minecraft-assets/data/minecraft/recipes/ender_chest.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "###",
    "#E#",
    "###"
  ],
  "key": {
    "#": {
      "item": "minecraft:obsidian"
    },
    "E": {
      "item": "minecraft:ender_eye"
    }
  },
  "result": {
    "item": "minecraft:ender_chest"
  }
}