attestation

Validators must submit an attestation each epoch or face inactivity penalties.验证者必须在每个纪元提交一份证明，否则将面临不活跃惩罚。

Attestations aggregated across a committee form the basis of Ethereum's fork-choice and finality rules.在一个委员会内聚合的证明构成了以太坊分叉选择规则和最终确定性规则的基础。