Paypal gateway failing on version 1.8

[guidoferreyra]

I just updated merx from 1.7.x to 1.8.1 and when using Paypal gateway I get the following error:

The payment could not be initialized."
--
key | "error.merx.initializePayment"
file | ".../site/plugins/merx/src/Merx.php"
line | 256
details | Object { message: 'Undefined array key "id"', code: 2, file: ".../site/plugins/merx/src/Gateways.php", … }
message | 'Undefined array key "id"'
code | 2
file | ".../site/plugins/merx/src/Gateways.php"
line | 56
code | 500

Let me know how can I help you to debug this.

[tobiasfabian]

Hi @guidoferreyra,

thanks for your report.

This must be an error from the PayPal API. I have added error handling for such PayPal API errors to the develop branch. (0601716)
You can download and install the latest commit and check the error message for further details.

The error response will look something like this:

{
    "status": "error",
    "message": "PayPal error",
    "code": 400,
    "key": "error.merx.paypalError",
    "details": {
        "paypalResponse": {
            "name": "INVALID_REQUEST",
            "message": "Request is not well-formed, syntactically incorrect, or violates schema.",
            "debug_id": "8314d1585f68e",
            "details": [
                {
                    "field": "/purchase_units/@reference_id=='default'/amount/currency_code",
                    "value": "",
                    "location": "body",
                    "issue": "MISSING_REQUIRED_PARAMETER",
                    "description": "A required field / parameter is missing."
                }
            ],
            "links": [
                {
                    "href": "https://developer.paypal.com/docs/api/orders/v2/#error-MISSING_REQUIRED_PARAMETER",
                    "rel": "information_link",
                    "encType": "application/json"
                }
            ]
        }
    }
}

Let me know if this solves your problem.