將數組從松露傳遞給solidity的函式

October 30, 2019

從松露ALERT: Transaction Error. Exception thrown in contract code呼叫函式時，我進入了元遮罩。addBet當從 remix 呼叫該函式時，該函式可以正常工作。如果我更改程式碼並傳遞單個值而不是數組，該函式也適用於松露。真的可以將數組從松露傳遞給solidity函式嗎？

在瀏覽器控制台中，我看到了這個

MetaMask - RPC Error: Error: [ethjs-rpc] rpc error with payload {"id":779020742217,"jsonrpc":"2.0","params":["0xf901ad0c8504a817c800836170d4949d70edd4e3647f2ec9a3b5abce637854b650fe1b80b901440c7bf290000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c0ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff9cffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffce000000000000000000000000000000000000000000000000000000000000001047656f72676961207673204d69616d6900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000747656f726769610000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000054d69616d69000000000000000000000000000000000000000000000000000000822d46a0c2291f4adb451dae0cdfc07076a0af766c061bf9c7ffa56750bb36c7057d10f5a03920df81d72cd6a838664ff8d01eaebb6e51ae07a83b477d74ed03e51905d5cb"],"method":"eth_sendRawTransaction"} [object Object] 
uncaught exception: Object

投注.sol

pragma solidity ^0.5.0;
pragma experimental ABIEncoderV2;

contract Betting {

   struct Bet{
       uint betId;
       string question;
       BetStatus betStatus;
       mapping(uint =&gt; MoneyLineDatum) moneyLineData;
       uint lengthMoneyLineData;
   }

   struct MoneyLineDatum{
       string option;
       int value; 
   }

   address public owner = msg.sender;

   mapping(uint =&gt; Bet) public bets;
   uint public lengthBets;
   enum BetStatus {Open, Closed}

   constructor() public{
       string[2] memory options = ["Gator", "Miami"];
       int[2] memory values = [int(200), -100];
       addBet("Gator vs Miami", options, values);

       options = ["Gator", "Georgia"];
       values = [int(200), -150];
       addBet("Gator vs Georgia", options, values);
   }

   modifier onlyBy(address account){
       require(msg.sender == account, "Unauthorised Access");
       _;
   }

   function addNewEmptyBet() public{
       Bet memory bet;
       bets[lengthBets] = bet;
   }

   function addBet(string memory question, string[2] memory options, int[2] memory values) public onlyBy(owner){
       addNewEmptyBet();
       Bet storage bet = bets[lengthBets];
       bet.betId = lengthBets;
       bet.question = question;
       bet.betStatus = BetStatus.Open;
       lengthBets+=1;
       for(uint i=0; i&lt;options.length; i++){
           bet.moneyLineData[i] = MoneyLineDatum(options[i], values[i]);
       }
       bet.lengthMoneyLineData+=options.length;
   }

   function getLengthMoneyLineData(uint betId) public view returns(uint){
       return bets[betId].lengthMoneyLineData;
   }

   function getMoneyLineData(uint betId, uint idx) public view returns(string memory, int){
       MoneyLineDatum storage moneyLineDatum = bets[betId].moneyLineData[idx];
       return (moneyLineDatum.option, moneyLineDatum.value);
   }
}

來自 app.js 的片段

App.contracts.Betting.deployed().then(function(_instance){
   return _instance.addBet(question, options, values, {from: App.account});
}).then(function(){
   console.log("Bet has been added");          
});

options並且values是每個大小為 2 的數組，分別具有數據類型string[]和int[]

任何幫助將不勝感激！謝謝！

解決方案：
擺脫pragma experimental ABIEncoderV2;
將每次出現的替換string為bytes32
將每次出現的替換bytes32 memory為bytes32
將每次出現的替換"Gator"為bytes32("Gator")
將每次出現的替換"Miami"為bytes32("Miami")
將每次出現的替換"Georgia"為bytes32("Georgia")
將每次出現的替換"Gator vs Miami"為bytes32("Gator vs Miami")
將每次出現的替換"Gator vs Georgia"為bytes32("Gator vs Georgia")
在您的 Truffle 測試中，將每個字元串轉換x為：
web3.fromAscii(x)如果您使用的是 Truffle v4.x（依賴於 Web3 v0.x）或更早版本
web3.utils.asciiToHex(x)如果您使用的是 Truffle v5.x（依賴於 Web3 v1.x）或更高版本
關於合約程式碼的幾點說明：
似乎您的每個映射都像數組一樣使用；所以你可能應該使用數組來代替（為了良好的實踐，以及氣體成本效率）
onlyBy修飾符不需要作為account輸入參數；相反，它可以msg.sender直接將的值與的值進行比較owner