Define `alphabetContracts` type that map glagolic letters to smart contract
addresses. Implement constructor and all methods which are going to be used
in IR processing.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Define `glagolicLetter` enumeration of the Glagolitsa alphabet letters.
Implement `configString` method that returns config-compatible string format
of the letters.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
