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New "Halfway RingCT" outputs for coinbase transactions

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When RingCT is enabled, outputs from coinbase transactions
are created as a single output, and stored as RingCT output,
with a fake mask. Their amount is not hidden on the blockchain
itself, but they are then able to be used as fake inputs in
a RingCT ring. Since the output amounts are hidden, their
"dustiness" is not an obstacle anymore to mixing, and this
makes the coinbase transactions a lot smaller, as well as
helping the TXO set to grow more slowly.

Also add a new "Null" type of rct signature, which decreases
the size required when no signatures are to be stored, as
in a coinbase tx.
This commit is contained in:
moneromooo-monero 2016-08-12 18:45:07 +01:00
parent 6f526cdff8
commit c3b3260ae5
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
19 changed files with 120 additions and 36 deletions
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17
src/wallet/wallet2.cpp
View file

@ -489,10 +489,17 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
{
td.m_mask = mask[o];
td.m_amount = amount[o];
td.m_rct = true;
}
else if (miner_tx && tx.version == 2)
{
td.m_mask = rct::identity();
td.m_rct = true;
}
else
{
td.m_mask = rct::identity();
td.m_rct = false;
}
set_unspent(td);
m_key_images[td.m_key_image] = m_transfers.size()-1;
@ -529,10 +536,17 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
{
td.m_mask = mask[o];
td.m_amount = amount[o];
td.m_rct = true;
}
else if (miner_tx && tx.version == 2)
{
td.m_mask = rct::identity();
td.m_rct = true;
}
else
{
td.m_mask = rct::identity();
td.m_rct = false;
}
THROW_WALLET_EXCEPTION_IF(td.m_key_image != ki[o], error::wallet_internal_error, "Inconsistent key images");
THROW_WALLET_EXCEPTION_IF(td.m_spent, error::wallet_internal_error, "Inconsistent spent status");
@ -2847,6 +2861,7 @@ void wallet2::transfer_selected(const std::vector<cryptonote::tx_destination_ent
cryptonote::tx_source_entry& src = sources.back();
transfer_details& td = *it;
src.amount = td.amount();
src.rct = td.is_rct();
//paste keys (fake and real)
for (size_t n = 0; n < fake_outputs_count + 1; ++n)
@ -3037,6 +3052,7 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
cryptonote::tx_source_entry& src = sources.back();
transfer_details& td = *it;
src.amount = td.amount();
src.rct = td.is_rct();
//paste mixin transaction
if(it->is_rct())
{
@ -3732,6 +3748,7 @@ void wallet2::transfer_from(const std::vector<size_t> &outs, size_t num_outputs,
cryptonote::tx_source_entry& src = sources.back();
transfer_details& td = *it;
src.amount = td.amount();
src.rct = td.is_rct();
//paste real transaction to the random index
auto it_to_insert = std::find_if(src.outputs.begin(), src.outputs.end(), [&](const tx_output_entry& a)