支持购买套餐/续费套餐/用户账户操作等

pkg/rpc/protos/service_user_account_daily_stat.proto

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+syntax = "proto3";
+option go_package = "./pb";
+
+package pb;
+
+// 用户账户统计服务
+service UserAccountDailyStatService {
+	// 列出按天统计
+	rpc listUserAccountDailyStats(ListUserAccountDailyStatsRequest) returns (ListUserAccountDailyStatsResponse);
+
+	// 列出按月统计
+	rpc listUserAccountMonthlyStats(ListUserAccountMonthlyStatsRequest) returns (ListUserAccountMonthlyStatsResponse);
+}
+
+// 列出按天统计
+message ListUserAccountDailyStatsRequest {
+	string dayFrom = 1;
+	string dayTo = 2;
+}
+
+message ListUserAccountDailyStatsResponse {
+	repeated Stat stats = 1;
+
+	message Stat {
+		string day = 1; // YYYYMMDD
+		float income = 2;
+		float expense = 3;
+	}
+}
+
+// 列出按月统计
+message ListUserAccountMonthlyStatsRequest {
+	string dayFrom = 1;
+	string dayTo = 2;
+}
+
+message ListUserAccountMonthlyStatsResponse {
+	repeated Stat stats = 1;
+
+	message Stat {
+		string month = 1; // YYYYMM
+		float income = 2;
+		float expense = 3;
+	}
+}