I want to make shiny trims cause i dont have money to buy the datapack myself.

I want to create a datapack "shiny trims" i got an idea to create it myself because i dont have the money to buy the original datapack.The datapack is about when you right click an armour piece it makes so the trim on the armor glows using shaders i think.I know some stuff about datapacks and resourcepacks.I would appreaciete help thanks.