Jass API Trade

// Player Trade Event API | EVENT_PLAYER_TRADE_RESOURCE native GetTradeSource takes nothing returns player native SetTradeSource takes player whichPlayer returns nothing native GetTradeTarget takes nothing returns player native SetTradeTarget takes player whichPlayer returns nothing native GetTradeGold takes nothing returns integer native SetTradeGold takes integer amount returns nothing native GetTradeLumber takes nothing returns integer native SetTradeLumber takes integer amount returns nothing native IsTradeState takes tradestate whichTradeState returns boolean native SetTradeState takes tradestate whichTradeState, boolean isSet returns nothing native TradePlayerResources takes player fromPlayer, player toPlayer, integer gold, integer lumber returns nothing // This fires EVENT_PLAYER_TRADE_RESOURCE event.