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wallet: more accurate blockchain height approximation #10165

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18 changes: 12 additions & 6 deletions src/wallet/wallet2.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -12826,17 +12826,23 @@ uint64_t wallet2::get_daemon_blockchain_target_height(string &err)

uint64_t wallet2::get_approximate_blockchain_height() const
{
// time of v2 fork
const time_t fork_time = m_nettype == TESTNET ? 1448285909 : m_nettype == STAGENET ? 1520937818 : 1458748658;
// v2 fork block
const uint64_t fork_block = m_nettype == TESTNET ? 624634 : m_nettype == STAGENET ? 32000 : 1009827;
const size_t wallet_num_hard_forks = m_nettype == TESTNET ? num_testnet_hard_forks
: m_nettype == STAGENET ? num_stagenet_hard_forks
: num_mainnet_hard_forks;
const hardfork_t *wallet_hard_forks = m_nettype == TESTNET ? testnet_hard_forks
: m_nettype == STAGENET ? stagenet_hard_forks
: mainnet_hard_forks;
// time of latest fork
const time_t fork_time = wallet_hard_forks[wallet_num_hard_forks-1].time;
// latest fork block
const uint64_t fork_block = wallet_hard_forks[wallet_num_hard_forks-1].height;
// avg seconds per block
const int seconds_per_block = DIFFICULTY_TARGET_V2;
// Calculated blockchain height
uint64_t approx_blockchain_height = fork_block + (time(NULL) - fork_time)/seconds_per_block;
// testnet and stagenet got some huge rollbacks, so the estimation is way off
static const uint64_t approximate_rolled_back_blocks = m_nettype == TESTNET ? 342100 : m_nettype == STAGENET ? 60000 : 30000;
if ((m_nettype == TESTNET || m_nettype == STAGENET) && approx_blockchain_height > approximate_rolled_back_blocks)
static const uint64_t approximate_rolled_back_blocks = m_nettype == TESTNET ? 26600 : m_nettype == STAGENET ? 48600 : 33600;
if (approx_blockchain_height > approximate_rolled_back_blocks)
approx_blockchain_height -= approximate_rolled_back_blocks;
LOG_PRINT_L2("Calculated blockchain height: " << approx_blockchain_height);
return approx_blockchain_height;
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