I want to know how I can setup my own attributes using Iris shaders

[Almazoioio]

I want to implement my idea into Minecraft and I need to know how to create my own attribites, basicaly I decided to look for any code inside Iris and found method: "bindAttributeLocation" but this method have no usages, so I definitely lost for several hours by that point
I'm using Iris 1.7 1.20.4 for my idea...

[Almazoioio]

Ok, I did saw all the code associated with the attributes and I don't want to implement an entire bunch of code so, I decided to alter gl_Color, but I couldn't find in all that enormous code where I can alter gl_Color value (this will help me achieve my goal)

[Almazoioio]

ok, I must admit: Shader transformation - very interesting and somewhat brilliant thing... RN I'm suprised (Iris is a another one super-complicated but clever programm like minecraft itself)

[Almazoioio]

And now I did realised that, I do need custom attrib...