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I’m not sure about Ethereum PoW, but in Bitcoin you absolutely pick the chain with the most work not the longest chain that’s a consensus rule. This is how bitc
by doomroot 4y ago
I’m not sure about Ethereum PoW, but in Bitcoin you absolutely pick the chain with the most work not the longest chain that’s a consensus rule. This is how bitcoin/PoW avoids weak subjectivity, the problem described by the parent comment.
- betwixthewires 4y agoThe two are equivalent if each hash is valid. The only way for a longer chain to have less work is if there's a sudden, protocol violating drop in the difficulty in a block header. If this happens then you know that chain is not the valid chain.