Timespan: Jul 12—Jul 16, 2021. Summary Lido DAO is going to change withdrawal credentials (WC) so that they point to an upgradeable smart contract instead of a BLS key. This will allow for more decentralization as withdrawal logic will be controlled by LDO holders via DAO voting instead of withdrawals being initiated by holders of BLS key parts. The change is going to take place on the week of 12.07–19.07.2021. The already submitted but unused deposit data will be pruned. Lido team will provide you the list and the starting index of these pruned deposit data and propose the DAO to compensate the gas fees paid for submitting them. You will need to generate a new chunk of deposit data using the new withdrawal credentials. You may reuse the validator keys that were used in the pruned deposit data, but you'll still need to re-generate deposit data since it includes WC and will require re-signing after the WC change.