Emitir una factura

import { mkdir, readFile, writeFile } from 'node:fs/promises'
import {
  PAYMENT_TERMS,
  createEnvelope,
  createSiiClient,
  encodeLatin1,
  isDteError,
  issueDocument,
  loadCertificateFromPkcs12,
  parseCaf,
  queryDocumentStatus,
  signEnvelope,
  uploadEnvelope,
  waitForUploadStatus,
  type DteError,
} from 'dte-sdk'
import { createDirectoryCapture, createDirectoryFolioRegistry, createDirectoryUploadArchive } from 'dte-sdk/node'
 
const COMPANY_RUT = '76543210-3'
const ENVIRONMENT = 'certification'
 
// Lo que el SII le dio a esta empresa para este ambiente (en certificación el número es 0)
const resolution = {
  date: process.env.SII_RESOLUTION_DATE!, // AAAA-MM-DD
  number: Number(process.env.SII_RESOLUTION_NUMBER ?? 0),
}
 
const certificate = loadCertificateFromPkcs12(await readFile('firma.pfx'), process.env.PFX_PASSWORD!)
const caf = parseCaf(await readFile('caf-33.xml', 'latin1')) // Los archivos CAF son ISO-8859-1
 
// Control local de los folios de este CAF: un archivo JSON, un proceso
const folios = createDirectoryFolioRegistry({ dir: './data/folios' })
const scope = { companyRut: COMPANY_RUT, type: 33, range: caf.range, environment: ENVIRONMENT } as const
 
const sii = createSiiClient({
  environment: ENVIRONMENT,
  certificate,
  companyRut: COMPANY_RUT,
  capture: createDirectoryCapture({ dir: './data/capture' }), // cada intercambio HTTP, con los secretos tachados
  archive: createDirectoryUploadArchive({ dir: './data/uploads' }), // los bytes exactos de cada envío
})
 
try {
  // 1. Reservar el siguiente folio libre del CAF
  const folio = await folios.reserve(scope)
  console.log(`folio ${folio} reserved in the range ${caf.range.from}-${caf.range.to}`)
 
  // 2. Crear, timbrar (TED) y firmar la factura
  const invoice = issueDocument({
    document: {
      type: 33,
      folio,
      issuer: {
        rut: COMPANY_RUT,
        businessName: 'Comercial Andina SpA',
        businessActivity: 'Software',
        activityCode: 620200,
        address: 'Av. Los Aromos 1540',
        commune: 'Santiago',
      },
      receiver: {
        rut: '12345678-5',
        businessName: 'Comercializadora Rapel Ltda',
        businessActivity: 'Comercio',
        address: 'Pasaje Los Olmos 88',
        commune: 'Providencia',
      },
      items: [
        { name: 'Plan anual', quantity: 1, unitPrice: 100000, discountPercent: 10 },
        { name: 'Horas de soporte', quantity: 3, unit: 'HRS', unitPrice: 25000 },
        { name: 'Curso de capacitación', quantity: 2, unitPrice: 45000, exempt: true },
      ],
      options: { paymentTerms: PAYMENT_TERMS.cash },
    },
    caf,
    certificate,
  })
  const { totals } = invoice.header
  console.log('totals', JSON.stringify(totals))
 
  // 3. Envolverla en un EnvioDTE y firmar el SetDTE
  const envelope = signEnvelope(
    createEnvelope({
      kind: 'dte',
      documents: [invoice],
      cover: {
        issuerRut: COMPANY_RUT,
        senderRut: certificate.rut!, // el titular del certificado firma y envía
        resolutionDate: resolution.date,
        resolutionNumber: resolution.number,
      },
    }),
    certificate,
  )
 
  // 4. Guardar el XML firmado antes de enviarlo: es el documento legal
  await mkdir('./data/signed', { recursive: true })
  const file = `./data/signed/33-${folio}.xml`
  await writeFile(file, encodeLatin1(envelope.xml))
  console.log(`signed envelope saved to ${file}`)
 
  // 5. Enviarla y registrar el folio como enviado
  const upload = await uploadEnvelope(sii, { envelope })
  await folios.markSent(scope, folio, { trackId: upload.trackId })
  console.log(`uploaded: track id ${upload.trackId}${upload.duplicate ? ' (the SII already had it)' : ''}`)
 
  // 6. Esperar a que el SII termine con el sobre (consulta cada 5 s, se rinde a los 10 min)
  const status = await waitForUploadStatus(sii, { trackId: upload.trackId })
  const counts = status.counts ?? { reported: 0, accepted: 0, rejected: 0, objections: 0 }
  console.log(`envelope ${status.code} ${status.status}: ${status.message}`, JSON.stringify(counts))
 
  if (status.status === 'rejected' || counts.rejected > 0) {
    console.error('The SII rejected the envelope or a document in it. Check data/capture and data/uploads.')
    process.exitCode = 1
  } else {
    if (status.status === 'acceptedWithObjections' || counts.objections > 0)
      console.warn('Accepted with objections. The answer of the SII is in status.raw.')
 
    // 7. Preguntar al SII por el documento mismo
    const document = await queryDocumentStatus(sii, {
      receiverRut: invoice.header.receiver.rut,
      type: 33,
      folio,
      issueDate: invoice.header.issueDate,
      totalAmount: totals.totalAmount,
    })
    console.log(`document ${document.code} ${document.status}: ${document.message}`)
  }
} catch (error) {
  if (!isDteError(error)) throw error
  explain(error)
  process.exitCode = 1
}
 
function explain(error: DteError): void {
  switch (error.code) {
    case 'CAF_EXPIRED':
      console.error('The CAF is more than six months old: ask the SII for a new one.')
      break
    case 'FOLIO_OUT_OF_RANGE':
      console.error('No folios left in this CAF: ask the SII for a new one.')
      break
    case 'SII_UPLOAD_REJECTED':
      console.error('The SII refused the file.', error.details.status, error.details.errors)
      break
    case 'WAIT_TIMEOUT':
      console.error('The SII is still working on it. Ask again later with the track id:', error.details.trackId)
      break
    default:
      console.error(error.code, error.details)
  }
}

folio 1 reserved in the range 1-100
totals {"netAmount":165000,"exemptAmount":90000,"vatRate":19,"vatAmount":31350,"totalAmount":286350}
signed envelope saved to ./data/signed/33-1.xml
uploaded: track id 4503218
envelope EPR accepted: Envío procesado {"reported":1,"accepted":1,"rejected":0,"objections":0}
document DOK received: Documento recibido por el SII, datos coinciden