Initial commit (code only without large binaries)

EdgeCommon/pkg/rpc/protos/service_price.proto

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+syntax = "proto3";
+option go_package = "./pb";
+
+package pb;
+
+// 价格相关服务
+service PriceService {
+	// 计算费用
+	rpc calculatePrice(CalculatePriceRequest) returns (CalculatePriceResponse);
+}
+
+// 计算费用
+message CalculatePriceRequest {
+	string priceType = 1;
+	double trafficGB = 2;
+	double bandwidthMB = 3;
+	int64 nodeRegionId = 4;
+}
+
+message CalculatePriceResponse {
+	double amount = 1;
+	bool hasNodeRegionPrice = 2;
+}