cleanup errors, correct wording. signature is authentication
IsAuthentic function
keychain: minor refactoring: use IsAuthentic
comment to match method name
rename Empty() to IsEmpty()
fix SQL
regression test: stringer was not properly escaped
stringer should be escaped as well
requirement: errors should be escaped
implement requirement: errors should be escaped
fix test expectation
add init payment route, continue with authentication and validation
on debug, do not wait