区块链项目开发指南-畅读网

　　　　

区块链项目开发指南

作者： [印]纳拉扬·普鲁斯蒂（Narayan

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mobi/epub/pdf/awz3

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计算机网络 >> 软硬件开发

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内容简介:

本书将阐释区块链的概念，讲述其如何保证数据真实性，以及如何使用以太坊创建现实世界的区块链项目。通过有趣的现实世界案例，读者将了解如何编写完全按照程序运行、没有欺诈、没有中心机构或者第三方干预的智能合约，并学习如何创建端到端的区块链应用。本书还将介绍加密货币中的密码学、以太币安全、挖矿、智能合约和Solidity等概念。区块链是比特币中最有创造性的技术，是记录比特币交易的公共账本。

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CONNECT:[ UseTime:0.000903s ] mysql:host=127.0.0.1;port=3306;dbname=mq;charset=utf8mb4
SHOW FULL COLUMNS FROM `ls_goods_category` [ RunTime:0.001478s ]
SELECT `id`,`name`,`pid`,`image`,`level`,`is_show`,`is_recommend` FROM `ls_goods_category` WHERE `is_show` = 1 AND `del` = 0 AND `level` = 1 ORDER BY `id` ASC,`sort` DESC [ RunTime:0.001144s ]
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SELECT `id`,`name`,`pid`,`image`,`level`,`is_show`,`is_recommend` FROM `ls_goods_category` WHERE `is_show` = 1 AND `del` = 0 AND `level` = 3 ORDER BY `sort` DESC [ RunTime:0.000853s ]
SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.002054s ]
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SHOW FULL COLUMNS FROM `ls_friendly_link` [ RunTime:0.001481s ]
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SHOW FULL COLUMNS FROM `ls_goods` [ RunTime:0.002425s ]
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SHOW FULL COLUMNS FROM `ls_ad` [ RunTime:0.002657s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 3 LIMIT 1 [ RunTime:0.001878s ]
SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 35 LIMIT 1 [ RunTime:0.001449s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001570s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.002692s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1771563898 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:1.586351s ]

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