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| author | j-berman <justinberman@protonmail.com> | 2021-11-15 05:23:53 -0800 |
|---|---|---|
| committer | j-berman <justinberman@protonmail.com> | 2022-04-18 00:49:53 -0700 |
| commit | ea87b30f8907ee11252433811e7a7d0c46758cca (patch) | |
| tree | 61dedf56a781a83285be092b078019bebdc94f2e /src/device/device_ledger.cpp | |
| parent | Merge pull request #8207 (diff) | |
| download | monero-ea87b30f8907ee11252433811e7a7d0c46758cca.tar.xz | |
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.
Diffstat (limited to 'src/device/device_ledger.cpp')
| -rw-r--r-- | src/device/device_ledger.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/device/device_ledger.cpp b/src/device/device_ledger.cpp index 378d9f533..84c81bfcd 100644 --- a/src/device/device_ledger.cpp +++ b/src/device/device_ledger.cpp @@ -1527,7 +1527,8 @@ namespace hw { const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys, std::vector<crypto::public_key> &additional_tx_public_keys, std::vector<rct::key> &amount_keys, - crypto::public_key &out_eph_public_key) { + crypto::public_key &out_eph_public_key, + bool use_view_tags, crypto::view_tag &view_tag) { AUTO_LOCK_CMD(); #ifdef DEBUG_HWDEVICE @@ -1541,6 +1542,8 @@ namespace hw { const boost::optional<cryptonote::account_public_address> change_addr_x = change_addr; const size_t output_index_x = output_index; const bool need_additional_txkeys_x = need_additional_txkeys; + const bool use_view_tags_x = use_view_tags; + const crypto::view_tag view_tag_x = view_tag; std::vector<crypto::secret_key> additional_tx_keys_x; for (const auto &k: additional_tx_keys) { @@ -1568,7 +1571,7 @@ namespace hw { log_hexbuffer("generate_output_ephemeral_keys: [[IN]] additional_tx_keys[oi]", additional_tx_keys_x[output_index].data, 32); } this->controle_device->generate_output_ephemeral_keys(tx_version_x, sender_account_keys_x, txkey_pub_x, tx_key_x, dst_entr_x, change_addr_x, output_index_x, need_additional_txkeys_x, additional_tx_keys_x, - additional_tx_public_keys_x, amount_keys_x, out_eph_public_key_x); + additional_tx_public_keys_x, amount_keys_x, out_eph_public_key_x, use_view_tags_x, view_tag_x); if(need_additional_txkeys_x) { log_hexbuffer("additional_tx_public_keys_x: [[OUT]] additional_tx_public_keys_x", additional_tx_public_keys_x.back().data, 32); } |