How can i get the payee public key from the payment request

Question

I'm trying to get the payees public key (destination node) from the payment request. You can see an example here.

In the source code for (https://lightningdecoder.com/) it seems like they get it from a tag or tag 19 (?) but I can't find this information in the decoded payment requests i get from LND:

https://github.com/andrerfneves/lightning-decoder/blob/0fd4bdcd9ec01e8bacd0a475543186ad2de3fe27/src/lib/bolt11.js#L386-L394

Does any one know how to get this? Preferably using Go and the invoice returned by LND

Answer 1

Here is the solution I ended up using:

// var invoice *lnrpc.Invoice

inva, err := zpay32.Decode(invoice.PaymentRequest, &chaincfg.MainNetParams)
if err != nil {
    return err
}

fmt.Sprintf("%x", inva.Destination.SerializeCompressed())

Alternatively, I think you can replace the fmt.Sprintf with hex.EncodeToString

hex.EncodeToString(inva.Destination.SerializeCompressed())