fix: 'nonce too low' errors during testing

[antazoey]

What I did

probably another result of bad perfs, but we still need to await for nonces to increase when req confs is 0.
I added a test to ensure this doesnt break again.
Also added .confirmed property to receipt which is going to be useful later.
problems were rather anomalous but putting back 1 RPC call aint the end of the world

How I did it

• put back nonce-await at top of method
• del comment
• add test
• use helper methods to pot. allow providers to make their own receipts with differing behavior

How to verify it

Checklist

• All changes are completed
• New test cases have been added
• Documentation has been updated