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Four documents, the same five questions.

No throughput league table and no yield. The cells are what this library is willing to say about the text.

QuestionAccount Abstraction Using Alt Mempool
What the text proposesSmart-contract accounts that propose UserOperations, bundled by a separate mempool, without a change to Ethereum's consensus. Paymasters can sponsor gas. The validation rule lives in the account, which is the point and the risk.
Who may writeVitalik Buterin, Yoav Weiss, Dror Tirosh, Shahaf Nacson, Alex Forshtat, Kristof Gazso and Tjaden Hess
What is settledA UserOperation carries the sender, the call, and the signature-like data the account expects.
Load-bearing assumptionThis is not consensus account abstraction. A node does not have to understand UserOperations.
What this library says afterwardsA paymaster can refuse, censor, or be empty. Sponsored gas is not a right.
RightsOfficial external source only