調試在映射中註冊

我有一份名為 Registry 的契約

pragma solidity ^0.4.11;

contract Registry {
   mapping(bytes32 => address) public ID;
   mapping(address => address) public Contract;

   function register(bytes32 _id) {
       ID[_id] = tx.origin;
       Contract[tx.origin] = msg.sender;
   }

   function getPublicAddress(bytes32 _id) constant returns (address) {
       return (ID[_id]);
   }

   function getContractAddress(bytes32 _id) constant returns (address) { 
       return Contract[ID[_id]];
   } 
}

另一個叫使用者

contract User { 
   address owner;
   address reg;
   Registry registry = Registry(reg);
   // Register in the system
   function register(bytes32 _id) {
       registry.register(_id);
   }
   function getContractAddress(bytes32 _id) {
       registry.getContractAddress(_id);
   }
   function getPublicAddress(bytes32 _id) {
       registry.getPublicAddress(_id);
   }
}

,和不起作用，我不明白為什麼registry()。getPublicAddress()``getContractAddress()

我嘗試使用 Truffle 進行測試，但遇到了一個目前尚未解決的已知錯誤。我在這裡問過，GitHub上的討論在這裡。

我嘗試在我的私有區塊鏈中執行它，我有以下程式碼

register: function(publicAddress, contractAddress, _id) {
   // Getting that user's instance of the contract
   const contract = contractInstance("User", contractAddress);
   // Interaction with the contract
   contract.register(web3.fromAscii(_id), {from: publicAddress}, (err, res) => {
       // Log transaction to explore
       if (err) {
           console.log(err);
       } else {
           console.log('tx: ' + res);
           helpers.addTransaction(publicAddress, res);
       }
   });
},
getContractAddress: function(contractAddress, _id) {
   const contract = contractInstance("User", contractAddress);
   contract.getContractAddress.call(web3.fromAscii(_id), (err, res) => {
       if (err) {
           console.log(err);
       } else {
           console.log(res);
       }
   })
},
getPublicAddress: function(contractAddress, _id) {
   const contract = contractInstance("User", contractAddress);
   contract.getPublicAddress.call(web3.fromAscii(_id), (err, res) => {
       if (err) {
           console.log(err);
       } else {
           console.log(res);
       }
   })
}

註冊（和探勘）後，我就回來了

[]

打電話時getPublicAddress()或getContractAddress()。

誰能看出問題出在哪裡？

你的合約有很多bug，如下：

• reg參數，沒有辦法設置它。reg 的預設值為零，因此呼叫方法時不會呼叫註冊合約getPublicAddress。
• getPublicAddress和 getContractAddress方法沒有返回值。

所以我修改了你的契約並在remix中測試一切正常，契約如下：

pragma solidity ^0.4.11;
contract Registry {

   mapping(bytes32 => address) public ID;
   mapping(address => address) public Contract;

   event log(bytes32,address);
   function register(bytes32 _id) {
       ID[_id] = tx.origin;
       Contract[tx.origin] = msg.sender;
   }

   function getPublicAddress(bytes32 _id) constant returns (address) {
       log(_id,ID[_id]);
       return (ID[_id]);
   }

   function getContractAddress(bytes32 _id) constant returns (address) { 
       log(_id,Contract[ID[_id]]);
       return Contract[ID[_id]];
   } 
}

contract User { 
   address owner;
   Registry registry;
   // Register in the system
   function register(bytes32 _id) {
       registry.register(_id);
   }
   function getContractAddress(bytes32 _id) constant returns (address){
       return registry.getContractAddress(_id);
   }
   function getPublicAddress(bytes32 _id) constant returns (address) {
       return registry.getPublicAddress(_id);
   }
   function setRegister(address _addr){
       registry = Registry(_addr);
   }
}

首先，你應該部署註冊合約，然後部署使用者合約，現在複製註冊合約地址來呼叫setRegister方法，探勘和測試。結果是

希望有幫助~

引用自：https://ethereum.stackexchange.com/questions/24943