使用异步/等待或在打字稿中，但没有获得任何结果

Question

在这里我打电话给Axios呼叫，而Promise无法解决。 我在这里使用Typescript，typeScript的版本为4

getBalance = async (address: string) => {
        let endpoints = this.getBalanceEndpoint();
        for (let i = 0; i < endpoints.length; i++) {
          let endpoint = endpoints[i];
          const url = endpoint + address + '?details=basic';
          const param: object = {
            method: 'get',
            url: url,
            headers: {
              'User-Agent': UA,
            },
            timeout: 1000,
          };
          try {
            console.log(param,"Balance Params")
            **const response = await axios(param)**;
            console.log(response,"BITCOIN BALANCE")
            }
          } catch (e) {
            console.log(e)
          }
          await new Promise(resolve =>
            setTimeout(resolve, GENERIC_REQUEST_THROTTLE_DELAY)
          );
        }
        throw new Error('Unable to retrieve balance!');
      };

我没有得到任何结果或承诺在等待Axios中没有解决。

请让我知道答案

Answer 1

我认为您需要从异步函数返回响应并进行一些代码更改：

getBalance = async (address: string) => {
      let endpoints = this.getBalanceEndpoint();
      const result = []; // <-- create an RESULT variable
      for (let i = 0; i < endpoints.length; i++) {
        let endpoint = endpoints[i];
        const url = endpoint + address + '?details=basic';
        const param: object = {
          method: 'get',
          url: url,
          headers: {
            'User-Agent': UA,
          },
          timeout: 1000,
        };
        try {
          console.log(param,"Balance Params")
          const response = await axios(param); // <-- without **
          console.log(response,"BITCOIN BALANCE");
          result.push(response); // <-- add your response to result
        } catch (e) {
          console.log(e);
          throw new Error('Unable to retrieve balance!'); //<-- here it should be if you want to create your own error
        }
        await new Promise(resolve =>
          setTimeout(resolve, GENERIC_REQUEST_THROTTLE_DELAY)
        );
      }
      
      return result; // <-- return result to get it from the outside
    };

不要忘记从外部捕获错误

try {
  const mResponses = await getBalance(mAddress);
} catch (e) {
  console.log(e);
}