Added completion on wspay

wspay/service.go

@@ -74,6 +74,27 @@ func CalculateFormSignature(shopId string, secret string, cartId string, amount
 	return hex.EncodeToString(hash.Sum(nil))
 }
 
+func CalculateCompletionSignature(shopId string, secret string, cartId string, stan string, approvalCode string, amount int64) string {
+	/**
+	Represents a signature created from string formatted from following values in a following order using
+	SHA512 algorithm:
+	ShopID
+	WsPayOrderId
+	SecretKey
+	STAN
+	SecretKey
+	ApprovalCode
+	SecretKey
+	Amount
+	SecretKey
+	WsPayOrderId
+	*/
+	signature := shopId + cartId + secret + stan + secret + approvalCode + secret + strconv.FormatInt(amount, 10) + secret + cartId
+	hash := sha512.New()
+	hash.Write([]byte(signature))
+	return hex.EncodeToString(hash.Sum(nil))
+}
+
 func CompareFormReturnSignature(signature string, shopId string, secret string, cartId string, success int, approvalCode string) error {
 	/**
 	Represents a signature created from string formatted from following values in a following order using
@@ -97,3 +118,26 @@ func CompareFormReturnSignature(signature string, shopId string, secret string,
 		return errors.New("signature mismatch")
 	}
 }
+
+func CompareCompletionReturnSignature(signature string, shopId string, secret string, stan string, actionSuccess string, approvalCode string, cartId string) error {
+	/**
+	Represents a signature created from string formatted from following values in a following order using
+	SHA512 algorithm:
+	ShopID
+	SecretKey
+	STAN
+	ActionSuccess
+	SecretKey
+	ApprovalCode
+	WsPayOrderId
+	Merchant should validate this signature to make sure that the request is originating from WSPayForm.
+	*/
+	calculatedSignature := shopId + secret + stan + actionSuccess + secret + approvalCode + cartId
+	hash := sha512.New()
+	hash.Write([]byte(calculatedSignature))
+	if hex.EncodeToString(hash.Sum(nil)) == signature {
+		return nil
+	} else {
+		return errors.New("signature mismatch")
+	}
+}

wspay/wspay.go

@@ -102,7 +102,7 @@ type WsPayCompletionRequest struct {
 	ShopId       string
 	ApprovalCode string
 	STAN         string
-	Amount       string
+	Amount       int64
 	Signature    string
 }