Coinbase Commerce api return a 400 error because "pricing_type" is required

Question

const query = {
               name: 'The Sovereign Individual',
               description: 'Mastering the Transition to the Information Age',
               local_price: {
                   amount: '100.00',
                   currency: 'USD',
                },
               pricing_type: 'fixed_price',
               metadata: {
                   customer_id: 'id_1005',
                   customer_name: 'Satoshi Nakamoto',
               },
               redirect_url: 'https://charge/completed/page',
               cancel_url: 'https://charge/canceled/page',
           };
           const opts = {
               method: 'POST',
               headers: {
                   'Content-Type': 'application/json',
                   'X-CC-Api-Key': 'api_key',
                   'X-CC-Version': '2018-03-22',
               },
               body: JSON.stringify({
                   query
               }),
           };

            fetch('https://api.commerce.coinbase.com/charges', opts)
                .then(res => res.json())
                .then(jsonRes => console.log(jsonRes));

and the response is this

error:{
   message: "Required parameter missing: pricing_type"
   type: "invalid_request"
}

but i passed the pricing_type parameter as you can see,but i keep getting a 400 error with the response invalid request

who has an idea how i can solve this

Answer 1

body:enter code here JSON.stringify({query})

I believe it should be

body: JSON.stringify(query)

Edit: It's the wrong formatted JSON

Double quotes are standard practice but some services use incorrect formats. pricing_type: 'fixed_price'=>"pricing_type": 'fixed_price'