A less minimal TOTP generator based on MinTOTP.

• Prompts for the TOTP key.
• Uses Python's getpass to read the TOTP key without echoing it.
• Ignores all spaces in the TOTP key.
• Reads only one TOTP key at a time.
• Avoids printing Python backtraces if interrupted with Ctrl+C or if an invalid base32 character is entered for the TOTP key.
• Prints the number of seconds remaining for the lifetime of the generated TOTP code.
• If the generated TOTP code is about to expire, additionally prints the next TOTP code.

Auxiliary files such as build and test files also have been removed.

$ totp
TOTP key: <unechoed input>
950840 (24s remaining)