diff options
Diffstat (limited to 'src/wallet/wallet2.cpp')
| -rw-r--r-- | src/wallet/wallet2.cpp | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp index ebf857b78..6f919d12c 100644 --- a/src/wallet/wallet2.cpp +++ b/src/wallet/wallet2.cpp @@ -6841,21 +6841,23 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>> //static const double shape = m_testnet ? 17.02 : 17.28; static const double scale = 1/1.61; std::gamma_distribution<double> gamma(shape, scale); + THROW_WALLET_EXCEPTION_IF(rct_offsets.size() <= CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE, error::wallet_internal_error, "Bad offset calculation"); + uint64_t last_usable_block = rct_offsets.size() - 1; auto pick_gamma = [&]() { double x = gamma(engine); x = exp(x); uint64_t block_offset = x / DIFFICULTY_TARGET_V2; // this assumes constant target over the whole rct range - if (block_offset >= rct_offsets.size() - 1) + if (block_offset > last_usable_block - CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE) return std::numeric_limits<uint64_t>::max(); // bad pick - block_offset = rct_offsets.size() - 2 - block_offset; - THROW_WALLET_EXCEPTION_IF(block_offset >= rct_offsets.size() - 1, error::wallet_internal_error, "Bad offset calculation"); - THROW_WALLET_EXCEPTION_IF(rct_offsets[block_offset + 1] < rct_offsets[block_offset], + block_offset = last_usable_block - block_offset; + THROW_WALLET_EXCEPTION_IF(block_offset > last_usable_block, error::wallet_internal_error, "Bad offset calculation"); + THROW_WALLET_EXCEPTION_IF(block_offset > 0 && rct_offsets[block_offset] < rct_offsets[block_offset - 1], error::get_output_distribution, "Decreasing offsets in rct distribution: " + - std::to_string(block_offset) + ": " + std::to_string(rct_offsets[block_offset]) + ", " + - std::to_string(block_offset + 1) + ": " + std::to_string(rct_offsets[block_offset + 1])); + std::to_string(block_offset - 1) + ": " + std::to_string(rct_offsets[block_offset - 1]) + ", " + + std::to_string(block_offset) + ": " + std::to_string(rct_offsets[block_offset])); uint64_t first_block_offset = block_offset, last_block_offset = block_offset; - for (size_t half_window = 0; half_window < GAMMA_PICK_HALF_WINDOW; ++half_window) + for (size_t half_window = 0; half_window <= GAMMA_PICK_HALF_WINDOW; ++half_window) { // end when we have a non empty block uint64_t cum0 = first_block_offset > 0 ? rct_offsets[first_block_offset] - rct_offsets[first_block_offset - 1] : rct_offsets[0]; @@ -6864,19 +6866,24 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>> uint64_t cum1 = last_block_offset > 0 ? rct_offsets[last_block_offset] - rct_offsets[last_block_offset - 1] : rct_offsets[0]; if (cum1 > 1) break; - if (first_block_offset == 0 && last_block_offset >= rct_offsets.size() - 2) + if (first_block_offset == 0 && last_block_offset >= last_usable_block) break; // expand up to bounds if (first_block_offset > 0) --first_block_offset; - if (last_block_offset < rct_offsets.size() - 1) + else + return std::numeric_limits<uint64_t>::max(); // bad pick + if (last_block_offset < last_usable_block - CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE) ++last_block_offset; + else + return std::numeric_limits<uint64_t>::max(); // bad pick } - const uint64_t n_rct = rct_offsets[last_block_offset] - (first_block_offset == 0 ? 0 : rct_offsets[first_block_offset - 1]); + const uint64_t first_rct = first_block_offset == 0 ? 0 : rct_offsets[first_block_offset - 1]; + const uint64_t n_rct = rct_offsets[last_block_offset] - first_rct; if (n_rct == 0) return rct_offsets[block_offset] ? rct_offsets[block_offset] - 1 : 0; - MDEBUG("Picking 1/" << n_rct << " in " << (last_block_offset - first_block_offset + 1) << " blocks centered around " << block_offset); - return rct_offsets[first_block_offset] + crypto::rand<uint64_t>() % n_rct; + MDEBUG("Picking 1/" << n_rct << " in " << (last_block_offset - first_block_offset + 1) << " blocks centered around " << block_offset + rct_start_height); + return first_rct + crypto::rand<uint64_t>() % n_rct; }; size_t num_selected_transfers = 0; |