Quote from: Come-from-Beyond on August 02, 2016, 03:41:09 PM

Quote from: mcelrath on August 02, 2016, 02:20:22 PM

This isn't a need: miners will contribute to the highest work braid/chain simply because that is the one most likely to have other people contribute to it. No extra incentive is needed. If there exist two childless beads (blocks), it's in my best interest to name them both as parents. That generates a higher work braid. Naming only one of them creates a lower work braid.

This is not that simple, as Selfish Mining paper showed, a more sophisticated strategy may be more profitable.

Selfish mining works because of the asymmetry between profit of a block that gets orphaned and one that ends up in the main chain. There's no reason to have orphans at all with a braid. Withholding a block doesn't buy you anything.

This is a concept I put forth in my most recent talk about braids: "equal pay for equal proof-of-work". Selfish mining is killed by a combination of braiding (no more orphans), and removing the asymmetry by ensuring all valid PoW hashes earn a block reward.

mcelrath

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