Crate that provides role based access control mechanism, where there is an account (role member) that can be granted exclusive access to specific functions.
Grants specified tole to specified account.
Setups new role.
Removes role access for specified account.
Removes sender access to role.
Sets new tole admin for role.
Validates that only specified role member can have access.
Returns either address has specified role or not.
Returns admin role of specified role.