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@dimerso/farol

v0.2.0

Published

Cliente TypeScript oficial de la API de Farol (facturación electrónica y gestión para pymes en Costa Rica).

Readme

@dimerso/farol

Cliente TypeScript oficial de la API de Farol. Sin dependencias; funciona en Node ≥ 18, Deno, Bun y Workers (usa fetch y WebCrypto).

npm install @dimerso/farol
import { Farol } from '@dimerso/farol';

const farol = new Farol({ apiKey: process.env.FAROL_API_KEY! });

const me = await farol.me();
console.log(me.tenant?.name, me.apiKey.environment, me.rateLimits);

// Clientes y productos, con paginación por cursor
for await (const customer of farol.customers.iterate({ isActive: true })) {
  console.log(customer.name);
}

// Emitir un tiquete (202: queda encolado hacia Hacienda)
const doc = await farol.documents.create(
  {
    type: '04',
    lines: [
      {
        cabysCode: '0702000000100',
        description: 'Tomate',
        quantity: 2,
        unitPrice: 500,
        taxRate: 0.01,
        isProduct: true,
      },
    ],
    payment: { method: '01', condition: '01' },
  },
  { idempotencyKey: 'pedido-1234' }, // reusá la misma clave al reintentar
);

// Estado final: por webhook o consultando
const detail = await farol.documents.get(doc.id);
if (detail.status === 'ACCEPTED') {
  const xml = await farol.documents.xml(doc.id);
}

Errores

Toda respuesta no-2xx lanza FarolError con code estable (unauthorized, forbidden_scope, validation_failed, rate_limited, fiscal_config_missing, …), status, requestId, problem.errors por campo y retryAfterSeconds cuando aplica.

import { FarolError } from '@dimerso/farol';
try {
  await farol.customers.create({
    name: 'Ana',
    identification: { type: '01', number: '101110111' },
  });
} catch (e) {
  if (e instanceof FarolError && e.code === 'conflict') {
    /* ya existe */
  }
}

Webhooks

import { verifySignature } from '@dimerso/farol';

app.post('/farol/webhook', express.raw({ type: '*/*' }), async (req, res) => {
  const ok = await verifySignature(
    process.env.FAROL_WEBHOOK_SECRET!,
    req.body.toString('utf8'),
    req.header('Farol-Signature'),
  );
  if (!ok) return res.sendStatus(400);
  const event = JSON.parse(req.body.toString('utf8'));
  // event.id (dedupe), event.event, event.data
  res.sendStatus(200);
});

Verificá siempre sobre el cuerpo crudo (no re-serialices el JSON). Tolerancia de 5 minutos por defecto.

Entornos

Las llaves sk_test_ leen y escriben todo, pero no emiten documentos fiscales reales (fiscal_config_missing). Especificación completa: https://farol.dimerso.com/api/v1/openapi.json.