How to make a payment with square from Dart code in flutter? - api

Question

I need make payments with square, I used square_in_app_payments plugin but it only give me a nonce string that seems I have to send it to checkout api with items information inside JSON in http request, but I don't understand how to make it.
I only tried from postman make some samples fo square.
POST /v2/locations/{{location_id}}/checkouts HTTP/1.1
Host: connect.squareup.com
Authorization: Bearer {{access_token}}
Content-Type: application/json
cache-control: no-cache
Postman-Token: 5d2c05ae-11d6-42bd-bd1e-47fa44621a98
{
"idempotency_key": "60f919ba-2042-4402-bc66-e6455ec32349",
"order": {
"reference_id": "reference_id",
"line_items": [
{
"name": "Printed T Shirt",
"quantity": "2",
"base_price_money": {
"amount": 1500,
"currency": "USD"
},
"discounts": [
{
"name": "7% off previous season item",
"percentage": "7"
},
{
"name": "$3 off Customer Discount",
"amount_money": {
"amount": 300,
"currency": "USD"
}
}
]
},
{
"name": "Slim Jeans",
"quantity": "1",
"base_price_money": {
"amount": 2500,
"currency": "USD"
}
},
{
"name": "Woven Sweater",
"quantity": "3",
"base_price_money": {
"amount": 3500,
"currency": "USD"
},
"discounts": [
{
"name": "$11 off Customer Discount",
"amount_money": {
"amount": 1100,
"currency": "USD"
}
}
],
"taxes": [
{
"name": "Fair Trade Tax",
"percentage": "5"
}
]
}
],
"discounts": [
{
"name": "Father's day 12% OFF",
"percentage": "12"
},
{
"name": "Global Sales $55 OFF",
"amount_money": {
"amount": 5500,
"currency": "USD"
}
}
],
"taxes": [
{
"name": "Sales Tax",
"percentage": "8.5"
}
]
},
"ask_for_shipping_address": true,
"merchant_support_email": "merchant+support#website.com",
"pre_populate_buyer_email": "example#email.com",
"pre_populate_shipping_address": {
"address_line_1": "1455 Market St.",
"address_line_2": "Suite 600",
"locality": "San Francisco",
"administrative_district_level_1": "CA",
"postal_code": "94103",
"country": "US",
"first_name": "Jane",
"last_name": "Doe"
}
}
I need to know how to take the nonce string from card form of square_in_app_payments plugin and send it in http request for complete the payment.