Re-arrange multi-transaction orders so that commission is last.

[drewangell]

Details

Currently, the order of transactions included in our request to PayPal is putting the commission amount (the smaller amount) first. This makes it show up above the actual product/service payment on PayPal and Woo receipts.

We need to re-arrange this so that the commission payment is always last. That way it will display the actual products/services and their amounts, with the commission coming at the bottom.

Sample of Current Request

Notice in the sample that PAYMENTREQUEST_0 is the commission amount of 2.34 while PAYMENTREQUEST_1 is the actual product amount. This should be reversed.

The commission should always come last no matter how many payments are included on the order.

2021-03-03T17:21:36+00:00 INFO DoExpressCheckoutPayment Request: Array
(
    [USER] => *****
    [PWD] => *****
    [VERSION] => 124.0
    [SIGNATURE] => *****
    [METHOD] => DoExpressCheckoutPayment
    [TOKEN] => EC-3D4146463Y3536014
    [PAYERID] => *****
    [RETURNFMFDETAILS] => 1
    [PAYMENTREQUEST_0_AMT] => 2.34
    [PAYMENTREQUEST_0_CURRENCYCODE] => GBP
    [PAYMENTREQUEST_0_CUSTOM] => {"order_id":211077,"order_key":"wc_order_oQuDHpBnlP40O","order_item_id":148}
    [PAYMENTREQUEST_0_INVNUM] => SA-211077-148
    [PAYMENTREQUEST_0_PAYMENTACTION] => Sale
    [PAYMENTREQUEST_0_SELLERPAYPALACCOUNTID] => *****
    [PAYMENTREQUEST_0_PAYMENTREQUESTID] => 148-2091053544
    [PAYMENTREQUEST_0_ITEMAMT] => 2.34
    [PAYMENTREQUEST_0_SHIPPINGAMT] => 0.00
    [PAYMENTREQUEST_0_TAXAMT] => 0.00
    [L_PAYMENTREQUEST_0_NAME0] => Operation Template - Side A
    [L_PAYMENTREQUEST_0_AMT0] => 2.34
    [L_PAYMENTREQUEST_0_QTY0] => 1
    [PAYMENTREQUEST_1_AMT] => 46.65
    [PAYMENTREQUEST_1_CURRENCYCODE] => GBP
    [PAYMENTREQUEST_1_CUSTOM] => {"order_id":211077,"order_key":"wc_order_oQuDHpBnlP40O"}
    [PAYMENTREQUEST_1_INVNUM] => SA-211077-fees
    [PAYMENTREQUEST_1_PAYMENTACTION] => Sale
    [PAYMENTREQUEST_1_SELLERPAYPALACCOUNTID] => *****
    [PAYMENTREQUEST_1_PAYMENTREQUESTID] => 1405205022603fc599319e14.67905980
)