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rpc: add a dynamic fee estimation RPC call

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moneromooo-monero
2016-10-28 21:19:40 +01:00
parent 82dbba10d4
commit e6deb8abda
5 changed files with 76 additions and 0 deletions
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30
src/cryptonote_core/blockchain.cpp
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@@ -2760,6 +2760,36 @@ bool Blockchain::check_fee(size_t blob_size, uint64_t fee) const
return true;
}
//------------------------------------------------------------------
uint64_t Blockchain::get_dynamic_per_kb_fee_estimate(uint64_t grace_blocks) const
{
const uint8_t version = get_current_hard_fork_version();
if (version < HF_VERSION_DYNAMIC_FEE)
return FEE_PER_KB;
if (grace_blocks >= CRYPTONOTE_REWARD_BLOCKS_WINDOW)
grace_blocks = CRYPTONOTE_REWARD_BLOCKS_WINDOW - 1;
std::vector<size_t> sz;
get_last_n_blocks_sizes(sz, CRYPTONOTE_REWARD_BLOCKS_WINDOW - grace_blocks);
for (size_t i = 0; i < grace_blocks; ++i)
sz.push_back(CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2);
uint64_t median = epee::misc_utils::median(sz);
if(median <= CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2)
median = CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2;
uint64_t already_generated_coins = m_db->height() ? m_db->get_block_already_generated_coins(m_db->height() - 1) : 0;
uint64_t base_reward;
if (!get_block_reward(median, 1, already_generated_coins, base_reward, version))
return false;
uint64_t fee = get_dynamic_per_kb_fee(base_reward, median);
LOG_PRINT_L2("Estimating " << grace_blocks << "-block fee at " << print_money(fee) << "/kB");
return fee;
}
//------------------------------------------------------------------
// This function checks to see if a tx is unlocked. unlock_time is either
// a block index or a unix time.