SRI Toolkit

A modern, robust, and framework-agnostic PHP toolkit for managing Ecuador's SRI (Servicio de Rentas Internas) electronic billing lifecycle.

It covers the complete workflow: 49-digit access key generation, XML generation with automated decimal totals, offline XSD and identity validation, XAdES-BES digital signing with PKCS#12 certificates, direct SOAP communication (reception, authorization, status querying, and batch processing), RIDE PDF rendering, and document storage.

---

Documentation

Comprehensive documentation, architectural details, and guides are available at: 👉 sri-toolkit.matizstudiocreative.com

---

Features

• Access Keys: Generation of the official 49-digit SRI access key using the modulo 11 algorithm.
• XML Generation: Compliant structure for the 6 SRI document types (Invoices, Purchase Settlements, Credit Notes, Debit Notes, Delivery Guides, and Withholding Receipts).
• Invoice Variants: Native support for export invoices (foreign trade), reimbursements, third-party charges, delivery-guide substitutes, fiscal machines, and vehicle plates.
• Exact Decimal Arithmetic: Automated balance and tax calculation derived from line items using exact decimal arithmetic (brick/money), eliminating calculation-difference rejections.
• Offline Validation: Pre-flight validation against official SRI XSD schemas and national ID check digits (Cédula / RUC) prior to signing and transmission.
• XAdES-BES Signing: Strict XMLDSig/XAdES-BES compliant digital signature using PKCS#12 (.p12 / .pfx) certificates.
• SOAP Gateway: Fully typed client for Reception, Authorization, Status Querying (ConsultaComprobante), and Batch processing (up to 50 documents / 500 kB).
• Typed Responses & Error Categorization: Real-time classification of SRI error codes into retryable states, blocking impediments, or asynchronous processing queues.
• RIDE PDF Generation: Pre-built templates (rendered via Dompdf with Code128 barcodes) for all 6 document types.
• Multi-Driver Storage: Unified DocumentStore supporting local disk and Amazon S3 (with presigned URLs).
• Encrypted Certificates: Utilities for storing PKCS#12 credentials with AES-256-GCM encryption at rest.
• End-to-End Pipeline: Unified emission orchestrator to generate, validate, sign, transmit, render RIDE, and store in a single execution flow.
• Testable Architecture: Fully mockable dependencies via interfaces (SOAP, Signer, Clock, Storage, Sleeper).

---

Requirements

• PHP: >= 8.2 (Tested on PHP 8.2, 8.3, 8.4, and 8.5)
• Extensions: ext-soap, ext-openssl, ext-dom, ext-libxml
• Package Manager: Composer

---

Installation

Install the package via Composer:

composer require matiz-studio-creative/sri-toolkit

---

Supported Documents

Code	Document Type	XML Version	Supported Features
01	Invoice (Factura)	2.1.0	Standard, Export, Reimbursements, Third-party charges
03	Purchase Settlement (Liquidación de Compra)	1.1.0	Standard, Reimbursements
04	Credit Note (Nota de Crédito)	1.1.0	Total/Partial modifications
05	Debit Note (Nota de Débito)	1.0.0	Value adjustments
06	Delivery Guide (Guía de Remisión)	1.1.0	Transportation and route tracking
07	Withholding Receipt (Comprobante de Retención)	2.0.0	Income Tax & VAT withholding

---

Quick Start

<?php

use MTZ\Toolkit\AccessKeyGenerator\AccessKeyGenerator;
use MTZ\Toolkit\AccessKeyGenerator\Data\AccessKeyData;
use MTZ\Toolkit\AccessKeyGenerator\Enums\DocumentType;
use MTZ\Toolkit\AccessKeyGenerator\Enums\Environment as AccessKeyEnvironment;
use MTZ\Toolkit\Sender\Config\SenderConfig;
use MTZ\Toolkit\Sender\Enums\Environment as SenderEnvironment;
use MTZ\Toolkit\Sender\Sender;
use MTZ\Toolkit\Signer\Signer;
use MTZ\Toolkit\XMLMaker\Data\XmlGenerationData;
use MTZ\Toolkit\XMLMaker\Enums\XmlDocumentType;
use MTZ\Toolkit\XMLMaker\Enums\XmlEnvironment;
use MTZ\Toolkit\XMLMaker\Validation\XsdValidator;
use MTZ\Toolkit\XMLMaker\XMLMaker;

// 1. Generate 49-digit Access Key
$accessKey = (new AccessKeyGenerator())->generate(
    AccessKeyData::make(
        emissionDate: '2026-05-13',
        documentType: DocumentType::Invoice,
        ruc: '1790012345001',
        environment: AccessKeyEnvironment::Testing,
        sequential: 25,
        numericCode: '12345678',
        establishmentCode: '001',
        emissionPointCode: '001',
    ),
);

// 2. Generate XML Structure
$generated = (new XMLMaker())->generate(
    XmlGenerationData::make(
        documentType: XmlDocumentType::Invoice,
        environment: XmlEnvironment::Testing,
        accessKey: $accessKey,
        data: $invoicePayload, // Check documentation for payload structure
    ),
);
$xml = $generated->toString();

