From ea87b30f8907ee11252433811e7a7d0c46758cca Mon Sep 17 00:00:00 2001 From: j-berman Date: Mon, 15 Nov 2021 05:23:53 -0800 Subject: Add view tags to outputs to reduce wallet scanning time Implements view tags as proposed by @UkoeHB in MRL issue https://github.com/monero-project/research-lab/issues/73 At tx construction, the sender adds a 1-byte view tag to each output. The view tag is derived from the sender-receiver shared secret. When scanning for outputs, the receiver can check the view tag for a match, in order to reduce scanning time. When the view tag does not match, the wallet avoids the more expensive EC operations when deriving the output public key using the shared secret. --- src/cryptonote_core/cryptonote_core.cpp | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'src/cryptonote_core/cryptonote_core.cpp') diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp index 2d2b1cbcf..a78f5d673 100644 --- a/src/cryptonote_core/cryptonote_core.cpp +++ b/src/cryptonote_core/cryptonote_core.cpp @@ -1177,7 +1177,8 @@ namespace cryptonote return false; } - if (!check_tx_inputs_ring_members_diff(tx)) + const uint8_t hf_version = m_blockchain_storage.get_current_hard_fork_version(); + if (!check_tx_inputs_ring_members_diff(tx, hf_version)) { MERROR_VER("tx uses duplicate ring members"); return false; @@ -1189,6 +1190,12 @@ namespace cryptonote return false; } + if (!check_output_types(tx, hf_version)) + { + MERROR_VER("tx does not use valid output type(s)"); + return false; + } + return true; } //----------------------------------------------------------------------------------------------- @@ -1295,10 +1302,9 @@ namespace cryptonote return true; } //----------------------------------------------------------------------------------------------- - bool core::check_tx_inputs_ring_members_diff(const transaction& tx) const + bool core::check_tx_inputs_ring_members_diff(const transaction& tx, const uint8_t hf_version) const { - const uint8_t version = m_blockchain_storage.get_current_hard_fork_version(); - if (version >= 6) + if (hf_version >= 6) { for(const auto& in: tx.vin) { -- cgit v1.2.3