enforce claiming maximum coinbase amount

Claiming a slightly lesser amount does not yield the size gains
that were seen pre rct, so this closes a fingerprinting vector

3 files changed, 30 insertions, 0 deletions

diff --git a/tests/core_tests/block_validation.cpp b/tests/core_tests/block_validation.cpp
index 10b1b9af4..fb8ddbe11 100644
--- a/tests/core_tests/block_validation.cpp
+++ b/tests/core_tests/block_validation.cpp
@@ -655,3 +655,19 @@ bool gen_block_late_v1_coinbase_tx::generate(std::vector<test_event_entry>& even
 
   return true;
 }
+
+bool gen_block_low_coinbase::generate(std::vector<test_event_entry>& events) const
+{
+  BLOCK_VALIDATION_INIT_GENERATE();
+
+  block blk_1;
+  std::vector<size_t> block_weights;
+  generator.construct_block(blk_1, cryptonote::get_block_height(blk_0) + 1, cryptonote::get_block_hash(blk_0),
+    miner_account, blk_0.timestamp + DIFFICULTY_TARGET_V2, COIN + generator.get_already_generated_coins(cryptonote::get_block_hash(blk_0)),
+    block_weights, {}, HF_VERSION_EXACT_COINBASE);
+  events.push_back(blk_1);
+
+  DO_CALLBACK(events, "check_block_purged");
+
+  return true;
+}
diff --git a/tests/core_tests/block_validation.h b/tests/core_tests/block_validation.h
index 39eba0829..0dd4e145c 100644
--- a/tests/core_tests/block_validation.h
+++ b/tests/core_tests/block_validation.h
@@ -218,3 +218,15 @@ struct get_test_options<gen_block_late_v1_coinbase_tx> {
     hard_forks, 0
   };
 };
+
+struct gen_block_low_coinbase : public gen_block_verification_base<1>
+{
+  bool generate(std::vector<test_event_entry>& events) const;
+};
+template<>
+struct get_test_options<gen_block_low_coinbase> {
+  const std::pair<uint8_t, uint64_t> hard_forks[3] = {std::make_pair(1, 0), std::make_pair(HF_VERSION_EXACT_COINBASE, 1), std::make_pair(0, 0)};
+  const cryptonote::test_options test_options = {
+    hard_forks, 0
+  };
+};
diff --git a/tests/core_tests/chaingen_main.cpp b/tests/core_tests/chaingen_main.cpp
index 38382b95f..9895d4814 100644
--- a/tests/core_tests/chaingen_main.cpp
+++ b/tests/core_tests/chaingen_main.cpp
@@ -264,6 +264,8 @@ int main(int argc, char* argv[])
     GENERATE_AND_PLAY(gen_bp_tx_invalid_wrong_amount);
     GENERATE_AND_PLAY(gen_bp_tx_invalid_borromean_type);
 
+    GENERATE_AND_PLAY(gen_block_low_coinbase);
+
     el::Level level = (failed_tests.empty() ? el::Level::Info : el::Level::Error);
     if (!list_tests)
     {