add taxes

src/market/tax/tax.ts

@@ -0,0 +1,12 @@
+import { useLocalStorage } from "@vueuse/core";
+import { defineStore } from "pinia";
+
+export const useMarketTaxStore = defineStore("marketTax", () => {
+    const brokerFee = useLocalStorage("market-brokerFee", 1.5);
+    const scc = useLocalStorage("market-scc", 3.6);
+
+    const applyTaxes = (price: number, sellOrder?: boolean) => sellOrder ? price * (1 - (brokerFee.value + scc.value) / 100) : price * (1 + brokerFee.value / 100);
+    const calculateProfit = (buy: number, sell: number) => (applyTaxes(sell, true) / applyTaxes(buy)) - 1;
+    
+    return { brokerFee, scc, applyTaxes, calculateProfit };
+});