blockchain: forbid v1 coinbase from v12

src/cryptonote_config.h

@@ -150,6 +150,7 @@
 #define HF_VERSION_SMALLER_BP                   10
 #define HF_VERSION_LONG_TERM_BLOCK_WEIGHT       10
 #define HF_VERSION_MIN_2_OUTPUTS                12
+#define HF_VERSION_MIN_V2_COINBASE_TX           12
 
 #define PER_KB_FEE_QUANTIZATION_DECIMALS        8
 

src/cryptonote_core/blockchain.cpp

@@ -1202,11 +1202,12 @@ difficulty_type Blockchain::get_next_difficulty_for_alternative_chain(const std:
 //   one input, of type txin_gen, with height set to the block's height
 //   correct miner tx unlock time
 //   a non-overflowing tx amount (dubious necessity on this check)
-bool Blockchain::prevalidate_miner_transaction(const block& b, uint64_t height)
+bool Blockchain::prevalidate_miner_transaction(const block& b, uint64_t height, uint8_t hf_version)
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CHECK_AND_ASSERT_MES(b.miner_tx.vin.size() == 1, false, "coinbase transaction in the block has no inputs");
   CHECK_AND_ASSERT_MES(b.miner_tx.vin[0].type() == typeid(txin_gen), false, "coinbase transaction in the block has the wrong type");
+  CHECK_AND_ASSERT_MES(b.miner_tx.version > 1 || hf_version < HF_VERSION_MIN_V2_COINBASE_TX, false, "Invalid coinbase transaction version");
   if(boost::get<txin_gen>(b.miner_tx.vin[0]).height != height)
   {
     MWARNING("The miner transaction in block has invalid height: " << boost::get<txin_gen>(b.miner_tx.vin[0]).height << ", expected: " << height);
@@ -1713,6 +1714,7 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
   }
 
   // this is a cheap test
+  const uint8_t hf_version = m_hardfork->get_ideal_version(block_height);
   if (!m_hardfork->check_for_height(b, block_height))
   {
     LOG_PRINT_L1("Block with id: " << id << std::endl << "has old version for height " << block_height);
@@ -1770,7 +1772,7 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
       return false;
     }
 
-    if(!prevalidate_miner_transaction(b, bei.height))
+    if(!prevalidate_miner_transaction(b, bei.height, hf_version))
     {
       MERROR_VER("Block with id: " << epee::string_tools::pod_to_hex(id) << " (as alternative) has incorrect miner transaction.");
       bvc.m_verifivation_failed = true;
@@ -3615,9 +3617,10 @@ leave:
   }
 
   // this is a cheap test
+  const uint8_t hf_version = get_current_hard_fork_version();
   if (!m_hardfork->check(bl))
   {
-    MERROR_VER("Block with id: " << id << std::endl << "has old version: " << (unsigned)bl.major_version << std::endl << "current: " << (unsigned)m_hardfork->get_current_version());
+    MERROR_VER("Block with id: " << id << std::endl << "has old version: " << (unsigned)bl.major_version << std::endl << "current: " << (unsigned)hf_version);
     bvc.m_verifivation_failed = true;
     goto leave;
   }
@@ -3722,7 +3725,7 @@ leave:
   TIME_MEASURE_START(t3);
 
   // sanity check basic miner tx properties;
-  if(!prevalidate_miner_transaction(bl, blockchain_height))
+  if(!prevalidate_miner_transaction(bl, blockchain_height, hf_version))
   {
     MERROR_VER("Block with id: " << id << " failed to pass prevalidation");
     bvc.m_verifivation_failed = true;

src/cryptonote_core/blockchain.h

@@ -1246,10 +1246,11 @@ namespace cryptonote
      *
      * @param b the block containing the miner transaction
      * @param height the height at which the block will be added
+     * @param hf_version the consensus rules to apply
      *
      * @return false if anything is found wrong with the miner transaction, otherwise true
      */
-    bool prevalidate_miner_transaction(const block& b, uint64_t height);
+    bool prevalidate_miner_transaction(const block& b, uint64_t height, uint8_t hf_version);
 
     /**
      * @brief validates a miner (coinbase) transaction

tests/core_tests/block_validation.cpp

@@ -640,3 +640,18 @@ bool gen_block_invalid_binary_format::check_all_blocks_purged(cryptonote::core&
 
   return true;
 }
+
+bool gen_block_late_v1_coinbase_tx::generate(std::vector<test_event_entry>& events) const
+{
+  BLOCK_VALIDATION_INIT_GENERATE();
+
+  block blk_1;
+  generator.construct_block_manually(blk_1, blk_0, miner_account,
+      test_generator::bf_major_ver | test_generator::bf_minor_ver,
+      HF_VERSION_MIN_V2_COINBASE_TX, HF_VERSION_MIN_V2_COINBASE_TX);
+  events.push_back(blk_1);
+
+  DO_CALLBACK(events, "check_block_purged");
+
+  return true;
+}

tests/core_tests/block_validation.h

@@ -206,3 +206,15 @@ struct gen_block_invalid_binary_format : public test_chain_unit_base
 private:
   size_t m_corrupt_blocks_begin_idx;
 };
+
+struct gen_block_late_v1_coinbase_tx : public gen_block_verification_base<1>
+{
+  bool generate(std::vector<test_event_entry>& events) const;
+};
+template<>
+struct get_test_options<gen_block_late_v1_coinbase_tx> {
+  const std::pair<uint8_t, uint64_t> hard_forks[3] = {std::make_pair(1, 0), std::make_pair(HF_VERSION_MIN_V2_COINBASE_TX, 1), std::make_pair(0, 0)};
+  const cryptonote::test_options test_options = {
+    hard_forks, 0
+  };
+};

tests/core_tests/chaingen_main.cpp

@@ -133,6 +133,7 @@ int main(int argc, char* argv[])
     GENERATE_AND_PLAY(gen_block_has_invalid_tx);
     GENERATE_AND_PLAY(gen_block_is_too_big);
     GENERATE_AND_PLAY(gen_block_invalid_binary_format); // Takes up to 3 hours, if CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW == 500, up to 30 minutes, if CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW == 10
+    GENERATE_AND_PLAY(gen_block_late_v1_coinbase_tx);
 
     // Transaction verification tests
     GENERATE_AND_PLAY(gen_tx_big_version);