PROSAGA码农传奇-以太坊-为已部署的智能合约创建全局通讯簿

<div class =“post-text”itemprop =“text”>
  <P>
    首先，如果你想使用
     <code>
      AddressBook
    </code>
     作为跟踪和加载所有的全球智能合约
     <code>
      Deal
    </code>
     合同。你应该已经部署了
     <code>
      AddressBook
    </code>
     合同并保存它的地址。然后你可以加载
     <code>
      AddressBook
    </code>
     合同里面
     <code>
      constructor
    </code>
     的
     <code>
      Deal
    </code>
     合同并添加当前的地址
     <code>
      Deal
    </code>
     将在已部署的全球范围内部署的合同
     <code>
      AddressBook
    </code>
     合同。我做了一些关于给定合同的工作。我在里面使用了一组地址
     <code>
      AddressBook
    </code>
     合同跟踪所有的地址
     <code>
      Deal
    </code>
     合同。以下示例代码可以为您提供好主意。
  </p>
   <pre>
    <code>
      //Address Book Contract
    pragma solidity ^0.5.1;

contract AddressBook {
    //mapping(address => address[]) private _addresses;
    address[] private _addresses;
    mapping(address => mapping(address => string)) private _aliases;

function getAddresses() public view  returns (address [] memory) {
        return _addresses;
    }
    function addAddress(address addr, string memory _alias) public payable {
        _addresses.push(addr);
        _aliases[msg.sender][addr] = _alias;
    }
}

</code>
  </pre>
  <P>
    我只关注
     <code>
      _address
    </code>
     这里。以下是交易合同：
  </p>
   <pre>
    <code>
      pragma solidity ^0.5.1;
import "./AddressBook.sol";

contract Deal {
      AddressBook addressBook;
      address public owner;
      address public buyerAddr;  
      address private addr;
      string private metaData;
      uint private duration;
      uint private price;
      string private typeOfData;
      string private gateKeeper;

event SafepaySent(address buyer, uint value, uint now);

/// The smart contract's constructor
     constructor(address _addressBook) public payable {

/// The seller is the contract's owner
        owner = msg.sender;
        addressBook  = AddressBook(_addressBook);
        addressBook.addAddress(address(this),"test");
      }
      function getAddresses() public view returns (address[] memory) {
        return  addressBook.getAddresses();
        }
    }

</code>
  </pre>
  <P>
    您还可以在混音中测试并运行它。希望它有效。
  </p>
</DIV>