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wallet2: do not go over the target tx size if many destinations

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If using a large input and many destinations, the code would
generate as many outputs as it could using that input, even if
it would bring the resulting tx above the max tx size.
This commit is contained in:
moneromooo-monero 2017-04-02 11:13:15 +01:00
parent 9ae566d0dd
commit 0ee018b407
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GPG key ID: 686F07454D6CEFC3
1 changed files with 12 additions and 12 deletions
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24
src/wallet/wallet2.cpp
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@ -4102,6 +4102,14 @@ static size_t estimate_rct_tx_size(int n_inputs, int mixin, int n_outputs)
return size; return size;
} }
static size_t estimate_tx_size(bool use_rct, int n_inputs, int mixin, int n_outputs)
{
if (use_rct)
return estimate_rct_tx_size(n_inputs, mixin, n_outputs + 1);
else
return n_inputs * (mixin+1) * APPROXIMATE_INPUT_BYTES;
}
std::vector<size_t> wallet2::pick_preferred_rct_inputs(uint64_t needed_money) const std::vector<size_t> wallet2::pick_preferred_rct_inputs(uint64_t needed_money) const
{ {
std::vector<size_t> picks; std::vector<size_t> picks;
@ -4409,7 +4417,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
} }
else else
{ {
while (!dsts.empty() && dsts[0].amount <= available_amount) while (!dsts.empty() && dsts[0].amount <= available_amount && estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size()) < TX_SIZE_TARGET(upper_transaction_size_limit))
{ {
// we can fully pay that destination // we can fully pay that destination
LOG_PRINT_L2("We can fully pay " << get_account_address_as_str(m_testnet, dsts[0].addr) << LOG_PRINT_L2("We can fully pay " << get_account_address_as_str(m_testnet, dsts[0].addr) <<
@ -4420,7 +4428,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
pop_index(dsts, 0); pop_index(dsts, 0);
} }
if (available_amount > 0 && !dsts.empty()) { if (available_amount > 0 && !dsts.empty() && estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size()) < TX_SIZE_TARGET(upper_transaction_size_limit)) {
// we can partially fill that destination // we can partially fill that destination
LOG_PRINT_L2("We can partially pay " << get_account_address_as_str(m_testnet, dsts[0].addr) << LOG_PRINT_L2("We can partially pay " << get_account_address_as_str(m_testnet, dsts[0].addr) <<
" for " << print_money(available_amount) << "/" << print_money(dsts[0].amount)); " for " << print_money(available_amount) << "/" << print_money(dsts[0].amount));
@ -4441,11 +4449,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
} }
else else
{ {
size_t estimated_rct_tx_size; const size_t estimated_rct_tx_size = estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size());
if (use_rct)
estimated_rct_tx_size = estimate_rct_tx_size(tx.selected_transfers.size(), fake_outs_count, tx.dsts.size() + 1);
else
estimated_rct_tx_size = tx.selected_transfers.size() * (fake_outs_count+1) * APPROXIMATE_INPUT_BYTES;
try_tx = dsts.empty() || (estimated_rct_tx_size >= TX_SIZE_TARGET(upper_transaction_size_limit)); try_tx = dsts.empty() || (estimated_rct_tx_size >= TX_SIZE_TARGET(upper_transaction_size_limit));
} }
@ -4633,11 +4637,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
// here, check if we need to sent tx and start a new one // here, check if we need to sent tx and start a new one
LOG_PRINT_L2("Considering whether to create a tx now, " << tx.selected_transfers.size() << " inputs, tx limit " LOG_PRINT_L2("Considering whether to create a tx now, " << tx.selected_transfers.size() << " inputs, tx limit "
<< upper_transaction_size_limit); << upper_transaction_size_limit);
size_t estimated_rct_tx_size; const size_t estimated_rct_tx_size = estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size() + 1);
if (use_rct)
estimated_rct_tx_size = estimate_rct_tx_size(tx.selected_transfers.size(), fake_outs_count, tx.dsts.size() + 1);
else
estimated_rct_tx_size = tx.selected_transfers.size() * (fake_outs_count+1) * APPROXIMATE_INPUT_BYTES;
bool try_tx = (unused_dust_indices.empty() && unused_transfers_indices.empty()) || ( estimated_rct_tx_size >= TX_SIZE_TARGET(upper_transaction_size_limit)); bool try_tx = (unused_dust_indices.empty() && unused_transfers_indices.empty()) || ( estimated_rct_tx_size >= TX_SIZE_TARGET(upper_transaction_size_limit));
if (try_tx) { if (try_tx) {