Chain Provider catch Exception

Hi,

Currently, the chain provider only logs the exceptions, there is no way to catch the exceptions and we always get an empty AddressCollection in case something went wrong. There is no way to know if the collection is empty because there were no results or if an error occurred.

A simple customized solution would be to extend the class Chain and throw the exception but it's not possible since it's final. All I can do is to replicate the class (not best solution).

If there is a workaround about this I would like to hear about it, otherwise I guess it must be implemented a way to catch the erros.

Thank you.

首先阅读最终的 Chain 类及其 provider 执行路径，以了解当前异常在哪里被记录并转换为空的 AddressCollection。检查附近关于 Chain provider 行为的测试，然后将完成标准定义为：向调用方提供一种可靠的方式来区分无结果和 provider 错误，并通过测试覆盖该行为。