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区块链泰山互助公排商城dapp系统开发部署介绍

区块部署系统开发 介绍 商城 DApp 互助
2023-06-13 09:15:26 时间

商城结合区块链去中心化、可信任、不可篡改的特性，解决传统电商模式的诸多困扰，在支付、激励、交易、营销等方面，极大地提升了电商模式的商业价值。

区块链技术去中心化的理念，现在许多公司都将其作为基底打造管理系统、商城系统。

区块链商城先是通过各自工具属性社交属性价值内容的核心功能过滤到海量的目标用户后，继而添加了支付、精选商品、等商业功能。让用户在使用时得到了更好地生活体验，进而也会吸引新的用户加入其中。

区块链商城的突破性

（1）区块链商城交易安全性是比较高的，很难破解。

（2）交易信息是公开透明，保证了交易信息的不可篡改性，防止信息丢失或被盗。

（3）区块链商城中的信息是点对点连接的分布式存储，让企业之间的交易信息更加的稳定、持续和可靠。

 OwnedUpgradeabilityProxy.sol

pragma solidity ^0.4.24;

import './UpgradeabilityProxy.sol';


/**
 * @title OwnedUpgradeabilityProxy
 * @dev This contract combines an upgradeability proxy with basic authorization control functionalities
 */
contract OwnedUpgradeabilityProxy is UpgradeabilityProxy {
  /**
  * @dev Event to show ownership has been transferred
  * @param previousOwner representing the address of the previous owner
  * @param newOwner representing the address of the new owner
  */
  event ProxyOwnershipTransferred(address previousOwner, address newOwner);

  // Storage position of the owner of the contract
  bytes32 private constant proxyOwnerPosition = keccak256("org.zeppelinos.proxy.owner");

  /**
  * @dev the constructor sets the original owner of the contract to the sender account.
  */
  constructor() public {
    setUpgradeabilityOwner(msg.sender);
  }

  /**
  * @dev Throws if called by any account other than the owner.
  */
  modifier onlyProxyOwner() {
    require(msg.sender == proxyOwner());
    _;
  }

  /**
   * @dev Tells the address of the owner
   * @return the address of the owner
   */
  function proxyOwner() public view returns (address owner) {
    bytes32 position = proxyOwnerPosition;
    assembly {
      owner := sload(position)
    }
  }

  /**
   * @dev Sets the address of the owner
   */
  function setUpgradeabilityOwner(address newProxyOwner) internal {
    bytes32 position = proxyOwnerPosition;
    assembly {
      sstore(position, newProxyOwner)
    }
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferProxyOwnership(address newOwner) public onlyProxyOwner {
    require(newOwner != address(0));
    emit ProxyOwnershipTransferred(proxyOwner(), newOwner);
    setUpgradeabilityOwner(newOwner);
  }

  /**
   * @dev Allows the proxy owner to upgrade the current version of the proxy.
   * @param implementation representing the address of the new implementation to be set.
   */
  function upgradeTo(address implementation) public onlyProxyOwner {
    _upgradeTo(implementation);
  }

  /**
   * @dev Allows the proxy owner to upgrade the current version of the proxy and call the new implementation
   * to initialize whatever is needed through a low level call.
   * @param implementation representing the address of the new implementation to be set.
   * @param data represents the msg.data to bet sent in the low level call. This parameter may include the function
   * signature of the implementation to be called with the needed payload
   */
  function upgradeToAndCall(address implementation, bytes data) payable public onlyProxyOwner {
    upgradeTo(implementation);
    require(implementation.delegatecall(data));
}
}

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