Self-Audit: x402_config.py (#6460)

[FlintLeng]

@/dev/stdin

[yanghaiboabc]

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What I reviewed:

• https://github.com/Scottcjn/rustchain-bounties/blob/main/README.md
• Self-Audit: x402_config.py (#6460) #7434

Why I liked it:
The task is well-documented and the instructions are clear. The bounty system provides good incentives for contributors.

Wallet: yanghaiboabc (RTCbd3a6d2ebcc29a01704c2afc2dde87ac62a6c122)

I received RTC compensation for this review.

[haoyousun60-create]

Self-Audit: x402_config.py

Wallet: RTC4642c5ee8467f61ed91b5775b0eeba984dd776ba
Module reviewed: node/x402_config.py
Lines reviewed: whole-file (91 lines)

1. LOW: Treasury addresses default to empty string

• Severity: low
• Location: x402_config.py:18-19
• Description: BOTTUBE_TREASURY and BEACON_TREASURY default to empty string if environment variables are not set. If a payment is processed with an empty treasury address, funds could be lost.
• Impact: Potential fund loss if x402 payments are processed without configuring treasury addresses.

2. LOW: All prices set to '0' (free mode)

• Severity: low (intentional)
• Location: x402_config.py:25-33
• Description: All prices are set to '0' for initial testing. This is documented and intentional, but there's no runtime warning when operating in free mode.
• Impact: No revenue generation until prices are updated. Consider adding a startup warning when all prices are zero.

3. LOW: CDP credentials stored in environment variables

• Severity: low (positive)
• Location: x402_config.py:36-37
• Description: CDP API credentials are properly loaded from environment variables rather than hardcoded. This is the correct approach for secret management.

I received RTC compensation for this review.

[BossChaos]

/claim RTC6d1f27d28961279f1034d9561c2403697eb55602

[BossChaos]

Self-Audit Report — x402_config.py + beacon_x402.py

Wallet: RTC6d1f27d28961279f1034d9561c2403697eb55602
PR: Scottcjn/Rustchain#4176

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Finding 1: X402_CONFIG_OK default initialization (MEDIUM)

File: beacon_x402.py lines 22–34
Problem: X402_CONFIG_OK was only assigned inside try (True) and except ImportError (False). A non-ImportError exception (e.g. SyntaxError, AttributeError from a broken x402_config.py) left X402_CONFIG_OK undefined → NameError at call sites. Even a subtle import-side effect could flip all premium endpoints to free mode.
Fix: Initialize X402_CONFIG_OK = False before try. Changed except ImportError to except Exception.

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Finding 2: sqlite3.Row .get() AttributeError (MEDIUM)

File: beacon_x402.py line 232
Problem: relay.get("coinbase_address") — sqlite3.Row does not have a .get() method (unlike dict). This raises AttributeError at runtime, falling through to the except block silently. Result: every relay agent's wallet lookup fails and returns None — beacon_wallets table check is skipped entirely.
Fix: Changed to relay["coinbase_address"] bracket access.

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Finding 3: Payment logging silently swallowed (MEDIUM)

File: beacon_x402.py lines 140–142
Problem: Payment log failures in _check_x402_payment() logged only at log.debug level. Production deployments typically disable debug logs → audit trail gaps go completely undetected. No alert, no retry, no record.
Fix: Changed to log.warning.

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Finding 4: CDP credential weak validation (LOW)

File: x402_config.py line 62
Problem: has_cdp_credentials() checks bool(CDP_API_KEY_PRIVATE_KEY). An empty string "" is falsy (good), but " " or "placeholder" passes truthiness check. Misconfigured credentials could silently fail during wallet creation.
Fix: Validate key format (starts with 0x, correct length) or use regex.