在Corda中，哪些数据发送到非验证公证服务? [英] In Corda, what data is sent to a non-validating notary service?

问题描述

这个问题经常在对话中出现:当将Corda交易发送到非验证的公证服务进行最终确定时，公证服务可以看到并推断出什么世界?

This question frequently comes up in conversations: When a Corda transaction is sent to a non-validating notary service for finalisation, what can the notary service see and deduce about the world?

推荐答案

在将交易发送给非验证公证人之前，将其过滤如下:

Before sending a transaction to a non-validating notary, it is filtered as follows:

stx.buildFilteredTransaction(Predicate { 
    it is StateRef || it is TimeWindow || it == notaryParty 
})

(请参阅主要Corda存储库中的NotaryFlow.kt).这意味着非验证公证人只会看到:

(see NotaryFlow.kt in the main Corda repo). This means that the non-validating notary will only see:

• 任何输入，以StateRef s
的形式
• 时间窗口(如果存在)(因为公证人也是时间戳记机构)
• 交易公证人的身份

• Any inputs, in the form of StateRefs
• The time-window, if it exists (since the notary is also the timestamping authority)
• The identity of the transaction's notary

因为该交易是一棵Merkle树(请参见 https://docs.corda.net/_images/merkleTree.png )，尽管其余组件已被删除并且公证人无法看到，但是一旦应用了公证签名，交易的内容就无法更改.

Because the transaction is a Merkle tree (see https://docs.corda.net/_images/merkleTree.png), although the remaining components have been removed and can't be seen by the notary, the contents of the transaction can't be changed later once the notary signature has been applied.

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