Now, problems that are NOT solved by ERC-4337!
* Letting existing EOAs send ops that get paid for by third parties
* Upgrading existing EOAs to contracts
* Integration with transaction inclusion lists (an anti-censorship feature in PBS)
现在，ERC-4337 无法解决的问题！
* 让现有的 EOA 发送由第三方支付的操作
* 将现有的 EOA 升级为合同
* 与交易包含列表集成（PBS 中的反审查功能）