During the auction, candidates need to set the amount of deposit they would like to commit, according to which the system will rank in real time. By the end of the auction, the top n will be selected, with the n-th committed deposit amount being used as the final deposit amount for each selected keeper. During the auction stage, the deposit can be retrieved at any time. Once auction ended, the mint stage will launch at which the Keepers' collateral will be migrated to the Vault of Keeper Network and each Keeper operates his/her node of the Keeper Network.