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      "title": "ECA幣的錢包備份",
      "body": "<html>\n<p>剛剛講完coinsmarkets.com的停機故事，接下來要說錢包的備份。從交易所的停機事件中，我們可以發現，當加密貨幣放在交易所，而交易所又不讓你自由操作時，基本上你的資產就如同被凍結了一樣。為了避免被這些「中心化」的交易所綁住手腳，或是甚至「惡意倒閉」或「駭客入侵」，養成「錢放自己錢包的習慣」是一個好主意。</p>\n<blockquote>把加密貨幣放在交易所，風險不會比放在自己的電子錢包還低</blockquote>\n<p>而安裝電子錢包，這個難度不高，現在都很傻瓜化了。不過，安裝完，下一步的「備份」，可才是重點。這裡我們以electra(ECA幣)為例說明。</p>\n<p>打開上方的「Help」裡面的「Debug window」，會彈出來以下的視窗，點選「Console」</p>\n<p>在下方的白色輸入欄位裡面，打上「dumpprivkey+空白+自己的ECA錢包地址」</p>\n<p><img src=\"https://s9.postimg.org/pahb1m6z3/2018-02-25_23.46.32.png\" width=\"1216\" height=\"800\"/></p>\n<p>接下來彈出來的就是「private key」啦，請copy下來保管好，以後換電腦時，可以透過這個「private key」把錢包「搬」過去喔</p>\n<p><br></p>\n</html>",
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      "author": "ian8ko",
      "permlink": "coinsmarkets-com",
      "title": "coinsmarkets.com 停機始末",
      "body": "<html>\n<p>今天coinsmarkets.com有一個大消息！</p>\n<p>從1月初coinsmarkets.com無預警的關閉後，此交易所的網頁就開始時連的上，時連不上</p>\n<p>過程中，coinsmarkets.com在1月19號，發表了一篇聲明</p>\n<p><img src=\"https://images-ext-2.discordapp.net/external/C9orH9scEbKeCO_Vh1BxhV8OiJj3yINA7we57NPaDu4/https/i.gyazo.com/5c4f447e140451240b39bf028dc64879.png\" width=\"1275\" height=\"765\"/></p>\n<p>大意是，因為團隊成員的離職，加上electra的交易暴增所造成的流量，讓他們的DataBase有異常，進而交易無法進行，對「交易所」來講，當然就是被迫「停機維修」了。</p>\n<p>從下面可以看出，1/1開始，流量往上衝，而1/4開始，交易所開始不穩，網站會時不時連不上，造成流量開始下滑，而到了1/5開始，交易所完全下線，而在當時，electra又只有「一個」交易所提供交易，結果就是coinsmarkets.com一停機，瞬間沒有任何地方可以交易electra，讓coinmarketcap.com抓不到資料，而出現一個垂直下滑到曲線。（到今天扣除coinsmarkets.com，electra已經在4個交易所上架）</p>\n<p><img src=\"https://s9.postimg.org/wwghll4wf/2018-02-25_21.53.50.png\" width=\"1280\" height=\"626\"/></p>\n<p>對比Binance.com(幣安)在2/8發生的「無法連線」事件，幣安的CEO直接第一時間在Twetter上面更新進度（很諷刺的是，他上一篇Tweeter是他被「富比世雜誌」專訪)</p>\n<p><img src=\"https://s9.postimg.org/gudyeqfcf/2018-02-25_21.11.32.png\" width=\"809\" height=\"800\"/></p>\n<p>讓我們紀錄一下他發Tweeter的數量：</p>\n<ul>\n  <li>2/8-----3則</li>\n  <li>2/9-----5則</li>\n  <li>2/10----3則，服務上線，外加一份事件報告</li>\n</ul>\n<p>結果，這次「幣安交易所」的無預警停機事件，在3天內結束，且幣安還提供手續費打折補償幣友們。事後，當然那些幣友們還是繼續在該交易所交易，而BNB幣（幣安幣）竟然事後也小漲了一波。