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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/cryptonote_basic/cryptonote_format_utils.h | |
| 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/cryptonote_basic/cryptonote_format_utils.h')
| -rw-r--r-- | src/cryptonote_basic/cryptonote_format_utils.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/cryptonote_basic/cryptonote_format_utils.h b/src/cryptonote_basic/cryptonote_format_utils.h index ce3ce7492..8f5459ca7 100644 --- a/src/cryptonote_basic/cryptonote_format_utils.h +++ b/src/cryptonote_basic/cryptonote_format_utils.h @@ -89,13 +89,16 @@ namespace cryptonote void set_encrypted_payment_id_to_tx_extra_nonce(blobdata& extra_nonce, const crypto::hash8& payment_id); bool get_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash& payment_id); bool get_encrypted_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash8& payment_id); - bool is_out_to_acc(const account_keys& acc, const txout_to_key& out_key, const crypto::public_key& tx_pub_key, const std::vector<crypto::public_key>& additional_tx_public_keys, size_t output_index); + void set_tx_out(const uint64_t amount, const crypto::public_key& output_public_key, const bool use_view_tags, const crypto::view_tag& view_tag, tx_out& out); + bool check_output_types(const transaction& tx, const uint8_t hf_version); + bool out_can_be_to_acc(const boost::optional<crypto::view_tag>& view_tag_opt, const crypto::key_derivation& derivation, const size_t output_index); + bool is_out_to_acc(const account_keys& acc, const crypto::public_key& output_public_key, const crypto::public_key& tx_pub_key, const std::vector<crypto::public_key>& additional_tx_public_keys, size_t output_index, const boost::optional<crypto::view_tag>& view_tag_opt = boost::optional<crypto::view_tag>()); struct subaddress_receive_info { subaddress_index index; crypto::key_derivation derivation; }; - boost::optional<subaddress_receive_info> is_out_to_acc_precomp(const std::unordered_map<crypto::public_key, subaddress_index>& subaddresses, const crypto::public_key& out_key, const crypto::key_derivation& derivation, const std::vector<crypto::key_derivation>& additional_derivations, size_t output_index, hw::device &hwdev); + boost::optional<subaddress_receive_info> is_out_to_acc_precomp(const std::unordered_map<crypto::public_key, subaddress_index>& subaddresses, const crypto::public_key& out_key, const crypto::key_derivation& derivation, const std::vector<crypto::key_derivation>& additional_derivations, size_t output_index, hw::device &hwdev, const boost::optional<crypto::view_tag>& view_tag_opt = boost::optional<crypto::view_tag>()); bool lookup_acc_outs(const account_keys& acc, const transaction& tx, const crypto::public_key& tx_pub_key, const std::vector<crypto::public_key>& additional_tx_public_keys, std::vector<size_t>& outs, uint64_t& money_transfered); bool lookup_acc_outs(const account_keys& acc, const transaction& tx, std::vector<size_t>& outs, uint64_t& money_transfered); bool get_tx_fee(const transaction& tx, uint64_t & fee); @@ -126,6 +129,8 @@ namespace cryptonote bool parse_and_validate_block_from_blob(const blobdata_ref& b_blob, block& b, crypto::hash &block_hash); bool get_inputs_money_amount(const transaction& tx, uint64_t& money); uint64_t get_outs_money_amount(const transaction& tx); + bool get_output_public_key(const cryptonote::tx_out& out, crypto::public_key& output_public_key); + boost::optional<crypto::view_tag> get_output_view_tag(const cryptonote::tx_out& out); bool check_inputs_types_supported(const transaction& tx); bool check_outs_valid(const transaction& tx); bool parse_amount(uint64_t& amount, const std::string& str_amount); |