does anyone know if there is a way to add another currency for villagers? I made a mod that adds money and would like to know if it's possible to add something like this.

You're probably going to have to rewrite some of the villager code... but I'll point you toward EntityVillager.addMerchantItem()

I was hoping I wouldn't have to modify the base code. maybe forge can add a hook for that.

Will this be for Vanilla Villagers or Custom Villagers?

both

For Custom Villagers you can just use a trade handler. Here is one of mine:

package dudesmods.lozmod;

import java.util.Random;

import net.minecraft.entity.passive.EntityVillager;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.village.MerchantRecipe;
import net.minecraft.village.MerchantRecipeList;
import cpw.mods.fml.common.registry.VillagerRegistry.IVillageTradeHandler;

public class villagerBeedleTradeHandler implements IVillageTradeHandler {

@Override
public void manipulateTradesForVillager(EntityVillager villager, MerchantRecipeList recipeList, Random random) {
	//30 rupees for 1 potion
	recipeList.add(new MerchantRecipe(new ItemStack(LOZmod.ruppe, 3, 2), new ItemStack(Item.potion, 1, 8229)));
	//30 bombs = 100 rupees
	recipeList.add(new MerchantRecipe(new ItemStack(LOZmod.ruppe, 1, 5), new ItemStack(LOZmod.bomb, 30)));

}

}

 

How it's used:

recipeList.add(new MerchantRecipe(new ItemStack(Input), new ItemStack(Output)));
recipeList.add(new MerchantRecipe(new ItemStack(Input 1),new ItemStack(Input 2), new ItemStack(Output)));

 

Bit from main mod class:

VillagerRegistry.instance().registerVillagerType(7, "/dudesmods/lozmod/villagerBeedle.png"); //id must be greater than 6
	villagerBeedleTradeHandler newBeedleTradeHandler = new villagerBeedleTradeHandler();
	VillagerRegistry.instance().registerVillageTradeHandler(7, newBeedleTradeHandler);
	VillagerRegistry.instance().getRegisteredVillagers();

but that still doesn't help me make all trades useable with emeralds OR the money added by my mod.