x402 payments on base sepolia

[adambalogh]

add support for llm inference payments on base sepolia

[adambalogh]

Review

🔴 Issues to Fix

1. Version mismatch between pyproject.toml and requirements.txt

• pyproject.toml has og-test-v2-x402==0.0.5
• requirements.txt has og-test-v2-x402==0.0.6

Pick one (probably 0.0.6 if that's latest).

2. README references wrong filename

• Docs say approve_permit2.py but the file is x402_permit2.py

3. Missing trailing newline in requirements.txt

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🟡 Suggestions

4. Code duplication in llm.py
make_request() and make_request_v2() share ~80% of their logic. Consider extracting common payload building and response parsing.

5. Hardcoded chain ID
"eip155:84532" appears 4 times — extract to a constant like BASE_SEPOLIA_CHAIN_ID.

6. Private attribute access
client.alpha._wallet_account.address in examples is brittle. Consider exposing a public property.

7. Missing type hint
_parse_sse_response should have -> AsyncGenerator[StreamChunk, None] return type.

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✅ What's Good

• Clean network routing separation
• Permit2 check fails early with clear error message
• CLI changes are backwards compatible (defaults to og-evm)
• Proper async/streaming support for both networks

Overall: functional, but fix the version mismatch and README filename before merging.

[adambalogh]

left 1 q

[adambalogh]

i don't think this field exists on client.alpha