3 ms·

Then that block is rejected by the upgraded clients and miners.

• TekMol 6y ago
  That is exactly my point. This creates a chain that is valid with the pre-taproot software and invalid with the post-taproot software. Both will hold value. And my question is how funds like Grayscale (And 21shares, exchanges, etc) will handle this.
  • wcoenen 6y ago
    This is not possible with a miner activated soft fork, because the upgraded fork will have the longest chain. This is guaranteed by the activation process, which requires a supermajority of miners to agree. This longest chain is valid for both upgraded and not-upgraded participants. So that's the consensus that everybody follows.
  • drexlspivey 6y ago
    All the nodes (even the old ones) run on the rule that the longest chain (the one with more work) is the valid one so the chain with the one invalid block won’t be longest because no one will build on it. As a result even the old nodes which don’t know the new rules won’t accept the blocks based on the longest chain rule.