Migrate Carpet Mixin names to mojang mappings

src/main/java/carpet/mixins/MerchantResultSlot_scarpetEventMixin.java

@@ -0,0 +1,34 @@
+package carpet.mixins;
+
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import static carpet.script.CarpetEventServer.Event.PLAYER_TRADES;
+
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.inventory.MerchantContainer;
+import net.minecraft.world.inventory.MerchantResultSlot;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.trading.Merchant;
+
+@Mixin(MerchantResultSlot.class)
+public abstract class MerchantResultSlot_scarpetEventMixin {
+    @Shadow @Final private Merchant merchant;
+
+    @Shadow @Final private MerchantContainer slots;
+
+    @Inject(method = "onTake", at = @At(value = "INVOKE",
+            target = "Lnet/minecraft/world/item/trading/Merchant;notifyTrade(Lnet/minecraft/world/item/trading/MerchantOffer;)V")
+    )
+    private void onTrade(Player player, ItemStack stack, CallbackInfo ci) {
+        if(PLAYER_TRADES.isNeeded() && !player.level.isClientSide())
+        {
+            PLAYER_TRADES.onTrade((ServerPlayer) player, merchant, slots.getActiveOffer());
+        }
+    }
+}