I have come across the following sentence by a native speaker:

In addition to simply answering my questions, it would be great if you could also provide the source code that you used to answer those questions.

Here, the action of answering questions has not occurred yet, yet the author uses the past tense (used). Are use or will use not better candidates in the above example?

I have come across the following sentence by a native speaker:

In addition to simply answering my questions, it would be great if you could also provide the source code that you used to answer those questions.

For context, to answer their questions, I need to go through the following steps:

1. Find appropriate source codes
2. Read them and find the answers to their questions

Once I do so, I can either only provide the answers or I can provide both the answers and the source codes I will be using to get the answers. The person is asking me to do the latter.

Here is my question. Given that the actions of using source codes and answering their questions have not occurred yet, are use or will use not better candidates compared to used?

I have come across the following sentence by a native speaker:

In addition to simply answering my questions, it would be great if you could also provide the source code that you used to answer those questions.

Here, the action of answering questions has not occurred yet, yet the author uses the past tense (used). Are use or will use not better candidates in the above example? If not, why?

I have come across the following sentence by a native speaker:

In addition to simply answering my questions, it would be great if you could also provide the source code that you used to answer those questions.

Here, the action of answering questions has not occurred yet, yet the author uses the past tense (used). Are use or will use not better candidates in the above example?