<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.benki kuu iliyotolewa cryptocurrency unaweza uwezekano kuleta mafanikio ya kiuchumi ya ustawi kwa canada na marekani, kulingana na benki mtafiti mkuu.  <response>: central bank-issued cryptocurrency can potentially bring economic welfare gains for canada and the u.s., according to a central bank researcher. 