How do estimated rewards work?

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This article describes rewards for liquid staking. See here for details of rewards for validator staking, or here for pooled staking.

When viewing your holdings, you'll see two variants of estimated rewards which are calculated slightly differently:

Estimated lifetime rewards: Lifetime rewards are an estimate of how many rewards you've received from the staking provider, calculated using a mix of on-chain data and third-party APIs. It may include rewards you may have received from holdings acquired outside of MetaMask Staking.
Estimated current rewards: Current rewards is the percentage of annual rewards you are predicted to receive, subject to change, based on a provider's performance over the last week, as calculated by each provider's API.