Watchers

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  Sebastian Marcotte

  https://bitcoin-review.net/%EB%8C%80%EC%B6%9C%EC%95%B1%EC%9D%98-%EB%AA%A8%EB%93%A0-%EA%B2%83-%EB%8C%80%EC%B6%9C%EB%AC%B8%EC%9D%98%EB%B6%80%ED%84%B0-%EA%B3%84%EC%82%B0%EA%B8%B0-%ED%99%9C%EC%9A%A9%EA%B9%8C%EC%A7%80/