Oracle is usually a contract that retains track of balances from the DAO's validators to the beacon chain. The balances can go up due to reward accumulation and will go down on account of slashing and staking penalties. While this is great for selecting the most ample validators, it also https://www.industrialagency.org/blogs/245919/Lido-Finance-Unlocking-Liquidity-in-the-World-of-Staking