mwg API
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    Interface Price

    A buy/sell transaction between two Inventorys, paid for from a StatBlock stat acting as currency - the same role craft() fills for a recipe: check everything first, touch nothing until every check passes, and if any later step fails (the buyer's bag has no room), roll back whatever the earlier steps already did rather than losing stock or coin for nothing.

    import { buy, sell, StatBlock, Inventory, type ShopOptions } from '@datamoc/mw_games/actors';

    const wallet = new StatBlock({ base: { gold: 100 } });
    const shopStock = new Inventory();
    shopStock.add({ id: 'potion', quantity: 10, stackable: true });
    const bag = new Inventory();

    const options: ShopOptions = { currency: 'gold', prices: new Map([['potion', { buy: 15, sell: 5 }]]) };

    buy(wallet, shopStock, bag, 'potion', 2, options); // 30 gold spent, 2 potions in bag
    sell(wallet, shopStock, bag, 'potion', 1, options); // 5 gold refunded
    interface Price {
        buy: number;
        sell: number;
    }
    Index
    buy sell
    buy: number

    cost to buy one unit from the shop

    sell: number

    amount refunded per unit sold to the shop

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