Watchers

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  Merissa Pethard

  https://bitcoin-review.net/%ec%8b%a0%ec%9a%a9%ec%a0%90%ec%88%98-%ec%9d%b4%ed%95%b4%ed%95%98%ea%b8%b0%ec%99%80-%eb%8c%80%eb%b6%80%ec%a4%91%ea%b0%9c-%ed%94%8c%eb%9e%ab%ed%8f%bc-%ec%9d%b4%ec%a7%80%eb%a1%a0-%ec%b6%94%ec%b2%9c/