MetaForce馬蹄鏈佛薩奇模式軟體開發案例

lxqy1668發表於2023-04-12

 區塊鏈中每個節點的最終狀態必須保持一致,因此要求所有節點都能以等價的執行順序正確地並行執行同一批智慧合約交易.生成等價的執行順序的關鍵在於對沖突的交易擁有相同的序列化執行順序,這確保了各個節點並行執行智慧合約交易時能夠將其中衝突的交易按某種相同的順序序列執行.如果驗證節點只是簡單地重新並行執行新區塊中的智慧合約交易,則可能會產生不同的序列化執行順序和不同的區塊鏈最終狀態,從而導致新區塊驗證失敗.因此,所有節點都應該確保其並行執行的序列化順序是等價的,I88智慧合約I928系統開發8024

  

  {

  

  }

  

  }

  

  function setStartingBlock(uint256 _startingBlock)

  

  public

  

  onlyOwner

  

  {

  

  startingBlock=_startingBlock;

  

  }

  

  function lockDevMint()

  

  public

  

  onlyOwner

  

  {

  

  devMintLocked=true;

  

  }

  

  }

  

  "description":"YOUR DESCRIPTION",

  

  "external_url":"YOUR URL",

  

  "image":"IMAGE URL",

  

  "name":"TITLE",

  

  "attributes":[

  

  {

  

  "trait_type":"Base",

  

  "value":"Starfish"

  

  },

  

  {

  

  "trait_type":"Eyes",

  

  "value":"Big"

  

  },

  

  {

  

  "trait_type":"Mouth",

  

  "value":"Surprised"

  

  },

  

  //Minting

  

  function reup(uint256 quantity)

  

  external

  

  payable

  

  {

  

  require(

  

  block.number>=startingBlock,

  

  "Sale hasn't started yet!"

  

  );

  

  require(

  

  quantity<=maxMintsPerTx,

  

  "There is a limit on minting too many at a time."

  

  );

  

  require(

  

  nextTokenId-1+quantity<=maxTokens,

  

  "Minting this many would exceed supply."

  

  );

  

  require(

  

  msg.value>=tokenPrice*quantity,

  

  "Not enough ether sent."

  

  );

  

  require(

  

  msg.sender==tx.origin,

  

  "No contracts."

  

  );

  

  for(uint256 i=0;i<quantity;i++){

  

  _safeMint(msg.sender,nextTokenId++);

  

  }

  

  }


來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/70020038/viewspace-2945283/,如需轉載,請註明出處,否則將追究法律責任。

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