No function to create a saltpack.BoxPublicKey without possession of the secret key

[antonis19]

I am trying to use the EncryptArmor62Seal function to encrypt a message for another party. I am following the example here:

https://pkg.go.dev/github.com/keybase/[email protected]#EncryptArmor62Seal

The issue with the example is that the public key for the receiver is obtained based on the secret key of the receiver. So the conversion process is:

saltpack.BoxSecretKey -> saltpack.BoxPublicKey

However in a real world application you don't have (and shouldn't have) the private key of the recipient. You only have the raw bytes of the public key. But going through the documentation I found that every constructor function or import function presupposes the possession of the private key, which we don't have.

So how can I encrypt a message when all I have is my own private key and the 32 byte array raw public key of the recipient?