</p>\n<p>話題回到coinsmarkets.com，在1/19的聲明發表之後，先是說hosting的問題，後來hosting搞定了，換說是DB的問題，直到2/24，無論是「交易」，「入幣」，「出幣」，都是沒辦法執行的。但是根據部分用戶指出，他們可以看到他們的錢包的數量是不動的，也就是說，在停機的這50天中，coinsmarkets.com似乎並沒有挪用用戶的資產。</p>\n<p>在2/24，electra幣的社群內，出現了這麼一篇聲明</p>\n<p><img src=\"https://s9.postimg.org/je9l8wfrz/2018-02-25_21.44.17.png\" width=\"954\" height=\"616\"/></p>\n<p>在這篇聲明的幾個小時之後，coinsmarkets.com也同步更新了狀態，說明會優先「允許electra的出幣」（該交易所的其他幣會陸續開放出幣）</p>\n<p>到了2/25，最新的聲明出來了</p>\n<p><img src=\"https://s9.postimg.org/94769u5dr/2018-02-25_21.47.50.png\" width=\"1280\" height=\"363\"/></p>\n<p>經過了50天，交易所才啟用了「部分」機能。而electra也經過了特別的價格波動，以此紀錄</p>\n<p><img src=\"https://s9.postimg.org/hnqk7nb67/2018-02-25_21.51.19.png\" width=\"1280\" height=\"631\"/></p>\n</html>",
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      "title": "coinsmarkets.com 停機始末",
      "body": "<html>\n<p>今天coinsmarkets.com有一個大消息！</p>\n<p>從1月初coinsmarkets.com無預警的關閉後，此交易所的網頁就開始時連的上，時連不上</p>\n<p>過程中，coinsmarkets.com在1月19號，發表了一篇聲明</p>\n<p><img src=\"https://images-ext-2.discordapp.net/external/C9orH9scEbKeCO_Vh1BxhV8OiJj3yINA7we57NPaDu4/https/i.gyazo.com/5c4f447e140451240b39bf028dc64879.png\" width=\"1275\" height=\"765\"/></p>\n<p>大意是，因為團隊成員的離職，加上electra的交易暴增所造成的流量，讓他們的DataBase有異常，進而交易無法進行，對「交易所」來講，當然就是被迫「停機維修」了。</p>\n<p>從下面可以看出，1/1開始，流量往上衝，而1/4開始，交易所開始不穩，網站會時不時連不上，造成流量開始下滑，而到了1/5開始，交易所完全下線，而在當時，electra又只有「一個」交易所提供交易，結果就是coinsmarkets.com一停機，瞬間沒有任何地方可以交易electra，讓coinmarketcap.com抓不到資料，而出現一個垂直下滑到曲線。（到今天扣除coinsmarkets.com，electra已經在4個交易所上架）</p>\n<p><img src=\"https://s9.postimg.org/wwghll4wf/2018-02-25_21.53.50.png\" width=\"1280\" height=\"626\"/></p>\n<p>對比Binance.com(幣安)在2/8發生的「無法連線」事件，幣安的CEO直接第一時間在Twetter上面更新進度（很諷刺的是，他上一篇Tweeter是他被「富比世雜誌」專訪)</p>\n<p><img src=\"https://s9.postimg.org/gudyeqfcf/2018-02-25_21.11.32.png\" width=\"809\" height=\"800\"/></p>\n<p>讓我們紀錄一下他發Tweeter的數量：</p>\n<ul>\n  <li>2/8-----3則</li>\n  <li>2/9-----5則</li>\n  <li>2/10----3則，服務上線，外加一份事件報告</li>\n</ul>\n<p>結果，這次「幣安交易所」的無預警停機事件，在3天內結束，且幣安還提供手續費打折補償幣友們。事後，當然那些幣友們還是繼續在該交易所交易，而BNB幣（幣安幣）竟然事後也小漲了一波。</p>\n<p>話題回到coinsmarkets.com，在1/19的聲明發表之後，先是說hosting的問題，後來hosting搞定了，換說是DB的問題，直到2/24，無論是「交易」，「入幣」，「出幣」，都是沒辦法執行的。