[BUG] Sender/receiver number and name not detected reliably in Business accounts & groups (contact.number is undefined)

[owaisamir01]

Is there an existing issue for this?

• I have searched the existing issues.

Is this a problem caused by your code, or is it specifically because of the library?

• I have double-checked my code carefully.

Describe the bug.

In WhatsApp Business accounts and in group chats, contact.number is almost always undefined, and names (pushname, name) are missing or incorrect.
Even after doing client.getContactById(), the sender/receiver number and proper name are not fetched reliably.

This is the #1 problem faced by 90% of developers using whatsapp-web.js with Business accounts.

Current unreliable behaviour

const contact = await client.getContactById(message.from);
console.log(contact.number); // → undefined (in Business accounts)
console.log(contact.pushname); // → undefined or wrong

### Expected Behavior


In WhatsApp Business accounts and in group chats, `contact.number` is almost always `undefined`, and names (`pushname`, `name`) are missing or incorrect.  
Even after doing `client.getContactById()`, the sender/receiver number and proper name are not fetched reliably.

This is the #1 problem faced by 90% of developers using whatsapp-web.js with Business accounts.

### Current unreliable behaviour
```js
const contact = await client.getContactById(message.from);
console.log(contact.number); // → undefined (in Business accounts)
console.log(contact.pushname); // → undefined or wrong

### Steps to Reproduce the Bug or Issue

   let senderName = 'N/A';
        let receiverName = 'N/A';
        try {
            const senderContact = await client.getContactById(message.from);
            senderName = senderContact.pushname || senderContact.name || 'N/A';
        } catch (e) {}
        
        try {
            const receiverContact = await client.getContactById(message.to);
            receiverName = receiverContact.pushname || receiverContact.name || 'N/A';
        } catch (e) {}

        // === 2. Apna real number (connected number) ===
        const myNumber = client.info?.wid?._serialized?.split('@')[0] || 'unknown';

        // === 3. Real sender & receiver numbers ===
        let senderNumber = 'unknown';
        let receiverNumber = 'unknown';

        // Sender: agar hum khud bhej rahe hain to myNumber, warna contact.number
        if (message.from.includes(myNumber) || message.from === client.info?.wid?._serialized) {
            senderNumber = myNumber;
        } else {
            try {
                const contact = await client.getContactById(message.from);
                senderNumber = contact.number || (message.author || message.from).split('@')[0];
            } catch (e) {
                senderNumber = (message.author || message.from).split('@')[0];
            }
        }

        // Receiver: agar hum receive kar rahe hain to myNumber, warna contact.number
        if (message.to.includes(myNumber) || message.to === client.info?.wid?._serialized) {
            receiverNumber = myNumber;
        } else {
            try {
                const contact = await client.getContactById(message.to);
                receiverNumber = contact.number || message.to.split('@')[0];
            } catch (e) {
                receiverNumber = message.to.split('@')[0];
            }
        }


### WhatsApp Account Type

Standard

### Browser Type

chromium

### Operation System Type

window|ubantu

### Phone OS Type

Android |IOS

### WhatsApp-Web.js Version

 "whatsapp-web.js": "^1.34.2"

### WhatsApp Web Version

 "whatsapp-web.js": "^1.34.2"

### Node.js Version

v20.13.0

### Authentication Strategy

LocalAuth

### Additional Context

_No response_

[tyasa2000]

const contact = await client.getContactById(message.from);
change -->
const contact = await client.getContactLidAndPhone(message.from);
console.log(contact[0].pn)

[sawa-siemens]

Thanks. This work on version 1.34.4 for business account (Your Bot) to resolve others's real phone number, by using getContactLidAndPhone() API.

const lidPhoneResult = await Whatsapp.getClient().getContactLidAndPhone([msg.author!]);
const realPhoneNumberAtCDotUs = lidPhoneResult?.[0]?.pn;