我正在使用ETH区块链技术制作一个简单的区块链。
我正在制作一个简单的todolist，遵循本教程。
我的todolist工作得很好，我可以看到那里的任务，然而，当我试图添加一个新任务时，我得到以下错误:
Uncaught (in promise) Error: invalid address
v http://localhost:3000/js/web3.min.js:2
l http://localhost:3000/js/web3.min.js:2
formatInput http://localhost:3000/js/web3.min.js:2
formatInput http://localhost:3000/js/web3.min.js:2
toPayload http://localhost:3000/js/web3.min.js:2
e http://localhost:3000/js/web3.min.js:2
sendTransaction http://localhost:3000/js/web3.min.js:2
execute http://localhost:3000/js/web3.min.js:2
synchronizeFunction http://localhost:3000/vendor/truffle-contract/dist/truffle-contract.js:206
synchronizeFunction http://localhost:3000/vendor/truffle-contract/dist/truffle-contract.js:157
promise callback*synchronizeFunction/< http://localhost:3000/vendor/truffle-contract/dist/truffle-contract.js:156
createTask http://localhost:3000/js/app.js:124
onsubmit http://localhost:3000/:1
web3.min.js:2:4288
createTask http://localhost:3000/js/app.js:125
AsyncFunctionThrow self-hosted:696
(Async: async)
onsubmit http://localhost:3000/:1
这是app.js
App = {
loading: false,
contracts: {},
load: async () => {
await App.loadWeb3();
await App.loadAccount();
await App.loadContract();
await App.render();
},
// https://medium.com/metamask/https-medium-com-metamask-breaking-change-injecting-web3-7722797916a8
loadWeb3: async () => {
if (typeof web3 !== "undefined") {
App.web3Provider = web3.currentProvider;
web3 = new Web3(web3.currentProvider);
} else {
window.alert("Please connect to Metamask.");
}
// Modern dapp browsers...
if (window.ethereum) {
window.web3 = new Web3(ethereum);
try {
// Request account access if needed
await ethereum.enable();
// Acccounts now exposed
web3.eth.sendTransaction({
/* ... */
});
} catch (error) {
// User denied account access...
}
}
// Legacy dapp browsers...
else if (window.web3) {
App.web3Provider = web3.currentProvider;
window.web3 = new Web3(web3.currentProvider);
// Acccounts always exposed
web3.eth.sendTransaction({
/* ... */
});
}
// Non-dapp browsers...
else {
console.log(
"Non-Ethereum browser detected. You should consider trying MetaMask!"
);
}
},
loadAccount: async () => {
// Set the current blockchain account
App.account = web3.eth.accounts[0];
console.log(App.account);
},
loadContract: async () => {
// Create a JavaScript version of the smart contract
const todoList = await $.getJSON("TodoList.json");
App.contracts.TodoList = TruffleContract(todoList);
App.contracts.TodoList.setProvider(App.web3Provider);
// Hydrate the smart contract with values from the blockchain
App.todoList = await App.contracts.TodoList.deployed();
// console.log(todoList);
},
render: async () => {
// Prevent double render
if (App.loading) {
return;
}
// Update app loading state
App.setLoading(true);
// Render Account
$("#account").html(App.account);
// Render Tasks
await App.renderTasks();
// Update loading state
App.setLoading(false);
},
renderTasks: async () => {
// Load the total task count from the blockchain
const taskCount = await App.todoList.taskCount();
const $taskTemplate = $(".taskTemplate");
// Render out each task with a new task template
for (var i = 1; i <= taskCount; i++) {
// Fetch the task data from the blockchain
const task = await App.todoList.tasks(i);
const taskId = task[0].toNumber();
const taskContent = task[1];
const taskCompleted = task[2];
// Create the html for the task
const $newTaskTemplate = $taskTemplate.clone();
$newTaskTemplate.find(".content").html(taskContent);
$newTaskTemplate
.find("input")
.prop("name", taskId)
.prop("checked", taskCompleted)
.on("click", App.toggleCompleted);
// Put the task in the correct list
if (taskCompleted) {
$("#completedTaskList").append($newTaskTemplate);
} else {
$("#taskList").append($newTaskTemplate);
}
// Show the task
$newTaskTemplate.show();
}
},
createTask: async () => {
App.setLoading(true);
const content = $("#newTask").val();
await App.todoList.createTask(content);
window.location.reload();
},
toggleCompleted: async (e) => {
App.setLoading(true);
const taskId = e.target.name;
await App.todoList.toggleCompleted(taskId);
window.location.reload();
},
setLoading: (boolean) => {
App.loading = boolean;
const loader = $("#loader");
const content = $("#content");
if (boolean) {
loader.show();
content.hide();
} else {
loader.hide();
content.show();
}
},
};
$(() => {
$(window).load(() => {
App.load();
});
});
在控制台中，它显示我的地址是:0xc5cfa0a0345f74e26cecfd8ec3a5cfa3843955ac
我正在使用元掩码和genache，我试图将我的智能联系人连接到我的元掩码钱包，所以我知道我已经连接，但我不确定为什么我得到这个错误。
我应该删除我的元掩码并重新做吗?我试着在这里寻找这个解决方案，但解决方案大多是旧的，不让我需要做的事情有意义。
如果你能帮助我，我将非常感激。
修复它，在app.js中你必须替换这一行:
App.account = web3.eth.accounts[0];
与以下行:
web3.eth.defaultAccount=web3.eth.accounts[0]