[ SnapPay Java Demo ]
Query Exchange Rate
basic_currency_unit:
*
basic_currency_unit
payment_method:
*
ALIPAY
WECHATPAY
payment_method
pay_type:
*
ONLINE
OFFLINE
pay_type
sign_key:
*
sign_key (MUST keep sign key secretly)
merchant_no:
*
merchant_no
app_id:
*
app_id
Query
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