EIP-2183: Increase the Clique MIN_WAIT for out-of-turn blocks

[soc1c]

Edge-cases in Clique-based networks were discovered that eventually lead the chain to halt. One of the reasons is that some clients publish out-of-turn to the network too fast. EIP-2183 addresses this and encourages clients that implement Clique to streamline their block-authoring logic based on this proposal.

resolves goerli#16

resolves goerli#15

partially replaces #1955

[karalabe]

This EIP introduces a minimum waiting time for all out of turn blocks, but I'm not sure that alone is enough to solve the issue. If an in-turn signer is offline, we'll have N other out of turn signers all waiting for the exact same period to publish their blocks, and they'll flood the network at that point. Miners could still have the current random wait included too, but if you figured that's not enough for propagation in the first place, then this EIP won't solve the issue properly either.

Hmmm, my other concern with this proposal way back was that I thought that for every out of turn block, you bump the block time to 1.5x. Thinking about it now however I kind of realize that you still keep the same original time stamp, you just publish the block later. So in theory, this will result in a 23 second block out of turn, but then all consecutive out of turn blocks at 15 secs and finally a 7 second block in-turn. So I guess this removes my original concern. However I think this would be important to emphasize in the EIP.

[github-actions]

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[github-actions]

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