New "Halfway RingCT" outputs for coinbase transactions

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.

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/core_tests/double_spend.inl b/tests/core_tests/double_spend.inl
index e9ec1c2cd..f97d48851 100644
--- a/tests/core_tests/double_spend.inl
+++ b/tests/core_tests/double_spend.inl
@@ -130,6 +130,7 @@ bool gen_double_spend_in_tx<txs_keeped_by_block>::generate(std::vector<test_even
   se.amount = tx_0.vout[0].amount;
   se.push_output(0, boost::get<cryptonote::txout_to_key>(tx_0.vout[0].target).key, se.amount);
   se.real_output = 0;
+  se.rct = false;
   se.real_out_tx_key = get_tx_pub_key_from_extra(tx_0);
   se.real_output_in_tx_index = 0;
   sources.push_back(se);