Voluntary phone-number sharing

const requestId = await client.requestPhoneNumber('447700900123@c.us');
// Only when your application intends to disclose its own account number:
const shareId = await client.sharePhoneNumber('447700900123@c.us');

requestPhoneNumber sends WhatsApp's native share-number request to a direct LID chat. The recipient decides whether to share. It does not look up a hidden number or force the recipient to disclose it.

sharePhoneNumber sends the native protocol message for sharing the signed-in account's own number and updates WhatsApp's per-contact sharing metadata. It accepts a destination only, never an arbitrary number to disclose. Both methods return a submitted message ID; ACKs indicate delivery, and recipient sharing is a separate action.

Receiver behavior depends on WhatsApp's account and client support. Receiving a request does not confirm that the recipient's share response succeeded. Inspect the chat before retrying an uncertain submission.