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@lacspace/invoice

v1.1.0Commerce & Ledger0 deps

Invoice model, numbering and tax-rollup engine — per-line and total calculation, tax grouped by rate, sequential invoice numbers, a status lifecycle, partial payments, credit notes and a render-ready row structure for PDF/XLSX. Integer minor units, zero-dependency, isomorphic.

npm i @lacspace/invoice
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Usage

invoice.ts
import { createInvoice, recordPayment, invoiceNumber } from "@lacspace/invoice";

let inv = createInvoice({
  number: invoiceNumber(123),         // "INV-2026-000123"
  currency: "NPR",
  seller: { name: "Lacspace", taxId: "PAN123" },
  buyer:  { name: "Sita Rai" },
  lines: [{ description: "Dhaka Topi", qty: 2, unitPrice: 120000, taxRate: 0.13 }],
});
// inv.taxSummary groups tax by rate; inv.totals.balanceDue in integer paisa
inv = recordPayment(inv, 271200);     // status -> "paid", balanceDue -> 0

Exports 8

createInvoicerecordPaymentmarkVoidmarkIssuedisOverdueinvoiceNumberrenderRowsInvoiceError

Keywords

invoiceinvoicingbillingtaxaccountingecommerce

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@lacspace/inventory

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@lacspace/tax

VAT & sales-tax done right — exact integer minor-unit arithmetic (no float cents bugs), add/extract tax (inclusive & exclusive), multiple & compound taxes with a labelled breakdown, category rate tables, reverse charge, and line-level vs invoice-level rounding. Isomorphic.

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