iOS: Twilio Verify for React Native: Exception while calling the API

Question

I'm using Twilio Verify for React Native and I'm getting an error (log below) when using their snippet to create a Factor:

export async function createTwilioVerifyFactor(identity) {
  const pushToken = await messaging().getToken()

  const accessTokenResponse = await getTwilioVerifyAccessToken(identity)
  const hashedIdentity = accessTokenResponse.identity
  const accessToken = accessTokenResponse.token

  try {
    const factor = await TwilioVerify.createFactor(
      new PushFactorPayload(
        // factor name
        Device.deviceName ?? 'Unknown Device',
        Constants.manifest.extra.twilioVerifyServiceSid,
        hashedIdentity,
        pushToken,
        accessToken
      )
    )
    if (!factor.sid) throw new Error('Failed to create factor')
    return factor
  } catch (e) { console.log(JSON.stringify(e, null, 2) }
}

I made sure none of the required values are null/undefined, but I'm still getting an error.

Android devices give no trouble, but iOS devices do. The try / catch block results in the following log:

{
  "nativeStackAndroid": [
    {
      "lineNumber": 95,
      "file": "FactorAPIClient.kt",
      "methodName": "invoke",
      "class": "com.twilio.verify.api.FactorAPIClient$create$2"
    },
    {
      "lineNumber": 61,
      "file": "FactorAPIClient.kt",
      "methodName": "invoke",
      "class": "com.twilio.verify.api.FactorAPIClient$create$2"
    },
    {
      "lineNumber": 68,
      "file": "NetworkAdapter.kt",
      "methodName": "execute",
      "class": "com.twilio.verify.networking.NetworkAdapter"
    },
    {
      "lineNumber": 89,
      "file": "FactorAPIClient.kt",
      "methodName": "create",
      "class": "com.twilio.verify.api.FactorAPIClient"
    },
    {
      "lineNumber": 49,
      "file": "FactorRepository.kt",
      "methodName": "create",
      "class": "com.twilio.verify.domain.factor.FactorRepository"
    },
    {
      "lineNumber": 87,
      "file": "PushFactory.kt",
      "methodName": "create",
      "class": "com.twilio.verify.domain.factor.PushFactory"
    },
    {
      "lineNumber": 55,
      "file": "FactorFacade.kt",
      "methodName": "invoke",
      "class": "com.twilio.verify.domain.factor.FactorFacade$createFactor$1"
    },
    {
      "lineNumber": 43,
      "file": "FactorFacade.kt",
      "methodName": "invoke",
      "class": "com.twilio.verify.domain.factor.FactorFacade$createFactor$1"
    },
    {
      "lineNumber": 68,
      "file": "Executor.kt",
      "methodName": "run",
      "class": "com.twilio.verify.threading.Task"
    },
    {
      "lineNumber": 1167,
      "file": "ThreadPoolExecutor.java",
      "methodName": "runWorker",
      "class": "java.util.concurrent.ThreadPoolExecutor"
    },
    {
      "lineNumber": 641,
      "file": "ThreadPoolExecutor.java",
      "methodName": "run",
      "class": "java.util.concurrent.ThreadPoolExecutor$Worker"
    },
    {
      "lineNumber": 929,
      "file": "Thread.java",
      "methodName": "run",
      "class": "java.lang.Thread"
    }
  ],
  "userInfo": null,
  "message": "{60401} Exception while calling the API",
  "code": "EUNSPECIFIED",
  "line": 5737,
  "column": 45,
  "sourceURL": "http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=my.app&modulesOnly=false&runModule=true"
}

Am I potentially doing something wrong?

Answer 1

Twilio developer evangelist here.

I see a couple of potential issues here. First, the error says:

{60401} Exception while calling the API

Error 60401 implies there was a network error. You say that this was not an issue in an emulator, but happened on real devices. Did you check those real devices' network connections?

Secondly, you're using const to declare the factor variable inside the try/catch block, however you then try to use the factor variable after the catch block. At that stage the factor is now out of scope as consts are block scoped. You'll likely get an error like "Cannot read properties of undefined". It's probably best to do the rest of your logic within the try bock.

  try {
    const factor = await TwilioVerify.createFactor(
      new PushFactorPayload(
        // factor name
        Device.deviceName ?? 'Unknown Device',
        Constants.manifest.extra.twilioVerifyServiceSid,
        hashedIdentity,
        pushToken,
        accessToken
      )
    )
    if (!factor.sid) throw new Error('Failed to create factor')

    return factor
  } catch (e) { console.log(JSON.stringify(e, null, 2) }
}