How do I create a classic shader without any colors?

[Lepoulet003]

The problem is that I can t use a shader without any information of color on. Even if I simply delete the color the decals are black. I already made this shader in unreal but I can t find a way to do it in unity. I just want to create a shader that read only the normal map and the alpha.

[lestatos86]

Maybe this link could help you :

Shader Graph