Vietnam Invoices (MISA meInvoice create, publish & query)

STEP 1 of the MISA meInvoice flow: create a Vietnamese e-invoice (hóa đơn điện tử) draft on MISA — the POST /itg/invoicepublishing/createinvoice call. You supply seller, buyer and line items; this server computes the Vietnamese VAT (thuế GTGT) math locally in VND (integer đồng — no decimals) and forwards the payload. MISA returns a transaction_id, ref_id and invoice_data (an UNSIGNED invoice XML). This server does NOT sign: you then sign invoice_data MERCHANT-SIDE with your own digital signature…

STEP 3 of the MISA meInvoice flow: publish an ALREADY-SIGNED e-invoice — the POST /itg/invoicepublishing call. After create_invoice returns invoice_data (unsigned XML) and you sign it MERCHANT-SIDE with your USB Token (chữ ký số) via the MISA local signing service, pass the signed XML back here with its transaction_id and ref_id. MISA submits it to the tax authority (Tổng cục Thuế) and returns the official inv_no (số hóa đơn), inv_code (mã cơ quan thuế, for coded invoices) and inv_series. This s…

Look up the status of one or more published e-invoices — the POST /itg/invoicepublished/invoicestatus call (read-only). Pass the transaction_id(s) returned by create_invoice/publish_invoice. Result per invoice: publish_status (MISA SaveInvoiceStatus int — draft/published state), send_tax_status + send_tax_status_label = the tax-authority (cơ quan thuế) submission status. For invoices WITHOUT a code (không mã): 0=not sent, 1=sent, 2=accepted, 3=rejected, 4=send error. For invoices WITH a code (có…