Inconsistent grand total on shipping API

[kassner]

Related to #184

Preconditions

1. Avatax 1.5.1;
2. Magento Commerce 2.2.7;

Steps to reproduce

1. POST to the REST API endpoint /V1/guest-carts/:quoteId/shipping-information to trigger the shipping calculation;

Expected result

Consistent values between the totals.grand_total and the Grand Total item under total_segments; Consistent values between the totals.grand_total and the totals.base_grand_total if both currencies are the same;

Actual result

{
    "totals": {
        "grand_total": 110,
        "base_grand_total": 119.5,
        ...
        "total_segments": [
            {
                "code": "grand_total",
                "title": "Grand Total",
                "value": 119.5,
                "area": "footer"
            },
            ...
        }
        ...
}

Complete response:

{
    "payment_methods": [],
    "totals": {
        "grand_total": 110,
        "base_grand_total": 119.5,
        "subtotal": 100,
        "base_subtotal": 100,
        "discount_amount": 0,
        "base_discount_amount": 0,
        "subtotal_with_discount": 100,
        "base_subtotal_with_discount": 100,
        "shipping_amount": 10,
        "base_shipping_amount": 10,
        "shipping_discount_amount": 0,
        "base_shipping_discount_amount": 0,
        "tax_amount": 9.5,
        "base_tax_amount": 9.5,
        "weee_tax_applied_amount": null,
        "shipping_tax_amount": 0,
        "base_shipping_tax_amount": 0,
        "subtotal_incl_tax": 109.5,
        "shipping_incl_tax": 10,
        "base_shipping_incl_tax": 10,
        "base_currency_code": "USD",
        "quote_currency_code": "USD",
        "items_qty": 2,
        "items": [
            {
                "item_id": 3,
                "price": 50,
                "base_price": 50,
                "qty": 2,
                "row_total": 100,
                "base_row_total": 100,
                "row_total_with_discount": 0,
                "tax_amount": 9.5,
                "base_tax_amount": 9.5,
                "tax_percent": 9.5,
                "discount_amount": 0,
                "base_discount_amount": 0,
                "discount_percent": 0,
                "price_incl_tax": 54.75,
                "base_price_incl_tax": 54.75,
                "row_total_incl_tax": 109.5,
                "base_row_total_incl_tax": 109.5,
                "options": "[]",
                "weee_tax_applied_amount": null,
                "weee_tax_applied": null,
                "name": "xxx"
            }
        ],
        "total_segments": [
            {
                "code": "subtotal",
                "title": "Subtotal",
                "value": 100
            },
            {
                "code": "giftwrapping",
                "title": "Gift Wrapping",
                "value": null,
                "extension_attributes": {
                    "gw_item_ids": [],
                    "gw_price": "0.0000",
                    "gw_base_price": "0.0000",
                    "gw_items_price": "0.0000",
                    "gw_items_base_price": "0.0000",
                    "gw_card_price": "0.0000",
                    "gw_card_base_price": "0.0000"
                }
            },
            {
                "code": "shipping",
                "title": "Shipping & Handling (Flat Rate - Fixed)",
                "value": 10
            },
            {
                "code": "tax",
                "title": "Tax",
                "value": 9.5,
                "extension_attributes": {
                    "tax_grandtotal_details": [
                        {
                            "rates": [
                                {
                                    "extension_attributes": {
                                        "tax": 6
                                    },
                                    "percent": "6",
                                    "title": "CA STATE TAX"
                                },
                                {
                                    "extension_attributes": {
                                        "tax": 0.25
                                    },
                                    "percent": "0.25",
                                    "title": "CA COUNTY TAX"
                                },
                                {
                                    "extension_attributes": {
                                        "tax": 1
                                    },
                                    "percent": "1",
                                    "title": "CA SPECIAL TAX"
                                },
                                {
                                    "extension_attributes": {
                                        "tax": 2.25
                                    },
                                    "percent": "2.25",
                                    "title": "CA SPECIAL TAX"
                                }
                            ],
                            "amount": 9.5,
                            "group_id": 1
                        }
                    ]
                }
            },
            {
                "code": "grand_total",
                "title": "Grand Total",
                "value": 119.5,
                "area": "footer"
            },
            {
                "code": "customerbalance",
                "title": "Store Credit",
                "value": 0
            },
            {
                "code": "reward",
                "title": "0 Reward points",
                "value": 0
            }
        ],
        "extension_attributes": {
            "reward_points_balance": 0,
            "reward_currency_amount": 0,
            "base_reward_currency_amount": 0
        }
    }
}

[erikhansen]

Avalara has shifted how they are handling support for this extension and are no longer providing support via Github issues. If you are still experiencing this issue, please contact support@avalara.com

Sorry for the delay in replying to this issue.