ethereum.enable() - 请求用户授权

ethereum.enable()方法请求用户授权应用访问MetaMask中的用户账号信息。 该方法返回一个Promise对象，其解析值为以太坊地址数组。

示例代码

下面的ES2015代码使用async/await方式来调用ethereum.enable()方法， 请求用户授权web应用访问其账号信息：

try {
  const accounts = await ethereum.enable()
  // You now have an array of accounts!
  // Currently only ever one:
  // ['0xFDEa65C8e26263F6d9A1B5de9555D2931A33b825']

} catch (error) {
  // Handle error. Likely the user rejected the login:
  console.log(reason === "User rejected provider access")
}

下面的是ES5代码，实现同样的功能：

ethereum.enable()
.then(function (accounts) {
  // You now have an array of accounts!
  // Currently only ever one:
  // ['0xFDEa65C8e26263F6d9A1B5de9555D2931A33b825']
})
.catch(function (reason) {
  // Handle error. Likely the user rejected the login:
  console.log(reason === "User rejected provider access")
})