wechatpay - qrcode

{
    "amount": "0.01",
    "currency": "SGD",
    "payment_method": {
        "type": "wechatpay",
        "wechatpay": {
            "flow": "qrcode",
            "open_id": "openid"
        }
    },
    "merchant_order_id": "{{$guid}}",
    "description": "WARNING: wechat production test!",
    "metadata": {
        "request_id": "{{$guid}}"
    },
    "return_url": "https://baidu.com"
}