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enforce claiming maximum coinbase amount

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Claiming a slightly lesser amount does not yield the size gains
that were seen pre rct, so this closes a fingerprinting vector
This commit is contained in:
moneromooo-monero 2020-08-14 21:12:11 +00:00
parent 5d850dde99
commit 844fb4e940
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GPG key ID: 686F07454D6CEFC3
5 changed files with 33 additions and 2 deletions
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1
src/cryptonote_config.h
View file

@ -173,6 +173,7 @@
#define HF_VERSION_REJECT_SIGS_IN_COINBASE 12
#define HF_VERSION_ENFORCE_MIN_AGE 12
#define HF_VERSION_EFFECTIVE_SHORT_TERM_MEDIAN_IN_PENALTY 12
#define HF_VERSION_EXACT_COINBASE 13
#define PER_KB_FEE_QUANTIZATION_DECIMALS 8

4
src/cryptonote_core/blockchain.cpp
View file

@ -1392,8 +1392,8 @@ bool Blockchain::validate_miner_transaction(const block& b, size_t cumulative_bl
MERROR_VER("coinbase transaction spend too much money (" << print_money(money_in_use) << "). Block reward is " << print_money(base_reward + fee) << "(" << print_money(base_reward) << "+" << print_money(fee) << "), cumulative_block_weight " << cumulative_block_weight);
return false;
}
// From hard fork 2, we allow a miner to claim less block reward than is allowed, in case a miner wants less dust
if (version < 2)
// From hard fork 2 till 12, we allow a miner to claim less block reward than is allowed, in case a miner wants less dust
if (version < 2 || version >= HF_VERSION_EXACT_COINBASE)
{
if(base_reward + fee != money_in_use)
{

16
tests/core_tests/block_validation.cpp
View file

@ -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;
}

12
tests/core_tests/block_validation.h
View file

@ -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
};
};

2
tests/core_tests/chaingen_main.cpp
View file

@ -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)
{