The Riksbank has published a report detailing the fourth phase of testing for the e-Krona. Throughout the pilot phase, which spanned from 2020 to 2023, the bank tested the e-Krona's fundamental use cases as a retail currency accessible to the general public. This iteration of the e-Krona was developed on the Corda distributed ledger platform by R3, with the central bank serving as a notary node responsible for verifying and finalizing transactions.