fz-survival-datapack/data/fz/advancements/game_event/on_piglin_trade.json

{
    "parent": "fz:game_event",
    "criteria": {
        "on_piglin_trade": {
            "trigger": "minecraft:thrown_item_picked_up_by_entity",
            "conditions": {
                "player": [
                    {
                        "condition": "minecraft:reference",
                        "name": "fz:is_real_player"
                    }
                ],
                "entity": {
                    "type": "minecraft:piglin",
                    "flags": {
                        "is_baby": false
                    }
                }
            }
        }
    },
    "rewards": {
        "function": "fz:game_event/advancement/on_piglin_trade"
    }
}