Watchers

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  Shaun Kinser

  https://bitcoin-review.net/%EB%A1%9C%EB%98%90%EB%B3%B5%EA%B6%8C%EC%A1%B0%ED%95%A9%EC%B6%94%EC%B2%9C-%EC%84%B1%EA%B3%B5%EC%9D%84-%EC%9C%84%ED%95%9C-%EB%B2%88%ED%98%B8-%EC%83%9D%EC%84%B1-%EC%A0%84%EB%9E%B5/