使用包含數組的事件重載和事件日誌是否存在問題？

我的事件觸發了，但從未記錄最後一個參數。它似乎甚至不存在。這是我的可靠程式碼：

pragma solidity >=0.5.6;

contract EventTest {
 event marketCreated(address[] virtualShareAddresses, address market, uint256 indexed endTime, string description, string extraInfo);//categorical
 event marketCreated(address[2] virtualShareAddresses, address market, uint256 indexed endTime, string description, string extraInfo);//binary
 event marketCreated(address[2] virtualShareAddresses, address market, uint256 indexed endTime, string description, string extraInfo, int256 _minPrice, int256 _maxPrice, uint256 _numTicks);//scalar


 function createYesNoMarket(
   uint256 _endTime,
   string memory _description,
   string memory _extraInfo
   ) public payable returns (bool) 

 {
   address[2] memory virtualShareAddresses;
   address newMarket = address(0);
   virtualShareAddresses[0] = address(1);
   virtualShareAddresses[1] = address(2);
   emit marketCreated(virtualShareAddresses, address(newMarket), _endTime, _description, _extraInfo);
   return true;
 }
}

這是我使用 web3.js 呼叫事件的方式：

contract.methods.createYesNoMarket(1575158400, "Will it rain on Friday in Sacramento California?", "foo").send({from: '0x5680CA2e3b4F8bC043aCeB31837c89DbA8bFBa75', gas: 6000000}, (error, hash) => {
 console.log(hash)
 console.log(error)
})

這是我的 event.returnValues 記錄到控制台：

{ '0': 
  [ '0x0000000000000000000000000000000000000001',
    '0x0000000000000000000000000000000000000002' ],
 '1': '0x0000000000000000000000000000000000000000',
 '2': BigNumber { _hex: '0x5de30280' },
 '3': 'Will it rain on Friday in Sacramento California?',
 endTime: BigNumber { _hex: '0x5de30280' },
 virtualShareAddresses: 
  [ '0x0000000000000000000000000000000000000001',
    '0x0000000000000000000000000000000000000002' ],
 market: '0x0000000000000000000000000000000000000000',
 description: 'Will it rain on Friday in Sacramento California?' }

如您所見，從不記錄 extraInfo 欄位。有誰知道這是為什麼？

您正在事件日誌中使用事件日誌重載和數組。

通過表面測試，我發現如果您放棄其中任何一個功能，它就會按預期工作。

如果您註釋掉此測試中實際未使用的日誌，那麼情況會有所改善。

pragma solidity >=0.5.6;

contract EventTest {
 //event marketCreated(address[] virtualShareAddresses, address market, uint256 indexed endTime, string description, string extraInfo);//categorical
 event marketCreated(address[2] virtualShareAddresses, address market, uint256 indexed endTime, string description, string extraInfo);//binary
 //event marketCreated(address market, uint256 indexed endTime, string description, string extraInfo, int256 _minPrice, int256 _maxPrice, uint256 _numTicks);//scalar


 function createYesNoMarket(
   uint256 _endTime,
   string memory _description,
   string memory _extraInfo
   ) public payable returns (bool) 

 {
   address[2] memory virtualShareAddresses;
   address newMarket = address(0);
   virtualShareAddresses[0] = address(1);
   virtualShareAddresses[1] = address(2);
   emit marketCreated(virtualShareAddresses, address(newMarket), _endTime, _description, _extraInfo);
   return true;
 }
}

在 Remix 中，日誌完全符合預期：

[
   {
       "from": "0xba8dc1a692093d8abd34e12aa05a4fe691121bb6",
       "topic": "0x723cfaf3d6cd591c1439c0b9b08b74eaa46598df92bd434a707f33f48fa8bbd8",
       "event": "marketCreated",
       "args": {
           "0": [
               "0x0000000000000000000000000000000000000001",
               "0x0000000000000000000000000000000000000002"
           ],
           "1": "0x0000000000000000000000000000000000000000",
           "2": "1575158400",
           "3": "Will it rain on Friday in Sacramento California?",
           "4": "foo",
           "virtualShareAddresses": [
               "0x0000000000000000000000000000000000000001",
               "0x0000000000000000000000000000000000000002"
           ],
           "market": "0x0000000000000000000000000000000000000000",
           "endTime": "1575158400",
           "description": "Will it rain on Friday in Sacramento California?",
           "extraInfo": "foo",
           "length": 5
       }
   }
]

使用事件重載，似乎很難解釋日誌：

[
   {
       "from": "0x9876e235a87f520c827317a8987c9e1fde804485",
       "data": "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",
       "topics": [
           "0x723cfaf3d6cd591c1439c0b9b08b74eaa46598df92bd434a707f33f48fa8bbd8",
           "0x000000000000000000000000000000000000000000000000000000005de30280"
       ]
   }
]

事件重載應該可以工作。如果刪除了數組元素，則可以顯示它可以工作：

contract EventTest {
 // event marketCreated(address market, uint256 indexed endTime, string description, string extraInfo);//categorical
 event marketCreated(address market, uint256 indexed endTime, string description, string extraInfo);//binary
 event marketCreated(address market, uint256 indexed endTime, string description, string extraInfo, int256 _minPrice, int256 _maxPrice, uint256 _numTicks);//scalar


 function createYesNoMarket( ...

   emit marketCreated(address(newMarket), _endTime, _description, _extraInfo);

這也可以按預期工作：

   [
   {
       "from": "0xde6a66562c299052b1cfd24abc1dc639d429e1d6",
       "topic": "0x0d1dda2dfb9ffa94623e4da9d1b79c3d2f94286cf597898c7cb8551e2971b988",
       "event": "marketCreated",
       "args": {
           "0": "0x0000000000000000000000000000000000000000",
           "1": "1575158400",
           "2": "Will it rain on Friday in Sacramento California?",
           "3": "foo",
           "market": "0x0000000000000000000000000000000000000000",
           "endTime": "1575158400",
           "description": "Will it rain on Friday in Sacramento California?",
           "extraInfo": "foo",
           "length": 4
       }
   }
]

因此，即使數組沒問題，即使事件重載也沒問題，但將這些功能一起使用似乎確實存在問題。這可能是問題報告的候選者，或者可能有人會提出這些功能相互排斥的已知原因。

希望能幫助到你。

引用自：https://ethereum.stackexchange.com/questions/70394