ETH Staking: Who Really Owns Your Funds?
Staking ETH is not just about earning interest, but also about understanding who truly owns your funds. The Ethereum protocol splits permissions into two distinct halves at the consensus layer: the Signing Key and Withdrawal Credentials. The former is used for signing validations and must remain online 24/7, while the latter controls withdrawal rights and can reside in a cold wallet or mnemonic phrase.
Non-custodial staking solutions like imToken work by having the node service provider hold the Signing Key, responsible for server maintenance and network defense. However, they do not have access to the Withdrawal Credentials, which remain with the user. This means that even if the node operator goes offline or acts untrustworthily, users can still control their funds.
The Ethereum protocol itself also plays a crucial role in ensuring user control over their staked ETH. Once ETH enters the validator, no party can transfer it at will like a regular wallet balance. The protocol sets rules for when it can be activated, exited, and withdrawn, all of which must be followed.