MetaForce佛薩奇系統開發原始碼(升級版)

caiayu1234發表於2023-04-11

 然後隨著Web2.0中大量使用者自由釋出的海量的資料,這些資料很多都是未經過驗證的,質量以及真實性都無法得到保證。所以使得網際網路環境下發布的資訊的純淨度與可信度大大降低;I88智慧合約I928系統開發8024


海量資料的到來同時還導致了搜尋引擎進行檢索之後得到的檢索結果的越來越不符合使用者的需求,檢索效果越來越差。伴隨著Web2.0中存在的這些問題,Web3.O的概念被提出

  

  pendingWithdrawals[richest]+=msg.value;

  

  richest=msg.sender;

  

  mostSent=msg.value;

  

  return true;

  

  }else{

  

  return false;

  

  }

  

  }

  

  //收款方呼叫這個函式,主動提取款項

  

  function withdraw()public{

  

  uint amount=pendingWithdrawals[msg.sender];

  

  pendingWithdrawals[msg.sender]=0;

  

  msg.sender.transfer(amount);

  

  }

  

  }

  

  //SPDX-License-Identifier:GPL-3.0

  

  pragma solidity 0.8.0;

  

  contract SimpleAuction{

  

  address payable public beneficiary;

  

  uint public auctionEnd;

  

  address public highestBidder;

  

  uint public highestBid;

  

  mapping(address=>uint)pendingReturns;

  

  bool ended;

  

  pragma solidity^0.5.0;

  

  contract Test{

  

  address public richest;

  

  uint public mostSent;

  

  mapping(address=>uint)pendingWithdrawals;

  

  constructor()public payable{

  

  richest=msg.sender;

  

  mostSent=msg.value;

  

  }

  

  function becomeRichest()public payable returns(bool){

  

  if(msg.value>mostSent){

  

  //此處不直接轉賬,暫時記錄應付款項

  

  //變更觸發的事件

  

  event HighestBidIncreased(address bidder,uint amount);

  

  event AuctionEnded(address winner,uint amount);

  

  constructor(uint _biddingTime,address payable _beneficiary){

  

  beneficiary=_beneficiary;

  

  auctionEnd=block.timestamp+_biddingTime;

  

  }


來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/69973864/viewspace-2944905/,如需轉載,請註明出處,否則將追究法律責任。

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