@lacspace/cart
Headless, framework-agnostic shopping-cart engine — pure, immutable & serializable. Add/merge lines, set quantities, compute tax/discount/shipping totals in integer minor units. Isomorphic (Node, edge, browser).
npm i @lacspace/cartUsage
import { createCart, addItem, setQty, totals } from "@lacspace/cart";
let cart = createCart({ currency: "NPR" });
cart = addItem(cart, { id: "sku_1", name: "Dhaka Topi", price: 120000, qty: 1 }); // paisa
cart = setQty(cart, "sku_1", 2);
const t = totals(cart, { taxRate: 0.13, shipping: 10000 });
// { subtotal, tax, shipping, discount, total } — all integer minor units, no float driftExports 8
createCartaddItemsetQtyremoveItemfindItemitemCounttotalsclearKeywords
More in Commerce & Ledger
Stock-tracking engine that prevents overselling — reserve, release, commit & restock over a plain { onHand, reserved } state. Immutable, bring-your-own-store, throws before it oversells. Isomorphic.
@lacspace/commissionCommission & payout calculation engine — flat, percentage and marginal-tiered rules with min/cap, plus exact proportional split with remainder distribution. Integer minor units, zero floats. Isomorphic.
@lacspace/settlementSettlement, netting & reconciliation for multi-party payouts — net signed ledger entries per account, reconcile expected vs actual, and list payable positive balances. Integer minor units, pure functions. Isomorphic.
@lacspace/couponDiscount & coupon engine — percent, fixed and free-shipping codes with validity windows, minimum-subtotal, discount caps and usage limits. Integer minor units, no float drift. Zero-dependency, isomorphic.
@lacspace/taxVAT & sales-tax done right — exact integer minor-unit arithmetic (no float cents bugs), add/extract tax, inclusive & exclusive prices, compound taxes, half-up/bankers rounding. Isomorphic.
@lacspace/ledgerA tiny double-entry ledger & wallet — balanced transactions, per-account balances and a trial balance that always sums to zero. Integer minor units, immutable ops, crypto-random ids. Isomorphic.