How to pass string value to initiateOnDeviceConversionMeasurementWithHashedPhoneNumber?

[jerinjohnk]

initiateOnDeviceConversionMeasurementWithHashedPhoneNumber function takes a string value as input.
For example

const hashWordArray = SHA256('+15555551234');  // hash Array
const base64Hash = hashWordArray.toString(Base64);
initiateOnDeviceConversionMeasurementWithHashedPhoneNumber(
    analytics,
    base64Hash,
  );

Now whenever I try either toString() or a Base64 encoded string, as soon as

NSData *phoneNumber = [hashedPhoneNumber dataUsingEncoding:NSUTF8StringEncoding];

Breakpoint hit; the byte length is around 44.

[FIRAnalytics initiateOnDeviceConversionMeasurementWithHashedPhoneNumber:phoneNumber];

After nextline's execution, it starts throwing error
12.4.0 - [FirebaseAnalytics][I-ACS025057] Hashed phone number should be 32 bytes (256 bits)

Till creation of hasWordArray is fine according to the documentation, but I am at a loss for how to convert this to the expected string format acceptable by the library.

Firebase Version

"@react-native-firebase/app": "23.4.1",
"@react-native-firebase/crashlytics": "23.4.1",
"@react-native-firebase/database": "23.4.1",
"@react-native-firebase/in-app-messaging": "23.4.1",
"@react-native-firebase/messaging": "23.4.1",
"@react-native-firebase/remote-config": "23.4.1",

[mikehardy]

I looked into this pretty deeply and I haven't figured it out yet either! I wonder if the only users so far have been with email addresses, because I'm not sure how the phone part works, or if it ever worked.

This needs some more investigation - sorry I didn't come to an answer quickly, that would have been more satisfying. I'm open to anyone else probing more deeply if anyone gets a chance, not sure when I'll get a chance to get back to it

[jerinjohnk]

Thanks for the reply, @mikehardy.
Till now, I was trying different formats, sending it as (hex, base64, ISO-8859-1, binary strings, Uint8Array, ArrayBuffer, URL-safe Base64), thinking I was doing something wrong.