initial commit

validator/impl/external-message.cpp

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+/*
+    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/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#include "external-message.hpp"
+#include "vm/boc.h"
+#include "block/block-parse.h"
+#include "block/block-auto.h"
+#include "block/block-db.h"
+
+namespace ton {
+
+namespace validator {
+using td::Ref;
+
+ExtMessageQ::ExtMessageQ(td::BufferSlice data, td::Ref<vm::Cell> root, AccountIdPrefixFull addr_prefix)
+    : root_(std::move(root)), addr_prefix_(addr_prefix), data_(std::move(data)) {
+  hash_ = block::compute_file_hash(data_);
+}
+
+td::Result<Ref<ExtMessageQ>> ExtMessageQ::create_ext_message(td::BufferSlice data) {
+  if (data.size() > max_ext_msg_size) {
+    return td::Status::Error("external message too large, rejecting");
+  }
+  vm::BagOfCells boc;
+  auto res = boc.deserialize(data.as_slice());
+  if (res.is_error()) {
+    return res.move_as_error();
+  }
+  if (boc.get_root_count() != 1) {
+    return td::Status::Error("external message is not a valid bag of cells");  // not a valid bag-of-Cells
+  }
+  auto ext_msg = boc.get_root_cell();
+  if (ext_msg->get_level() != 0) {
+    return td::Status::Error("external message must have zero level");
+  }
+  vm::CellSlice cs{vm::NoVmOrd{}, ext_msg};
+  if (cs.prefetch_ulong(2) != 2) {  // ext_in_msg_info$10
+    return td::Status::Error("external message must begin with ext_in_msg_info$10");
+  }
+  ton::Bits256 hash{ext_msg->get_hash().bits()};
+  if (!block::gen::t_Message_Any.validate_ref(ext_msg)) {
+    return td::Status::Error("external message is not a (Message Any) according to automated checks");
+  }
+  if (!block::tlb::t_Message.validate_ref(ext_msg)) {
+    return td::Status::Error("external message is not a (Message Any) according to hand-written checks");
+  }
+  block::gen::CommonMsgInfo::Record_ext_in_msg_info info;
+  if (!tlb::unpack_cell_inexact(ext_msg, info)) {
+    return td::Status::Error("cannot unpack external message header");
+  }
+  auto dest_prefix = block::tlb::t_MsgAddressInt.get_prefix(info.dest);
+  if (!dest_prefix.is_valid()) {
+    return td::Status::Error("destination of an inbound external message is an invalid blockchain address");
+  }
+  return Ref<ExtMessageQ>{true, std::move(data), std::move(ext_msg), dest_prefix};
+}
+
+}  // namespace validator
+}  // namespace ton