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A comment on Show HN: HN for Ethereum directly on the Blockchain.

Re:Show HN: HN for Ethereum directly on the Blockchain by salomelunarojas on Tuesday July 12, 2016 @10:23AM (#12079206)
But if this is running on Ethereum, who is paying for it? Doesn't it need "gas"?
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Re:Show HN: HN for Ethereum directly on the Blockchain by tomw1808 on Wednesday July 13, 2016 @04:50AM (#12084839)
Better late than never:

It needs gas only when there is a change (add/remove), it doesn't need gas to read.

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