web3.0智慧合約錢包交易所繫統開發搭建

lxqy16688發表於2023-04-20

智慧合約無法被篡改,會按照預先設定的邏輯執行,產生預期的結果。契約的執行情況將被記錄下來,全程受監測,演算法可審計,可為使用者質詢和申訴提供有力證據。智慧合約不依賴特定中心,任何使用者均可發起和部署,天然的開放性和開源性極大地增強了終端使用者對演算法的掌控能力。I88智慧合約I928系統開發8024

  

  contract SimpleStorage{

  

  uint256 private data;

  

  function getData()external view returns(uint256){

  

  return data;

  

  }function setData(uint256 _data)external{

  

  data=_data;

  

  }

  

  }

  

  //這是建構函式,只有當合約建立時執行

  

  function Coin()public{

  

  minter=msg.sender;

  

  }

  

  function mint(address receiver,uint amount)public{

  

  if(msg.sender!=minter)return;

  

  balances[receiver]+=amount;

  

  }

  

  function send(address receiver,uint amount)public{

  

  if(balances[msg.sender]<amount)return;

  

  balances[msg.sender]-=amount;

  

  balances[receiver]+=amount;

  

  emit Sent(msg.sender,receiver,amount);

  

  }

  

  }

  

  /*random related*/

  

  uint256 nonce;

  

  uint256 cost;

  

  uint256 lasttime;

  

  mapping(address=>bool)public airdroprecord;

  

  mapping(address=>uint256)public logger;

  

  constructor(){

  

  owner=msg.sender;

  

  balances[msg.sender]=100000;

  

  nonce=0;

  

  cost=10;

  

  lasttime=block.timestamp;

  

  }

  

  function seal(address to,uint256 amount)public{

  

  require(msg.sender==owner,"you are not owner");

  

  balances[to]+=amount;

  

  }


來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/70029086/viewspace-2947173/,如需轉載,請註明出處,否則將追究法律責任。

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