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The idea is that, under the old version, the transactions enforcing new rules look like "anyone can spend this transaction". Hence, old clients still accept the
by rocqua 6y ago
The idea is that, under the old version, the transactions enforcing new rules look like "anyone can spend this transaction". Hence, old clients still accept these transactions, they just don't verify them.
The new nodes do verify those transactions, which prevents unauthorized transactions from reaching the blockchain, as long as there are enough new nodes.
- sp332 6y agoI think the confusion is that the old nodes might create new chains that the new nodes will not follow. But with >90% of the hash power of the network on one side, the old-style blocks will be orphaned pretty quickly. And all clients will follow the longest chain they consider legitimate, so old-style blocks will just be ignored after they are orphaned.