Fatalf formats a message to standard error and exits the program.

GetPassPhrase displays the given text(prompt) to the user and requests some textual data to be entered, but one which must not be echoed out into the terminal.

GetPassPhraseWithList retrieves the password associated with an account, either fetched from a list of preloaded passphrases, or requested interactively from the user.

MakeAddress converts an account specified directly as a hex encoded string or a key index in the key store to an internal account representation.