ethereum.sendAsync() - 异步发送交易

ethereum.sendAsync()方法采用异步形式向web3浏览器发送消息。 消息格式与以太坊JSON-RPC API的格式向对应，RPC API的响应结果在回调函数 中获得。

示例代码

下面的示例展示了如何使用ethereum.send()方法来发送以太币、调用智能合约：

params: [{
  "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
  "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
  "gas": "0x76c0", // 30400
  "gasPrice": "0x9184e72a000", // 10000000000000
  "value": "0x9184e72a", // 2441406250
  "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"
}]

ethereum.sendAsync({
  method: 'eth_sendTransaction',
  params: params,
  from: accounts[0], // Provide the user's account to use.
}, function (err, result) {
  // A typical node-style, error-first callback.
  // The result varies by method, per the JSON RPC API.
  // For example, this method will return a transaction hash on success.
})