#美国加征关税 adopts a unified contract address: OP_NET introduces a unified contract address, associating contracts with adjusted public keys as part of its unified account system. This system eliminates the complexity of managing multiple address formats, simplifying interactions for all address types and helping to maintain consistency of contract addresses and related statuses across different nodes.

• State recorded based on the Bitcoin network: OP_NET operates on the Bitcoin network, and all transactions originating from OP_NET and submitted to Bitcoin will mark the string "bsi" in any data field and be directed to an unspendable address abstracted as a contract address. The protocol detects these transactions, executes them, and generates a transaction receipt containing a detailed report of state changes, thereby recording contract state changes on the Bitcoin network, leveraging the distributed ledger characteristics of the Bitcoin network to ensure consistency and immutability of the state.