New liteserver config format

* Specify shards and seqno/utime/lt limits for liteservers in global config
* Support in lite-client, tonlib, blockchain-explorer
* Rework proxy-liteserver

lite-client/query-utils.hpp

@@ -0,0 +1,89 @@
+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#pragma once
+#include "ton/ton-types.h"
+#include "auto/tl/lite_api.h"
+#include "td/utils/port/IPAddress.h"
+#include "adnl/adnl-node-id.hpp"
+
+namespace liteclient {
+
+struct QueryInfo {
+  enum Type { t_simple, t_seqno, t_utime, t_lt, t_mc_seqno };
+  int query_id = 0;
+  ton::ShardIdFull shard_id{ton::masterchainId};
+  Type type = t_simple;
+  td::uint64 value = 0;
+  /* Query types and examples:
+   * t_simple - query to the recent blocks in a shard, or general info. value = 0.
+   *   getTime, getMasterchainInfo (shard_id = masterchain)
+   *   sendMessage
+   *   getAccountState, runSmcMethod - when no block is given
+   * t_seqno - query to block with seqno in a shard. value = seqno.
+   *   lookupBlock by seqno
+   *   getBlock, getBlockHeader
+   *   getAccountState, runSmcMethod  - when shard block is given
+   * t_utime - query to a block with given unixtime in a shard. value = utime.
+   *   lookupBlock by utime
+   * t_lt - query to a block with given lt in a shard. value = lt.
+   *   lookupBlock by lt
+   *   getTransactions
+   * t_mc_seqno - query to a block in a shard, masterchain seqno is given. value = mc_seqno.
+   *   getAccountState, runSmcMethod - when mc block is given
+   */
+
+  std::string to_str() const;
+};
+
+QueryInfo get_query_info(td::Slice data);
+QueryInfo get_query_info(const ton::lite_api::Function& f);
+
+struct LiteServerConfig {
+ private:
+  struct ShardInfo {
+    ton::ShardIdFull shard_id;
+    ton::BlockSeqno seqno;
+    ton::UnixTime utime;
+    ton::LogicalTime lt;
+  };
+
+  struct Slice {
+    std::vector<ShardInfo> shards_from, shards_to;
+    bool unlimited = false;
+
+    bool accepts_query(const QueryInfo& query_info) const;
+  };
+
+  bool is_full = false;
+  std::vector<Slice> slices;
+
+ public:
+  ton::adnl::AdnlNodeIdFull adnl_id;
+  td::IPAddress addr;
+
+  LiteServerConfig() = default;
+  LiteServerConfig(ton::adnl::AdnlNodeIdFull adnl_id, td::IPAddress addr)
+      : is_full(true), adnl_id(adnl_id), addr(addr) {
+  }
+
+  bool accepts_query(const QueryInfo& query_info) const;
+
+  static td::Result<std::vector<LiteServerConfig>> parse_global_config(
+      const ton::ton_api::liteclient_config_global& config);
+};
+
+}  // namespace liteclient