但是根據部分用戶指出，他們可以看到他們的錢包的數量是不動的，也就是說，在停機的這50天中，coinsmarkets.com似乎並沒有挪用用戶的資產。</p>\n<p>在2/24，electra幣的社群內，出現了這麼一篇聲明</p>\n<p><img src=\"https://s9.postimg.org/je9l8wfrz/2018-02-25_21.44.17.png\" width=\"954\" height=\"616\"/></p>\n<p>在這篇聲明的幾個小時之後，coinsmarkets.com也同步更新了狀態，說明會優先「允許electra的出幣」（該交易所的其他幣會陸續開放出幣）</p>\n<p>到了2/25，最新的聲明出來了</p>\n<p><img src=\"https://s9.postimg.org/94769u5dr/2018-02-25_21.47.50.png\" width=\"1280\" height=\"363\"/></p>\n<p>經過了50天，交易所才啟用了「部分」機能。而electra也經過了特別的價格波動，以此紀錄</p>\n<p><img src=\"https://s9.postimg.org/hnqk7nb67/2018-02-25_21.51.19.png\" width=\"1280\" height=\"631\"/></p>\n</html>",
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      "title": "「區塊鏈」的特點",
      "body": "<html>\n<h1>「區塊鏈」的魅力</h1>\n<p>相信來steemit的朋友，大部分都是「區塊鏈」的「幣友」。而區塊鏈的特點，我想就是在「帳本的不可修改性」及「帳本的透明性」。「帳本」如果可以隨意改動，會造成什麼現象呢？</p>\n<blockquote>會有信用的問題</blockquote>\n<p>這個說起來很抽象，用簡單的案例來講，好比以前玩的線上遊戲的「天堂」，那個時候有「天堂幣」。而天堂幣是遊戲公司開發出來，發行給玩家的。可是，正因為天堂幣的「數量」是遊戲公司的程式工程師所寫出來的，而因為遊戲公司的架構，他們的程式碼並不會是公開的。</p>\n<p>不公開的程式碼，就讓「公司的高層」有地方可以操作，也就是如同「央行」的「印鈔票」。而「不透明機制下的印鈔票」，一方面讓「天堂幣」貶值，一方面也讓「天堂幣」的信用打折扣。</p>\n<p>再更白話文的說，就說「每個人的天堂幣的由來會不一樣」。你的天堂幣可能是用新台幣換來的，他的天堂幣可能是打寶打了6天得到的，可是身為遊戲公司的高級工程師的我，我的天堂幣是「修改電子錢包的數字」，憑空跑出來的。</p>\n<blockquote>「帳本的不可修改性和透明性」帶來的是？</blockquote>\n<ul>\n  <li>沒有人可以「捏造」金額，所有的金額都會是「有由來」，且在「公開帳本」上面，是可以查到交易紀錄。</li>\n  <li>因為「不可修改」的特性，我們可以確保「追查的帳本是可信任的」，而不會有「有帳本可以追查，但是帳本已經被動過手腳了」</li>\n  <li>「帳本」是分佈在數個不同的電腦，伺服器上面，互相之間有鉤稽的機制，不用擔心有「A帳」及「B帳」的異同問題</li>\n</ul>\n<p>在「區塊鏈」這個技術大量被採用以前，當然也有其他的手法可以達到「不可修改性」和「透明性」。可是，都是半套的，且要是有額外附加條件的。現在，大量的「區塊鏈」程式碼公開的網路上，GitHub共享概念的普及，比特幣的操作，都是「區塊鏈」被更多人認識的推手。</p>\n</html>",
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      "author": "nick-coin",
      "permlink": "re-ian8ko-2018222t83410651z",
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      "body": "謝謝您的打賞，也預祝操作一切順利喔",
