witness

A stateless node receives a witness alongside each block, containing all the data needed to verify state transitions.无状态节点会收到与每个区块同行的见证数据，其中包含验证状态转换所需的所有数据。

Verkle trees produce smaller witnesses than Merkle trees, making stateless client operation more practical.Verkle 树产生的见证数据比默克尔树更小，使无状态客户端的运行更加切实可行。