Advanced-Arrows/src/main/resources/data/advancedarrows/recipes/arrow_incendiary.json

{
  "type": "minecraft:crafting_shapeless",
  "category": "combat",
  "ingredients": [
    {
      "item": "minecraft:arrow"
    },
    {
      "item": "minecraft:lava_bucket"
    }
  ],
  "result": {
    "item": "advancedarrows:arrow_incendiary"
  }
}