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      "body": "<html>\n<h1>在聊天機器人頻道內，輸入文字時的流程簡圖</h1>\n<h2>用戶Line App ---&gt; Line server ---&gt; Chatbot server ---&gt; Line server ---&gt; 用戶Line App</h2>\n<p>當我們在規劃聊天機器人時，要有一個概念：</p>\n<blockquote><strong>「用戶是不會直接和Chatbot連線的」</strong></blockquote>\n<p><strong>站在Line用戶的立場來看，Chatbot是「躲」在Line Server後方，一方面保障了Chatbot的安全（IP不會洩漏），一方面在防火牆上設定單純一些（只允許Line Server的訪問）。</strong></p>\n<p><strong>而</strong>Chatbot server，其實也就只是一個「網站」，Line server會把用戶輸入的資料（文字，圖片，網址等）以JSON的格式傳送過來，Chatbot server每被<strong>Line Server</strong>「丟」一個JSON過來，就會依程式的設定做出對應的行為，而「大部分」的行為，都是「丟」訊息回去給<strong>Line Server，再轉給Line用戶。</strong></p>\n<blockquote>Line server其實也就只是一個「中繼站」的角色。</blockquote>\n<p>真正的聊天機器人的設計，重心會是在Chatbot server的程式編寫上面。和Line有關的設定比重不大。</p>\n<p>下一篇文章，將會介紹Line帳號的設定及限制</p>\n</html>",
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      "body": "<html>\n<h2><img src=\"http://d.blog.xuite.net/d/8/c/7/20862222/blog_1577153/txt/363071076/0.jpg\" width=\"673\" height=\"373\"/></h2>\n<h2>握有加密貨幣的人，可能有以下幾個困擾的點：</h2>\n<ul>\n  <li>個別交易所的總資產要自行計算</li>\n  <li>要自行換算新台幣的幣值</li>\n  <li>現行的加密貨幣App多為英文介面，不夠體貼</li>\n</ul>\n<h2>我規劃中的chatbot，針對在<em>多個交易所</em>握有<em>多種加密貨幣</em>的使用者，解決以下的問題：</h2>\n<ul>\n  <li>即時提供新台幣單位的總資產金額</li>\n  <li>正體中文介面</li>\n  <li>以總資產為基底的「上升%」及「下降%」，設定警告通知</li>\n  <li>以單幣種為基底的「上升%」及「下降%」，設定警告通知</li>\n  <li>聊天機器人架在Line上面（台灣市佔率最高的聊天App），不需另外安裝App</li>\n</ul>\n<h3>下一篇文章會說明程式設計架構，及選用的工具</h3>\n</html>",
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      "body": "按綠色那個小箭頭",
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      "body": "<html>\n<p>單純以兩個元素：</p>\n<ol>\n  <li>有無台幣（NTD）對換機制</li>\n  <li>有無正體中文介面</li>\n</ol>\n<p>分析一下市面上幾個「追蹤及記錄」加密貨幣的App</p>\n<ul>\n  <li>CoinStats &nbsp;https://coin-stats.com/</li>\n</ul>\n<p>無台幣（NTD）對換機制，有簡中介面</p>\n<ul>\n  <li>MyToken &nbsp;http://mytoken.io/</li>\n</ul>\n<p>無台幣（NTD）對換機制，有簡中介面</p>\n<ul>\n  <li>blockfolio &nbsp;https://www.blockfolio.com/</li>\n</ul>\n<p>有台幣（NTD）對換機制，但無中文介面</p>\n<ul>\n  <li>Coin Ticker &nbsp;http://cointicker.info/</li>\n</ul>\n<p>有台幣（NTD）對換機制，無中文介面</p>\n<ul>\n  <li>Delta - Crypto &amp; ICO Portfolio &nbsp;https://getdelta.io/</li>\n</ul>\n<p>無台幣（NTD）對換機制，無中文介面</p>\n<p><code>發現一個有趣的情況，目前市面上沒有同時擁有「正體中文介面，又有台幣計價的加密貨幣App」！</code></p>\n</html>",
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