curl --location --request POST 'https://sb-openapi.hitechpay.vn/v2/agreement/balance' \
--header 'Content-Type: application/json' \
--data-raw '{
"app_id": 0,
"identifier": "string",
"pay_token": "string",
"req_date": 0,
"amount": 0,
"mac": "string"
}'{
"return_code": 0,
"return_message": "string",
"sub_return_code": 0,
"sub_return_message": "string",
"data": [
{
"channel": 0,
"payable": true,
"bank_code": "string"
}
],
"discount_amount": 0
}