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For 0x02 (Pectra) validators, use our new endpoint, which now supports batch creations

Creates new validators and returns a staking transaction to stake ETH

Notes:

Once set, the withdrawal address of a validator cannot be changed.
Maximum 250 validators can be created per request.
If you are restaking via Eigenlayer, your withdrawal address is set to your EigenPod address.
Depending on how you plan to sign the staking transaction we provide 3 transaction formats in the response See the guide.