I don't think it makes sense to talk about enforcing a smart contract with law enforcement. You could perhaps have a legal contract that goes along with the sm

I don't think it makes sense to talk about enforcing a smart contract with law enforcement. You could perhaps have a legal contract that goes along with the smart contract, and which refers to the smart contract, and this legal contract could be enforced through law stuff. But, I think that's a different idea than the law backing smart contracts.