adding description string to Web3Error

[GabCas]

Hi Alex,

from issue: BANKEX/web3swift#194

I've added a String description to the Web3Error enum in Web3.swift. Then modified whenever an error was created that required the description.

[shamatar]

Hello @GabCas

You I like your idea with better descriptions for errors, although can you try to make them more informative? Probably with some hint what user should do to try to fix it?

Sincerely, Alex

[GabCas]

Hi Alex,

for inputError, nodeError and processingError I'm attaching the same error description that you were logging which are very descriptive error messages so the user can know what to do to fix them. These in particular are the error messages I want to show the user instead of a generic error like "web3swift.Web3Error error 1."

Do you have in mind a specific error that requires a more detailed description?

Thanks!

[shamatar]

Hello @GabCas

I'll fix descriptions when it's possible by myself. I think most valuable for users would be either "missing parameter" or "transaction is likely to revert".