# Real-time product information update

This flow is useful for POS who would to send an API call on each cart update event, this will allow the customer to see the order information in realtime on the EMV Pinpad device and on SensePass tag.

#### Step 1 - Send product information on every cart change <a href="#step-1-creating-a-transaction-in-setup-state" id="step-1-creating-a-transaction-in-setup-state"></a>

POST

<http://localhost:8003/api/transactions/products/update>

```json
{
    "products": [
        {
            "amount": 123,
            "discount": 0,
            "name": "First",
            "quantity": 4,
            "posIdentifier": "100001",
            "vat": 0
        },
        {
            "amount": 111,
            "discount": 0,
            "name": "Second",
            "quantity": 2,
            "posIdentifier": "invalid",
            "vat": 2
        }
    ],
    "timeout": "1000",
    "currency": "USD",
    "isCent": true,
    "amount": 1900,
    "readyForPayment": false,
} 
```

#### Step 2 - Call Init as usual once the POS is ready to accept payment (Sync/Async) <a href="#step-2-updating-transaction-data" id="step-2-updating-transaction-data"></a>

POST

<http://localhost:8003/api/transactions/init/sync> OR [http://localhost:8003/api/transactions/init](http://localhost:8003/api/transactions/init/sync)

```json
{
    "products": [
        {
            "amount": 123,
            "discount": 0,
            "name": "First",
            "quantity": 4,
            "posIdentifier": "100001",
            "vat": 0
        },
        {
            "amount": 111,
            "discount": 0,
            "name": "Second",
            "quantity": 2,
            "posIdentifier": "invalid",
            "vat": 2
        }
    ],
    "timeout": "1000",
    "currency": "USD",
    "isCent": true,
    "amount": 1900,
    "clientPhoneNumber": "789454223",
    "clientEmail": "customerEmail@gmail.com"
} 
```

<br>


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