Add check to script to make sure user is on a farmer

[steppsr]

Add check to script to make sure user is on a farmer. If user is on a harvester, the chia wallet commands will not return the needed data.

[Jacek-ghub]

It would be nice to somehow check whether port 9256 is open. On Linux, openssl can be used, and actually test for chia cert. Although, I don't know what could be done on Win side to do a similar test.

Although, as mentioned on chiaforum, one can ssh forward port 9256 to a remote box and run those scripts from there. This way, regardless of what OS is the (remote) node, the script can run on whatever OS is convenient for the user.

[steppsr]

This script isn't using the RPC API, it is running CLI commands and capturing the output. Using RPC in PowerShell required merging the Cert and Key into a PFX file, which you need additional software to complete (such as OpenSSL). I didn't want to require the the user to install more software which I why I used the CLI.

However, I should be able to use PowerShell to see if the Wallet port is open. Then if not I can give a graceful message to the user.

Test-NetConnection -ComputerName 127.0.0.1 -Port 9256