suspicious activity detection

3. Calculate Security Score

Get weighted security risk score (0-100, higher = safer):

python wallet_auditor.py score <address>
python wallet_auditor.py score <address> --json  # JSON output

Score components: 8. Approvals (40%): Unlimited, risky, stale approvals 9. Interactions (30%): Contract verification, flagged addresses 10. Patterns (20%): Transaction frequency, diversity 11. Age (10%): Wallet maturity

Risk levels: 12. 90-100: SAFE 13. 70-89: LOW 14. 50-69: MEDIUM 15. 30-49: HIGH 16. 0-29: CRITICAL

4. Analyze Transaction History

Review recent contract interactions and patterns:

python wallet_auditor.py history <address> --days 30

Detects: 17. Rapid approval patterns 18. Interaction bursts (many contracts in short time) 19. High failure rates 20. Dust attacks

5. Generate Revoke List

Get prioritized list of approvals to revoke:

python wallet_auditor.py revoke-list <address>

Flags: 21. Unlimited approvals to unknown contracts 22. Risky/flagged spenders 23. Stale approvals (>6 months)

6. Generate Full Report

Create comprehensive security audit report:

python wallet_auditor.py report <address> --output report.txt
python wallet_auditor.py report <address> --json  # JSON format

7. List Supported Chains

python wallet_auditor.py chains

Output

Security Score Report

╔═══════════════════════════════════════════════════════════════════╗
║                    WALLET SECURITY SCORE                          ║
╠═══════════════════════════════════════════════════════════════════╣
║  Overall Score:  [████████████████····] 82/100                    ║
║  Risk Level:     🟢 LOW                                           ║
╠═══════════════════════════════════════════════════════════════════╣
║  Component Scores:                                                ║
║    Approvals:     [██████████████······] 70/100                   ║
║    Interactions:  [██████████████████··] 90/100                   ║
║    Patterns:      [████████████████████] 100/100                  ║
╚═══════════════════════════════════════════════════════════════════╝

Approval Summary

Total active approvals count
Unlimited approvals flagged
Risky approvals with severity
Unique spenders and tokens

Risk Factors

[CRITICAL] Unlimited approval to unknown contract
[HIGH] Approval to flagged contract
[MEDIUM] Many unlimited approvals (>5)
[LOW] Interaction with unverified contract

Recommendations

Priority 1: Revoke risky approvals immediately
Priority 2: Review unnecessary unlimited approvals
Priority 3: Audit all approvals periodically

Error Handling

See ${CLAUDE_SKILL_DIR}/references/errors.md for comprehensive error handling:

| Error | Cause | Solution | |-------|-------|----------| | Address validation failed | Invalid format | Use 0x + 40 hex characters | | RPC timeout | Node unresponsive | Retry or use different RPC | | Rate limited | Too many requests | Add ETHERSCAN_API_KEY | | No approvals found | Wallet clean | Normal - no action needed |

Examples

See ${CLAUDE_SKILL_DIR}/references/examples.md for detailed examples.

Quick Security Check

# Check wallet approvals
python wallet_auditor.py approvals 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045

# Full security scan
python wallet_auditor.py scan 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 --verbose

# Get security score
python wallet_auditor.py score 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045

# Check other chains
python wallet_auditor.py approvals 0x... --chain polygon
python wallet_auditor.py approvals 0x... --chain arbitrum

Generate Audit Report

# Text report
python wallet_auditor.py report 0x... --output security_audit.txt

# JSON for integration
python wallet_auditor.py report 0x... --json --output audit.json

Resources

revoke.cash: Web UI for revoking approvals
Etherscan Token Approval Checker: View/revoke on block explorer
Etherscan API: https://docs.etherscan.io/api-endpoints
ERC20 Approval Event: Topic 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
GoPlus Security API: Additional contract risk data

Agent Skills: Wallet Security Auditor

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Skill Files