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@nestjs-fiscal/nfe

v1.0.0

Published

O pacote `nfe` contém toda a lógica específica para a emissão, validação, cancelamento e inutilização de Notas Fiscais Eletrônicas (NFe v4.00) dentro da arquitetura do NestJS Fiscal BR.

Readme

@nestjs-fiscal/nfe

O pacote nfe contém toda a lógica específica para a emissão, validação, cancelamento e inutilização de Notas Fiscais Eletrônicas (NFe v4.00) dentro da arquitetura do NestJS Fiscal BR.

Instalação

npm install @nestjs-fiscal/nfe @nestjs-fiscal/core

O que este pacote contém?

  • Use Cases Principais:
    • SubmitNFeUseCase: Fluxo completo de cálculo de impostos, preenchimento, assinatura, validação XSD e envio para a SEFAZ.
    • CancelNFeUseCase: Fluxo de cancelamento de evento de NFe.
    • InutilizarNFeUseCase: Fluxo para inutilização de numeração de NFe.
    • GenerateDanfeUseCase: Geração do PDF (DANFE) a partir do XML.
  • Builders XML:
    • NFeXmlBuilder, EnviNFeBuilder, CancelNFeBuilder, InutNFeBuilder.
  • Serviços Fiscais:
    • TaxEngineService: Motor de cálculo rudimentar para ICMS, IPI, PIS, COFINS com base no CST/CSOSN.
    • NFeSignerService: Serviço orquestrador de assinatura.
    • NFeXsdValidator: Validação estrutural do XML contra os schemas XSD oficiais da SEFAZ v4.00.
  • Gateways:
    • SoapSefazGateway: Implementação para comunicação direta via SOAP com os Web Services da SEFAZ, utilizando comunicação baseada em certificados digitais (mTLS/HTTPS).

Exemplo de Uso

Configuração do Módulo no seu sistema NestJS:

import { Module } from '@nestjs/common';
import { SubmitNFeUseCase, TaxEngineService, NFeXmlBuilder, EnviNFeBuilder, NFeXsdValidator, SoapSefazGateway } from '@nestjs-fiscal/nfe';
import { SignXmlUseCase, GenerateNFeUseCase } from '@nestjs-fiscal/core';

@Module({
  providers: [
    TaxEngineService,
    NFeXmlBuilder,
    EnviNFeBuilder,
    {
      provide: NFeXsdValidator,
      useFactory: () => new NFeXsdValidator(),
    },
    // ... Provedores base (como repositório e signXml)
    {
      provide: SubmitNFeUseCase,
      useFactory: (gen, sign, xml, val, env, tax, repo) => {
        // Inicialize com o certificado p12 da empresa para as requests SOAP
        const gateway = new SoapSefazGateway(empresaCertP12Buffer, 'senha-certificado');
        return new SubmitNFeUseCase(gen, sign, xml, val, env, gateway, tax, repo);
      },
      inject: [GenerateNFeUseCase, SignXmlUseCase, NFeXmlBuilder, NFeXsdValidator, EnviNFeBuilder, TaxEngineService, 'NFeRepository'],
    }
  ]
})
export class NFeModule {}

Executando a emissão:

const result = await this.submitNFeUseCase.execute({
  dto: nfDtoData,           // Dados do CreateNFeDTO
  idLote: '1', 
  certificateId: 'id-cert', // Para assinatura
  certificateFile: pfxBuf,  // Buffer do pfx
  password: 'senha'
});

console.log('Chave de Acesso:', result.accessKey);
console.log('Resposta da SEFAZ:', result.sefazResponse);