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wallet2: speed up transactions using remote nodes

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Asking for a full histogram from a remote node (since it's
untrusted) is pretty slow, and spams the remote node, so
we replace it by only adding a second input if we have rct
ones, which are for all intents and purposes always mixable.
This commit is contained in:
moneromooo-monero 2017-03-20 08:44:28 +00:00
parent 73e8510717
commit c1e9ccc794
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GPG Key ID: 686F07454D6CEFC3
2 changed files with 42 additions and 4 deletions
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44
src/wallet/wallet2.cpp
View File

@ -4120,7 +4120,7 @@ std::vector<size_t> wallet2::pick_preferred_rct_inputs(uint64_t needed_money) co
return picks;
}
static bool should_pick_a_second_output(bool use_rct, size_t n_transfers, const std::vector<size_t> &unused_transfers_indices, const std::vector<size_t> &unused_dust_indices)
bool wallet2::should_pick_a_second_output(bool use_rct, size_t n_transfers, const std::vector<size_t> &unused_transfers_indices, const std::vector<size_t> &unused_dust_indices) const
{
if (!use_rct)
return false;
@ -4128,9 +4128,43 @@ static bool should_pick_a_second_output(bool use_rct, size_t n_transfers, const
return false;
if (unused_dust_indices.empty() && unused_transfers_indices.empty())
return false;
// we want at least one free rct output to avoid a corner case where
// we'd choose a non rct output which doesn't have enough "siblings"
// value-wise on the chain, and thus can't be mixed
bool found = false;
for (auto i: unused_dust_indices)
{
if (m_transfers[i].is_rct())
{
found = true;
break;
}
}
if (!found) for (auto i: unused_transfers_indices)
{
if (m_transfers[i].is_rct())
{
found = true;
break;
}
}
if (!found)
return false;
return true;
}
std::vector<size_t> wallet2::get_only_rct(const std::vector<size_t> &unused_dust_indices, const std::vector<size_t> &unused_transfers_indices) const
{
std::vector<size_t> indices;
for (size_t n: unused_dust_indices)
if (m_transfers[n].is_rct())
indices.push_back(n);
for (size_t n: unused_transfers_indices)
if (m_transfers[n].is_rct())
indices.push_back(n);
return indices;
}
// Another implementation of transaction creation that is hopefully better
// While there is anything left to pay, it goes through random outputs and tries
// to fill the next destination/amount. If it fully fills it, it will use the
@ -4195,8 +4229,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
THROW_WALLET_EXCEPTION_IF(needed_money == 0, error::zero_destination);
// gather all our dust and non dust outputs
const std::vector<size_t> unused_indices = select_available_outputs_from_histogram(fake_outs_count + 1, true, true, true, trusted_daemon);
for (size_t i: unused_indices)
for (size_t i = 0; i < m_transfers.size(); ++i)
{
const transfer_details& td = m_transfers[i];
if (!td.m_spent && (use_rct ? true : !td.is_rct()) && is_transfer_unlocked(td))
@ -4279,7 +4312,8 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
size_t idx;
if ((dsts.empty() || dsts[0].amount == 0) && !adding_fee) {
// the "make rct txes 2/2" case - we pick a small value output to "clean up" the wallet too
idx = pop_best_value(unused_dust_indices.empty() ? unused_transfers_indices : unused_dust_indices, tx.selected_transfers, true);
std::vector<size_t> indices = get_only_rct(unused_dust_indices, unused_transfers_indices);
idx = pop_best_value(indices, tx.selected_transfers, true);
// since we're trying to add a second output which is not strictly needed,
// we only add it if it's unrelated enough to the first one
@ -4289,6 +4323,8 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
LOG_PRINT_L2("Second outout was not strictly needed, and relatedness " << relatedness << ", not adding");
break;
}
pop_if_present(unused_transfers_indices, idx);
pop_if_present(unused_dust_indices, idx);
} else if (!prefered_inputs.empty()) {
idx = pop_back(prefered_inputs);
pop_if_present(unused_transfers_indices, idx);

2
src/wallet/wallet2.h
View File

@ -633,6 +633,8 @@ namespace tools
void get_outs(std::vector<std::vector<get_outs_entry>> &outs, const std::list<size_t> &selected_transfers, size_t fake_outputs_count);
bool wallet_generate_key_image_helper(const cryptonote::account_keys& ack, const crypto::public_key& tx_public_key, size_t real_output_index, cryptonote::keypair& in_ephemeral, crypto::key_image& ki);
crypto::public_key get_tx_pub_key_from_received_outs(const tools::wallet2::transfer_details &td) const;
bool should_pick_a_second_output(bool use_rct, size_t n_transfers, const std::vector<size_t> &unused_transfers_indices, const std::vector<size_t> &unused_dust_indices) const;
std::vector<size_t> get_only_rct(const std::vector<size_t> &unused_dust_indices, const std::vector<size_t> &unused_transfers_indices) const;
cryptonote::account_base m_account;
boost::optional<epee::net_utils::http::login> m_daemon_login;