Yes — there is a user guide (opens in a new tab).
There's no minimum amount, you can stake any.
There's no change interval, you can stake any amount.
No, you can stake at your discretion, unlimited. You should know that currently staking starts once 32 ETH are accumulated, so if your stake is > 32 ETH, it’ll be divided into chunks and the rule will apply to each of them.
The minimum amount to unstake is 0.5 ETH.
Unstake time on Ethereum is dynamic and depends on the unstaking queue. You can always find the current unstake time on the How to Unstake (opens in a new tab) and Unstake ankrETH (opens in a new tab) pages.
aETHb is not actively supported anymore. We recommend you switch your aETHb for ankrETH (ex-aETHc) (opens in a new tab).
ankrETH (ex-aETHc) is a reward-bearing token, meaning its quantity stays the same from the moment of staking. Instead, it appreciates in value in relation to ETH, so the redemption price of 1 ankrETH will grow over time because of reward accumulation.
ankrETH (ex-aETHc) will increase in value only, daily. arnkETH rewards are built into the token. Effectively, your rewards accumulate daily as ankrETH grows in value to ETH.
Ankr takes a 10% technical service fee from the staking reward to cover for the provided services and operations.
The only risk for stakers is missing out on rewards during any time a validator they staked with is slashed. Slashing is a protocol-level penalty associated with a validator failure if it validates an invalid transaction or goes offline. The delegated staked ETH is not slashed — slashing impacts only the self-stake of the validator. Ankr only delegates to trusted and reputable validator nodes to avoid any validator that would act maliciously.
You can trade them in the listed liquidity pools on ANKR DeFi:
You can also use your Liquid Staking tokens to:
Add liquidity on DEXs (opens in a new tab) and earn from commissions taken when users swap tokens, using the liquidity pool you're a part of.
Yield farm (opens in a new tab) and earn additional rewards in the form of liquidity pool tokens and further farm them.
Put your tokens in a vault (opens in a new tab) and automatically earn additional rewards in the form of one of both assets from the pair.
ankrETH (ex-aETHc) only changes in value, which is why the amount of ankrETH you get when staking is calculated by the formula
stake * exchange_ratio. The exchange ratio is calculated like this:
totals_supply_of_ankreth / (total_staked_eth + total_rewards_for_staked_eth - total_unstaked_ankreth).
Yes, you can use Ledger Nano cold wallets through MetaMask. Visit the Ledger's guide on connecting Ledger through MetaMask (opens in a new tab).