從 geth 命令行與已部署的智能合約互動
我有一份契約,我希望能夠將任何其他地址送出的數字相加:
contract UnitCounter { mapping (address => uint256) public UnitsFrom; uint256 public TotalUnits; function submitUnits(uint256 Units) { UnitsFrom[msg.sender] = Units; TotalUnits += Units; } }
以此為粗略指導,我在私人網路上按照以下步驟操作:
- 使用霧部署合約
- 使用霧中的“顯示介面”圖示獲取 JSON 介面程式碼
0x17d541b8aACFFe473e3dD32eBA83C82B51DB8EF9
在我的私有區塊鏈上複製已部署合約的地址。- 在 Geth 控制台上:
var abi=[ { "constant": false, "inputs": [ { "name": "Units", "type": "uint256" } ], "name": "submitUnits", "outputs": [], "type": "function" }, { "constant": true, "inputs": [], "name": "TotalUnits", "outputs": [ { "name": "", "type": "uint256" } ], "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "address" } ], "name": "UnitsFrom", "outputs": [ { "name": "", "type": "uint256", "value": "0" } ], "type": "function" } ]
var MyContract = web3.eth.contract(abi); var MyContractInstance = MyContract.at('0x17d541b8aACFFe473e3dD32eBA83C82B51DB8EF9'); MyContractInstance.submitUnits('10');
然後我收到以下錯誤:
錯誤:
web3.js:3887:15
at web3.js:3713:20
at web3.js:4939:28
at web3.js:4938:12 at web3.js
:4938:12at web3.js:3713:20 at web3.js:4964:18
at web3 .js:4989:23
at web3.js:4055:16
at apply ()
at web3.js:4141:16
這些錯誤是什麼意思?
我應該如何從這一點調試?
您需要添加一個交易對象來告訴 geth 使用哪個帳戶進行交易:
MyContractInstance.submitUnits('10', {from: eth.accounts[0], gas:3000000});
您也可以通過設置預設帳戶的方式消除此錯誤,因此您不必在與契約互動時添加選項 {from:…}。
在您的geth 控制台中:-
// default account set to first account in your geth accounts eth.defaultAccount = eth.accounts[0] // Note: If eth.accounts is empty, you can create a new account with personal.newAccount()
// default account set to coinbase(Etherbase), the default primary local account in geth eth.defaultAccount = eth.coinbase
如果您隨後收到此錯誤 -錯誤:需要身份驗證:密碼或解鎖,請解鎖您的帳戶。
在您的geth 控制台中:-
// unlocks your account for calls/transactions after you give password personal.unlockAccount(eth.defaultAccount)