I recently had one of my harddrives fail and that harddrive contained the blockchain. I am currently waiting for the network to catch up and had backups of my wallet. However, when I try and unlock my wallet from one of the backups, it is saying the passphrase is incorrect even though I was unlocking my wallet for staking consistently with the same password. My question is: Is the passphrase saved to the blockchain, or is is saved somewhere within the wallet? It had been a while before I last backed up my wallet, so I do not know if the password was different before.