{ "buy_currency": "string", "sell_currency": "string" }
curl --location --request POST 'https://sandbox-gateway.pingpongx.com/v1/fx/trade/sp/rate/price' \ --header 'access_token;' \ --header 'Content-Type: application/json' \ --data-raw '{ "buy_currency": "string", "sell_currency": "string" }'
{ "code": 400, "message": "卖出货币缺失" }