notary change transactions from validating to non-validating notaries

问题

while doing a notary change transaction from validating notaries to a new set of non validating notaries, how does the new set of non-validating notaries learn about the previous transactions?.

Do they get only the hashes of previous transactions or the entire transaction dependency graph?

回答1:

The new notary does not learn about the past transactions at all.

Instead, we have the following process:

• A transaction with hash 2772BE and notary NotaryA is committed to the ledger
• Someone wants to transfer the first output state of this transaction (denoted <2772BE, 0>) to NotaryB
• They form a notary change transaction with a single input, <2772BE, 0>. Let's say the hash of this notary change transaction is 35D0A5
• NotaryA signs this transaction, marking its input <2772BE, 0> as spent
• However, this transaction also creates one output state, <35D0A5, 0>, pointing to NotaryB
• <2772BE, 0>, which pointed to NotaryA, is now spent. But <35D0A5, 0>, which points to NotaryB, is unspent

In this way, we have transferred the state to a new notary in a way that prevents double-spends.

来源：https://stackoverflow.com/questions/50136031/notary-change-transactions-from-validating-to-non-validating-notaries