NFT鑄造盲盒挖礦系統開發|NFT模式開發

lxqy16688發表於2023-05-11

NFT鑄造盲盒挖礦系統開發,{I88公鏈-I928合約-開發8024},隨著區塊鏈技術在各領域的廣泛應用,其未來發展趨勢也備受關注。一方面,區塊鏈技術在不斷創新和完善,另一方面,區塊鏈技術也將與其他技術融合,為各行各業的數字化轉型提供更多的可能性。

  

  event Approval(

  

  address indexed _owner,

  

  address indexed _spender,

  

  uint _value

  

  );

  

  mapping(address=>uint256)public balanceOf;

  

  mapping(address=>mapping(address=>uint265))public allowance;

  

  constructor()public{

  

  balanceOf[msg.sender]=totalSupply;

  

  }

  

  function transfer(address _to,uint256 _value)public returns(bool success){

  

  require(balanceOf[msg.sender]>=_value);

  

  balanceOf[msg.sender]-=_value;

  

  balanceOf[_to]+=_value;

  

  emit Transfer(msg.sender,_to,_value);

  

  return true;

  

  }

  

  constructor(address _owner){

  

  //The totalSupply is assigned to transaction sender,which is the account

  

  //that is deploying the contract.

  

  balances[_owner]=totalSupply;

  

  owner=_owner;

  

  }

  

  /**

  

  *A function to transfer tokens.

  

  *

  

  *The`external`modifier makes a function*only*callable from outside

  

  *the contract.

  

  */

  

  function transfer(address to,uint256 amount)external{

  

  //Check if the transaction sender has enough tokens.

  

  //If`require`'s first argument evaluates to`false`then the

  

  //transaction will revert.

  

  require(balances[msg.sender]>=amount,"Not enough tokens");


來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/70029086/viewspace-2951371/,如需轉載,請註明出處,否則將追究法律責任。

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