> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/merchant-tokenization/es/tokenizacion-pci/implement-pci-tokenization/process-a-transaction.md).

# Procesar una transacción

Use este flujo para destokenizar un token PCI durante un pago.

## Flujo

<figure><img src="/files/fd8883cb4d58747498db7c4d82251767a24ab74a" alt=""><figcaption><p>Flujo de transacción de tokenización PCI</p></figcaption></figure>

<table><thead><tr><th width="100">Paso</th><th>Descripción</th></tr></thead><tbody><tr><td>1</td><td>El usuario final realiza el pago en el sitio web o la aplicación del comerciante.</td></tr><tr><td>2</td><td>El comerciante o PSP llama a <code>createTransaction</code> y proporciona el <code>tokenId</code>.</td></tr><tr><td>3</td><td>El backend de Thales realiza la destokenización y devuelve el PAN y la fecha de vencimiento.</td></tr><tr><td>4</td><td>El comerciante o PSP envía la autorización usando el PAN y la fecha de vencimiento.</td></tr></tbody></table>

## API

Para la tokenización PCI, `tokenId` y `transactionType` son obligatorios.

Use la misma `createTransaction` operación para la tokenización PCI y la tokenización de la red de pago.

* Referencia de la API: [Crear transacción](broken://pages/08156055f53c693bbf24bc8205632ecabbd96544#post-v2-transactions)


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