// 3. Perform Offline Validation against official XSD
$errors = (new XsdValidator())->validate($xml, XmlDocumentType::Invoice);
if ($errors !== []) {
    throw new RuntimeException("Invalid XML Schema:\n" . implode("\n", $errors));
}

// 4. Digital Signature (XAdES-BES)
$signedXml = (new Signer(
    certificatePath: '/secure/path/certificate.p12',
    certificatePassword: getenv('SRI_CERTIFICATE_PASSWORD') ?: '',
))->loadXml($xml)->sign();

// 5. Transmit to SRI Web Services
$sender = new Sender(new SenderConfig(environment: SenderEnvironment::Testing));
$result = $sender->send($accessKey, $signedXml);

if (! $result->success) {
    throw new RuntimeException($result->error ?? 'SRI document authorization failed.');
}

$authorizedXml = $result->authorizationResult?->authorizedDocument?->xml;

---

Core Modules

1. Offline Validation

Prevent unnecessary network round-trips and official rejections by validating locally:

use MTZ\Toolkit\XMLMaker\Validation\IdentificationValidator;
use MTZ\Toolkit\XMLMaker\Validation\XsdValidator;

$xsdErrors = (new XsdValidator())->validate($xml, XmlDocumentType::Invoice);
$isValidRuc = (new IdentificationValidator())->isValidRuc('1760013210001');

See Validation Documentation.

2. Status Inquiries & Error Classification

Inspect detailed messages returned by the SRI:

$result = $sender->send($accessKey, $signedXml);

foreach ($result->authorizationResult?->messages ?? [] as $message) {
    if ($message->sriCode()?->isProcessing()) {
        // Code 70: SRI batch in queue, do not re-emit immediately
    }
    if ($message->sriCode()?->isImpediment()) {
        // Critical error: fix data before resending
    }
}

See Sender Module and SRI Error Codes.

3. RIDE PDF Generation

Render print-ready RIDE documents:

use MTZ\Toolkit\RideGenerator\Data\RideData;
use MTZ\Toolkit\RideGenerator\Enums\RideDocumentType;
use MTZ\Toolkit\RideGenerator\RideGenerator;

$pdf = (new RideGenerator())->generate(
    RideData::make(RideDocumentType::Invoice, $accessKey, $ridePayload),
);

$pdf->saveTo('/var/documents/ride_invoice.pdf');

See RideGenerator.

4. Storage

Save artifacts to local storage or Amazon S3:

use MTZ\Toolkit\Documents\DocumentStore;
use MTZ\Toolkit\Storage\LocalDocumentStorage;

$store = new DocumentStore(new LocalDocumentStorage('/var/documents'));
$store->putSignedXml($ruc, new DateTimeImmutable(), $accessKey, $signedXml);
$store->putRidePdf($ruc, new DateTimeImmutable(), $accessKey, $pdf->content);

See Storage.

5. End-to-End Execution Pipeline

Execute all phases in a consolidated workflow:

use MTZ\Toolkit\Pipeline\Data\DocumentEmission;
use MTZ\Toolkit\Pipeline\DocumentPipeline;
use MTZ\Toolkit\Pipeline\Signers\CertificateDocumentSigner;

$pipeline = new DocumentPipeline(
    signer: new CertificateDocumentSigner($certPath, $certPassword),
    sender: new Sender(),
    rideGenerator: new RideGenerator(),
    documentStore: new DocumentStore($storage),
);

$result = $pipeline->emit(new DocumentEmission(
    xml: $xmlGenerationData,
    ride: RideData::make(RideDocumentType::Invoice, $accessKey, $ridePayload),
    ownerKey: '1790012345001',
));

See Pipeline Module.

6. Catalogs

Common SRI codes through a runtime-overridable registry based on technical sheet v2.34:

use MTZ\Toolkit\Catalogs\Catalogs;

$registry = Catalogs::registry();
$registry->get('vat-rates', '4'); // VAT 15%
$registry->list('payment-methods');

See Catalogs.

---

Development & Testing

Run the test suite and static analysis tools locally:

# Clone the repository
git clone https://github.com/Sebas-DV/sri-toolkit.git
cd sri-toolkit

# Install dependencies
composer install

# Run tests
composer test

# Run static analysis and linting
composer stan
composer rector
composer cs

The documentation site is built with VitePress (pnpm docs:dev, pnpm docs:build).

---

Contributing

Contributions are welcome! Please feel free to submit issues, feature requests, or pull requests.

1. Fork the repository (https://github.com/Sebas-DV/sri-toolkit/fork).
2. Create your feature branch (git checkout -b feature/amazing-feature).
3. Commit your changes with descriptive messages (git commit -m 'Add support for withholding type X').
4. Push to the branch (git push origin feature/amazing-feature).
5. Open a Pull Request against main.

Please review CONTRIBUTING.md for full development standards and guidelines.

---

Security Policy

This package handles private keys, certificate passwords, signed XML, and taxpayer data.

• Store certificates outside the repository and web root.
• Keep passwords in a secret manager or protected environment variables.
• Avoid logging signed XML or SOAP traces in production.
• Review SECURITY.md for vulnerability disclosure protocols.

---

Disclaimer

This package is an open-source project and is not officially affiliated with or endorsed by the Servicio de Rentas Internas (SRI) of Ecuador.

---

License

Open-sourced software licensed under the MIT License.