[Day 16] - 初探永丰银行线上收款API - 丰收款 - Sign值计算(1)

要产生sign必须要先有Nonce、HASH ID、讯息内文，
Nonce、HASH ID都已经做完了，讯息内文我就先用规格书给的OrderCreate范例好了

这边看到 要计算sign，依规则：

1.移除有空值的参数
2.移除多节点参数，如:CardParam
3.依据参数名称将参数由A~Z排序
4.将各栏位转成 PropertyName=Value 的格式, 并以"&"串接成字串
5.以SHA256计算出sign，需转大写

好多规定

以下是规格书给的内文范例，就拿它来实际跑一次流程，比较容易理解规则

{
 "ShopNo": "BA0026_001",
 "OrderNo": "C201804300001",
 "Amount": 50000,
 "CurrencyID": "TWD",
 "PayType": "C",
 "CardParam": { "AutoBilling": "Y" },
 "PrdtName": "信用卡订单",
 "ReturnURL": "http://10.11.22.113:8803/QPay.ApiClient/Store/Return",
 "BackendURL": "http://10.11.22.113:8803/QPay.ApiClient/AutoPush/PushSuccess"
}

首先，要移除空值、多节点参数，并且排序：

{
 "Amount": 50000,
 "BackendURL": "http://10.11.22.113:8803/QPay.ApiClient/AutoPush/PushSuccess",
 "CurrencyID": "TWD",
 "OrderNo": "C201804300001",
 "PayType": "C",
 "PrdtName": "信用卡订单",
 "ReturnURL": "http://10.11.22.113:8803/QPay.ApiClient/Store/Return",
 "ShopNo": "BA0026_001",
}

接着，转成 PropertyName=Value 的格式，会是这样
Amount=50000&BackendURL=http://10.11.22.113:8803/QPay.ApiClient/AutoPush/PushSuccess&CurrencyID=TWD&OrderNo=C201804300001&PayType=C&PrdtName=信用卡订单&ReturnURL=http://10.11.22.113:8803/QPay.ApiClient/Store/Return&ShopNo=BA0026_001

然後把nonce、hash ID加在後面
Amount=50000&BackendURL=http://10.11.22.113:8803/QPay.ApiClient/AutoPush/PushSuccess&CurrencyID=TWD&OrderNo=C201804300001&PayType=C&PrdtName=信用卡订单&ReturnURL=http://10.11.22.113:8803/QPay.ApiClient/Store/Return&ShopNo=BA0026_001NjM2NjY5MDQ3OTQwMzIuMTphZmJjODBhOTM5NzQ1NjMyNDFhZTczMjVjYzg0Mjg5ZjQxYTk2MWI2ZjNkYTA0NDdmOTRhZjU3ZTIzOWJlNDgz4DA70F5E2D800D50B43ED3B537480C64

转成SHA256产生的值转大写就得到sign了
379E0EB5741139418868C95EE22BF298D656D096EF46EC76B65AD3A0A967314E

把规则搞懂之後，就来用程序实作吧!