# WarriorsLib.TradeGood

## `WarriorsLib.TradeGood(buildingID, goodtype, amount, player)`

Specifies what goods and how many a market or harbor shall transport. Use [WarriorsLib.SetTradingRoute](https://docs.settlers-united.com/s4-warriorslib-en/warriorslib-functions/warriorslib.settradingroute) to establish the destination building for the trade.

#### return value

* **Since Version 1.5.0**: success \[0, 1]
* Before: none

```lua
b1 = Buildings.GetFirstBuilding(1, Buildings.MARKETPLACE)
b2 = Buildings.GetFirstBuilding(3, Buildings.MARKETPLACE)
WarriorsLib.SetTradingRoute(b2, b1, 3)
WarriorsLib.TradeGood(b2, Goods.GOLDBAR, 100, 3)
```